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 "bufferobj.h"
  31 #include "compiler.h"
  32 #include "glheader.h"
  33 #include "mtypes.h"
  34
  35 struct _glapi_table;
  36 struct dd_function_table;
  37 struct gl_context;
  38
  39 extern void
  40 _mesa_init_transform_feedback(struct gl_context *ctx);
  41
  42 extern void
  43 _mesa_free_transform_feedback(struct gl_context *ctx);
  44
  45 extern GLboolean
  46 _mesa_validate_transform_feedback_buffers(struct gl_context *ctx);
  47
  48
  49 extern void
  50 _mesa_init_transform_feedback_functions(struct dd_function_table *driver);
  51
  52 extern unsigned
  53 _mesa_compute_max_transform_feedback_vertices(
  54       const struct gl_transform_feedback_object *obj,
  55       const struct gl_transform_feedback_info *info);
  56
  57
  58 /*** GL_EXT_transform_feedback ***/
  59
  60 extern void GLAPIENTRY
  61 _mesa_BeginTransformFeedback(GLenum mode);
  62
  63 extern void GLAPIENTRY
  64 _mesa_EndTransformFeedback(void);
  65
  66 extern void
  67 _mesa_bind_buffer_range_transform_feedback(struct gl_context *ctx,
  68                                            GLuint index,
  69                                            struct gl_buffer_object *bufObj,
  70                                            GLintptr offset,
  71                                            GLsizeiptr size);
  72
  73 extern void
  74 _mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
  75                                           GLuint index,
  76                                           struct gl_buffer_object *bufObj);
  77
  78 extern void GLAPIENTRY
  79 _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
  80                           GLintptr offset);
  81
  82 extern void GLAPIENTRY
  83 _mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
  84                                 const GLchar * const *varyings,
  85                                 GLenum bufferMode);
  86
  87 extern void GLAPIENTRY
  88 _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
  89                                   GLsizei bufSize, GLsizei *length,
  90                                   GLsizei *size, GLenum *type, GLchar *name);
  91
  92
  93
  94 /*** GL_ARB_transform_feedback2 ***/
  95 extern void
  96 _mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
  97                                      GLuint name);
  98
  99 struct gl_transform_feedback_object *
 100 _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
 101
 102 extern void GLAPIENTRY
 103 _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
 104
 105 extern GLboolean GLAPIENTRY
 106 _mesa_IsTransformFeedback(GLuint name);
 107
 108 extern void GLAPIENTRY
 109 _mesa_BindTransformFeedback(GLenum target, GLuint name);
 110
 111 extern void GLAPIENTRY
 112 _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
 113
 114 extern void GLAPIENTRY
 115 _mesa_PauseTransformFeedback(void);
 116
 117 extern void GLAPIENTRY
 118 _mesa_ResumeTransformFeedback(void);
 119
 120 static inline bool
 121 _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
 122 {
 123    return ctx->TransformFeedback.CurrentObject->Active &&
 124       !ctx->TransformFeedback.CurrentObject->Paused;
 125 }
 126
 127 extern bool
 128 _mesa_transform_feedback_is_using_program(struct gl_context *ctx,
 129                                           struct gl_shader_program *shProg);
 130
 131 static inline void
 132 _mesa_set_transform_feedback_binding(struct gl_context *ctx,
 133                                      struct gl_transform_feedback_object *tfObj, GLuint index,
 134                                      struct gl_buffer_object *bufObj,
 135                                      GLintptr offset, GLsizeiptr size)
 136 {
 137    _mesa_reference_buffer_object(ctx, &tfObj->Buffers[index], bufObj);
 138
 139    tfObj->BufferNames[index]   = bufObj->Name;
 140    tfObj->Offset[index]        = offset;
 141    tfObj->RequestedSize[index] = size;
 142 }
 143
 144 #endif /* TRANSFORM_FEEDBACK_H */