d3dx9: Handle pixel formats larger than 32 bits in surface loading / filtering functions.

dlls/d3dx9_36/d3dx9_36_private.h

@@ -98,6 +98,7 @@ HRESULT load_volume_texture_from_dds(IDirect3DVolumeTexture9 *volume_texture, co
     const PALETTEENTRY *palette, DWORD filter, DWORD color_key, const D3DXIMAGE_INFO *src_info) DECLSPEC_HIDDEN;
 
 unsigned short float_32_to_16(const float in) DECLSPEC_HIDDEN;
+float float_16_to_32(const unsigned short in) DECLSPEC_HIDDEN;
 
 /* debug helpers */
 const char *debug_d3dxparameter_class(D3DXPARAMETER_CLASS c) DECLSPEC_HIDDEN;

dlls/d3dx9_36/math.c

@@ -2226,7 +2226,7 @@ D3DXFLOAT16 *WINAPI D3DXFloat32To16Array(D3DXFLOAT16 *pout, const FLOAT *pin, UI
 
 /* Native d3dx9's D3DXFloat16to32Array lacks support for NaN and Inf. Specifically, e = 16 is treated as a
  * regular number - e.g., 0x7fff is converted to 131008.0 and 0xffff to -131008.0. */
-static inline float float_16_to_32(const unsigned short in)
+float float_16_to_32(const unsigned short in)
 {
     const unsigned short s = (in & 0x8000);
     const unsigned short e = (in & 0x7C00) >> 10;