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;
}
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 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;
}
