| /* |
| * 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 "GrDrawOpAtlas.h" |
| #include "GrRect.h" |
| #include "GrTypes.h" |
| |
| #include "SkChecksum.h" |
| #include "SkFixed.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 { |
| enum MaskStyle { |
| kCoverage_MaskStyle, |
| kDistance_MaskStyle |
| }; |
| |
| typedef uint32_t PackedID; |
| |
| GrDrawOpAtlas::AtlasID fID; |
| SkPath* fPath; |
| PackedID fPackedID; |
| GrMaskFormat fMaskFormat; |
| GrIRect16 fBounds; |
| SkIPoint16 fAtlasLocation; |
| bool fTooLargeForAtlas; |
| |
| void init(GrGlyph::PackedID packed, const SkIRect& bounds, GrMaskFormat format) { |
| fID = GrDrawOpAtlas::kInvalidAtlasID; |
| fPath = nullptr; |
| fPackedID = packed; |
| fBounds.set(bounds); |
| fMaskFormat = format; |
| fAtlasLocation.set(0, 0); |
| fTooLargeForAtlas = GrDrawOpAtlas::GlyphTooLargeForAtlas(bounds.width(), bounds.height()); |
| } |
| |
| void reset() { |
| if (fPath) { |
| delete fPath; |
| fPath = nullptr; |
| } |
| } |
| |
| 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 bool Fits(const SkIRect& bounds) { |
| return SkTFitsIn<int16_t>(bounds.fLeft) && |
| SkTFitsIn<int16_t>(bounds.fTop) && |
| SkTFitsIn<int16_t>(bounds.fRight) && |
| SkTFitsIn<int16_t>(bounds.fBottom); |
| } |
| |
| 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, MaskStyle ms) { |
| x = ExtractSubPixelBitsFromFixed(x); |
| y = ExtractSubPixelBitsFromFixed(y); |
| int dfFlag = (ms == kDistance_MaskStyle) ? 0x1 : 0x0; |
| return (dfFlag << 20) | (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 MaskStyle UnpackMaskStyle(PackedID packed) { |
| return ((packed >> 20) & 1) ? kDistance_MaskStyle : kCoverage_MaskStyle; |
| } |
| |
| 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::Mix(key); |
| } |
| }; |
| |
| #endif |