static void
clutter_glx_texture_pixmap_init (ClutterGLXTexturePixmap *self)
{
ClutterGLXTexturePixmapPrivate *priv;
priv = self->priv =
G_TYPE_INSTANCE_GET_PRIVATE (self,
CLUTTER_GLX_TYPE_TEXTURE_PIXMAP,
ClutterGLXTexturePixmapPrivate);
if (_ext_check_done == FALSE)
{
const gchar *glx_extensions = NULL;
glx_extensions =
glXQueryExtensionsString (clutter_x11_get_default_display (),
clutter_x11_get_default_screen ());
/* Check for the texture from pixmap extension */
if (cogl_check_extension ("GLX_EXT_texture_from_pixmap", glx_extensions))
{
_gl_bind_tex_image =
(BindTexImage)cogl_get_proc_address ("glXBindTexImageEXT");
_gl_release_tex_image =
(ReleaseTexImage)cogl_get_proc_address ("glXReleaseTexImageEXT");
if (_gl_bind_tex_image && _gl_release_tex_image)
_have_tex_from_pixmap_ext = TRUE;
}
_ext_check_done = TRUE;
}
}
static gboolean
load_gl_symbol (const char *name,
void **func)
{
*func = cogl_get_proc_address (name);
if (!*func)
{
meta_verbose ("MetaSyncRing: failed to resolve required GL symbol \"%s\"\n", name);
return FALSE;
}
return TRUE;
}
void
test_conform_get_gl_functions (TestConformGLFunctions *functions)
{
functions->glGetString = (void *) cogl_get_proc_address ("glGetString");
g_assert (functions->glGetString != NULL);
functions->glGetIntegerv = (void *) cogl_get_proc_address ("glGetIntegerv");
g_assert (functions->glGetIntegerv != NULL);
functions->glPixelStorei = (void *) cogl_get_proc_address ("glPixelStorei");
g_assert (functions->glPixelStorei != NULL);
functions->glBindTexture = (void *) cogl_get_proc_address ("glBindTexture");
g_assert (functions->glBindTexture != NULL);
functions->glGenTextures = (void *) cogl_get_proc_address ("glGenTextures");
g_assert (functions->glGenTextures != NULL);
functions->glGetError = (void *) cogl_get_proc_address ("glGetError");
g_assert (functions->glGetError != NULL);
functions->glDeleteTextures =
(void *) cogl_get_proc_address ("glDeleteTextures");
g_assert (functions->glDeleteTextures != NULL);
functions->glTexImage2D = (void *) cogl_get_proc_address ("glTexImage2D");
g_assert (functions->glTexImage2D != NULL);
functions->glTexParameteri =
(void *) cogl_get_proc_address ("glTexParameteri");
g_assert (functions->glTexParameteri != NULL);
}
static ClutterFeatureFlags
clutter_backend_glx_get_features (ClutterBackend *backend)
{
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
const gchar *glx_extensions = NULL;
const gchar *gl_extensions = NULL;
ClutterFeatureFlags flags;
gboolean use_dri = FALSE;
flags = clutter_backend_x11_get_features (backend);
flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
/* this will make sure that the GL context exists */
g_assert (backend_glx->gl_context != None);
g_assert (glXGetCurrentDrawable () != None);
CLUTTER_NOTE (BACKEND,
"Checking features\n"
" GL_VENDOR: %s\n"
" GL_RENDERER: %s\n"
" GL_VERSION: %s\n"
" GL_EXTENSIONS: %s",
glGetString (GL_VENDOR),
glGetString (GL_RENDERER),
glGetString (GL_VERSION),
glGetString (GL_EXTENSIONS));
glx_extensions =
glXQueryExtensionsString (clutter_x11_get_default_display (),
clutter_x11_get_default_screen ());
CLUTTER_NOTE (BACKEND, " GLX Extensions: %s", glx_extensions);
gl_extensions = (const gchar *)glGetString (GL_EXTENSIONS);
/* When using glBlitFramebuffer or glXCopySubBufferMESA for sub stage
* redraws, we cannot rely on glXSwapIntervalSGI to throttle the blits
* so we need to resort to manually synchronizing with the vblank so we
* always check for the video_sync extension...
