X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fpixelformat.h;h=13bc03a8c059325d7272120f5a486b58e7e5d01e;hb=e1be82a4dfce8d90358c506f65be09da4dc9d5ec;hp=c180451403dc2af7e9f8c640a7c8384b04eb85e7;hpb=190a7e11237351f6b730c28f7b16f183e8adc69c;p=libs%2Fgl.git

diff --git a/source/core/pixelformat.h b/source/core/pixelformat.h
index c1804514..13bc03a8 100644
--- a/source/core/pixelformat.h
+++ b/source/core/pixelformat.h
@@ -37,6 +37,18 @@ enum PixelComponents
 	LUMINANCE_ALPHA = 0x42
 };
 
+/**
+Describes a mapping from one set of components to another.
+*/
+enum ComponentSwizzle
+{
+	NO_SWIZZLE,
+	R_TO_LUMINANCE,
+	RG_TO_LUMINANCE_ALPHA,
+	RGB_TO_BGR,
+	RGBA_TO_RGB
+};
+
 /**
 Identifies a pixel format, with components and type.
 
@@ -89,6 +101,10 @@ void operator>>(const LexicalConverter &, PixelFormat &);
 PixelComponents components_from_graphics(Graphics::PixelFormat);
 PixelFormat pixelformat_from_image(const Graphics::Image &, bool = false);
 
+ComponentSwizzle get_required_swizzle(PixelComponents);
+PixelComponents swizzle_components(PixelComponents, ComponentSwizzle);
+PixelComponents unswizzle_components(PixelComponents, ComponentSwizzle);
+
 PixelFormat make_pixelformat(PixelComponents, DataType, bool = false);
 inline PixelComponents get_components(PixelFormat f) { return static_cast<PixelComponents>(f&0xFF); }
 inline unsigned get_component_count(PixelComponents c) { return c&7; }