[Qemu-devel] [PATCH 0/4] sdl2: opengl rendering

[Qemu-devel] [PATCH 0/4] sdl2: opengl rendering

[Gerd Hoffmann]

  Hi,

Finally getting back to work on opengl support.  So here is the next
round of the sdl2 opengl patches.  Series applies cleanly on top of the
sdl pull request sent earlier today.

please review,
  Gerd

Gerd Hoffmann (4):
  opengl: some shader infrastructure
  console-gl: add opengl rendering helper functions
  sdl2: move SDL_* includes to sdl2.h
  sdl2: add support for display rendering using opengl.

 Makefile                    |  17 +++
 configure                   |   2 +-
 include/ui/console.h        |  32 ++++++
 include/ui/sdl2.h           |  17 +++
 scripts/shaderinclude.pl    |  16 +++
 ui/Makefile.objs            |   8 ++
 ui/console-gl.c             | 253 ++++++++++++++++++++++++++++++++++++++++++++
 ui/sdl.c                    |  10 ++
 ui/sdl2-2d.c                |  13 +--
 ui/sdl2-gl.c                | 112 ++++++++++++++++++++
 ui/sdl2-input.c             |   6 --
 ui/sdl2.c                   |  71 ++++++++++---
 ui/shader/texture-blit.frag |  10 ++
 ui/shader/texture-blit.vert |  10 ++
 vl.c                        |  23 ++++
 15 files changed, 574 insertions(+), 26 deletions(-)
 create mode 100644 scripts/shaderinclude.pl
 create mode 100644 ui/console-gl.c
 create mode 100644 ui/sdl2-gl.c
 create mode 100644 ui/shader/texture-blit.frag
 create mode 100644 ui/shader/texture-blit.vert

-- 
1.8.3.1

[Qemu-devel] [PATCH 1/4] opengl: some shader infrastructure

[Gerd Hoffmann]

---
 Makefile                 | 14 ++++++++++++++
 scripts/shaderinclude.pl | 16 ++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 scripts/shaderinclude.pl

diff --git a/Makefile b/Makefile
index 6817c6f..285eb27 100644
--- a/Makefile
+++ b/Makefile
@@ -292,6 +292,7 @@ clean:
 	rm -f fsdev/*.pod
 	rm -rf .libs */.libs
 	rm -f qemu-img-cmds.h
+	rm -f ui/shader/*-vert.h ui/shader/*-frag.h
 	@# May not be present in GENERATED_HEADERS
 	rm -f trace/generated-tracers-dtrace.dtrace*
 	rm -f trace/generated-tracers-dtrace.h*
@@ -437,6 +438,19 @@ cscope:
 	find "$(SRC_PATH)" -name "*.[chsS]" -print | sed 's,^\./,,' > ./cscope.files
 	cscope -b
 
+# opengl shader programs
+ui/shader/%-vert.h: $(SRC_PATH)/ui/shader/%.vert $(SRC_PATH)/scripts/shaderinclude.pl
+	@mkdir -p $(dir $@)
+	$(call quiet-command,\
+		perl $(SRC_PATH)/scripts/shaderinclude.pl $< > $@,\
+		"  VERT  $@")
+
+ui/shader/%-frag.h: $(SRC_PATH)/ui/shader/%.frag $(SRC_PATH)/scripts/shaderinclude.pl
+	@mkdir -p $(dir $@)
+	$(call quiet-command,\
+		perl $(SRC_PATH)/scripts/shaderinclude.pl $< > $@,\
+		"  FRAG  $@")
+
 # documentation
 MAKEINFO=makeinfo
 MAKEINFOFLAGS=--no-headers --no-split --number-sections
diff --git a/scripts/shaderinclude.pl b/scripts/shaderinclude.pl
new file mode 100644
index 0000000..81b5146
--- /dev/null
+++ b/scripts/shaderinclude.pl
@@ -0,0 +1,16 @@
+#!/usr/bin/perl
+use strict;
+use warnings;
+
+my $file = shift;
+open FILE, "<", $file or die "open $file: $!";
+my $name = $file;
+$name =~ s|.*/||;
+$name =~ s/[-.]/_/g;
+print "static GLchar ${name}_src[] =\n";
+while (<FILE>) {
+    chomp;
+    printf "    \"%s\\n\"\n", $_;
+}
+print "    \"\\n\";\n";
+close FILE;
-- 
1.8.3.1

