* [Qemu-devel] [PATCH 5/5] vnc: rename vnc-encoding-* vnc-enc-*
2010-06-04 13:18 [Qemu-devel] [PATCH 0/5] vnc updates and ui move Corentin Chary
` (3 preceding siblings ...)
2010-06-04 13:18 ` [Qemu-devel] [PATCH 3/5] vnc: add lossless option Corentin Chary
@ 2010-06-04 13:18 ` Corentin Chary
2010-06-04 13:18 ` [Qemu-devel] " Alexander Graf
4 siblings, 1 reply; 16+ messages in thread
From: Corentin Chary @ 2010-06-04 13:18 UTC (permalink / raw)
To: Qemu-development List; +Cc: Corentin Chary, Anthony Liguori, Alexander Graf
For the same reason that we don't use vnc-authentication-sasl.c but
vnc-auth-sals.c. Because it's tooooo long.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
---
Makefile.objs | 4 +-
ui/vnc-enc-hextile-template.h | 211 ++++++
ui/vnc-enc-hextile.c | 116 ++++
ui/vnc-enc-tight.c | 1522 +++++++++++++++++++++++++++++++++++++++++
ui/vnc-enc-tight.h | 181 +++++
ui/vnc-enc-zlib.c | 152 ++++
ui/vnc-encoding-hextile.c | 116 ----
ui/vnc-encoding-tight.c | 1522 -----------------------------------------
ui/vnc-encoding-tight.h | 181 -----
ui/vnc-encoding-zlib.c | 152 ----
ui/vnchextile.h | 211 ------
11 files changed, 2184 insertions(+), 2184 deletions(-)
create mode 100644 ui/vnc-enc-hextile-template.h
create mode 100644 ui/vnc-enc-hextile.c
create mode 100644 ui/vnc-enc-tight.c
create mode 100644 ui/vnc-enc-tight.h
create mode 100644 ui/vnc-enc-zlib.c
delete mode 100644 ui/vnc-encoding-hextile.c
delete mode 100644 ui/vnc-encoding-tight.c
delete mode 100644 ui/vnc-encoding-tight.h
delete mode 100644 ui/vnc-encoding-zlib.c
delete mode 100644 ui/vnchextile.h
diff --git a/Makefile.objs b/Makefile.objs
index d5973ba..22622a9 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -104,8 +104,8 @@ ui-obj-y += keymaps.o
ui-obj-$(CONFIG_SDL) += sdl.o sdl_zoom.o x_keymap.o
ui-obj-$(CONFIG_CURSES) += curses.o
ui-obj-y += vnc.o d3des.o
-ui-obj-y += vnc-encoding-zlib.o vnc-encoding-hextile.o
-ui-obj-y += vnc-encoding-tight.o
+ui-obj-y += vnc-enc-zlib.o vnc-enc-hextile.o
+ui-obj-y += vnc-enc-tight.o
ui-obj-$(CONFIG_VNC_TLS) += vnc-tls.o vnc-auth-vencrypt.o
ui-obj-$(CONFIG_VNC_SASL) += vnc-auth-sasl.o
ui-obj-$(CONFIG_COCOA) += cocoa.o
diff --git a/ui/vnc-enc-hextile-template.h b/ui/vnc-enc-hextile-template.h
new file mode 100644
index 0000000..b9f9f5e
--- /dev/null
+++ b/ui/vnc-enc-hextile-template.h
@@ -0,0 +1,211 @@
+#define CONCAT_I(a, b) a ## b
+#define CONCAT(a, b) CONCAT_I(a, b)
+#define pixel_t CONCAT(uint, CONCAT(BPP, _t))
+#ifdef GENERIC
+#define NAME CONCAT(generic_, BPP)
+#else
+#define NAME BPP
+#endif
+
+static void CONCAT(send_hextile_tile_, NAME)(VncState *vs,
+ int x, int y, int w, int h,
+ void *last_bg_,
+ void *last_fg_,
+ int *has_bg, int *has_fg)
+{
+ VncDisplay *vd = vs->vd;
+ uint8_t *row = vd->server->data + y * ds_get_linesize(vs->ds) + x * ds_get_bytes_per_pixel(vs->ds);
+ pixel_t *irow = (pixel_t *)row;
+ int j, i;
+ pixel_t *last_bg = (pixel_t *)last_bg_;
+ pixel_t *last_fg = (pixel_t *)last_fg_;
+ pixel_t bg = 0;
+ pixel_t fg = 0;
+ int n_colors = 0;
+ int bg_count = 0;
+ int fg_count = 0;
+ int flags = 0;
+ uint8_t data[(vs->clientds.pf.bytes_per_pixel + 2) * 16 * 16];
+ int n_data = 0;
+ int n_subtiles = 0;
+
+ for (j = 0; j < h; j++) {
+ for (i = 0; i < w; i++) {
+ switch (n_colors) {
+ case 0:
+ bg = irow[i];
+ n_colors = 1;
+ break;
+ case 1:
+ if (irow[i] != bg) {
+ fg = irow[i];
+ n_colors = 2;
+ }
+ break;
+ case 2:
+ if (irow[i] != bg && irow[i] != fg) {
+ n_colors = 3;
+ } else {
+ if (irow[i] == bg)
+ bg_count++;
+ else if (irow[i] == fg)
+ fg_count++;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ if (n_colors > 2)
+ break;
+ irow += ds_get_linesize(vs->ds) / sizeof(pixel_t);
+ }
+
+ if (n_colors > 1 && fg_count > bg_count) {
+ pixel_t tmp = fg;
+ fg = bg;
+ bg = tmp;
+ }
+
+ if (!*has_bg || *last_bg != bg) {
+ flags |= 0x02;
+ *has_bg = 1;
+ *last_bg = bg;
+ }
+
+ if (n_colors < 3 && (!*has_fg || *last_fg != fg)) {
+ flags |= 0x04;
+ *has_fg = 1;
+ *last_fg = fg;
+ }
+
+ switch (n_colors) {
+ case 1:
+ n_data = 0;
+ break;
+ case 2:
+ flags |= 0x08;
+
+ irow = (pixel_t *)row;
+
+ for (j = 0; j < h; j++) {
+ int min_x = -1;
+ for (i = 0; i < w; i++) {
+ if (irow[i] == fg) {
+ if (min_x == -1)
+ min_x = i;
+ } else if (min_x != -1) {
+ hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
+ n_data += 2;
+ n_subtiles++;
+ min_x = -1;
+ }
+ }
+ if (min_x != -1) {
+ hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
+ n_data += 2;
+ n_subtiles++;
+ }
+ irow += ds_get_linesize(vs->ds) / sizeof(pixel_t);
+ }
+ break;
+ case 3:
+ flags |= 0x18;
+
+ irow = (pixel_t *)row;
+
+ if (!*has_bg || *last_bg != bg)
+ flags |= 0x02;
+
+ for (j = 0; j < h; j++) {
+ int has_color = 0;
+ int min_x = -1;
+ pixel_t color = 0; /* shut up gcc */
+
+ for (i = 0; i < w; i++) {
+ if (!has_color) {
+ if (irow[i] == bg)
+ continue;
+ color = irow[i];
+ min_x = i;
+ has_color = 1;
+ } else if (irow[i] != color) {
+ has_color = 0;
+#ifdef GENERIC
+ vnc_convert_pixel(vs, data + n_data, color);
+ n_data += vs->clientds.pf.bytes_per_pixel;
+#else
+ memcpy(data + n_data, &color, sizeof(color));
+ n_data += sizeof(pixel_t);
+#endif
+ hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
+ n_data += 2;
+ n_subtiles++;
+
+ min_x = -1;
+ if (irow[i] != bg) {
+ color = irow[i];
+ min_x = i;
+ has_color = 1;
+ }
+ }
+ }
+ if (has_color) {
+#ifdef GENERIC
+ vnc_convert_pixel(vs, data + n_data, color);
+ n_data += vs->clientds.pf.bytes_per_pixel;
+#else
+ memcpy(data + n_data, &color, sizeof(color));
+ n_data += sizeof(pixel_t);
+#endif
+ hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
+ n_data += 2;
+ n_subtiles++;
+ }
+ irow += ds_get_linesize(vs->ds) / sizeof(pixel_t);
+ }
+
+ /* A SubrectsColoured subtile invalidates the foreground color */
+ *has_fg = 0;
+ if (n_data > (w * h * sizeof(pixel_t))) {
+ n_colors = 4;
+ flags = 0x01;
+ *has_bg = 0;
+
+ /* we really don't have to invalidate either the bg or fg
+ but we've lost the old values. oh well. */
+ }
+ default:
+ break;
+ }
+
+ if (n_colors > 3) {
+ flags = 0x01;
+ *has_fg = 0;
+ *has_bg = 0;
+ n_colors = 4;
+ }
+
+ vnc_write_u8(vs, flags);
+ if (n_colors < 4) {
+ if (flags & 0x02)
+ vs->write_pixels(vs, &vd->server->pf, last_bg, sizeof(pixel_t));
+ if (flags & 0x04)
+ vs->write_pixels(vs, &vd->server->pf, last_fg, sizeof(pixel_t));
+ if (n_subtiles) {
+ vnc_write_u8(vs, n_subtiles);
+ vnc_write(vs, data, n_data);
+ }
+ } else {
+ for (j = 0; j < h; j++) {
+ vs->write_pixels(vs, &vd->server->pf, row,
+ w * ds_get_bytes_per_pixel(vs->ds));
+ row += ds_get_linesize(vs->ds);
+ }
+ }
+}
+
+#undef NAME
+#undef pixel_t
+#undef CONCAT_I
+#undef CONCAT
diff --git a/ui/vnc-enc-hextile.c b/ui/vnc-enc-hextile.c
new file mode 100644
index 0000000..fa4b264
--- /dev/null
+++ b/ui/vnc-enc-hextile.c
@@ -0,0 +1,116 @@
+/*
+ * QEMU VNC display driver: hextile encoding
+ *
+ * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
+ * Copyright (C) 2006 Fabrice Bellard
+ * Copyright (C) 2009 Red Hat, Inc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "vnc.h"
+
+static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
+{
+ ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F);
+ ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F);
+}
+
+#define BPP 8
+#include "vnc-enc-hextile-template.h"
+#undef BPP
+
+#define BPP 16
+#include "vnc-enc-hextile-template.h"
+#undef BPP
+
+#define BPP 32
+#include "vnc-enc-hextile-template.h"
+#undef BPP
+
+#define GENERIC
+#define BPP 8
+#include "vnc-enc-hextile-template.h"
+#undef BPP
+#undef GENERIC
+
+#define GENERIC
+#define BPP 16
+#include "vnc-enc-hextile-template.h"
+#undef BPP
+#undef GENERIC
+
+#define GENERIC
+#define BPP 32
+#include "vnc-enc-hextile-template.h"
+#undef BPP
+#undef GENERIC
+
+int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
+ int y, int w, int h)
+{
+ int i, j;
+ int has_fg, has_bg;
+ uint8_t *last_fg, *last_bg;
+ VncDisplay *vd = vs->vd;
+
+ last_fg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
+ last_bg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
+ has_fg = has_bg = 0;
+ for (j = y; j < (y + h); j += 16) {
+ for (i = x; i < (x + w); i += 16) {
+ vs->send_hextile_tile(vs, i, j,
+ MIN(16, x + w - i), MIN(16, y + h - j),
+ last_bg, last_fg, &has_bg, &has_fg);
+ }
+ }
+ free(last_fg);
+ free(last_bg);
+
+ return 1;
+}
+
+void vnc_hextile_set_pixel_conversion(VncState *vs, int generic)
+{
+ if (!generic) {
+ switch (vs->ds->surface->pf.bits_per_pixel) {
+ case 8:
+ vs->send_hextile_tile = send_hextile_tile_8;
+ break;
+ case 16:
+ vs->send_hextile_tile = send_hextile_tile_16;
+ break;
+ case 32:
+ vs->send_hextile_tile = send_hextile_tile_32;
+ break;
+ }
+ } else {
+ switch (vs->ds->surface->pf.bits_per_pixel) {
+ case 8:
+ vs->send_hextile_tile = send_hextile_tile_generic_8;
+ break;
+ case 16:
+ vs->send_hextile_tile = send_hextile_tile_generic_16;
+ break;
+ case 32:
+ vs->send_hextile_tile = send_hextile_tile_generic_32;
+ break;
+ }
+ }
+}
diff --git a/ui/vnc-enc-tight.c b/ui/vnc-enc-tight.c
new file mode 100644
index 0000000..82dd3b8
--- /dev/null
+++ b/ui/vnc-enc-tight.c
@@ -0,0 +1,1522 @@
+/*
+ * QEMU VNC display driver: tight encoding
+ *
+ * From libvncserver/libvncserver/tight.c
+ * Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved.
+ * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
+ *
+ * Copyright (C) 2010 Corentin Chary <corentin.chary@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#include "qemu-common.h"
+
+#ifdef CONFIG_VNC_JPEG
+#include <stdio.h>
+#include <jpeglib.h>
+#endif
+#include <stdbool.h>
+
+#include "bswap.h"
+#include "qdict.h"
+#include "qint.h"
+#include "vnc.h"
+#include "vnc-enc-tight.h"
+
+/* Compression level stuff. The following array contains various
+ encoder parameters for each of 10 compression levels (0..9).
+ Last three parameters correspond to JPEG quality levels (0..9). */
+
+static const struct {
+ int max_rect_size, max_rect_width;
+ int mono_min_rect_size, gradient_min_rect_size;
+ int idx_zlib_level, mono_zlib_level, raw_zlib_level, gradient_zlib_level;
+ int gradient_threshold, gradient_threshold24;
+ int idx_max_colors_divisor;
+ int jpeg_quality, jpeg_threshold, jpeg_threshold24;
+} tight_conf[] = {
+ { 512, 32, 6, 65536, 0, 0, 0, 0, 0, 0, 4, 5, 10000, 23000 },
+ { 2048, 128, 6, 65536, 1, 1, 1, 0, 0, 0, 8, 10, 8000, 18000 },
+ { 6144, 256, 8, 65536, 3, 3, 2, 0, 0, 0, 24, 15, 6500, 15000 },
+ { 10240, 1024, 12, 65536, 5, 5, 3, 0, 0, 0, 32, 25, 5000, 12000 },
+ { 16384, 2048, 12, 65536, 6, 6, 4, 0, 0, 0, 32, 37, 4000, 10000 },
+ { 32768, 2048, 12, 4096, 7, 7, 5, 4, 150, 380, 32, 50, 3000, 8000 },
+ { 65536, 2048, 16, 4096, 7, 7, 6, 4, 170, 420, 48, 60, 2000, 5000 },
+ { 65536, 2048, 16, 4096, 8, 8, 7, 5, 180, 450, 64, 70, 1000, 2500 },
+ { 65536, 2048, 32, 8192, 9, 9, 8, 6, 190, 475, 64, 75, 500, 1200 },
+ { 65536, 2048, 32, 8192, 9, 9, 9, 6, 200, 500, 96, 80, 200, 500 }
+};
+
+/*
+ * Code to guess if given rectangle is suitable for smooth image
+ * compression (by applying "gradient" filter or JPEG coder).
+ */
+
+static uint
+tight_detect_smooth_image24(VncState *vs, int w, int h)
+{
+ int off;
+ int x, y, d, dx;
+ uint c;
+ uint stats[256];
+ int pixels = 0;
+ int pix, left[3];
+ uint errors;
+ unsigned char *buf = vs->tight.buffer;
+
+ /*
+ * If client is big-endian, color samples begin from the second
+ * byte (offset 1) of a 32-bit pixel value.
