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| 1 /* |
| 2 * Copyright 2014 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #ifndef SkSurfaceProps_DEFINED |
| 9 #define SkSurfaceProps_DEFINED |
| 10 |
| 11 #include "SkTypes.h" |
| 12 |
| 13 /** |
| 14 * Description of how the LCD strips are arranged for each pixel. If this is un
known, or the |
| 15 * pixels are meant to be "portable" and/or transformed before showing (e.g. ro
tated, scaled) |
| 16 * then use kUnknown_SkPixelGeometry. |
| 17 */ |
| 18 enum SkPixelGeometry { |
| 19 kUnknown_SkPixelGeometry, |
| 20 kRGB_H_SkPixelGeometry, |
| 21 kBGR_H_SkPixelGeometry, |
| 22 kRGB_V_SkPixelGeometry, |
| 23 kBGR_V_SkPixelGeometry, |
| 24 }; |
| 25 |
| 26 // Returns true iff geo is a known geometry and is RGB. |
| 27 static inline bool SkPixelGeometryIsRGB(SkPixelGeometry geo) { |
| 28 return kRGB_H_SkPixelGeometry == geo || kRGB_V_SkPixelGeometry == geo; |
| 29 } |
| 30 |
| 31 // Returns true iff geo is a known geometry and is BGR. |
| 32 static inline bool SkPixelGeometryIsBGR(SkPixelGeometry geo) { |
| 33 return kBGR_H_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo; |
| 34 } |
| 35 |
| 36 // Returns true iff geo is a known geometry and is horizontal. |
| 37 static inline bool SkPixelGeometryIsH(SkPixelGeometry geo) { |
| 38 return kRGB_H_SkPixelGeometry == geo || kBGR_H_SkPixelGeometry == geo; |
| 39 } |
| 40 |
| 41 // Returns true iff geo is a known geometry and is vertical. |
| 42 static inline bool SkPixelGeometryIsV(SkPixelGeometry geo) { |
| 43 return kRGB_V_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo; |
| 44 } |
| 45 |
| 46 /** |
| 47 * Describes properties and constraints of a given SkSurface. The rendering eng
ine can parse these |
| 48 * during drawing, and can sometimes optimize its performance (e.g. disabling a
n expensive |
| 49 * feature). |
| 50 */ |
| 51 class SkSurfaceProps { |
| 52 public: |
| 53 enum Flags { |
| 54 kDisallowAntiAlias_Flag = 1 << 0, |
| 55 kDisallowDither_Flag = 1 << 1, |
| 56 kUseDistanceFieldFonts_Flag = 1 << 2, |
| 57 }; |
| 58 SkSurfaceProps(uint32_t flags, SkPixelGeometry); |
| 59 |
| 60 enum InitType { |
| 61 kLegacyFontHost_InitType |
| 62 }; |
| 63 SkSurfaceProps(InitType); |
| 64 SkSurfaceProps(uint32_t flags, InitType); |
| 65 |
| 66 uint32_t flags() const { return fFlags; } |
| 67 SkPixelGeometry pixelGeometry() const { return fPixelGeometry; } |
| 68 |
| 69 bool isDisallowAA() const { return SkToBool(fFlags & kDisallowAntiAlias_Flag
); } |
| 70 bool isDisallowDither() const { return SkToBool(fFlags & kDisallowDither_Fla
g); } |
| 71 bool isUseDistanceFieldFonts() const { return SkToBool(fFlags & kUseDistance
FieldFonts_Flag); } |
| 72 |
| 73 private: |
| 74 SkSurfaceProps(); |
| 75 |
| 76 uint32_t fFlags; |
| 77 SkPixelGeometry fPixelGeometry; |
| 78 }; |
| 79 |
| 80 #endif |
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