michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "SkDeviceProfile.h"
michael@0: #include "SkThread.h"
michael@0: 
michael@0: #define DEFAULT_GAMMAEXP        2.2f
michael@0: #define DEFAULT_CONTRASTSCALE   0.5f
michael@0: #define DEFAULT_LCDCONFIG       SkDeviceProfile::kNone_LCDConfig
michael@0: #define DEFAULT_FONTHINTLEVEL   SkDeviceProfile::kSlight_FontHintLevel
michael@0: 
michael@0: static float pin(float value, float min, float max) {
michael@0:     if (value < min) {
michael@0:         value = min;
michael@0:     } else if (value > max) {
michael@0:         value = max;
michael@0:     }
michael@0:     return value;
michael@0: }
michael@0: 
michael@0: SkDeviceProfile::SkDeviceProfile(float gammaExp, float contrast,
michael@0:                                  LCDConfig config, FontHintLevel level) {
michael@0:     fGammaExponent = pin(gammaExp, 0, 10);
michael@0:     fContrastScale = pin(contrast, 0, 1);
michael@0:     fLCDConfig = config;
michael@0:     fFontHintLevel = level;
michael@0: }
michael@0: 
michael@0: void SkDeviceProfile::generateTableForLuminanceByte(U8CPU lumByte,
michael@0:                                                     uint8_t table[256]) const {
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkDeviceProfile* SkDeviceProfile::Create(float gammaExp,
michael@0:                                          float contrast,
michael@0:                                          LCDConfig config,
michael@0:                                          FontHintLevel level) {
michael@0:     return SkNEW_ARGS(SkDeviceProfile, (gammaExp, contrast, config, level));
michael@0: }
michael@0: 
michael@0: SK_DECLARE_STATIC_MUTEX(gMutex);
michael@0: static SkDeviceProfile* gDefaultProfile;
michael@0: static SkDeviceProfile* gGlobalProfile;
michael@0: 
michael@0: SkDeviceProfile* SkDeviceProfile::GetDefault() {
michael@0:     SkAutoMutexAcquire amc(gMutex);
michael@0: 
michael@0:     if (NULL == gDefaultProfile) {
michael@0:         gDefaultProfile = SkDeviceProfile::Create(DEFAULT_GAMMAEXP,
michael@0:                                                   DEFAULT_CONTRASTSCALE,
michael@0:                                                   DEFAULT_LCDCONFIG,
michael@0:                                                   DEFAULT_FONTHINTLEVEL);
michael@0:     }
michael@0:     return gDefaultProfile;
michael@0: }
michael@0: 
michael@0: SkDeviceProfile* SkDeviceProfile::RefGlobal() {
michael@0:     SkAutoMutexAcquire amc(gMutex);
michael@0: 
michael@0:     if (NULL == gGlobalProfile) {
michael@0:         gGlobalProfile = SkDeviceProfile::GetDefault();
michael@0:     }
michael@0:     gGlobalProfile->ref();
michael@0:     return gGlobalProfile;
michael@0: }
michael@0: 
michael@0: void SkDeviceProfile::SetGlobal(SkDeviceProfile* profile) {
michael@0:     SkAutoMutexAcquire amc(gMutex);
michael@0: 
michael@0:     SkRefCnt_SafeAssign(gGlobalProfile, profile);
michael@0: }