Hi all,
I am attaching a patch that adds opengl support for rendering the guest
framebuffer in the SDL window.
SDL is needed anyway to open the window and handle the events.
Opengl rendering is optional and can be turned off at both compile time
and in the vm configuration file.
Some of the benefits of using opengl are:
-faster rendering, less CPU intensive, especially with good graphic cards;
-makes the window resizing possible and hardware accelerated, thus very
efficient and smooth;
-allows other optimizations like sharing directly a buffer in vram with
the guest (not yet implemented).
Regards,
Stefano Stabellini
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
diff -r f33328217eee tools/examples/xmexample.hvm
--- a/tools/examples/xmexample.hvm Mon Mar 10 22:51:57 2008 +0000
+++ b/tools/examples/xmexample.hvm Mon Mar 17 14:24:06 2008 +0000
@@ -135,6 +135,11 @@ sdl=0
sdl=0
#----------------------------------------------------------------------------
+# enable OpenGL for texture rendering inside the SDL window, default = 1
+# valid only if sdl is enabled.
+opengl=1
+
+#----------------------------------------------------------------------------
# enable VNC library for graphics, default = 1
vnc=1
diff -r f33328217eee tools/ioemu/configure
--- a/tools/ioemu/configure Mon Mar 10 22:51:57 2008 +0000
+++ b/tools/ioemu/configure Mon Mar 17 10:36:59 2008 +0000
@@ -189,6 +189,8 @@ for opt do
--static) static="yes"
;;
--disable-sdl) sdl="no"
+ ;;
+ --disable-opengl) opengl="no"
;;
--enable-coreaudio) coreaudio="yes"
;;
@@ -539,6 +541,26 @@ fi # -z $sdl
fi # -z $sdl
##########################################
+# OpenGL test
+
+if test -z "$opengl" && test "$sdl" = "yes"
+then
+cat > $TMPC << EOF
+#include <GL/gl.h>
+#ifndef GL_TEXTURE_RECTANGLE_ARB
+#error "Opengl doesn't support GL_TEXTURE_RECTANGLE_ARB"
+#endif
+int main( void ) { return (int) glGetString(GL_EXTENSIONS); }
+EOF
+if $cc -o $TMPE $TMPC -lGL 2> /dev/null
+then
+opengl="yes"
+else
+opengl="no"
+fi
+fi
+
+##########################################
# alsa sound support libraries
if test "$alsa" = "yes" ; then
@@ -612,6 +634,7 @@ if test "$sdl" != "no" ; then
if test "$sdl" != "no" ; then
echo "SDL static link $sdl_static"
fi
+echo "OpenGL support $opengl"
echo "mingw32 support $mingw32"
echo "Adlib support $adlib"
echo "CoreAudio support $coreaudio"
@@ -995,6 +1018,15 @@ if test "$target_user_only" = "no"; then
fi
fi
+if test $opengl = "yes"
+then
+ echo "#define CONFIG_OPENGL 1" >> $config_h
+ echo "CONFIG_OPENGL=yes" >> $config_mak
+ echo "SDL_CFLAGS+=-I/usr/include/GL" >> $config_mak
+ echo "SDL_LIBS+=-lXext" >> $config_mak
+ echo "SDL_LIBS+=-lGL" >> $config_mak
+fi
+
if test "$cocoa" = "yes" ; then
echo "#define CONFIG_COCOA 1" >> $config_h
echo "CONFIG_COCOA=yes" >> $config_mak
diff -r f33328217eee tools/ioemu/sdl.c
--- a/tools/ioemu/sdl.c Mon Mar 10 22:51:57 2008 +0000
+++ b/tools/ioemu/sdl.c Mon Mar 17 11:01:19 2008 +0000
@@ -29,6 +29,10 @@
#include <signal.h>
#endif
+#ifdef CONFIG_OPENGL
+#include <SDL_opengl.h>
+#endif
+
static SDL_Surface *screen;
static SDL_Surface *shared = NULL;
static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
@@ -44,6 +48,99 @@ static SDL_Cursor *sdl_cursor_normal;
static SDL_Cursor *sdl_cursor_normal;
static SDL_Cursor *sdl_cursor_hidden;
static int absolute_enabled = 0;
+static int opengl_enabled;
+
+#ifdef CONFIG_OPENGL
+static GLint tex_format;
+static GLint tex_type;
