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 fench 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    if (fence) {
  55       /* if we're going to flush the setup/rasterization modules, emit
  56        * a fence.
  57        * XXX this (and the code below) may need fine tuning...
  58        */
  59       *fence = lp_setup_fence( llvmpipe->setup );
  60    }
  61
  62    /* ask the setup module to flush */
  63    lp_setup_flush(llvmpipe->setup, flags);
  64
  65    /* Enable to dump BMPs of the color/depth buffers each frame */
  66    if (0) {
  67       if (flags & PIPE_FLUSH_FRAME) {
  68          static unsigned frame_no = 1;
  69          char filename[256];
  70          unsigned i;
  71
  72          for (i = 0; i < llvmpipe->framebuffer.nr_cbufs; i++) {
  73             util_snprintf(filename, sizeof(filename), "cbuf%u_%u", i, frame_no);
  74             debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.cbufs[0]);
  75          }
  76
  77          if (0) {
  78             util_snprintf(filename, sizeof(filename), "zsbuf_%u", frame_no);
  79             debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.zsbuf);
  80          }
  81
  82          ++frame_no;
  83       }
  84    }
  85 }
  86
  87
  88 /**
  89  * Flush context if necessary.
  90  *
  91  * Returns FALSE if it would have block, but do_not_block was set, TRUE
  92  * otherwise.
  93  *
  94  * TODO: move this logic to an auxiliary library?
  95  */
  96 boolean
  97 llvmpipe_flush_resource(struct pipe_context *pipe,
  98                         struct pipe_resource *resource,
  99                         unsigned face,
 100                         unsigned level,
 101                         unsigned flush_flags,
 102                         boolean read_only,
 103                         boolean cpu_access,
 104                         boolean do_not_block)
 105 {
 106    unsigned referenced;
 107
 108    referenced = pipe->is_resource_referenced(pipe, resource, face, level);
 109
 110    if ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
 111        ((referenced & PIPE_REFERENCED_FOR_READ) && !read_only)) {
 112
 113       if (cpu_access) {
 114          /*
 115           * Flush and wait.
 116           */
 117
 118          struct pipe_fence_handle *fence = NULL;
 119
 120          if (do_not_block)
 121             return FALSE;
 122
 123          /*
 124           * Do the unswizzling in parallel.
 125           *
 126           * XXX: Don't abuse the PIPE_FLUSH_FRAME flag for this.
 127           */
 128          flush_flags |= PIPE_FLUSH_FRAME;
 129
 130          llvmpipe_flush(pipe, flush_flags, &fence);
 131
 132          if (fence) {
 133             pipe->screen->fence_finish(pipe->screen, fence, 0);
 134             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
 135          }
 136       } else {
 137          /*
 138           * Just flush.
 139           */
 140
 141          llvmpipe_flush(pipe, flush_flags, NULL);
 142       }
 143    }
 144
 145    return TRUE;
 146 }