[Mesa-dev] [PATCH 2/6] main: Added entry point for glTransformFeedbackBufferBase
Laura Ekstrand
laura at jlekstrand.net
Thu Jan 29 10:30:29 PST 2015
On Thu, Jan 29, 2015 at 4:55 AM, Martin Peres <martin.peres at linux.intel.com>
wrote:
> 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;
> +}
> +
>
I already have a _mesa_lookup_bufferobj_err function in my patches for
buffer objects. That one is in bufferobj.c and throws INVALID_OPERATION
(which is useful for the buffer object DSA entry points). Since you need
this specialized one that throws INVALID_VALUE and accepts buffer = 0, I
think you should just rename this one and make it a static function inside
transformfeedback.c only.
> +/**
> + * 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
>
> _______________________________________________
> mesa-dev mailing list
> mesa-dev at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
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