src/gallium/drivers/llvmpipe/lp_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 "lp_context.h"
  32 #include "lp_state.h"
  33 #include "lp_surface.h"
  34 #include "lp_tile_cache.h"
  35
  36 #include "draw/draw_context.h"
  37
  38 #include "util/u_format.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 llvmpipe_set_framebuffer_state(struct pipe_context *pipe,
  49                                const struct pipe_framebuffer_state *fb)
  50 {
  51    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  52    uint i;
  53
  54    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  55       /* check if changing cbuf */
  56       if (lp->framebuffer.cbufs[i] != fb->cbufs[i]) {
  57          /* flush old */
  58          lp_tile_cache_map_transfers(lp->cbuf_cache[i]);
  59          lp_flush_tile_cache(lp->cbuf_cache[i]);
  60
  61          /* assign new */
  62          pipe_surface_reference(&lp->framebuffer.cbufs[i], fb->cbufs[i]);
  63
  64          /* update cache */
  65          lp_tile_cache_set_surface(lp->cbuf_cache[i], fb->cbufs[i]);
  66       }
  67    }
  68
  69    lp->framebuffer.nr_cbufs = fb->nr_cbufs;
  70
  71    /* zbuf changing? */
  72    if (lp->framebuffer.zsbuf != fb->zsbuf) {
  73
  74       if(lp->zsbuf_transfer) {
  75          struct pipe_screen *screen = pipe->screen;
  76
  77          if(lp->zsbuf_map) {
  78             screen->transfer_unmap(screen, lp->zsbuf_transfer);
  79             lp->zsbuf_map = NULL;
  80          }
  81
  82          screen->tex_transfer_destroy(lp->zsbuf_transfer);
  83          lp->zsbuf_transfer = NULL;
  84       }
  85
  86       /* assign new */
  87       pipe_surface_reference(&lp->framebuffer.zsbuf, fb->zsbuf);
  88
  89       /* Tell draw module how deep the Z/depth buffer is */
  90       if (lp->framebuffer.zsbuf) {
  91          int depth_bits;
  92          double mrd;
  93          depth_bits = util_format_get_component_bits(lp->framebuffer.zsbuf->format,
  94                                                      UTIL_FORMAT_COLORSPACE_ZS,
  95                                                      0);
  96          if (depth_bits > 16) {
  97             mrd = 0.0000001;
  98          }
  99          else {
 100             mrd = 0.00002;
 101          }
 102          draw_set_mrd(lp->draw, mrd);
 103       }
 104    }
 105
 106    lp->framebuffer.width = fb->width;
 107    lp->framebuffer.height = fb->height;
 108
 109    lp->dirty |= LP_NEW_FRAMEBUFFER;
 110 }