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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 (at) 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       /* check if changing cbuf */
     58       if (sp->framebuffer.cbufs[i] != fb->cbufs[i]) {
     59          /* flush old */
     60          sp_flush_tile_cache(sp->cbuf_cache[i]);
     61 
     62          /* assign new */
     63          pipe_surface_reference(&sp->framebuffer.cbufs[i], fb->cbufs[i]);
     64 
     65          /* update cache */
     66          sp_tile_cache_set_surface(sp->cbuf_cache[i], fb->cbufs[i]);
     67       }
     68    }
     69 
     70    sp->framebuffer.nr_cbufs = fb->nr_cbufs;
     71 
     72    /* zbuf changing? */
     73    if (sp->framebuffer.zsbuf != fb->zsbuf) {
     74       /* flush old */
     75       sp_flush_tile_cache(sp->zsbuf_cache);
     76 
     77       /* assign new */
     78       pipe_surface_reference(&sp->framebuffer.zsbuf, fb->zsbuf);
     79 
     80       /* update cache */
     81       sp_tile_cache_set_surface(sp->zsbuf_cache, fb->zsbuf);
     82 
     83       /* Tell draw module how deep the Z/depth buffer is */
     84       if (sp->framebuffer.zsbuf) {
     85          int depth_bits;
     86          double mrd;
     87          depth_bits = util_format_get_component_bits(sp->framebuffer.zsbuf->format,
     88                                                      UTIL_FORMAT_COLORSPACE_ZS,
     89                                                      0);
     90          if (depth_bits > 16) {
     91             mrd = 0.0000001;
     92          }
     93          else {
     94             mrd = 0.00002;
     95          }
     96          draw_set_mrd(sp->draw, mrd);
     97       }
     98    }
     99 
    100    sp->framebuffer.width = fb->width;
    101    sp->framebuffer.height = fb->height;
    102 
    103    sp->dirty |= SP_NEW_FRAMEBUFFER;
    104 }
    105