src/mesa/main/transformfeedback.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2010  VMware, Inc.  All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #ifndef TRANSFORM_FEEDBACK_H
  27 #define TRANSFORM_FEEDBACK_H
  28
  29 #include <stdbool.h>
  30 #include "compiler.h"
  31 #include "glheader.h"
  32 #include "mtypes.h"
  33
  34 struct _glapi_table;
  35 struct dd_function_table;
  36 struct gl_context;
  37
  38 extern void
  39 _mesa_init_transform_feedback(struct gl_context *ctx);
  40
  41 extern void
  42 _mesa_free_transform_feedback(struct gl_context *ctx);
  43
  44 extern GLboolean
  45 _mesa_validate_transform_feedback_buffers(struct gl_context *ctx);
  46
  47
  48 extern void
  49 _mesa_init_transform_feedback_functions(struct dd_function_table *driver);
  50
  51 extern unsigned
  52 _mesa_compute_max_transform_feedback_vertices(
  53       const struct gl_transform_feedback_object *obj,
  54       const struct gl_transform_feedback_info *info);
  55
  56
  57 /*** GL_EXT_transform_feedback ***/
  58
  59 extern void GLAPIENTRY
  60 _mesa_BeginTransformFeedback(GLenum mode);
  61
  62 extern void GLAPIENTRY
  63 _mesa_EndTransformFeedback(void);
  64
  65 extern void
  66 _mesa_bind_buffer_range_transform_feedback(struct gl_context *ctx,
  67                                            GLuint index,
  68                                            struct gl_buffer_object *bufObj,
  69                                            GLintptr offset,
  70                                            GLsizeiptr size);
  71
  72 extern void
  73 _mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
  74                                           GLuint index,
  75                                           struct gl_buffer_object *bufObj);
  76
  77 extern void GLAPIENTRY
  78 _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
  79                           GLintptr offset);
  80
  81 extern void GLAPIENTRY
  82 _mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
  83                                 const GLchar * const *varyings,
  84                                 GLenum bufferMode);
  85
  86 extern void GLAPIENTRY
  87 _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
  88                                   GLsizei bufSize, GLsizei *length,
  89                                   GLsizei *size, GLenum *type, GLchar *name);
  90
  91
  92
  93 /*** GL_ARB_transform_feedback2 ***/
  94 extern void
  95 _mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
  96                                      GLuint name);
  97
  98 struct gl_transform_feedback_object *
  99 _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
 100
 101 extern void GLAPIENTRY
 102 _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
 103
 104 extern GLboolean GLAPIENTRY
 105 _mesa_IsTransformFeedback(GLuint name);
 106
 107 extern void GLAPIENTRY
 108 _mesa_BindTransformFeedback(GLenum target, GLuint name);
 109
 110 extern void GLAPIENTRY
 111 _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
 112
 113 extern void GLAPIENTRY
 114 _mesa_PauseTransformFeedback(void);
 115
 116 extern void GLAPIENTRY
 117 _mesa_ResumeTransformFeedback(void);
 118
 119 static inline bool
 120 _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
 121 {
 122    return ctx->TransformFeedback.CurrentObject->Active &&
 123       !ctx->TransformFeedback.CurrentObject->Paused;
 124 }
 125
 126 extern bool
 127 _mesa_transform_feedback_is_using_program(struct gl_context *ctx,
 128                                           struct gl_shader_program *shProg);
 129
 130 #endif /* TRANSFORM_FEEDBACK_H */