src/gallium/drivers/llvmpipe/lp_state_surface.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
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* Authors:  Keith Whitwell <keith@tungstengraphics.com>
  29  */
  30
  31 #include "pipe/p_state.h"
  32 #include "util/u_surface.h"
  33 #include "lp_context.h"
  34 #include "lp_state.h"
  35 #include "lp_surface.h"
  36 #include "lp_setup.h"
  37
  38 #include "draw/draw_context.h"
  39
  40
  41 /**
  42  * Set the framebuffer surface info: color buffers, zbuffer, stencil buffer.
  43  */
  44 void
  45 llvmpipe_set_framebuffer_state(struct pipe_context *pipe,
  46                                const struct pipe_framebuffer_state *fb)
  47 {
  48    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  49
  50    boolean changed = !util_framebuffer_state_equal(&lp->framebuffer, fb);
  51
  52    if (changed) {
  53
  54       util_copy_framebuffer_state(&lp->framebuffer, fb);
  55
  56       /* Tell draw module how deep the Z/depth buffer is */
  57       if (lp->framebuffer.zsbuf) {
  58          int depth_bits;
  59          double mrd;
  60          depth_bits = pf_get_component_bits(lp->framebuffer.zsbuf->format,
  61                                             PIPE_FORMAT_COMP_Z);
  62          if (depth_bits > 16) {
  63             mrd = 0.0000001;
  64          }
  65          else {
  66             mrd = 0.00002;
  67          }
  68          draw_set_mrd(lp->draw, mrd);
  69       }
  70
  71       lp_setup_bind_framebuffer( lp->setup, &lp->framebuffer );
  72
  73       lp->dirty |= LP_NEW_FRAMEBUFFER;
  74    }
  75 }