1 files changed, 82 insertions, 0 deletions
diff --git a/include/gpu/GrGlyph.h b/include/gpu/GrGlyph.h
new file mode 100644
index 0000000..a0d81a1
--- /dev/null
+++ b/include/gpu/GrGlyph.h
@@ -0,0 +1,82 @@
+
+/*
+ * Copyright 2010 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+
+#ifndef GrGlyph_DEFINED
+#define GrGlyph_DEFINED
+
+#include "GrPath.h"
+#include "GrRect.h"
+
+class GrAtlas;
+
+/*  Need this to be quad-state:
+    - complete w/ image
+    - just metrics
+    - failed to get image, but has metrics
+    - failed to get metrics
+ */
+struct GrGlyph {
+    typedef uint32_t PackedID;
+
+    GrAtlas*    fAtlas;
+    GrPath*     fPath;
+    PackedID    fPackedID;
+    GrIRect16   fBounds;
+    GrIPoint16  fAtlasLocation;
+
+    void init(GrGlyph::PackedID packed, const GrIRect& bounds) {
+        fAtlas = NULL;
+        fPath = NULL;
+        fPackedID = packed;
+        fBounds.set(bounds);
+        fAtlasLocation.set(0, 0);
+    }
+    
+    void free() {
+        if (fPath) {
+            delete fPath;
+            fPath = NULL;
+        }
+    }
+    
+    int width() const { return fBounds.width(); }
+    int height() const { return fBounds.height(); }
+    bool isEmpty() const { return fBounds.isEmpty(); }
+    uint16_t glyphID() const { return UnpackID(fPackedID); }
+
+    ///////////////////////////////////////////////////////////////////////////
+    
+    static inline unsigned ExtractSubPixelBitsFromFixed(GrFixed pos) {
+        // two most significant fraction bits from fixed-point
+        return (pos >> 14) & 3;
+    }
+    
+    static inline PackedID Pack(uint16_t glyphID, GrFixed x, GrFixed y) {
+        x = ExtractSubPixelBitsFromFixed(x);
+        y = ExtractSubPixelBitsFromFixed(y);
+        return (x << 18) | (y << 16) | glyphID;
+    }
+    
+    static inline GrFixed UnpackFixedX(PackedID packed) {
+        return ((packed >> 18) & 3) << 14;
+    }
+    
+    static inline GrFixed UnpackFixedY(PackedID packed) {
+        return ((packed >> 16) & 3) << 14;
+    }
+    
+    static inline uint16_t UnpackID(PackedID packed) {
+        return (uint16_t)packed;
+    }
+};
+
+
+#endif
+