*/
if (_cogl_check_extension ("GLX_SGI_video_sync", glx_extensions) &&
/* Note: the GLX_SGI_video_sync spec explicitly states this extension
* only works for direct contexts. */
glXIsDirect (clutter_x11_get_default_display (),
backend_glx->gl_context))
{
backend_glx->get_video_sync =
(GetVideoSyncProc) cogl_get_proc_address ("glXGetVideoSyncSGI");
backend_glx->wait_video_sync =
(WaitVideoSyncProc) cogl_get_proc_address ("glXWaitVideoSyncSGI");
}
use_dri = check_vblank_env ("dri");
/* First check for explicit disabling or it set elsewhere (eg NVIDIA) */
if (check_vblank_env ("none"))
{
CLUTTER_NOTE (BACKEND, "vblank sync: disabled at user request");
goto vblank_setup_done;
}
if (g_getenv ("__GL_SYNC_TO_VBLANK") != NULL)
{
backend_glx->vblank_type = CLUTTER_VBLANK_GLX_SWAP;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
CLUTTER_NOTE (BACKEND, "Using __GL_SYNC_TO_VBLANK hint");
goto vblank_setup_done;
}
/* We try two GL vblank syncing mechanisms.
* glXSwapIntervalSGI is tried first, then glXGetVideoSyncSGI.
*
* glXSwapIntervalSGI is known to work with Mesa and in particular
* the Intel drivers. glXGetVideoSyncSGI has serious problems with
* Intel drivers causing terrible frame rate so it only tried as a
* fallback.
*
* How well glXGetVideoSyncSGI works with other driver (ATI etc) needs
* to be investigated. glXGetVideoSyncSGI on ATI at least seems to have
* no effect.
*/
if (!use_dri &&
_cogl_check_extension ("GLX_SGI_swap_control", glx_extensions))
{
backend_glx->swap_interval =
(SwapIntervalProc) cogl_get_proc_address ("glXSwapIntervalSGI");
CLUTTER_NOTE (BACKEND, "attempting glXSwapIntervalSGI vblank setup");
if (backend_glx->swap_interval != NULL &&
backend_glx->swap_interval (1) == 0)
{
backend_glx->vblank_type = CLUTTER_VBLANK_GLX_SWAP;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI setup success");
#ifdef GLX_INTEL_swap_event
/* GLX_INTEL_swap_event allows us to avoid blocking the CPU
* while we wait for glXSwapBuffers to complete, and instead
* we get an X event notifying us of completion...
*/
if (!(clutter_paint_debug_flags & CLUTTER_DEBUG_DISABLE_SWAP_EVENTS) &&
_cogl_check_extension ("GLX_INTEL_swap_event", glx_extensions))
{
flags |= CLUTTER_FEATURE_SWAP_EVENTS;
}
#endif /* GLX_INTEL_swap_event */
goto vblank_setup_done;
}
CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI vblank setup failed");
}
if (!use_dri &&
!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK) &&
_cogl_check_extension ("GLX_SGI_video_sync", glx_extensions))
{
CLUTTER_NOTE (BACKEND, "attempting glXGetVideoSyncSGI vblank setup");
if ((backend_glx->get_video_sync != NULL) &&
(backend_glx->wait_video_sync != NULL))
{
CLUTTER_NOTE (BACKEND, "glXGetVideoSyncSGI vblank setup success");
backend_glx->vblank_type = CLUTTER_VBLANK_GLX;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
goto vblank_setup_done;
}
CLUTTER_NOTE (BACKEND, "glXGetVideoSyncSGI vblank setup failed");
}
#ifdef __linux__
/*
* DRI is really an extreme fallback -rumoured to work with Via chipsets