+ */
+ off = !!(vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG);
+
+ memset(stats, 0, sizeof (stats));
+
+ for (y = 0, x = 0; y < h && x < w;) {
+ for (d = 0; d < h - y && d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH;
+ d++) {
+ for (c = 0; c < 3; c++) {
+ left[c] = buf[((y+d)*w+x+d)*4+off+c] & 0xFF;
+ }
+ for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; dx++) {
+ for (c = 0; c < 3; c++) {
+ pix = buf[((y+d)*w+x+d+dx)*4+off+c] & 0xFF;
+ stats[abs(pix - left[c])]++;
+ left[c] = pix;
+ }
+ pixels++;
+ }
+ }
+ if (w > h) {
+ x += h;
+ y = 0;
+ } else {
+ x = 0;
+ y += w;
+ }
+ }
+
+ /* 95% smooth or more ... */
+ if (stats[0] * 33 / pixels >= 95) {
+ return 0;
+ }
+
+ errors = 0;
+ for (c = 1; c < 8; c++) {
+ errors += stats[c] * (c * c);
+ if (stats[c] == 0 || stats[c] > stats[c-1] * 2) {
+ return 0;
+ }
+ }
+ for (; c < 256; c++) {
+ errors += stats[c] * (c * c);
+ }
+ errors /= (pixels * 3 - stats[0]);
+
+ return errors;
+}
+
+#define DEFINE_DETECT_FUNCTION(bpp) \
+ \
+ static uint \
+ tight_detect_smooth_image##bpp(VncState *vs, int w, int h) { \
+ bool endian; \
+ uint##bpp##_t pix; \
+ int max[3], shift[3]; \
+ int x, y, d, dx; \
+ uint c; \
+ uint stats[256]; \
+ int pixels = 0; \
+ int sample, sum, left[3]; \
+ uint errors; \
+ unsigned char *buf = vs->tight.buffer; \
+ \
+ endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \
+ (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \
+ \
+ \
+ max[0] = vs->clientds.pf.rmax; \
+ max[1] = vs->clientds.pf.gmax; \
+ max[2] = vs->clientds.pf.bmax; \
+ shift[0] = vs->clientds.pf.rshift; \
+ shift[1] = vs->clientds.pf.gshift; \
+ shift[2] = vs->clientds.pf.bshift; \
+ \
+ memset(stats, 0, sizeof(stats)); \
+ \
+ y = 0, x = 0; \
+ while (y < h && x < w) { \
+ for (d = 0; d < h - y && \
+ d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; d++) { \
+ pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d]; \
+ if (endian) { \
+ pix = bswap_##bpp(pix); \
+ } \
+ for (c = 0; c < 3; c++) { \
+ left[c] = (int)(pix >> shift[c] & max[c]); \
+ } \
+ for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; \
+ dx++) { \
+ pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d+dx]; \
+ if (endian) { \
+ pix = bswap_##bpp(pix); \
+ } \
+ sum = 0; \
+ for (c = 0; c < 3; c++) { \
+ sample = (int)(pix >> shift[c] & max[c]); \
+ sum += abs(sample - left[c]); \
+ left[c] = sample; \
+ } \
+ if (sum > 255) { \
+ sum = 255; \
+ } \
+ stats[sum]++; \
+ pixels++; \
+ } \
+ } \
+ if (w > h) { \
+ x += h; \
+ y = 0; \
+ } else { \
+ x = 0; \
+ y += w; \
+ } \
+ } \
+ \
+ if ((stats[0] + stats[1]) * 100 / pixels >= 90) { \
+ return 0; \
+ } \
+ \
+ errors = 0; \
+ for (c = 1; c < 8; c++) { \
+ errors += stats[c] * (c * c); \
+ if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { \
+ return 0; \
+ } \
+ } \
+ for (; c < 256; c++) { \
+ errors += stats[c] * (c * c); \
+ } \
+ errors /= (pixels - stats[0]); \
+ \
+ return errors; \
+ }
+
+DEFINE_DETECT_FUNCTION(16)
+DEFINE_DETECT_FUNCTION(32)
+
+static int
+tight_detect_smooth_image(VncState *vs, int w, int h)
+{
+ uint errors;
+ int compression = vs->tight_compression;
+ int quality = vs->tight_quality;
+
+ if (vs->vd->lossless) {
+ return 0;
+ }
+
+ if (ds_get_bytes_per_pixel(vs->ds) == 1 ||
+ vs->clientds.pf.bytes_per_pixel == 1 ||
+ w < VNC_TIGHT_DETECT_MIN_WIDTH || h < VNC_TIGHT_DETECT_MIN_HEIGHT) {
+ return 0;
+ }
+
+ if (vs->tight_quality != -1) {
+ if (w * h < VNC_TIGHT_JPEG_MIN_RECT_SIZE) {
+ return 0;
+ }
+ } else {
+ if (w * h < tight_conf[compression].gradient_min_rect_size) {
+ return 0;
+ }
+ }
+
+ if (vs->clientds.pf.bytes_per_pixel == 4) {
+ if (vs->tight_pixel24) {
+ errors = tight_detect_smooth_image24(vs, w, h);
+ if (vs->tight_quality != -1) {
+ return (errors < tight_conf[quality].jpeg_threshold24);
+ }
+ return (errors < tight_conf[compression].gradient_threshold24);
+ } else {
+ errors = tight_detect_smooth_image32(vs, w, h);
+ }
+ } else {
+ errors = tight_detect_smooth_image16(vs, w, h);
+ }
+ if (quality != -1) {
+ return (errors < tight_conf[quality].jpeg_threshold);
+ }
+ return (errors < tight_conf[compression].gradient_threshold);
+}
+
+/*
+ * Code to determine how many different colors used in rectangle.
+ */
+
+static void tight_palette_rgb2buf(uint32_t rgb, int bpp, uint8_t buf[6])
+{
+ memset(buf, 0, 6);
+
+ if (bpp == 32) {
+ buf[0] = ((rgb >> 24) & 0xFF);
+ buf[1] = ((rgb >> 16) & 0xFF);
+ buf[2] = ((rgb >> 8) & 0xFF);
+ buf[3] = ((rgb >> 0) & 0xFF);
+ buf[4] = ((buf[0] & 1) == 0) << 3 | ((buf[1] & 1) == 0) << 2;
+ buf[4]|= ((buf[2] & 1) == 0) << 1 | ((buf[3] & 1) == 0) << 0;
+ buf[0] |= 1;
+ buf[1] |= 1;
+ buf[2] |= 1;
+ buf[3] |= 1;
+ }
+ if (bpp == 16) {
+ buf[0] = ((rgb >> 8) & 0xFF);
+ buf[1] = ((rgb >> 0) & 0xFF);
+ buf[2] = ((buf[0] & 1) == 0) << 1 | ((buf[1] & 1) == 0) << 0;
+ buf[0] |= 1;
+ buf[1] |= 1;
+ }
+}
+
+static uint32_t tight_palette_buf2rgb(int bpp, const uint8_t *buf)
+{
+ uint32_t rgb = 0;
+
+ if (bpp == 32) {
+ rgb |= ((buf[0] & ~1) | !((buf[4] >> 3) & 1)) << 24;
+ rgb |= ((buf[1] & ~1) | !((buf[4] >> 2) & 1)) << 16;
+ rgb |= ((buf[2] & ~1) | !((buf[4] >> 1) & 1)) << 8;
+ rgb |= ((buf[3] & ~1) | !((buf[4] >> 0) & 1)) << 0;
+ }
+ if (bpp == 16) {
+ rgb |= ((buf[0] & ~1) | !((buf[2] >> 1) & 1)) << 8;
+ rgb |= ((buf[1] & ~1) | !((buf[2] >> 0) & 1)) << 0;
+ }
+ return rgb;
+}
+
+
+static int tight_palette_insert(QDict *palette, uint32_t rgb, int bpp, int max)
+{
+ uint8_t key[6];
+ int idx = qdict_size(palette);
+ bool present;
+
+ tight_palette_rgb2buf(rgb, bpp, key);
+ present = qdict_haskey(palette, (char *)key);
+ if (idx >= max && !present) {
+ return 0;
+ }
+ if (!present) {
+ qdict_put(palette, (char *)key, qint_from_int(idx));
+ }
+ return qdict_size(palette);
+}
+
+#define DEFINE_FILL_PALETTE_FUNCTION(bpp) \
+ \
+ static int \
+ tight_fill_palette##bpp(VncState *vs, int x, int y, \
+ int max, size_t count, \
+ uint32_t *bg, uint32_t *fg, \
+ struct QDict **palette) { \
+ uint##bpp##_t *data; \
+ uint##bpp##_t c0, c1, ci; \
+ int i, n0, n1; \
+ \
+ data = (uint##bpp##_t *)vs->tight.buffer; \
+ \
+ c0 = data[0]; \
+ i = 1; \
+ while (i < count && data[i] == c0) \
+ i++; \
+ if (i >= count) { \
+ *bg = *fg = c0; \
+ return 1; \
+ } \
+ \
+ if (max < 2) { \
+ return 0; \
+ } \
+ \
+ n0 = i; \
+ c1 = data[i]; \
+ n1 = 0; \
+ for (i++; i < count; i++) { \
+ ci = data[i]; \
+ if (ci == c0) { \
+ n0++; \
+ } else if (ci == c1) { \
+ n1++; \
+ } else \
+ break; \
+ } \
+ if (i >= count) { \
+ if (n0 > n1) { \
+ *bg = (uint32_t)c0; \
+ *fg = (uint32_t)c1; \
+ } else { \
+ *bg = (uint32_t)c1; \
+ *fg = (uint32_t)c0; \
+ } \
+ return 2; \
+ } \
+ \
+ if (max == 2) { \
+ return 0; \
+ } \
+ \
+ *palette = qdict_new(); \
+ tight_palette_insert(*palette, c0, bpp, max); \
+ tight_palette_insert(*palette, c1, bpp, max); \
+ tight_palette_insert(*palette, ci, bpp, max); \
+ \
+ for (i++; i < count; i++) { \
+ if (data[i] == ci) { \
+ continue; \
+ } else { \
+ if (!tight_palette_insert(*palette, (uint32_t)ci, \
+ bpp, max)) { \
+ return 0; \
+ } \
+ ci = data[i]; \
+ } \
+ } \
+ \
+ return qdict_size(*palette); \
+ }
+
+DEFINE_FILL_PALETTE_FUNCTION(8)
+DEFINE_FILL_PALETTE_FUNCTION(16)
+DEFINE_FILL_PALETTE_FUNCTION(32)
+
+static int tight_fill_palette(VncState *vs, int x, int y,
+ size_t count, uint32_t *bg, uint32_t *fg,
+ struct QDict **palette)
+{
+ int max;
+
+ max = count / tight_conf[vs->tight_compression].idx_max_colors_divisor;
+ if (max < 2 &&
+ count >= tight_conf[vs->tight_compression].mono_min_rect_size) {
+ max = 2;
+ }
+ if (max >= 256) {
+ max = 256;
+ }
+
+ switch(vs->clientds.pf.bytes_per_pixel) {
+ case 4:
+ return tight_fill_palette32(vs, x, y, max, count, bg, fg, palette);
+ case 2:
+ return tight_fill_palette16(vs, x, y, max, count, bg, fg, palette);
+ default:
+ max = 2;
+ return tight_fill_palette8(vs, x, y, max, count, bg, fg, palette);
+ }
+ return 0;
+}
+
+/* Callback to dump a palette with qdict_iter
+static void print_palette(const char *key, QObject *obj, void *opaque)
+{
+ uint8_t idx = qint_get_int(qobject_to_qint(obj));
+ uint32_t rgb = tight_palette_buf2rgb(32, (uint8_t *)key);
+
+ fprintf(stderr, "%.2x ", (unsigned char)*key);
+ while (*key++)
+ fprintf(stderr, "%.2x ", (unsigned char)*key);
+
+ fprintf(stderr, ": idx: %x rgb: %x\n", idx, rgb);
+}
+*/
+
+/*
+ * Converting truecolor samples into palette indices.
+ */
+#define DEFINE_IDX_ENCODE_FUNCTION(bpp) \
+ \
+ static void \
+ tight_encode_indexed_rect##bpp(uint8_t *buf, int count, \
+ struct QDict *palette) { \
+ uint##bpp##_t *src; \
+ uint##bpp##_t rgb; \
+ uint8_t key[6]; \
+ int i = 0, rep = 0; \
+ uint8_t idx; \
+ \
+ src = (uint##bpp##_t *) buf; \
+ \
+ for (i = 0; i < count; i++) { \
+ rgb = *src++; \
+ rep = 0; \
+ while (i < count && *src == rgb) { \
+ rep++, src++, i++; \
+ } \
+ tight_palette_rgb2buf(rgb, bpp, key); \
+ if (!qdict_haskey(palette, (char *)key)) { \
+ /* \
+ * Should never happen, but don't break everything \
+ * if it does, use the first color instead \
+ */ \
+ idx = 0; \
+ } else { \
+ idx = qdict_get_int(palette, (char *)key); \
+ } \
+ while (rep >= 0) { \
+ *buf++ = idx; \
+ rep--; \
+ } \
+ } \
+ }
+
+DEFINE_IDX_ENCODE_FUNCTION(16)
+DEFINE_IDX_ENCODE_FUNCTION(32)
+
+#define DEFINE_MONO_ENCODE_FUNCTION(bpp) \
+ \
+ static void \
+ tight_encode_mono_rect##bpp(uint8_t *buf, int w, int h, \
+ uint##bpp##_t bg, uint##bpp##_t fg) { \
+ uint##bpp##_t *ptr; \
+ unsigned int value, mask; \
+ int aligned_width; \
+ int x, y, bg_bits; \
+ \
+ ptr = (uint##bpp##_t *) buf; \
+ aligned_width = w - w % 8; \
+ \
+ for (y = 0; y < h; y++) { \
+ for (x = 0; x < aligned_width; x += 8) { \
+ for (bg_bits = 0; bg_bits < 8; bg_bits++) { \
+ if (*ptr++ != bg) { \
+ break; \
+ } \
+ } \
+ if (bg_bits == 8) { \
+ *buf++ = 0; \
+ continue; \
+ } \
+ mask = 0x80 >> bg_bits; \
+ value = mask; \
+ for (bg_bits++; bg_bits < 8; bg_bits++) { \
+ mask >>= 1; \
+ if (*ptr++ != bg) { \
+ value |= mask; \
+ } \
+ } \
+ *buf++ = (uint8_t)value; \
+ } \
+ \
+ mask = 0x80; \
+ value = 0; \
+ if (x >= w) { \
+ continue; \
+ } \
+ \
+ for (; x < w; x++) { \
+ if (*ptr++ != bg) { \
+ value |= mask; \
+ } \
+ mask >>= 1; \
+ } \
+ *buf++ = (uint8_t)value; \
+ } \
+ }
+
+DEFINE_MONO_ENCODE_FUNCTION(8)
+DEFINE_MONO_ENCODE_FUNCTION(16)
+DEFINE_MONO_ENCODE_FUNCTION(32)
+
+/*
+ * ``Gradient'' filter for 24-bit color samples.
+ * Should be called only when redMax, greenMax and blueMax are 255.
+ * Color components assumed to be byte-aligned.
+ */
+
+static void
+tight_filter_gradient24(VncState *vs, uint8_t *buf, int w, int h)
+{
+ uint32_t *buf32;
+ uint32_t pix32;
+ int shift[3];
+ int *prev;
+ int here[3], upper[3], left[3], upperleft[3];
+ int prediction;
+ int x, y, c;
+
+ buf32 = (uint32_t *)buf;
+ memset(vs->tight_gradient.buffer, 0, w * 3 * sizeof(int));
+
+ if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
+ (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
+ shift[0] = vs->clientds.pf.rshift;
+ shift[1] = vs->clientds.pf.gshift;
+ shift[2] = vs->clientds.pf.bshift;
+ } else {
+ shift[0] = 24 - vs->clientds.pf.rshift;
+ shift[1] = 24 - vs->clientds.pf.gshift;
+ shift[2] = 24 - vs->clientds.pf.bshift;
+ }
+
+ for (y = 0; y < h; y++) {
+ for (c = 0; c < 3; c++) {
+ upper[c] = 0;
+ here[c] = 0;
+ }
+ prev = (int *)vs->tight_gradient.buffer;
+ for (x = 0; x < w; x++) {
+ pix32 = *buf32++;
+ for (c = 0; c < 3; c++) {
+ upperleft[c] = upper[c];
+ left[c] = here[c];
+ upper[c] = *prev;
+ here[c] = (int)(pix32 >> shift[c] & 0xFF);
+ *prev++ = here[c];
+
+ prediction = left[c] + upper[c] - upperleft[c];
+ if (prediction < 0) {
+ prediction = 0;
+ } else if (prediction > 0xFF) {
+ prediction = 0xFF;
+ }
+ *buf++ = (char)(here[c] - prediction);
+ }
+ }
+ }
+}
+
+
+/*
+ * ``Gradient'' filter for other color depths.
+ */
+
+#define DEFINE_GRADIENT_FILTER_FUNCTION(bpp) \
+ \
+ static void \
+ tight_filter_gradient##bpp(VncState *vs, uint##bpp##_t *buf, \
+ int w, int h) { \
+ uint##bpp##_t pix, diff; \
+ bool endian; \
+ int *prev; \
+ int max[3], shift[3]; \
+ int here[3], upper[3], left[3], upperleft[3]; \
+ int prediction; \
+ int x, y, c; \
+ \
+ memset (vs->tight_gradient.buffer, 0, w * 3 * sizeof(int)); \
+ \
+ endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \
+ (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \
+ \
+ max[0] = vs->clientds.pf.rmax; \
+ max[1] = vs->clientds.pf.gmax; \
+ max[2] = vs->clientds.pf.bmax; \
+ shift[0] = vs->clientds.pf.rshift; \
+ shift[1] = vs->clientds.pf.gshift; \
+ shift[2] = vs->clientds.pf.bshift; \
+ \
+ for (y = 0; y < h; y++) { \
+ for (c = 0; c < 3; c++) { \
+ upper[c] = 0; \
+ here[c] = 0; \
+ } \
+ prev = (int *)vs->tight_gradient.buffer; \
+ for (x = 0; x < w; x++) { \
+ pix = *buf; \
+ if (endian) { \
+ pix = bswap_##bpp(pix); \
+ } \
+ diff = 0; \
+ for (c = 0; c < 3; c++) { \
+ upperleft[c] = upper[c]; \
+ left[c] = here[c]; \
+ upper[c] = *prev; \
+ here[c] = (int)(pix >> shift[c] & max[c]); \
+ *prev++ = here[c]; \
+ \
+ prediction = left[c] + upper[c] - upperleft[c]; \
+ if (prediction < 0) { \
+ prediction = 0; \
+ } else if (prediction > max[c]) { \
+ prediction = max[c]; \
+ } \
+ diff |= ((here[c] - prediction) & max[c]) \
+ << shift[c]; \
+ } \
+ if (endian) { \
+ diff = bswap_##bpp(diff); \
+ } \
+ *buf++ = diff; \
+ } \
+ } \
+ }
+
+DEFINE_GRADIENT_FILTER_FUNCTION(16)
+DEFINE_GRADIENT_FILTER_FUNCTION(32)
+
+/*
+ * Check if a rectangle is all of the same color. If needSameColor is
+ * set to non-zero, then also check that its color equals to the
+ * *colorPtr value. The result is 1 if the test is successfull, and in
+ * that case new color will be stored in *colorPtr.
