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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
#include "DWriteSettings.h"
#include "mozilla/DataMutex.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/gfx/gfxVars.h"
using namespace mozilla;
using namespace mozilla::gfx;
static std::atomic<Float> sClearTypeLevel{1.0f};
static std::atomic<Float> sEnhancedContrast{1.0f};
static std::atomic<Float> sGamma{2.2f};
static Atomic<DWRITE_PIXEL_GEOMETRY> sPixelGeometry;
static Atomic<DWRITE_RENDERING_MODE> sRenderingMode;
static Atomic<DWRITE_MEASURING_MODE> sMeasuringMode;
static std::atomic<Float> sGDIGamma{1.4f};
StaticDataMutex<StaticRefPtr<IDWriteRenderingParams>> sStandardRenderingParams(
"StandardRenderingParams");
StaticDataMutex<StaticRefPtr<IDWriteRenderingParams>> sGDIRenderingParams(
"GDIRenderingParams");
static void ClearStandardRenderingParams() {
auto lockedParams = sStandardRenderingParams.Lock();
lockedParams.ref() = nullptr;
}
static void ClearGDIRenderingParams() {
auto lockedParams = sGDIRenderingParams.Lock();
lockedParams.ref() = nullptr;
}
static void UpdateClearTypeLevel() {
sClearTypeLevel = gfxVars::SystemTextClearTypeLevel();
}
static void ClearTypeLevelVarUpdated() {
UpdateClearTypeLevel();
ClearStandardRenderingParams();
ClearGDIRenderingParams();
}
static void UpdateEnhancedContrast() {
sEnhancedContrast = gfxVars::SystemTextEnhancedContrast();
}
static void EnhancedContrastVarUpdated() {
UpdateEnhancedContrast();
ClearStandardRenderingParams();
}
static void UpdateGamma() { sGamma = gfxVars::SystemTextGamma(); }
static void GammaVarUpdated() {
UpdateGamma();
ClearStandardRenderingParams();
}
static void UpdateGDIGamma() { sGDIGamma = gfxVars::SystemGDIGamma(); }
static void GDIGammaVarUpdated() {
UpdateGDIGamma();
ClearGDIRenderingParams();
}
static void UpdatePixelGeometry() {
sPixelGeometry =
static_cast<DWRITE_PIXEL_GEOMETRY>(gfxVars::SystemTextPixelGeometry());
Factory::SetBGRSubpixelOrder(sPixelGeometry == DWRITE_PIXEL_GEOMETRY_BGR);
}
static void PixelGeometryVarUpdated() {
UpdatePixelGeometry();
ClearStandardRenderingParams();
ClearGDIRenderingParams();
}
static void UpdateRenderingMode() {
sRenderingMode =
static_cast<DWRITE_RENDERING_MODE>(gfxVars::SystemTextRenderingMode());
switch (sRenderingMode) {
case DWRITE_RENDERING_MODE_ALIASED:
case DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC:
sMeasuringMode = DWRITE_MEASURING_MODE_GDI_CLASSIC;
break;
case DWRITE_RENDERING_MODE_CLEARTYPE_GDI_NATURAL:
sMeasuringMode = DWRITE_MEASURING_MODE_GDI_NATURAL;
break;
default:
sMeasuringMode = DWRITE_MEASURING_MODE_NATURAL;
break;
}
}
static void RenderingModeVarUpdated() {
UpdateRenderingMode();
ClearStandardRenderingParams();
}
DWriteSettings::DWriteSettings(bool aUseGDISettings)
: mUseGDISettings(aUseGDISettings) {}
/* static */
void DWriteSettings::Initialize() {
UpdateClearTypeLevel();
gfxVars::SetSystemTextClearTypeLevelListener(ClearTypeLevelVarUpdated);
UpdateEnhancedContrast();
gfxVars::SetSystemTextEnhancedContrastListener(EnhancedContrastVarUpdated);
UpdateGamma();
gfxVars::SetSystemTextGammaListener(GammaVarUpdated);
UpdateGDIGamma();
gfxVars::SetSystemGDIGammaListener(GDIGammaVarUpdated);
UpdateRenderingMode();
gfxVars::SetSystemTextRenderingModeListener(RenderingModeVarUpdated);
UpdatePixelGeometry();
gfxVars::SetSystemTextPixelGeometryListener(PixelGeometryVarUpdated);
}
/* static */
DWriteSettings& DWriteSettings::Get(bool aGDISettings) {
DWriteSettings* settings;
if (aGDISettings) {
static DWriteSettings* sGDISettings =
new DWriteSettings(/* aUseGDISettings */ true);
settings = sGDISettings;
} else {
static DWriteSettings* sStandardSettings =
new DWriteSettings(/* aUseGDISettings */ false);
settings = sStandardSettings;
}
return *settings;
}
Float DWriteSettings::ClearTypeLevel() { return sClearTypeLevel; }
Float DWriteSettings::EnhancedContrast() {
return mUseGDISettings ? 0.0f : sEnhancedContrast.load();
}
Float DWriteSettings::Gamma() { return mUseGDISettings ? sGDIGamma : sGamma; }
DWRITE_PIXEL_GEOMETRY DWriteSettings::PixelGeometry() { return sPixelGeometry; }
DWRITE_RENDERING_MODE DWriteSettings::RenderingMode() {
return mUseGDISettings ? DWRITE_RENDERING_MODE_GDI_CLASSIC : sRenderingMode;
}
DWRITE_MEASURING_MODE DWriteSettings::MeasuringMode() {
return mUseGDISettings ? DWRITE_MEASURING_MODE_GDI_CLASSIC : sMeasuringMode;
}
already_AddRefed<IDWriteRenderingParams> DWriteSettings::RenderingParams() {
auto lockedParams = mUseGDISettings ? sGDIRenderingParams.Lock()
: sStandardRenderingParams.Lock();
if (!lockedParams.ref()) {
RefPtr<IDWriteRenderingParams> params;
HRESULT hr = Factory::GetDWriteFactory()->CreateCustomRenderingParams(
Gamma(), EnhancedContrast(), ClearTypeLevel(), PixelGeometry(),
RenderingMode(), getter_AddRefs(params));
if (SUCCEEDED(hr)) {
lockedParams.ref() = params.forget();
} else {
gfxWarning() << "Failed to create DWrite custom rendering params.";
}
}
return do_AddRef(lockedParams.ref());
}
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