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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  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/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        * If no depth buffer is bound, send the utility function the default
  62        * format for no bound depth (PIPE_FORMAT_NONE).
  63        */
  64       enum pipe_format depth_format = fb->zsbuf ?
  65          fb->zsbuf->format : PIPE_FORMAT_NONE;
  66       const struct util_format_description *depth_desc =
  67          util_format_description(depth_format);
  68
  69       util_copy_framebuffer_state(&lp->framebuffer, fb);
  70
  71       if (LP_PERF & PERF_NO_DEPTH) {
  72          pipe_surface_reference(&lp->framebuffer.zsbuf, NULL);
  73       }
  74
  75       /*
  76        * Calculate the floating point depth sense and Minimum Resolvable Depth
  77        * value for the llvmpipe module. This is separate from the draw module.
  78        */
  79       lp->floating_point_depth =
  80          (util_get_depth_format_type(depth_desc) == UTIL_FORMAT_TYPE_FLOAT);
  81
  82       lp->mrd = util_get_depth_format_mrd(depth_desc);
  83
  84       /* Tell the draw module how deep the Z/depth buffer is. */
  85       draw_set_zs_format(lp->draw, depth_format);
  86
  87       lp_setup_bind_framebuffer( lp->setup, &lp->framebuffer );
  88
  89       lp->dirty |= LP_NEW_FRAMEBUFFER;
  90    }
  91 }