+ */
+
+#define DEFINE_CHECK_SOLID_FUNCTION(bpp) \
+ \
+ static bool \
+ check_solid_tile##bpp(VncState *vs, int x, int y, int w, int h, \
+ uint32_t* color, bool samecolor) \
+ { \
+ VncDisplay *vd = vs->vd; \
+ uint##bpp##_t *fbptr; \
+ uint##bpp##_t c; \
+ int dx, dy; \
+ \
+ fbptr = (uint##bpp##_t *) \
+ (vd->server->data + y * ds_get_linesize(vs->ds) + \
+ x * ds_get_bytes_per_pixel(vs->ds)); \
+ \
+ c = *fbptr; \
+ if (samecolor && (uint32_t)c != *color) { \
+ return false; \
+ } \
+ \
+ for (dy = 0; dy < h; dy++) { \
+ for (dx = 0; dx < w; dx++) { \
+ if (c != fbptr[dx]) { \
+ return false; \
+ } \
+ } \
+ fbptr = (uint##bpp##_t *) \
+ ((uint8_t *)fbptr + ds_get_linesize(vs->ds)); \
+ } \
+ \
+ *color = (uint32_t)c; \
+ return true; \
+ }
+
+DEFINE_CHECK_SOLID_FUNCTION(32)
+DEFINE_CHECK_SOLID_FUNCTION(16)
+DEFINE_CHECK_SOLID_FUNCTION(8)
+
+static bool check_solid_tile(VncState *vs, int x, int y, int w, int h,
+ uint32_t* color, bool samecolor)
+{
+ VncDisplay *vd = vs->vd;
+
+ switch(vd->server->pf.bytes_per_pixel) {
+ case 4:
+ return check_solid_tile32(vs, x, y, w, h, color, samecolor);
+ case 2:
+ return check_solid_tile16(vs, x, y, w, h, color, samecolor);
+ default:
+ return check_solid_tile8(vs, x, y, w, h, color, samecolor);
+ }
+}
+
+static void find_best_solid_area(VncState *vs, int x, int y, int w, int h,
+ uint32_t color, int *w_ptr, int *h_ptr)
+{
+ int dx, dy, dw, dh;
+ int w_prev;
+ int w_best = 0, h_best = 0;
+
+ w_prev = w;
+
+ for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
+
+ dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, y + h - dy);
+ dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, w_prev);
+
+ if (!check_solid_tile(vs, x, dy, dw, dh, &color, true)) {
+ break;
+ }
+
+ for (dx = x + dw; dx < x + w_prev;) {
+ dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, x + w_prev - dx);
+
+ if (!check_solid_tile(vs, dx, dy, dw, dh, &color, true)) {
+ break;
+ }
+ dx += dw;
+ }
+
+ w_prev = dx - x;
+ if (w_prev * (dy + dh - y) > w_best * h_best) {
+ w_best = w_prev;
+ h_best = dy + dh - y;
+ }
+ }
+
+ *w_ptr = w_best;
+ *h_ptr = h_best;
+}
+
+static void extend_solid_area(VncState *vs, int x, int y, int w, int h,
+ uint32_t color, int *x_ptr, int *y_ptr,
+ int *w_ptr, int *h_ptr)
+{
+ int cx, cy;
+
+ /* Try to extend the area upwards. */
+ for ( cy = *y_ptr - 1;
+ cy >= y && check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
+ cy-- );
+ *h_ptr += *y_ptr - (cy + 1);
+ *y_ptr = cy + 1;
+
+ /* ... downwards. */
+ for ( cy = *y_ptr + *h_ptr;
+ cy < y + h &&
+ check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
+ cy++ );
+ *h_ptr += cy - (*y_ptr + *h_ptr);
+
+ /* ... to the left. */
+ for ( cx = *x_ptr - 1;
+ cx >= x && check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
+ cx-- );
+ *w_ptr += *x_ptr - (cx + 1);
+ *x_ptr = cx + 1;
+
+ /* ... to the right. */
+ for ( cx = *x_ptr + *w_ptr;
+ cx < x + w &&
+ check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
+ cx++ );
+ *w_ptr += cx - (*x_ptr + *w_ptr);
+}
+
+static int tight_init_stream(VncState *vs, int stream_id,
+ int level, int strategy)
+{
+ z_streamp zstream = &vs->tight_stream[stream_id];
+
+ if (zstream->opaque == NULL) {
+ int err;
+
+ VNC_DEBUG("VNC: TIGHT: initializing zlib stream %d\n", stream_id);
+ VNC_DEBUG("VNC: TIGHT: opaque = %p | vs = %p\n", zstream->opaque, vs);
+ zstream->zalloc = vnc_zlib_zalloc;
+ zstream->zfree = vnc_zlib_zfree;
+
+ err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS,
+ MAX_MEM_LEVEL, strategy);
+
+ if (err != Z_OK) {
+ fprintf(stderr, "VNC: error initializing zlib\n");
+ return -1;
+ }
+
+ vs->tight_levels[stream_id] = level;
+ zstream->opaque = vs;
+ }
+
+ if (vs->tight_levels[stream_id] != level) {
+ if (deflateParams(zstream, level, strategy) != Z_OK) {
+ return -1;
+ }
+ vs->tight_levels[stream_id] = level;
+ }
+ return 0;
+}
+
+static void tight_send_compact_size(VncState *vs, size_t len)
+{
+ int lpc = 0;
+ int bytes = 0;
+ char buf[3] = {0, 0, 0};
+
+ buf[bytes++] = len & 0x7F;
+ if (len > 0x7F) {
+ buf[bytes-1] |= 0x80;
+ buf[bytes++] = (len >> 7) & 0x7F;
+ if (len > 0x3FFF) {
+ buf[bytes-1] |= 0x80;
+ buf[bytes++] = (len >> 14) & 0xFF;
+ }
+ }
+ for (lpc = 0; lpc < bytes; lpc++) {
+ vnc_write_u8(vs, buf[lpc]);
+ }
+}
+
+static int tight_compress_data(VncState *vs, int stream_id, size_t bytes,
+ int level, int strategy)
+{
+ z_streamp zstream = &vs->tight_stream[stream_id];
+ int previous_out;
+
+ if (bytes < VNC_TIGHT_MIN_TO_COMPRESS) {
+ vnc_write(vs, vs->tight.buffer, vs->tight.offset);
+ return bytes;
+ }
+
+ if (tight_init_stream(vs, stream_id, level, strategy)) {
+ return -1;
+ }
+
+ /* reserve memory in output buffer */
+ buffer_reserve(&vs->tight_zlib, bytes + 64);
+
+ /* set pointers */
+ zstream->next_in = vs->tight.buffer;
+ zstream->avail_in = vs->tight.offset;
+ zstream->next_out = vs->tight_zlib.buffer + vs->tight_zlib.offset;
+ zstream->avail_out = vs->tight_zlib.capacity - vs->tight_zlib.offset;
+ zstream->data_type = Z_BINARY;
+ previous_out = zstream->total_out;
+
+ /* start encoding */
+ if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
+ fprintf(stderr, "VNC: error during tight compression\n");
+ return -1;
+ }
+
+ vs->tight_zlib.offset = vs->tight_zlib.capacity - zstream->avail_out;
+ bytes = zstream->total_out - previous_out;
+
+ tight_send_compact_size(vs, bytes);
+ vnc_write(vs, vs->tight_zlib.buffer, bytes);
+
+ buffer_reset(&vs->tight_zlib);
+
+ return bytes;
+}
+
+/*
+ * Subencoding implementations.
+ */
+static void tight_pack24(VncState *vs, uint8_t *buf, size_t count, size_t *ret)
+{
+ uint32_t *buf32;
+ uint32_t pix;
+ int rshift, gshift, bshift;
+
+ buf32 = (uint32_t *)buf;
+
+ if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
+ (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
+ rshift = vs->clientds.pf.rshift;
+ gshift = vs->clientds.pf.gshift;
+ bshift = vs->clientds.pf.bshift;
+ } else {
+ rshift = 24 - vs->clientds.pf.rshift;
+ gshift = 24 - vs->clientds.pf.gshift;
+ bshift = 24 - vs->clientds.pf.bshift;
+ }
+
+ if (ret) {
+ *ret = count * 3;
+ }
+
+ while (count--) {
+ pix = *buf32++;
+ *buf++ = (char)(pix >> rshift);
+ *buf++ = (char)(pix >> gshift);
+ *buf++ = (char)(pix >> bshift);
+ }
+}
+
+static int send_full_color_rect(VncState *vs, int w, int h)
+{
+ int stream = 0;
+ size_t bytes;
+
+ vnc_write_u8(vs, stream << 4); /* no flushing, no filter */
+
+ if (vs->tight_pixel24) {
+ tight_pack24(vs, vs->tight.buffer, w * h, &vs->tight.offset);
+ bytes = 3;
+ } else {
+ bytes = vs->clientds.pf.bytes_per_pixel;
+ }
+
+ bytes = tight_compress_data(vs, stream, w * h * bytes,
+ tight_conf[vs->tight_compression].raw_zlib_level,
+ Z_DEFAULT_STRATEGY);
+
+ return (bytes >= 0);
+}
+
+static int send_solid_rect(VncState *vs)
+{
+ size_t bytes;
+
+ vnc_write_u8(vs, VNC_TIGHT_FILL << 4); /* no flushing, no filter */
+
+ if (vs->tight_pixel24) {
+ tight_pack24(vs, vs->tight.buffer, 1, &vs->tight.offset);
+ bytes = 3;
+ } else {
+ bytes = vs->clientds.pf.bytes_per_pixel;
+ }
+
+ vnc_write(vs, vs->tight.buffer, bytes);
+ return 1;
+}
+
+static int send_mono_rect(VncState *vs, int w, int h, uint32_t bg, uint32_t fg)
+{
+ size_t bytes;
+ int stream = 1;
+ int level = tight_conf[vs->tight_compression].mono_zlib_level;
+
+ bytes = ((w + 7) / 8) * h;
+
+ vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
+ vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
+ vnc_write_u8(vs, 1);
+
+ switch(vs->clientds.pf.bytes_per_pixel) {
+ case 4:
+ {
+ uint32_t buf[2] = {bg, fg};
+ size_t ret = sizeof (buf);
+
+ if (vs->tight_pixel24) {
+ tight_pack24(vs, (unsigned char*)buf, 2, &ret);
+ }
+ vnc_write(vs, buf, ret);
+
+ tight_encode_mono_rect32(vs->tight.buffer, w, h, bg, fg);
+ break;
+ }
+ case 2:
+ vnc_write(vs, &bg, 2);
+ vnc_write(vs, &fg, 2);
+ tight_encode_mono_rect16(vs->tight.buffer, w, h, bg, fg);
+ break;
+ default:
+ vnc_write_u8(vs, bg);
+ vnc_write_u8(vs, fg);
+ tight_encode_mono_rect8(vs->tight.buffer, w, h, bg, fg);
+ break;
+ }
+ vs->tight.offset = bytes;
+
+ bytes = tight_compress_data(vs, stream, bytes, level, Z_DEFAULT_STRATEGY);
+ return (bytes >= 0);
+}
+
+struct palette_cb_priv {
+ VncState *vs;
+ uint8_t *header;
+};
+
+static void write_palette(const char *key, QObject *obj, void *opaque)
+{
+ struct palette_cb_priv *priv = opaque;
+ VncState *vs = priv->vs;
+ uint32_t bytes = vs->clientds.pf.bytes_per_pixel;
+ uint8_t idx = qint_get_int(qobject_to_qint(obj));
+
+ if (bytes == 4) {
+ uint32_t color = tight_palette_buf2rgb(32, (uint8_t *)key);
+
+ ((uint32_t*)priv->header)[idx] = color;
+ } else {
+ uint16_t color = tight_palette_buf2rgb(16, (uint8_t *)key);
+
+ ((uint16_t*)priv->header)[idx] = color;
+ }
+}
+
+static bool send_gradient_rect(VncState *vs, int w, int h)
+{
+ int stream = 3;
+ int level = tight_conf[vs->tight_compression].gradient_zlib_level;
+ size_t bytes;
+
+ if (vs->clientds.pf.bytes_per_pixel == 1)
+ return send_full_color_rect(vs, w, h);
+
+ vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
+ vnc_write_u8(vs, VNC_TIGHT_FILTER_GRADIENT);
+
+ buffer_reserve(&vs->tight_gradient, w * 3 * sizeof (int));
+
+ if (vs->tight_pixel24) {
+ tight_filter_gradient24(vs, vs->tight.buffer, w, h);
+ bytes = 3;
+ } else if (vs->clientds.pf.bytes_per_pixel == 4) {
+ tight_filter_gradient32(vs, (uint32_t *)vs->tight.buffer, w, h);
+ bytes = 4;
+ } else {
+ tight_filter_gradient16(vs, (uint16_t *)vs->tight.buffer, w, h);
+ bytes = 2;
+ }
+
+ buffer_reset(&vs->tight_gradient);
+
+ bytes = w * h * bytes;
+ vs->tight.offset = bytes;
+
+ bytes = tight_compress_data(vs, stream, bytes,
+ level, Z_FILTERED);
+ return (bytes >= 0);
+}
+
+static int send_palette_rect(VncState *vs, int w, int h, struct QDict *palette)
+{
+ int stream = 2;
+ int level = tight_conf[vs->tight_compression].idx_zlib_level;
+ int colors;
+ size_t bytes;
+
+ colors = qdict_size(palette);
+
+ vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
+ vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
+ vnc_write_u8(vs, colors - 1);
+
+ switch(vs->clientds.pf.bytes_per_pixel) {
+ case 4:
+ {
+ size_t old_offset, offset;
+ uint32_t header[qdict_size(palette)];
+ struct palette_cb_priv priv = { vs, (uint8_t *)header };
+
+ old_offset = vs->output.offset;
+ qdict_iter(palette, write_palette, &priv);
+ vnc_write(vs, header, sizeof(header));
+
+ if (vs->tight_pixel24) {
+ tight_pack24(vs, vs->output.buffer + old_offset, colors, &offset);
+ vs->output.offset = old_offset + offset;
+ }
+
+ tight_encode_indexed_rect32(vs->tight.buffer, w * h, palette);
+ break;
+ }
+ case 2:
+ {
+ uint16_t header[qdict_size(palette)];
+ struct palette_cb_priv priv = { vs, (uint8_t *)header };
+
+ qdict_iter(palette, write_palette, &priv);
+ vnc_write(vs, header, sizeof(header));
+ tight_encode_indexed_rect16(vs->tight.buffer, w * h, palette);
+ break;
+ }
+ default:
+ return -1; /* No palette for 8bits colors */
+ break;
+ }
+ bytes = w * h;
+ vs->tight.offset = bytes;
+
+ bytes = tight_compress_data(vs, stream, bytes,
+ level, Z_DEFAULT_STRATEGY);
+ return (bytes >= 0);
+}
+
+/*
+ * JPEG compression stuff.
+ */
+#ifdef CONFIG_VNC_JPEG
+static void jpeg_prepare_row24(VncState *vs, uint8_t *dst, int x, int y,
+ int count)
+{
+ VncDisplay *vd = vs->vd;
+ uint32_t *fbptr;
+ uint32_t pix;
+
+ fbptr = (uint32_t *)(vd->server->data + y * ds_get_linesize(vs->ds) +
+ x * ds_get_bytes_per_pixel(vs->ds));
+
+ while (count--) {
+ pix = *fbptr++;
+ *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.rshift);
+ *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.gshift);
+ *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.bshift);
+ }
+}
+
+#define DEFINE_JPEG_GET_ROW_FUNCTION(bpp) \
+ \
+ static void \
+ jpeg_prepare_row##bpp(VncState *vs, uint8_t *dst, \
+ int x, int y, int count) \
+ { \
+ VncDisplay *vd = vs->vd; \
+ uint##bpp##_t *fbptr; \
+ uint##bpp##_t pix; \
+ int r, g, b; \
+ \
+ fbptr = (uint##bpp##_t *) \
+ (vd->server->data + y * ds_get_linesize(vs->ds) + \
+ x * ds_get_bytes_per_pixel(vs->ds)); \
+ \
+ while (count--) { \
+ pix = *fbptr++; \
+ \
+ r = (int)((pix >> vs->ds->surface->pf.rshift) \
+ & vs->ds->surface->pf.rmax); \
+ g = (int)((pix >> vs->ds->surface->pf.gshift) \
+ & vs->ds->surface->pf.gmax); \
+ b = (int)((pix >> vs->ds->surface->pf.bshift) \
+ & vs->ds->surface->pf.bmax); \
+ \
+ *dst++ = (uint8_t)((r * 255 + vs->ds->surface->pf.rmax / 2) \
+ / vs->ds->surface->pf.rmax); \
+ *dst++ = (uint8_t)((g * 255 + vs->ds->surface->pf.gmax / 2) \
+ / vs->ds->surface->pf.gmax); \
+ *dst++ = (uint8_t)((b * 255 + vs->ds->surface->pf.bmax / 2) \
+ / vs->ds->surface->pf.bmax); \
+ } \
+ }
+
+DEFINE_JPEG_GET_ROW_FUNCTION(16)
+DEFINE_JPEG_GET_ROW_FUNCTION(32)
+
+static void jpeg_prepare_row(VncState *vs, uint8_t *dst, int x, int y,
+ int count)
+{
+ if (vs->tight_pixel24)
+ jpeg_prepare_row24(vs, dst, x, y, count);
+ else if (ds_get_bytes_per_pixel(vs->ds) == 4)
+ jpeg_prepare_row32(vs, dst, x, y, count);
+ else
+ jpeg_prepare_row16(vs, dst, x, y, count);
+}
+
+/*
+ * Destination manager implementation for JPEG library.
