[Qemu-devel] [PATCH 10/14] pl100: Drop support for depths other than 32bpp.

[Gerd Hoffmann <kraxel@redhat.com>]

DisplaySurfaces created by qemu_create_displaysurface (called indirectly
via by qemu_console_resize) are always 32bpp in host byte order.  So
this is the only format we have to support when converting the guest
framebuffer for the host user interface (i.e. gtk / vnc / ...).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/pl110.c          |  59 +++-----------------
 hw/display/pl110_template.h | 133 ++++++++++++++++++++------------------------
 2 files changed, 67 insertions(+), 125 deletions(-)

diff --git a/hw/display/pl110.c b/hw/display/pl110.c
index c574cf1..78b146b 100644
--- a/hw/display/pl110.c
+++ b/hw/display/pl110.c
@@ -112,15 +112,6 @@ static const unsigned char *idregs[] = {
     pl111_id
 };
 
-#define BITS 8
-#include "pl110_template.h"
-#define BITS 15
-#include "pl110_template.h"
-#define BITS 16
-#include "pl110_template.h"
-#define BITS 24
-#include "pl110_template.h"
-#define BITS 32
 #include "pl110_template.h"
 
 static int pl110_enabled(PL110State *s)
@@ -133,7 +124,6 @@ static void pl110_update_display(void *opaque)
     PL110State *s = (PL110State *)opaque;
     SysBusDevice *sbd;
     DisplaySurface *surface = qemu_console_surface(s->con);
-    drawfn* fntable;
     drawfn fn;
     int dest_width;
     int src_width;
@@ -147,33 +137,6 @@ static void pl110_update_display(void *opaque)
 
     sbd = SYS_BUS_DEVICE(s);
 
-    switch (surface_bits_per_pixel(surface)) {
-    case 0:
-        return;
-    case 8:
-        fntable = pl110_draw_fn_8;
-        dest_width = 1;
-        break;
-    case 15:
-        fntable = pl110_draw_fn_15;
-        dest_width = 2;
-        break;
-    case 16:
-        fntable = pl110_draw_fn_16;
-        dest_width = 2;
-        break;
-    case 24:
-        fntable = pl110_draw_fn_24;
-        dest_width = 3;
-        break;
-    case 32:
-        fntable = pl110_draw_fn_32;
-        dest_width = 4;
-        break;
-    default:
-        fprintf(stderr, "pl110: Bad color depth\n");
-        exit(1);
-    }
     if (s->cr & PL110_CR_BGR)
         bpp_offset = 0;
     else
@@ -208,11 +171,11 @@ static void pl110_update_display(void *opaque)
     }
 
     if (s->cr & PL110_CR_BEBO)
-        fn = fntable[s->bpp + 8 + bpp_offset];
+        fn = pl110_draw_fn[s->bpp + 8 + bpp_offset];
     else if (s->cr & PL110_CR_BEPO)
-        fn = fntable[s->bpp + 16 + bpp_offset];
+        fn = pl110_draw_fn[s->bpp + 16 + bpp_offset];
     else
-        fn = fntable[s->bpp + bpp_offset];
+        fn = pl110_draw_fn[s->bpp + bpp_offset];
 
     src_width = s->cols;
     switch (s->bpp) {
@@ -236,7 +199,9 @@ static void pl110_update_display(void *opaque)
         src_width <<= 2;
         break;
     }
-    dest_width *= s->cols;
+
+    g_assert(surface_bits_per_pixel(surface) == 32);
+    dest_width = 4 * s->cols;
     first = 0;
     framebuffer_update_display(surface, sysbus_address_space(sbd),
                                s->upbase, s->cols, s->rows,
@@ -277,19 +242,11 @@ static void pl110_update_palette(PL110State *s, int n)
         /* The I bit is ignored.  */
         raw >>= 6;
         switch (surface_bits_per_pixel(surface)) {
-        case 8:
-            s->palette[n] = rgb_to_pixel8(r, g, b);
-            break;
-        case 15:
-            s->palette[n] = rgb_to_pixel15(r, g, b);
-            break;
-        case 16:
-            s->palette[n] = rgb_to_pixel16(r, g, b);
-            break;
-        case 24:
         case 32:
             s->palette[n] = rgb_to_pixel32(r, g, b);
             break;
+        default:
+            g_assert_not_reached();
         }
         n++;
     }
diff --git a/hw/display/pl110_template.h b/hw/display/pl110_template.h
index 36ba791..5afc64c 100644
--- a/hw/display/pl110_template.h
+++ b/hw/display/pl110_template.h
@@ -11,22 +11,7 @@
 
 #ifndef ORDER
 
-#if BITS == 8
-#define COPY_PIXEL(to, from) *(to++) = from
-#elif BITS == 15 || BITS == 16
-#define COPY_PIXEL(to, from) do { *(uint16_t *)to = from; to += 2; } while (0)
-#elif BITS == 24
-#define COPY_PIXEL(to, from)    \
-    do {                        \
-        *(to++) = from;         \
-        *(to++) = (from) >> 8;  \
-        *(to++) = (from) >> 16; \
-    } while (0)
-#elif BITS == 32
 #define COPY_PIXEL(to, from) do { *(uint32_t *)to = from; to += 4; } while (0)
-#else
-#error unknown bit depth
-#endif
 
