[PATCH 2/4] wined3d: Allow decompression blits on system memory resources in arbfp_blit_supported().

[Henri Verbeet]

In general we prefer to do blits between system memory resources on the CPU,
but decompressing DXTn formats in particular is problematic.

Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
---
 dlls/wined3d/arb_program_shader.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dlls/wined3d/arb_program_shader.c b/dlls/wined3d/arb_program_shader.c
index f9906b2..85ed462 100644
--- a/dlls/wined3d/arb_program_shader.c
+++ b/dlls/wined3d/arb_program_shader.c
@@ -7713,6 +7713,7 @@ static BOOL arbfp_blit_supported(const struct wined3d_gl_info *gl_info,
         const RECT *dst_rect, DWORD dst_usage, enum wined3d_pool dst_pool, const struct wined3d_format *dst_format)
 {
     enum complex_fixup src_fixup;
+    BOOL decompress;
 
     if (!gl_info->supported[ARB_FRAGMENT_PROGRAM])
         return FALSE;
@@ -7735,7 +7736,9 @@ static BOOL arbfp_blit_supported(const struct wined3d_gl_info *gl_info,
             return FALSE;
     }
 
-    if (src_pool == WINED3D_POOL_SYSTEM_MEM || dst_pool == WINED3D_POOL_SYSTEM_MEM)
+    decompress = src_format && (src_format->flags[WINED3D_GL_RES_TYPE_TEX_2D] & WINED3DFMT_FLAG_COMPRESSED)
+            && !(dst_format->flags[WINED3D_GL_RES_TYPE_TEX_2D] & WINED3DFMT_FLAG_COMPRESSED);
+    if (!decompress && (dst_pool == WINED3D_POOL_SYSTEM_MEM || src_pool == WINED3D_POOL_SYSTEM_MEM))
         return FALSE;
 
     src_fixup = get_complex_fixup(src_format->color_fixup);
-- 
2.1.4