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comparison: gfx/skia/trunk/src/core/SkDeviceProfile.h
gfx/skia/trunk/src/core/SkDeviceProfile.h
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- TOR_BUG_3246
- changeset 5
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| -1:000000000000 | 0:99715825a62a |
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| 1 /* | |
| 2 * Copyright 2012 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 SkDeviceProfile_DEFINED | |
| 9 #define SkDeviceProfile_DEFINED | |
| 10 | |
| 11 #include "SkRefCnt.h" | |
| 12 | |
| 13 class SkDeviceProfile : public SkRefCnt { | |
| 14 public: | |
| 15 SK_DECLARE_INST_COUNT(SkDeviceProfile) | |
| 16 | |
| 17 enum LCDConfig { | |
| 18 kNone_LCDConfig, // disables LCD text rendering, uses A8 instead | |
| 19 kRGB_Horizontal_LCDConfig, | |
| 20 kBGR_Horizontal_LCDConfig, | |
| 21 kRGB_Vertical_LCDConfig, | |
| 22 kBGR_Vertical_LCDConfig | |
| 23 }; | |
| 24 | |
| 25 enum FontHintLevel { | |
| 26 kNone_FontHintLevel, | |
| 27 kSlight_FontHintLevel, | |
| 28 kNormal_FontHintLevel, | |
| 29 kFull_FontHintLevel, | |
| 30 kAuto_FontHintLevel | |
| 31 }; | |
| 32 | |
| 33 /** | |
| 34 * gammaExp is typically between 1.0 and 2.2. For no gamma adjustment, | |
| 35 * specify 1.0 | |
| 36 * | |
| 37 * contrastScale will be pinned between 0.0 and 1.0. For no contrast | |
| 38 * adjustment, specify 0.0 | |
| 39 * | |
| 40 * @param config Describes the LCD layout for this device. If this is set | |
| 41 * to kNone, then all requests for LCD text will be | |
| 42 * devolved to A8 antialiasing. | |
| 43 * | |
| 44 * @param level The hinting level to be used, IF the paint specifies | |
| 45 * "default". Otherwise the paint's hinting level will be | |
| 46 * respected. | |
| 47 */ | |
| 48 static SkDeviceProfile* Create(float gammaExp, | |
| 49 float contrastScale, | |
| 50 LCDConfig, | |
| 51 FontHintLevel); | |
| 52 | |
| 53 /** | |
| 54 * Returns the global default profile, that is used if no global profile is | |
| 55 * specified with SetGlobal(), or if NULL is specified to SetGlobal(). | |
| 56 * The references count is *not* incremented, and the caller should not | |
| 57 * call unref(). | |
| 58 */ | |
| 59 static SkDeviceProfile* GetDefault(); | |
| 60 | |
| 61 /** | |
| 62 * Return the current global profile (or the default if no global had yet | |
| 63 * been set) and increment its reference count. The call *must* call unref() | |
| 64 * when it is done using it. | |
| 65 */ | |
| 66 static SkDeviceProfile* RefGlobal(); | |
| 67 | |
| 68 /** | |
| 69 * Make the specified profile be the global value for all subsequently | |
| 70 * instantiated devices. Does not affect any existing devices. | |
| 71 * Increments the reference count on the profile. | |
| 72 * Specify NULL for the "identity" profile (where there is no gamma or | |
| 73 * contrast correction). | |
| 74 */ | |
| 75 static void SetGlobal(SkDeviceProfile*); | |
| 76 | |
| 77 float getFontGammaExponent() const { return fGammaExponent; } | |
| 78 float getFontContrastScale() const { return fContrastScale; } | |
| 79 | |
| 80 /** | |
| 81 * Given a luminance byte (0 for black, 0xFF for white), generate a table | |
| 82 * that applies the gamma/contrast settings to linear coverage values. | |
| 83 */ | |
| 84 void generateTableForLuminanceByte(U8CPU lumByte, uint8_t table[256]) const; | |
| 85 | |
| 86 private: | |
| 87 SkDeviceProfile(float gammaExp, float contrastScale, LCDConfig, | |
| 88 FontHintLevel); | |
| 89 | |
| 90 float fGammaExponent; | |
| 91 float fContrastScale; | |
| 92 LCDConfig fLCDConfig; | |
| 93 FontHintLevel fFontHintLevel; | |
| 94 | |
| 95 typedef SkRefCnt INHERITED; | |
| 96 }; | |
| 97 | |
| 98 #endif |
