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
  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 llvmpipe_set_framebuffer_state(struct pipe_context *pipe,
  47                                const struct pipe_framebuffer_state *fb)
  48 {
  49    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  50    uint i;
  51
  52    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
  53       /* check if changing cbuf */
  54       if (lp->framebuffer.cbufs[i] != fb->cbufs[i]) {
  55          /* flush old */
  56          lp_flush_tile_cache(lp->cbuf_cache[i]);
  57
  58          /* assign new */
  59          lp->framebuffer.cbufs[i] = fb->cbufs[i];
  60
  61          /* update cache */
  62          lp_tile_cache_set_surface(lp->cbuf_cache[i], fb->cbufs[i]);
  63       }
  64    }
  65
  66    lp->framebuffer.nr_cbufs = fb->nr_cbufs;
  67
  68    /* zbuf changing? */
  69    if (lp->framebuffer.zsbuf != fb->zsbuf) {
  70
  71       if(lp->zsbuf_transfer) {
  72          struct pipe_screen *screen = pipe->screen;
  73
  74          if(lp->zsbuf_map) {
  75             screen->transfer_unmap(screen, lp->zsbuf_transfer);
  76             lp->zsbuf_map = NULL;
  77          }
  78
  79          screen->tex_transfer_destroy(lp->zsbuf_transfer);
  80          lp->zsbuf_transfer = NULL;
  81       }
  82
  83       /* assign new */
  84       lp->framebuffer.zsbuf = fb->zsbuf;
  85
  86       /* Tell draw module how deep the Z/depth buffer is */
  87       if (lp->framebuffer.zsbuf) {
  88          int depth_bits;
  89          double mrd;
  90          depth_bits = pf_get_component_bits(lp->framebuffer.zsbuf->format,
  91                                             PIPE_FORMAT_COMP_Z);
  92          if (depth_bits > 16) {
  93             mrd = 0.0000001;
  94          }
  95          else {
  96             mrd = 0.00002;
  97          }
  98          draw_set_mrd(lp->draw, mrd);
  99       }
 100    }
 101
 102    lp->framebuffer.width = fb->width;
 103    lp->framebuffer.height = fb->height;
 104
 105    lp->dirty |= LP_NEW_FRAMEBUFFER;
 106 }