[Qemu-devel] [PATCH 2/4] console-gl: add opengl rendering helper functions

[Gerd Hoffmann]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 Makefile                    |   3 +
 configure                   |   2 +-
 include/ui/console.h        |  31 ++++++
 ui/Makefile.objs            |   5 +
 ui/console-gl.c             | 253 ++++++++++++++++++++++++++++++++++++++++++++
 ui/shader/texture-blit.frag |  10 ++
 ui/shader/texture-blit.vert |  10 ++
 7 files changed, 313 insertions(+), 1 deletion(-)
 create mode 100644 ui/console-gl.c
 create mode 100644 ui/shader/texture-blit.frag
 create mode 100644 ui/shader/texture-blit.vert

diff --git a/Makefile b/Makefile
index 285eb27..6d77782 100644
--- a/Makefile
+++ b/Makefile
@@ -451,6 +451,9 @@ ui/shader/%-frag.h: $(SRC_PATH)/ui/shader/%.frag $(SRC_PATH)/scripts/shaderinclu
 		perl $(SRC_PATH)/scripts/shaderinclude.pl $< > $@,\
 		"  FRAG  $@")
 
+ui/console-gl.o: $(SRC_PATH)/ui/console-gl.c \
+	ui/shader/texture-blit-vert.h ui/shader/texture-blit-frag.h
+
 # documentation
 MAKEINFO=makeinfo
 MAKEINFOFLAGS=--no-headers --no-split --number-sections
diff --git a/configure b/configure
index a071bbb..8447c14 100755
--- a/configure
+++ b/configure
@@ -3120,7 +3120,7 @@ libs_softmmu="$libs_softmmu $fdt_libs"
 ##########################################
 # opengl probe (for sdl2, milkymist-tmu2)
 if test "$opengl" != "no" ; then
-  opengl_pkgs="gl"
+  opengl_pkgs="gl glesv2"
   if $pkg_config $opengl_pkgs x11; then
     opengl_cflags="$($pkg_config --libs $opengl_pkgs) $x11_cflags"
     opengl_libs="$($pkg_config --libs $opengl_pkgs) $x11_libs"
diff --git a/include/ui/console.h b/include/ui/console.h
index 0f97d86..5b31492 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -9,6 +9,11 @@
 #include "qapi-types.h"
 #include "qapi/error.h"
 
+#ifdef CONFIG_OPENGL
+# include <GLES2/gl2.h>
+# include <GLES2/gl2ext.h>
+#endif
+
 /* keyboard/mouse support */
 
 #define MOUSE_EVENT_LBUTTON 0x01
@@ -118,6 +123,11 @@ struct DisplaySurface {
     pixman_format_code_t format;
     pixman_image_t *image;
     uint8_t flags;
+#ifdef CONFIG_OPENGL
+    GLenum glformat;
+    GLenum gltype;
+    GLuint texture;
+#endif
 };
 
 typedef struct QemuUIInfo {
@@ -324,6 +334,27 @@ void qemu_console_copy(QemuConsole *con, int src_x, int src_y,
 DisplaySurface *qemu_console_surface(QemuConsole *con);
 DisplayState *qemu_console_displaystate(QemuConsole *console);
 
+/* console-gl.c */
+typedef struct ConsoleGLState ConsoleGLState;
+#ifdef CONFIG_OPENGL
+ConsoleGLState *console_gl_init_context(void);
+void console_gl_fini_context(ConsoleGLState *gls);
+bool console_gl_check_format(DisplayChangeListener *dcl,
+                             pixman_format_code_t format);
+void surface_gl_create_texture(ConsoleGLState *gls,
+                               DisplaySurface *surface);
+void surface_gl_update_texture(ConsoleGLState *gls,
+                               DisplaySurface *surface,
+                               int x, int y, int w, int h);
+void surface_gl_render_texture(ConsoleGLState *gls,
+                               DisplaySurface *surface);
+void surface_gl_destroy_texture(ConsoleGLState *gls,
+                               DisplaySurface *surface);
+void surface_gl_setup_viewport(ConsoleGLState *gls,
+                               DisplaySurface *surface,
+                               int ww, int wh);
+#endif
+
 /* sdl.c */
 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame);
 
diff --git a/ui/Makefile.objs b/ui/Makefile.objs
index 13b5cfb..3173778 100644
--- a/ui/Makefile.objs
+++ b/ui/Makefile.objs
@@ -24,4 +24,9 @@ sdl.mo-objs := sdl2.o sdl2-input.o sdl2-2d.o
 endif
 sdl.mo-cflags := $(SDL_CFLAGS)
 
