void
_cogl_features_init (void)
{
CoglFeatureFlags flags = 0;
const char *gl_extensions;
GLint max_clip_planes = 0;
GLint num_stencil_bits = 0;
int gl_major = 0, gl_minor = 0;
int i;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_get_gl_version (&gl_major, &gl_minor);
flags = (COGL_FEATURE_TEXTURE_READ_PIXELS
| COGL_FEATURE_UNSIGNED_INT_INDICES);
gl_extensions = (const char*) glGetString (GL_EXTENSIONS);
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0) ||
_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
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;
for (i = 0; i < G_N_ELEMENTS (cogl_feature_data); i++)
if (_cogl_feature_check (cogl_feature_data + i,
gl_major, gl_minor,
gl_extensions))
flags |= cogl_feature_data[i].feature_flags;
/* Cache features */
ctx->feature_flags = flags;
ctx->features_cached = TRUE;
}
static gboolean
clutter_backend_wayland_create_context (ClutterBackend *backend,
GError **error)
{
ClutterBackendWayland *backend_wayland = CLUTTER_BACKEND_WAYLAND (backend);
const gchar *egl_extensions = NULL;
gboolean status;
int retry_cookie;
gboolean try_fallback;
GError *try_error = NULL;
if (backend_wayland->egl_context != EGL_NO_CONTEXT)
return TRUE;
#if defined(HAVE_COGL_GL)
eglBindAPI (EGL_OPENGL_API);
#else
eglBindAPI (EGL_OPENGL_ES_API);
#endif
egl_extensions = eglQueryString (backend_wayland->edpy, EGL_EXTENSIONS);
if (!_cogl_check_extension (_COGL_SURFACELESS_EXTENSION, egl_extensions))
{
g_debug("Could not find the " _COGL_SURFACELESS_EXTENSION
" extension; falling back to binding a dummy surface");
if (!make_dummy_surface(backend_wayland))
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Could not create dummy surface");
return FALSE;
}
}
else
{
backend_wayland->egl_config = NULL;
backend_wayland->egl_surface = EGL_NO_SURFACE;
}
retry_cookie = 0;
while (!(status = try_create_context (backend,
retry_cookie,
&try_fallback,
&try_error)) &&
try_fallback)
{
g_warning ("Failed to create context: %s\nWill try fallback...",
try_error->message);
g_error_free (try_error);
try_error = NULL;
retry_cookie++;
}
if (!status)
g_propagate_error (error, try_error);
return status;
}
gboolean
_cogl_check_driver_valid (GError **error)
{
int major, minor;
const char *gl_extensions;
if (!_cogl_get_gl_version (&major, &minor))
{
g_set_error (error,
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_UNKNOWN_VERSION,
"The OpenGL version could not be determined");
return FALSE;
}
/* GL 1.3 supports all of the required functionality in core */
if (COGL_CHECK_GL_VERSION (major, minor, 1, 3))
return TRUE;
gl_extensions = (const char*) glGetString (GL_EXTENSIONS);
/* OpenGL 1.2 is only supported if we have the multitexturing
extension */
if (!_cogl_check_extension ("GL_ARB_multitexture", gl_extensions))
{
g_set_error (error,
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_INVALID_VERSION,
"The OpenGL driver is missing "
"the GL_ARB_multitexture extension");
return FALSE;
}
/* OpenGL 1.2 is required */
if (!COGL_CHECK_GL_VERSION (major, minor, 1, 2))
{
g_set_error (error,
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_INVALID_VERSION,
"The OpenGL version of your driver (%i.%i) "
"is not compatible with Cogl",
major, minor);
return FALSE;
}
return TRUE;
}
static CoglBool
check_gl_version (CoglContext *ctx,
char **gl_extensions,
CoglError **error)
{
int major, minor;
if (!_cogl_get_gl_version (ctx, &major, &minor))
{
_cogl_set_error (error,
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_UNKNOWN_VERSION,
"The OpenGL version could not be determined");
return FALSE;
}
/* GL 1.3 supports all of the required functionality in core */
if (COGL_CHECK_GL_VERSION (major, minor, 1, 3))
