Font variations.

Multiple Master and TrueType fonts support variation axes.
This implements back-end support for axes on platforms which
support it.

Review URL: https://codereview.chromium.org/1027373002

1 files changed, 21 insertions, 9 deletions

diff --git a/src/core/SkTypeface.cpp b/src/core/SkTypeface.cpp
index 0f5d70b1a8..6d9759f42c 100644
--- a/src/core/SkTypeface.cpp
+++ b/src/core/SkTypeface.cpp
@@ -143,6 +143,11 @@ SkTypeface* SkTypeface::CreateFromStream(SkStreamAsset* stream, int index) {
     return fm->createFromStream(stream, index);
 }
 
+SkTypeface* SkTypeface::CreateFromFontData(SkFontData* data) {
+    SkAutoTUnref<SkFontMgr> fm(SkFontMgr::RefDefault());
+    return fm->createFromFontData(data);
+}
+
 SkTypeface* SkTypeface::CreateFromFile(const char path[], int index) {
     SkAutoTUnref<SkFontMgr> fm(SkFontMgr::RefDefault());
     return fm->createFromFile(path, index);
@@ -156,10 +161,8 @@ void SkTypeface::serialize(SkWStream* wstream) const {
     this->onGetFontDescriptor(&desc, &isLocal);
 
     // Embed font data if it's a local font.
-    if (isLocal && !desc.hasFontData()) {
-        int ttcIndex;
-        desc.setFontData(this->onOpenStream(&ttcIndex));
-        desc.setFontIndex(ttcIndex);
+    if (!desc.hasFontData()) {
+        desc.setFontData(this->onCreateFontData());
     }
     desc.serialize(wstream);
 }
@@ -171,18 +174,16 @@ void SkTypeface::serializeForcingEmbedding(SkWStream* wstream) const {
 
     // Always embed font data.
     if (!desc.hasFontData()) {
-        int ttcIndex;
-        desc.setFontData(this->onOpenStream(&ttcIndex));
-        desc.setFontIndex(ttcIndex);
+        desc.setFontData(this->onCreateFontData());
     }
     desc.serialize(wstream);
 }
 
 SkTypeface* SkTypeface::Deserialize(SkStream* stream) {
     SkFontDescriptor desc(stream);
-    SkStreamAsset* data = desc.transferFontData();
+    SkFontData* data = desc.detachFontData();
     if (data) {
-        SkTypeface* typeface = SkTypeface::CreateFromStream(data, desc.getFontIndex());
+        SkTypeface* typeface = SkTypeface::CreateFromFontData(data);
         if (typeface) {
             return typeface;
         }
@@ -218,6 +219,17 @@ SkStreamAsset* SkTypeface::openStream(int* ttcIndex) const {
     return this->onOpenStream(ttcIndex);
 }
 
+SkFontData* SkTypeface::createFontData() const {
+    return this->onCreateFontData();
+}
+
+// This implementation is temporary until this method can be made pure virtual.
+SkFontData* SkTypeface::onCreateFontData() const {
+    int index;
+    SkAutoTDelete<SkStreamAsset> stream(this->onOpenStream(&index));
+    return new SkFontData(stream.detach(), index, NULL, 0);
+};
+
 int SkTypeface::charsToGlyphs(const void* chars, Encoding encoding,
                               uint16_t glyphs[], int glyphCount) const {
     if (glyphCount <= 0) {