Implementation of BFont::Blocks

BFont::Blocks is now implemented in ServerFont, via a call through the
app_server.  It uses fontconfig to iterate through a charset of a font
and stores the defined blocks in a bitmap.

A new API was added, BFont::IncludesBlock, that will allow for arbitrary
testing of a given Unicode block. Since nothing is cached, searching
through an entire charset for a series of Unicode blocks can be quite
slow. In a given block there may be only 1 or 2 characters actually
defined so every character within a block needs to be checked until one
is found, which in a degenerate case will mean the entire block is
checked.

Signed-off-by: Axel Dörfler <[email protected]>

build/jam/BuildFeatures

@@ -303,6 +303,21 @@ if [ IsPackageAvailable freetype_devel ] {
 	Echo "Freetype support not available on $(TARGET_PACKAGING_ARCH)" ;
 }
 
+# fontconfig
+if [ IsPackageAvailable fontconfig_devel ] {
+	ExtractBuildFeatureArchives fontconfig :
+		file: base fontconfig
+			runtime: lib
+		file: devel fontconfig_devel
+			depends: base
+			library: $(developLibDir)/libfontconfig.so
+			headers: $(developHeadersDir) $(developHeadersDir)/fontconfig
+		;
+
+	EnableBuildFeatures fontconfig ;
+} else {
+	Echo "fontconfig support not available on $(TARGET_PACKAGING_ARCH)" ;
+}
 
 # Gutenprint
 if [ IsPackageAvailable gutenprint_devel ] {

build/jam/OptionalPackages

@@ -100,8 +100,8 @@ if [ IsOptionalHaikuImagePackageAdded Development ] {
 	local architectureObject ;
 	for architectureObject in [ MultiArchSubDirSetup ] {
 		on $(architectureObject) {
-			AddHaikuImagePackages curl_devel ffmpeg_devel freetype_devel
-				glu_devel jpeg_devel libpng16_devel zlib_devel ;
+			AddHaikuImagePackages curl_devel ffmpeg_devel fontconfig_devel
+				freetype_devel glu_devel jpeg_devel libpng16_devel zlib_devel ;
 		}
 	}
 }