Stefan Dösinger : wined3d: Use CTXUSAGE_RESOURCELOAD for fb->texture reads.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 1c7f39ed1e4a03aac2dd434ea88892234899c4f6
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=1c7f39ed1e4a03aac2dd434ea88892234899c4f6

Author: Stefan Dösinger <stefan at codeweavers.com>
Date:   Tue Jun 17 01:41:02 2008 +0200

wined3d: Use CTXUSAGE_RESOURCELOAD for fb->texture reads.

There is no need for _BLIT usage. RESOURCELOAD should be faster.

---

 dlls/wined3d/surface.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/dlls/wined3d/surface.c b/dlls/wined3d/surface.c
index 0171e31..1db152e 100644
--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -886,12 +886,11 @@ static void read_from_framebuffer_texture(IWineD3DSurfaceImpl *This)
     d3dfmt_get_conv(This, TRUE /* We need color keying */, TRUE /* We will use textures */, &format, &internal, &type, &convert, &bpp, This->srgb);
 
     IWineD3DSurface_GetContainer((IWineD3DSurface *) This, &IID_IWineD3DSwapChain, (void **)&swapchain);
-    /* Activate the surface. Set it up for blitting now, although not necessarily needed for LockRect.
-     * Certain graphics drivers seem to dislike some enabled states when reading from opengl, the blitting usage
-     * should help here. Furthermore unlockrect will need the context set up for blitting. The context manager will find
-     * context->last_was_blit set on the unlock.
+    /* Activate the surface to read from. In some situations it isn't the currently active target(e.g. backbuffer
+     * locking during offscreen rendering). RESOURCELOAD is ok because glCopyTexSubImage2D isn't affected by any
+     * states in the stateblock, and no driver was found yet that had bugs in that regard.
      */
-    ActivateContext(device, (IWineD3DSurface *) This, CTXUSAGE_BLIT);
+    ActivateContext(device, (IWineD3DSurface *) This, CTXUSAGE_RESOURCELOAD);
     surface_bind_and_dirtify(This);
     ENTER_GL();