Henri Verbeet : wined3d: Use GL_DEPTH_COMPONENT as internal format for depth_blt_texture.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 01e668b00747be4a359e7a74f17bb40e2490d006
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=01e668b00747be4a359e7a74f1...

Author: Henri Verbeet <hverbeet(a)codeweavers.com>
Date:   Tue Jun  7 11:06:26 2011 +0200

wined3d: Use GL_DEPTH_COMPONENT as internal format for depth_blt_texture.

This also changes the texture level to always be zero while we're at it. In
practice depth/stencil textures should rarely have multiple levels, if ever,
but only 0 makes sense here.

---

 dlls/wined3d/surface.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/dlls/wined3d/surface.c b/dlls/wined3d/surface.c
index c5c526b..ad217fc 100644
--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -5707,7 +5707,14 @@ void surface_load_ds_location(struct wined3d_surface *surface, struct wined3d_co
             bind_target = GL_TEXTURE_2D;
         }
         glBindTexture(bind_target, device->depth_blt_texture);
-        glCopyTexImage2D(bind_target, surface->texture_level, surface->resource.format->glInternal, 0, 0, w, h, 0);
+        /* We use GL_DEPTH_COMPONENT instead of the surface's specific
+         * internal format, because the internal format might include stencil
+         * data. In principle we should copy stencil data as well, but unless
+         * the driver supports stencil export it's hard to do, and doesn't
+         * seem to be needed in practice. If the hardware doesn't support
+         * writing stencil data, the glCopyTexImage2D() call might trigger
+         * software fallbacks. */
+        glCopyTexImage2D(bind_target, 0, GL_DEPTH_COMPONENT, 0, 0, w, h, 0);
         glTexParameteri(bind_target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
         glTexParameteri(bind_target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
         glTexParameteri(bind_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);