+ifeq ($(CONFIG_OPENGL),y)
+common-obj-y += console-gl.o
+libs_softmmu += $(OPENGL_LIBS)
+endif
+
 gtk.o-cflags := $(GTK_CFLAGS) $(VTE_CFLAGS)
diff --git a/ui/console-gl.c b/ui/console-gl.c
new file mode 100644
index 0000000..36951b9
--- /dev/null
+++ b/ui/console-gl.c
@@ -0,0 +1,253 @@
+/*
+ * QEMU graphical console -- opengl helper bits
+ *
+ * Copyright (c) 2014 Red Hat
+ *
+ * Authors:
+ *    Gerd Hoffmann <kraxel@redhat.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"
+#include "ui/console.h"
+
+struct ConsoleGLState {
+    GLint texture_blit_prog;
+};
+
+/* ---------------------------------------------------------------------- */
+
+#include "shader/texture-blit-vert.h"
+#include "shader/texture-blit-frag.h"
+
+static void gl_run_texture_blit(ConsoleGLState *gls)
+{
+    GLfloat in_position[] = {
+        -1, -1,
+        1,  -1,
+        -1,  1,
+        1,   1,
+    };
+    GLint l_position;
+
+    glUseProgram(gls->texture_blit_prog);
+    l_position = glGetAttribLocation(gls->texture_blit_prog, "in_position");
+    glVertexAttribPointer(l_position, 2, GL_FLOAT, GL_FALSE, 0, in_position);
+    glEnableVertexAttribArray(l_position);
+    glDrawArrays(GL_TRIANGLE_STRIP, l_position, 4);
+}
+
+/* ---------------------------------------------------------------------- */
+
+static GLuint gl_create_compile_shader(GLenum type, const GLchar *src)
+{
+    GLuint shader;
+    GLint status, length;
+    char *errmsg;
+
+    shader = glCreateShader(type);
+    glShaderSource(shader, 1, &src, 0);
+    glCompileShader(shader);
+
+    glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
+    if (!status) {
+        glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length);
+        errmsg = malloc(length);
+        glGetShaderInfoLog(shader, length, &length, errmsg);
+        fprintf(stderr, "%s: compile %s error\n%s\n", __func__,
+                (type == GL_VERTEX_SHADER) ? "vertex" : "fragment",
+                errmsg);
+        free(errmsg);
+        return 0;
+    }
+    return shader;
+}
+
+static GLuint gl_create_link_program(GLuint vert, GLuint frag)
+{
+    GLuint program;
+    GLint status, length;
+    char *errmsg;
+
+    program = glCreateProgram();
+    glAttachShader(program, vert);
+    glAttachShader(program, frag);
+    glLinkProgram(program);
+
+    glGetProgramiv(program, GL_LINK_STATUS, &status);
+    if (!status) {
+        glGetProgramiv(program, GL_INFO_LOG_LENGTH, &length);
+        errmsg = malloc(length);
+        glGetProgramInfoLog(program, length, &length, errmsg);
+        fprintf(stderr, "%s: link program: %s\n", __func__, errmsg);
+        free(errmsg);
+        return 0;
+    }
+    return program;
+}
+
+static GLuint gl_create_compile_link_program(const GLchar *vert_src,
+                                             const GLchar *frag_src)
+{
+    GLuint vert_shader, frag_shader, program;
+
+    vert_shader = gl_create_compile_shader(GL_VERTEX_SHADER, vert_src);
+    frag_shader = gl_create_compile_shader(GL_FRAGMENT_SHADER, frag_src);
+    if (!vert_shader || !frag_shader) {
+        return 0;
+    }
+
+    program = gl_create_link_program(vert_shader, frag_shader);
+    glDeleteShader(vert_shader);
+    glDeleteShader(frag_shader);
+
+    return program;
+}
+
+/* ---------------------------------------------------------------------- */
+
+ConsoleGLState *console_gl_init_context(void)
+{
+    ConsoleGLState *gls = g_new0(ConsoleGLState, 1);
+
+    gls->texture_blit_prog = gl_create_compile_link_program
+        (texture_blit_vert_src, texture_blit_frag_src);
+    if (!gls->texture_blit_prog) {
+        exit(1);
+    }
+
+    return gls;
+}
+
+void console_gl_fini_context(ConsoleGLState *gls)
+{
+    if (!gls) {
+        return;
+    }
+    g_free(gls);
+}
+
+bool console_gl_check_format(DisplayChangeListener *dcl,
