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.

wined3d: Use GL_DEPTH_COMPONENT as internal format for depth_blt_texture.
01e668b0 · Henri Verbeet · Alexandre Julliard · 95bd0ec6 · 01e668b0
Commit 01e668b0 authored Jun 07, 2011 by Henri Verbeet Committed by Alexandre Julliard Jun 07, 2011
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surface.c dlls/wined3d/surface.c +8 -1

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--- 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);