+static GLuint texture_ref = 0;
+static GLint gl_format;
+
+static void opengl_setdata(DisplayState *ds, void *pixels)
+{
+ glEnable(GL_TEXTURE_RECTANGLE_ARB);
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+ glClearColor(0, 0, 0, 0);
+ glDisable(GL_BLEND);
+ glDisable(GL_LIGHTING);
+ glDisable(GL_DEPTH_TEST);
+ glDepthMask(GL_FALSE);
+ glDisable(GL_CULL_FACE);
+ glViewport( 0, 0, screen->w, screen->h);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(0, screen->w, screen->h, 0, -1,1);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glClear(GL_COLOR_BUFFER_BIT);
+ ds->data = pixels;
+
+ if (texture_ref) {
+ glDeleteTextures(1, &texture_ref);
+ texture_ref = 0;
+ }
+
+ glGenTextures(1, &texture_ref);
+ glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texture_ref);
+ glPixelStorei(GL_UNPACK_LSB_FIRST, 1);
+ switch (ds->depth) {
+ case 8:
+ tex_format = GL_RGB;
+ tex_type = GL_UNSIGNED_BYTE_3_3_2;
+ glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
+ break;
+ case 16:
+ tex_format = GL_RGB;
+ tex_type = GL_UNSIGNED_SHORT_5_6_5;
+ glPixelStorei (GL_UNPACK_ALIGNMENT, 2);
+ break;
+ case 24:
+ tex_format = GL_BGR;
+ tex_type = GL_UNSIGNED_BYTE;
+ glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
+ break;
+ case 32:
+ if (!ds->bgr) {
+ tex_format = GL_BGRA;
+ tex_type = GL_UNSIGNED_BYTE;
+ } else {
+ tex_format = GL_RGBA;
+ tex_type = GL_UNSIGNED_BYTE;
+ }
+ glPixelStorei (GL_UNPACK_ALIGNMENT, 4);
+ break;
+ }
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, (ds->linesize * 8 / ds->depth) -
ds->width);
+ glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, gl_format, ds->width,
ds->height, 0, tex_format, tex_type, pixels);
+ glTexParameterf(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_PRIORITY, 1.0);
+ glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
+ glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
+}
+
+static void opengl_update(DisplayState *ds, int x, int y, int w, int h)
+{
+ int bpp = ds->depth / 8;
+ GLvoid *pixels = ds->data + y * ds->linesize + x * bpp;
+ glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texture_ref);
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, (ds->linesize / bpp) - w);
+ glTexSubImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, x, y, w, h, tex_format,
tex_type, pixels);
+ glBegin(GL_QUADS);
+ glTexCoord2d(0, 0);
+ glVertex2d(0, 0);
+ glTexCoord2d(ds->width, 0);
+ glVertex2d(screen->w, 0);
+ glTexCoord2d(ds->width, ds->height);
+ glVertex2d(screen->w, screen->h);
+ glTexCoord2d(0, ds->height);
+ glVertex2d(0, screen->h);
+ glEnd();
+ glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
+ SDL_GL_SwapBuffers();
+}
+#endif
static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
{
@@ -96,17 +193,26 @@ static void sdl_resize(DisplayState *ds,
// printf("resizing to %d %d\n", w, h);
- flags =
SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL|SDL_DOUBLEBUF|SDL_HWPALETTE;
- if (gui_fullscreen)
+#ifdef CONFIG_OPENGL
+ if (ds->shared_buf && opengl_enabled)
+ flags = SDL_OPENGL|SDL_RESIZABLE;
+ else
+#endif
+ flags =
SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL|SDL_DOUBLEBUF|SDL_HWPALETTE;
+
+ if (gui_fullscreen) {
flags |= SDL_FULLSCREEN;
-
+ flags &= ~SDL_RESIZABLE;
+ }
+
width = w;
height = h;
again:
screen = SDL_SetVideoMode(w, h, 0, flags);
+#ifndef CONFIG_OPENGL
if (!screen) {
- fprintf(stderr, "Could not open SDL display\n");
