Adding FreeType font generation

lime/graphics/Font.hx

@@ -0,0 +1,55 @@
+package lime.graphics;
+
+import lime.utils.UInt8Array;
+import lime.system.System;
+
+typedef GlyphData = {
+	var image:Image;
+	var glyphs:Array<Dynamic>;
+};
+
+class Font {
+
+	#if (cpp || neko)
+	public var handle:Dynamic;
+	#end
+
+	public function new (fontFace:String) {
+
+		#if (cpp || neko)
+		handle = lime_font_load (fontFace);
+		#end
+
+	}
+
+	public function createImage (size:Int, glyphs:String="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^`'\"/\\&*()[]{}<>|:;_-+=?,. "):GlyphData {
+
+		#if (cpp || neko)
+
+		var data = lime_font_load_glyphs (handle, size, glyphs);
+
+		if (data == null) {
+
+			return null;
+
+		} else {
+
+			return {
+				glyphs: data.glyphs,
+				image: new Image (new UInt8Array (data.image.data), data.image.width, data.image.height, data.image.bpp)
+			};
+
+		}
+
+		#end
+
+		return null;
+
+	}
+
+	#if (cpp || neko)
+	private static var lime_font_load = System.load ("lime", "lime_font_load", 1);
+	private static var lime_font_load_glyphs = System.load ("lime", "lime_font_load_glyphs", 3);
+	#end
+
+}

lime/graphics/Image.hx

@@ -21,6 +21,7 @@ class Image {
 	private static var __context:CanvasRenderingContext2D;
 	#end
 	
+	public var bpp:Int;
 	public var data (get, set):ImageData;
 	public var height:Int;
 	public var offsetX:Int;
@@ -35,7 +36,7 @@ class Image {
 	private var __data:ImageData;
 	
 	
-	public function new (src:ImageSource = null, width:Int = 0, height:Int = 0) {
+	public function new (src:ImageSource = null, width:Int = 0, height:Int = 0, bpp:Int = 4) {
 		
 		this.src = src;
 		#if (!js && !flash)
@@ -44,6 +45,7 @@ class Image {
 		
 		this.width = textureWidth = width;
 		this.height = textureHeight = height;
+		this.bpp = bpp;
 		
 	}
 	
@@ -100,7 +102,7 @@ class Image {
 			
 			for (x in 0...width) {
 				
-				newData.setPixel (y * textureWidth * 4 + x * 4, newData.getPixel (y * width * 4 + x * 4));
+				newData.setPixel (y * textureWidth + x, newData.getPixel (y * width + x));
 				
 			}
 			
@@ -115,15 +117,15 @@ class Image {
 	
 	public static function loadFromFile (path:String) {
 		
-		#if flash
-		
-		throw "Can not load image from file in Flash";
-		
-		#elseif (cpp || neko)
+		#if (cpp || neko)
 		
 		var imageData = lime_image_load (path);
-		return (imageData == null ? null : new Image (new UInt8Array (imageData.data), imageData.width, imageData.height));
+		return (imageData == null ? null : new Image (new UInt8Array (imageData.data), imageData.width, imageData.height, imageData.bpp));
 		
+		#else
+
+		throw "Image.loadFromFile not supported on this target";
+
 		#end
 		
 	}

project/Build.xml

@@ -10,6 +10,7 @@
 	
 	<set name="LIME_CURL" value="1" />
 	<set name="LIME_JPEG" value="1" />
+	<set name="LIME_FREETYPE" value="1" />
 	<!-- <set name="LIME_NEKO" value="1" if="linux" /> -->
 	<set name="LIME_OGG" value="1" />
 	<set name="LIME_OPENAL" value="1" />
@@ -37,6 +38,12 @@
 			
 		</section>
 		
+		<section if="LIME_FREETYPE">
+
+			<compilerflag value="-I${NATIVE_TOOLKIT_PATH}/freetype/include" />
+
+		</section>
+
 		<section if="LIME_NEKO">
 			
 			<compilerflag value="-I${NATIVE_TOOLKIT_PATH}/neko/vm/" />
@@ -83,9 +90,10 @@
 		<file name="src/system/ios/System.mm" if="ios" />
 
