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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 "pipe/p_state.h"
     32 #include "util/u_inlines.h"
     33 #include "util/u_framebuffer.h"
     34 #include "util/u_surface.h"
     35 #include "lp_context.h"
     36 #include "lp_scene.h"
     37 #include "lp_state.h"
     38 #include "lp_setup.h"
     39 
     40 #include "draw/draw_context.h"
     41 
     42 #include "util/u_format.h"
     43 
     44 
     45 /**
     46  * Set the framebuffer surface info: color buffers, zbuffer, stencil buffer.
     47  */
     48 void
     49 llvmpipe_set_framebuffer_state(struct pipe_context *pipe,
     50                                const struct pipe_framebuffer_state *fb)
     51 {
     52    struct llvmpipe_context *lp = llvmpipe_context(pipe);
     53 
     54    boolean changed = !util_framebuffer_state_equal(&lp->framebuffer, fb);
     55 
     56    assert(fb->width <= LP_MAX_WIDTH);
     57    assert(fb->height <= LP_MAX_HEIGHT);
     58 
     59    if (changed) {
     60 
     61       util_copy_framebuffer_state(&lp->framebuffer, fb);
     62 
     63       if (LP_PERF & PERF_NO_DEPTH) {
     64 	 pipe_surface_reference(&lp->framebuffer.zsbuf, NULL);
     65       }
     66 
     67       /* Tell draw module how deep the Z/depth buffer is */
     68       if (lp->framebuffer.zsbuf) {
     69          int depth_bits;
     70          double mrd;
     71          depth_bits = util_format_get_component_bits(lp->framebuffer.zsbuf->format,
     72                                                      UTIL_FORMAT_COLORSPACE_ZS,
     73                                                      0);
     74          if (depth_bits > 16) {
     75             mrd = 0.0000001;
     76          }
     77          else {
     78             mrd = 0.00002;
     79          }
     80          lp->mrd = mrd;
     81          draw_set_mrd(lp->draw, mrd);
     82       }
     83 
     84       lp_setup_bind_framebuffer( lp->setup, &lp->framebuffer );
     85 
     86       lp->dirty |= LP_NEW_FRAMEBUFFER;
     87    }
     88 }
     89