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  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. #include "util/u_inlines.h"
  39.  
  40.  
  41. /**
  42.  * XXX this might get moved someday
  43.  * Set the framebuffer surface info: color buffers, zbuffer, stencil buffer.
  44.  * Here, we flush the old surfaces and update the tile cache to point to the new
  45.  * surfaces.
  46.  */
  47. void
  48. softpipe_set_framebuffer_state(struct pipe_context *pipe,
  49.                                const struct pipe_framebuffer_state *fb)
  50. {
  51.    struct softpipe_context *sp = softpipe_context(pipe);
  52.    uint i;
  53.  
  54.    draw_flush(sp->draw);
  55.  
  56.    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  57.       struct pipe_surface *cb = i < fb->nr_cbufs ? fb->cbufs[i] : NULL;
  58.  
  59.       /* check if changing cbuf */
  60.       if (sp->framebuffer.cbufs[i] != cb) {
  61.          /* flush old */
  62.          sp_flush_tile_cache(sp->cbuf_cache[i]);
  63.  
  64.          /* assign new */
  65.          pipe_surface_reference(&sp->framebuffer.cbufs[i], cb);
  66.  
  67.          /* update cache */
  68.          sp_tile_cache_set_surface(sp->cbuf_cache[i], cb);
  69.       }
  70.    }
  71.  
  72.    sp->framebuffer.nr_cbufs = fb->nr_cbufs;
  73.  
  74.    /* zbuf changing? */
  75.    if (sp->framebuffer.zsbuf != fb->zsbuf) {
  76.       /* flush old */
  77.       sp_flush_tile_cache(sp->zsbuf_cache);
  78.  
  79.       /* assign new */
  80.       pipe_surface_reference(&sp->framebuffer.zsbuf, fb->zsbuf);
  81.  
  82.       /* update cache */
  83.       sp_tile_cache_set_surface(sp->zsbuf_cache, fb->zsbuf);
  84.  
  85.       /* Tell draw module how deep the Z/depth buffer is */
  86.       if (sp->framebuffer.zsbuf) {
  87.          int depth_bits;
  88.          double mrd;
  89.          depth_bits = util_format_get_component_bits(sp->framebuffer.zsbuf->format,
  90.                                                      UTIL_FORMAT_COLORSPACE_ZS,
  91.                                                      0);
  92.          if (depth_bits > 16) {
  93.             mrd = 0.0000001;
  94.          }
  95.          else {
  96.             mrd = 0.00002;
  97.          }
  98.          draw_set_mrd(sp->draw, mrd);
  99.       }
  100.    }
  101.  
  102.    sp->framebuffer.width = fb->width;
  103.    sp->framebuffer.height = fb->height;
  104.  
  105.    sp->dirty |= SP_NEW_FRAMEBUFFER;
  106. }
  107.