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      1 /**************************************************************************
      2  *
      3  * Copyright 2007 VMware, Inc.
      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 VMWARE 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 <keithw (at) 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    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 }
    105