return TRUE;
/* OpenGL 1.2 is only supported if we have the multitexturing
extension */
if (!_cogl_check_extension ("GL_ARB_multitexture", gl_extensions))
{
_cogl_set_error (error,
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_INVALID_VERSION,
"The OpenGL driver is missing "
"the GL_ARB_multitexture extension");
return FALSE;
}
/* OpenGL 1.2 is required */
if (!COGL_CHECK_GL_VERSION (major, minor, 1, 2))
{
_cogl_set_error (error,
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_INVALID_VERSION,
"The OpenGL version of your driver (%i.%i) "
"is not compatible with Cogl",
major, minor);
return FALSE;
}
return TRUE;
}
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;
}
static CoglBool
_cogl_driver_update_features (CoglContext *ctx,
CoglError **error)
{
CoglPrivateFeatureFlags private_flags = 0;
char **gl_extensions;
int gl_major = 0, gl_minor = 0;
/* We have to special case getting the pointer to the glGetString*
functions because we need to use them to determine what functions
we can expect */
ctx->glGetString =
(void *) _cogl_renderer_get_proc_address (ctx->display->renderer,
"glGetString",
TRUE);
ctx->glGetStringi =
(void *) _cogl_renderer_get_proc_address (ctx->display->renderer,
"glGetStringi",
TRUE);
ctx->glGetIntegerv =
(void *) _cogl_renderer_get_proc_address (ctx->display->renderer,
"glGetIntegerv",
TRUE);
gl_extensions = _cogl_context_get_gl_extensions (ctx);
if (!check_gl_version (ctx, gl_extensions, error))
return FALSE;
if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_WINSYS)))
{
char *all_extensions = g_strjoinv (" ", gl_extensions);
COGL_NOTE (WINSYS,
"Checking features\n"
" GL_VENDOR: %s\n"
" GL_RENDERER: %s\n"
" GL_VERSION: %s\n"
" GL_EXTENSIONS: %s",
ctx->glGetString (GL_VENDOR),
ctx->glGetString (GL_RENDERER),
_cogl_context_get_gl_version (ctx),
all_extensions);
g_free (all_extensions);
}
_cogl_get_gl_version (ctx, &gl_major, &gl_minor);
_cogl_gpu_info_init (ctx, &ctx->gpu);
ctx->glsl_major = 1;
ctx->glsl_minor = 1;
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0))
{
const char *glsl_version =
(char *)ctx->glGetString (GL_SHADING_LANGUAGE_VERSION);
parse_gl_version (glsl_version, &ctx->glsl_major, &ctx->glsl_minor);
}
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_UNSIGNED_INT_INDICES, TRUE);
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_DEPTH_RANGE, TRUE);
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 1, 4))
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_MIRRORED_REPEAT, TRUE);
_cogl_feature_check_ext_functions (ctx,
gl_major,
gl_minor,
gl_extensions);
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0) ||
_cogl_check_extension ("GL_ARB_texture_non_power_of_two", gl_extensions))
{
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_TEXTURE_NPOT, TRUE);
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_TEXTURE_NPOT_REPEAT, TRUE);
}
if (_cogl_check_extension ("GL_MESA_pack_invert", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_MESA_PACK_INVERT;
if (ctx->glGenRenderbuffers)
{
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
private_flags |= COGL_PRIVATE_FEATURE_QUERY_FRAMEBUFFER_BITS;
}
if (ctx->glBlitFramebuffer)
private_flags |= COGL_PRIVATE_FEATURE_OFFSCREEN_BLIT;
if (ctx->glRenderbufferStorageMultisampleIMG)
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_OFFSCREEN_MULTISAMPLE, TRUE);
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 3, 0) ||
_cogl_check_extension ("GL_ARB_depth_texture", gl_extensions))
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 1) ||
_cogl_check_extension ("GL_EXT_pixel_buffer_object", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_PBOS;
