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 #include "pipe/p_inlines.h"
  31
  32 #include "sp_context.h"
  33 #include "sp_state.h"
  34 #include "sp_surface.h"
  35 #include "sp_tile_cache.h"
  36
  37 #include "draw/draw_context.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    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  54       /* check if changing cbuf */
  55       if (sp->framebuffer.cbufs[i] != fb->cbufs[i]) {
  56          /* flush old */
  57          sp_flush_tile_cache(sp, sp->cbuf_cache[i]);
  58
  59          /* assign new */
  60          sp->framebuffer.cbufs[i] = fb->cbufs[i];
  61
  62          /* update cache */
  63          sp_tile_cache_set_surface(sp->cbuf_cache[i], fb->cbufs[i]);
  64       }
  65    }
  66
  67    sp->framebuffer.nr_cbufs = fb->nr_cbufs;
  68
  69    /* zbuf changing? */
  70    if (sp->framebuffer.zsbuf != fb->zsbuf) {
  71       /* flush old */
  72       sp_flush_tile_cache(sp, sp->zsbuf_cache);
  73
  74       /* assign new */
  75       sp->framebuffer.zsbuf = fb->zsbuf;
  76
  77       /* update cache */
  78       sp_tile_cache_set_surface(sp->zsbuf_cache, fb->zsbuf);
  79    }
  80
  81 #if 0
  82    /* XXX combined depth/stencil here */
  83
  84    /* sbuf changing? */
  85    if (sp->framebuffer.sbuf != fb->sbuf) {
  86       /* flush old */
  87       sp_flush_tile_cache(sp, sp->sbuf_cache_sep);
  88
  89       /* assign new */
  90       sp->framebuffer.sbuf = fb->sbuf;
  91
  92       /* update cache */
  93       if (fb->sbuf != fb->zbuf) {
  94          /* separate stencil buf */
  95          sp->sbuf_cache = sp->sbuf_cache_sep;
  96          sp_tile_cache_set_surface(sp->sbuf_cache, fb->sbuf);
  97       }
  98       else {
  99          /* combined depth/stencil */
 100          sp->sbuf_cache = sp->zbuf_cache;
 101          sp_tile_cache_set_surface(sp->sbuf_cache, fb->sbuf);
 102       }
 103    }
 104 #endif
 105
 106    /* Tell draw module how deep the Z/depth buffer is */
 107    {
 108       int depth_bits;
 109       double mrd;
 110       if (sp->framebuffer.zsbuf) {
 111          depth_bits = pf_get_component_bits(sp->framebuffer.zsbuf->format,
 112                                             PIPE_FORMAT_COMP_Z);
 113       }
 114       else {
 115          depth_bits = 0;
 116       }
 117       if (depth_bits > 16) {
 118          mrd = 0.0000001;
 119       }
 120       else {
 121          mrd = 0.00002;
 122       }
 123       draw_set_mrd(sp->draw, mrd);
 124    }
 125
 126    sp->framebuffer.width = fb->width;
 127    sp->framebuffer.height = fb->height;
 128
 129    sp->dirty |= SP_NEW_FRAMEBUFFER;
 130 }