src/gallium/drivers/softpipe/sp_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 "sp_context.h"
  32 #include "sp_state.h"
  33 #include "sp_tile_cache.h"
  34
  35 #include "draw/draw_context.h"
  36
  37 #include "util/u_format.h"
  38
  39
  40 /**
  41  * XXX this might get moved someday
  42  * Set the framebuffer surface info: color buffers, zbuffer, stencil buffer.
  43  * Here, we flush the old surfaces and update the tile cache to point to the new
  44  * surfaces.
  45  */
  46 void
  47 softpipe_set_framebuffer_state(struct pipe_context *pipe,
  48                                const struct pipe_framebuffer_state *fb)
  49 {
  50    struct softpipe_context *sp = softpipe_context(pipe);
  51    uint i;
  52
  53    draw_flush(sp->draw);
  54
  55    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  56       /* check if changing cbuf */
  57       if (sp->framebuffer.cbufs[i] != fb->cbufs[i]) {
  58          /* flush old */
  59          sp_flush_tile_cache(sp->cbuf_cache[i]);
  60
  61          /* assign new */
  62          pipe_surface_reference(&sp->framebuffer.cbufs[i], fb->cbufs[i]);
  63
  64          /* update cache */
  65          sp_tile_cache_set_surface(sp->cbuf_cache[i], fb->cbufs[i]);
  66       }
  67    }
  68
  69    sp->framebuffer.nr_cbufs = fb->nr_cbufs;
  70
  71    /* zbuf changing? */
  72    if (sp->framebuffer.zsbuf != fb->zsbuf) {
  73       /* flush old */
  74       sp_flush_tile_cache(sp->zsbuf_cache);
  75
  76       /* assign new */
  77       pipe_surface_reference(&sp->framebuffer.zsbuf, fb->zsbuf);
  78
  79       /* update cache */
  80       sp_tile_cache_set_surface(sp->zsbuf_cache, fb->zsbuf);
  81
  82       /* Tell draw module how deep the Z/depth buffer is */
  83       if (sp->framebuffer.zsbuf) {
  84          int depth_bits;
  85          double mrd;
  86          depth_bits = util_format_get_component_bits(sp->framebuffer.zsbuf->format,
  87                                                      UTIL_FORMAT_COLORSPACE_ZS,
  88                                                      0);
  89          if (depth_bits > 16) {
  90             mrd = 0.0000001;
  91          }
  92          else {
  93             mrd = 0.00002;
  94          }
  95          draw_set_mrd(sp->draw, mrd);
  96       }
  97    }
  98
  99    sp->framebuffer.width = fb->width;
 100    sp->framebuffer.height = fb->height;
 101
 102    sp->dirty |= SP_NEW_FRAMEBUFFER;
 103 }