+ fprintf(stderr, "Could not open SDL display: %s\n", SDL_GetError());
exit(1);
}
if (!screen->pixels && (flags & SDL_HWSURFACE) && (flags &
SDL_FULLSCREEN)) {
@@ -115,9 +221,10 @@ static void sdl_resize(DisplayState *ds,
}
if (!screen->pixels) {
- fprintf(stderr, "Could not open SDL display\n");
+ fprintf(stderr, "Could not open SDL display: %s\n", SDL_GetError());
exit(1);
}
+#endif
ds->width = w;
ds->height = h;
if (!ds->shared_buf) {
@@ -131,6 +238,25 @@ static void sdl_resize(DisplayState *ds,
ds->linesize = screen->pitch;
} else {
ds->linesize = linesize;
+#ifdef CONFIG_OPENGL
+ switch(screen->format->BitsPerPixel) {
+ case 8:
+ gl_format = GL_RGB8;
+ break;
+ case 16:
+ gl_format = GL_RGB16;
+ break;
+ case 24:
+ gl_format = GL_RGB;
+ break;
+ case 32:
+ if (!screen->format->Rshift)
+ gl_format = GL_BGRA;
+ else
+ gl_format = GL_RGBA;
+ break;
+ };
+#endif
}
}
@@ -139,7 +265,13 @@ static void sdl_colourdepth(DisplayState
if (!depth || !ds->depth) return;
ds->shared_buf = 1;
ds->depth = depth;
- ds->linesize = width * depth / 8;
+ ds->linesize = width * depth / 8;
+#ifdef CONFIG_OPENGL
+ if (opengl_enabled) {
+ ds->dpy_update = opengl_update;
+ ds->dpy_setdata = opengl_setdata;
+ }
+#endif
}
/* generic keyboard conversion */
@@ -331,8 +463,8 @@ static void sdl_send_mouse_event(int dx,
}
SDL_GetMouseState(&dx, &dy);
- dx = dx * 0x7FFF / (width - 1);
- dy = dy * 0x7FFF / (height - 1);
+ dx = dx * 0x7FFF / (screen->w - 1);
+ dy = dy * 0x7FFF / (screen->h - 1);
} else if (absolute_enabled) {
sdl_show_cursor();
absolute_enabled = 0;
@@ -371,7 +503,7 @@ static void sdl_refresh(DisplayState *ds
while (SDL_PollEvent(ev)) {
switch (ev->type) {
case SDL_VIDEOEXPOSE:
- sdl_update(ds, 0, 0, screen->w, screen->h);
+ sdl_update(ds, 0, 0, ds->width, ds->height);
break;
case SDL_KEYDOWN:
case SDL_KEYUP:
@@ -528,6 +660,16 @@ static void sdl_refresh(DisplayState *ds
}
}
break;
+#ifdef CONFIG_OPENGL
+ case SDL_VIDEORESIZE:
+ {
+ SDL_ResizeEvent *rev = &ev->resize;
+ screen = SDL_SetVideoMode(rev->w, rev->h, 0,
SDL_OPENGL|SDL_RESIZABLE);
+ opengl_setdata(ds, ds->data);
+ opengl_update(ds, 0, 0, ds->width, ds->height);
+ break;
+ }
+#endif
default:
break;
}
@@ -536,13 +678,17 @@ static void sdl_refresh(DisplayState *ds
static void sdl_cleanup(void)
{
+#ifdef CONFIG_OPENGL
+ if (texture_ref) glDeleteTextures(1, &texture_ref);
+#endif
SDL_Quit();
}
-void sdl_display_init(DisplayState *ds, int full_screen)
+void sdl_display_init(DisplayState *ds, int full_screen, int opengl)
{
int flags;
uint8_t data = 0;
+ opengl_enabled = opengl;
#if defined(__APPLE__)
/* always use generic keymaps */
diff -r f33328217eee tools/ioemu/vl.c
--- a/tools/ioemu/vl.c Mon Mar 10 22:51:57 2008 +0000
+++ b/tools/ioemu/vl.c Mon Mar 17 14:15:31 2008 +0000
@@ -174,6 +174,11 @@ int graphic_height = 600;
#endif
int graphic_depth = 15;
int full_screen = 0;
+#ifdef CONFIG_OPENGL
+int opengl_enabled = 1;
+#else
+int opengl_enabled = 0;
+#endif
int no_quit = 0;
CharDriverState *serial_hds[MAX_SERIAL_PORTS];
CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
@@ -6482,6 +6487,9 @@ void help(void)
#ifdef CONFIG_SDL
"-no-quit disable SDL window close capability\n"
#endif
+#ifdef CONFIG_OPENGL
+ "-disable-opengl disable OpenGL rendering, using SDL"
+#endif
#ifdef TARGET_I386
"-no-fd-bootchk disable boot signature checking for floppy disks\n"
#endif
@@ -6660,6 +6668,7 @@ enum {
QEMU_OPTION_loadvm,
QEMU_OPTION_full_screen,
QEMU_OPTION_no_quit,