+ */
+
+/* This is called once per encoding */
+static void jpeg_init_destination(j_compress_ptr cinfo)
+{
+ VncState *vs = cinfo->client_data;
+ Buffer *buffer = &vs->tight_jpeg;
+
+ cinfo->dest->next_output_byte = (JOCTET *)buffer->buffer + buffer->offset;
+ cinfo->dest->free_in_buffer = (size_t)(buffer->capacity - buffer->offset);
+}
+
+/* This is called when we ran out of buffer (shouldn't happen!) */
+static boolean jpeg_empty_output_buffer(j_compress_ptr cinfo)
+{
+ VncState *vs = cinfo->client_data;
+ Buffer *buffer = &vs->tight_jpeg;
+
+ buffer->offset = buffer->capacity;
+ buffer_reserve(buffer, 2048);
+ jpeg_init_destination(cinfo);
+ return TRUE;
+}
+
+/* This is called when we are done processing data */
+static void jpeg_term_destination(j_compress_ptr cinfo)
+{
+ VncState *vs = cinfo->client_data;
+ Buffer *buffer = &vs->tight_jpeg;
+
+ buffer->offset = buffer->capacity - cinfo->dest->free_in_buffer;
+}
+
+static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality)
+{
+ struct jpeg_compress_struct cinfo;
+ struct jpeg_error_mgr jerr;
+ struct jpeg_destination_mgr manager;
+ JSAMPROW row[1];
+ uint8_t *buf;
+ int dy;
+
+ if (ds_get_bytes_per_pixel(vs->ds) == 1)
+ return send_full_color_rect(vs, w, h);
+
+ buf = qemu_malloc(w * 3);
+ row[0] = buf;
+ buffer_reserve(&vs->tight_jpeg, 2048);
+
+ cinfo.err = jpeg_std_error(&jerr);
+ jpeg_create_compress(&cinfo);
+
+ cinfo.client_data = vs;
+ cinfo.image_width = w;
+ cinfo.image_height = h;
+ cinfo.input_components = 3;
+ cinfo.in_color_space = JCS_RGB;
+
+ jpeg_set_defaults(&cinfo);
+ jpeg_set_quality(&cinfo, quality, true);
+
+ manager.init_destination = jpeg_init_destination;
+ manager.empty_output_buffer = jpeg_empty_output_buffer;
+ manager.term_destination = jpeg_term_destination;
+ cinfo.dest = &manager;
+
+ jpeg_start_compress(&cinfo, true);
+
+ for (dy = 0; dy < h; dy++) {
+ jpeg_prepare_row(vs, buf, x, y + dy, w);
+ jpeg_write_scanlines(&cinfo, row, 1);
+ }
+
+ jpeg_finish_compress(&cinfo);
+ jpeg_destroy_compress(&cinfo);
+
+ vnc_write_u8(vs, VNC_TIGHT_JPEG << 4);
+
+ tight_send_compact_size(vs, vs->tight_jpeg.offset);
+ vnc_write(vs, vs->tight_jpeg.buffer, vs->tight_jpeg.offset);
+ buffer_reset(&vs->tight_jpeg);
+
+ return 1;
+}
+#endif /* CONFIG_VNC_JPEG */
+
+static void vnc_tight_start(VncState *vs)
+{
+ buffer_reset(&vs->tight);
+
+ // make the output buffer be the zlib buffer, so we can compress it later
+ vs->tight_tmp = vs->output;
+ vs->output = vs->tight;
+}
+
+static void vnc_tight_stop(VncState *vs)
+{
+ // switch back to normal output/zlib buffers
+ vs->tight = vs->output;
+ vs->output = vs->tight_tmp;
+}
+
+static int send_sub_rect(VncState *vs, int x, int y, int w, int h)
+{
+ struct QDict *palette = NULL;
+ uint32_t bg = 0, fg = 0;
+ int colors;
+ int ret = 0;
+
+ vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_TIGHT);
+
+ vnc_tight_start(vs);
+ vnc_raw_send_framebuffer_update(vs, x, y, w, h);
+ vnc_tight_stop(vs);
+
+ colors = tight_fill_palette(vs, x, y, w * h, &fg, &bg, &palette);
+
+ if (colors == 0) {
+ if (tight_detect_smooth_image(vs, w, h)) {
+ if (vs->tight_quality == -1) {
+ ret = send_gradient_rect(vs, w, h);
+ } else {
+#ifdef CONFIG_VNC_JPEG
+ int quality = tight_conf[vs->tight_quality].jpeg_quality;
+
+ ret = send_jpeg_rect(vs, x, y, w, h, quality);
+#else
+ ret = send_full_color_rect(vs, w, h);
+#endif
+ }
+ } else {
+ ret = send_full_color_rect(vs, w, h);
+ }
+ } else if (colors == 1) {
+ ret = send_solid_rect(vs);
+ } else if (colors == 2) {
+ ret = send_mono_rect(vs, w, h, bg, fg);
+ } else if (colors <= 256) {
+#ifdef CONFIG_VNC_JPEG
+ if (colors > 96 && vs->tight_quality != -1 && vs->tight_quality <= 3 &&
+ tight_detect_smooth_image(vs, w, h)) {
+ int quality = tight_conf[vs->tight_quality].jpeg_quality;
+
+ ret = send_jpeg_rect(vs, x, y, w, h, quality);
+ } else {
+ ret = send_palette_rect(vs, w, h, palette);
+ }
+#else
+ ret = send_palette_rect(vs, w, h, palette);
+#endif
+ }
+ QDECREF(palette);
+ return ret;
+}
+
+static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h)
+{
+ vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_TIGHT);
+
+ vnc_tight_start(vs);
+ vnc_raw_send_framebuffer_update(vs, x, y, w, h);
+ vnc_tight_stop(vs);
+
+ return send_solid_rect(vs);
+}
+
+static int send_rect_simple(VncState *vs, int x, int y, int w, int h)
+{
+ int max_size, max_width;
+ int max_sub_width, max_sub_height;
+ int dx, dy;
+ int rw, rh;
+ int n = 0;
+
+ max_size = tight_conf[vs->tight_compression].max_rect_size;
+ max_width = tight_conf[vs->tight_compression].max_rect_width;
+
+ if (w > max_width || w * h > max_size) {
+ max_sub_width = (w > max_width) ? max_width : w;
+ max_sub_height = max_size / max_sub_width;
+
+ for (dy = 0; dy < h; dy += max_sub_height) {
+ for (dx = 0; dx < w; dx += max_width) {
+ rw = MIN(max_sub_width, w - dx);
+ rh = MIN(max_sub_height, h - dy);
+ n += send_sub_rect(vs, x+dx, y+dy, rw, rh);
+ }
+ }
+ } else {
+ n += send_sub_rect(vs, x, y, w, h);
+ }
+
+ return n;
+}
+
+static int find_large_solid_color_rect(VncState *vs, int x, int y,
+ int w, int h, int max_rows)
+{
+ int dx, dy, dw, dh;
+ int n = 0;
+
+ /* Try to find large solid-color areas and send them separately. */
+
+ for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
+
+ /* If a rectangle becomes too large, send its upper part now. */
+
+ if (dy - y >= max_rows) {
+ n += send_rect_simple(vs, x, y, w, max_rows);
+ y += max_rows;
+ h -= max_rows;
+ }
+
+ dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (y + h - dy));
+
+ for (dx = x; dx < x + w; dx += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
+ uint32_t color_value;
+ int x_best, y_best, w_best, h_best;
+
+ dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (x + w - dx));
+
+ if (!check_solid_tile(vs, dx, dy, dw, dh, &color_value, false)) {
+ continue ;
+ }
+
+ /* Get dimensions of solid-color area. */
+
+ find_best_solid_area(vs, dx, dy, w - (dx - x), h - (dy - y),
+ color_value, &w_best, &h_best);
+
+ /* Make sure a solid rectangle is large enough
+ (or the whole rectangle is of the same color). */
+
+ if (w_best * h_best != w * h &&
+ w_best * h_best < VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE) {
+ continue;
+ }
+
+ /* Try to extend solid rectangle to maximum size. */
+
+ x_best = dx; y_best = dy;
+ extend_solid_area(vs, x, y, w, h, color_value,
+ &x_best, &y_best, &w_best, &h_best);
+
+ /* Send rectangles at top and left to solid-color area. */
+
+ if (y_best != y) {
+ n += send_rect_simple(vs, x, y, w, y_best-y);
+ }
+ if (x_best != x) {
+ n += vnc_tight_send_framebuffer_update(vs, x, y_best,
+ x_best-x, h_best);
+ }
+
+ /* Send solid-color rectangle. */
+ n += send_sub_rect_solid(vs, x_best, y_best, w_best, h_best);
+
+ /* Send remaining rectangles (at right and bottom). */
+
+ if (x_best + w_best != x + w) {
+ n += vnc_tight_send_framebuffer_update(vs, x_best+w_best,
+ y_best,
+ w-(x_best-x)-w_best,
+ h_best);
+ }
+ if (y_best + h_best != y + h) {
+ n += vnc_tight_send_framebuffer_update(vs, x, y_best+h_best,
+ w, h-(y_best-y)-h_best);
+ }
+
+ /* Return after all recursive calls are done. */
+ return n;
+ }
+ }
+ return n + send_rect_simple(vs, x, y, w, h);
+}
+
+int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y,
+ int w, int h)
+{
+ int max_rows;
+
+ if (vs->clientds.pf.bytes_per_pixel == 4 && vs->clientds.pf.rmax == 0xFF &&
+ vs->clientds.pf.bmax == 0xFF && vs->clientds.pf.gmax == 0xFF) {
+ vs->tight_pixel24 = true;
+ } else {
+ vs->tight_pixel24 = false;
+ }
+
+ if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE)
+ return send_rect_simple(vs, x, y, w, h);
+
+ /* Calculate maximum number of rows in one non-solid rectangle. */
+
+ max_rows = tight_conf[vs->tight_compression].max_rect_size;
+ max_rows /= MIN(tight_conf[vs->tight_compression].max_rect_width, w);
+
+ return find_large_solid_color_rect(vs, x, y, w, h, max_rows);
+}
+
+void vnc_tight_clear(VncState *vs)
+{
+ int i;
+ for (i=0; i<ARRAY_SIZE(vs->tight_stream); i++) {
+ if (vs->tight_stream[i].opaque) {
+ deflateEnd(&vs->tight_stream[i]);
+ }
+ }
+
+ buffer_free(&vs->tight);
+ buffer_free(&vs->tight_zlib);
+ buffer_free(&vs->tight_gradient);
+#ifdef CONFIG_VNC_JPEG
+ buffer_free(&vs->tight_jpeg);
+#endif
+}
diff --git a/ui/vnc-enc-tight.h b/ui/vnc-enc-tight.h
new file mode 100644
index 0000000..9b0910c
--- /dev/null
+++ b/ui/vnc-enc-tight.h
@@ -0,0 +1,181 @@
+/*
+ * QEMU VNC display driver: tight encoding
+ *
+ * From libvncserver/rfb/rfbproto.h
+ * Copyright (C) 2005 Rohit Kumar, Johannes E. Schindelin
+ * Copyright (C) 2000-2002 Constantin Kaplinsky. All Rights Reserved.
+ * Copyright (C) 2000 Tridia Corporation. All Rights Reserved.
+ * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
+ *
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef VNC_ENCODING_TIGHT_H
+#define VNC_ENCODING_TIGHT_H
+
+/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+ * Tight Encoding.
+ *
+ *-- The first byte of each Tight-encoded rectangle is a "compression control
+ * byte". Its format is as follows (bit 0 is the least significant one):
+ *
+ * bit 0: if 1, then compression stream 0 should be reset;
+ * bit 1: if 1, then compression stream 1 should be reset;
+ * bit 2: if 1, then compression stream 2 should be reset;
+ * bit 3: if 1, then compression stream 3 should be reset;
+ * bits 7-4: if 1000 (0x08), then the compression type is "fill",
+ * if 1001 (0x09), then the compression type is "jpeg",
+ * if 0xxx, then the compression type is "basic",
+ * values greater than 1001 are not valid.
+ *
+ * If the compression type is "basic", then bits 6..4 of the
+ * compression control byte (those xxx in 0xxx) specify the following:
+ *
+ * bits 5-4: decimal representation is the index of a particular zlib
+ * stream which should be used for decompressing the data;
+ * bit 6: if 1, then a "filter id" byte is following this byte.
+ *
+ *-- The data that follows after the compression control byte described
+ * above depends on the compression type ("fill", "jpeg" or "basic").
+ *
+ *-- If the compression type is "fill", then the only pixel value follows, in
+ * client pixel format (see NOTE 1). This value applies to all pixels of the
+ * rectangle.
+ *
+ *-- If the compression type is "jpeg", the following data stream looks like
+ * this:
+ *
+ * 1..3 bytes: data size (N) in compact representation;
+ * N bytes: JPEG image.
+ *
+ * Data size is compactly represented in one, two or three bytes, according
+ * to the following scheme:
+ *
+ * 0xxxxxxx (for values 0..127)
+ * 1xxxxxxx 0yyyyyyy (for values 128..16383)
+ * 1xxxxxxx 1yyyyyyy zzzzzzzz (for values 16384..4194303)
+ *
+ * Here each character denotes one bit, xxxxxxx are the least significant 7
+ * bits of the value (bits 0-6), yyyyyyy are bits 7-13, and zzzzzzzz are the
+ * most significant 8 bits (bits 14-21). For example, decimal value 10000
+ * should be represented as two bytes: binary 10010000 01001110, or
+ * hexadecimal 90 4E.
+ *
+ *-- If the compression type is "basic" and bit 6 of the compression control
+ * byte was set to 1, then the next (second) byte specifies "filter id" which
+ * tells the decoder what filter type was used by the encoder to pre-process
+ * pixel data before the compression. The "filter id" byte can be one of the
+ * following:
+ *
+ * 0: no filter ("copy" filter);
+ * 1: "palette" filter;
+ * 2: "gradient" filter.
+ *
+ *-- If bit 6 of the compression control byte is set to 0 (no "filter id"
+ * byte), or if the filter id is 0, then raw pixel values in the client
+ * format (see NOTE 1) will be compressed. See below details on the
+ * compression.
+ *
+ *-- The "gradient" filter pre-processes pixel data with a simple algorithm
+ * which converts each color component to a difference between a "predicted"
+ * intensity and the actual intensity. Such a technique does not affect
+ * uncompressed data size, but helps to compress photo-like images better.
+ * Pseudo-code for converting intensities to differences is the following:
+ *
+ * P[i,j] := V[i-1,j] + V[i,j-1] - V[i-1,j-1];
+ * if (P[i,j] < 0) then P[i,j] := 0;
+ * if (P[i,j] > MAX) then P[i,j] := MAX;
+ * D[i,j] := V[i,j] - P[i,j];
+ *
+ * Here V[i,j] is the intensity of a color component for a pixel at
+ * coordinates (i,j). MAX is the maximum value of intensity for a color
+ * component.
+ *
+ *-- The "palette" filter converts true-color pixel data to indexed colors
+ * and a palette which can consist of 2..256 colors. If the number of colors
+ * is 2, then each pixel is encoded in 1 bit, otherwise 8 bits is used to
+ * encode one pixel. 1-bit encoding is performed such way that the most
+ * significant bits correspond to the leftmost pixels, and each raw of pixels
+ * is aligned to the byte boundary. When "palette" filter is used, the
+ * palette is sent before the pixel data. The palette begins with an unsigned
+ * byte which value is the number of colors in the palette minus 1 (i.e. 1
+ * means 2 colors, 255 means 256 colors in the palette). Then follows the
+ * palette itself which consist of pixel values in client pixel format (see
+ * NOTE 1).
+ *
+ *-- The pixel data is compressed using the zlib library. But if the data
+ * size after applying the filter but before the compression is less then 12,
+ * then the data is sent as is, uncompressed. Four separate zlib streams
+ * (0..3) can be used and the decoder should read the actual stream id from
+ * the compression control byte (see NOTE 2).
+ *
+ * If the compression is not used, then the pixel data is sent as is,
+ * otherwise the data stream looks like this:
+ *
+ * 1..3 bytes: data size (N) in compact representation;
+ * N bytes: zlib-compressed data.
+ *
+ * Data size is compactly represented in one, two or three bytes, just like
+ * in the "jpeg" compression method (see above).
+ *
+ *-- NOTE 1. If the color depth is 24, and all three color components are
+ * 8-bit wide, then one pixel in Tight encoding is always represented by
+ * three bytes, where the first byte is red component, the second byte is
+ * green component, and the third byte is blue component of the pixel color
+ * value. This applies to colors in palettes as well.
+ *
+ *-- NOTE 2. The decoder must reset compression streams' states before
+ * decoding the rectangle, if some of bits 0,1,2,3 in the compression control
+ * byte are set to 1. Note that the decoder must reset zlib streams even if
+ * the compression type is "fill" or "jpeg".
+ *
+ *-- NOTE 3. The "gradient" filter and "jpeg" compression may be used only
+ * when bits-per-pixel value is either 16 or 32, not 8.
+ *
+ *-- NOTE 4. The width of any Tight-encoded rectangle cannot exceed 2048
+ * pixels. If a rectangle is wider, it must be split into several rectangles
+ * and each one should be encoded separately.
