Disable the fixed function backend for GLES2

GLES2 doesn't really support fixed function so if we disable it we can
remove the fixed function wrappers from the GLES2 Cogl backend.

clutter/cogl/cogl/cogl-pipeline-fixed.c

@@ -47,10 +47,6 @@
 #include <glib/gprintf.h>
 #include <string.h>
 
-#ifdef HAVE_COGL_GLES2
-#include "../gles/cogl-gles2-wrapper.h"
-#endif
-
 const CoglPipelineBackend _cogl_pipeline_fixed_backend;
 
 static int
@@ -235,13 +231,6 @@ _cogl_pipeline_backend_fixed_end (CoglPipeline *pipeline,
         GE (glDisable (GL_FOG));
     }
 
-#ifdef HAVE_COGL_GLES2
-  /* Let the GLES2 backend know that we're not using a user shader
-     anymore. This is a massive hack but it will go away once the GLSL
-     backend replaces the GLES2 wrapper */
-  _cogl_gles2_use_program (0);
-#endif
-
   return TRUE;
 }
 

clutter/cogl/cogl/cogl-pipeline-private.h

@@ -56,10 +56,8 @@ typedef struct _CoglPipelineLayer     CoglPipelineLayer;
 
 #define COGL_PIPELINE_BACKEND_GLSL       0
 #define COGL_PIPELINE_BACKEND_GLSL_MASK  (1L<<0)
-#define COGL_PIPELINE_BACKEND_FIXED      1
-#define COGL_PIPELINE_BACKEND_FIXED_MASK (1L<<1)
 
-#define COGL_PIPELINE_N_BACKENDS         2
+#define COGL_PIPELINE_N_BACKENDS         1
 
 #else /* HAVE_COGL_GLES */
 

clutter/cogl/cogl/cogl-pipeline.c

@@ -1173,8 +1173,10 @@ _cogl_pipeline_pre_change_notify (CoglPipeline     *pipeline,
    * code in response to a pipeline change therefore we don't want to
    * try searching for another backend when the pipeline changes.
    */
+#ifdef COGL_PIPELINE_BACKEND_FIXED
   if (pipeline->backend == COGL_PIPELINE_BACKEND_FIXED)
     _cogl_pipeline_set_backend (pipeline, COGL_PIPELINE_BACKEND_UNDEFINED);
+#endif
 
   if (pipeline->backend != COGL_PIPELINE_BACKEND_UNDEFINED &&
       _cogl_pipeline_backends[pipeline->backend]->pipeline_pre_change_notify)