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Lower the priority of the GLSL pipeline backend

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Now that the GLSL backend can generate code it can effectively handle
any pipeline unless there is an ARBfp program. However with current
open source GL drivers the ARBfp compiler is more stable so it makes
sense to prefer ARBfp when possible. The GLSL backend is also lower
than the fixed function backend on the assumption that any driver that
supports GLSL will also support ARBfp so it's quicker to try the fixed
function backend next.
This commit is contained in:
Neil Roberts 2010-11-24 17:42:34 +00:00
parent d19f6212ce
commit b9176e8672
1 changed files with 6 additions and 6 deletions
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12
clutter/cogl/cogl/cogl-pipeline-private.h
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@ -43,12 +43,12 @@ typedef struct _CoglPipelineLayer CoglPipelineLayer;
#if defined (HAVE_COGL_GL)
/* NB: pipeline->backend is currently a 3bit unsigned int bitfield */
#define COGL_PIPELINE_BACKEND_GLSL 0
#define COGL_PIPELINE_BACKEND_GLSL_MASK (1L<<0)
#define COGL_PIPELINE_BACKEND_ARBFP 1
#define COGL_PIPELINE_BACKEND_ARBFP_MASK (1L<<1)
#define COGL_PIPELINE_BACKEND_FIXED 2
#define COGL_PIPELINE_BACKEND_FIXED_MASK (1L<<2)
#define COGL_PIPELINE_BACKEND_ARBFP 0
#define COGL_PIPELINE_BACKEND_ARBFP_MASK (1L<<0)
#define COGL_PIPELINE_BACKEND_FIXED 1
#define COGL_PIPELINE_BACKEND_FIXED_MASK (1L<<1)
#define COGL_PIPELINE_BACKEND_GLSL 2
#define COGL_PIPELINE_BACKEND_GLSL_MASK (1L<<2)
#define COGL_PIPELINE_N_BACKENDS 3