Laying the foundation for preliminary bitdepth negotiation. (No functionality changes yet)

svn-id: r41396

1 files changed, 60 insertions, 0 deletions

diff --git a/graphics/pixelformat.h b/graphics/pixelformat.h
index f59650e5cc..2e8c065414 100644
--- a/graphics/pixelformat.h
+++ b/graphics/pixelformat.h
@@ -30,6 +30,66 @@
 
 namespace Graphics {
 
+#ifdef ENABLE_16BIT
+/**
+ * A condensed bit format description.
+ *
+ * It includes the necessary information to create a PixelFormat and/or 
+ * ColorMask which fully describe the given color format.
+ *
+ * It contains two components, the format (8Bit paletted, RGB555, etc)
+ * and the order (palette, ARGB, ABGR, etc)
+ *
+ * Use (format & kFormatTypeMask) to get the type, and (format & kFormatOrderMask)
+ * to get the applicable color order.
+  */
+enum ColorFormat {
+	kFormat8Bit = 0,
+	kFormatRGB555 = 1,
+	kFormatARGB1555 = 2,	// Rare, but I know a guy who knows a guy who's heard of it being used
+	kFormatRGB556 = 3,		// 6 bits for blue, in case this ever happens
+	kFormatRGB565 = 4,
+	kFormatRGB655 = 5,		// 6 bits for red, in case this ever happens
+	kFormatARGB4444 = 6,
+	kFormatRGB888 = 7,
+	kFormatARGB6666 = 8,	// I've never heard of this, but it's theoretically possible
+	kFormatARGB8888 = 9,
+	kFormatTypeMask = 0xFF, // & by this to get the overall bit format
+	kFormatPalette = 0 << 8,
+	kFormatRGB = 1 << 8,
+	kFormatRBG = 2 << 8,
+	kFormatGRB = 3 << 8,
+	kFormatGBR = 4 << 8,
+	kFormatBRG = 5 << 8,
+	kFormatBGR = 6 << 8,
+	kFormatARGB = 7 << 8,
+	kFormatARBG = 8 << 8,
+	kFormatAGRB = 9 << 8,
+	kFormatAGBR = 10 << 8,
+	kFormatABRG = 11 << 8,
+	kFormatABGR = 12 << 8,
+	kFormatRAGB = 13 << 8,
+	kFormatRABG = 14 << 8,
+	kFormatGARB = 15 << 8,
+	kFormatGABR = 16 << 8,
+	kFormatBARG = 17 << 8,
+	kFormatBAGR = 18 << 8,
+	kFormatRGAB = 19 << 8,
+	kFormatRBAG = 20 << 8,
+	kFormatGRAB = 21 << 8,
+	kFormatGBAR = 22 << 8,
+	kFormatBRAG = 23 << 8,
+	kFormatBGAR = 24 << 8,
+	kFormatRGBA = 25 << 8,
+	kFormatRBGA = 26 << 8,
+	kFormatGRBA = 27 << 8,
+	kFormatGBRA = 28 << 8,
+	kFormatBRGA = 29 << 8,
+	kFormatBGRA = 30 << 8,
+	kFormatOrderMask = 0xFF << 8 // & by this to get the order
+};
+#endif
+
 /**
  * A pixel format description.
  *