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
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  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 "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       util_copy_framebuffer_state(&lp->framebuffer, fb);
  61
  62       if (LP_PERF & PERF_NO_DEPTH) {
  63          pipe_surface_reference(&lp->framebuffer.zsbuf, NULL);
  64       }
  65
  66       /* Tell draw module how deep the Z/depth buffer is.
  67        *
  68        * If no depth buffer is bound, send the utility function the default
  69        * format for no bound depth (PIPE_FORMAT_NONE).
  70        *
  71        * FIXME: mrd constant isn't right should use a value derived from
  72        * current primitive not a constant (for float depth buffers)
  73        */
  74       lp->mrd = util_get_depth_format_mrd((lp->framebuffer.zsbuf) ?
  75                   lp->framebuffer.zsbuf->format : PIPE_FORMAT_NONE);
  76
  77       draw_set_mrd(lp->draw, lp->mrd);
  78
  79       lp_setup_bind_framebuffer( lp->setup, &lp->framebuffer );
  80
  81       lp->dirty |= LP_NEW_FRAMEBUFFER;
  82    }
  83 }