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/*
* 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 "GrRect.h"
#include "GrTypes.h"
#include "SkChecksum.h"
#include "SkPath.h"
class GrPlot;
/* 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;
GrPlot* fPlot;
SkPath* fPath;
PackedID fPackedID;
GrMaskFormat fMaskFormat;
GrIRect16 fBounds;
SkIPoint16 fAtlasLocation;
void init(GrGlyph::PackedID packed, const SkIRect& bounds, GrMaskFormat format) {
fPlot = NULL;
fPath = NULL;
fPackedID = packed;
fBounds.set(bounds);
fMaskFormat = format;
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(SkFixed pos) {
// two most significant fraction bits from fixed-point
return (pos >> 14) & 3;
}
static inline PackedID Pack(uint16_t glyphID, SkFixed x, SkFixed y) {
x = ExtractSubPixelBitsFromFixed(x);
y = ExtractSubPixelBitsFromFixed(y);
return (x << 18) | (y << 16) | glyphID;
}
static inline SkFixed UnpackFixedX(PackedID packed) {
return ((packed >> 18) & 3) << 14;
}
static inline SkFixed UnpackFixedY(PackedID packed) {
return ((packed >> 16) & 3) << 14;
}
static inline uint16_t UnpackID(PackedID packed) {
return (uint16_t)packed;
}
static inline const GrGlyph::PackedID& GetKey(const GrGlyph& glyph) {
return glyph.fPackedID;
}
static inline uint32_t Hash(GrGlyph::PackedID key) {
return SkChecksum::Murmur3(&key, sizeof(key));
}
};
#endif
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