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/*
* Mesa 3-D graphics library
*
* Copyright (C) 2010 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef TRANSFORM_FEEDBACK_H
#define TRANSFORM_FEEDBACK_H
#include <stdbool.h>
#include "bufferobj.h"
#include "compiler.h"
#include "glheader.h"
#include "mtypes.h"
struct _glapi_table;
struct dd_function_table;
struct gl_context;
extern void
_mesa_init_transform_feedback(struct gl_context *ctx);
extern void
_mesa_free_transform_feedback(struct gl_context *ctx);
extern GLboolean
_mesa_validate_transform_feedback_buffers(struct gl_context *ctx);
extern void
_mesa_init_transform_feedback_functions(struct dd_function_table *driver);
extern unsigned
_mesa_compute_max_transform_feedback_vertices( struct gl_context *ctx,
const struct gl_transform_feedback_object *obj,
const struct gl_transform_feedback_info *info);
/*** GL_EXT_transform_feedback ***/
extern void GLAPIENTRY
_mesa_BeginTransformFeedback(GLenum mode);
extern void GLAPIENTRY
_mesa_EndTransformFeedback(void);
extern bool
_mesa_validate_buffer_range_xfb(struct gl_context *ctx,
struct gl_transform_feedback_object *obj,
GLuint index, struct gl_buffer_object *bufObj,
GLintptr offset, GLsizeiptr size, bool dsa);
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,
bool dsa);
extern void GLAPIENTRY
_mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
GLintptr offset);
extern void GLAPIENTRY
_mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
const GLchar * const *varyings,
GLenum bufferMode);
extern void GLAPIENTRY
_mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
GLsizei bufSize, GLsizei *length,
GLsizei *size, GLenum *type, GLchar *name);
/*** GL_ARB_transform_feedback2 ***/
extern void
_mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
GLuint name);
struct gl_transform_feedback_object *
_mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
extern void GLAPIENTRY
_mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
extern void GLAPIENTRY
_mesa_CreateTransformFeedbacks(GLsizei n, GLuint *names);
extern GLboolean GLAPIENTRY
_mesa_IsTransformFeedback(GLuint name);
extern void GLAPIENTRY
_mesa_BindTransformFeedback(GLenum target, GLuint name);
extern void GLAPIENTRY
_mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
extern void GLAPIENTRY
_mesa_PauseTransformFeedback(void);
extern void GLAPIENTRY
_mesa_ResumeTransformFeedback(void);
static inline bool
_mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
{
return ctx->TransformFeedback.CurrentObject->Active &&
!ctx->TransformFeedback.CurrentObject->Paused;
}
extern bool
_mesa_transform_feedback_is_using_program(struct gl_context *ctx,
struct gl_shader_program *shProg);
static inline void
_mesa_set_transform_feedback_binding(struct gl_context *ctx,
struct gl_transform_feedback_object *tfObj, GLuint index,
struct gl_buffer_object *bufObj,
GLintptr offset, GLsizeiptr size)
{
_mesa_reference_buffer_object(ctx, &tfObj->Buffers[index], bufObj);
tfObj->BufferNames[index] = bufObj->Name;
tfObj->Offset[index] = offset;
tfObj->RequestedSize[index] = size;
if (bufObj != ctx->Shared->NullBufferObj)
bufObj->UsageHistory |= USAGE_TRANSFORM_FEEDBACK_BUFFER;
}
static inline void
_mesa_bind_buffer_range_xfb(struct gl_context *ctx,
struct gl_transform_feedback_object *obj,
GLuint index, struct gl_buffer_object *bufObj,
GLintptr offset, GLsizeiptr size)
{
/* 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);
/* The per-attribute binding point */
_mesa_set_transform_feedback_binding(ctx, obj, index, bufObj, offset, size);
}
/*** GL_ARB_direct_state_access ***/
extern void GLAPIENTRY
_mesa_TransformFeedbackBufferBase(GLuint xfb, GLuint index, GLuint buffer);
extern void GLAPIENTRY
_mesa_TransformFeedbackBufferRange(GLuint xfb, GLuint index, GLuint buffer,
GLintptr offset, GLsizeiptr size);
extern void GLAPIENTRY
_mesa_GetTransformFeedbackiv(GLuint xfb, GLenum pname, GLint *param);
extern void GLAPIENTRY
_mesa_GetTransformFeedbacki_v(GLuint xfb, GLenum pname, GLuint index,
GLint *param);
extern void GLAPIENTRY
_mesa_GetTransformFeedbacki64_v(GLuint xfb, GLenum pname, GLuint index,
GLint64 *param);
#endif /* TRANSFORM_FEEDBACK_H */
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