src/mesa/state_tracker/st_cb_xformfb.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 VMware, Inc.
   4  * All Rights Reserved.
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  11  * permit persons to whom the Software is furnished to do so, subject to
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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  26  **************************************************************************/
  27
  28
  29 /**
  30  * Transform feedback functions.
  31  *
  32  * \author Brian Paul
  33  */
  34
  35
  36 #include "main/imports.h"
  37 #include "main/context.h"
  38 #include "main/mfeatures.h"
  39 #include "main/transformfeedback.h"
  40
  41 #include "st_cb_xformfb.h"
  42
  43
  44 #if FEATURE_EXT_transform_feedback
  45
  46 #if 0
  47 static struct gl_transform_feedback_object *
  48 st_new_transform_feedback(struct gl_context *ctx, GLuint name)
  49 {
  50    struct gl_transform_feedback_object *obj;
  51    obj = CALLOC_STRUCT(gl_transform_feedback_object);
  52    if (obj) {
  53       obj->Name = name;
  54       obj->RefCount = 1;
  55    }
  56    return obj;
  57 }
  58 #endif
  59
  60 #if 0
  61 static void
  62 st_delete_transform_feedback(struct gl_context *ctx,
  63                              struct gl_transform_feedback_object *obj)
  64 {
  65    GLuint i;
  66
  67    for (i = 0; i < Elements(obj->Buffers); i++) {
  68       _mesa_reference_buffer_object(ctx, &obj->Buffers[i], NULL);
  69    }
  70
  71    free(obj);
  72 }
  73 #endif
  74
  75
  76 static void
  77 st_begin_transform_feedback(struct gl_context *ctx, GLenum mode,
  78                             struct gl_transform_feedback_object *obj)
  79 {
  80    /* to-do */
  81 }
  82
  83
  84 static void
  85 st_end_transform_feedback(struct gl_context *ctx,
  86                           struct gl_transform_feedback_object *obj)
  87 {
  88    /* to-do */
  89 }
  90
  91
  92 static void
  93 st_pause_transform_feedback(struct gl_context *ctx,
  94                             struct gl_transform_feedback_object *obj)
  95 {
  96    /* to-do */
  97 }
  98
  99
 100 static void
 101 st_resume_transform_feedback(struct gl_context *ctx,
 102                              struct gl_transform_feedback_object *obj)
 103 {
 104    /* to-do */
 105 }
 106
 107
 108 static void
 109 st_draw_transform_feedback(struct gl_context *ctx, GLenum mode,
 110                            struct gl_transform_feedback_object *obj)
 111 {
 112    /* XXX to do */
 113    /*
 114     * Get number of vertices in obj's feedback buffer.
 115     * Call ctx->Exec.DrawArrays(mode, 0, count);
 116     */
 117 }
 118
 119
 120 void
 121 st_init_xformfb_functions(struct dd_function_table *functions)
 122 {
 123    /* let core Mesa plug in its functions */
 124    _mesa_init_transform_feedback_functions(functions);
 125
 126    /* then override a few: */
 127    functions->BeginTransformFeedback = st_begin_transform_feedback;
 128    functions->EndTransformFeedback = st_end_transform_feedback;
 129    functions->PauseTransformFeedback = st_pause_transform_feedback;
 130    functions->ResumeTransformFeedback = st_resume_transform_feedback;
 131    functions->DrawTransformFeedback = st_draw_transform_feedback;
 132 }
 133
 134 #endif /* FEATURE_EXT_transform_feedback */