+ QEMU_OPTION_disable_opengl,
QEMU_OPTION_pidfile,
QEMU_OPTION_no_kqemu,
QEMU_OPTION_kernel_kqemu,
@@ -6757,6 +6766,7 @@ const QEMUOption qemu_options[] = {
#ifdef CONFIG_SDL
{ "no-quit", 0, QEMU_OPTION_no_quit },
#endif
+ { "disable-opengl", 0, QEMU_OPTION_disable_opengl },
{ "pidfile", HAS_ARG, QEMU_OPTION_pidfile },
{ "win2k-hack", 0, QEMU_OPTION_win2k_hack },
{ "usbdevice", HAS_ARG, QEMU_OPTION_usbdevice },
@@ -7528,6 +7538,9 @@ int main(int argc, char **argv)
no_quit = 1;
break;
#endif
+ case QEMU_OPTION_disable_opengl:
+ opengl_enabled = 0;
+ break;
case QEMU_OPTION_pidfile:
create_pidfile(optarg);
break;
@@ -7854,7 +7867,7 @@ int main(int argc, char **argv)
xenstore_write_vncport(vnc_display_port);
} else {
#if defined(CONFIG_SDL)
- sdl_display_init(ds, full_screen);
+ sdl_display_init(ds, full_screen, opengl_enabled);
#elif defined(CONFIG_COCOA)
cocoa_display_init(ds, full_screen);
#else
diff -r f33328217eee tools/ioemu/vl.h
--- a/tools/ioemu/vl.h Mon Mar 10 22:51:57 2008 +0000
+++ b/tools/ioemu/vl.h Mon Mar 17 10:43:09 2008 +0000
@@ -982,7 +982,7 @@ void isa_cirrus_vga_init(DisplayState *d
unsigned long vga_ram_offset, int vga_ram_size);
/* sdl.c */
-void sdl_display_init(DisplayState *ds, int full_screen);
+void sdl_display_init(DisplayState *ds, int full_screen, int opengl_enable);
/* cocoa.m */
void cocoa_display_init(DisplayState *ds, int full_screen);
diff -r f33328217eee tools/python/xen/xend/XendConfig.py
--- a/tools/python/xen/xend/XendConfig.py Mon Mar 10 22:51:57 2008 +0000
+++ b/tools/python/xen/xend/XendConfig.py Mon Mar 17 12:54:31 2008 +0000
@@ -126,7 +126,7 @@ LEGACY_CFG_TO_XENAPI_CFG = reverse_dict(
# Platform configuration keys.
XENAPI_PLATFORM_CFG = [ 'acpi', 'apic', 'boot', 'device_model', 'loader',
'display',
'fda', 'fdb', 'keymap', 'isa', 'localtime', 'monitor',
- 'nographic', 'pae', 'rtc_timeoffset', 'serial', 'sdl',
+ 'nographic', 'pae', 'rtc_timeoffset', 'serial', 'sdl',
'opengl',
'soundhw','stdvga', 'usb', 'usbdevice', 'hpet', 'vnc',
'vncconsole', 'vncdisplay', 'vnclisten', 'timer_mode',
'vncpasswd', 'vncunused', 'xauthority', 'pci', 'vhpt',
diff -r f33328217eee tools/python/xen/xend/image.py
--- a/tools/python/xen/xend/image.py Mon Mar 10 22:51:57 2008 +0000
+++ b/tools/python/xen/xend/image.py Mon Mar 17 11:41:04 2008 +0000
@@ -262,7 +262,8 @@ class ImageHandler:
elif has_sdl:
# SDL is default in QEMU.
- pass
+ if int(vmConfig['platform'].get('opengl', 1)) != 1 :
+ ret.append('-disable-opengl')
else:
ret.append('-nographic')
diff -r f33328217eee tools/python/xen/xm/create.py
--- a/tools/python/xen/xm/create.py Mon Mar 10 22:51:57 2008 +0000
+++ b/tools/python/xen/xm/create.py Mon Mar 17 11:33:32 2008 +0000
@@ -503,6 +503,10 @@ gopts.var('sdl', val='',
gopts.var('sdl', val='',
fn=set_value, default=None,
use="""Should the device model use SDL?""")
+
+gopts.var('opengl', val='',
+ fn=set_value, default=None,
+ use="""Enable\Disable OpenGL""")
gopts.var('display', val='DISPLAY',
fn=set_value, default=None,
@@ -745,7 +749,7 @@ def configure_hvm(config_image, vals):
'vnc', 'vncdisplay', 'vncunused', 'vncconsole', 'vnclisten',
'sdl', 'display', 'xauthority', 'rtc_timeoffset', 'monitor',
'acpi', 'apic', 'usb', 'usbdevice', 'keymap', 'pci', 'hpet',
- 'guest_os_type', 'hap']
+ 'guest_os_type', 'hap', 'opengl']
for a in args:
if a in vals.__dict__ and vals.__dict__[a] is not None:
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