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      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 #include "main/imports.h"
     30 #include "main/readpix.h"
     31 
     32 #include "st_atom.h"
     33 #include "st_context.h"
     34 #include "st_cb_bitmap.h"
     35 #include "st_cb_readpixels.h"
     36 
     37 
     38 /**
     39  * The only special thing we need to do for the state tracker's
     40  * glReadPixels is to validate state (to be sure we have up-to-date
     41  * framebuffer surfaces) and flush the bitmap cache prior to reading.
     42  */
     43 static void
     44 st_readpixels(struct gl_context *ctx, GLint x, GLint y,
     45               GLsizei width, GLsizei height,
     46               GLenum format, GLenum type,
     47               const struct gl_pixelstore_attrib *pack,
     48               GLvoid *dest)
     49 {
     50    struct st_context *st = st_context(ctx);
     51 
     52    st_validate_state(st);
     53    st_flush_bitmap_cache(st);
     54    _mesa_readpixels(ctx, x, y, width, height, format, type, pack, dest);
     55 }
     56 
     57 
     58 void st_init_readpixels_functions(struct dd_function_table *functions)
     59 {
     60    functions->ReadPixels = st_readpixels;
     61 }
     62