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| /************************************************************************** |
| * |
| * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /* |
| * Authors: |
| * Keith Whitwell <keith@tungstengraphics.com> |
| * Brian Paul |
| */ |
| |
| #include "main/glheader.h" |
| #include "main/macros.h" |
| #include "main/context.h" |
| #include "st_context.h" |
| #include "st_cb_bitmap.h" |
| #include "st_cb_flush.h" |
| #include "st_cb_clear.h" |
| #include "st_cb_fbo.h" |
| #include "st_manager.h" |
| #include "pipe/p_context.h" |
| #include "pipe/p_defines.h" |
| #include "pipe/p_screen.h" |
| #include "util/u_gen_mipmap.h" |
| #include "util/u_blit.h" |
| |
| |
| /** Check if we have a front color buffer and if it's been drawn to. */ |
| static INLINE GLboolean |
| is_front_buffer_dirty(struct st_context *st) |
| { |
| struct gl_framebuffer *fb = st->ctx->DrawBuffer; |
| struct st_renderbuffer *strb |
| = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer); |
| return strb && strb->defined; |
| } |
| |
| |
| /** |
| * Tell the screen to display the front color buffer on-screen. |
| */ |
| static void |
| display_front_buffer(struct st_context *st) |
| { |
| struct gl_framebuffer *fb = st->ctx->DrawBuffer; |
| struct st_renderbuffer *strb |
| = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer); |
| |
| if (strb) { |
| /* Hook for copying "fake" frontbuffer if necessary: |
| */ |
| st_manager_flush_frontbuffer(st); |
| } |
| } |
| |
| |
| void st_flush( struct st_context *st, uint pipeFlushFlags, |
| struct pipe_fence_handle **fence ) |
| { |
| FLUSH_CURRENT(st->ctx, 0); |
| |
| /* Release any vertex buffers that might potentially be accessed in |
| * successive frames: |
| */ |
| st_flush_bitmap(st); |
| st_flush_clear(st); |
| util_blit_flush(st->blit); |
| util_gen_mipmap_flush(st->gen_mipmap); |
| |
| st->pipe->flush( st->pipe, pipeFlushFlags, fence ); |
| } |
| |
| |
| /** |
| * Flush, and wait for completion. |
| */ |
| void st_finish( struct st_context *st ) |
| { |
| struct pipe_fence_handle *fence = NULL; |
| |
| st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence); |
| |
| if(fence) { |
| st->pipe->screen->fence_finish(st->pipe->screen, fence, 0); |
| st->pipe->screen->fence_reference(st->pipe->screen, &fence, NULL); |
| } |
| } |
| |
| |
| |
| /** |
| * Called via ctx->Driver.Flush() |
| */ |
| static void st_glFlush(struct gl_context *ctx) |
| { |
| struct st_context *st = st_context(ctx); |
| |
| /* Don't call st_finish() here. It is not the state tracker's |
| * responsibilty to inject sleeps in the hope of avoiding buffer |
| * synchronization issues. Calling finish() here will just hide |
| * problems that need to be fixed elsewhere. |
| */ |
| st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, NULL); |
| |
| if (is_front_buffer_dirty(st)) { |
| display_front_buffer(st); |
| } |
| } |
| |
| |
| /** |
| * Called via ctx->Driver.Finish() |
| */ |
| static void st_glFinish(struct gl_context *ctx) |
| { |
| struct st_context *st = st_context(ctx); |
| |
| st_finish(st); |
| |
| if (is_front_buffer_dirty(st)) { |
| display_front_buffer(st); |
| } |
| } |
| |
| |
| void st_init_flush_functions(struct dd_function_table *functions) |
| { |
| functions->Flush = st_glFlush; |
| functions->Finish = st_glFinish; |
| |
| /* Windows opengl32.dll calls glFinish prior to every swapbuffers. |
| * This is unnecessary and degrades performance. Luckily we have some |
| * scope to work around this, as the externally-visible behaviour of |
| * Finish() is identical to Flush() in all cases - no differences in |
| * rendering or ReadPixels are visible if we opt not to wait here. |
| * |
| * Only set this up on windows to avoid suprise elsewhere. |
| */ |
| #ifdef PIPE_OS_WINDOWS |
| functions->Finish = st_glFlush; |
| #endif |
| } |