+ *
+ */
+
+#define VNC_TIGHT_EXPLICIT_FILTER 0x04
+#define VNC_TIGHT_FILL 0x08
+#define VNC_TIGHT_JPEG 0x09
+#define VNC_TIGHT_MAX_SUBENCODING 0x09
+
+/* Filters to improve compression efficiency */
+#define VNC_TIGHT_FILTER_COPY 0x00
+#define VNC_TIGHT_FILTER_PALETTE 0x01
+#define VNC_TIGHT_FILTER_GRADIENT 0x02
+
+/* Note: The following constant should not be changed. */
+#define VNC_TIGHT_MIN_TO_COMPRESS 12
+
+/* The parameters below may be adjusted. */
+#define VNC_TIGHT_MIN_SPLIT_RECT_SIZE 4096
+#define VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE 2048
+#define VNC_TIGHT_MAX_SPLIT_TILE_SIZE 16
+
+#define VNC_TIGHT_JPEG_MIN_RECT_SIZE 4096
+#define VNC_TIGHT_DETECT_SUBROW_WIDTH 7
+#define VNC_TIGHT_DETECT_MIN_WIDTH 8
+#define VNC_TIGHT_DETECT_MIN_HEIGHT 8
+
+#endif /* VNC_ENCODING_TIGHT_H */
diff --git a/ui/vnc-enc-zlib.c b/ui/vnc-enc-zlib.c
new file mode 100644
index 0000000..a99bc38
--- /dev/null
+++ b/ui/vnc-enc-zlib.c
@@ -0,0 +1,152 @@
+/*
+ * QEMU VNC display driver: zlib encoding
+ *
+ * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
+ * Copyright (C) 2006 Fabrice Bellard
+ * Copyright (C) 2009 Red Hat, Inc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "vnc.h"
+
+#define ZALLOC_ALIGNMENT 16
+
+void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size)
+{
+ void *p;
+
+ size *= items;
+ size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
+
+ p = qemu_mallocz(size);
+
+ return (p);
+}
+
+void vnc_zlib_zfree(void *x, void *addr)
+{
+ qemu_free(addr);
+}
+
+static void vnc_zlib_start(VncState *vs)
+{
+ buffer_reset(&vs->zlib);
+
+ // make the output buffer be the zlib buffer, so we can compress it later
+ vs->zlib_tmp = vs->output;
+ vs->output = vs->zlib;
+}
+
+static int vnc_zlib_stop(VncState *vs)
+{
+ z_streamp zstream = &vs->zlib_stream;
+ int previous_out;
+
+ // switch back to normal output/zlib buffers
+ vs->zlib = vs->output;
+ vs->output = vs->zlib_tmp;
+
+ // compress the zlib buffer
+
+ // initialize the stream
+ // XXX need one stream per session
+ if (zstream->opaque != vs) {
+ int err;
+
+ VNC_DEBUG("VNC: initializing zlib stream\n");
+ VNC_DEBUG("VNC: opaque = %p | vs = %p\n", zstream->opaque, vs);
+ zstream->zalloc = vnc_zlib_zalloc;
+ zstream->zfree = vnc_zlib_zfree;
+
+ err = deflateInit2(zstream, vs->tight_compression, Z_DEFLATED, MAX_WBITS,
+ MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY);
+
+ if (err != Z_OK) {
+ fprintf(stderr, "VNC: error initializing zlib\n");
+ return -1;
+ }
+
+ vs->zlib_level = vs->tight_compression;
+ zstream->opaque = vs;
+ }
+
+ if (vs->tight_compression != vs->zlib_level) {
+ if (deflateParams(zstream, vs->tight_compression,
+ Z_DEFAULT_STRATEGY) != Z_OK) {
+ return -1;
+ }
+ vs->zlib_level = vs->tight_compression;
+ }
+
+ // reserve memory in output buffer
+ buffer_reserve(&vs->output, vs->zlib.offset + 64);
+
+ // set pointers
+ zstream->next_in = vs->zlib.buffer;
+ zstream->avail_in = vs->zlib.offset;
+ zstream->next_out = vs->output.buffer + vs->output.offset;
+ zstream->avail_out = vs->output.capacity - vs->output.offset;
+ zstream->data_type = Z_BINARY;
+ previous_out = zstream->total_out;
+
+ // start encoding
+ if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
+ fprintf(stderr, "VNC: error during zlib compression\n");
+ return -1;
+ }
+
+ vs->output.offset = vs->output.capacity - zstream->avail_out;
+ return zstream->total_out - previous_out;
+}
+
+int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
+{
+ int old_offset, new_offset, bytes_written;
+
+ vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_ZLIB);
+
+ // remember where we put in the follow-up size
+ old_offset = vs->output.offset;
+ vnc_write_s32(vs, 0);
+
+ // compress the stream
+ vnc_zlib_start(vs);
+ vnc_raw_send_framebuffer_update(vs, x, y, w, h);
+ bytes_written = vnc_zlib_stop(vs);
+
+ if (bytes_written == -1)
+ return 0;
+
+ // hack in the size
+ new_offset = vs->output.offset;
+ vs->output.offset = old_offset;
+ vnc_write_u32(vs, bytes_written);
+ vs->output.offset = new_offset;
+
+ return 1;
+}
+
+void vnc_zlib_clear(VncState *vs)
+{
+ if (vs->zlib_stream.opaque) {
+ deflateEnd(&vs->zlib_stream);
+ }
+ buffer_free(&vs->zlib);
+}
diff --git a/ui/vnc-encoding-hextile.c b/ui/vnc-encoding-hextile.c
deleted file mode 100644
index 728f25e..0000000
--- a/ui/vnc-encoding-hextile.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * QEMU VNC display driver: hextile encoding
- *
- * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
- * Copyright (C) 2006 Fabrice Bellard
- * Copyright (C) 2009 Red Hat, Inc
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "vnc.h"
-
-static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
-{
- ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F);
- ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F);
-}
-
-#define BPP 8
-#include "vnchextile.h"
-#undef BPP
-
-#define BPP 16
-#include "vnchextile.h"
-#undef BPP
-
-#define BPP 32
-#include "vnchextile.h"
-#undef BPP
-
-#define GENERIC
-#define BPP 8
-#include "vnchextile.h"
-#undef BPP
-#undef GENERIC
-
-#define GENERIC
-#define BPP 16
-#include "vnchextile.h"
-#undef BPP
-#undef GENERIC
-
-#define GENERIC
-#define BPP 32
-#include "vnchextile.h"
-#undef BPP
-#undef GENERIC
-
-int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
- int y, int w, int h)
-{
- int i, j;
- int has_fg, has_bg;
- uint8_t *last_fg, *last_bg;
- VncDisplay *vd = vs->vd;
-
- last_fg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
- last_bg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
- has_fg = has_bg = 0;
- for (j = y; j < (y + h); j += 16) {
- for (i = x; i < (x + w); i += 16) {
- vs->send_hextile_tile(vs, i, j,
- MIN(16, x + w - i), MIN(16, y + h - j),
- last_bg, last_fg, &has_bg, &has_fg);
- }
- }
- free(last_fg);
- free(last_bg);
-
- return 1;
-}
-
-void vnc_hextile_set_pixel_conversion(VncState *vs, int generic)
-{
- if (!generic) {
- switch (vs->ds->surface->pf.bits_per_pixel) {
- case 8:
- vs->send_hextile_tile = send_hextile_tile_8;
- break;
- case 16:
- vs->send_hextile_tile = send_hextile_tile_16;
- break;
- case 32:
- vs->send_hextile_tile = send_hextile_tile_32;
- break;
- }
- } else {
- switch (vs->ds->surface->pf.bits_per_pixel) {
- case 8:
- vs->send_hextile_tile = send_hextile_tile_generic_8;
- break;
- case 16:
- vs->send_hextile_tile = send_hextile_tile_generic_16;
- break;
- case 32:
- vs->send_hextile_tile = send_hextile_tile_generic_32;
- break;
- }
- }
-}
diff --git a/ui/vnc-encoding-tight.c b/ui/vnc-encoding-tight.c
deleted file mode 100644
index 51bb707..0000000
--- a/ui/vnc-encoding-tight.c
+++ /dev/null
@@ -1,1522 +0,0 @@
-/*
- * QEMU VNC display driver: tight encoding
- *
- * From libvncserver/libvncserver/tight.c
- * Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved.
- * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
- *
- * Copyright (C) 2010 Corentin Chary <corentin.chary@gmail.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-
-#include "qemu-common.h"
-
-#ifdef CONFIG_VNC_JPEG
-#include <stdio.h>
-#include <jpeglib.h>
-#endif
-#include <stdbool.h>
-
-#include "bswap.h"
-#include "qdict.h"
-#include "qint.h"
-#include "vnc.h"
-#include "vnc-encoding-tight.h"
-
-/* Compression level stuff. The following array contains various
- encoder parameters for each of 10 compression levels (0..9).
- Last three parameters correspond to JPEG quality levels (0..9). */
-
-static const struct {
- int max_rect_size, max_rect_width;
- int mono_min_rect_size, gradient_min_rect_size;
- int idx_zlib_level, mono_zlib_level, raw_zlib_level, gradient_zlib_level;
- int gradient_threshold, gradient_threshold24;
- int idx_max_colors_divisor;
- int jpeg_quality, jpeg_threshold, jpeg_threshold24;
-} tight_conf[] = {
- { 512, 32, 6, 65536, 0, 0, 0, 0, 0, 0, 4, 5, 10000, 23000 },
- { 2048, 128, 6, 65536, 1, 1, 1, 0, 0, 0, 8, 10, 8000, 18000 },
- { 6144, 256, 8, 65536, 3, 3, 2, 0, 0, 0, 24, 15, 6500, 15000 },
- { 10240, 1024, 12, 65536, 5, 5, 3, 0, 0, 0, 32, 25, 5000, 12000 },
- { 16384, 2048, 12, 65536, 6, 6, 4, 0, 0, 0, 32, 37, 4000, 10000 },
- { 32768, 2048, 12, 4096, 7, 7, 5, 4, 150, 380, 32, 50, 3000, 8000 },
- { 65536, 2048, 16, 4096, 7, 7, 6, 4, 170, 420, 48, 60, 2000, 5000 },
- { 65536, 2048, 16, 4096, 8, 8, 7, 5, 180, 450, 64, 70, 1000, 2500 },
- { 65536, 2048, 32, 8192, 9, 9, 8, 6, 190, 475, 64, 75, 500, 1200 },
- { 65536, 2048, 32, 8192, 9, 9, 9, 6, 200, 500, 96, 80, 200, 500 }
-};
-
-/*
- * Code to guess if given rectangle is suitable for smooth image
- * compression (by applying "gradient" filter or JPEG coder).
- */
-
-static uint
-tight_detect_smooth_image24(VncState *vs, int w, int h)
-{
- int off;
- int x, y, d, dx;
- uint c;
- uint stats[256];
- int pixels = 0;
- int pix, left[3];
- uint errors;
- unsigned char *buf = vs->tight.buffer;
-
- /*
- * If client is big-endian, color samples begin from the second
- * byte (offset 1) of a 32-bit pixel value.
- */
- off = !!(vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG);
-
- memset(stats, 0, sizeof (stats));
-
- for (y = 0, x = 0; y < h && x < w;) {
- for (d = 0; d < h - y && d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH;
- d++) {
- for (c = 0; c < 3; c++) {
- left[c] = buf[((y+d)*w+x+d)*4+off+c] & 0xFF;
- }
- for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; dx++) {
- for (c = 0; c < 3; c++) {
- pix = buf[((y+d)*w+x+d+dx)*4+off+c] & 0xFF;
- stats[abs(pix - left[c])]++;
- left[c] = pix;
- }
- pixels++;
- }
- }
- if (w > h) {
- x += h;
- y = 0;
- } else {
- x = 0;
- y += w;
- }
- }
-
- /* 95% smooth or more ... */
- if (stats[0] * 33 / pixels >= 95) {
- return 0;
- }
-
- errors = 0;
- for (c = 1; c < 8; c++) {
- errors += stats[c] * (c * c);
- if (stats[c] == 0 || stats[c] > stats[c-1] * 2) {
- return 0;
- }
- }
- for (; c < 256; c++) {
- errors += stats[c] * (c * c);
- }
- errors /= (pixels * 3 - stats[0]);
-
- return errors;
-}
-
-#define DEFINE_DETECT_FUNCTION(bpp) \
- \
- static uint \
- tight_detect_smooth_image##bpp(VncState *vs, int w, int h) { \
- bool endian; \
- uint##bpp##_t pix; \
- int max[3], shift[3]; \
- int x, y, d, dx; \
- uint c; \
- uint stats[256]; \
- int pixels = 0; \
- int sample, sum, left[3]; \
- uint errors; \
- unsigned char *buf = vs->tight.buffer; \
- \
- endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \
- (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \
- \
- \
- max[0] = vs->clientds.pf.rmax; \
- max[1] = vs->clientds.pf.gmax; \
- max[2] = vs->clientds.pf.bmax; \
- shift[0] = vs->clientds.pf.rshift; \
- shift[1] = vs->clientds.pf.gshift; \
- shift[2] = vs->clientds.pf.bshift; \
- \
- memset(stats, 0, sizeof(stats)); \
- \
- y = 0, x = 0; \
- while (y < h && x < w) { \
- for (d = 0; d < h - y && \
- d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; d++) { \
- pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d]; \
- if (endian) { \
- pix = bswap_##bpp(pix); \
- } \
- for (c = 0; c < 3; c++) { \
- left[c] = (int)(pix >> shift[c] & max[c]); \
- } \
- for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; \
- dx++) { \
- pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d+dx]; \
- if (endian) { \
- pix = bswap_##bpp(pix); \
- } \
- sum = 0; \
- for (c = 0; c < 3; c++) { \
- sample = (int)(pix >> shift[c] & max[c]); \
- sum += abs(sample - left[c]); \
- left[c] = sample; \
- } \
- if (sum > 255) { \
- sum = 255; \
- } \
- stats[sum]++; \
- pixels++; \
- } \
- } \
- if (w > h) { \
- x += h; \
- y = 0; \
- } else { \
- x = 0; \
- y += w; \
- } \
- } \
- \
- if ((stats[0] + stats[1]) * 100 / pixels >= 90) { \
- return 0; \
- } \
- \
- errors = 0; \
- for (c = 1; c < 8; c++) { \
- errors += stats[c] * (c * c); \
- if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { \
- return 0; \
- } \
- } \
- for (; c < 256; c++) { \
- errors += stats[c] * (c * c); \
- } \
- errors /= (pixels - stats[0]); \
- \
- return errors; \
- }
-
-DEFINE_DETECT_FUNCTION(16)
-DEFINE_DETECT_FUNCTION(32)
-
-static int
-tight_detect_smooth_image(VncState *vs, int w, int h)
-{
- uint errors;
- int compression = vs->tight_compression;
- int quality = vs->tight_quality;
-
- if (vs->vd->lossless) {
- return 0;
- }
-
- if (ds_get_bytes_per_pixel(vs->ds) == 1 ||
- vs->clientds.pf.bytes_per_pixel == 1 ||
- w < VNC_TIGHT_DETECT_MIN_WIDTH || h < VNC_TIGHT_DETECT_MIN_HEIGHT) {
- return 0;
- }
-
- if (vs->tight_quality != -1) {
- if (w * h < VNC_TIGHT_JPEG_MIN_RECT_SIZE) {
- return 0;
- }
- } else {
- if (w * h < tight_conf[compression].gradient_min_rect_size) {
- return 0;
- }
- }
-
- if (vs->clientds.pf.bytes_per_pixel == 4) {
- if (vs->tight_pixel24) {
- errors = tight_detect_smooth_image24(vs, w, h);
- if (vs->tight_quality != -1) {
- return (errors < tight_conf[quality].jpeg_threshold24);
- }
- return (errors < tight_conf[compression].gradient_threshold24);
- } else {
- errors = tight_detect_smooth_image32(vs, w, h);
- }
- } else {
- errors = tight_detect_smooth_image16(vs, w, h);
- }
- if (quality != -1) {
- return (errors < tight_conf[quality].jpeg_threshold);
- }
- return (errors < tight_conf[compression].gradient_threshold);
-}
-
-/*
- * Code to determine how many different colors used in rectangle.
- */
-
-static void tight_palette_rgb2buf(uint32_t rgb, int bpp, uint8_t buf[6])
-{
- memset(buf, 0, 6);
-
- if (bpp == 32) {
- buf[0] = ((rgb >> 24) & 0xFF);
- buf[1] = ((rgb >> 16) & 0xFF);
- buf[2] = ((rgb >> 8) & 0xFF);
- buf[3] = ((rgb >> 0) & 0xFF);
- buf[4] = ((buf[0] & 1) == 0) << 3 | ((buf[1] & 1) == 0) << 2;
- buf[4]|= ((buf[2] & 1) == 0) << 1 | ((buf[3] & 1) == 0) << 0;
- buf[0] |= 1;
- buf[1] |= 1;
- buf[2] |= 1;
- buf[3] |= 1;
- }
- if (bpp == 16) {
- buf[0] = ((rgb >> 8) & 0xFF);
- buf[1] = ((rgb >> 0) & 0xFF);
- buf[2] = ((buf[0] & 1) == 0) << 1 | ((buf[1] & 1) == 0) << 0;
- buf[0] |= 1;
- buf[1] |= 1;
- }
-}
-
-static uint32_t tight_palette_buf2rgb(int bpp, const uint8_t *buf)
-{
- uint32_t rgb = 0;
-
- if (bpp == 32) {
- rgb |= ((buf[0] & ~1) | !((buf[4] >> 3) & 1)) << 24;
- rgb |= ((buf[1] & ~1) | !((buf[4] >> 2) & 1)) << 16;
- rgb |= ((buf[2] & ~1) | !((buf[4] >> 1) & 1)) << 8;
- rgb |= ((buf[3] & ~1) | !((buf[4] >> 0) & 1)) << 0;
- }
- if (bpp == 16) {
- rgb |= ((buf[0] & ~1) | !((buf[2] >> 1) & 1)) << 8;
- rgb |= ((buf[1] & ~1) | !((buf[2] >> 0) & 1)) << 0;
- }
- return rgb;
-}
-
-
-static int tight_palette_insert(QDict *palette, uint32_t rgb, int bpp, int max)
-{
- uint8_t key[6];
- int idx = qdict_size(palette);
- bool present;
-
- tight_palette_rgb2buf(rgb, bpp, key);
- present = qdict_haskey(palette, (char *)key);
- if (idx >= max && !present) {
- return 0;
- }
- if (!present) {
- qdict_put(palette, (char *)key, qint_from_int(idx));
- }
- return qdict_size(palette);
-}
-
-#define DEFINE_FILL_PALETTE_FUNCTION(bpp) \
- \
- static int \
- tight_fill_palette##bpp(VncState *vs, int x, int y, \
- int max, size_t count, \
- uint32_t *bg, uint32_t *fg, \
- struct QDict **palette) { \
- uint##bpp##_t *data; \
- uint##bpp##_t c0, c1, ci; \
- int i, n0, n1; \
- \
- data = (uint##bpp##_t *)vs->tight.buffer; \
- \
- c0 = data[0]; \
- i = 1; \
- while (i < count && data[i] == c0) \
- i++; \
- if (i >= count) { \
- *bg = *fg = c0; \
- return 1; \
- } \
- \
- if (max < 2) { \
- return 0; \
- } \
- \
- n0 = i; \
- c1 = data[i]; \
- n1 = 0; \
- for (i++; i < count; i++) { \
- ci = data[i]; \
- if (ci == c0) { \
- n0++; \
- } else if (ci == c1) { \
- n1++; \
- } else \
- break; \
- } \
- if (i >= count) { \
- if (n0 > n1) { \
- *bg = (uint32_t)c0; \
- *fg = (uint32_t)c1; \
- } else { \
- *bg = (uint32_t)c1; \
- *fg = (uint32_t)c0; \
- } \
- return 2; \
- } \
- \
- if (max == 2) { \
- return 0; \
- } \
- \
- *palette = qdict_new(); \
- tight_palette_insert(*palette, c0, bpp, max); \
- tight_palette_insert(*palette, c1, bpp, max); \
- tight_palette_insert(*palette, ci, bpp, max); \
- \
- for (i++; i < count; i++) { \
- if (data[i] == ci) { \
- continue; \
- } else { \
- if (!tight_palette_insert(*palette, (uint32_t)ci, \
- bpp, max)) { \
- return 0; \
- } \
- ci = data[i]; \
- } \
- } \
- \
- return qdict_size(*palette); \
- }
-
-DEFINE_FILL_PALETTE_FUNCTION(8)
-DEFINE_FILL_PALETTE_FUNCTION(16)
-DEFINE_FILL_PALETTE_FUNCTION(32)
-
-static int tight_fill_palette(VncState *vs, int x, int y,
- size_t count, uint32_t *bg, uint32_t *fg,
- struct QDict **palette)
-{
- int max;
-
- max = count / tight_conf[vs->tight_compression].idx_max_colors_divisor;
- if (max < 2 &&
- count >= tight_conf[vs->tight_compression].mono_min_rect_size) {
- max = 2;
- }
- if (max >= 256) {
- max = 256;
- }
-
- switch(vs->clientds.pf.bytes_per_pixel) {
- case 4:
- return tight_fill_palette32(vs, x, y, max, count, bg, fg, palette);
- case 2:
- return tight_fill_palette16(vs, x, y, max, count, bg, fg, palette);
- default:
- max = 2;
- return tight_fill_palette8(vs, x, y, max, count, bg, fg, palette);
- }
- return 0;
-}
-
-/* Callback to dump a palette with qdict_iter
-static void print_palette(const char *key, QObject *obj, void *opaque)
-{
- uint8_t idx = qint_get_int(qobject_to_qint(obj));
- uint32_t rgb = tight_palette_buf2rgb(32, (uint8_t *)key);
-
- fprintf(stderr, "%.2x ", (unsigned char)*key);
- while (*key++)
- fprintf(stderr, "%.2x ", (unsigned char)*key);
-
- fprintf(stderr, ": idx: %x rgb: %x\n", idx, rgb);
-}
-*/
-
-/*
- * Converting truecolor samples into palette indices.
