Mesa (master): mesa: Always initialize transform feedback state.
Chia-I Wu
olv at kemper.freedesktop.org
Tue Jul 6 09:03:49 UTC 2010
Module: Mesa
Branch: master
Commit: 32a9b2799e5e1254fdf84af8248ea86e234d6dd4
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=32a9b2799e5e1254fdf84af8248ea86e234d6dd4
Author: Chia-I Wu <olv at lunarg.com>
Date: Tue Jul 6 16:27:20 2010 +0800
mesa: Always initialize transform feedback state.
Assert ctx->Driver.NewTransformFeedback if the feature is enabled; Use
the default callbacks otherwise. The rest of core mesa expects the
state to be initialized.
---
src/mesa/main/transformfeedback.c | 50 +++++++++++++++++++++++++++++++------
src/mesa/main/transformfeedback.h | 22 ++++------------
2 files changed, 48 insertions(+), 24 deletions(-)
diff --git a/src/mesa/main/transformfeedback.c b/src/mesa/main/transformfeedback.c
index 26a3a4b..f86f191 100644
--- a/src/mesa/main/transformfeedback.c
+++ b/src/mesa/main/transformfeedback.c
@@ -134,10 +134,8 @@ _mesa_validate_transform_feedback_buffers(GLcontext *ctx)
void
_mesa_init_transform_feedback(GLcontext *ctx)
{
- if (!ctx->Driver.NewTransformFeedback) {
- /* this feature/extension may not be supported by the driver */
- return;
- }
+ /* core mesa expects this, even a dummy one, to be available */
+ ASSERT(ctx->Driver.NewTransformFeedback);
ctx->TransformFeedback.DefaultObject =
ctx->Driver.NewTransformFeedback(ctx, 0);
@@ -178,10 +176,8 @@ delete_cb(GLuint key, void *data, void *userData)
void
_mesa_free_transform_feedback(GLcontext *ctx)
{
- if (!ctx->Driver.NewTransformFeedback) {
- /* this feature/extension may not be supported by the driver */
- return;
- }
+ /* core mesa expects this, even a dummy one, to be available */
+ ASSERT(ctx->Driver.NewTransformFeedback);
_mesa_reference_buffer_object(ctx,
&ctx->TransformFeedback.CurrentBuffer,
@@ -200,6 +196,40 @@ _mesa_free_transform_feedback(GLcontext *ctx)
}
+#else /* FEATURE_EXT_transform_feedback */
+
+/* forward declarations */
+static struct gl_transform_feedback_object *
+new_transform_feedback(GLcontext *ctx, GLuint name);
+
+static void
+delete_transform_feedback(GLcontext *ctx,
+ struct gl_transform_feedback_object *obj);
+
+/* dummy per-context init/clean-up for transform feedback */
+void
+_mesa_init_transform_feedback(GLcontext *ctx)
+{
+ ctx->TransformFeedback.DefaultObject = new_transform_feedback(ctx, 0);
+ ctx->TransformFeedback.CurrentObject = ctx->TransformFeedback.DefaultObject;
+ _mesa_reference_buffer_object(ctx,
+ &ctx->TransformFeedback.CurrentBuffer,
+ ctx->Shared->NullBufferObj);
+}
+
+void
+_mesa_free_transform_feedback(GLcontext *ctx)
+{
+ _mesa_reference_buffer_object(ctx,
+ &ctx->TransformFeedback.CurrentBuffer,
+ NULL);
+ ctx->TransformFeedback.CurrentObject = NULL;
+ delete_transform_feedback(ctx, ctx->TransformFeedback.DefaultObject);
+}
+
+#endif /* FEATURE_EXT_transform_feedback */
+
+
/** Default fallback for ctx->Driver.NewTransformFeedback() */
static struct gl_transform_feedback_object *
new_transform_feedback(GLcontext *ctx, GLuint name)
@@ -227,6 +257,10 @@ delete_transform_feedback(GLcontext *ctx,
free(obj);
}
+
+#if FEATURE_EXT_transform_feedback
+
+
/** Default fallback for ctx->Driver.BeginTransformFeedback() */
static void
begin_transform_feedback(GLcontext *ctx, GLenum mode,
diff --git a/src/mesa/main/transformfeedback.h b/src/mesa/main/transformfeedback.h
index b806488..4d38522 100644
--- a/src/mesa/main/transformfeedback.h
+++ b/src/mesa/main/transformfeedback.h
@@ -28,6 +28,12 @@
#include "main/mtypes.h"
+extern void
+_mesa_init_transform_feedback(GLcontext *ctx);
+
+extern void
+_mesa_free_transform_feedback(GLcontext *ctx);
+
#if FEATURE_EXT_transform_feedback
extern GLboolean
@@ -36,12 +42,6 @@ _mesa_validate_primitive_mode(GLcontext *ctx, GLenum mode);
extern GLboolean
_mesa_validate_transform_feedback_buffers(GLcontext *ctx);
-extern void
-_mesa_init_transform_feedback(GLcontext *ctx);
-
-extern void
-_mesa_free_transform_feedback(GLcontext *ctx);
-
extern void
_mesa_init_transform_feedback_functions(struct dd_function_table *driver);
@@ -118,16 +118,6 @@ _mesa_validate_transform_feedback_buffers(GLcontext *ctx)
}
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)
{
}
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