API modifications needed to upstream Android font changes.

R=reed@google.com

Author: djsollen@google.com

Review URL: https://chromiumcodereview.appspot.com/14761003

git-svn-id: http://skia.googlecode.com/svn/trunk@9083 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 118 insertions, 0 deletions

diff --git a/include/core/SkPaintOptionsAndroid.h b/include/core/SkPaintOptionsAndroid.h
new file mode 100644
index 0000000000..235cae9a0a
--- /dev/null
+++ b/include/core/SkPaintOptionsAndroid.h
@@ -0,0 +1,118 @@
+
+/*
+ * Copyright 2012 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#ifndef SkPaintOptionsAndroid_DEFINED
+#define SkPaintOptionsAndroid_DEFINED
+
+#ifdef SK_BUILD_FOR_ANDROID
+
+#include "SkString.h"
+#include "SkTypes.h"
+
+class SkFlattenableReadBuffer;
+class SkFlattenableWriteBuffer;
+
+struct SkLanguageInfo {
+    SkLanguageInfo(const char* tag) : fTag(tag) { }
+    SkString fTag; //! BCP 47 language identifier
+};
+
+/** \class SkLanguage
+
+    The SkLanguage class represents a human written language, and is used by
+    text draw operations to determine which glyph to draw when drawing
+    characters with variants (ie Han-derived characters).
+*/
+class SkLanguage {
+public:
+    SkLanguage() : fInfo(getInfo("")) { }
+    SkLanguage(const char* tag) : fInfo(getInfo(tag)) { }
+    SkLanguage(const SkLanguage& b) : fInfo(b.fInfo) { }
+
+    /** Gets a BCP 47 language identifier for this SkLanguage.
+        @return a BCP 47 language identifier representing this language
+    */
+    const SkString& getTag() const { return fInfo->fTag; }
+
+    /** Performs BCP 47 fallback to return an SkLanguage one step more general.
+        @return an SkLanguage one step more general
+    */
+    SkLanguage getParent() const;
+
+    bool operator==(const SkLanguage& b) const {
+        return fInfo == b.fInfo;
+    }
+    bool operator!=(const SkLanguage& b) const {
+        return fInfo != b.fInfo;
+    }
+    bool operator<(const SkLanguage& b) const {
+        return fInfo < b.fInfo;
+    }
+    bool operator>(const SkLanguage& b) const {
+        return fInfo > b.fInfo;
+    }
+    SkLanguage& operator=(const SkLanguage& b) {
+        fInfo = b.fInfo;
+        return *this;
+    }
+
+private:
+    const SkLanguageInfo* fInfo;
+
+    static const SkLanguageInfo* getInfo(const char* tag);
+};
+
+class SkPaintOptionsAndroid {
+public:
+    SkPaintOptionsAndroid() {
+        fFontVariant = kDefault_Variant;
+    }
+
+    /** Return the paint's language value used for drawing text.
+        @return the paint's language value used for drawing text.
+    */
+    const SkLanguage& getLanguage() const { return fLanguage; }
+
+    /** Set the paint's language value used for drawing text.
+        @param language set the paint's language value for drawing text.
+    */
+    void setLanguage(const SkLanguage& language) { fLanguage = language; }
+    void setLanguage(const char* languageTag) { fLanguage = SkLanguage(languageTag); }
+
+
+    enum FontVariant {
+       kDefault_Variant, // Currently setting yourself to Default gives you Compact Variant
+       kCompact_Variant,
+       kElegant_Variant,
+       kLast_Variant = kElegant_Variant,
+    };
+
+    /** Return the font variant
+        @return the font variant used by this paint object
+    */
+    FontVariant getFontVariant() const { return fFontVariant; }
+
+    /** Set the font variant
+      @param fontVariant set the paint's font variant for choosing fonts
+    */
+    void setFontVariant(FontVariant fontVariant) {
+        SkASSERT((unsigned)fontVariant <= kLast_Variant);
+        fFontVariant = fontVariant;
+    }
+
+    void flatten(SkFlattenableWriteBuffer&) const;
+    void unflatten(SkFlattenableReadBuffer&);
+
+private:
+    SkLanguage fLanguage;
+    FontVariant fFontVariant;
+};
+
+#endif // #ifdef SK_BUILD_FOR_ANDROID
+#endif // #ifndef SkPaintOptionsAndroid_DEFINED