[Mesa-dev] [PATCH 2/6] main: Added entry point for glTransformFeedbackBufferBase
Martin Peres
martin.peres at linux.intel.com
Thu Jan 29 04:55:22 PST 2015
v2: Review from Laura Ekstrand
- give more helpful error messages
- factor the lookup code for the xfb and objBuf
- replace some already-existing tabs with spaces
- add comments to explain the cases where xfb == 0 or buffer == 0
- fix the condition for binding the transform buffer or not
Signed-off-by: Martin Peres <martin.peres at linux.intel.com>
---
src/mapi/glapi/gen/ARB_direct_state_access.xml | 6 ++
src/mesa/main/bufferobj.c | 9 +-
src/mesa/main/tests/dispatch_sanity.cpp | 1 +
src/mesa/main/transformfeedback.c | 136 +++++++++++++++++++------
src/mesa/main/transformfeedback.h | 19 +++-
5 files changed, 135 insertions(+), 36 deletions(-)
diff --git a/src/mapi/glapi/gen/ARB_direct_state_access.xml b/src/mapi/glapi/gen/ARB_direct_state_access.xml
index 15b00c2..35d6906 100644
--- a/src/mapi/glapi/gen/ARB_direct_state_access.xml
+++ b/src/mapi/glapi/gen/ARB_direct_state_access.xml
@@ -14,6 +14,12 @@
<param name="ids" type="GLuint *" />
</function>
+ <function name="TransformFeedbackBufferBase" offset="assign">
+ <param name="xfb" type="GLuint" />
+ <param name="index" type="GLuint" />
+ <param name="buffer" type="GLuint" />
+ </function>
+
<!-- Texture object functions -->
<function name="CreateTextures" offset="assign">
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 0c1ce98..86532ea 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -3546,8 +3546,9 @@ _mesa_BindBufferRange(GLenum target, GLuint index,
switch (target) {
case GL_TRANSFORM_FEEDBACK_BUFFER:
- _mesa_bind_buffer_range_transform_feedback(ctx, index, bufObj,
- offset, size);
+ _mesa_bind_buffer_range_transform_feedback(ctx,
+ ctx->TransformFeedback.CurrentObject,
+ index, bufObj, offset, size);
return;
case GL_UNIFORM_BUFFER:
bind_buffer_range_uniform_buffer(ctx, index, bufObj, offset, size);
@@ -3611,7 +3612,9 @@ _mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer)
switch (target) {
case GL_TRANSFORM_FEEDBACK_BUFFER:
- _mesa_bind_buffer_base_transform_feedback(ctx, index, bufObj);
+ _mesa_bind_buffer_base_transform_feedback(ctx,
+ ctx->TransformFeedback.CurrentObject,
+ index, bufObj, false);
return;
case GL_UNIFORM_BUFFER:
bind_buffer_base_uniform_buffer(ctx, index, bufObj);
diff --git a/src/mesa/main/tests/dispatch_sanity.cpp b/src/mesa/main/tests/dispatch_sanity.cpp
index 5e7f7ae..166401a 100644
--- a/src/mesa/main/tests/dispatch_sanity.cpp
+++ b/src/mesa/main/tests/dispatch_sanity.cpp
@@ -956,6 +956,7 @@ const struct function gl_core_functions_possible[] = {
/* GL_ARB_direct_state_access */
{ "glCreateTransformFeedbacks", 45, -1 },
+ { "glTransformFeedbackBufferBase", 45, -1 },
{ "glCreateTextures", 45, -1 },
{ "glTextureStorage1D", 45, -1 },
{ "glTextureStorage2D", 45, -1 },
diff --git a/src/mesa/main/transformfeedback.c b/src/mesa/main/transformfeedback.c
index b0fca48..6583974 100644
--- a/src/mesa/main/transformfeedback.c
+++ b/src/mesa/main/transformfeedback.c
@@ -514,22 +514,24 @@ _mesa_EndTransformFeedback(void)
* Helper used by BindBufferRange() and BindBufferBase().
