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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 "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.                                            struct gl_transform_feedback_object *obj,
  69.                                            GLuint index,
  70.                                            struct gl_buffer_object *bufObj,
  71.                                            GLintptr offset,
  72.                                            GLsizeiptr size, bool dsa);
  73.  
  74. extern void
  75. _mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
  76.                                           struct gl_transform_feedback_object *obj,
  77.                                           GLuint index,
  78.                                           struct gl_buffer_object *bufObj,
  79.                                           bool dsa);
  80.  
  81. extern void GLAPIENTRY
  82. _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
  83.                           GLintptr offset);
  84.  
  85. extern void GLAPIENTRY
  86. _mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
  87.                                 const GLchar * const *varyings,
  88.                                 GLenum bufferMode);
  89.  
  90. extern void GLAPIENTRY
  91. _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
  92.                                   GLsizei bufSize, GLsizei *length,
  93.                                   GLsizei *size, GLenum *type, GLchar *name);
  94.  
  95.  
  96.  
  97. /*** GL_ARB_transform_feedback2 ***/
  98. extern void
  99. _mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
  100.                                      GLuint name);
  101.  
  102. struct gl_transform_feedback_object *
  103. _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
  104.  
  105. extern void GLAPIENTRY
  106. _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
  107.  
  108. extern void GLAPIENTRY
  109. _mesa_CreateTransformFeedbacks(GLsizei n, GLuint *names);
  110.  
  111. extern GLboolean GLAPIENTRY
  112. _mesa_IsTransformFeedback(GLuint name);
  113.  
  114. extern void GLAPIENTRY
  115. _mesa_BindTransformFeedback(GLenum target, GLuint name);
  116.  
  117. extern void GLAPIENTRY
  118. _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
  119.  
  120. extern void GLAPIENTRY
  121. _mesa_PauseTransformFeedback(void);
  122.  
  123. extern void GLAPIENTRY
  124. _mesa_ResumeTransformFeedback(void);
  125.  
  126. static inline bool
  127. _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
  128. {
  129.    return ctx->TransformFeedback.CurrentObject->Active &&
  130.       !ctx->TransformFeedback.CurrentObject->Paused;
  131. }
  132.  
  133. extern bool
  134. _mesa_transform_feedback_is_using_program(struct gl_context *ctx,
  135.                                           struct gl_shader_program *shProg);
  136.  
  137. static inline void
  138. _mesa_set_transform_feedback_binding(struct gl_context *ctx,
  139.                                      struct gl_transform_feedback_object *tfObj, GLuint index,
  140.                                      struct gl_buffer_object *bufObj,
  141.                                      GLintptr offset, GLsizeiptr size)
  142. {
  143.    _mesa_reference_buffer_object(ctx, &tfObj->Buffers[index], bufObj);
  144.  
  145.    tfObj->BufferNames[index]   = bufObj->Name;
  146.    tfObj->Offset[index]        = offset;
  147.    tfObj->RequestedSize[index] = size;
  148. }
  149.  
  150. /*** GL_ARB_direct_state_access ***/
  151.  
  152. extern void GLAPIENTRY
  153. _mesa_TransformFeedbackBufferBase(GLuint xfb, GLuint index, GLuint buffer);
  154.  
  155. extern void GLAPIENTRY
  156. _mesa_TransformFeedbackBufferRange(GLuint xfb, GLuint index, GLuint buffer,
  157.                                    GLintptr offset, GLsizeiptr size);
  158.  
  159. extern void GLAPIENTRY
  160. _mesa_GetTransformFeedbackiv(GLuint xfb, GLenum pname, GLint *param);
  161.  
  162. extern void GLAPIENTRY
  163. _mesa_GetTransformFeedbacki_v(GLuint xfb, GLenum pname, GLuint index,
  164.                               GLint *param);
  165.  
  166. extern void GLAPIENTRY
  167. _mesa_GetTransformFeedbacki64_v(GLuint xfb, GLenum pname, GLuint index,
  168.                                 GLint64 *param);
  169.  
  170. #endif /* TRANSFORM_FEEDBACK_H */
  171.