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 1, 4) ||
_cogl_check_extension ("GL_EXT_blend_color", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_BLEND_CONSTANT;
if (ctx->glGenPrograms)
private_flags |= COGL_PRIVATE_FEATURE_ARBFP;
if (ctx->glCreateProgram)
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_GLSL, TRUE);
else
{
/* If all of the old GLSL extensions are available then we can fake
* the GL 2.0 GLSL support by diverting to the old function names */
if (ctx->glCreateProgramObject && /* GL_ARB_shader_objects */
ctx->glVertexAttribPointer && /* GL_ARB_vertex_shader */
_cogl_check_extension ("GL_ARB_fragment_shader", gl_extensions))
{
ctx->glCreateShader = ctx->glCreateShaderObject;
ctx->glCreateProgram = ctx->glCreateProgramObject;
ctx->glDeleteShader = ctx->glDeleteObject;
ctx->glDeleteProgram = ctx->glDeleteObject;
ctx->glAttachShader = ctx->glAttachObject;
ctx->glUseProgram = ctx->glUseProgramObject;
ctx->glGetProgramInfoLog = ctx->glGetInfoLog;
ctx->glGetShaderInfoLog = ctx->glGetInfoLog;
ctx->glGetShaderiv = ctx->glGetObjectParameteriv;
ctx->glGetProgramiv = ctx->glGetObjectParameteriv;
ctx->glDetachShader = ctx->glDetachObject;
ctx->glGetAttachedShaders = ctx->glGetAttachedObjects;
/* FIXME: there doesn't seem to be an equivalent for glIsShader
* and glIsProgram. This doesn't matter for now because Cogl
* doesn't use these but if we add support for simulating a
* GLES2 context on top of regular GL then we'll need to do
* something here */
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_GLSL, TRUE);
}
}
if ((COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0) ||
_cogl_check_extension ("GL_ARB_point_sprite", gl_extensions)) &&
/* If GLSL is supported then we only enable point sprite support
* too if we have glsl >= 1.2 otherwise we don't have the
* gl_PointCoord builtin which we depend on in the glsl backend.
*/
(!COGL_FLAGS_GET (ctx->features, COGL_FEATURE_ID_GLSL) ||
COGL_CHECK_GL_VERSION (ctx->glsl_major, ctx->glsl_minor, 1, 2)))
{
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_POINT_SPRITE, TRUE);
}
if (ctx->glGenBuffers)
{
private_flags |= COGL_PRIVATE_FEATURE_VBOS;
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_MAP_BUFFER_FOR_READ, TRUE);
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE, TRUE);
}
if (_cogl_check_extension ("GL_ARB_texture_rectangle", gl_extensions))
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_TEXTURE_RECTANGLE, TRUE);
if (ctx->glTexImage3D)
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_TEXTURE_3D, TRUE);
if (ctx->glEGLImageTargetTexture2D)
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_2D_FROM_EGL_IMAGE;
if (_cogl_check_extension ("GL_EXT_packed_depth_stencil", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_EXT_PACKED_DEPTH_STENCIL;
if (ctx->glGenSamplers)
private_flags |= COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS;
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 3, 3) ||
_cogl_check_extension ("GL_ARB_texture_swizzle", gl_extensions) ||
_cogl_check_extension ("GL_EXT_texture_swizzle", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_SWIZZLE;
/* The per-vertex point size is only available via GLSL with the
* gl_PointSize builtin. This is only available in GL 2.0 (not the
* GLSL extensions) */
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0))
{
COGL_FLAGS_SET (ctx->features,
COGL_FEATURE_ID_PER_VERTEX_POINT_SIZE,
TRUE);
private_flags |= COGL_PRIVATE_FEATURE_ENABLE_PROGRAM_POINT_SIZE;
}
if (ctx->driver == COGL_DRIVER_GL)
{
int max_clip_planes = 0;
/* Features which are not available in GL 3 */
private_flags |= (COGL_PRIVATE_FEATURE_GL_FIXED |
