diff options
Diffstat (limited to 'src/mesa/state_tracker/st_cb_flush.c')
-rw-r--r-- | src/mesa/state_tracker/st_cb_flush.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_flush.c b/src/mesa/state_tracker/st_cb_flush.c new file mode 100644 index 0000000000..1329f807bc --- /dev/null +++ b/src/mesa/state_tracker/st_cb_flush.c @@ -0,0 +1,176 @@ +/************************************************************************** + * + * 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_public.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) +{ + if (st->frontbuffer_status == FRONT_STATUS_DIRTY) { + return GL_TRUE; + } + else { + GLframebuffer *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) +{ + GLframebuffer *fb = st->ctx->DrawBuffer; + struct st_renderbuffer *strb + = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer); + + if (strb) { + struct pipe_surface *front_surf = strb->surface; + + /* Hook for copying "fake" frontbuffer if necessary: + */ + st->pipe->screen->flush_frontbuffer( st->pipe->screen, front_surf, + st->pipe->priv ); + + /* + st->frontbuffer_status = FRONT_STATUS_UNDEFINED; + */ + } +} + + +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(GLcontext *ctx) +{ + struct st_context *st = ctx->st; + + /* 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(GLcontext *ctx) +{ + struct st_context *st = ctx->st; + + 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 +} |