Switched to freetype 2.6, started implementing subpixel hinting support

Author: ivansafrin

CMake/ExternalFreetype.cmake

@@ -7,18 +7,18 @@ SET(freetype_CMAKE_ARGS
     -DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}
     -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR> 
     -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
-	-DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
+    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
     -DCMAKE_OSX_ARCHITECTURES=${CMAKE_OSX_ARCHITECTURES}
 )
 
 EXTERNALPROJECT_ADD(freetype
     PREFIX ${freetype_PREFIX}
 
     DOWNLOAD_DIR ${POLYCODE_DEPS_DOWNLOAD_DIR}
-    URL http://download.savannah.gnu.org/releases/freetype/freetype-2.4.5.tar.gz
-    URL_MD5 0e67460b312df905dc1cc1586690e7b2
+    URL http://download.savannah.gnu.org/releases/freetype/freetype-2.6.tar.gz
+    URL_MD5 1d733ea6c1b7b3df38169fbdbec47d2b
 
-    PATCH_COMMAND ${CMAKE_COMMAND} -E copy_if_different ${PolycodeDependencies_SOURCE_DIR}/../CMake/freetype.cmake <SOURCE_DIR>/CMakeLists.txt
+    PATCH_COMMAND ${CMAKE_COMMAND} -E copy_if_different ${PolycodeDependencies_SOURCE_DIR}/../CMake/freetype/ftoption.h <SOURCE_DIR>/include/config/ftoption.h
 
     INSTALL_DIR ${POLYCODE_DEPS_CORE_PREFIX}
     CMAKE_ARGS ${freetype_CMAKE_ARGS}

CMake/freetype.cmake

@@ -178,7 +178,7 @@ namespace Polycode {
 			static const int ANTIALIAS_FULL = 0;
 			static const int ANTIALIAS_NONE = 1;
 			static const int ANTIALIAS_STRONG = 2;			
-			
+			static const int ANTIALIAS_LCD = 3;
             /**
              * Returns the pixel distance from top of image to the baseline of the rendered text.
              */

CMake/freetype/ftoption.h

@@ -271,6 +271,9 @@ void Label::precacheGlyphs(String text, GlyphData *glyphData) {
 		glyphData->positions[glyphData->num_glyphs].y = pen_y;
 
 		switch(antiAliasMode) {
+            case ANTIALIAS_LCD:
+                error = FT_Load_Glyph( face, glyph_index, FT_LOAD_TARGET_LCD);
+            break;
 			case ANTIALIAS_FULL:
 			case ANTIALIAS_STRONG:
 				error = FT_Load_Glyph( face, glyph_index, FT_LOAD_TARGET_LIGHT);			
@@ -315,6 +318,26 @@ void Label::drawGlyphBitmap(FT_Bitmap *bitmap, unsigned int x, unsigned int y, C
 	}
 
 	switch(antiAliasMode) {
+			case ANTIALIAS_LCD:
+            {
+                unsigned char *src = bitmap->buffer;
+                for(int j=0; j < bitmap->rows;j++) {
+                    unsigned char b;
+                    unsigned char *bptr =  src;
+                    for(int k=0; k < bitmap->width ; k+=3){
+                        imageData[xoff+lineoffset] = *(bptr);
+                        imageData[xoff+lineoffset+1] =  *(bptr+1);
+                        imageData[xoff+lineoffset+2] =  *(bptr+2);
+                        imageData[xoff+lineoffset+3] = 255; //((*(bptr)) + (*(bptr+1)) + (*(bptr+2))) / 3;
+                        bptr += 3;
+                        xoff += 4;
+                    }
+                    lineoffset -= ((width*4)+(bitmap->width * 4 / 3));
+                    src += bitmap->pitch;
+                }
+                
+            }
+            break;
 			case ANTIALIAS_FULL:
 			case ANTIALIAS_STRONG:			
 				for(int j = 0; j < ((bitmap->width * bitmap->rows)); j++) {
@@ -386,7 +409,9 @@ void Label::renderGlyphs(GlyphData *glyphData) {
 		pen.x = (start_x + glyphData->positions[n].x) * 64;
 		pen.y = (start_y + glyphData->positions[n].y) * 64;		
 
-		if(antiAliasMode == ANTIALIAS_FULL || antiAliasMode == ANTIALIAS_STRONG) {
+        if(antiAliasMode == ANTIALIAS_LCD) {
+			error = FT_Glyph_To_Bitmap( &image, FT_RENDER_MODE_LCD, &pen, 0 );
+        } else if(antiAliasMode == ANTIALIAS_FULL || antiAliasMode == ANTIALIAS_STRONG) {
 			error = FT_Glyph_To_Bitmap( &image, FT_RENDER_MODE_LIGHT, &pen, 0 );		
 		} else {
 			error = FT_Glyph_To_Bitmap( &image, FT_RENDER_MODE_MONO, &pen, 0 );				
@@ -417,7 +442,7 @@ void Label::setText(const String& text) {
 		return;
 	if(!font->isValid())
 		return;
-
+    
 	this->text = text;
 
 	precacheGlyphs(text, &labelData);

Core/Contents/Include/PolyLabel.h

@@ -3982,6 +3982,7 @@
 					"\"$(SRCROOT)/../../Modules/Dependencies/include/bullet\"",
 					"\"$(SRCROOT)/Contents\"",
 					/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/OpenAL.framework/Headers,
+					"\"$(SRCROOT)/../../Core/Dependencies/include/freetype2\"",
 				);
 				LIBRARY_SEARCH_PATHS = (
 					"$(inherited)",
@@ -4018,6 +4019,7 @@
 					"\"$(SRCROOT)/../../Modules/Dependencies/include/bullet\"",
 					"\"$(SRCROOT)/Contents\"",
 					/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/OpenAL.framework/Headers,
+					"\"$(SRCROOT)/../../Core/Dependencies/include/freetype2\"",
 				);
 				LIBRARY_SEARCH_PATHS = (
 					"$(inherited)",

Core/Contents/Source/PolyLabel.cpp

@@ -576,6 +576,7 @@
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Core/Dependencies/include\"",
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Modules/include\"",
 					/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/OpenAL.framework/Headers,
+					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Core/Dependencies/include/freetype2\"",
 				);
 				INFOPLIST_FILE = "Polycode-Info.plist";
 				INSTALL_PATH = "$(HOME)/Applications";
@@ -608,6 +609,7 @@
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Core/Dependencies/include\"",
 					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Modules/include\"",
 					/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/OpenAL.framework/Headers,
+					"\"$(SRCROOT)/../../../Release/Darwin/Framework/Core/Dependencies/include/freetype2\"",
 				);
 				INFOPLIST_FILE = "Polycode-Info.plist";
 				INSTALL_PATH = "$(HOME)/Applications";