COGL_PRIVATE_FEATURE_ALPHA_TEST |
COGL_PRIVATE_FEATURE_QUADS |
COGL_PRIVATE_FEATURE_ALPHA_TEXTURES);
GE( ctx, glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
if (max_clip_planes >= 4)
private_flags |= COGL_PRIVATE_FEATURE_FOUR_CLIP_PLANES;
}
private_flags |= (COGL_PRIVATE_FEATURE_READ_PIXELS_ANY_FORMAT |
COGL_PRIVATE_FEATURE_ANY_GL |
COGL_PRIVATE_FEATURE_FORMAT_CONVERSION |
COGL_PRIVATE_FEATURE_BLEND_CONSTANT |
COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM |
COGL_PRIVATE_FEATURE_QUERY_TEXTURE_PARAMETERS |
COGL_PRIVATE_FEATURE_TEXTURE_MAX_LEVEL);
if (ctx->glFenceSync)
COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_FENCE, TRUE);
/* Cache features */
ctx->private_feature_flags |= private_flags;
g_strfreev (gl_extensions);
if ((private_flags & (COGL_PRIVATE_FEATURE_ALPHA_TEXTURES |
COGL_PRIVATE_FEATURE_TEXTURE_SWIZZLE)) == 0)
{
_cogl_set_error (error,
COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_NO_SUITABLE_DRIVER_FOUND,
"The GL_ARB_texture_swizzle extension is required "
"to use the GL3 driver");
return FALSE;
}
return TRUE;
}
static CoglBool
_cogl_driver_update_features (CoglContext *context,
CoglError **error)
{
CoglPrivateFeatureFlags private_flags = 0;
CoglFeatureFlags flags = 0;
const char *gl_extensions;
int num_stencil_bits = 0;
/* We have to special case getting the pointer to the glGetString
function because we need to use it to determine what functions we
can expect */
context->glGetString =
(void *) _cogl_renderer_get_proc_address (context->display->renderer,
"glGetString",
TRUE);
COGL_NOTE (WINSYS,
"Checking features\n"
" GL_VENDOR: %s\n"
" GL_RENDERER: %s\n"
" GL_VERSION: %s\n"
" GL_EXTENSIONS: %s",
context->glGetString (GL_VENDOR),
context->glGetString (GL_RENDERER),
_cogl_context_get_gl_version (context),
_cogl_context_get_gl_extensions (context));
_cogl_gpu_info_init (context, &context->gpu);
gl_extensions = _cogl_context_get_gl_extensions (context);
_cogl_feature_check_ext_functions (context,
-1 /* GL major version */,
-1 /* GL minor version */,
gl_extensions);
GE( context, glGetIntegerv (GL_STENCIL_BITS, &num_stencil_bits) );
/* We need at least three stencil bits to combine clips */
if (num_stencil_bits > 2)
private_flags |= COGL_PRIVATE_FEATURE_STENCIL_BUFFER;
#ifdef HAVE_COGL_GLES
if (context->driver == COGL_DRIVER_GLES1)
{
int max_clip_planes;
GE( context, glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
if (max_clip_planes >= 4)
private_flags |= COGL_PRIVATE_FEATURE_FOUR_CLIP_PLANES;
}
#endif
if (context->driver == COGL_DRIVER_GLES2)
{
flags |= COGL_FEATURE_SHADERS_GLSL | COGL_FEATURE_OFFSCREEN;
/* Note GLES 2 core doesn't support mipmaps for npot textures or
* repeat modes other than CLAMP_TO_EDGE. */
flags |= COGL_FEATURE_TEXTURE_NPOT_BASIC;
flags |= COGL_FEATURE_DEPTH_RANGE;
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_GLSL, TRUE);
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_RANGE, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_MIRRORED_REPEAT, TRUE);
}
private_flags |= COGL_PRIVATE_FEATURE_VBOS;
/* Both GLES 1.1 and GLES 2.0 support point sprites in core */
flags |= COGL_FEATURE_POINT_SPRITE;
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_POINT_SPRITE, TRUE);
if (context->glGenRenderbuffers)
{
flags |= COGL_FEATURE_OFFSCREEN;
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
}
if (context->glBlitFramebuffer)
private_flags |= COGL_PRIVATE_FEATURE_OFFSCREEN_BLIT;
if (_cogl_check_extension ("GL_OES_element_index_uint", gl_extensions))
{
flags |= COGL_FEATURE_UNSIGNED_INT_INDICES;
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_UNSIGNED_INT_INDICES, TRUE);
}
if (_cogl_check_extension ("GL_OES_depth_texture", gl_extensions))
