(svn r21637) -Codechange: make it more clear that IS_PALETTE_COLOUR belongs to TextColour
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		@@ -118,8 +118,8 @@ void SetLocalCompany(CompanyID new_company)
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 */
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uint16 GetDrawStringCompanyColour(CompanyID company)
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{
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	if (!Company::IsValidID(company)) return _colour_gradient[COLOUR_WHITE][4] | IS_PALETTE_COLOUR;
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	return (_colour_gradient[_company_colours[company]][4]) | IS_PALETTE_COLOUR;
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	if (!Company::IsValidID(company)) return _colour_gradient[COLOUR_WHITE][4] | TC_IS_PALETTE_COLOUR;
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	return (_colour_gradient[_company_colours[company]][4]) | TC_IS_PALETTE_COLOUR;
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}
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/**
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@@ -284,8 +284,8 @@ static void SetColourRemap(TextColour colour)
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{
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	if (colour == TC_INVALID) return;
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	if (colour & IS_PALETTE_COLOUR) {
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		_string_colourremap[1] = colour & ~IS_PALETTE_COLOUR;
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	if (colour & TC_IS_PALETTE_COLOUR) {
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		_string_colourremap[1] = colour & ~TC_IS_PALETTE_COLOUR;
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		_string_colourremap[2] = (_use_palette == PAL_DOS) ? 1 : 215;
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	} else {
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		_string_colourremap[1] = _string_colourmap[_use_palette][colour].text;
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@@ -224,7 +224,7 @@ enum TextColour {
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	TC_BLACK       = 0x10,
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	TC_INVALID     = 0xFF,
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	IS_PALETTE_COLOUR = 0x100, ///< colour value is already a real palette colour index, not an index of a StringColour
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	TC_IS_PALETTE_COLOUR = 0x100, ///< Colour value is already a real palette colour index, not an index of a StringColour.
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};
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DECLARE_ENUM_AS_BIT_SET(TextColour)
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@@ -103,7 +103,7 @@ void CDECL NetworkAddChatMessage(TextColour colour, uint duration, const char *m
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		/* The default colour for a message is company colour. Replace this with
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		 * white for any additional lines */
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		cmsg->colour = (bufp == buf && (colour & IS_PALETTE_COLOUR)) ? colour : TC_WHITE;
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		cmsg->colour = (bufp == buf && (colour & TC_IS_PALETTE_COLOUR)) ? colour : TC_WHITE;
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		cmsg->remove_time = _realtime_tick + duration * 1000;
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		bufp += strlen(bufp) + 1; // jump to 'next line' in the formatted string
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@@ -1407,9 +1407,9 @@ static void ViewportDrawStrings(DrawPixelInfo *dpi, const StringSpriteToDrawVect
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			/* if we didn't draw a rectangle, or if transparant building is on,
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			 * draw the text in the colour the rectangle would have */
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			if (IsTransparencySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) {
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				/* Real colours need the IS_PALETTE_COLOUR flag
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				/* Real colours need the TC_IS_PALETTE_COLOUR flag
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				 * otherwise colours from _string_colourmap are assumed. */
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				colour = (TextColour)_colour_gradient[ss->colour][6] | IS_PALETTE_COLOUR;
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				colour = (TextColour)_colour_gradient[ss->colour][6] | TC_IS_PALETTE_COLOUR;
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			}
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			/* Draw the rectangle if 'tranparent station signs' is off,
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