*/
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
{
CLUTTER_NOTE (BACKEND, "attempting DRI vblank setup");
backend_glx->dri_fd = open("/dev/dri/card0", O_RDWR);
if (backend_glx->dri_fd >= 0)
{
CLUTTER_NOTE (BACKEND, "DRI vblank setup success");
backend_glx->vblank_type = CLUTTER_VBLANK_DRI;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
goto vblank_setup_done;
}
CLUTTER_NOTE (BACKEND, "DRI vblank setup failed");
}
#endif /* __linux__ */
CLUTTER_NOTE (BACKEND, "no use-able vblank mechanism found");
vblank_setup_done:
if (_cogl_check_extension ("GLX_MESA_copy_sub_buffer", glx_extensions))
{
backend_glx->copy_sub_buffer =
(CopySubBufferProc) cogl_get_proc_address ("glXCopySubBufferMESA");
backend_glx->can_blit_sub_buffer = TRUE;
backend_glx->blit_sub_buffer_is_synchronized = TRUE;
}
else if (_cogl_check_extension ("GL_EXT_framebuffer_blit", gl_extensions))
{
CLUTTER_NOTE (BACKEND,
"Using glBlitFramebuffer fallback for sub_buffer copies");
backend_glx->blit_framebuffer =
(BlitFramebufferProc) cogl_get_proc_address ("glBlitFramebuffer");
backend_glx->can_blit_sub_buffer = TRUE;
backend_glx->blit_sub_buffer_is_synchronized = FALSE;
}
CLUTTER_NOTE (BACKEND, "backend features checked");
return flags;
}
void
_cogl_features_init (void)
{
CoglFeatureFlags flags = 0;
const gchar *gl_extensions;
GLint max_clip_planes = 0;
GLint num_stencil_bits = 0;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
flags = COGL_FEATURE_TEXTURE_READ_PIXELS;
gl_extensions = (const gchar*) glGetString (GL_EXTENSIONS);
if (cogl_check_extension ("GL_ARB_texture_non_power_of_two", gl_extensions))
{
#ifdef HAVE_CLUTTER_OSX
if (really_enable_npot ())
#endif
flags |= COGL_FEATURE_TEXTURE_NPOT;
}
#ifdef GL_YCBCR_MESA
if (cogl_check_extension ("GL_MESA_ycbcr_texture", gl_extensions))
{
flags |= COGL_FEATURE_TEXTURE_YUV;
}
#endif
if (cogl_check_extension ("GL_ARB_shader_objects", gl_extensions) &&
cogl_check_extension ("GL_ARB_vertex_shader", gl_extensions) &&
cogl_check_extension ("GL_ARB_fragment_shader", gl_extensions))
{
ctx->pf_glCreateProgramObjectARB =
(COGL_PFNGLCREATEPROGRAMOBJECTARBPROC)
cogl_get_proc_address ("glCreateProgramObjectARB");
ctx->pf_glCreateShaderObjectARB =
(COGL_PFNGLCREATESHADEROBJECTARBPROC)
cogl_get_proc_address ("glCreateShaderObjectARB");
ctx->pf_glShaderSourceARB =
(COGL_PFNGLSHADERSOURCEARBPROC)
cogl_get_proc_address ("glShaderSourceARB");
ctx->pf_glCompileShaderARB =
(COGL_PFNGLCOMPILESHADERARBPROC)
cogl_get_proc_address ("glCompileShaderARB");
ctx->pf_glAttachObjectARB =
(COGL_PFNGLATTACHOBJECTARBPROC)
cogl_get_proc_address ("glAttachObjectARB");
ctx->pf_glLinkProgramARB =
(COGL_PFNGLLINKPROGRAMARBPROC)
cogl_get_proc_address ("glLinkProgramARB");
ctx->pf_glUseProgramObjectARB =
(COGL_PFNGLUSEPROGRAMOBJECTARBPROC)
cogl_get_proc_address ("glUseProgramObjectARB");
ctx->pf_glGetUniformLocationARB =
(COGL_PFNGLGETUNIFORMLOCATIONARBPROC)
cogl_get_proc_address ("glGetUniformLocationARB");
ctx->pf_glDeleteObjectARB =
