mesa: Make FEATURE_EXT_transform_feedback more modular.

This allows transformfeedback.h and st_cb_xformfb.h to be included and
used without knowing if FEATURE_EXT_transform_feedback is enabled.  Fix
build of ES overlay.

3 files changed, 61 insertions, 10 deletions

diff --git a/src/mesa/main/api_exec.c b/src/mesa/main/api_exec.c
index f838561aef3..8fa8887a6c9 100644
--- a/src/mesa/main/api_exec.c
+++ b/src/mesa/main/api_exec.c
@@ -523,15 +523,7 @@ _mesa_create_exec_table(void)
    SET_DepthBoundsEXT(exec, _mesa_DepthBoundsEXT);
 
    /* 352. GL_EXT_transform_feedback */
-#if _HAVE_FULL_GL
-   SET_BeginTransformFeedbackEXT(exec, _mesa_BeginTransformFeedback);
-   SET_EndTransformFeedbackEXT(exec, _mesa_EndTransformFeedback);
-   SET_BindBufferRangeEXT(exec, _mesa_BindBufferRange);
-   SET_BindBufferBaseEXT(exec, _mesa_BindBufferBase);
-   SET_BindBufferOffsetEXT(exec, _mesa_BindBufferOffsetEXT);
-   SET_TransformFeedbackVaryingsEXT(exec, _mesa_TransformFeedbackVaryings);
-   SET_GetTransformFeedbackVaryingEXT(exec, _mesa_GetTransformFeedbackVarying);
-#endif
+   _mesa_init_transform_feedback_dispatch(exec);
 
    /* 364. GL_EXT_provoking_vertex */
    SET_ProvokingVertexEXT(exec, _mesa_ProvokingVertexEXT);
diff --git a/src/mesa/main/transformfeedback.c b/src/mesa/main/transformfeedback.c
index 06a12814e2d..cd3dd9b38c1 100644
--- a/src/mesa/main/transformfeedback.c
+++ b/src/mesa/main/transformfeedback.c
@@ -35,11 +35,15 @@
 #include "context.h"
 #include "hash.h"
 #include "transformfeedback.h"
+#include "main/dispatch.h"
 
 #include "shader/prog_parameter.h"
 #include "shader/shader_api.h"
 
 
+#if FEATURE_EXT_transform_feedback
+
+
 /**
  * Do reference counting of transform feedback buffers.
  */
@@ -281,6 +285,18 @@ _mesa_init_transform_feedback_functions(struct dd_function_table *driver)
 }
 
 
+void
+_mesa_init_transform_feedback_dispatch(struct _glapi_table *disp)
+{
+   SET_BeginTransformFeedbackEXT(disp, _mesa_BeginTransformFeedback);
+   SET_EndTransformFeedbackEXT(disp, _mesa_EndTransformFeedback);
+   SET_BindBufferRangeEXT(disp, _mesa_BindBufferRange);
+   SET_BindBufferBaseEXT(disp, _mesa_BindBufferBase);
+   SET_BindBufferOffsetEXT(disp, _mesa_BindBufferOffsetEXT);
+   SET_TransformFeedbackVaryingsEXT(disp, _mesa_TransformFeedbackVaryings);
+   SET_GetTransformFeedbackVaryingEXT(disp, _mesa_GetTransformFeedbackVarying);
+}
+
 
 /**
  ** Begin API functions
@@ -879,3 +895,6 @@ GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED
 GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE
 GL_TRANSFORM_FEEDBACK_BINDING
 */
+
+
+#endif /* FEATURE_EXT_transform_feedback */
diff --git a/src/mesa/main/transformfeedback.h b/src/mesa/main/transformfeedback.h
index 99f75ee4357..b806488abdd 100644
--- a/src/mesa/main/transformfeedback.h
+++ b/src/mesa/main/transformfeedback.h
@@ -25,9 +25,11 @@
 #ifndef TRANSFORM_FEEDBACK_H
 #define TRANSFORM_FEEDBACK_H
 
-#include "glheader.h"
+#include "main/mtypes.h"
 
 
+#if FEATURE_EXT_transform_feedback
+
 extern GLboolean
 _mesa_validate_primitive_mode(GLcontext *ctx, GLenum mode);
 
@@ -44,6 +46,9 @@ _mesa_free_transform_feedback(GLcontext *ctx);
 extern void
 _mesa_init_transform_feedback_functions(struct dd_function_table *driver);
 
+extern void
+_mesa_init_transform_feedback_dispatch(struct _glapi_table *disp);
+
 
 /*** GL_EXT_transform_feedback ***/
 
@@ -98,5 +103,40 @@ _mesa_ResumeTransformFeedback(void);
 extern void GLAPIENTRY
 _mesa_DrawTransformFeedback(GLenum mode, GLuint name);
 
+#else /* FEATURE_EXT_transform_feedback */
+
+static INLINE GLboolean
+_mesa_validate_primitive_mode(GLcontext *ctx, GLenum mode)
+{
+   return GL_TRUE;
+}
+
+static INLINE GLboolean
+_mesa_validate_transform_feedback_buffers(GLcontext *ctx)
+{
+   return GL_TRUE;
+}
+
+static INLINE void
+_mesa_init_transform_feedback(GLcontext *ctx)
+{
+}
+
+static INLINE void
+_mesa_free_transform_feedback(GLcontext *ctx)
+{
+}
+
+static INLINE void
+_mesa_init_transform_feedback_functions(struct dd_function_table *driver)
+{
+}
+
+static INLINE void
+_mesa_init_transform_feedback_dispatch(struct _glapi_table *disp)
+{
+}
+
+#endif /* FEATURE_EXT_transform_feedback */
 
 #endif /* TRANSFORM_FEEDBACK_H */