+                             pixman_format_code_t format)
+{
+    switch (format) {
+    case PIXMAN_BE_b8g8r8x8:
+    case PIXMAN_BE_b8g8r8a8:
+    case PIXMAN_r5g6b5:
+        return true;
+    default:
+        return false;
+    }
+}
+
+void surface_gl_create_texture(ConsoleGLState *gls,
+                               DisplaySurface *surface)
+{
+    assert(gls);
+    assert(surface_stride(surface) % surface_bytes_per_pixel(surface) == 0);
+
+    switch (surface->format) {
+    case PIXMAN_BE_b8g8r8x8:
+    case PIXMAN_BE_b8g8r8a8:
+        surface->glformat = GL_BGRA_EXT;
+        surface->gltype = GL_UNSIGNED_BYTE;
+        break;
+    case PIXMAN_r5g6b5:
+        surface->glformat = GL_RGB;
+        surface->gltype = GL_UNSIGNED_SHORT_5_6_5;
+        break;
+    default:
+        g_assert_not_reached();
+    }
+
+    glGenTextures(1, &surface->texture);
+    glEnable(GL_TEXTURE_2D);
+    glBindTexture(GL_TEXTURE_2D, surface->texture);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
+                  surface_stride(surface) / surface_bytes_per_pixel(surface));
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
+                 surface_width(surface),
+                 surface_height(surface),
+                 0, surface->glformat, surface->gltype,
+                 surface_data(surface));
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+}
+
+void surface_gl_update_texture(ConsoleGLState *gls,
+                               DisplaySurface *surface,
+                               int x, int y, int w, int h)
+{
+    uint8_t *data = (void *)surface_data(surface);
+
+    assert(gls);
+
+    glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT,
+                  surface_stride(surface) / surface_bytes_per_pixel(surface));
+    glTexSubImage2D(GL_TEXTURE_2D, 0,
+                    x, y, w, h,
+                    surface->glformat, surface->gltype,
+                    data + surface_stride(surface) * y
+                    + surface_bytes_per_pixel(surface) * x);
+}
+
+void surface_gl_render_texture(ConsoleGLState *gls,
+                               DisplaySurface *surface)
+{
+    assert(gls);
+
+    glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    gl_run_texture_blit(gls);
+}
+
+void surface_gl_destroy_texture(ConsoleGLState *gls,
+                                DisplaySurface *surface)
+{
+    if (!surface || !surface->texture) {
+        return;
+    }
+    glDeleteTextures(1, &surface->texture);
+    surface->texture = 0;
+}
+
+void surface_gl_setup_viewport(ConsoleGLState *gls,
+                               DisplaySurface *surface,
+                               int ww, int wh)
+{
+    int gw, gh, stripe;
+    float sw, sh;
+
+    assert(gls);
+
+    gw = surface_width(surface);
+    gh = surface_height(surface);
+
+    sw = (float)ww/gw;
+    sh = (float)wh/gh;
+    if (sw < sh) {
+        stripe = wh - wh*sw/sh;
+        glViewport(0, stripe / 2, ww, wh - stripe);
+    } else {
+        stripe = ww - ww*sh/sw;
+        glViewport(stripe / 2, 0, ww - stripe, wh);
+    }
+}
diff --git a/ui/shader/texture-blit.frag b/ui/shader/texture-blit.frag
new file mode 100644
index 0000000..bfa202c
--- /dev/null
+++ b/ui/shader/texture-blit.frag
@@ -0,0 +1,10 @@
+
+#version 300 es
+
+uniform sampler2D image;
+in  mediump vec2 ex_tex_coord;
+out mediump vec4 out_frag_color;
+
+void main(void) {
+     out_frag_color = texture(image, ex_tex_coord);
+}
diff --git a/ui/shader/texture-blit.vert b/ui/shader/texture-blit.vert
new file mode 100644
index 0000000..6fe2744
--- /dev/null
+++ b/ui/shader/texture-blit.vert
@@ -0,0 +1,10 @@
+
+#version 300 es
+
+in vec2  in_position;
+out vec2 ex_tex_coord;
+
+void main(void) {
+    gl_Position = vec4(in_position, 0.0, 1.0);
+    ex_tex_coord = vec2(1.0 + in_position.x, 1.0 - in_position.y) * 0.5;
+}
-- 
1.8.3.1