(COGL_PFNGLDELETEOBJECTARBPROC)
cogl_get_proc_address ("glDeleteObjectARB");
ctx->pf_glGetInfoLogARB =
(COGL_PFNGLGETINFOLOGARBPROC)
cogl_get_proc_address ("glGetInfoLogARB");
ctx->pf_glGetObjectParameterivARB =
(COGL_PFNGLGETOBJECTPARAMETERIVARBPROC)
cogl_get_proc_address ("glGetObjectParameterivARB");
ctx->pf_glUniform1fARB =
(COGL_PFNGLUNIFORM1FARBPROC)
cogl_get_proc_address ("glUniform1fARB");
ctx->pf_glVertexAttribPointerARB =
(COGL_PFNGLVERTEXATTRIBPOINTERARBPROC)
cogl_get_proc_address ("glVertexAttribPointerARB");
ctx->pf_glEnableVertexAttribArrayARB =
(COGL_PFNGLENABLEVERTEXATTRIBARRAYARBPROC)
cogl_get_proc_address ("glEnableVertexAttribArrayARB");
ctx->pf_glDisableVertexAttribArrayARB =
(COGL_PFNGLDISABLEVERTEXATTRIBARRAYARBPROC)
cogl_get_proc_address ("glDisableVertexAttribArrayARB");
ctx->pf_glUniform2fARB =
(COGL_PFNGLUNIFORM2FARBPROC)
cogl_get_proc_address ("glUniform2fARB");
ctx->pf_glUniform3fARB =
(COGL_PFNGLUNIFORM3FARBPROC)
cogl_get_proc_address ("glUniform3fARB");
ctx->pf_glUniform4fARB =
(COGL_PFNGLUNIFORM4FARBPROC)
cogl_get_proc_address ("glUniform4fARB");
ctx->pf_glUniform1fvARB =
(COGL_PFNGLUNIFORM1FVARBPROC)
cogl_get_proc_address ("glUniform1fvARB");
ctx->pf_glUniform2fvARB =
(COGL_PFNGLUNIFORM2FVARBPROC)
cogl_get_proc_address ("glUniform2fvARB");
ctx->pf_glUniform3fvARB =
(COGL_PFNGLUNIFORM3FVARBPROC)
cogl_get_proc_address ("glUniform3fvARB");
ctx->pf_glUniform4fvARB =
(COGL_PFNGLUNIFORM4FVARBPROC)
cogl_get_proc_address ("glUniform4fvARB");
ctx->pf_glUniform1iARB =
(COGL_PFNGLUNIFORM1IARBPROC)
cogl_get_proc_address ("glUniform1iARB");
ctx->pf_glUniform2iARB =
(COGL_PFNGLUNIFORM2IARBPROC)
cogl_get_proc_address ("glUniform2iARB");
ctx->pf_glUniform3iARB =
(COGL_PFNGLUNIFORM3IARBPROC)
cogl_get_proc_address ("glUniform3iARB");
ctx->pf_glUniform4iARB =
(COGL_PFNGLUNIFORM4IARBPROC)
cogl_get_proc_address ("glUniform4iARB");
ctx->pf_glUniform1ivARB =
(COGL_PFNGLUNIFORM1IVARBPROC)
cogl_get_proc_address ("glUniform1ivARB");
ctx->pf_glUniform2ivARB =
(COGL_PFNGLUNIFORM2IVARBPROC)
cogl_get_proc_address ("glUniform2ivARB");
ctx->pf_glUniform3ivARB =
(COGL_PFNGLUNIFORM3IVARBPROC)
cogl_get_proc_address ("glUniform3ivARB");
ctx->pf_glUniform4ivARB =
(COGL_PFNGLUNIFORM4IVARBPROC)
cogl_get_proc_address ("glUniform4ivARB");
ctx->pf_glUniformMatrix2fvARB =
(COGL_PFNGLUNIFORMMATRIX2FVARBPROC)
cogl_get_proc_address ("glUniformMatrix2fvARB");
ctx->pf_glUniformMatrix3fvARB =
(COGL_PFNGLUNIFORMMATRIX3FVARBPROC)
cogl_get_proc_address ("glUniformMatrix3fvARB");
ctx->pf_glUniformMatrix4fvARB =
(COGL_PFNGLUNIFORMMATRIX4FVARBPROC)
cogl_get_proc_address ("glUniformMatrix4fvARB");
if (ctx->pf_glCreateProgramObjectARB &&
ctx->pf_glCreateShaderObjectARB &&
ctx->pf_glShaderSourceARB &&
ctx->pf_glCompileShaderARB &&
ctx->pf_glAttachObjectARB &&
ctx->pf_glLinkProgramARB &&
ctx->pf_glUseProgramObjectARB &&
ctx->pf_glGetUniformLocationARB &&
ctx->pf_glDeleteObjectARB &&
ctx->pf_glGetInfoLogARB &&
ctx->pf_glGetObjectParameterivARB &&
