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( struct gl_context *ctx,
  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 bool
  67 _mesa_validate_buffer_range_xfb(struct gl_context *ctx,
  68                                 struct gl_transform_feedback_object *obj,
  69                                 GLuint index, struct gl_buffer_object *bufObj,
  70                                 GLintptr offset, GLsizeiptr size, bool dsa);
  71
  72 extern void
  73 _mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
  74                                           struct gl_transform_feedback_object *obj,
  75                                           GLuint index,
  76                                           struct gl_buffer_object *bufObj,
  77                                           bool dsa);
  78
  79 extern void GLAPIENTRY
  80 _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
  81                           GLintptr offset);
  82
  83 extern void GLAPIENTRY
  84 _mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
  85                                 const GLchar * const *varyings,
  86                                 GLenum bufferMode);
  87
  88 extern void GLAPIENTRY
  89 _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
  90                                   GLsizei bufSize, GLsizei *length,
  91                                   GLsizei *size, GLenum *type, GLchar *name);
  92
  93
  94
  95 /*** GL_ARB_transform_feedback2 ***/
  96 extern void
  97 _mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
  98                                      GLuint name);
  99
 100 struct gl_transform_feedback_object *
 101 _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
 102
 103 extern void GLAPIENTRY
 104 _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
 105
 106 extern void GLAPIENTRY
 107 _mesa_CreateTransformFeedbacks(GLsizei n, GLuint *names);
 108
 109 extern GLboolean GLAPIENTRY
 110 _mesa_IsTransformFeedback(GLuint name);
 111
 112 extern void GLAPIENTRY
 113 _mesa_BindTransformFeedback(GLenum target, GLuint name);
 114
 115 extern void GLAPIENTRY
 116 _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
 117
 118 extern void GLAPIENTRY
 119 _mesa_PauseTransformFeedback(void);
 120
 121 extern void GLAPIENTRY
 122 _mesa_ResumeTransformFeedback(void);
 123
 124 static inline bool
 125 _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
 126 {
 127    return ctx->TransformFeedback.CurrentObject->Active &&
 128       !ctx->TransformFeedback.CurrentObject->Paused;
 129 }
 130
 131 extern bool
 132 _mesa_transform_feedback_is_using_program(struct gl_context *ctx,
 133                                           struct gl_shader_program *shProg);
 134
 135 static inline void
 136 _mesa_set_transform_feedback_binding(struct gl_context *ctx,
 137                                      struct gl_transform_feedback_object *tfObj, GLuint index,
 138                                      struct gl_buffer_object *bufObj,
 139                                      GLintptr offset, GLsizeiptr size)
 140 {
 141    _mesa_reference_buffer_object(ctx, &tfObj->Buffers[index], bufObj);
 142
 143    tfObj->BufferNames[index]   = bufObj->Name;
 144    tfObj->Offset[index]        = offset;
 145    tfObj->RequestedSize[index] = size;
 146
 147    if (bufObj != ctx->Shared->NullBufferObj)
 148       bufObj->UsageHistory |= USAGE_TRANSFORM_FEEDBACK_BUFFER;
 149 }
 150
 151 static inline void
 152 _mesa_bind_buffer_range_xfb(struct gl_context *ctx,
 153                             struct gl_transform_feedback_object *obj,
 154                             GLuint index, struct gl_buffer_object *bufObj,
 155                             GLintptr offset, GLsizeiptr size)
 156 {
 157    /* Note: no need to FLUSH_VERTICES or flag NewTransformFeedback, because
 158     * transform feedback buffers can't be changed while transform feedback is
 159     * active.
 160     */
 161
 162    /* The general binding point */
 163    _mesa_reference_buffer_object(ctx,
 164                                  &ctx->TransformFeedback.CurrentBuffer,
 165                                  bufObj);
 166
 167    /* The per-attribute binding point */
 168    _mesa_set_transform_feedback_binding(ctx, obj, index, bufObj, offset, size);
 169 }
 170
 171 /*** GL_ARB_direct_state_access ***/
 172
 173 extern void GLAPIENTRY
 174 _mesa_TransformFeedbackBufferBase(GLuint xfb, GLuint index, GLuint buffer);
 175
 176 extern void GLAPIENTRY
 177 _mesa_TransformFeedbackBufferRange(GLuint xfb, GLuint index, GLuint buffer,
 178                                    GLintptr offset, GLsizeiptr size);
 179
 180 extern void GLAPIENTRY
 181 _mesa_GetTransformFeedbackiv(GLuint xfb, GLenum pname, GLint *param);
 182
 183 extern void GLAPIENTRY
 184 _mesa_GetTransformFeedbacki_v(GLuint xfb, GLenum pname, GLuint index,
 185                               GLint *param);
 186
 187 extern void GLAPIENTRY
 188 _mesa_GetTransformFeedbacki64_v(GLuint xfb, GLenum pname, GLuint index,
 189                                 GLint64 *param);
 190
 191 #endif /* TRANSFORM_FEEDBACK_H */