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 BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  20  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24
  25 #ifndef TRANSFORM_FEEDBACK_H
  26 #define TRANSFORM_FEEDBACK_H
  27
  28 #include <stdbool.h>
  29 #include "compiler.h"
  30 #include "glheader.h"
  31 #include "mtypes.h"
  32
  33 struct _glapi_table;
  34 struct dd_function_table;
  35 struct gl_context;
  36
  37 extern void
  38 _mesa_init_transform_feedback(struct gl_context *ctx);
  39
  40 extern void
  41 _mesa_free_transform_feedback(struct gl_context *ctx);
  42
  43 extern GLboolean
  44 _mesa_validate_transform_feedback_buffers(struct gl_context *ctx);
  45
  46
  47 extern void
  48 _mesa_init_transform_feedback_functions(struct dd_function_table *driver);
  49
  50 extern unsigned
  51 _mesa_compute_max_transform_feedback_vertices(
  52       const struct gl_transform_feedback_object *obj,
  53       const struct gl_transform_feedback_info *info);
  54
  55
  56 /*** GL_EXT_transform_feedback ***/
  57
  58 extern void GLAPIENTRY
  59 _mesa_BeginTransformFeedback(GLenum mode);
  60
  61 extern void GLAPIENTRY
  62 _mesa_EndTransformFeedback(void);
  63
  64 extern void
  65 _mesa_bind_buffer_range_transform_feedback(struct gl_context *ctx,
  66                                            GLuint index,
  67                                            struct gl_buffer_object *bufObj,
  68                                            GLintptr offset,
  69                                            GLsizeiptr size);
  70
  71 extern void
  72 _mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
  73                                           GLuint index,
  74                                           struct gl_buffer_object *bufObj);
  75
  76 extern void GLAPIENTRY
  77 _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
  78                           GLintptr offset);
  79
  80 extern void GLAPIENTRY
  81 _mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
  82                                 const GLchar * const *varyings,
  83                                 GLenum bufferMode);
  84
  85 extern void GLAPIENTRY
  86 _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
  87                                   GLsizei bufSize, GLsizei *length,
  88                                   GLsizei *size, GLenum *type, GLchar *name);
  89
  90
  91
  92 /*** GL_ARB_transform_feedback2 ***/
  93
  94 struct gl_transform_feedback_object *
  95 _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
  96
  97 extern void GLAPIENTRY
  98 _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
  99
 100 extern GLboolean GLAPIENTRY
 101 _mesa_IsTransformFeedback(GLuint name);
 102
 103 extern void GLAPIENTRY
 104 _mesa_BindTransformFeedback(GLenum target, GLuint name);
 105
 106 extern void GLAPIENTRY
 107 _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
 108
 109 extern void GLAPIENTRY
 110 _mesa_PauseTransformFeedback(void);
 111
 112 extern void GLAPIENTRY
 113 _mesa_ResumeTransformFeedback(void);
 114
 115 static inline bool
 116 _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
 117 {
 118    return ctx->TransformFeedback.CurrentObject->Active &&
 119       !ctx->TransformFeedback.CurrentObject->Paused;
 120 }
 121
 122 #endif /* TRANSFORM_FEEDBACK_H */