- */
-#define DEFINE_IDX_ENCODE_FUNCTION(bpp) \
- \
- static void \
- tight_encode_indexed_rect##bpp(uint8_t *buf, int count, \
- struct QDict *palette) { \
- uint##bpp##_t *src; \
- uint##bpp##_t rgb; \
- uint8_t key[6]; \
- int i = 0, rep = 0; \
- uint8_t idx; \
- \
- src = (uint##bpp##_t *) buf; \
- \
- for (i = 0; i < count; i++) { \
- rgb = *src++; \
- rep = 0; \
- while (i < count && *src == rgb) { \
- rep++, src++, i++; \
- } \
- tight_palette_rgb2buf(rgb, bpp, key); \
- if (!qdict_haskey(palette, (char *)key)) { \
- /* \
- * Should never happen, but don't break everything \
- * if it does, use the first color instead \
- */ \
- idx = 0; \
- } else { \
- idx = qdict_get_int(palette, (char *)key); \
- } \
- while (rep >= 0) { \
- *buf++ = idx; \
- rep--; \
- } \
- } \
- }
-
-DEFINE_IDX_ENCODE_FUNCTION(16)
-DEFINE_IDX_ENCODE_FUNCTION(32)
-
-#define DEFINE_MONO_ENCODE_FUNCTION(bpp) \
- \
- static void \
- tight_encode_mono_rect##bpp(uint8_t *buf, int w, int h, \
- uint##bpp##_t bg, uint##bpp##_t fg) { \
- uint##bpp##_t *ptr; \
- unsigned int value, mask; \
- int aligned_width; \
- int x, y, bg_bits; \
- \
- ptr = (uint##bpp##_t *) buf; \
- aligned_width = w - w % 8; \
- \
- for (y = 0; y < h; y++) { \
- for (x = 0; x < aligned_width; x += 8) { \
- for (bg_bits = 0; bg_bits < 8; bg_bits++) { \
- if (*ptr++ != bg) { \
- break; \
- } \
- } \
- if (bg_bits == 8) { \
- *buf++ = 0; \
- continue; \
- } \
- mask = 0x80 >> bg_bits; \
- value = mask; \
- for (bg_bits++; bg_bits < 8; bg_bits++) { \
- mask >>= 1; \
- if (*ptr++ != bg) { \
- value |= mask; \
- } \
- } \
- *buf++ = (uint8_t)value; \
- } \
- \
- mask = 0x80; \
- value = 0; \
- if (x >= w) { \
- continue; \
- } \
- \
- for (; x < w; x++) { \
- if (*ptr++ != bg) { \
- value |= mask; \
- } \
- mask >>= 1; \
- } \
- *buf++ = (uint8_t)value; \
- } \
- }
-
-DEFINE_MONO_ENCODE_FUNCTION(8)
-DEFINE_MONO_ENCODE_FUNCTION(16)
-DEFINE_MONO_ENCODE_FUNCTION(32)
-
-/*
- * ``Gradient'' filter for 24-bit color samples.
- * Should be called only when redMax, greenMax and blueMax are 255.
- * Color components assumed to be byte-aligned.
- */
-
-static void
-tight_filter_gradient24(VncState *vs, uint8_t *buf, int w, int h)
-{
- uint32_t *buf32;
- uint32_t pix32;
- int shift[3];
- int *prev;
- int here[3], upper[3], left[3], upperleft[3];
- int prediction;
- int x, y, c;
-
- buf32 = (uint32_t *)buf;
- memset(vs->tight_gradient.buffer, 0, w * 3 * sizeof(int));
-
- if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
- (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
- shift[0] = vs->clientds.pf.rshift;
- shift[1] = vs->clientds.pf.gshift;
- shift[2] = vs->clientds.pf.bshift;
- } else {
- shift[0] = 24 - vs->clientds.pf.rshift;
- shift[1] = 24 - vs->clientds.pf.gshift;
- shift[2] = 24 - vs->clientds.pf.bshift;
- }
-
- for (y = 0; y < h; y++) {
- for (c = 0; c < 3; c++) {
- upper[c] = 0;
- here[c] = 0;
- }
- prev = (int *)vs->tight_gradient.buffer;
- for (x = 0; x < w; x++) {
- pix32 = *buf32++;
- for (c = 0; c < 3; c++) {
- upperleft[c] = upper[c];
- left[c] = here[c];
- upper[c] = *prev;
- here[c] = (int)(pix32 >> shift[c] & 0xFF);
- *prev++ = here[c];
-
- prediction = left[c] + upper[c] - upperleft[c];
- if (prediction < 0) {
- prediction = 0;
- } else if (prediction > 0xFF) {
- prediction = 0xFF;
- }
- *buf++ = (char)(here[c] - prediction);
- }
- }
- }
-}
-
-
-/*
- * ``Gradient'' filter for other color depths.
- */
-
-#define DEFINE_GRADIENT_FILTER_FUNCTION(bpp) \
- \
- static void \
- tight_filter_gradient##bpp(VncState *vs, uint##bpp##_t *buf, \
- int w, int h) { \
- uint##bpp##_t pix, diff; \
- bool endian; \
- int *prev; \
- int max[3], shift[3]; \
- int here[3], upper[3], left[3], upperleft[3]; \
- int prediction; \
- int x, y, c; \
- \
- memset (vs->tight_gradient.buffer, 0, w * 3 * sizeof(int)); \
- \
- endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \
- (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \
- \
- max[0] = vs->clientds.pf.rmax; \
- max[1] = vs->clientds.pf.gmax; \
- max[2] = vs->clientds.pf.bmax; \
- shift[0] = vs->clientds.pf.rshift; \
- shift[1] = vs->clientds.pf.gshift; \
- shift[2] = vs->clientds.pf.bshift; \
- \
- for (y = 0; y < h; y++) { \
- for (c = 0; c < 3; c++) { \
- upper[c] = 0; \
- here[c] = 0; \
- } \
- prev = (int *)vs->tight_gradient.buffer; \
- for (x = 0; x < w; x++) { \
- pix = *buf; \
- if (endian) { \
- pix = bswap_##bpp(pix); \
- } \
- diff = 0; \
- for (c = 0; c < 3; c++) { \
- upperleft[c] = upper[c]; \
- left[c] = here[c]; \
- upper[c] = *prev; \
- here[c] = (int)(pix >> shift[c] & max[c]); \
- *prev++ = here[c]; \
- \
- prediction = left[c] + upper[c] - upperleft[c]; \
- if (prediction < 0) { \
- prediction = 0; \
- } else if (prediction > max[c]) { \
- prediction = max[c]; \
- } \
- diff |= ((here[c] - prediction) & max[c]) \
- << shift[c]; \
- } \
- if (endian) { \
- diff = bswap_##bpp(diff); \
- } \
- *buf++ = diff; \
- } \
- } \
- }
-
-DEFINE_GRADIENT_FILTER_FUNCTION(16)
-DEFINE_GRADIENT_FILTER_FUNCTION(32)
-
-/*
- * Check if a rectangle is all of the same color. If needSameColor is
- * set to non-zero, then also check that its color equals to the
- * *colorPtr value. The result is 1 if the test is successfull, and in
- * that case new color will be stored in *colorPtr.
- */
-
-#define DEFINE_CHECK_SOLID_FUNCTION(bpp) \
- \
- static bool \
- check_solid_tile##bpp(VncState *vs, int x, int y, int w, int h, \
- uint32_t* color, bool samecolor) \
- { \
- VncDisplay *vd = vs->vd; \
- uint##bpp##_t *fbptr; \
- uint##bpp##_t c; \
- int dx, dy; \
- \
- fbptr = (uint##bpp##_t *) \
- (vd->server->data + y * ds_get_linesize(vs->ds) + \
- x * ds_get_bytes_per_pixel(vs->ds)); \
- \
- c = *fbptr; \
- if (samecolor && (uint32_t)c != *color) { \
- return false; \
- } \
- \
- for (dy = 0; dy < h; dy++) { \
- for (dx = 0; dx < w; dx++) { \
- if (c != fbptr[dx]) { \
- return false; \
- } \
- } \
- fbptr = (uint##bpp##_t *) \
- ((uint8_t *)fbptr + ds_get_linesize(vs->ds)); \
- } \
- \
- *color = (uint32_t)c; \
- return true; \
- }
-
-DEFINE_CHECK_SOLID_FUNCTION(32)
-DEFINE_CHECK_SOLID_FUNCTION(16)
-DEFINE_CHECK_SOLID_FUNCTION(8)
-
-static bool check_solid_tile(VncState *vs, int x, int y, int w, int h,
- uint32_t* color, bool samecolor)
-{
- VncDisplay *vd = vs->vd;
-
- switch(vd->server->pf.bytes_per_pixel) {
- case 4:
- return check_solid_tile32(vs, x, y, w, h, color, samecolor);
- case 2:
- return check_solid_tile16(vs, x, y, w, h, color, samecolor);
- default:
- return check_solid_tile8(vs, x, y, w, h, color, samecolor);
- }
-}
-
-static void find_best_solid_area(VncState *vs, int x, int y, int w, int h,
- uint32_t color, int *w_ptr, int *h_ptr)
-{
- int dx, dy, dw, dh;
- int w_prev;
- int w_best = 0, h_best = 0;
-
- w_prev = w;
-
- for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
-
- dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, y + h - dy);
- dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, w_prev);
-
- if (!check_solid_tile(vs, x, dy, dw, dh, &color, true)) {
- break;
- }
-
- for (dx = x + dw; dx < x + w_prev;) {
- dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, x + w_prev - dx);
-
- if (!check_solid_tile(vs, dx, dy, dw, dh, &color, true)) {
- break;
- }
- dx += dw;
- }
-
- w_prev = dx - x;
- if (w_prev * (dy + dh - y) > w_best * h_best) {
- w_best = w_prev;
- h_best = dy + dh - y;
- }
- }
-
- *w_ptr = w_best;
- *h_ptr = h_best;
-}
-
-static void extend_solid_area(VncState *vs, int x, int y, int w, int h,
- uint32_t color, int *x_ptr, int *y_ptr,
- int *w_ptr, int *h_ptr)
-{
- int cx, cy;
-
- /* Try to extend the area upwards. */
- for ( cy = *y_ptr - 1;
- cy >= y && check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
- cy-- );
- *h_ptr += *y_ptr - (cy + 1);
- *y_ptr = cy + 1;
-
- /* ... downwards. */
- for ( cy = *y_ptr + *h_ptr;
- cy < y + h &&
- check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
- cy++ );
- *h_ptr += cy - (*y_ptr + *h_ptr);
-
- /* ... to the left. */
- for ( cx = *x_ptr - 1;
- cx >= x && check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
- cx-- );
- *w_ptr += *x_ptr - (cx + 1);
- *x_ptr = cx + 1;
-
- /* ... to the right. */
- for ( cx = *x_ptr + *w_ptr;
- cx < x + w &&
- check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
- cx++ );
- *w_ptr += cx - (*x_ptr + *w_ptr);
-}
-
-static int tight_init_stream(VncState *vs, int stream_id,
- int level, int strategy)
-{
- z_streamp zstream = &vs->tight_stream[stream_id];
-
- if (zstream->opaque == NULL) {
- int err;
-
- VNC_DEBUG("VNC: TIGHT: initializing zlib stream %d\n", stream_id);
- VNC_DEBUG("VNC: TIGHT: opaque = %p | vs = %p\n", zstream->opaque, vs);
- zstream->zalloc = vnc_zlib_zalloc;
- zstream->zfree = vnc_zlib_zfree;
-
- err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS,
- MAX_MEM_LEVEL, strategy);
-
- if (err != Z_OK) {
- fprintf(stderr, "VNC: error initializing zlib\n");
- return -1;
- }
-
- vs->tight_levels[stream_id] = level;
- zstream->opaque = vs;
- }
-
- if (vs->tight_levels[stream_id] != level) {
- if (deflateParams(zstream, level, strategy) != Z_OK) {
- return -1;
- }
- vs->tight_levels[stream_id] = level;
- }
- return 0;
-}
-
-static void tight_send_compact_size(VncState *vs, size_t len)
-{
- int lpc = 0;
- int bytes = 0;
- char buf[3] = {0, 0, 0};
-
- buf[bytes++] = len & 0x7F;
- if (len > 0x7F) {
- buf[bytes-1] |= 0x80;
- buf[bytes++] = (len >> 7) & 0x7F;
- if (len > 0x3FFF) {
- buf[bytes-1] |= 0x80;
- buf[bytes++] = (len >> 14) & 0xFF;
- }
- }
- for (lpc = 0; lpc < bytes; lpc++) {
- vnc_write_u8(vs, buf[lpc]);
- }
-}
-
-static int tight_compress_data(VncState *vs, int stream_id, size_t bytes,
- int level, int strategy)
-{
- z_streamp zstream = &vs->tight_stream[stream_id];
- int previous_out;
-
- if (bytes < VNC_TIGHT_MIN_TO_COMPRESS) {
- vnc_write(vs, vs->tight.buffer, vs->tight.offset);
- return bytes;
- }
-
- if (tight_init_stream(vs, stream_id, level, strategy)) {
- return -1;
- }
-
- /* reserve memory in output buffer */
- buffer_reserve(&vs->tight_zlib, bytes + 64);
-
- /* set pointers */
- zstream->next_in = vs->tight.buffer;
- zstream->avail_in = vs->tight.offset;
- zstream->next_out = vs->tight_zlib.buffer + vs->tight_zlib.offset;
- zstream->avail_out = vs->tight_zlib.capacity - vs->tight_zlib.offset;
- zstream->data_type = Z_BINARY;
- previous_out = zstream->total_out;
-
- /* start encoding */
- if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
- fprintf(stderr, "VNC: error during tight compression\n");
- return -1;
- }
-
- vs->tight_zlib.offset = vs->tight_zlib.capacity - zstream->avail_out;
- bytes = zstream->total_out - previous_out;
-
- tight_send_compact_size(vs, bytes);
- vnc_write(vs, vs->tight_zlib.buffer, bytes);
-
- buffer_reset(&vs->tight_zlib);
-
- return bytes;
-}
-
-/*
- * Subencoding implementations.
