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