lp_flush.c revision 287c94ea4987033f9c99a2f91c5750c9083504ca 
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 "lp_flush.h"
36#include "lp_context.h"
37#include "lp_setup.h"
38
39
40void
41llvmpipe_flush( struct pipe_context *pipe,
42		unsigned flags,
43                struct pipe_fence_handle **fence )
44{
45   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
46
47   draw_flush(llvmpipe->draw);
48
49   if (fence) {
50      if ((flags & (PIPE_FLUSH_SWAPBUFFERS |
51                    PIPE_FLUSH_RENDER_CACHE))) {
52         /* if we're going to flush the setup/rasterization modules, emit
53          * a fence.
54          * XXX this (and the code below) may need fine tuning...
55          */
56         *fence = lp_setup_fence( llvmpipe->setup );
57      }
58      else {
59         *fence = NULL;
60      }
61   }
62
63   /* XXX the lp_setup_flush(flags) param is not a bool, and it's ignored
64    * at this time!
65    */
66   if (flags & PIPE_FLUSH_SWAPBUFFERS) {
67      lp_setup_flush( llvmpipe->setup, FALSE );
68   }
69   else if (flags & PIPE_FLUSH_RENDER_CACHE) {
70      lp_setup_flush( llvmpipe->setup, TRUE );
71   }
72
73   /* Enable to dump BMPs of the color/depth buffers each frame */
74#if 0
75   if (flags & PIPE_FLUSH_FRAME) {
76      static unsigned frame_no = 1;
77      char filename[256];
78      unsigned i;
79
80      for (i = 0; i < llvmpipe->framebuffer.nr_cbufs; i++) {
81	 util_snprintf(filename, sizeof(filename), "cbuf%u_%u", i, frame_no);
82         debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.cbufs[0]);
83      }
84
85      if (0) {
86         util_snprintf(filename, sizeof(filename), "zsbuf_%u", frame_no);
87         debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.zsbuf);
88      }
89
90      ++frame_no;
91   }
92#endif
93}
94
95
96/**
97 * Flush context if necessary.
98 *
99 * TODO: move this logic to an auxiliary library?
100 *
101 * FIXME: We must implement DISCARD/DONTBLOCK/UNSYNCHRONIZED/etc for
102 * textures to avoid blocking.
103 */
104boolean
105llvmpipe_flush_texture(struct pipe_context *pipe,
106                       struct pipe_resource *texture,
107                       unsigned face,
108                       unsigned level,
109                       unsigned flush_flags,
110                       boolean read_only,
111                       boolean cpu_access,
112                       boolean do_not_flush)
113{
114   unsigned referenced;
115
116   referenced = pipe->is_resource_referenced(pipe, texture, face, level);
117
118   if ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
119       ((referenced & PIPE_REFERENCED_FOR_READ) && !read_only)) {
120
121      if (do_not_flush)
122         return FALSE;
123
124      /*
125       * TODO: The semantics of these flush flags are too obtuse. They should
126       * disappear and the pipe driver should just ensure that all visible
127       * side-effects happen when they need to happen.
128       */
129      if (referenced & PIPE_REFERENCED_FOR_WRITE)
130         flush_flags |= PIPE_FLUSH_RENDER_CACHE;
131
132      if (referenced & PIPE_REFERENCED_FOR_READ)
133         flush_flags |= PIPE_FLUSH_TEXTURE_CACHE;
134
135      if (cpu_access) {
136         /*
137          * Flush and wait.
138          */
139
140         struct pipe_fence_handle *fence = NULL;
141
142         pipe->flush(pipe, flush_flags, &fence);
143
144         if (fence) {
145            pipe->screen->fence_finish(pipe->screen, fence, 0);
146            pipe->screen->fence_reference(pipe->screen, &fence, NULL);
147         }
148      } else {
149         /*
150          * Just flush.
151          */
152
153         pipe->flush(pipe, flush_flags, NULL);
154      }
155   }
156
157   return TRUE;
158}
159