From fe9f60e2196d2762c874740fff35dc0ed07ea5ad Mon Sep 17 00:00:00 2001
From: Max Horn
Date: Mon, 17 Apr 2006 10:41:18 +0000
Subject: Add color conversion functions based on ColorMasks, to demonstrate
 how this would work

svn-id: r21967
---
 graphics/colormasks.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'graphics/colormasks.h')

diff --git a/graphics/colormasks.h b/graphics/colormasks.h
index 422af23d85..2e151fc67b 100644
--- a/graphics/colormasks.h
+++ b/graphics/colormasks.h
@@ -217,5 +217,34 @@ struct ColorMasks<8888> {
 	};
 };
 
+template<class T>
+uint32 RGBToColor(uint8 r, uint8 g, uint8 b) {
+	return ((r << T::kRedShift) & T::kRedMask) |
+	       ((g << T::kGreenShift) & T::kGreenMask) |
+	       ((b << T::kBlueShift) & T::kBlueMask);
+}
+
+template<class T>
+uint32 ARGBToColor(uint8 a, uint8 r, uint8 g, uint8 b) {
+	return ((a << T::kAlphaShift) & T::kAlphaMask) |
+	       ((r << T::kRedShift) & T::kRedMask) |
+	       ((g << T::kGreenShift) & T::kGreenMask) |
+	       ((b << T::kBlueShift) & T::kBlueMask);
+}
+
+template<class T>
+void colorToRGB(uint32 color, uint8 &r, uint8 &g, uint8 &b) {
+	r = ((color & T::kRedMask) >> T::kRedShift) << (8 - T::kRedBits);
+	g = ((color & T::kGreenMask) >> T::kGreenShift) << (8 - T::kGreenBits);
+	b = ((color & T::kBlueMask) >> T::kBlueShift) << (8 - T::kBlueBits);
+}
+
+template<class T>
+void colorToARGB(uint32 color, uint8 &a, uint8 &r, uint8 &g, uint8 &b) {
+	a = ((color & T::kAlphaMask) >> T::kAlphaShift) << (8 - T::kAlphaBits);
+	r = ((color & T::kRedMask) >> T::kRedShift) << (8 - T::kRedBits);
+	g = ((color & T::kGreenMask) >> T::kGreenShift) << (8 - T::kGreenBits);
+	b = ((color & T::kBlueMask) >> T::kBlueShift) << (8 - T::kBlueBits);
+}
 
 #endif
-- 
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