1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/gpu/GrGlyph.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,78 @@
1.4 +/*
1.5 + * Copyright 2010 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef GrGlyph_DEFINED
1.12 +#define GrGlyph_DEFINED
1.13 +
1.14 +#include "GrRect.h"
1.15 +#include "SkPath.h"
1.16 +
1.17 +class GrPlot;
1.18 +
1.19 +/* Need this to be quad-state:
1.20 + - complete w/ image
1.21 + - just metrics
1.22 + - failed to get image, but has metrics
1.23 + - failed to get metrics
1.24 + */
1.25 +struct GrGlyph {
1.26 + typedef uint32_t PackedID;
1.27 +
1.28 + GrPlot* fPlot;
1.29 + SkPath* fPath;
1.30 + PackedID fPackedID;
1.31 + GrIRect16 fBounds;
1.32 + GrIPoint16 fAtlasLocation;
1.33 +
1.34 + void init(GrGlyph::PackedID packed, const SkIRect& bounds) {
1.35 + fPlot = NULL;
1.36 + fPath = NULL;
1.37 + fPackedID = packed;
1.38 + fBounds.set(bounds);
1.39 + fAtlasLocation.set(0, 0);
1.40 + }
1.41 +
1.42 + void free() {
1.43 + if (fPath) {
1.44 + delete fPath;
1.45 + fPath = NULL;
1.46 + }
1.47 + }
1.48 +
1.49 + int width() const { return fBounds.width(); }
1.50 + int height() const { return fBounds.height(); }
1.51 + bool isEmpty() const { return fBounds.isEmpty(); }
1.52 + uint16_t glyphID() const { return UnpackID(fPackedID); }
1.53 +
1.54 + ///////////////////////////////////////////////////////////////////////////
1.55 +
1.56 + static inline unsigned ExtractSubPixelBitsFromFixed(GrFixed pos) {
1.57 + // two most significant fraction bits from fixed-point
1.58 + return (pos >> 14) & 3;
1.59 + }
1.60 +
1.61 + static inline PackedID Pack(uint16_t glyphID, GrFixed x, GrFixed y) {
1.62 + x = ExtractSubPixelBitsFromFixed(x);
1.63 + y = ExtractSubPixelBitsFromFixed(y);
1.64 + return (x << 18) | (y << 16) | glyphID;
1.65 + }
1.66 +
1.67 + static inline GrFixed UnpackFixedX(PackedID packed) {
1.68 + return ((packed >> 18) & 3) << 14;
1.69 + }
1.70 +
1.71 + static inline GrFixed UnpackFixedY(PackedID packed) {
1.72 + return ((packed >> 16) & 3) << 14;
1.73 + }
1.74 +
1.75 + static inline uint16_t UnpackID(PackedID packed) {
1.76 + return (uint16_t)packed;
1.77 + }
1.78 +};
1.79 +
1.80 +
1.81 +#endif
