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