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  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.  
  95. struct gl_transform_feedback_object *
  96. _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
  97.  
  98. extern void GLAPIENTRY
  99. _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
  100.  
  101. extern GLboolean GLAPIENTRY
  102. _mesa_IsTransformFeedback(GLuint name);
  103.  
  104. extern void GLAPIENTRY
  105. _mesa_BindTransformFeedback(GLenum target, GLuint name);
  106.  
  107. extern void GLAPIENTRY
  108. _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
  109.  
  110. extern void GLAPIENTRY
  111. _mesa_PauseTransformFeedback(void);
  112.  
  113. extern void GLAPIENTRY
  114. _mesa_ResumeTransformFeedback(void);
  115.  
  116. static inline bool
  117. _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
  118. {
  119.    return ctx->TransformFeedback.CurrentObject->Active &&
  120.       !ctx->TransformFeedback.CurrentObject->Paused;
  121. }
  122.  
  123. #endif /* TRANSFORM_FEEDBACK_H */
  124.