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 void
  46 _mesa_init_transform_feedback_functions(struct dd_function_table *driver);
  47
  48 extern unsigned
  49 _mesa_compute_max_transform_feedback_vertices( struct gl_context *ctx,
  50       const struct gl_transform_feedback_object *obj,
  51       const struct gl_transform_feedback_info *info);
  52
  53
  54 /*** GL_EXT_transform_feedback ***/
  55
  56 extern void GLAPIENTRY
  57 _mesa_BeginTransformFeedback(GLenum mode);
  58
  59 extern void GLAPIENTRY
  60 _mesa_EndTransformFeedback(void);
  61
  62 extern bool
  63 _mesa_validate_buffer_range_xfb(struct gl_context *ctx,
  64                                 struct gl_transform_feedback_object *obj,
  65                                 GLuint index, struct gl_buffer_object *bufObj,
  66                                 GLintptr offset, GLsizeiptr size, bool dsa);
  67
  68 extern void
  69 _mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
  70                                           struct gl_transform_feedback_object *obj,
  71                                           GLuint index,
  72                                           struct gl_buffer_object *bufObj,
  73                                           bool dsa);
  74
  75 extern void GLAPIENTRY
  76 _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
  77                           GLintptr offset);
  78
  79 extern void GLAPIENTRY
  80 _mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
  81                                 const GLchar * const *varyings,
  82                                 GLenum bufferMode);
  83
  84 extern void GLAPIENTRY
  85 _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
  86                                   GLsizei bufSize, GLsizei *length,
  87                                   GLsizei *size, GLenum *type, GLchar *name);
  88
  89
  90
  91 /*** GL_ARB_transform_feedback2 ***/
  92 extern void
  93 _mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
  94                                      GLuint name);
  95
  96 struct gl_transform_feedback_object *
  97 _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
  98
  99 extern void GLAPIENTRY
 100 _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
 101
 102 extern void GLAPIENTRY
 103 _mesa_CreateTransformFeedbacks(GLsizei n, GLuint *names);
 104
 105 extern GLboolean GLAPIENTRY
 106 _mesa_IsTransformFeedback(GLuint name);
 107
 108 void GLAPIENTRY
 109 _mesa_BindTransformFeedback_no_error(GLenum target, GLuint name);
 110
 111 extern void GLAPIENTRY
 112 _mesa_BindTransformFeedback(GLenum target, GLuint name);
 113
 114 extern void GLAPIENTRY
 115 _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
 116
 117 extern void GLAPIENTRY
 118 _mesa_PauseTransformFeedback(void);
 119
 120 extern void GLAPIENTRY
 121 _mesa_ResumeTransformFeedback(void);
 122
 123 static inline bool
 124 _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
 125 {
 126    return ctx->TransformFeedback.CurrentObject->Active &&
 127       !ctx->TransformFeedback.CurrentObject->Paused;
 128 }
 129
 130 extern bool
 131 _mesa_transform_feedback_is_using_program(struct gl_context *ctx,
 132                                           struct gl_shader_program *shProg);
 133
 134 static inline void
 135 _mesa_set_transform_feedback_binding(struct gl_context *ctx,
 136                                      struct gl_transform_feedback_object *tfObj, GLuint index,
 137                                      struct gl_buffer_object *bufObj,
 138                                      GLintptr offset, GLsizeiptr size)
 139 {
 140    _mesa_reference_buffer_object(ctx, &tfObj->Buffers[index], bufObj);
 141
 142    tfObj->BufferNames[index]   = bufObj->Name;
 143    tfObj->Offset[index]        = offset;
 144    tfObj->RequestedSize[index] = size;
 145
 146    if (bufObj != ctx->Shared->NullBufferObj)
 147       bufObj->UsageHistory |= USAGE_TRANSFORM_FEEDBACK_BUFFER;
 148 }
 149
 150 static inline void
 151 _mesa_bind_buffer_range_xfb(struct gl_context *ctx,
 152                             struct gl_transform_feedback_object *obj,
 153                             GLuint index, struct gl_buffer_object *bufObj,
 154                             GLintptr offset, GLsizeiptr size)
 155 {
 156    /* Note: no need to FLUSH_VERTICES or flag NewTransformFeedback, because
 157     * transform feedback buffers can't be changed while transform feedback is
 158     * active.
 159     */
 160
 161    /* The general binding point */
 162    _mesa_reference_buffer_object(ctx,
 163                                  &ctx->TransformFeedback.CurrentBuffer,
 164                                  bufObj);
 165
 166    /* The per-attribute binding point */
 167    _mesa_set_transform_feedback_binding(ctx, obj, index, bufObj, offset, size);
 168 }
 169
 170 /*** GL_ARB_direct_state_access ***/
 171
 172 extern void GLAPIENTRY
 173 _mesa_TransformFeedbackBufferBase(GLuint xfb, GLuint index, GLuint buffer);
 174
 175 extern void GLAPIENTRY
 176 _mesa_TransformFeedbackBufferRange(GLuint xfb, GLuint index, GLuint buffer,
 177                                    GLintptr offset, GLsizeiptr size);
 178
 179 extern void GLAPIENTRY
 180 _mesa_GetTransformFeedbackiv(GLuint xfb, GLenum pname, GLint *param);
 181
 182 extern void GLAPIENTRY
 183 _mesa_GetTransformFeedbacki_v(GLuint xfb, GLenum pname, GLuint index,
 184                               GLint *param);
 185
 186 extern void GLAPIENTRY
 187 _mesa_GetTransformFeedbacki64_v(GLuint xfb, GLenum pname, GLuint index,
 188                                 GLint64 *param);
 189
 190 #endif /* TRANSFORM_FEEDBACK_H */