{
flags |= COGL_FEATURE_DEPTH_TEXTURE;
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
}
if (_cogl_check_extension ("GL_OES_texture_npot", gl_extensions))
{
flags |= (COGL_FEATURE_TEXTURE_NPOT |
COGL_FEATURE_TEXTURE_NPOT_BASIC |
COGL_FEATURE_TEXTURE_NPOT_MIPMAP |
COGL_FEATURE_TEXTURE_NPOT_REPEAT);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_REPEAT, TRUE);
}
else if (_cogl_check_extension ("GL_IMG_texture_npot", gl_extensions))
{
flags |= (COGL_FEATURE_TEXTURE_NPOT_BASIC |
COGL_FEATURE_TEXTURE_NPOT_MIPMAP);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
}
if (context->glTexImage3D)
{
flags |= COGL_FEATURE_TEXTURE_3D;
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_TEXTURE_3D, TRUE);
}
if (context->glMapBuffer)
{
/* The GL_OES_mapbuffer extension doesn't support mapping for
read */
flags |= COGL_FEATURE_MAP_BUFFER_FOR_WRITE;
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE, TRUE);
}
if (context->glEGLImageTargetTexture2D)
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_2D_FROM_EGL_IMAGE;
if (_cogl_check_extension ("GL_OES_packed_depth_stencil", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL;
if (_cogl_check_extension ("GL_EXT_texture_format_BGRA8888", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_FORMAT_BGRA8888;
if (_cogl_check_extension ("GL_EXT_unpack_subimage", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_UNPACK_SUBIMAGE;
/* Cache features */
context->private_feature_flags |= private_flags;
context->feature_flags |= flags;
return TRUE;
}
gboolean
cogl_clutter_check_extension (const char *name, const char *ext)
{
return _cogl_check_extension (name, ext);
}
static CoglBool
_cogl_driver_update_features (CoglContext *context,
CoglError **error)
{
CoglPrivateFeatureFlags private_flags = 0;
char **gl_extensions;
/* We have to special case getting the pointer to the glGetString
function because we need to use it to determine what functions we
can expect */
context->glGetString =
(void *) _cogl_renderer_get_proc_address (context->display->renderer,
"glGetString",
TRUE);
gl_extensions = _cogl_context_get_gl_extensions (context);
if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_WINSYS)))
{
char *all_extensions = g_strjoinv (" ", gl_extensions);
COGL_NOTE (WINSYS,
"Checking features\n"
" GL_VENDOR: %s\n"
" GL_RENDERER: %s\n"
" GL_VERSION: %s\n"
" GL_EXTENSIONS: %s",
context->glGetString (GL_VENDOR),
context->glGetString (GL_RENDERER),
_cogl_context_get_gl_version (context),
all_extensions);
g_free (all_extensions);
}
context->glsl_major = 1;
context->glsl_minor = 0;
_cogl_gpu_info_init (context, &context->gpu);
_cogl_feature_check_ext_functions (context,
-1 /* GL major version */,
-1 /* GL minor version */,
gl_extensions);
#ifdef HAVE_COGL_GLES
if (context->driver == COGL_DRIVER_GLES1)
{
int max_clip_planes;
GE( context, glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
if (max_clip_planes >= 4)
private_flags |= COGL_PRIVATE_FEATURE_FOUR_CLIP_PLANES;
}
#endif
if (context->driver == COGL_DRIVER_GLES2)
{
/* Note GLES 2 core doesn't support mipmaps for npot textures or
* repeat modes other than CLAMP_TO_EDGE. */
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_GLSL, TRUE);
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_RANGE, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_MIRRORED_REPEAT, TRUE);
private_flags |= COGL_PRIVATE_FEATURE_BLEND_CONSTANT;
}
else if (context->driver == COGL_DRIVER_GLES1)
private_flags |= (COGL_PRIVATE_FEATURE_FIXED_FUNCTION |
COGL_PRIVATE_FEATURE_ALPHA_TEST |
COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM);
private_flags |= (COGL_PRIVATE_FEATURE_VBOS |
