Added support for loading BMFont bitmap font files with love.graphics.newFont (see issue #190.) Some esoteric BMFont features are not supported.

Moved the Font module Lua wrapper code out of the freetype implementation folder.

--HG--
branch : minor

src/modules/font/BMFontRasterizer.h

@@ -0,0 +1,85 @@
+/**
+ * Copyright (c) 2006-2014 LOVE Development Team
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ **/
+
+#ifndef LOVE_FONT_BMFONT_RASTERIZER_H
+#define LOVE_FONT_BMFONT_RASTERIZER_H
+
+// LOVE
+#include "Rasterizer.h"
+#include "image/ImageData.h"
+
+// C++
+#include <map>
+#include <vector>
+
+namespace love
+{
+namespace font
+{
+
+/**
+ * Rasterizer for BMFont bitmap fonts.
+ **/
+class BMFontRasterizer : public Rasterizer
+{
+public:
+
+	BMFontRasterizer(love::filesystem::FileData *fontdef, const std::vector<image::ImageData *> &imagelist);
+	virtual ~BMFontRasterizer();
+
+	// Implements Rasterizer.
+	int getLineHeight() const override;
+	GlyphData *getGlyphData(uint32 glyph) const override;
+	int getGlyphCount() const override;
+	bool hasGlyph(uint32 glyph) const override;
+
+	static bool accepts(love::filesystem::FileData *fontdef);
+
+private:
+
+	struct BMFontCharacter
+	{
+		int x;
+		int y;
+		int page;
+		GlyphMetrics metrics;
+	};
+
+	void parseConfig(const std::string &config);
+
+	std::string fontFolder;
+
+	// Image pages, indexed by their page id.
+	std::map<int, StrongRef<image::ImageData>> images;
+
+	// Glyph characters, indexed by their glyph id.
+	std::map<uint32, BMFontCharacter> characters;
+
+	int fontSize;
+	bool unicode;
+
+	int lineHeight;
+
+}; // BMFontRasterizer
+
+} // font
+} // love
+
+#endif // LOVE_FONT_BMFONT_RASTERIZER_H