 #undef RGB
 #define BORDER bgr
@@ -47,61 +32,61 @@
 #include "pl110_template.h"
 #undef BORDER
 
-static drawfn glue(pl110_draw_fn_,BITS)[48] =
+static drawfn pl110_draw_fn[48] =
 {
-    glue(pl110_draw_line1_lblp_bgr,BITS),
-    glue(pl110_draw_line2_lblp_bgr,BITS),
-    glue(pl110_draw_line4_lblp_bgr,BITS),
-    glue(pl110_draw_line8_lblp_bgr,BITS),
-    glue(pl110_draw_line16_555_lblp_bgr,BITS),
-    glue(pl110_draw_line32_lblp_bgr,BITS),
-    glue(pl110_draw_line16_lblp_bgr,BITS),
-    glue(pl110_draw_line12_lblp_bgr,BITS),
+    pl110_draw_line1_lblp_bgr,
+    pl110_draw_line2_lblp_bgr,
+    pl110_draw_line4_lblp_bgr,
+    pl110_draw_line8_lblp_bgr,
+    pl110_draw_line16_555_lblp_bgr,
+    pl110_draw_line32_lblp_bgr,
+    pl110_draw_line16_lblp_bgr,
+    pl110_draw_line12_lblp_bgr,
 
-    glue(pl110_draw_line1_bbbp_bgr,BITS),
-    glue(pl110_draw_line2_bbbp_bgr,BITS),
-    glue(pl110_draw_line4_bbbp_bgr,BITS),
-    glue(pl110_draw_line8_bbbp_bgr,BITS),
-    glue(pl110_draw_line16_555_bbbp_bgr,BITS),
-    glue(pl110_draw_line32_bbbp_bgr,BITS),
-    glue(pl110_draw_line16_bbbp_bgr,BITS),
-    glue(pl110_draw_line12_bbbp_bgr,BITS),
+    pl110_draw_line1_bbbp_bgr,
+    pl110_draw_line2_bbbp_bgr,
+    pl110_draw_line4_bbbp_bgr,
+    pl110_draw_line8_bbbp_bgr,
+    pl110_draw_line16_555_bbbp_bgr,
+    pl110_draw_line32_bbbp_bgr,
+    pl110_draw_line16_bbbp_bgr,
+    pl110_draw_line12_bbbp_bgr,
 
-    glue(pl110_draw_line1_lbbp_bgr,BITS),
-    glue(pl110_draw_line2_lbbp_bgr,BITS),
-    glue(pl110_draw_line4_lbbp_bgr,BITS),
-    glue(pl110_draw_line8_lbbp_bgr,BITS),
-    glue(pl110_draw_line16_555_lbbp_bgr,BITS),
-    glue(pl110_draw_line32_lbbp_bgr,BITS),
-    glue(pl110_draw_line16_lbbp_bgr,BITS),
-    glue(pl110_draw_line12_lbbp_bgr,BITS),
+    pl110_draw_line1_lbbp_bgr,
+    pl110_draw_line2_lbbp_bgr,
+    pl110_draw_line4_lbbp_bgr,
+    pl110_draw_line8_lbbp_bgr,
+    pl110_draw_line16_555_lbbp_bgr,
+    pl110_draw_line32_lbbp_bgr,
+    pl110_draw_line16_lbbp_bgr,
+    pl110_draw_line12_lbbp_bgr,
 
-    glue(pl110_draw_line1_lblp_rgb,BITS),
-    glue(pl110_draw_line2_lblp_rgb,BITS),
-    glue(pl110_draw_line4_lblp_rgb,BITS),
-    glue(pl110_draw_line8_lblp_rgb,BITS),
-    glue(pl110_draw_line16_555_lblp_rgb,BITS),
-    glue(pl110_draw_line32_lblp_rgb,BITS),
-    glue(pl110_draw_line16_lblp_rgb,BITS),
-    glue(pl110_draw_line12_lblp_rgb,BITS),
+    pl110_draw_line1_lblp_rgb,
+    pl110_draw_line2_lblp_rgb,
+    pl110_draw_line4_lblp_rgb,
+    pl110_draw_line8_lblp_rgb,
+    pl110_draw_line16_555_lblp_rgb,
+    pl110_draw_line32_lblp_rgb,
+    pl110_draw_line16_lblp_rgb,
+    pl110_draw_line12_lblp_rgb,
 