 		<file name="src/app/UpdateEvent.cpp" />
+		<file name="src/graphics/Font.cpp" if="LIME_FREETYPE" />
 		<file name="src/graphics/Image.cpp" />
-		<file name="src/graphics/JPEG.cpp" />
-		<file name="src/graphics/PNG.cpp" />
+		<file name="src/graphics/JPEG.cpp" if="LIME_JPEG" />
+		<file name="src/graphics/PNG.cpp" if="LIME_PNG" />
 		<file name="src/graphics/RenderEvent.cpp" />
 		<file name="src/system/System.cpp" />
 		<file name="src/ui/KeyEvent.cpp" />
@@ -97,6 +105,7 @@
 	</files>
 	
 	<include name="lib/curl/files.xml" />
+	<include name="lib/freetype/files.xml" />
 	<include name="lib/jpeg/files.xml" />
 	<include name="lib/neko/files.xml" />
 	<include name="lib/ogg/files.xml" />
@@ -116,6 +125,7 @@
 		
 		<files id="native-toolkit-curl" if="LIME_CURL" />
 		<files id="native-toolkit-jpeg" if="LIME_JPEG" />
+		<files id="native-toolkit-freetype" if="LIME_JPEG" />
 		<files id="native-toolkit-neko" if="LIME_NEKO" />
 		<files id="native-toolkit-ogg" if="LIME_OGG" />
 		<files id="native-toolkit-openal" if="LIME_OPENAL" unless="mac || iphone" />

project/include/graphics/Font.h

@@ -0,0 +1,34 @@
+#ifndef LIME_GRAPHICS_FONT_H
+#define LIME_GRAPHICS_FONT_H
+
+
+#include <hx/CFFI.h>
+#include <list>
+#include <graphics/Image.h>
+#include <ft2build.h>
+#include FT_FREETYPE_H
+
+
+namespace lime {
+
+
+	class Font {
+
+
+		public:
+
+			Font (const char *fontFace);
+			value LoadGlyphs (int size, const char *glyphs, Image *image);
+
+		private:
+
+			FT_Face face;
+
+
+	};
+
+
+}
+
+
+#endif

project/include/graphics/Image.h

@@ -17,10 +17,13 @@ namespace lime {
 			Image ();
 			~Image ();
 			
+			void Resize (int width, int height, int bpp = 4);
+			void Blit (const unsigned char *data, int x, int y, int width, int height);
 			value Value ();
 			
 			int width;
 			int height;
+			int bpp; // bytes per pixel
 			ByteArray *data;
 		
 		

project/src/ExternalInterface.cpp

@@ -10,6 +10,7 @@
 #include <hx/CFFI.h>
 #include <app/Application.h>
 #include <app/UpdateEvent.h>
+#include <graphics/Font.h>
 #include <graphics/Image.h>
 #include <graphics/PNG.h>
 #include <graphics/JPEG.h>
@@ -73,6 +74,26 @@ namespace lime {
 	}
 	
 	
+	value lime_font_load (value fontFace) {
+
+		Font *font = new Font (val_string (fontFace));
+		return alloc_float ((intptr_t)font);
+
+	}
+
+
+	value lime_font_load_glyphs (value fontHandle, value size, value glyphs) {
+
+		Image image;
+		Font *font = (Font*)(intptr_t)val_float (fontHandle);
+		value data = alloc_empty_object ();
+		alloc_field (data, val_id ("glyphs"), font->LoadGlyphs (val_int (size), val_string (glyphs), &image));
+		alloc_field (data, val_id ("image"), image.Value ());
+		return data;
+
+	}
+
+
 	value lime_key_event_manager_register (value callback, value eventObject) {
 		