ctx->pf_glUniform1fARB &&
ctx->pf_glUniform2fARB &&
ctx->pf_glUniform3fARB &&
ctx->pf_glUniform4fARB &&
ctx->pf_glUniform1fvARB &&
ctx->pf_glUniform2fvARB &&
ctx->pf_glUniform3fvARB &&
ctx->pf_glUniform4fvARB &&
ctx->pf_glUniform1iARB &&
ctx->pf_glUniform2iARB &&
ctx->pf_glUniform3iARB &&
ctx->pf_glUniform4iARB &&
ctx->pf_glUniform1ivARB &&
ctx->pf_glUniform2ivARB &&
ctx->pf_glUniform3ivARB &&
ctx->pf_glUniform4ivARB &&
ctx->pf_glUniformMatrix2fvARB &&
ctx->pf_glUniformMatrix3fvARB &&
ctx->pf_glUniformMatrix4fvARB &&
ctx->pf_glVertexAttribPointerARB &&
ctx->pf_glEnableVertexAttribArrayARB &&
ctx->pf_glDisableVertexAttribArrayARB)
flags |= COGL_FEATURE_SHADERS_GLSL;
}
if (cogl_check_extension ("GL_EXT_framebuffer_object", gl_extensions) ||
cogl_check_extension ("GL_ARB_framebuffer_object", gl_extensions))
{
ctx->pf_glGenRenderbuffersEXT =
(COGL_PFNGLGENRENDERBUFFERSEXTPROC)
cogl_get_proc_address ("glGenRenderbuffersEXT");
ctx->pf_glDeleteRenderbuffersEXT =
(COGL_PFNGLDELETERENDERBUFFERSEXTPROC)
cogl_get_proc_address ("glDeleteRenderbuffersEXT");
ctx->pf_glBindRenderbufferEXT =
(COGL_PFNGLBINDRENDERBUFFEREXTPROC)
cogl_get_proc_address ("glBindRenderbufferEXT");
ctx->pf_glRenderbufferStorageEXT =
(COGL_PFNGLRENDERBUFFERSTORAGEEXTPROC)
cogl_get_proc_address ("glRenderbufferStorageEXT");
ctx->pf_glGenFramebuffersEXT =
(COGL_PFNGLGENFRAMEBUFFERSEXTPROC)
cogl_get_proc_address ("glGenFramebuffersEXT");
ctx->pf_glBindFramebufferEXT =
(COGL_PFNGLBINDFRAMEBUFFEREXTPROC)
cogl_get_proc_address ("glBindFramebufferEXT");
ctx->pf_glFramebufferTexture2DEXT =
(COGL_PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)
cogl_get_proc_address ("glFramebufferTexture2DEXT");
ctx->pf_glFramebufferRenderbufferEXT =
(COGL_PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)
cogl_get_proc_address ("glFramebufferRenderbufferEXT");
ctx->pf_glCheckFramebufferStatusEXT =
(COGL_PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)
cogl_get_proc_address ("glCheckFramebufferStatusEXT");
ctx->pf_glDeleteFramebuffersEXT =
(COGL_PFNGLDELETEFRAMEBUFFERSEXTPROC)
cogl_get_proc_address ("glDeleteFramebuffersEXT");
ctx->pf_glGenerateMipmapEXT =
(COGL_PFNGLGENERATEMIPMAPEXTPROC)
cogl_get_proc_address ("glGenerateMipmapEXT");
if (ctx->pf_glGenRenderbuffersEXT &&
ctx->pf_glBindRenderbufferEXT &&
ctx->pf_glRenderbufferStorageEXT &&
ctx->pf_glGenFramebuffersEXT &&
ctx->pf_glBindFramebufferEXT &&
ctx->pf_glFramebufferTexture2DEXT &&
ctx->pf_glFramebufferRenderbufferEXT &&
ctx->pf_glCheckFramebufferStatusEXT &&
ctx->pf_glDeleteFramebuffersEXT &&
ctx->pf_glGenerateMipmapEXT)
flags |= COGL_FEATURE_OFFSCREEN;
}
if (cogl_check_extension ("GL_EXT_framebuffer_blit", gl_extensions))
{
ctx->pf_glBlitFramebufferEXT =
(COGL_PFNGLBLITFRAMEBUFFEREXTPROC)
cogl_get_proc_address ("glBlitFramebufferEXT");
if (ctx->pf_glBlitFramebufferEXT)
flags |= COGL_FEATURE_OFFSCREEN_BLIT;
}
if (cogl_check_extension ("GL_EXT_framebuffer_multisample", gl_extensions))
{
ctx->pf_glRenderbufferStorageMultisampleEXT =