- */
-static void tight_pack24(VncState *vs, uint8_t *buf, size_t count, size_t *ret)
-{
- uint32_t *buf32;
- uint32_t pix;
- int rshift, gshift, bshift;
-
- buf32 = (uint32_t *)buf;
-
- if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
- (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
- rshift = vs->clientds.pf.rshift;
- gshift = vs->clientds.pf.gshift;
- bshift = vs->clientds.pf.bshift;
- } else {
- rshift = 24 - vs->clientds.pf.rshift;
- gshift = 24 - vs->clientds.pf.gshift;
- bshift = 24 - vs->clientds.pf.bshift;
- }
-
- if (ret) {
- *ret = count * 3;
- }
-
- while (count--) {
- pix = *buf32++;
- *buf++ = (char)(pix >> rshift);
- *buf++ = (char)(pix >> gshift);
- *buf++ = (char)(pix >> bshift);
- }
-}
-
-static int send_full_color_rect(VncState *vs, int w, int h)
-{
- int stream = 0;
- size_t bytes;
-
- vnc_write_u8(vs, stream << 4); /* no flushing, no filter */
-
- if (vs->tight_pixel24) {
- tight_pack24(vs, vs->tight.buffer, w * h, &vs->tight.offset);
- bytes = 3;
- } else {
- bytes = vs->clientds.pf.bytes_per_pixel;
- }
-
- bytes = tight_compress_data(vs, stream, w * h * bytes,
- tight_conf[vs->tight_compression].raw_zlib_level,
- Z_DEFAULT_STRATEGY);
-
- return (bytes >= 0);
-}
-
-static int send_solid_rect(VncState *vs)
-{
- size_t bytes;
-
- vnc_write_u8(vs, VNC_TIGHT_FILL << 4); /* no flushing, no filter */
-
- if (vs->tight_pixel24) {
- tight_pack24(vs, vs->tight.buffer, 1, &vs->tight.offset);
- bytes = 3;
- } else {
- bytes = vs->clientds.pf.bytes_per_pixel;
- }
-
- vnc_write(vs, vs->tight.buffer, bytes);
- return 1;
-}
-
-static int send_mono_rect(VncState *vs, int w, int h, uint32_t bg, uint32_t fg)
-{
- size_t bytes;
- int stream = 1;
- int level = tight_conf[vs->tight_compression].mono_zlib_level;
-
- bytes = ((w + 7) / 8) * h;
-
- vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
- vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
- vnc_write_u8(vs, 1);
-
- switch(vs->clientds.pf.bytes_per_pixel) {
- case 4:
- {
- uint32_t buf[2] = {bg, fg};
- size_t ret = sizeof (buf);
-
- if (vs->tight_pixel24) {
- tight_pack24(vs, (unsigned char*)buf, 2, &ret);
- }
- vnc_write(vs, buf, ret);
-
- tight_encode_mono_rect32(vs->tight.buffer, w, h, bg, fg);
- break;
- }
- case 2:
- vnc_write(vs, &bg, 2);
- vnc_write(vs, &fg, 2);
- tight_encode_mono_rect16(vs->tight.buffer, w, h, bg, fg);
- break;
- default:
- vnc_write_u8(vs, bg);
- vnc_write_u8(vs, fg);
- tight_encode_mono_rect8(vs->tight.buffer, w, h, bg, fg);
- break;
- }
- vs->tight.offset = bytes;
-
- bytes = tight_compress_data(vs, stream, bytes, level, Z_DEFAULT_STRATEGY);
- return (bytes >= 0);
-}
-
-struct palette_cb_priv {
- VncState *vs;
- uint8_t *header;
-};
-
-static void write_palette(const char *key, QObject *obj, void *opaque)
-{
- struct palette_cb_priv *priv = opaque;
- VncState *vs = priv->vs;
- uint32_t bytes = vs->clientds.pf.bytes_per_pixel;
- uint8_t idx = qint_get_int(qobject_to_qint(obj));
-
- if (bytes == 4) {
- uint32_t color = tight_palette_buf2rgb(32, (uint8_t *)key);
-
- ((uint32_t*)priv->header)[idx] = color;
- } else {
- uint16_t color = tight_palette_buf2rgb(16, (uint8_t *)key);
-
- ((uint16_t*)priv->header)[idx] = color;
- }
-}
-
-static bool send_gradient_rect(VncState *vs, int w, int h)
-{
- int stream = 3;
- int level = tight_conf[vs->tight_compression].gradient_zlib_level;
- size_t bytes;
-
- if (vs->clientds.pf.bytes_per_pixel == 1)
- return send_full_color_rect(vs, w, h);
-
- vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
- vnc_write_u8(vs, VNC_TIGHT_FILTER_GRADIENT);
-
- buffer_reserve(&vs->tight_gradient, w * 3 * sizeof (int));
-
- if (vs->tight_pixel24) {
- tight_filter_gradient24(vs, vs->tight.buffer, w, h);
- bytes = 3;
- } else if (vs->clientds.pf.bytes_per_pixel == 4) {
- tight_filter_gradient32(vs, (uint32_t *)vs->tight.buffer, w, h);
- bytes = 4;
- } else {
- tight_filter_gradient16(vs, (uint16_t *)vs->tight.buffer, w, h);
- bytes = 2;
- }
-
- buffer_reset(&vs->tight_gradient);
-
- bytes = w * h * bytes;
- vs->tight.offset = bytes;
-
- bytes = tight_compress_data(vs, stream, bytes,
- level, Z_FILTERED);
- return (bytes >= 0);
-}
-
-static int send_palette_rect(VncState *vs, int w, int h, struct QDict *palette)
-{
- int stream = 2;
- int level = tight_conf[vs->tight_compression].idx_zlib_level;
- int colors;
- size_t bytes;
-
- colors = qdict_size(palette);
-
- vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
- vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
- vnc_write_u8(vs, colors - 1);
-
- switch(vs->clientds.pf.bytes_per_pixel) {
- case 4:
- {
- size_t old_offset, offset;
- uint32_t header[qdict_size(palette)];
- struct palette_cb_priv priv = { vs, (uint8_t *)header };
-
- old_offset = vs->output.offset;
- qdict_iter(palette, write_palette, &priv);
- vnc_write(vs, header, sizeof(header));
-
- if (vs->tight_pixel24) {
- tight_pack24(vs, vs->output.buffer + old_offset, colors, &offset);
- vs->output.offset = old_offset + offset;
- }
-
- tight_encode_indexed_rect32(vs->tight.buffer, w * h, palette);
- break;
- }
- case 2:
- {
- uint16_t header[qdict_size(palette)];
- struct palette_cb_priv priv = { vs, (uint8_t *)header };
-
- qdict_iter(palette, write_palette, &priv);
- vnc_write(vs, header, sizeof(header));
- tight_encode_indexed_rect16(vs->tight.buffer, w * h, palette);
- break;
- }
- default:
- return -1; /* No palette for 8bits colors */
- break;
- }
- bytes = w * h;
- vs->tight.offset = bytes;
-
- bytes = tight_compress_data(vs, stream, bytes,
- level, Z_DEFAULT_STRATEGY);
- return (bytes >= 0);
-}
-
-/*
- * JPEG compression stuff.
- */
-#ifdef CONFIG_VNC_JPEG
-static void jpeg_prepare_row24(VncState *vs, uint8_t *dst, int x, int y,
- int count)
-{
- VncDisplay *vd = vs->vd;
- uint32_t *fbptr;
- uint32_t pix;
-
- fbptr = (uint32_t *)(vd->server->data + y * ds_get_linesize(vs->ds) +
- x * ds_get_bytes_per_pixel(vs->ds));
-
- while (count--) {
- pix = *fbptr++;
- *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.rshift);
- *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.gshift);
- *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.bshift);
- }
-}
-
-#define DEFINE_JPEG_GET_ROW_FUNCTION(bpp) \
- \
- static void \
- jpeg_prepare_row##bpp(VncState *vs, uint8_t *dst, \
- int x, int y, int count) \
- { \
- VncDisplay *vd = vs->vd; \
- uint##bpp##_t *fbptr; \
- uint##bpp##_t pix; \
- int r, g, b; \
- \
- fbptr = (uint##bpp##_t *) \
- (vd->server->data + y * ds_get_linesize(vs->ds) + \
- x * ds_get_bytes_per_pixel(vs->ds)); \
- \
- while (count--) { \
- pix = *fbptr++; \
- \
- r = (int)((pix >> vs->ds->surface->pf.rshift) \
- & vs->ds->surface->pf.rmax); \
- g = (int)((pix >> vs->ds->surface->pf.gshift) \
- & vs->ds->surface->pf.gmax); \
- b = (int)((pix >> vs->ds->surface->pf.bshift) \
- & vs->ds->surface->pf.bmax); \
- \
- *dst++ = (uint8_t)((r * 255 + vs->ds->surface->pf.rmax / 2) \
- / vs->ds->surface->pf.rmax); \
- *dst++ = (uint8_t)((g * 255 + vs->ds->surface->pf.gmax / 2) \
- / vs->ds->surface->pf.gmax); \
- *dst++ = (uint8_t)((b * 255 + vs->ds->surface->pf.bmax / 2) \
- / vs->ds->surface->pf.bmax); \
- } \
- }
-
-DEFINE_JPEG_GET_ROW_FUNCTION(16)
-DEFINE_JPEG_GET_ROW_FUNCTION(32)
-
-static void jpeg_prepare_row(VncState *vs, uint8_t *dst, int x, int y,
- int count)
-{
- if (vs->tight_pixel24)
- jpeg_prepare_row24(vs, dst, x, y, count);
- else if (ds_get_bytes_per_pixel(vs->ds) == 4)
- jpeg_prepare_row32(vs, dst, x, y, count);
- else
- jpeg_prepare_row16(vs, dst, x, y, count);
-}
-
-/*
- * Destination manager implementation for JPEG library.
- */
-
-/* This is called once per encoding */
-static void jpeg_init_destination(j_compress_ptr cinfo)
-{
- VncState *vs = cinfo->client_data;
- Buffer *buffer = &vs->tight_jpeg;
-
- cinfo->dest->next_output_byte = (JOCTET *)buffer->buffer + buffer->offset;
- cinfo->dest->free_in_buffer = (size_t)(buffer->capacity - buffer->offset);
-}
-
-/* This is called when we ran out of buffer (shouldn't happen!) */
-static boolean jpeg_empty_output_buffer(j_compress_ptr cinfo)
-{
- VncState *vs = cinfo->client_data;
- Buffer *buffer = &vs->tight_jpeg;
-
- buffer->offset = buffer->capacity;
- buffer_reserve(buffer, 2048);
- jpeg_init_destination(cinfo);
- return TRUE;
-}
-
-/* This is called when we are done processing data */
-static void jpeg_term_destination(j_compress_ptr cinfo)
-{
- VncState *vs = cinfo->client_data;
- Buffer *buffer = &vs->tight_jpeg;
-
- buffer->offset = buffer->capacity - cinfo->dest->free_in_buffer;
-}
-
-static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality)
-{
- struct jpeg_compress_struct cinfo;
- struct jpeg_error_mgr jerr;
- struct jpeg_destination_mgr manager;
- JSAMPROW row[1];
- uint8_t *buf;
- int dy;
-
- if (ds_get_bytes_per_pixel(vs->ds) == 1)
- return send_full_color_rect(vs, w, h);
-
- buf = qemu_malloc(w * 3);
- row[0] = buf;
- buffer_reserve(&vs->tight_jpeg, 2048);
-
- cinfo.err = jpeg_std_error(&jerr);
- jpeg_create_compress(&cinfo);
-
- cinfo.client_data = vs;
- cinfo.image_width = w;
- cinfo.image_height = h;
- cinfo.input_components = 3;
- cinfo.in_color_space = JCS_RGB;
-
- jpeg_set_defaults(&cinfo);
- jpeg_set_quality(&cinfo, quality, true);
-
- manager.init_destination = jpeg_init_destination;
- manager.empty_output_buffer = jpeg_empty_output_buffer;
- manager.term_destination = jpeg_term_destination;
- cinfo.dest = &manager;
-
- jpeg_start_compress(&cinfo, true);
-
- for (dy = 0; dy < h; dy++) {
- jpeg_prepare_row(vs, buf, x, y + dy, w);
- jpeg_write_scanlines(&cinfo, row, 1);
- }
-
- jpeg_finish_compress(&cinfo);
- jpeg_destroy_compress(&cinfo);
-
- vnc_write_u8(vs, VNC_TIGHT_JPEG << 4);
-
- tight_send_compact_size(vs, vs->tight_jpeg.offset);
- vnc_write(vs, vs->tight_jpeg.buffer, vs->tight_jpeg.offset);
- buffer_reset(&vs->tight_jpeg);
-
- return 1;
-}
-#endif /* CONFIG_VNC_JPEG */
-
-static void vnc_tight_start(VncState *vs)
-{
- buffer_reset(&vs->tight);
-
- // make the output buffer be the zlib buffer, so we can compress it later
- vs->tight_tmp = vs->output;
- vs->output = vs->tight;
-}
-
-static void vnc_tight_stop(VncState *vs)
-{
- // switch back to normal output/zlib buffers
- vs->tight = vs->output;
- vs->output = vs->tight_tmp;
-}
-
-static int send_sub_rect(VncState *vs, int x, int y, int w, int h)
-{
- struct QDict *palette = NULL;
- uint32_t bg = 0, fg = 0;
- int colors;
- int ret = 0;
-
- vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_TIGHT);
-
- vnc_tight_start(vs);
- vnc_raw_send_framebuffer_update(vs, x, y, w, h);
- vnc_tight_stop(vs);
-
- colors = tight_fill_palette(vs, x, y, w * h, &fg, &bg, &palette);
-
- if (colors == 0) {
- if (tight_detect_smooth_image(vs, w, h)) {
- if (vs->tight_quality == -1) {
- ret = send_gradient_rect(vs, w, h);
- } else {
-#ifdef CONFIG_VNC_JPEG
- int quality = tight_conf[vs->tight_quality].jpeg_quality;
-
- ret = send_jpeg_rect(vs, x, y, w, h, quality);
-#else
- ret = send_full_color_rect(vs, w, h);
-#endif
- }
- } else {
- ret = send_full_color_rect(vs, w, h);
- }
- } else if (colors == 1) {
- ret = send_solid_rect(vs);
- } else if (colors == 2) {
- ret = send_mono_rect(vs, w, h, bg, fg);
- } else if (colors <= 256) {
-#ifdef CONFIG_VNC_JPEG
- if (colors > 96 && vs->tight_quality != -1 && vs->tight_quality <= 3 &&
- tight_detect_smooth_image(vs, w, h)) {
- int quality = tight_conf[vs->tight_quality].jpeg_quality;
-
- ret = send_jpeg_rect(vs, x, y, w, h, quality);
- } else {
- ret = send_palette_rect(vs, w, h, palette);
- }
-#else
- ret = send_palette_rect(vs, w, h, palette);
-#endif
- }
- QDECREF(palette);
- return ret;
-}
-
-static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h)
-{
- vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_TIGHT);
-
- vnc_tight_start(vs);
- vnc_raw_send_framebuffer_update(vs, x, y, w, h);
- vnc_tight_stop(vs);
-
- return send_solid_rect(vs);
-}
-
-static int send_rect_simple(VncState *vs, int x, int y, int w, int h)
-{
- int max_size, max_width;
- int max_sub_width, max_sub_height;
- int dx, dy;
- int rw, rh;
- int n = 0;
-
- max_size = tight_conf[vs->tight_compression].max_rect_size;
- max_width = tight_conf[vs->tight_compression].max_rect_width;
-
- if (w > max_width || w * h > max_size) {
- max_sub_width = (w > max_width) ? max_width : w;
- max_sub_height = max_size / max_sub_width;
-
- for (dy = 0; dy < h; dy += max_sub_height) {
- for (dx = 0; dx < w; dx += max_width) {
- rw = MIN(max_sub_width, w - dx);
- rh = MIN(max_sub_height, h - dy);
- n += send_sub_rect(vs, x+dx, y+dy, rw, rh);
- }
- }
- } else {
- n += send_sub_rect(vs, x, y, w, h);
- }
-
- return n;
-}
-
-static int find_large_solid_color_rect(VncState *vs, int x, int y,
- int w, int h, int max_rows)
-{
- int dx, dy, dw, dh;
- int n = 0;
-
- /* Try to find large solid-color areas and send them separately. */
-
- for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
-
- /* If a rectangle becomes too large, send its upper part now. */
-
- if (dy - y >= max_rows) {
- n += send_rect_simple(vs, x, y, w, max_rows);
- y += max_rows;
- h -= max_rows;
- }
-
- dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (y + h - dy));
-
- for (dx = x; dx < x + w; dx += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
- uint32_t color_value;
- int x_best, y_best, w_best, h_best;
-
- dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (x + w - dx));
-
- if (!check_solid_tile(vs, dx, dy, dw, dh, &color_value, false)) {
- continue ;
- }
-
- /* Get dimensions of solid-color area. */
-
- find_best_solid_area(vs, dx, dy, w - (dx - x), h - (dy - y),
- color_value, &w_best, &h_best);
-
- /* Make sure a solid rectangle is large enough
- (or the whole rectangle is of the same color). */
-
- if (w_best * h_best != w * h &&
- w_best * h_best < VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE) {
- continue;
- }
-
- /* Try to extend solid rectangle to maximum size. */
-
- x_best = dx; y_best = dy;
- extend_solid_area(vs, x, y, w, h, color_value,
- &x_best, &y_best, &w_best, &h_best);
-
- /* Send rectangles at top and left to solid-color area. */
-
- if (y_best != y) {
- n += send_rect_simple(vs, x, y, w, y_best-y);
- }
- if (x_best != x) {
- n += vnc_tight_send_framebuffer_update(vs, x, y_best,
- x_best-x, h_best);
- }
-
- /* Send solid-color rectangle. */
- n += send_sub_rect_solid(vs, x_best, y_best, w_best, h_best);
-
- /* Send remaining rectangles (at right and bottom). */
-
- if (x_best + w_best != x + w) {
- n += vnc_tight_send_framebuffer_update(vs, x_best+w_best,
- y_best,
- w-(x_best-x)-w_best,
- h_best);
- }
- if (y_best + h_best != y + h) {
- n += vnc_tight_send_framebuffer_update(vs, x, y_best+h_best,
- w, h-(y_best-y)-h_best);
- }
-
- /* Return after all recursive calls are done. */
- return n;
- }
- }
- return n + send_rect_simple(vs, x, y, w, h);
-}
-
-int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y,
- int w, int h)
-{
- int max_rows;
-
- if (vs->clientds.pf.bytes_per_pixel == 4 && vs->clientds.pf.rmax == 0xFF &&
- vs->clientds.pf.bmax == 0xFF && vs->clientds.pf.gmax == 0xFF) {
- vs->tight_pixel24 = true;
- } else {
- vs->tight_pixel24 = false;
- }
-
- if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE)
- return send_rect_simple(vs, x, y, w, h);
-
- /* Calculate maximum number of rows in one non-solid rectangle. */
-
- max_rows = tight_conf[vs->tight_compression].max_rect_size;
- max_rows /= MIN(tight_conf[vs->tight_compression].max_rect_width, w);
-
- return find_large_solid_color_rect(vs, x, y, w, h, max_rows);
-}
-
-void vnc_tight_clear(VncState *vs)
-{
- int i;
- for (i=0; i<ARRAY_SIZE(vs->tight_stream); i++) {
- if (vs->tight_stream[i].opaque) {
- deflateEnd(&vs->tight_stream[i]);
- }
- }
-
- buffer_free(&vs->tight);
- buffer_free(&vs->tight_zlib);
- buffer_free(&vs->tight_gradient);
-#ifdef CONFIG_VNC_JPEG
- buffer_free(&vs->tight_jpeg);
-#endif
-}
diff --git a/ui/vnc-encoding-tight.h b/ui/vnc-encoding-tight.h
deleted file mode 100644
index 9b0910c..0000000
--- a/ui/vnc-encoding-tight.h
+++ /dev/null
@@ -1,181 +0,0 @@
-/*
- * QEMU VNC display driver: tight encoding
- *
- * From libvncserver/rfb/rfbproto.h
- * Copyright (C) 2005 Rohit Kumar, Johannes E. Schindelin
- * Copyright (C) 2000-2002 Constantin Kaplinsky. All Rights Reserved.
