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1901 serge 1 
/**************************************************************************
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 *
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 * Copyright 2010 VMware, Inc.
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 * All Rights Reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the
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 * "Software"), to deal in the Software without restriction, including
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 * without limitation the rights to use, copy, modify, merge, publish,
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 * distribute, sub license, and/or sell copies of the Software, and to
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 * permit persons to whom the Software is furnished to do so, subject to
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 * the following conditions:
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 *
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 * The above copyright notice and this permission notice (including the
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 * next paragraph) shall be included in all copies or substantial portions
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 * of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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 * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
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 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 *
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 **************************************************************************/
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/**
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 * Transform feedback functions.
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 *
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 * \author Brian Paul
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 */
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#include "main/imports.h"
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#include "main/context.h"
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#include "main/transformfeedback.h"
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#include "st_cb_xformfb.h"
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#if FEATURE_EXT_transform_feedback
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#if 0
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static struct gl_transform_feedback_object *
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st_new_transform_feedback(struct gl_context *ctx, GLuint name)
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{
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   struct gl_transform_feedback_object *obj;
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   obj = CALLOC_STRUCT(gl_transform_feedback_object);
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   if (obj) {
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      obj->Name = name;
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      obj->RefCount = 1;
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   }
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   return obj;
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}
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#endif
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#if 0
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static void
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st_delete_transform_feedback(struct gl_context *ctx,
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                             struct gl_transform_feedback_object *obj)
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{
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   GLuint i;
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   for (i = 0; i < Elements(obj->Buffers); i++) {
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      _mesa_reference_buffer_object(ctx, &obj->Buffers[i], NULL);
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   }
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   free(obj);
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}
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#endif
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static void
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st_begin_transform_feedback(struct gl_context *ctx, GLenum mode,
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                            struct gl_transform_feedback_object *obj)
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{
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   /* to-do */
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}
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static void
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st_end_transform_feedback(struct gl_context *ctx,
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                          struct gl_transform_feedback_object *obj)
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{
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   /* to-do */
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}
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static void
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st_pause_transform_feedback(struct gl_context *ctx,
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                            struct gl_transform_feedback_object *obj)
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{
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   /* to-do */
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}
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static void
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st_resume_transform_feedback(struct gl_context *ctx,
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                             struct gl_transform_feedback_object *obj)
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{
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   /* to-do */
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}
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static void
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st_draw_transform_feedback(struct gl_context *ctx, GLenum mode,
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                           struct gl_transform_feedback_object *obj)
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{
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   /* XXX to do */
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   /*
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    * Get number of vertices in obj's feedback buffer.
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    * Call ctx->Exec.DrawArrays(mode, 0, count);
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    */
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}
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void
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st_init_xformfb_functions(struct dd_function_table *functions)
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{
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   /* let core Mesa plug in its functions */
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   _mesa_init_transform_feedback_functions(functions);
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   /* then override a few: */
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   functions->BeginTransformFeedback = st_begin_transform_feedback;
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   functions->EndTransformFeedback = st_end_transform_feedback;
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   functions->PauseTransformFeedback = st_pause_transform_feedback;
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   functions->ResumeTransformFeedback = st_resume_transform_feedback;
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   functions->DrawTransformFeedback = st_draw_transform_feedback;
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}
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#endif /* FEATURE_EXT_transform_feedback */