src/gallium/drivers/softpipe/sp_flush.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 <keith@tungstengraphics.com>
  30  */
  31
  32
  33 #include "pipe/p_defines.h"
  34 #include "draw/draw_context.h"
  35 #include "sp_flush.h"
  36 #include "sp_context.h"
  37 #include "sp_state.h"
  38 #include "sp_tile_cache.h"
  39 #include "sp_tex_tile_cache.h"
  40
  41
  42 void
  43 softpipe_flush( struct pipe_context *pipe,
  44                 unsigned flags,
  45                 struct pipe_fence_handle **fence )
  46 {
  47    struct softpipe_context *softpipe = softpipe_context(pipe);
  48    uint i;
  49
  50    draw_flush(softpipe->draw);
  51
  52    if (flags & PIPE_FLUSH_TEXTURE_CACHE) {
  53       for (i = 0; i < softpipe->num_sampler_views; i++) {
  54          sp_flush_tex_tile_cache(softpipe->tex_cache[i]);
  55       }
  56       for (i = 0; i < softpipe->num_vertex_sampler_views; i++) {
  57          sp_flush_tex_tile_cache(softpipe->vertex_tex_cache[i]);
  58       }
  59    }
  60
  61    if (flags & PIPE_FLUSH_SWAPBUFFERS) {
  62       /* If this is a swapbuffers, just flush color buffers.
  63        *
  64        * The zbuffer changes are not discarded, but held in the cache
  65        * in the hope that a later clear will wipe them out.
  66        */
  67       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++)
  68          if (softpipe->cbuf_cache[i])
  69             sp_flush_tile_cache(softpipe->cbuf_cache[i]);
  70
  71       /* Need this call for hardware buffers before swapbuffers.
  72        *
  73        * there should probably be another/different flush-type function
  74        * that's called before swapbuffers because we don't always want
  75        * to unmap surfaces when flushing.
  76        */
  77       softpipe_unmap_transfers(softpipe);
  78    }
  79    else if (flags & PIPE_FLUSH_RENDER_CACHE) {
  80       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++)
  81          if (softpipe->cbuf_cache[i])
  82             sp_flush_tile_cache(softpipe->cbuf_cache[i]);
  83
  84       if (softpipe->zsbuf_cache)
  85          sp_flush_tile_cache(softpipe->zsbuf_cache);
  86
  87       softpipe->dirty_render_cache = FALSE;
  88    }
  89
  90    /* Enable to dump BMPs of the color/depth buffers each frame */
  91 #if 0
  92    if(flags & PIPE_FLUSH_FRAME) {
  93       static unsigned frame_no = 1;
  94       static char filename[256];
  95       util_snprintf(filename, sizeof(filename), "cbuf_%u.bmp", frame_no);
  96       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.cbufs[0]);
  97       util_snprintf(filename, sizeof(filename), "zsbuf_%u.bmp", frame_no);
  98       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.zsbuf);
  99       ++frame_no;
 100    }
 101 #endif
 102
 103    if (fence)
 104       *fence = NULL;
 105 }
 106
 107
 108 /**
 109  * Flush context if necessary.
 110  *
 111  * Returns FALSE if it would have block, but do_not_block was set, TRUE
 112  * otherwise.
 113  *
 114  * TODO: move this logic to an auxiliary library?
 115  */
 116 boolean
 117 softpipe_flush_resource(struct pipe_context *pipe,
 118                         struct pipe_resource *texture,
 119                         unsigned face,
 120                         unsigned level,
 121                         unsigned flush_flags,
 122                         boolean read_only,
 123                         boolean cpu_access,
 124                         boolean do_not_block)
 125 {
 126    unsigned referenced;
 127
 128    referenced = pipe->is_resource_referenced(pipe, texture, face, level);
 129
 130    if ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
 131        ((referenced & PIPE_REFERENCED_FOR_READ) && !read_only)) {
 132
 133       /*
 134        * TODO: The semantics of these flush flags are too obtuse. They should
 135        * disappear and the pipe driver should just ensure that all visible
 136        * side-effects happen when they need to happen.
 137        */
 138       if (referenced & PIPE_REFERENCED_FOR_WRITE)
 139          flush_flags |= PIPE_FLUSH_RENDER_CACHE;
 140
 141       if (referenced & PIPE_REFERENCED_FOR_READ)
 142          flush_flags |= PIPE_FLUSH_TEXTURE_CACHE;
 143
 144       if (cpu_access) {
 145          /*
 146           * Flush and wait.
 147           */
 148
 149          struct pipe_fence_handle *fence = NULL;
 150
 151          if (do_not_block)
 152             return FALSE;
 153
 154          pipe->flush(pipe, flush_flags, &fence);
 155
 156          if (fence) {
 157             /*
 158              * This is for illustrative purposes only, as softpipe does not
 159              * have fences.
 160              */
 161             pipe->screen->fence_finish(pipe->screen, fence, 0);
 162             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
 163          }
 164       } else {
 165          /*
 166           * Just flush.
 167           */
 168
 169          pipe->flush(pipe, flush_flags, NULL);
 170       }
 171    }
 172
 173    return TRUE;
 174 }