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cogl-material: Always reset the GLSL program to zero when flushing

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When flushing a fixed-function or arbfp material it would always call
disable_glsl to try to get rid of the previous GLSL shader. This is
needed even if current_use_program_type is not GLSL because if an
application calls cogl_program_uniform then Cogl will have to bind the
program to set the uniform. If this happens then it won't update
current_use_program_type presumably because the enabled state of arbfp
is still valid.

The problem was that disable_glsl would only select program zero when
the current_use_program_type is set to GLSL which wouldn't be the case
if cogl_program_uniform was called. This patch changes it to just
directly call _cogl_gl_use_program_wrapper(0) instead of having a
separate disable_glsl function. The current program is cached in the
cogl context anyway so it shouldn't cause any extra unnecessary GL
calls.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2232
This commit is contained in:
Neil Roberts 2010-07-21 23:22:07 +01:00
parent 5b6298db10
commit 89286f6a47
1 changed files with 2 additions and 13 deletions
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15
cogl/cogl-material-opengl.c
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@ -310,17 +310,6 @@ _cogl_gl_use_program_wrapper (GLuint program)
#endif
}
static void
disable_glsl (void)
{
#ifdef COGL_MATERIAL_BACKEND_GLSL
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (ctx->current_use_program_type == COGL_MATERIAL_PROGRAM_TYPE_GLSL)
_cogl_gl_use_program_wrapper (0);
#endif
}
static void
disable_arbfp (void)
{
@ -367,7 +356,7 @@ _cogl_use_program (CoglHandle program_handle, CoglMaterialProgramType type)
/* _cogl_gl_use_program_wrapper can be called by cogl-program.c
* so we can't bailout without making sure we glUseProgram (0)
* first. */
disable_glsl ();
_cogl_gl_use_program_wrapper (0);
if (ctx->current_use_program_type == COGL_MATERIAL_PROGRAM_TYPE_ARBFP)
break;
@ -387,7 +376,7 @@ _cogl_use_program (CoglHandle program_handle, CoglMaterialProgramType type)
/* _cogl_gl_use_program_wrapper can be called by cogl-program.c
* so we can't bailout without making sure we glUseProgram (0)
* first. */
disable_glsl ();
_cogl_gl_use_program_wrapper (0);
if (ctx->current_use_program_type == COGL_MATERIAL_PROGRAM_TYPE_FIXED)
break;