skia WIPjarred/canvas

1 files changed, 102 insertions, 0 deletions

diff --git a/src/deps/skia/include/ports/SkFontMgr_indirect.h b/src/deps/skia/include/ports/SkFontMgr_indirect.h
new file mode 100644
index 000000000..73210bc9a
--- /dev/null
+++ b/src/deps/skia/include/ports/SkFontMgr_indirect.h
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkFontMgr_indirect_DEFINED
+#define SkFontMgr_indirect_DEFINED
+
+#include "include/core/SkFontMgr.h"
+#include "include/core/SkRefCnt.h"
+#include "include/core/SkTypeface.h"
+#include "include/core/SkTypes.h"
+#include "include/ports/SkRemotableFontMgr.h"
+#include "include/private/SkMutex.h"
+#include "include/private/SkOnce.h"
+#include "include/private/SkTArray.h"
+
+class SkData;
+class SkFontStyle;
+class SkStreamAsset;
+class SkString;
+
+class SK_API SkFontMgr_Indirect : public SkFontMgr {
+public:
+    // TODO: The SkFontMgr is only used for createFromStream/File/Data.
+    // In the future these calls should be broken out into their own interface
+    // with a name like SkFontRenderer.
+    SkFontMgr_Indirect(sk_sp<SkFontMgr> impl, sk_sp<SkRemotableFontMgr> proxy)
+        : fImpl(std::move(impl)), fProxy(std::move(proxy))
+    { }
+
+protected:
+    int onCountFamilies() const override;
+    void onGetFamilyName(int index, SkString* familyName) const override;
+    SkFontStyleSet* onCreateStyleSet(int index) const override;
+
+    SkFontStyleSet* onMatchFamily(const char familyName[]) const override;
+
+    SkTypeface* onMatchFamilyStyle(const char familyName[],
+                                   const SkFontStyle& fontStyle) const override;
+
+    SkTypeface* onMatchFamilyStyleCharacter(const char familyName[],
+                                            const SkFontStyle&,
+                                            const char* bcp47[],
+                                            int bcp47Count,
+                                            SkUnichar character) const override;
+
+    sk_sp<SkTypeface> onMakeFromStreamIndex(std::unique_ptr<SkStreamAsset>, int ttcIndex) const override;
+    sk_sp<SkTypeface> onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset> stream,
+                                           const SkFontArguments& args) const override;
+    sk_sp<SkTypeface> onMakeFromFile(const char path[], int ttcIndex) const override;
+    sk_sp<SkTypeface> onMakeFromData(sk_sp<SkData>, int ttcIndex) const override;
+    sk_sp<SkTypeface> onLegacyMakeTypeface(const char familyName[], SkFontStyle) const override;
+
+private:
+    SkTypeface* createTypefaceFromFontId(const SkFontIdentity& fontId) const;
+
+    sk_sp<SkFontMgr> fImpl;
+    sk_sp<SkRemotableFontMgr> fProxy;
+
+    struct DataEntry {
+        uint32_t fDataId;  // key1
+        uint32_t fTtcIndex;  // key2
+        SkTypeface* fTypeface;  // value: weak ref to typeface
+
+        DataEntry() = default;
+
+        DataEntry(DataEntry&& that) { *this = std::move(that); }
+        DataEntry& operator=(DataEntry&& that) {
+            if (this != &that) {
+                fDataId = that.fDataId;
+                fTtcIndex = that.fTtcIndex;
+                fTypeface = that.fTypeface;
+
+                SkDEBUGCODE(that.fDataId = SkFontIdentity::kInvalidDataId;)
+                SkDEBUGCODE(that.fTtcIndex = 0xbbadbeef;)
+                that.fTypeface = nullptr;
+            }
+            return *this;
+        }
+
+        ~DataEntry() {
+            if (fTypeface) {
+                fTypeface->weak_unref();
+            }
+        }
+    };
+    /**
+     *  This cache is essentially { dataId: { ttcIndex: typeface } }
+     *  For data caching we want a mapping from data id to weak references to
+     *  typefaces with that data id. By storing the index next to the typeface,
+     *  this data cache also acts as a typeface cache.
+     */
+    mutable SkTArray<DataEntry> fDataCache;
+    mutable SkMutex fDataCacheMutex;
+
+    friend class SkStyleSet_Indirect;
+};
+
+#endif