Added an optional spacing argument to love.graphics.newImageFont, allowing additional spacing (positive or negative) to be applied to all glyphs rendered using that font.

src/modules/font/Font.cpp

@@ -54,7 +54,7 @@ Rasterizer *Font::newBMFontRasterizer(love::filesystem::FileData *fontdef, const
 	return new BMFontRasterizer(fontdef, images);
 }
 
-Rasterizer *Font::newImageRasterizer(love::image::ImageData *data, const std::string &text)
+Rasterizer *Font::newImageRasterizer(love::image::ImageData *data, const std::string &text, int extraspacing)
 {
 	std::vector<uint32> glyphs;
 	glyphs.reserve(text.size());
@@ -72,12 +72,12 @@ Rasterizer *Font::newImageRasterizer(love::image::ImageData *data, const std::st
 		throw love::Exception("UTF-8 decoding error: %s", e.what());
 	}
 
-	return newImageRasterizer(data, &glyphs[0], (int) glyphs.size());
+	return newImageRasterizer(data, &glyphs[0], (int) glyphs.size(), extraspacing);
 }
 
-Rasterizer *Font::newImageRasterizer(love::image::ImageData *data, uint32 *glyphs, int numglyphs)
+Rasterizer *Font::newImageRasterizer(love::image::ImageData *data, uint32 *glyphs, int numglyphs, int extraspacing)
 {
-	return new ImageRasterizer(data, glyphs, numglyphs);
+	return new ImageRasterizer(data, glyphs, numglyphs, extraspacing);
 }
 
 GlyphData *Font::newGlyphData(Rasterizer *r, const std::string &text)

src/modules/font/Font.h

@@ -52,8 +52,8 @@ public:
 
 	virtual Rasterizer *newBMFontRasterizer(love::filesystem::FileData *fontdef, const std::vector<image::ImageData *> &images);
 
-	virtual Rasterizer *newImageRasterizer(love::image::ImageData *data, const std::string &glyphs);
-	virtual Rasterizer *newImageRasterizer(love::image::ImageData *data, uint32 *glyphs, int length);
+	virtual Rasterizer *newImageRasterizer(love::image::ImageData *data, const std::string &glyphs, int extraspacing);
+	virtual Rasterizer *newImageRasterizer(love::image::ImageData *data, uint32 *glyphs, int length, int extraspacing);
 
 	virtual GlyphData *newGlyphData(Rasterizer *r, const std::string &glyph);
 	virtual GlyphData *newGlyphData(Rasterizer *r, uint32 glyph);

src/modules/font/ImageRasterizer.cpp

@@ -34,10 +34,11 @@ inline bool equal(const love::image::pixel &a, const love::image::pixel &b)
 	return (a.r == b.r && a.g == b.g && a.b == b.b && a.a == b.a);
 }
 
-ImageRasterizer::ImageRasterizer(love::image::ImageData *data, uint32 *glyphs, int numglyphs)
+ImageRasterizer::ImageRasterizer(love::image::ImageData *data, uint32 *glyphs, int numglyphs, int extraspacing)
 	: imageData(data)
 	, glyphs(glyphs)
 	, numglyphs(numglyphs)
+	, extraSpacing(extraspacing)
 {
 	load();
 }
@@ -60,7 +61,7 @@ GlyphData *ImageRasterizer::getGlyphData(uint32 glyph) const
 	if (it != imageGlyphs.end())
 	{
 		gm.width = it->second.width;
-		gm.advance = it->second.width;
+		gm.advance = it->second.width + extraSpacing;
 	}
 
 	gm.height = metrics.height;

src/modules/font/ImageRasterizer.h

@@ -39,7 +39,7 @@ namespace font
 class ImageRasterizer : public Rasterizer
 {
 public:
-	ImageRasterizer(love::image::ImageData *imageData, uint32 *glyphs, int numglyphs);
+	ImageRasterizer(love::image::ImageData *imageData, uint32 *glyphs, int numglyphs, int extraspacing);
 	virtual ~ImageRasterizer();
 
 	// Implement Rasterizer
@@ -49,6 +49,14 @@ public:
 	virtual bool hasGlyph(uint32 glyph) const;
 
 private:
+
+	// Information about a glyph in the ImageData
+	struct ImageGlyphData
+	{
+		int x;
+		int width;
+	};
+
 	// Load all the glyph positions into memory
 	void load();
 
@@ -61,12 +69,7 @@ private:
 	// Number of glyphs in the font
 	int numglyphs;
 
-	// Information about a glyph in the ImageData
-	struct ImageGlyphData
-	{
-		int x;
-		int width;
-	};
+	int extraSpacing;
 
 	std::map<uint32, ImageGlyphData> imageGlyphs;
 

src/modules/font/wrap_Font.cpp

@@ -162,8 +162,9 @@ int w_newImageRasterizer(lua_State *L)
 
 	image::ImageData *d = luax_checktype<image::ImageData>(L, 1, IMAGE_IMAGE_DATA_ID);
 	std::string glyphs = luax_checkstring(L, 2);
+	int extraspacing = luaL_optint(L, 3, 0);
 
-	luax_catchexcept(L, [&](){ t = instance()->newImageRasterizer(d, glyphs); });
+	luax_catchexcept(L, [&](){ t = instance()->newImageRasterizer(d, glyphs, extraspacing); });
 
 	luax_pushtype(L, FONT_RASTERIZER_ID, t);
 	t->release();

src/modules/graphics/opengl/wrap_Graphics.cpp

@@ -339,9 +339,13 @@ int w_newImageFont(lua_State *L)
 	// Convert to Rasterizer if necessary.
 	if (!luax_istype(L, 1, FONT_RASTERIZER_ID))
 	{
-		luaL_checkstring(L, 2);
-		int idxs[] = {1, 2};
-		luax_convobj(L, idxs, 2, "font", "newImageRasterizer");
+		luaL_checktype(L, 2, LUA_TSTRING);
+
+		std::vector<int> idxs;
+		for (int i = 0; i < lua_gettop(L); i++)
+			idxs.push_back(i + 1);
+
+		luax_convobj(L, &idxs[0], (int) idxs.size(), "font", "newImageRasterizer");
 	}
 
 	love::font::Rasterizer *rasterizer = luax_checktype<love::font::Rasterizer>(L, 1, FONT_RASTERIZER_ID);