(COGL_PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC)
cogl_get_proc_address ("glRenderbufferStorageMultisampleEXT");
if (ctx->pf_glRenderbufferStorageMultisampleEXT)
flags |= COGL_FEATURE_OFFSCREEN_MULTISAMPLE;
}
GE( glGetIntegerv (GL_STENCIL_BITS, &num_stencil_bits) );
/* We need at least three stencil bits to combine clips */
if (num_stencil_bits > 2)
flags |= COGL_FEATURE_STENCIL_BUFFER;
GE( glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
if (max_clip_planes >= 4)
flags |= COGL_FEATURE_FOUR_CLIP_PLANES;
if (cogl_check_extension ("GL_ARB_vertex_buffer_object", gl_extensions))
{
ctx->pf_glGenBuffersARB =
(COGL_PFNGLGENBUFFERSARBPROC)
cogl_get_proc_address ("glGenBuffersARB");
ctx->pf_glBindBufferARB =
(COGL_PFNGLBINDBUFFERARBPROC)
cogl_get_proc_address ("glBindBufferARB");
ctx->pf_glBufferDataARB =
(COGL_PFNGLBUFFERDATAARBPROC)
cogl_get_proc_address ("glBufferDataARB");
ctx->pf_glBufferSubDataARB =
(COGL_PFNGLBUFFERSUBDATAARBPROC)
cogl_get_proc_address ("glBufferSubDataARB");
ctx->pf_glDeleteBuffersARB =
(COGL_PFNGLDELETEBUFFERSARBPROC)
cogl_get_proc_address ("glDeleteBuffersARB");
ctx->pf_glMapBufferARB =
(COGL_PFNGLMAPBUFFERARBPROC)
cogl_get_proc_address ("glMapBufferARB");
ctx->pf_glUnmapBufferARB =
(COGL_PFNGLUNMAPBUFFERARBPROC)
cogl_get_proc_address ("glUnmapBufferARB");
if (ctx->pf_glGenBuffersARB
&& ctx->pf_glBindBufferARB
&& ctx->pf_glBufferDataARB
&& ctx->pf_glBufferSubDataARB
&& ctx->pf_glDeleteBuffersARB
&& ctx->pf_glMapBufferARB
&& ctx->pf_glUnmapBufferARB)
flags |= COGL_FEATURE_VBOS;
}
/* These should always be available because they are defined in GL
1.2, but we can't call it directly because under Windows
functions > 1.1 aren't exported */
ctx->pf_glDrawRangeElements =
(COGL_PFNGLDRAWRANGEELEMENTSPROC)
cogl_get_proc_address ("glDrawRangeElements");
ctx->pf_glActiveTexture =
(COGL_PFNGLACTIVETEXTUREPROC)
cogl_get_proc_address ("glActiveTexture");
ctx->pf_glClientActiveTexture =
(COGL_PFNGLCLIENTACTIVETEXTUREPROC)
cogl_get_proc_address ("glClientActiveTexture");
ctx->pf_glBlendEquation =
(COGL_PFNGLBLENDEQUATIONPROC)
cogl_get_proc_address ("glBlendEquation");
ctx->pf_glBlendColor =
(COGL_PFNGLBLENDCOLORPROC)
cogl_get_proc_address ("glBlendColor");
/* Available in 1.4 */
ctx->pf_glBlendFuncSeparate =
(COGL_PFNGLBLENDFUNCSEPARATEPROC)
cogl_get_proc_address ("glBlendFuncSeparate");
/* Available in 2.0 */
ctx->pf_glBlendEquationSeparate =
(COGL_PFNGLBLENDEQUATIONSEPARATEPROC)
cogl_get_proc_address ("glBlendEquationSeparate");
/* Cache features */
ctx->feature_flags = flags;
ctx->features_cached = TRUE;
}
static GSList *
clutter_gst_build_renderers_list (ClutterGstSymbols *syms)
{
GSList *list = NULL;
const gchar *gl_extensions;
GLint nb_texture_units = 0;
gint features = 0, i;
/* The order of the list of renderers is important. They will be prepended
* to a GSList and we'll iterate over that list to choose the first matching
* renderer. Thus if you want to use the fp renderer over the glsl one, the
