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      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 (at) tungstengraphics.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 
     43 
     44 void
     45 softpipe_flush( struct pipe_context *pipe,
     46                 unsigned flags,
     47                 struct pipe_fence_handle **fence )
     48 {
     49    struct softpipe_context *softpipe = softpipe_context(pipe);
     50    uint i;
     51 
     52    draw_flush(softpipe->draw);
     53 
     54    if (flags & SP_FLUSH_TEXTURE_CACHE) {
     55       unsigned sh;
     56 
     57       for (sh = 0; sh < Elements(softpipe->tex_cache); sh++) {
     58          for (i = 0; i < softpipe->num_sampler_views[sh]; i++) {
     59             sp_flush_tex_tile_cache(softpipe->tex_cache[sh][i]);
     60          }
     61       }
     62    }
     63 
     64    /* If this is a swapbuffers, just flush color buffers.
     65     *
     66     * The zbuffer changes are not discarded, but held in the cache
     67     * in the hope that a later clear will wipe them out.
     68     */
     69    for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++)
     70       if (softpipe->cbuf_cache[i])
     71          sp_flush_tile_cache(softpipe->cbuf_cache[i]);
     72 
     73    if (softpipe->zsbuf_cache)
     74       sp_flush_tile_cache(softpipe->zsbuf_cache);
     75 
     76    softpipe->dirty_render_cache = FALSE;
     77 
     78    /* Need this call for hardware buffers before swapbuffers.
     79     *
     80     * there should probably be another/different flush-type function
     81     * that's called before swapbuffers because we don't always want
     82     * to unmap surfaces when flushing.
     83     */
     84    softpipe_unmap_transfers(softpipe);
     85 
     86    /* Enable to dump BMPs of the color/depth buffers each frame */
     87 #if 0
     88    if(flags & PIPE_FLUSH_FRAME) {
     89       static unsigned frame_no = 1;
     90       static char filename[256];
     91       util_snprintf(filename, sizeof(filename), "cbuf_%u.bmp", frame_no);
     92       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.cbufs[0]);
     93       util_snprintf(filename, sizeof(filename), "zsbuf_%u.bmp", frame_no);
     94       debug_dump_surface_bmp(softpipe, filename, softpipe->framebuffer.zsbuf);
     95       ++frame_no;
     96    }
     97 #endif
     98 
     99    if (fence)
    100       *fence = (void*)(intptr_t)1;
    101 }
    102 
    103 void
    104 softpipe_flush_wrapped( struct pipe_context *pipe,
    105                         struct pipe_fence_handle **fence )
    106 {
    107    softpipe_flush(pipe, SP_FLUSH_TEXTURE_CACHE, fence);
    108 }
    109 
    110 
    111 /**
    112  * Flush context if necessary.
    113  *
    114  * Returns FALSE if it would have block, but do_not_block was set, TRUE
    115  * otherwise.
    116  *
    117  * TODO: move this logic to an auxiliary library?
    118  */
    119 boolean
    120 softpipe_flush_resource(struct pipe_context *pipe,
    121                         struct pipe_resource *texture,
    122                         unsigned level,
    123                         int layer,
    124                         unsigned flush_flags,
    125                         boolean read_only,
    126                         boolean cpu_access,
    127                         boolean do_not_block)
    128 {
    129    unsigned referenced;
    130 
    131    referenced = softpipe_is_resource_referenced(pipe, texture, level, layer);
    132 
    133    if ((referenced & SP_REFERENCED_FOR_WRITE) ||
    134        ((referenced & SP_REFERENCED_FOR_READ) && !read_only)) {
    135 
    136       /*
    137        * TODO: The semantics of these flush flags are too obtuse. They should
    138        * disappear and the pipe driver should just ensure that all visible
    139        * side-effects happen when they need to happen.
    140        */
    141       if (referenced & SP_REFERENCED_FOR_READ)
    142          flush_flags |= SP_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          softpipe_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,
    162                                        PIPE_TIMEOUT_INFINITE);
    163             pipe->screen->fence_reference(pipe->screen, &fence, NULL);
    164          }
    165       } else {
    166          /*
    167           * Just flush.
    168           */
    169 
    170          softpipe_flush(pipe, flush_flags, NULL);
    171       }
    172    }
    173 
    174    return TRUE;
    175 }
    176