Fix accidental bogus copying of the font binary

src/servo/text/font.rs

@@ -33,10 +33,10 @@ impl Font {
     }
 }
 
-fn Font(fontbuf: ~[u8], +native_font: NativeFont) -> Font {
+fn Font(fontbuf: @~[u8], +native_font: NativeFont) -> Font {
     Font {
-        fontbuf : @fontbuf,
-        native_font : native_font,
+        fontbuf : fontbuf,
+        native_font : move native_font,
     }
 }
 
@@ -73,6 +73,29 @@ fn should_get_glyph_advance() {
     assert x == 15;
 }
 
+// Testing thread safety
+fn should_get_glyph_advance_stress() {
+    #[test];
+
+    let mut ports = ~[];
+
+    for iter::repeat(100) {
+        let (chan, port) = pipes::stream();
+        ports += [@move port];
+        do task::spawn {
+            let lib = FontLibrary();
+            let font = lib.get_test_font();
+            let x = font.glyph_h_advance(40u);
+            assert x == 15;
+            chan.send(());
+        }
+    }
+
+    for ports.each |port| {
+        port.recv();
+    }
+}
+
 fn should_be_able_to_create_instances_in_multiple_threads() {
     #[test];
 

src/servo/text/font_library.rs

@@ -30,8 +30,8 @@ fn FontLibrary() -> FontLibrary {
 }
 
 fn create_font(native_lib: &native::NativeFontLibrary) -> Result<@Font, ()> {
-    let font_bin = test_font_bin();
-    let native_font = native_font::create(native_lib, &font_bin);
+    let font_bin = @test_font_bin();
+    let native_font = native_font::create(native_lib, font_bin);
     let native_font = if native_font.is_ok() {
         result::unwrap(native_font)
     } else {

src/servo/text/native_font.rs

@@ -18,13 +18,13 @@ type NativeFont/& = quartz_native_font::QuartzNativeFont;
 type NativeFont/& = ft_native_font::FreeTypeNativeFont;
 
 #[cfg(target_os = "macos")]
-fn create(_native_lib: &NativeFontLibrary, buf: &~[u8]) -> Result<NativeFont, ()> {
+fn create(_native_lib: &NativeFontLibrary, buf: @~[u8]) -> Result<NativeFont, ()> {
     quartz_native_font::create(buf)
 }
 
 #[cfg(target_os = "linux")]
-fn create(native_lib: &NativeFontLibrary, buf: &~[u8]) -> Result<NativeFont, ()> {
-    ft_native_font::create(*native_lib, buf)
+fn create(native_lib: &NativeFontLibrary, buf: @~[u8]) -> Result<NativeFont, ()> {
+    ft_native_font::create(native_lib, buf)
 }
 
 #[cfg(target_os = "macos")]

src/servo/text/native_font/ft_native_font.rs

@@ -17,6 +17,8 @@ use freetype::bindgen::{
 };
 
 struct FreeTypeNativeFont {
+    /// The font binary. This must stay valid for the lifetime of the font
+    buf: @~[u8],
     face: FT_Face,
 
     drop {
@@ -27,9 +29,9 @@ struct FreeTypeNativeFont {
     }
 }
 
-fn FreeTypeNativeFont(face: FT_Face) -> FreeTypeNativeFont {
+fn FreeTypeNativeFont(face: FT_Face, buf: @~[u8]) -> FreeTypeNativeFont {
     assert face.is_not_null();
-    FreeTypeNativeFont { face: face }
+    FreeTypeNativeFont { buf: buf, face: face }
 }
 
 impl FreeTypeNativeFont {
@@ -67,16 +69,16 @@ impl FreeTypeNativeFont {
     }
 }
 
-fn create(lib: FT_Library, buf: &~[u8]) -> Result<FreeTypeNativeFont, ()> {
+fn create(lib: &FT_Library, buf: @~[u8]) -> Result<FreeTypeNativeFont, ()> {
     assert lib.is_not_null();
     let face: FT_Face = null();
     return vec_as_buf(*buf, |cbuf, _len| {
-           if FT_New_Memory_Face(lib, cbuf, (*buf).len() as FT_Long,
+           if FT_New_Memory_Face(*lib, cbuf, (*buf).len() as FT_Long,
                                  0 as FT_Long, addr_of(face)).succeeded() {
                // FIXME: These values are placeholders
                let res = FT_Set_Char_Size(face, 0, 20*64, 0, 72);
                if !res.succeeded() { fail ~"unable to set font char size" }
-               Ok(FreeTypeNativeFont(face))
+               Ok(FreeTypeNativeFont(face, buf))
            } else {
                Err(())
            }
@@ -96,23 +98,23 @@ fn with_test_native_font(f: fn@(nf: &NativeFont)) {
     use unwrap_result = result::unwrap;
 
     with_lib(|lib| {
-        let buf = test_font_bin();
-        let font = unwrap_result(create(lib, &buf));
+        let buf = @test_font_bin();
+        let font = unwrap_result(create(lib, move buf));
         f(&font);
     })
 }
 
-fn with_lib(f: fn@(FT_Library)) {
+fn with_lib(f: fn@((&FT_Library))) {
     let lib: FT_Library = null();
     assert FT_Init_FreeType(addr_of(lib)).succeeded();
-    f(lib);
+    f(&lib);
     FT_Done_FreeType(lib);
 }
 
 #[test]
 fn create_should_return_err_if_buf_is_bogus() {
     with_lib(|lib| {
-        let buf = &~[];
+        let buf = @~[];
         assert create(lib, buf).is_err();
     })
 }

src/servo/text/native_font/quartz_native_font.rs

@@ -127,7 +127,7 @@ fn ctfont_from_cgfont(cgfont: CGFontRef) -> coretext::CTFontRef {
     CTFontCreateWithGraphicsFont(cgfont, 21f as CGFloat, null(), null())
 }
 
-fn create(buf: &~[u8]) -> Result<QuartzNativeFont, ()> {
+fn create(buf: @~[u8]) -> Result<QuartzNativeFont, ()> {
     let fontprov = vec::as_imm_buf(*buf, |cbuf, len| {
         CGDataProviderCreateWithData(
             null(),
@@ -150,8 +150,8 @@ fn with_test_native_font(f: fn@(nf: &NativeFont)) {
     use font::test_font_bin;
     use unwrap_result = result::unwrap;
 
-    let buf = test_font_bin();
-    let res = create(&buf);
+    let buf = @test_font_bin();
+    let res = create(buf);
     let font = unwrap_result(res);
     f(&font);
 }