* fp renderer has to be put after the glsl one in this array */
ClutterGstRenderer *renderers[] =
{
&rgb24_renderer,
&rgb32_renderer,
&yv12_glsl_renderer,
&i420_glsl_renderer,
#ifdef CLUTTER_COGL_HAS_GL
&yv12_fp_renderer,
&i420_fp_renderer,
#endif
&ayuv_glsl_renderer,
NULL
};
/* get the features */
gl_extensions = (const gchar*) glGetString (GL_EXTENSIONS);
glGetIntegerv (CGL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &nb_texture_units);
if (nb_texture_units >= 3)
features |= CLUTTER_GST_MULTI_TEXTURE;
#ifdef CLUTTER_COGL_HAS_GL
if (cogl_check_extension ("GL_ARB_fragment_program", gl_extensions))
{
/* the shaders we'll feed to the GPU are simple enough, we don't need
* to check GL limits for GL_FRAGMENT_PROGRAM_ARB */
syms->glGenProgramsARB = (GLGENPROGRAMSPROC)
cogl_get_proc_address ("glGenProgramsARB");
syms->glBindProgramARB = (GLBINDPROGRAMPROC)
cogl_get_proc_address ("glBindProgramARB");
syms->glProgramStringARB = (GLPROGRAMSTRINGPROC)
cogl_get_proc_address ("glProgramStringARB");
if (syms->glGenProgramsARB &&
syms->glBindProgramARB &&
syms->glProgramStringARB)
{
features |= CLUTTER_GST_FP;
}
}
#endif
if (cogl_features_available (COGL_FEATURE_SHADERS_GLSL))
features |= CLUTTER_GST_GLSL;
GST_INFO ("GL features: 0x%08x", features);
for (i = 0; renderers[i]; i++)
{
gint needed = renderers[i]->flags;
if ((needed & features) == needed)
list = g_slist_prepend (list, renderers[i]);
}
return list;
}
static ClutterFeatureFlags
clutter_backend_glx_get_features (ClutterBackend *backend)
{
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
const gchar *glx_extensions = NULL;
ClutterFeatureFlags flags;
flags = clutter_backend_x11_get_features (backend);
flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
/* this will make sure that the GL context exists and
* it's bound to a drawable
*/
g_assert (backend_glx->gl_context != None);
g_assert (glXGetCurrentDrawable () != None);
CLUTTER_NOTE (BACKEND, "Checking features\n"
"GL_VENDOR: %s\n"
"GL_RENDERER: %s\n"
"GL_VERSION: %s\n"
"GL_EXTENSIONS: %s\n",
glGetString (GL_VENDOR),
glGetString (GL_RENDERER),
glGetString (GL_VERSION),
glGetString (GL_EXTENSIONS));
glx_extensions =
glXQueryExtensionsString (clutter_x11_get_default_display (),
clutter_x11_get_default_screen ());
CLUTTER_NOTE (BACKEND, "GLX Extensions: %s", glx_extensions);
/* First check for explicit disabling or it set elsewhere (eg NVIDIA) */
if (getenv("__GL_SYNC_TO_VBLANK") || check_vblank_env ("none"))
{
CLUTTER_NOTE (BACKEND, "vblank sync: disabled at user request");
}
else
{
/* We try two GL vblank syncing mechanisms.
* glXSwapIntervalSGI is tried first, then glXGetVideoSyncSGI.
*
* glXSwapIntervalSGI is known to work with Mesa and in particular
* the Intel drivers. glXGetVideoSyncSGI has serious problems with
* Intel drivers causing terrible frame rate so it only tried as a
* fallback.
*
* How well glXGetVideoSyncSGI works with other driver (ATI etc) needs
* to be investigated. glXGetVideoSyncSGI on ATI at least seems to have
* no effect.
