isa/mutter
1
0
Fork 0
mirror of https://github.com/brl/mutter.git synced 2024-11-29 03:20:46 -05:00
Code Issues Packages Projects Releases Wiki Activity

Don't try to use clip planes on GL3

Browse Source 
GL3 has support for clip planes but they are used differently and
involve writing to a builtin output variable in the vertex shader. The
current clip plane code assumes it is only used with a fixed function
driver and tries to directly push to the matrix builtins. This
obviously won't work on GL3 so for now let's just disable clip planes.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 5f621589467ab961f5130590298dc8e26d658a92)
This commit is contained in:
Neil Roberts 2012-12-13 16:28:41 +00:00 committed by Robert Bragg
parent 988486ac7d
commit 82615e292d
1 changed files with 13 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
cogl/driver/gl/gl/cogl-driver-gl.c
View File

@ -359,7 +359,6 @@ _cogl_driver_update_features (CoglContext *ctx,
CoglPrivateFeatureFlags private_flags = 0;
CoglFeatureFlags flags = 0;
char **gl_extensions;
int max_clip_planes = 0;
int gl_major = 0, gl_minor = 0;
/* We have to special case getting the pointer to the glGetString*
@ -449,10 +448,6 @@ _cogl_driver_update_features (CoglContext *ctx,
if (_cogl_check_extension ("GL_MESA_pack_invert", gl_extensions))
private_flags |= COGL_PRIVATE_FEATURE_MESA_PACK_INVERT;
GE( ctx, glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
if (max_clip_planes >= 4)
private_flags |= COGL_PRIVATE_FEATURE_FOUR_CLIP_PLANES;
if (ctx->glGenRenderbuffers)
{
flags |= COGL_FEATURE_OFFSCREEN;
@ -580,12 +575,20 @@ _cogl_driver_update_features (CoglContext *ctx,
private_flags |= COGL_PRIVATE_FEATURE_TEXTURE_SWIZZLE;
if (ctx->driver == COGL_DRIVER_GL)
{
int max_clip_planes = 0;
/* Features which are not available in GL 3 */
private_flags |= (COGL_PRIVATE_FEATURE_FIXED_FUNCTION |
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 |