*/
static void
-bind_buffer_range(struct gl_context *ctx, GLuint index,
+bind_buffer_range(struct gl_context *ctx,
+ struct gl_transform_feedback_object *obj,
+ GLuint index,
struct gl_buffer_object *bufObj,
- GLintptr offset, GLsizeiptr size)
+ GLintptr offset, GLsizeiptr size,
+ bool dsa)
{
- struct gl_transform_feedback_object *obj =
- ctx->TransformFeedback.CurrentObject;
-
/* Note: no need to FLUSH_VERTICES or flag NewTransformFeedback, because
* transform feedback buffers can't be changed while transform feedback is
* active.
*/
- /* The general binding point */
- _mesa_reference_buffer_object(ctx,
- &ctx->TransformFeedback.CurrentBuffer,
- bufObj);
+ if (!dsa) {
+ /* The general binding point */
+ _mesa_reference_buffer_object(ctx,
+ &ctx->TransformFeedback.CurrentBuffer,
+ bufObj);
+ }
/* The per-attribute binding point */
_mesa_set_transform_feedback_binding(ctx, obj, index, bufObj, offset, size);
@@ -543,15 +545,12 @@ bind_buffer_range(struct gl_context *ctx, GLuint index,
*/
void
_mesa_bind_buffer_range_transform_feedback(struct gl_context *ctx,
- GLuint index,
- struct gl_buffer_object *bufObj,
- GLintptr offset,
- GLsizeiptr size)
+ struct gl_transform_feedback_object *obj,
+ GLuint index,
+ struct gl_buffer_object *bufObj,
+ GLintptr offset,
+ GLsizeiptr size)
{
- struct gl_transform_feedback_object *obj;
-
- obj = ctx->TransformFeedback.CurrentObject;
-
if (obj->Active) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBindBufferRange(transform feedback active)");
@@ -559,13 +558,15 @@ _mesa_bind_buffer_range_transform_feedback(struct gl_context *ctx,
}
if (index >= ctx->Const.MaxTransformFeedbackBuffers) {
- _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index);
+ _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d "
+ "out of bounds)", index);
return;
}
if (size & 0x3) {
/* must a multiple of four */
- _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size=%d)", (int) size);
+ _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size=%d)",
+ (int) size);
return;
}
@@ -576,38 +577,107 @@ _mesa_bind_buffer_range_transform_feedback(struct gl_context *ctx,
return;
}
- bind_buffer_range(ctx, index, bufObj, offset, size);
+ bind_buffer_range(ctx, obj, index, bufObj, offset, size, false);
}
/**
* Specify a buffer object to receive transform feedback results.
* As above, but start at offset = 0.
- * Called from the glBindBufferBase() function.
+ * Called from the glBindBufferBase() and glTransformFeedbackBufferBase()
+ * functions.
*/
void
_mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
- GLuint index,
- struct gl_buffer_object *bufObj)
+ struct gl_transform_feedback_object *obj,
+ GLuint index,
+ struct gl_buffer_object *bufObj,
+ bool dsa)
{
- struct gl_transform_feedback_object *obj;
-
- obj = ctx->TransformFeedback.CurrentObject;
-
if (obj->Active) {
_mesa_error(ctx, GL_INVALID_OPERATION,
- "glBindBufferBase(transform feedback active)");
+ "%s(transform feedback active)",
+ dsa?"glTransformFeedbackBufferBase":"glBindBufferBase");
return;
}
if (index >= ctx->Const.MaxTransformFeedbackBuffers) {
- _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
+ _mesa_error(ctx, GL_INVALID_VALUE, "%s(index=%d out of bounds)",
+ dsa?"glTransformFeedbackBufferBase":"glBindBufferBase",
+ index);
return;
}
- bind_buffer_range(ctx, index, bufObj, 0, 0);
+ bind_buffer_range(ctx, obj, index, bufObj, 0, 0, dsa);
}
+/**
+ * Wrapper around _mesa_lookup_transform_feedback_object that throws
+ * GL_INVALID_OPERATION if id is not in the hash table. After calling
+ * _mesa_error, it returns NULL.
