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