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