Matteo et al, there is some code in dlls/d3dx9_36/surface.c which GCC struggles with (in the sense of warning about it), and so do I, so I am wondering whether you can have a look?
Specifically, in point_filter_simple_data we have: DWORD val = 0, pixel; /* extract source color components */ if(srcformat->type == FORMAT_ARGB) { pixel = dword_from_bytes(srcptr, srcformat->bytes_per_pixel); get_relevant_argb_components(&conv_info, pixel, channels); } So, pixel is uninitialized, except when we have FORMAT_ARGB. However, directly below we then have /* recombine the components */ if(destformat->type == FORMAT_ARGB) val = make_argb_color(&conv_info, channels); if(colorkey) { get_relevant_argb_components(&ck_conv_info, pixel, channels); where pixel is passed to get_relevant_argb_components. This is guarded by colorkey, a parameter to this function, so indeed I can see pixel being unused here. (I'd naively propose a patch like the one below; this may not be sufficient though.) Gerald diff --git a/dlls/d3dx9_36/surface.c b/dlls/d3dx9_36/surface.c index a3e6e68..cc36818 100644 --- a/dlls/d3dx9_36/surface.c +++ b/dlls/d3dx9_36/surface.c @@ -701,7 +701,7 @@ static void copy_simple_data(CONST BYTE *src, UINT srcpitch, POINT srcsize, DWORD val = 0; for(x = 0;x < minwidth;x++) { - DWORD pixel; + DWORD pixel = 0xFFFFFFFF; /* extract source color components */ if(srcformat->type == FORMAT_ARGB) { @@ -768,7 +768,7 @@ static void point_filter_simple_data(CONST BYTE *src, UINT srcpitch, POINT srcsi for(x = 0;x < destsize.x;x++) { const BYTE *srcptr = bufptr + (x * srcsize.x / destsize.x) * srcformat->bytes_per_pixel; - DWORD val = 0, pixel; + DWORD val = 0, pixel = 0xFFFFFFFF; /* extract source color components */ if(srcformat->type == FORMAT_ARGB) {