-    glue(pl110_draw_line1_bbbp_rgb,BITS),
-    glue(pl110_draw_line2_bbbp_rgb,BITS),
-    glue(pl110_draw_line4_bbbp_rgb,BITS),
-    glue(pl110_draw_line8_bbbp_rgb,BITS),
-    glue(pl110_draw_line16_555_bbbp_rgb,BITS),
-    glue(pl110_draw_line32_bbbp_rgb,BITS),
-    glue(pl110_draw_line16_bbbp_rgb,BITS),
-    glue(pl110_draw_line12_bbbp_rgb,BITS),
+    pl110_draw_line1_bbbp_rgb,
+    pl110_draw_line2_bbbp_rgb,
+    pl110_draw_line4_bbbp_rgb,
+    pl110_draw_line8_bbbp_rgb,
+    pl110_draw_line16_555_bbbp_rgb,
+    pl110_draw_line32_bbbp_rgb,
+    pl110_draw_line16_bbbp_rgb,
+    pl110_draw_line12_bbbp_rgb,
 
-    glue(pl110_draw_line1_lbbp_rgb,BITS),
-    glue(pl110_draw_line2_lbbp_rgb,BITS),
-    glue(pl110_draw_line4_lbbp_rgb,BITS),
-    glue(pl110_draw_line8_lbbp_rgb,BITS),
-    glue(pl110_draw_line16_555_lbbp_rgb,BITS),
-    glue(pl110_draw_line32_lbbp_rgb,BITS),
-    glue(pl110_draw_line16_lbbp_rgb,BITS),
-    glue(pl110_draw_line12_lbbp_rgb,BITS),
+    pl110_draw_line1_lbbp_rgb,
+    pl110_draw_line2_lbbp_rgb,
+    pl110_draw_line4_lbbp_rgb,
+    pl110_draw_line8_lbbp_rgb,
+    pl110_draw_line16_555_lbbp_rgb,
+    pl110_draw_line32_lbbp_rgb,
+    pl110_draw_line16_lbbp_rgb,
+    pl110_draw_line12_lbbp_rgb,
 };
 
 #undef BITS
@@ -110,18 +95,18 @@ static drawfn glue(pl110_draw_fn_,BITS)[48] =
 #else
 
 #if ORDER == 0
-#define NAME glue(glue(lblp_, BORDER), BITS)
+#define NAME glue(lblp_, BORDER)
 #ifdef HOST_WORDS_BIGENDIAN
 #define SWAP_WORDS 1
 #endif
 #elif ORDER == 1
-#define NAME glue(glue(bbbp_, BORDER), BITS)
+#define NAME glue(bbbp_, BORDER)
 #ifndef HOST_WORDS_BIGENDIAN
 #define SWAP_WORDS 1
 #endif
 #else
 #define SWAP_PIXELS 1
-#define NAME glue(glue(lbbp_, BORDER), BITS)
+#define NAME glue(lbbp_, BORDER)
 #ifdef HOST_WORDS_BIGENDIAN
 #define SWAP_WORDS 1
 #endif
@@ -270,14 +255,14 @@ static void glue(pl110_draw_line16_,NAME)(void *opaque, uint8_t *d, const uint8_
         MSB = (data & 0x1f) << 3;
         data >>= 5;
 #endif
-        COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
+        COPY_PIXEL(d, rgb_to_pixel32(r, g, b));
         LSB = (data & 0x1f) << 3;
         data >>= 5;
         g = (data & 0x3f) << 2;
         data >>= 6;
         MSB = (data & 0x1f) << 3;
         data >>= 5;
-        COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
+        COPY_PIXEL(d, rgb_to_pixel32(r, g, b));
 #undef MSB
 #undef LSB
         width -= 2;
@@ -307,7 +292,7 @@ static void glue(pl110_draw_line32_,NAME)(void *opaque, uint8_t *d, const uint8_
         g = (data >> 16) & 0xff;
         MSB = (data >> 8) & 0xff;
 #endif
-        COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
+        COPY_PIXEL(d, rgb_to_pixel32(r, g, b));
 #undef MSB
 #undef LSB
         width--;
@@ -338,14 +323,14 @@ static void glue(pl110_draw_line16_555_,NAME)(void *opaque, uint8_t *d, const ui
         data >>= 5;
         MSB = (data & 0x1f) << 3;
         data >>= 5;
-        COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
+        COPY_PIXEL(d, rgb_to_pixel32(r, g, b));
         LSB = (data & 0x1f) << 3;
         data >>= 5;
         g = (data & 0x1f) << 3;
         data >>= 5;
         MSB = (data & 0x1f) << 3;
         data >>= 6;
-        COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
+        COPY_PIXEL(d, rgb_to_pixel32(r, g, b));
 #undef MSB
 #undef LSB
         width -= 2;
@@ -376,14 +361,14 @@ static void glue(pl110_draw_line12_,NAME)(void *opaque, uint8_t *d, const uint8_
         data >>= 4;
         MSB = (data & 0xf) << 4;
         data >>= 8;
-        COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
+        COPY_PIXEL(d, rgb_to_pixel32(r, g, b));
         LSB = (data & 0xf) << 4;
         data >>= 4;
         g = (data & 0xf) << 4;
         data >>= 4;
         MSB = (data & 0xf) << 4;
         data >>= 8;
-        COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
+        COPY_PIXEL(d, rgb_to_pixel32(r, g, b));
 #undef MSB
 #undef LSB
         width -= 2;
-- 
1.8.3.1