COGL_PRIVATE_FEATURE_ANY_GL |
COGL_PRIVATE_FEATURE_ALPHA_TEXTURES);
/* Both GLES 1.1 and GLES 2.0 support point sprites in core */
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_POINT_SPRITE, TRUE);
if (context->glGenRenderbuffers)
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
if (context->glBlitFramebuffer)
private_flags |= COGL_PRIVATE_FEATURE_OFFSCREEN_BLIT;
if (_cogl_check_extension ("GL_OES_element_index_uint", gl_extensions))
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_UNSIGNED_INT_INDICES, TRUE);
if (_cogl_check_extension ("GL_OES_depth_texture", gl_extensions))
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
if (_cogl_check_extension ("GL_OES_texture_npot", gl_extensions))
{
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_REPEAT, TRUE);
}
else if (_cogl_check_extension ("GL_IMG_texture_npot", gl_extensions))
{
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, TRUE);
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, TRUE);
}
if (context->glTexImage3D)
COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_TEXTURE_3D, TRUE);
if (context->glMapBuffer)
/* The GL_OES_mapbuffer extension doesn't support mapping for
read */
COGL_FLAGS_SET (context->features,
COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE, TRUE);
if (context->glEGLImageTargetTexture2D)
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_2D_FROM_EGL_IMAGE;
if (_cogl_check_extension ("GL_OES_packed_depth_stencil", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL;
if (_cogl_check_extension ("GL_EXT_texture_format_BGRA8888", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_FORMAT_BGRA8888;
if (_cogl_check_extension ("GL_EXT_unpack_subimage", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_UNPACK_SUBIMAGE;
/* Cache features */
context->private_feature_flags |= private_flags;
g_strfreev (gl_extensions);
return TRUE;
}
static gboolean
try_enable_drm (ClutterBackendWayland *backend_wayland, GError **error)
{
drm_magic_t magic;
const gchar *exts, *glexts;
if (backend_wayland->drm_fd < 0)
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Failed to open drm device");
return FALSE;
}
glexts = glGetString(GL_EXTENSIONS);
exts = eglQueryString (backend_wayland->edpy, EGL_EXTENSIONS);
if (!_cogl_check_extension ("EGL_KHR_image_base", exts) ||
!_cogl_check_extension ("EGL_MESA_drm_image", exts) ||
!_cogl_check_extension ("GL_OES_EGL_image", glexts))
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Missing EGL extensions");
return FALSE;
}
backend_wayland->create_drm_image =
(PFNEGLCREATEDRMIMAGEMESA) eglGetProcAddress ("eglCreateDRMImageMESA");
backend_wayland->destroy_image =
(PFNEGLDESTROYIMAGEKHRPROC) eglGetProcAddress ("eglDestroyImageKHR");
backend_wayland->export_drm_image =
(PFNEGLEXPORTDRMIMAGEMESA) eglGetProcAddress ("eglExportDRMImageMESA");
backend_wayland->image_target_texture_2d =
(PFNGLEGLIMAGETARGETTEXTURE2DOESPROC) eglGetProcAddress ("glEGLImageTargetTexture2DOES");
if (backend_wayland->create_drm_image == NULL ||
backend_wayland->destroy_image == NULL ||
backend_wayland->export_drm_image == NULL ||
backend_wayland->image_target_texture_2d == NULL)
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Missing EGL extensions");
return FALSE;
}
if (drmGetMagic (backend_wayland->drm_fd, &magic))
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Failed to get drm magic");
return FALSE;
}
wl_drm_authenticate (backend_wayland->wayland_drm, magic);
wl_display_iterate (backend_wayland->wayland_display, WL_DISPLAY_WRITABLE);
while (!backend_wayland->authenticated)
wl_display_iterate (backend_wayland->wayland_display, WL_DISPLAY_READABLE);
return TRUE;
};
