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| 1901 | serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
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| 4 | * All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the |
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| 8 | * "Software"), to deal in the Software without restriction, including |
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| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 11 | * permit persons to whom the Software is furnished to do so, subject to |
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| 12 | * the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice (including the |
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| 15 | * next paragraph) shall be included in all copies or substantial portions |
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| 16 | * of the Software. |
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| 17 | * |
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| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 21 | * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | * |
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| 26 | **************************************************************************/ |
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| 27 | |||
| 28 | /* |
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| 29 | * Authors: |
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| 30 | * Keith Whitwell |
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| 31 | * Brian Paul |
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| 32 | */ |
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| 33 | |||
| 34 | #include "main/glheader.h" |
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| 35 | #include "main/macros.h" |
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| 36 | #include "main/context.h" |
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| 37 | #include "st_context.h" |
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| 38 | #include "st_cb_bitmap.h" |
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| 39 | #include "st_cb_flush.h" |
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| 40 | #include "st_cb_clear.h" |
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| 41 | #include "st_cb_fbo.h" |
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| 42 | #include "st_manager.h" |
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| 43 | #include "pipe/p_context.h" |
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| 44 | #include "pipe/p_defines.h" |
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| 45 | #include "pipe/p_screen.h" |
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| 46 | #include "util/u_gen_mipmap.h" |
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| 47 | #include "util/u_blit.h" |
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| 48 | |||
| 49 | |||
| 50 | /** Check if we have a front color buffer and if it's been drawn to. */ |
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| 51 | static INLINE GLboolean |
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| 52 | is_front_buffer_dirty(struct st_context *st) |
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| 53 | { |
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| 54 | struct gl_framebuffer *fb = st->ctx->DrawBuffer; |
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| 55 | struct st_renderbuffer *strb |
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| 56 | = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer); |
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| 57 | return strb && strb->defined; |
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| 58 | } |
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| 59 | |||
| 60 | |||
| 61 | /** |
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| 62 | * Tell the screen to display the front color buffer on-screen. |
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| 63 | */ |
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| 64 | static void |
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| 65 | display_front_buffer(struct st_context *st) |
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| 66 | { |
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| 67 | struct gl_framebuffer *fb = st->ctx->DrawBuffer; |
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| 68 | struct st_renderbuffer *strb |
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| 69 | = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer); |
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| 70 | |||
| 71 | if (strb) { |
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| 72 | /* Hook for copying "fake" frontbuffer if necessary: |
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| 73 | */ |
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| 74 | st_manager_flush_frontbuffer(st); |
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| 75 | } |
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| 76 | } |
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| 77 | |||
| 78 | |||
| 79 | void st_flush( struct st_context *st, uint pipeFlushFlags, |
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| 80 | struct pipe_fence_handle **fence ) |
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| 81 | { |
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| 82 | FLUSH_CURRENT(st->ctx, 0); |
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| 83 | |||
| 84 | /* Release any vertex buffers that might potentially be accessed in |
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| 85 | * successive frames: |
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| 86 | */ |
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| 87 | st_flush_bitmap(st); |
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| 88 | st_flush_clear(st); |
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| 89 | util_blit_flush(st->blit); |
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| 90 | util_gen_mipmap_flush(st->gen_mipmap); |
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| 91 | |||
| 92 | st->pipe->flush( st->pipe, pipeFlushFlags, fence ); |
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| 93 | } |
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| 94 | |||
| 95 | |||
| 96 | /** |
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| 97 | * Flush, and wait for completion. |
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| 98 | */ |
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| 99 | void st_finish( struct st_context *st ) |
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| 100 | { |
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| 101 | struct pipe_fence_handle *fence = NULL; |
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| 102 | |||
| 103 | st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence); |
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| 104 | |||
| 105 | if(fence) { |
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| 106 | st->pipe->screen->fence_finish(st->pipe->screen, fence, 0); |
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| 107 | st->pipe->screen->fence_reference(st->pipe->screen, &fence, NULL); |
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| 108 | } |
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| 109 | } |
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| 110 | |||
| 111 | |||
| 112 | |||
| 113 | /** |
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| 114 | * Called via ctx->Driver.Flush() |
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| 115 | */ |
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| 116 | static void st_glFlush(struct gl_context *ctx) |
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| 117 | { |
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| 118 | struct st_context *st = st_context(ctx); |
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| 119 | |||
| 120 | /* Don't call st_finish() here. It is not the state tracker's |
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| 121 | * responsibilty to inject sleeps in the hope of avoiding buffer |
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| 122 | * synchronization issues. Calling finish() here will just hide |
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| 123 | * problems that need to be fixed elsewhere. |
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| 124 | */ |
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| 125 | st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL); |
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| 126 | |||
| 127 | if (is_front_buffer_dirty(st)) { |
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| 128 | display_front_buffer(st); |
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| 129 | } |
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| 130 | } |
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| 131 | |||
| 132 | |||
| 133 | /** |
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| 134 | * Called via ctx->Driver.Finish() |
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| 135 | */ |
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| 136 | static void st_glFinish(struct gl_context *ctx) |
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| 137 | { |
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| 138 | struct st_context *st = st_context(ctx); |
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| 139 | |||
| 140 | st_finish(st); |
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| 141 | |||
| 142 | if (is_front_buffer_dirty(st)) { |
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| 143 | display_front_buffer(st); |
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| 144 | } |
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| 145 | } |
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| 146 | |||
| 147 | |||
| 148 | void st_init_flush_functions(struct dd_function_table *functions) |
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| 149 | { |
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| 150 | functions->Flush = st_glFlush; |
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| 151 | functions->Finish = st_glFinish; |
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| 152 | |||
| 153 | /* Windows opengl32.dll calls glFinish prior to every swapbuffers. |
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| 154 | * This is unnecessary and degrades performance. Luckily we have some |
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| 155 | * scope to work around this, as the externally-visible behaviour of |
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| 156 | * Finish() is identical to Flush() in all cases - no differences in |
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| 157 | * rendering or ReadPixels are visible if we opt not to wait here. |
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| 158 | * |
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| 159 | * Only set this up on windows to avoid suprise elsewhere. |
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| 160 | */ |
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| 161 | #ifdef PIPE_OS_WINDOWS |
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| 162 | functions->Finish = st_glFlush; |
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| 163 | #endif |
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| 164 | } |