src/mesa/state_tracker/st_cb_queryobj.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * 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
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 /**
  30  * glBegin/EndQuery interface to pipe
  31  *
  32  * \author Brian Paul
  33  */
  34
  35
  36 #include "main/imports.h"
  37 #include "main/context.h"
  38 #include "main/image.h"
  39
  40 #include "pipe/p_context.h"
  41 #include "pipe/p_defines.h"
  42 #include "st_context.h"
  43 #include "st_cb_queryobj.h"
  44 #include "st_public.h"
  45
  46
  47 /**
  48  * Do glReadPixels by getting rows from the framebuffer surface with
  49  * get_tile().  Convert to requested format/type with Mesa image routines.
  50  * Image transfer ops are done in software too.
  51  */
  52 static void
  53 st_BeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
  54 {
  55    struct pipe_context *pipe = ctx->st->pipe;
  56    if (target == GL_SAMPLES_PASSED_ARB) {
  57       pipe->reset_occlusion_counter(pipe);
  58    }
  59 }
  60
  61
  62 static void
  63 st_EndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
  64 {
  65    struct pipe_context *pipe = ctx->st->pipe;
  66    if (target == GL_SAMPLES_PASSED_ARB) {
  67       q->Result = pipe->get_occlusion_counter(pipe);
  68    }
  69 }
  70
  71
  72 void st_init_query_functions(struct dd_function_table *functions)
  73 {
  74    functions->BeginQuery = st_BeginQuery;
  75    functions->EndQuery = st_EndQuery;
  76 }