src/gallium/drivers/llvmpipe/lp_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 "util/u_string.h"
  35 #include "draw/draw_context.h"
  36 #include "lp_flush.h"
  37 #include "lp_context.h"
  38 #include "lp_setup.h"
  39
  40
  41 /**
  42  * \param flags  bitmask of PIPE_FLUSH_x flags
  43  * \param fence  if non-null, returns pointer to a fence which can be waited on
  44  */
  45 void
  46 llvmpipe_flush( struct pipe_context *pipe,
  47                 unsigned flags,
  48                 struct pipe_fence_handle **fence )
  49 {
  50    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  51
  52    draw_flush(llvmpipe->draw);
  53
  54    /* ask the setup module to flush */
  55    lp_setup_flush(llvmpipe->setup, flags, fence);
  56
  57    /* Enable to dump BMPs of the color/depth buffers each frame */
  58    if (0) {
  59       if (flags & PIPE_FLUSH_FRAME) {
  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[0]);
  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
  79
  80 /**
  81  * Flush context if necessary.
  82  *
  83  * Returns FALSE if it would have block, but do_not_block was set, TRUE
  84  * otherwise.
  85  *
  86  * TODO: move this logic to an auxiliary library?
  87  */
  88 boolean
  89 llvmpipe_flush_resource(struct pipe_context *pipe,
  90                         struct pipe_resource *resource,
  91                         unsigned face,
  92                         unsigned level,
  93                         unsigned flush_flags,
  94                         boolean read_only,
  95                         boolean cpu_access,
  96                         boolean do_not_block)
  97 {
  98    unsigned referenced;
  99
 100    referenced = pipe->is_resource_referenced(pipe, resource, face, level);
 101
 102    if ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
 103        ((referenced & PIPE_REFERENCED_FOR_READ) && !read_only)) {
 104
 105       if (cpu_access) {
 106          /*
 107           * Flush and wait.
 108           */
 109
 110          struct pipe_fence_handle *fence = NULL;
 111
 112          if (do_not_block)
 113             return FALSE;
 114
 115          /*
 116           * Do the unswizzling in parallel.
 117           *
 118           * XXX: Don't abuse the PIPE_FLUSH_FRAME flag for this.
 119           */
 120          flush_flags |= PIPE_FLUSH_FRAME;
 121
 122          llvmpipe_flush(pipe, flush_flags, &fence);
 123
 124          if (fence) {
 125             pipe->screen->fence_finish(pipe->screen, fence, 0);
 126             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
 127          }
 128       } else {
 129          /*
 130           * Just flush.
 131           */
 132
 133          llvmpipe_flush(pipe, flush_flags, NULL);
 134       }
 135    }
 136
 137    return TRUE;
 138 }