(svn r21640) -Change/Feature-ish: allow disabling the shading when drawing text

src/gfx.cpp

@@ -286,9 +286,9 @@ static void SetColourRemap(TextColour colour)
 
 	/* Black strings have no shading ever; the shading is black, so it
 	 * would be invisible at best, but it actually makes it illegible. */
-	bool no_shade   = colour == TC_BLACK;
+	bool no_shade   = colour & TC_NO_SHADE || colour == TC_BLACK;
 	bool raw_colour = colour & TC_IS_PALETTE_COLOUR;
-	colour &= ~TC_IS_PALETTE_COLOUR;
+	colour &= ~(TC_NO_SHADE | TC_IS_PALETTE_COLOUR);
 
 	_string_colourremap[1] = raw_colour ? (byte)colour : _string_colourmap[_use_palette][colour];
 	_string_colourremap[2] = no_shade ? 0 : (_use_palette == PAL_DOS ? 1 : 215);

src/gfx_type.h

@@ -225,6 +225,7 @@ enum TextColour {
 	TC_INVALID     = 0xFF,
 
 	TC_IS_PALETTE_COLOUR = 0x100, ///< Colour value is already a real palette colour index, not an index of a StringColour.
+	TC_NO_SHADE          = 0x200, ///< Do not add shading to this text colour.
 };
 DECLARE_ENUM_AS_BIT_SET(TextColour)