 		KeyEvent::callback = new AutoGCRoot (callback);
@@ -216,6 +237,8 @@ namespace lime {
 	DEFINE_PRIM (lime_application_exec, 1);
 	DEFINE_PRIM (lime_application_get_ticks, 0);
 	DEFINE_PRIM (lime_image_load, 1);
+	DEFINE_PRIM (lime_font_load, 1);
+	DEFINE_PRIM (lime_font_load_glyphs, 3);
 	DEFINE_PRIM (lime_key_event_manager_register, 2);
 	DEFINE_PRIM (lime_lzma_encode, 1);
 	DEFINE_PRIM (lime_lzma_decode, 1);

project/src/graphics/Font.cpp

@@ -0,0 +1,185 @@
+#include <graphics/Font.h>
+
+typedef struct {
+
+	char c;
+	FT_UInt index;
+	FT_Pos height;
+
+} GlyphInfo;
+
+namespace lime {
+
+
+	static int id_x;
+	static int id_y;
+	static int id_width;
+	static int id_height;
+	static int id_char;
+	static bool init = false;
+
+
+	bool CompareGlyph (const GlyphInfo &a, const GlyphInfo &b) {
+
+		return a.height > b.height;
+
+	}
+
+
+	Font::Font (const char *fontFace) {
+
+		int error;
+		FT_Library library;
+
+		error = FT_Init_FreeType (&library);
+
+		if (error) {
+
+			printf ("Could not initialize FreeType\n");
+
+		}
+
+		error = FT_New_Face (library, fontFace, 0, &face);
+
+		if (error == FT_Err_Unknown_File_Format) {
+
+			printf ("Invalid font type\n");
+
+		} else if (error) {
+
+			printf ("Failed to load font face %s\n", fontFace);
+
+		}
+
+	}
+
+
+	value Font::LoadGlyphs (int size, const char *glyphs, Image *image) {
+
+		if (!init) {
+
+			id_width = val_id ("width");
+			id_height = val_id ("height");
+			id_x = val_id ("x");
+			id_y = val_id ("y");
+			id_char = val_id ("char");
+			init = true;
+
+		}
+
+		std::list<GlyphInfo> glyphList;
+		int numGlyphs = strlen (glyphs);
+		char c[2] = " ";
+
+		FT_Set_Pixel_Sizes (face, 0, size);
+
+		for (int i = 0; i < numGlyphs; i++) {
+
+			GlyphInfo info;
+			info.c = glyphs[i];
+			info.index = FT_Get_Char_Index (face, info.c);
+
+			if (FT_Load_Glyph (face, info.index, FT_LOAD_DEFAULT) != 0) continue;
+			info.height = face->glyph->metrics.height;
+
+			glyphList.push_back(info);
+
+		}
+
+		glyphList.sort(CompareGlyph);
+
+		image->Resize(128, 128, 1);
+		int x = 0, y = 0, maxRows = 0;
+		unsigned char *bytes = image->data->Bytes ();
+
+		value rects = alloc_array (glyphList.size());
+		int rectsIndex = 0;
+
+		for (std::list<GlyphInfo>::iterator it = glyphList.begin(); it != glyphList.end(); it++) {
+
+			FT_Load_Glyph (face, (*it).index, FT_LOAD_DEFAULT);
+			c[0] = (*it).c;
+
+			if (FT_Render_Glyph (face->glyph, FT_RENDER_MODE_NORMAL) != 0) continue;
+
+			FT_Bitmap bitmap = face->glyph->bitmap;
+
+			if (x + bitmap.width > image->width) {
+
+				y += maxRows + 1;
+				x = maxRows = 0;
+
+			}
+
+			if (y + bitmap.rows > image->height) {
+
+				if (image->width < image->height) {
+
+					image->width *= 2;
+
+				} else {
+
+					image->height *= 2;
+
+				}
+
+				image->Resize (image->width, image->height, 1);
+				rectsIndex = 0;
+				it = glyphList.begin ();
+				it--;
+				x = y = maxRows = 0;
+				continue;
+
+			}
+
+			if (image->bpp == 1) {
+
+				image->Blit (bitmap.buffer, x, y, bitmap.width, bitmap.rows);
+
+			} else {
+
+				for (int row = 0; row < bitmap.rows; row++) {
+
+					unsigned char *out = &bytes[((row + y) * image->width + x) * image->bpp];
+					const unsigned char *line = &bitmap.buffer[row * bitmap.width]; // scanline
+					const unsigned char *const end = line + bitmap.width;
+
+					while (line != end) {
+
+						*out++ = 0xFF;
+						*out++ = 0xFF;
+						*out++ = 0xFF;
+						*out++ = *line;
+
+						line++;
+
+					}
+
+				}
+
+			}
+
+			value v = alloc_empty_object ();
+			alloc_field (v, id_x, alloc_int (x));
+			alloc_field (v, id_y, alloc_int (y));
+			alloc_field (v, id_width, alloc_int (bitmap.width));
+			alloc_field (v, id_height, alloc_int (bitmap.rows));
+			alloc_field (v, id_char, alloc_string (c));
+			val_array_set_i (rects, rectsIndex++, v);
+
+			x += bitmap.width + 1;
+
+			if (bitmap.rows > maxRows) {
+
+				maxRows = bitmap.rows;
+
+			}
+
+		}
+
+		return rects;
+
+	}
+
+
+}

