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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 /* Author:
     29  *    Keith Whitwell <keithw (at) vmware.com>
     30  */
     31 
     32 
     33 #include "pipe/p_defines.h"
     34 #include "pipe/p_screen.h"
     35 #include "util/u_debug_image.h"
     36 #include "util/u_string.h"
     37 #include "draw/draw_context.h"
     38 #include "lp_flush.h"
     39 #include "lp_context.h"
     40 #include "lp_setup.h"
     41 
     42 
     43 /**
     44  * \param fence  if non-null, returns pointer to a fence which can be waited on
     45  */
     46 void
     47 llvmpipe_flush( struct pipe_context *pipe,
     48                 struct pipe_fence_handle **fence,
     49                 const char *reason)
     50 {
     51    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
     52 
     53    draw_flush(llvmpipe->draw);
     54 
     55    /* ask the setup module to flush */
     56    lp_setup_flush(llvmpipe->setup, fence, reason);
     57 
     58    /* Enable to dump BMPs of the color/depth buffers each frame */
     59    if (0) {
     60       static unsigned frame_no = 1;
     61       char filename[256];
     62       unsigned i;
     63 
     64       for (i = 0; i < llvmpipe->framebuffer.nr_cbufs; i++) {
     65          util_snprintf(filename, sizeof(filename), "cbuf%u_%u", i, frame_no);
     66          debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.cbufs[i]);
     67       }
     68 
     69       if (0) {
     70          util_snprintf(filename, sizeof(filename), "zsbuf_%u", frame_no);
     71          debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.zsbuf);
     72       }
     73 
     74       ++frame_no;
     75    }
     76 }
     77 
     78 void
     79 llvmpipe_finish( struct pipe_context *pipe,
     80                  const char *reason )
     81 {
     82    struct pipe_fence_handle *fence = NULL;
     83    llvmpipe_flush(pipe, &fence, reason);
     84    if (fence) {
     85       pipe->screen->fence_finish(pipe->screen, NULL, fence,
     86                                  PIPE_TIMEOUT_INFINITE);
     87       pipe->screen->fence_reference(pipe->screen, &fence, NULL);
     88    }
     89 }
     90 
     91 /**
     92  * Flush context if necessary.
     93  *
     94  * Returns FALSE if it would have block, but do_not_block was set, TRUE
     95  * otherwise.
     96  *
     97  * TODO: move this logic to an auxiliary library?
     98  */
     99 boolean
    100 llvmpipe_flush_resource(struct pipe_context *pipe,
    101                         struct pipe_resource *resource,
    102                         unsigned level,
    103                         boolean read_only,
    104                         boolean cpu_access,
    105                         boolean do_not_block,
    106                         const char *reason)
    107 {
    108    unsigned referenced;
    109 
    110    referenced = llvmpipe_is_resource_referenced(pipe, resource, level);
    111 
    112    if ((referenced & LP_REFERENCED_FOR_WRITE) ||
    113        ((referenced & LP_REFERENCED_FOR_READ) && !read_only)) {
    114 
    115       if (cpu_access) {
    116          /*
    117           * Flush and wait.
    118           */
    119          if (do_not_block)
    120             return FALSE;
    121 
    122          llvmpipe_finish(pipe, reason);
    123       } else {
    124          /*
    125           * Just flush.
    126           */
    127 
    128          llvmpipe_flush(pipe, NULL, reason);
    129       }
    130    }
    131 
    132    return TRUE;
    133 }
    134