[Qemu-devel] [PATCH 3/4] sdl2: move SDL_* includes to sdl2.h

[Gerd Hoffmann]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
---
 include/ui/sdl2.h | 6 ++++++
 ui/sdl2-2d.c      | 6 ------
 ui/sdl2-input.c   | 6 ------
 ui/sdl2.c         | 6 ------
 4 files changed, 6 insertions(+), 18 deletions(-)

diff --git a/include/ui/sdl2.h b/include/ui/sdl2.h
index 51fff2e..e21783a 100644
--- a/include/ui/sdl2.h
+++ b/include/ui/sdl2.h
@@ -1,6 +1,12 @@
 #ifndef SDL2_H
 #define SDL2_H
 
+/* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
+#undef WIN32_LEAN_AND_MEAN
+
+#include <SDL.h>
+#include <SDL_syswm.h>
+
 struct sdl2_console {
     DisplayChangeListener dcl;
     DisplaySurface *surface;
diff --git a/ui/sdl2-2d.c b/ui/sdl2-2d.c
index f907c21..46ef5f7 100644
--- a/ui/sdl2-2d.c
+++ b/ui/sdl2-2d.c
@@ -23,12 +23,6 @@
  */
 /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */
 
-/* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
-#undef WIN32_LEAN_AND_MEAN
-
-#include <SDL.h>
-#include <SDL_syswm.h>
-
 #include "qemu-common.h"
 #include "ui/console.h"
 #include "ui/input.h"
diff --git a/ui/sdl2-input.c b/ui/sdl2-input.c
index a1973fc..ac5dc94 100644
--- a/ui/sdl2-input.c
+++ b/ui/sdl2-input.c
@@ -23,12 +23,6 @@
  */
 /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */
 
-/* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
-#undef WIN32_LEAN_AND_MEAN
-
-#include <SDL.h>
-#include <SDL_syswm.h>
-
 #include "qemu-common.h"
 #include "ui/console.h"
 #include "ui/input.h"
diff --git a/ui/sdl2.c b/ui/sdl2.c
index 60e3c3b..610ddb0 100644
--- a/ui/sdl2.c
+++ b/ui/sdl2.c
@@ -23,12 +23,6 @@
  */
 /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */
 
-/* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
-#undef WIN32_LEAN_AND_MEAN
-
-#include <SDL.h>
-#include <SDL_syswm.h>
-
 #include "qemu-common.h"
 #include "ui/console.h"
 #include "ui/input.h"
-- 
1.8.3.1

[Qemu-devel] [PATCH 4/4] sdl2: add support for display rendering using opengl.

[Gerd Hoffmann]

Add new sdl2-gl.c file, with display
rendering functions using opengl.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/console.h |   1 +
 include/ui/sdl2.h    |  11 +++++
 ui/Makefile.objs     |   3 ++
 ui/sdl.c             |  10 +++++
 ui/sdl2-2d.c         |   7 ++++
 ui/sdl2-gl.c         | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++
 ui/sdl2.c            |  65 ++++++++++++++++++++++++++----
 vl.c                 |  23 +++++++++++
 8 files changed, 225 insertions(+), 7 deletions(-)
 create mode 100644 ui/sdl2-gl.c

diff --git a/include/ui/console.h b/include/ui/console.h
index 5b31492..b80c0a8 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -356,6 +356,7 @@ void surface_gl_setup_viewport(ConsoleGLState *gls,
 #endif
 
 /* sdl.c */
+void sdl_display_early_init(int opengl);
 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame);
 
 /* cocoa.m */
diff --git a/include/ui/sdl2.h b/include/ui/sdl2.h
index e21783a..2fdad8f 100644
--- a/include/ui/sdl2.h
+++ b/include/ui/sdl2.h
@@ -17,6 +17,10 @@ struct sdl2_console {
     int last_vm_running; /* per console for caption reasons */
     int x, y;
     int hidden;
+    int opengl;
+    int updates;
+    SDL_GLContext winctx;
+    ConsoleGLState *gls;
 };
 
 void sdl2_window_create(struct sdl2_console *scon);
@@ -37,4 +41,11 @@ void sdl2_2d_redraw(struct sdl2_console *scon);
 bool sdl2_2d_check_format(DisplayChangeListener *dcl,
                           pixman_format_code_t format);
 
+void sdl2_gl_update(DisplayChangeListener *dcl,
+                    int x, int y, int w, int h);
+void sdl2_gl_switch(DisplayChangeListener *dcl,
+                    DisplaySurface *new_surface);
+void sdl2_gl_refresh(DisplayChangeListener *dcl);
+void sdl2_gl_redraw(struct sdl2_console *scon);
+
 #endif /* SDL2_H */
diff --git a/ui/Makefile.objs b/ui/Makefile.objs
index 3173778..a88f730 100644
--- a/ui/Makefile.objs
+++ b/ui/Makefile.objs
@@ -21,6 +21,9 @@ sdl.mo-objs := sdl.o sdl_zoom.o
 endif
 ifeq ($(CONFIG_SDLABI),2.0)
 sdl.mo-objs := sdl2.o sdl2-input.o sdl2-2d.o
+ifeq ($(CONFIG_OPENGL),y)
+sdl.mo-objs += sdl2-gl.o
+endif
 endif
 sdl.mo-cflags := $(SDL_CFLAGS)
 
