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wined3d: Request a pixel format with alpha support in case of P8 render targets.

This commit is contained in:
Roderick Colenbrander 2008-03-30 21:36:03 +00:00 committed by Alexandre Julliard
parent bbf5dae444
commit 4120188f99
1 changed files with 7 additions and 0 deletions
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7
dlls/wined3d/context.c
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@ -237,6 +237,13 @@ WineD3DContext *CreateContext(IWineD3DDeviceImpl *This, IWineD3DSurfaceImpl *tar
PUSH2(WGL_AUX_BUFFERS_ARB, 2); PUSH2(WGL_AUX_BUFFERS_ARB, 2);
} }
/* DirectDraw supports 8bit paletted render targets and these are used by old games like Starcraft and C&C.
* Most modern hardware doesn't support 8bit natively so we perform some form of 8bit -> 32bit conversion.
* The conversion (ab)uses the alpha component for storing the palette index. For this reason we require
* a format with 8bit alpha, so request A8R8G8B8. */
if(fmt == WINED3DFMT_P8)
fmt = WINED3DFMT_A8R8G8B8;
if(!getColorBits(fmt, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits)) { if(!getColorBits(fmt, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits)) {
ERR("Unable to get color bits for format %#x!\n", target->resource.format); ERR("Unable to get color bits for format %#x!\n", target->resource.format);
return FALSE; return FALSE;