*/
if (!check_vblank_env ("dri") &&
cogl_check_extension ("GLX_SGI_swap_control", glx_extensions))
{
backend_glx->swap_interval =
(SwapIntervalProc) cogl_get_proc_address ("glXSwapIntervalSGI");
CLUTTER_NOTE (BACKEND, "attempting glXSwapIntervalSGI vblank setup");
if (backend_glx->swap_interval != NULL)
{
if (backend_glx->swap_interval (1) == 0)
{
backend_glx->vblank_type = CLUTTER_VBLANK_GLX_SWAP;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI setup success");
}
}
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI vblank setup failed");
}
if (!check_vblank_env ("dri") &&
!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK) &&
cogl_check_extension ("GLX_SGI_video_sync", glx_extensions))
{
CLUTTER_NOTE (BACKEND, "attempting glXGetVideoSyncSGI vblank setup");
backend_glx->get_video_sync =
(GetVideoSyncProc) cogl_get_proc_address ("glXGetVideoSyncSGI");
backend_glx->wait_video_sync =
(WaitVideoSyncProc) cogl_get_proc_address ("glXWaitVideoSyncSGI");
if ((backend_glx->get_video_sync != NULL) &&
(backend_glx->wait_video_sync != NULL))
{
CLUTTER_NOTE (BACKEND,
"glXGetVideoSyncSGI vblank setup success");
backend_glx->vblank_type = CLUTTER_VBLANK_GLX;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
}
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
CLUTTER_NOTE (BACKEND, "glXGetVideoSyncSGI vblank setup failed");
}
#ifdef __linux__
/*
* DRI is really an extreme fallback -rumoured to work with Via chipsets
*/
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
{
CLUTTER_NOTE (BACKEND, "attempting DRI vblank setup");
backend_glx->dri_fd = open("/dev/dri/card0", O_RDWR);
if (backend_glx->dri_fd >= 0)
{
CLUTTER_NOTE (BACKEND, "DRI vblank setup success");
backend_glx->vblank_type = CLUTTER_VBLANK_DRI;
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
}
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
CLUTTER_NOTE (BACKEND, "DRI vblank setup failed");
}
#endif
if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
{
CLUTTER_NOTE (BACKEND,
"no use-able vblank mechanism found");
}
}
CLUTTER_NOTE (MISC, "backend features checked");
return flags;
}
CoglHandle
meta_texture_rectangle_new (unsigned int width,
unsigned int height,
CoglTextureFlags flags,
CoglPixelFormat format,
GLenum internal_gl_format,
GLenum internal_format,
unsigned int rowstride,
const guint8 *data)
{
CoglHandle cogl_tex = COGL_INVALID_HANDLE;
#ifdef GL_TEXTURE_RECTANGLE_ARB
static CoglUserDataKey user_data_key;
GLint old_binding;
GLuint tex;
if (pf_glGenTextures == NULL)
{
pf_glGetIntegerv = (void *) cogl_get_proc_address ("glGetIntegerv");
pf_glTexImage2D = (void *) cogl_get_proc_address ("glTexImage2D");
pf_glGenTextures = (void *) cogl_get_proc_address ("glGenTextures");
pf_glDeleteTextures = (void *) cogl_get_proc_address ("glDeleteTextures");
pf_glBindTexture = (void *) cogl_get_proc_address ("glBindTexture");
}
pf_glGenTextures (1, &tex);
pf_glGetIntegerv (GL_TEXTURE_BINDING_RECTANGLE_ARB, &old_binding);
pf_glBindTexture (GL_TEXTURE_RECTANGLE_ARB, tex);
pf_glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0,
internal_gl_format, width, height,
0, internal_gl_format,
GL_UNSIGNED_BYTE, NULL);
pf_glBindTexture (GL_TEXTURE_RECTANGLE_ARB, old_binding);
cogl_tex = cogl_texture_new_from_foreign (tex,
GL_TEXTURE_RECTANGLE_ARB,
width, height,
0, 0, /* no waste */
internal_format);
/* Cogl won't destroy the GL texture when a foreign texture is used
so we need to destroy it manually. We can set a destroy
notification callback to do this transparently */
cogl_object_set_user_data (cogl_tex,
&user_data_key,
GUINT_TO_POINTER (tex),
rectangle_texture_destroy_cb);
/* Use cogl_texture_set_region instead of uploading the data
directly with GL calls so that we can let Cogl deal with setting
the pixel store parameters and handling format conversion */
if (data)
cogl_texture_set_region (cogl_tex,
0, 0, /* src x/y */
0, 0, /* dst x/y */
width, height, /* dst width/height */
width, height, /* src width/height */
format,
rowstride,
data);
#endif /* GL_TEXTURE_RECTANGLE_ARB */
return cogl_tex;
}