diff --git a/ui/sdl.c b/ui/sdl.c
index 8bdbf52..3be2910 100644
--- a/ui/sdl.c
+++ b/ui/sdl.c
@@ -908,6 +908,16 @@ static const DisplayChangeListenerOps dcl_ops = {
     .dpy_cursor_define    = sdl_mouse_define,
 };
 
+void sdl_display_early_init(int opengl)
+{
+    if (opengl == 1 /* on */) {
+        fprintf(stderr,
+                "SDL1 display code has no opengl support.\n"
+                "Please recompile qemu with SDL2, using\n"
+                "./configure --enable-sdl --with-sdlabi=2.0\n");
+    }
+}
+
 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 {
     int flags;
diff --git a/ui/sdl2-2d.c b/ui/sdl2-2d.c
index 46ef5f7..bb56747 100644
--- a/ui/sdl2-2d.c
+++ b/ui/sdl2-2d.c
@@ -36,6 +36,8 @@ void sdl2_2d_update(DisplayChangeListener *dcl,
     DisplaySurface *surf = qemu_console_surface(dcl->con);
     SDL_Rect rect;
 
+    assert(!scon->opengl);
+
     if (!surf) {
         return;
     }
@@ -61,6 +63,8 @@ void sdl2_2d_switch(DisplayChangeListener *dcl,
     DisplaySurface *old_surface = scon->surface;
     int format = 0;
 
+    assert(!scon->opengl);
+
     scon->surface = new_surface;
 
     if (scon->texture) {
@@ -101,12 +105,15 @@ void sdl2_2d_refresh(DisplayChangeListener *dcl)
 {
     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 
+    assert(!scon->opengl);
     graphic_hw_update(dcl->con);
     sdl2_poll_events(scon);
 }
 
 void sdl2_2d_redraw(struct sdl2_console *scon)
 {
+    assert(!scon->opengl);
+
     if (!scon->surface) {
         return;
     }
diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c
new file mode 100644
index 0000000..b604c06
--- /dev/null
+++ b/ui/sdl2-gl.c
@@ -0,0 +1,112 @@
+/*
+ * QEMU SDL display driver -- opengl support
+ *
+ * Copyright (c) 2014 Red Hat
+ *
+ * Authors:
+ *     Gerd Hoffmann <kraxel@redhat.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"
+#include "ui/console.h"
+#include "ui/input.h"
+#include "ui/sdl2.h"
+#include "sysemu/sysemu.h"
+
+static void sdl2_gl_render_surface(struct sdl2_console *scon)
+{
+    int ww, wh;
+
+    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
+
+    SDL_GetWindowSize(scon->real_window, &ww, &wh);
+    surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);
+
+    surface_gl_render_texture(scon->gls, scon->surface);
+    SDL_GL_SwapWindow(scon->real_window);
+}
+
+void sdl2_gl_update(DisplayChangeListener *dcl,
+                    int x, int y, int w, int h)
+{
+    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
+
+    assert(scon->opengl);
+
+    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
+    surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h);
+    scon->updates++;
+}
+
+void sdl2_gl_switch(DisplayChangeListener *dcl,
+                    DisplaySurface *new_surface)
+{
+    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
+    DisplaySurface *old_surface = scon->surface;
+
+    assert(scon->opengl);
+
+    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
+    surface_gl_destroy_texture(scon->gls, scon->surface);
+
+    scon->surface = new_surface;
+
+    if (!new_surface) {
+        console_gl_fini_context(scon->gls);
+        scon->gls = NULL;
+        sdl2_window_destroy(scon);
+        return;
+    }
+
+    if (!scon->real_window) {
+        sdl2_window_create(scon);
+        scon->gls = console_gl_init_context();
+    } else if (old_surface &&
+               ((surface_width(old_surface)  != surface_width(new_surface)) ||
+                (surface_height(old_surface) != surface_height(new_surface)))) {
+        sdl2_window_resize(scon);
+    }
+
+    surface_gl_create_texture(scon->gls, scon->surface);
+}
+
+void sdl2_gl_refresh(DisplayChangeListener *dcl)
+{
+    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
+
+    assert(scon->opengl);
+
+    graphic_hw_update(dcl->con);
+    if (scon->updates && scon->surface) {
+        scon->updates = 0;
+        sdl2_gl_render_surface(scon);
+    }
+    sdl2_poll_events(scon);
+}
+
+void sdl2_gl_redraw(struct sdl2_console *scon)
+{
+    assert(scon->opengl);
+
+    if (scon->surface) {
+        sdl2_gl_render_surface(scon);
+    }
+}
diff --git a/ui/sdl2.c b/ui/sdl2.c
index 610ddb0..2d60179 100644
--- a/ui/sdl2.c
+++ b/ui/sdl2.c
@@ -86,6 +86,9 @@ void sdl2_window_create(struct sdl2_console *scon)
                                          surface_height(scon->surface),
                                          flags);
     scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
+    if (scon->opengl) {
+        scon->winctx = SDL_GL_GetCurrentContext();
+    }
     sdl_update_caption(scon);
 }
 