+ */
+struct gl_transform_feedback_object *
+_mesa_lookup_transform_feedback_object_err(struct gl_context *ctx,
+ GLuint xfb, const char* func)
+{
+ struct gl_transform_feedback_object *obj;
+
+ obj = _mesa_lookup_transform_feedback_object(ctx, xfb);
+ if (!obj) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(xfb=%u: non-generated object name)", func, xfb);
+ }
+
+ return obj;
+}
+
+/**
+ * Wrapper around _mesa_lookup_bufferobj that throws GL_INVALID_VALUE if id
+ * is not in the hash table. After calling _mesa_error, it returns NULL.
+ */
+struct gl_buffer_object *
+_mesa_lookup_bufferobj_err(struct gl_context *ctx, GLuint buffer,
+ const char* func)
+{
+ struct gl_buffer_object *bufObj;
+
+ /* OpenGL 4.5 core profile, 13.2: buffer must be zero or the name of an
+ * existing buffer object.
+ */
+ if (buffer == 0) {
+ bufObj = ctx->Shared->NullBufferObj;
+ } else {
+ bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "%s(invalid buffer=%u)", func,
+ buffer);
+ }
+ }
+
+ return bufObj;
+}
+
+void GLAPIENTRY
+_mesa_TransformFeedbackBufferBase(GLuint xfb, GLuint index, GLuint buffer)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_transform_feedback_object *obj;
+ struct gl_buffer_object *bufObj;
+
+ obj = _mesa_lookup_transform_feedback_object_err(ctx, xfb,
+ "glTransformFeedbackBufferBase");
+ if(!obj) {
+ return;
+ }
+
+ bufObj = _mesa_lookup_bufferobj_err(ctx, buffer,
+ "glTransformFeedbackBufferBase");
+ if(!bufObj) {
+ return;
+ }
+
+ _mesa_bind_buffer_base_transform_feedback(ctx, obj, index, bufObj, true);
+}
/**
* Specify a buffer object to receive transform feedback results, plus the
@@ -660,7 +730,7 @@ _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
return;
}
- bind_buffer_range(ctx, index, bufObj, offset, 0);
+ bind_buffer_range(ctx, obj, index, bufObj, offset, 0, false);
}
@@ -817,6 +887,10 @@ _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
struct gl_transform_feedback_object *
_mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name)
{
+ /* OpenGL 4.5 core profile, 13.2: xfb must be zero, indicating the default
+ * transform feedback object, or the name of an existing transform
+ * feedback object.
+ */
if (name == 0) {
return ctx->TransformFeedback.DefaultObject;
}
diff --git a/src/mesa/main/transformfeedback.h b/src/mesa/main/transformfeedback.h
index d598533..2c4ce58 100644
--- a/src/mesa/main/transformfeedback.h
+++ b/src/mesa/main/transformfeedback.h
@@ -65,6 +65,7 @@ _mesa_EndTransformFeedback(void);
extern void
_mesa_bind_buffer_range_transform_feedback(struct gl_context *ctx,
+ struct gl_transform_feedback_object *obj,
GLuint index,
struct gl_buffer_object *bufObj,
GLintptr offset,
@@ -72,9 +73,10 @@ _mesa_bind_buffer_range_transform_feedback(struct gl_context *ctx,
extern void
_mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
+ struct gl_transform_feedback_object *obj,
GLuint index,
- struct gl_buffer_object *bufObj);
-
+ struct gl_buffer_object *bufObj,
+ bool dsa);
extern void GLAPIENTRY
_mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
GLintptr offset);
@@ -147,4 +149,17 @@ _mesa_set_transform_feedback_binding(struct gl_context *ctx,
tfObj->RequestedSize[index] = size;
}
+/*** GL_ARB_direct_state_access ***/
+
+struct gl_transform_feedback_object *
+_mesa_lookup_transform_feedback_object_err(struct gl_context *ctx,
+ GLuint xfb, const char* func);
+
+struct gl_buffer_object *
+_mesa_lookup_bufferobj_err(struct gl_context *ctx, GLuint buffer,
+ const char* func);
+
+extern void GLAPIENTRY
+_mesa_TransformFeedbackBufferBase(GLuint xfb, GLuint index, GLuint buffer);
+
#endif /* TRANSFORM_FEEDBACK_H */
--
2.2.2
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