- * Copyright (C) 2000 Tridia Corporation. All Rights Reserved.
- * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
- *
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#ifndef VNC_ENCODING_TIGHT_H
-#define VNC_ENCODING_TIGHT_H
-
-/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- * Tight Encoding.
- *
- *-- The first byte of each Tight-encoded rectangle is a "compression control
- * byte". Its format is as follows (bit 0 is the least significant one):
- *
- * bit 0: if 1, then compression stream 0 should be reset;
- * bit 1: if 1, then compression stream 1 should be reset;
- * bit 2: if 1, then compression stream 2 should be reset;
- * bit 3: if 1, then compression stream 3 should be reset;
- * bits 7-4: if 1000 (0x08), then the compression type is "fill",
- * if 1001 (0x09), then the compression type is "jpeg",
- * if 0xxx, then the compression type is "basic",
- * values greater than 1001 are not valid.
- *
- * If the compression type is "basic", then bits 6..4 of the
- * compression control byte (those xxx in 0xxx) specify the following:
- *
- * bits 5-4: decimal representation is the index of a particular zlib
- * stream which should be used for decompressing the data;
- * bit 6: if 1, then a "filter id" byte is following this byte.
- *
- *-- The data that follows after the compression control byte described
- * above depends on the compression type ("fill", "jpeg" or "basic").
- *
- *-- If the compression type is "fill", then the only pixel value follows, in
- * client pixel format (see NOTE 1). This value applies to all pixels of the
- * rectangle.
- *
- *-- If the compression type is "jpeg", the following data stream looks like
- * this:
- *
- * 1..3 bytes: data size (N) in compact representation;
- * N bytes: JPEG image.
- *
- * Data size is compactly represented in one, two or three bytes, according
- * to the following scheme:
- *
- * 0xxxxxxx (for values 0..127)
- * 1xxxxxxx 0yyyyyyy (for values 128..16383)
- * 1xxxxxxx 1yyyyyyy zzzzzzzz (for values 16384..4194303)
- *
- * Here each character denotes one bit, xxxxxxx are the least significant 7
- * bits of the value (bits 0-6), yyyyyyy are bits 7-13, and zzzzzzzz are the
- * most significant 8 bits (bits 14-21). For example, decimal value 10000
- * should be represented as two bytes: binary 10010000 01001110, or
- * hexadecimal 90 4E.
- *
- *-- If the compression type is "basic" and bit 6 of the compression control
- * byte was set to 1, then the next (second) byte specifies "filter id" which
- * tells the decoder what filter type was used by the encoder to pre-process
- * pixel data before the compression. The "filter id" byte can be one of the
- * following:
- *
- * 0: no filter ("copy" filter);
- * 1: "palette" filter;
- * 2: "gradient" filter.
- *
- *-- If bit 6 of the compression control byte is set to 0 (no "filter id"
- * byte), or if the filter id is 0, then raw pixel values in the client
- * format (see NOTE 1) will be compressed. See below details on the
- * compression.
- *
- *-- The "gradient" filter pre-processes pixel data with a simple algorithm
- * which converts each color component to a difference between a "predicted"
- * intensity and the actual intensity. Such a technique does not affect
- * uncompressed data size, but helps to compress photo-like images better.
- * Pseudo-code for converting intensities to differences is the following:
- *
- * P[i,j] := V[i-1,j] + V[i,j-1] - V[i-1,j-1];
- * if (P[i,j] < 0) then P[i,j] := 0;
- * if (P[i,j] > MAX) then P[i,j] := MAX;
- * D[i,j] := V[i,j] - P[i,j];
- *
- * Here V[i,j] is the intensity of a color component for a pixel at
- * coordinates (i,j). MAX is the maximum value of intensity for a color
- * component.
- *
- *-- The "palette" filter converts true-color pixel data to indexed colors
- * and a palette which can consist of 2..256 colors. If the number of colors
- * is 2, then each pixel is encoded in 1 bit, otherwise 8 bits is used to
- * encode one pixel. 1-bit encoding is performed such way that the most
- * significant bits correspond to the leftmost pixels, and each raw of pixels
- * is aligned to the byte boundary. When "palette" filter is used, the
- * palette is sent before the pixel data. The palette begins with an unsigned
- * byte which value is the number of colors in the palette minus 1 (i.e. 1
- * means 2 colors, 255 means 256 colors in the palette). Then follows the
- * palette itself which consist of pixel values in client pixel format (see
- * NOTE 1).
- *
- *-- The pixel data is compressed using the zlib library. But if the data
- * size after applying the filter but before the compression is less then 12,
- * then the data is sent as is, uncompressed. Four separate zlib streams
- * (0..3) can be used and the decoder should read the actual stream id from
- * the compression control byte (see NOTE 2).
- *
- * If the compression is not used, then the pixel data is sent as is,
- * otherwise the data stream looks like this:
- *
- * 1..3 bytes: data size (N) in compact representation;
- * N bytes: zlib-compressed data.
- *
- * Data size is compactly represented in one, two or three bytes, just like
- * in the "jpeg" compression method (see above).
- *
- *-- NOTE 1. If the color depth is 24, and all three color components are
- * 8-bit wide, then one pixel in Tight encoding is always represented by
- * three bytes, where the first byte is red component, the second byte is
- * green component, and the third byte is blue component of the pixel color
- * value. This applies to colors in palettes as well.
- *
- *-- NOTE 2. The decoder must reset compression streams' states before
- * decoding the rectangle, if some of bits 0,1,2,3 in the compression control
- * byte are set to 1. Note that the decoder must reset zlib streams even if
- * the compression type is "fill" or "jpeg".
- *
- *-- NOTE 3. The "gradient" filter and "jpeg" compression may be used only
- * when bits-per-pixel value is either 16 or 32, not 8.
- *
- *-- NOTE 4. The width of any Tight-encoded rectangle cannot exceed 2048
- * pixels. If a rectangle is wider, it must be split into several rectangles
- * and each one should be encoded separately.
- *
- */
-
-#define VNC_TIGHT_EXPLICIT_FILTER 0x04
-#define VNC_TIGHT_FILL 0x08
-#define VNC_TIGHT_JPEG 0x09
-#define VNC_TIGHT_MAX_SUBENCODING 0x09
-
-/* Filters to improve compression efficiency */
-#define VNC_TIGHT_FILTER_COPY 0x00
-#define VNC_TIGHT_FILTER_PALETTE 0x01
-#define VNC_TIGHT_FILTER_GRADIENT 0x02
-
-/* Note: The following constant should not be changed. */
-#define VNC_TIGHT_MIN_TO_COMPRESS 12
-
-/* The parameters below may be adjusted. */
-#define VNC_TIGHT_MIN_SPLIT_RECT_SIZE 4096
-#define VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE 2048
-#define VNC_TIGHT_MAX_SPLIT_TILE_SIZE 16
-
-#define VNC_TIGHT_JPEG_MIN_RECT_SIZE 4096
-#define VNC_TIGHT_DETECT_SUBROW_WIDTH 7
-#define VNC_TIGHT_DETECT_MIN_WIDTH 8
-#define VNC_TIGHT_DETECT_MIN_HEIGHT 8
-
-#endif /* VNC_ENCODING_TIGHT_H */
diff --git a/ui/vnc-encoding-zlib.c b/ui/vnc-encoding-zlib.c
deleted file mode 100644
index a99bc38..0000000
--- a/ui/vnc-encoding-zlib.c
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
- * QEMU VNC display driver: zlib encoding
- *
- * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
- * Copyright (C) 2006 Fabrice Bellard
- * Copyright (C) 2009 Red Hat, Inc
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "vnc.h"
-
-#define ZALLOC_ALIGNMENT 16
-
-void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size)
-{
- void *p;
-
- size *= items;
- size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
-
- p = qemu_mallocz(size);
-
- return (p);
-}
-
-void vnc_zlib_zfree(void *x, void *addr)
-{
- qemu_free(addr);
-}
-
-static void vnc_zlib_start(VncState *vs)
-{
- buffer_reset(&vs->zlib);
-
- // make the output buffer be the zlib buffer, so we can compress it later
- vs->zlib_tmp = vs->output;
- vs->output = vs->zlib;
-}
-
-static int vnc_zlib_stop(VncState *vs)
-{
- z_streamp zstream = &vs->zlib_stream;
- int previous_out;
-
- // switch back to normal output/zlib buffers
- vs->zlib = vs->output;
- vs->output = vs->zlib_tmp;
-
- // compress the zlib buffer
-
- // initialize the stream
- // XXX need one stream per session
- if (zstream->opaque != vs) {
- int err;
-
- VNC_DEBUG("VNC: initializing zlib stream\n");
- VNC_DEBUG("VNC: opaque = %p | vs = %p\n", zstream->opaque, vs);
- zstream->zalloc = vnc_zlib_zalloc;
- zstream->zfree = vnc_zlib_zfree;
-
- err = deflateInit2(zstream, vs->tight_compression, Z_DEFLATED, MAX_WBITS,
- MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY);
-
- if (err != Z_OK) {
- fprintf(stderr, "VNC: error initializing zlib\n");
- return -1;
- }
-
- vs->zlib_level = vs->tight_compression;
- zstream->opaque = vs;
- }
-
- if (vs->tight_compression != vs->zlib_level) {
- if (deflateParams(zstream, vs->tight_compression,
- Z_DEFAULT_STRATEGY) != Z_OK) {
- return -1;
- }
- vs->zlib_level = vs->tight_compression;
- }
-
- // reserve memory in output buffer
- buffer_reserve(&vs->output, vs->zlib.offset + 64);
-
- // set pointers
- zstream->next_in = vs->zlib.buffer;
- zstream->avail_in = vs->zlib.offset;
- zstream->next_out = vs->output.buffer + vs->output.offset;
- zstream->avail_out = vs->output.capacity - vs->output.offset;
- zstream->data_type = Z_BINARY;
- previous_out = zstream->total_out;
-
- // start encoding
- if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
- fprintf(stderr, "VNC: error during zlib compression\n");
- return -1;
- }
-
- vs->output.offset = vs->output.capacity - zstream->avail_out;
- return zstream->total_out - previous_out;
-}
-
-int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
-{
- int old_offset, new_offset, bytes_written;
-
- vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_ZLIB);
-
- // remember where we put in the follow-up size
- old_offset = vs->output.offset;
- vnc_write_s32(vs, 0);
-
- // compress the stream
- vnc_zlib_start(vs);
- vnc_raw_send_framebuffer_update(vs, x, y, w, h);
- bytes_written = vnc_zlib_stop(vs);
-
- if (bytes_written == -1)
- return 0;
-
- // hack in the size
- new_offset = vs->output.offset;
- vs->output.offset = old_offset;
- vnc_write_u32(vs, bytes_written);
- vs->output.offset = new_offset;
-
- return 1;
-}
-
-void vnc_zlib_clear(VncState *vs)
-{
- if (vs->zlib_stream.opaque) {
- deflateEnd(&vs->zlib_stream);
- }
- buffer_free(&vs->zlib);
-}
diff --git a/ui/vnchextile.h b/ui/vnchextile.h
deleted file mode 100644
index b9f9f5e..0000000
--- a/ui/vnchextile.h
+++ /dev/null
@@ -1,211 +0,0 @@
-#define CONCAT_I(a, b) a ## b
-#define CONCAT(a, b) CONCAT_I(a, b)
-#define pixel_t CONCAT(uint, CONCAT(BPP, _t))
-#ifdef GENERIC
-#define NAME CONCAT(generic_, BPP)
-#else
-#define NAME BPP
-#endif
-
-static void CONCAT(send_hextile_tile_, NAME)(VncState *vs,
- int x, int y, int w, int h,
- void *last_bg_,
- void *last_fg_,
- int *has_bg, int *has_fg)
-{
- VncDisplay *vd = vs->vd;
- uint8_t *row = vd->server->data + y * ds_get_linesize(vs->ds) + x * ds_get_bytes_per_pixel(vs->ds);
- pixel_t *irow = (pixel_t *)row;
- int j, i;
- pixel_t *last_bg = (pixel_t *)last_bg_;
- pixel_t *last_fg = (pixel_t *)last_fg_;
- pixel_t bg = 0;
- pixel_t fg = 0;
- int n_colors = 0;
- int bg_count = 0;
- int fg_count = 0;
- int flags = 0;
- uint8_t data[(vs->clientds.pf.bytes_per_pixel + 2) * 16 * 16];
- int n_data = 0;
- int n_subtiles = 0;
-
- for (j = 0; j < h; j++) {
- for (i = 0; i < w; i++) {
- switch (n_colors) {
- case 0:
- bg = irow[i];
- n_colors = 1;
- break;
- case 1:
- if (irow[i] != bg) {
- fg = irow[i];
- n_colors = 2;
- }
- break;
- case 2:
- if (irow[i] != bg && irow[i] != fg) {
- n_colors = 3;
- } else {
- if (irow[i] == bg)
- bg_count++;
- else if (irow[i] == fg)
- fg_count++;
- }
- break;
- default:
- break;
- }
- }
- if (n_colors > 2)
- break;
- irow += ds_get_linesize(vs->ds) / sizeof(pixel_t);
- }
-
- if (n_colors > 1 && fg_count > bg_count) {
- pixel_t tmp = fg;
- fg = bg;
- bg = tmp;
- }
-
- if (!*has_bg || *last_bg != bg) {
- flags |= 0x02;
- *has_bg = 1;
- *last_bg = bg;
- }
-
- if (n_colors < 3 && (!*has_fg || *last_fg != fg)) {
- flags |= 0x04;
- *has_fg = 1;
- *last_fg = fg;
- }
-
- switch (n_colors) {
- case 1:
- n_data = 0;
- break;
- case 2:
- flags |= 0x08;
-
- irow = (pixel_t *)row;
-
- for (j = 0; j < h; j++) {
- int min_x = -1;
- for (i = 0; i < w; i++) {
- if (irow[i] == fg) {
- if (min_x == -1)
- min_x = i;
- } else if (min_x != -1) {
- hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
- n_data += 2;
- n_subtiles++;
- min_x = -1;
- }
- }
- if (min_x != -1) {
- hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
- n_data += 2;
- n_subtiles++;
- }
- irow += ds_get_linesize(vs->ds) / sizeof(pixel_t);
- }
- break;
- case 3:
- flags |= 0x18;
-
- irow = (pixel_t *)row;
-
- if (!*has_bg || *last_bg != bg)
- flags |= 0x02;
-
- for (j = 0; j < h; j++) {
- int has_color = 0;
- int min_x = -1;
- pixel_t color = 0; /* shut up gcc */
-
- for (i = 0; i < w; i++) {
- if (!has_color) {
- if (irow[i] == bg)
- continue;
- color = irow[i];
- min_x = i;
- has_color = 1;
- } else if (irow[i] != color) {
- has_color = 0;
-#ifdef GENERIC
- vnc_convert_pixel(vs, data + n_data, color);
- n_data += vs->clientds.pf.bytes_per_pixel;
-#else
- memcpy(data + n_data, &color, sizeof(color));
- n_data += sizeof(pixel_t);
-#endif
- hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
- n_data += 2;
- n_subtiles++;
-
- min_x = -1;
- if (irow[i] != bg) {
- color = irow[i];
- min_x = i;
- has_color = 1;
- }
- }
- }
- if (has_color) {
-#ifdef GENERIC
- vnc_convert_pixel(vs, data + n_data, color);
- n_data += vs->clientds.pf.bytes_per_pixel;
-#else
- memcpy(data + n_data, &color, sizeof(color));
- n_data += sizeof(pixel_t);
-#endif
- hextile_enc_cord(data + n_data, min_x, j, i - min_x, 1);
- n_data += 2;
- n_subtiles++;
- }
- irow += ds_get_linesize(vs->ds) / sizeof(pixel_t);
- }
-
- /* A SubrectsColoured subtile invalidates the foreground color */
- *has_fg = 0;
- if (n_data > (w * h * sizeof(pixel_t))) {
- n_colors = 4;
- flags = 0x01;
- *has_bg = 0;
-
- /* we really don't have to invalidate either the bg or fg
- but we've lost the old values. oh well. */
- }
- default:
- break;
- }
-
- if (n_colors > 3) {
- flags = 0x01;
- *has_fg = 0;
- *has_bg = 0;
- n_colors = 4;
- }
-
- vnc_write_u8(vs, flags);
- if (n_colors < 4) {
- if (flags & 0x02)
- vs->write_pixels(vs, &vd->server->pf, last_bg, sizeof(pixel_t));
- if (flags & 0x04)
- vs->write_pixels(vs, &vd->server->pf, last_fg, sizeof(pixel_t));
- if (n_subtiles) {
- vnc_write_u8(vs, n_subtiles);
- vnc_write(vs, data, n_data);
- }
- } else {
- for (j = 0; j < h; j++) {
- vs->write_pixels(vs, &vd->server->pf, row,
- w * ds_get_bytes_per_pixel(vs->ds));
- row += ds_get_linesize(vs->ds);
- }
- }
-}
-
-#undef NAME
-#undef pixel_t
-#undef CONCAT_I
-#undef CONCAT
--
1.7.1
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