@@ -112,6 +115,17 @@ void sdl2_window_resize(struct sdl2_console *scon)
                       surface_height(scon->surface));
 }
 
+static void sdl2_redraw(struct sdl2_console *scon)
+{
+    if (scon->opengl) {
+#ifdef CONFIG_OPENGL
+        sdl2_gl_redraw(scon);
+#endif
+    } else {
+        sdl2_2d_redraw(scon);
+    }
+}
+
 static void sdl_update_caption(struct sdl2_console *scon)
 {
     char win_title[1024];
@@ -310,7 +324,7 @@ static void toggle_full_screen(struct sdl2_console *scon)
         }
         SDL_SetWindowFullscreen(scon->real_window, 0);
     }
-    sdl2_2d_redraw(scon);
+    sdl2_redraw(scon);
 }
 
 static void handle_keydown(SDL_Event *ev)
@@ -358,8 +372,10 @@ static void handle_keydown(SDL_Event *ev)
         case SDL_SCANCODE_U:
             sdl2_window_destroy(scon);
             sdl2_window_create(scon);
-            /* re-create texture */
-            sdl2_2d_switch(&scon->dcl, scon->surface);
+            if (!scon->opengl) {
+                /* re-create scon->texture */
+                sdl2_2d_switch(&scon->dcl, scon->surface);
+            }
             gui_keysym = 1;
             break;
 #if 0
@@ -378,7 +394,7 @@ static void handle_keydown(SDL_Event *ev)
                 fprintf(stderr, "%s: scale to %dx%d\n",
                         __func__, width, height);
                 sdl_scale(scon, width, height);
-                sdl2_2d_redraw(scon);
+                sdl2_redraw(scon);
                 gui_keysym = 1;
             }
 #endif
@@ -514,10 +530,10 @@ static void handle_windowevent(SDL_Event *ev)
             info.height = ev->window.data2;
             dpy_set_ui_info(scon->dcl.con, &info);
         }
-        sdl2_2d_redraw(scon);
+        sdl2_redraw(scon);
         break;
     case SDL_WINDOWEVENT_EXPOSED:
-        sdl2_2d_redraw(scon);
+        sdl2_redraw(scon);
         break;
     case SDL_WINDOWEVENT_FOCUS_GAINED:
     case SDL_WINDOWEVENT_ENTER:
@@ -671,6 +687,35 @@ static const DisplayChangeListenerOps dcl_2d_ops = {
     .dpy_cursor_define    = sdl_mouse_define,
 };
 
+#ifdef CONFIG_OPENGL
+static const DisplayChangeListenerOps dcl_gl_ops = {
+    .dpy_name                = "sdl2-gl",
+    .dpy_gfx_update          = sdl2_gl_update,
+    .dpy_gfx_switch          = sdl2_gl_switch,
+    .dpy_gfx_check_format    = console_gl_check_format,
+    .dpy_refresh             = sdl2_gl_refresh,
+    .dpy_mouse_set           = sdl_mouse_warp,
+    .dpy_cursor_define       = sdl_mouse_define,
+};
+#endif
+
+void sdl_display_early_init(int opengl)
+{
+    switch (opengl) {
+    case -1: /* default */
+    case 0:  /* off */
+        break;
+    case 1: /* on */
+#ifdef CONFIG_OPENGL
+        display_opengl = 1;
+#endif
+        break;
+    default:
+        g_assert_not_reached();
+        break;
+    }
+}
+
 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 {
     int flags;
@@ -716,10 +761,16 @@ void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
         if (!qemu_console_is_graphic(con)) {
             sdl2_console[i].hidden = true;
         }
+        sdl2_console[i].idx = i;
+#ifdef CONFIG_OPENGL
+        sdl2_console[i].opengl = display_opengl;
+        sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
+#else
+        sdl2_console[i].opengl = 0;
         sdl2_console[i].dcl.ops = &dcl_2d_ops;
+#endif
         sdl2_console[i].dcl.con = con;
         register_displaychangelistener(&sdl2_console[i].dcl);
-        sdl2_console[i].idx = i;
     }
 
