src/gallium/drivers/llvmpipe/lp_state_surface.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   4  * All Rights Reserved.
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  11  * permit persons to whom the Software is furnished to do so, subject to
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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  26  **************************************************************************/
  27
  28 /* Authors:  Keith Whitwell <keithw@vmware.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/format/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    unsigned i;
  56
  57    assert(fb->width <= LP_MAX_WIDTH);
  58    assert(fb->height <= LP_MAX_HEIGHT);
  59
  60    if (changed) {
  61       /*
  62        * If no depth buffer is bound, send the utility function the default
  63        * format for no bound depth (PIPE_FORMAT_NONE).
  64        */
  65       enum pipe_format depth_format = fb->zsbuf ?
  66          fb->zsbuf->format : PIPE_FORMAT_NONE;
  67       const struct util_format_description *depth_desc =
  68          util_format_description(depth_format);
  69
  70       if (lp->framebuffer.zsbuf && lp->framebuffer.zsbuf->context != pipe) {
  71          debug_printf("Illegal setting of fb state with zsbuf created in "
  72                        "another context\n");
  73       }
  74       for (i = 0; i < fb->nr_cbufs; i++) {
  75          if (lp->framebuffer.cbufs[i] &&
  76              lp->framebuffer.cbufs[i]->context != pipe) {
  77             debug_printf("Illegal setting of fb state with cbuf %d created in "
  78                           "another context\n", i);
  79          }
  80       }
  81
  82       util_copy_framebuffer_state(&lp->framebuffer, fb);
  83
  84       if (LP_PERF & PERF_NO_DEPTH) {
  85          pipe_surface_reference(&lp->framebuffer.zsbuf, NULL);
  86       }
  87
  88       /*
  89        * Calculate the floating point depth sense and Minimum Resolvable Depth
  90        * value for the llvmpipe module. This is separate from the draw module.
  91        */
  92       lp->floating_point_depth =
  93          (util_get_depth_format_type(depth_desc) == UTIL_FORMAT_TYPE_FLOAT);
  94
  95       lp->mrd = util_get_depth_format_mrd(depth_desc);
  96
  97       /* Tell the draw module how deep the Z/depth buffer is. */
  98       draw_set_zs_format(lp->draw, depth_format);
  99
 100       lp_setup_bind_framebuffer( lp->setup, &lp->framebuffer );
 101
 102       lp->dirty |= LP_NEW_FRAMEBUFFER;
 103    }
 104 }