src/gallium/drivers/softpipe/sp_flush.c

   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@vmware.com>
  30  */
  31
  32
  33 #include "pipe/p_defines.h"
  34 #include "pipe/p_screen.h"
  35 #include "draw/draw_context.h"
  36 #include "sp_flush.h"
  37 #include "sp_context.h"
  38 #include "sp_state.h"
  39 #include "sp_tile_cache.h"
  40 #include "sp_tex_tile_cache.h"
  41 #include "util/u_memory.h"
  42 #include "util/u_string.h"
  43
  44
  45 void
  46 softpipe_flush( struct pipe_context *pipe,
  47                 unsigned flags,
  48                 struct pipe_fence_handle **fence )
  49 {
  50    struct softpipe_context *softpipe = softpipe_context(pipe);
  51    uint i;
  52
  53    draw_flush(softpipe->draw);
  54
  55    if (flags & SP_FLUSH_TEXTURE_CACHE) {
  56       unsigned sh;
  57
  58       for (sh = 0; sh < Elements(softpipe->tex_cache); sh++) {
  59          for (i = 0; i < softpipe->num_sampler_views[sh]; i++) {
  60             sp_flush_tex_tile_cache(softpipe->tex_cache[sh][i]);
  61          }
  62       }
  63    }
  64
  65    /* If this is a swapbuffers, just flush color buffers.
  66     *
  67     * The zbuffer changes are not discarded, but held in the cache
  68     * in the hope that a later clear will wipe them out.
  69     */
  70    for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++)
  71       if (softpipe->cbuf_cache[i])
  72          sp_flush_tile_cache(softpipe->cbuf_cache[i]);
  73
  74    if (softpipe->zsbuf_cache)
  75       sp_flush_tile_cache(softpipe->zsbuf_cache);
  76
  77    softpipe->dirty_render_cache = FALSE;
  78
  79    /* Enable to dump BMPs of the color/depth buffers each frame */
  80 #if 0
  81    if (flags & PIPE_FLUSH_END_OF_FRAME) {
  82       static unsigned frame_no = 1;
  83       static char filename[256];
  84       util_snprintf(filename, sizeof(filename), "cbuf_%u.bmp", frame_no);
  85       debug_dump_surface_bmp(pipe, filename, softpipe->framebuffer.cbufs[0]);
  86       util_snprintf(filename, sizeof(filename), "zsbuf_%u.bmp", frame_no);
  87       debug_dump_surface_bmp(pipe, filename, softpipe->framebuffer.zsbuf);
  88       ++frame_no;
  89    }
  90 #endif
  91
  92    if (fence)
  93       *fence = (void*)(intptr_t)1;
  94 }
  95
  96 void
  97 softpipe_flush_wrapped(struct pipe_context *pipe,
  98                        struct pipe_fence_handle **fence,
  99                        unsigned flags)
 100 {
 101    softpipe_flush(pipe, SP_FLUSH_TEXTURE_CACHE, fence);
 102 }
 103
 104
 105 /**
 106  * Flush context if necessary.
 107  *
 108  * Returns FALSE if it would have block, but do_not_block was set, TRUE
 109  * otherwise.
 110  *
 111  * TODO: move this logic to an auxiliary library?
 112  */
 113 boolean
 114 softpipe_flush_resource(struct pipe_context *pipe,
 115                         struct pipe_resource *texture,
 116                         unsigned level,
 117                         int layer,
 118                         unsigned flush_flags,
 119                         boolean read_only,
 120                         boolean cpu_access,
 121                         boolean do_not_block)
 122 {
 123    unsigned referenced;
 124
 125    referenced = softpipe_is_resource_referenced(pipe, texture, level, layer);
 126
 127    if ((referenced & SP_REFERENCED_FOR_WRITE) ||
 128        ((referenced & SP_REFERENCED_FOR_READ) && !read_only)) {
 129
 130       /*
 131        * TODO: The semantics of these flush flags are too obtuse. They should
 132        * disappear and the pipe driver should just ensure that all visible
 133        * side-effects happen when they need to happen.
 134        */
 135       if (referenced & SP_REFERENCED_FOR_READ)
 136          flush_flags |= SP_FLUSH_TEXTURE_CACHE;
 137
 138       if (cpu_access) {
 139          /*
 140           * Flush and wait.
 141           */
 142
 143          struct pipe_fence_handle *fence = NULL;
 144
 145          if (do_not_block)
 146             return FALSE;
 147
 148          softpipe_flush(pipe, flush_flags, &fence);
 149
 150          if (fence) {
 151             /*
 152              * This is for illustrative purposes only, as softpipe does not
 153              * have fences.
 154              */
 155             pipe->screen->fence_finish(pipe->screen, fence,
 156                                        PIPE_TIMEOUT_INFINITE);
 157             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
 158          }
 159       } else {
 160          /*
 161           * Just flush.
 162           */
 163
 164          softpipe_flush(pipe, flush_flags, NULL);
 165       }
 166    }
 167
 168    return TRUE;
 169 }