     /* Load a 32x32x4 image. White pixels are transparent. */
diff --git a/vl.c b/vl.c
index 4a5352b..677e4cf 100644
--- a/vl.c
+++ b/vl.c
@@ -130,6 +130,7 @@ static int data_dir_idx;
 const char *bios_name = NULL;
 enum vga_retrace_method vga_retrace_method = VGA_RETRACE_DUMB;
 DisplayType display_type = DT_DEFAULT;
+int request_opengl = -1;
 int display_opengl;
 static int display_remote;
 const char* keyboard_layout = NULL;
@@ -1984,6 +1985,15 @@ static DisplayType select_display(const char *p)
                 } else {
                     goto invalid_sdl_args;
                 }
+            } else if (strstart(opts, ",gl=", &nextopt)) {
+                opts = nextopt;
+                if (strstart(opts, "on", &nextopt)) {
+                    request_opengl = 1;
+                } else if (strstart(opts, "off", &nextopt)) {
+                    request_opengl = 0;
+                } else {
+                    goto invalid_sdl_args;
+                }
             } else {
             invalid_sdl_args:
                 fprintf(stderr, "Invalid SDL option string: %s\n", p);
@@ -3980,6 +3990,19 @@ int main(int argc, char **argv, char **envp)
         early_gtk_display_init();
     }
 #endif
+#if defined(CONFIG_SDL)
+    if (display_type == DT_SDL) {
+        sdl_display_early_init(request_opengl);
+    }
+#endif
+    if (request_opengl == 1 && display_opengl == 0) {
+#if defined(CONFIG_OPENGL)
+        fprintf(stderr, "OpenGL is not supported by the display.\n");
+#else
+        fprintf(stderr, "QEMU was built without opengl support.\n");
+#endif
+        exit(1);
+    }
 
     socket_init();
 
-- 
1.8.3.1

Re: [Qemu-devel] [PATCH 1/4] opengl: some shader infrastructure

[Max Reitz]

On 2015-03-03 at 07:07, Gerd Hoffmann wrote:
> ---
>   Makefile                 | 14 ++++++++++++++
>   scripts/shaderinclude.pl | 16 ++++++++++++++++
>   2 files changed, 30 insertions(+)
>   create mode 100644 scripts/shaderinclude.pl

With your S-o-b added:

Reviewed-by: Max Reitz <mreitz@redhat.com>

Re: [Qemu-devel] [PATCH 2/4] console-gl: add opengl rendering helper functions

[Max Reitz]

On 2015-03-03 at 07:07, Gerd Hoffmann wrote:
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>   Makefile                    |   3 +
>   configure                   |   2 +-
>   include/ui/console.h        |  31 ++++++
>   ui/Makefile.objs            |   5 +
>   ui/console-gl.c             | 253 ++++++++++++++++++++++++++++++++++++++++++++
>   ui/shader/texture-blit.frag |  10 ++
>   ui/shader/texture-blit.vert |  10 ++
>   7 files changed, 313 insertions(+), 1 deletion(-)
>   create mode 100644 ui/console-gl.c
>   create mode 100644 ui/shader/texture-blit.frag
>   create mode 100644 ui/shader/texture-blit.vert

Reviewed-by: Max Reitz <mreitz@redhat.com>

Re: [Qemu-devel] [PATCH 4/4] sdl2: add support for display rendering using opengl.

[Max Reitz]

On 2015-03-03 at 07:07, Gerd Hoffmann wrote:
> Add new sdl2-gl.c file, with display
> rendering functions using opengl.
>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>   include/ui/console.h |   1 +
>   include/ui/sdl2.h    |  11 +++++
>   ui/Makefile.objs     |   3 ++
>   ui/sdl.c             |  10 +++++
>   ui/sdl2-2d.c         |   7 ++++
>   ui/sdl2-gl.c         | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++
>   ui/sdl2.c            |  65 ++++++++++++++++++++++++++----
>   vl.c                 |  23 +++++++++++
>   8 files changed, 225 insertions(+), 7 deletions(-)
>   create mode 100644 ui/sdl2-gl.c

Reviewed-by: Max Reitz <mreitz@redhat.com>