Merge branch '7.8' into master

[mesa.git] / src / mesa / state_tracker / st_cb_flush.c

diff --git a/src/mesa/state_tracker/st_cb_flush.c b/src/mesa/state_tracker/st_cb_flush.c
index 7d7d3823c99f8ccd551e0894fd6136eea091a904..30e7afcf2a317e3ff32043eaca82560cb4d7b38e 100644 (file)
--- a/src/mesa/state_tracker/st_cb_flush.c
+++ b/src/mesa/state_tracker/st_cb_flush.c
@@ -40,6 +40,7 @@
 #include "st_cb_clear.h"
 #include "st_cb_fbo.h"
 #include "st_public.h"
+#include "st_manager.h"
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_screen.h"
@@ -47,10 +48,19 @@
 #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)
 {
-   return st->frontbuffer_status == FRONT_STATUS_DIRTY;
+   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;
+   }
 }
 
 
@@ -65,12 +75,9 @@ display_front_buffer(struct st_context *st)
       = 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_manager_flush_frontbuffer(st);
 
       /*
         st->frontbuffer_status = FRONT_STATUS_UNDEFINED;
@@ -82,7 +89,7 @@ display_front_buffer(struct st_context *st)
 void st_flush( struct st_context *st, uint pipeFlushFlags,
                struct pipe_fence_handle **fence )
 {
-   FLUSH_VERTICES(st->ctx, 0);
+   FLUSH_CURRENT(st->ctx, 0);
 
    /* Release any vertex buffers that might potentially be accessed in
     * successive frames:
@@ -152,4 +159,16 @@ 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
 }