project/src/graphics/Image.cpp

@@ -7,6 +7,7 @@ namespace lime {
 	static int id_data;
 	static int id_height;
 	static int id_width;
+	static int id_bpp;
 	static bool init = false;
 	
 	
@@ -14,6 +15,7 @@ namespace lime {
 		
 		width = 0;
 		height = 0;
+		bpp = 4;
 		data = 0;
 		
 	}
@@ -26,6 +28,37 @@ namespace lime {
 	}
 	
 	
+	void Image::Resize (int width, int height, int bpp) {
+
+		this->bpp = bpp;
+		this->width = width;
+		this->height = height;
+		if (this->data) delete this->data;
+		this->data = new ByteArray (width * height * bpp);
+
+	}
+
+
+	void Image::Blit (const unsigned char *data, int x, int y, int width, int height) {
+
+		if (x < 0 || x + width > this->width ||
+			y < 0 || y + height > this->height) {
+
+			return;
+
+		}
+
+		unsigned char *bytes = this->data->Bytes ();
+
+		for (int i = 0; i < height; i++) {
+
+			memcpy (&bytes[(i + y) * this->width + x], &data[i * width], width * bpp);
+
+		}
+
+	}
+
+
 	value Image::Value() {
 		
 		if (!init) {
@@ -33,6 +66,7 @@ namespace lime {
 			id_width = val_id ("width");
 			id_height = val_id ("height");
 			id_data = val_id ("data");
+			id_bpp = val_id ("bpp");
 			init = true;
 
 		}
@@ -40,6 +74,7 @@ namespace lime {
 		mValue = alloc_empty_object ();
 		alloc_field (mValue, id_width, alloc_int (width));
 		alloc_field (mValue, id_height, alloc_int (height));
+		alloc_field (mValue, id_bpp, alloc_int (bpp));
 		alloc_field (mValue, id_data, data->mValue);
 		return mValue;
 		

project/src/graphics/JPEG.cpp

@@ -28,10 +28,8 @@ namespace lime {
 		if (jpeg_read_header (&cinfo, TRUE) == JPEG_HEADER_OK) {
 			
 			jpeg_start_decompress (&cinfo);
-			image->width = cinfo.output_width;
-			image->height = cinfo.output_height;
 			int components = cinfo.num_components;
-			image->data = new ByteArray (image->width * image->height * 4);
+			image->Resize(cinfo.output_width, cinfo.output_height);
 			
 			unsigned char *bytes = image->data->Bytes ();
 			unsigned char *scanline = new unsigned char [image->width * image->height * components];

project/src/graphics/PNG.cpp

@@ -72,10 +72,9 @@ namespace lime {
 		if (bit_depth == 16)
 			png_set_strip_16 (png_ptr);
 		
-		const unsigned int stride = width * 4;
-		image->width = width;
-		image->height = height;
-		image->data = new ByteArray (height * stride);
+		int bpp = 4;
+		const unsigned int stride = width * bpp;
+		image->Resize(width, height, bpp);
 		
 		png_bytepp row_ptrs = new png_bytep[height];
 		unsigned char *bytes = image->data->Bytes ();