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
  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 /* Authors:  Keith Whitwell <keith@tungstengraphics.com>
  29  */
  30
  31 #include "lp_context.h"
  32 #include "lp_state.h"
  33 #include "lp_surface.h"
  34 #include "lp_setup.h"
  35
  36 #include "draw/draw_context.h"
  37
  38
  39 /**
  40  * Set the framebuffer surface info: color buffers, zbuffer, stencil buffer.
  41  */
  42 void
  43 llvmpipe_set_framebuffer_state(struct pipe_context *pipe,
  44                                const struct pipe_framebuffer_state *fb)
  45 {
  46    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  47    uint i;
  48    boolean dirty = FALSE;
  49
  50    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  51       if (lp->framebuffer.cbufs[i] != fb->cbufs[i]) {
  52          pipe_surface_reference(&lp->framebuffer.cbufs[i], fb->cbufs[i]);
  53          dirty = TRUE;
  54       }
  55    }
  56
  57    if (lp->framebuffer.nr_cbufs != fb->nr_cbufs) {
  58       dirty = TRUE;
  59       lp->framebuffer.nr_cbufs = fb->nr_cbufs;
  60    }
  61
  62    /* zbuf changing? */
  63    if (lp->framebuffer.zsbuf != fb->zsbuf) {
  64       dirty = TRUE;
  65
  66       /* assign new */
  67       pipe_surface_reference(&lp->framebuffer.zsbuf, fb->zsbuf);
  68
  69       /* Tell draw module how deep the Z/depth buffer is */
  70       if (lp->framebuffer.zsbuf) {
  71          int depth_bits;
  72          double mrd;
  73          depth_bits = pf_get_component_bits(lp->framebuffer.zsbuf->format,
  74                                             PIPE_FORMAT_COMP_Z);
  75          if (depth_bits > 16) {
  76             mrd = 0.0000001;
  77          }
  78          else {
  79             mrd = 0.00002;
  80          }
  81          draw_set_mrd(lp->draw, mrd);
  82       }
  83    }
  84
  85    if (dirty) {
  86       lp_setup_bind_framebuffer( lp->setup,
  87                                  fb->cbufs[0],
  88                                  fb->zsbuf );
  89
  90       lp->dirty |= LP_NEW_FRAMEBUFFER;
  91    }
  92 }