gecko-dev/gfx/2d/HelpersWinFonts.h

77 строки
1.7 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 http://mozilla.org/MPL/2.0/. */
#include "gfxPrefs.h"
namespace mozilla {
namespace gfx {
extern BYTE sSystemTextQuality;
static BYTE
GetSystemTextQuality()
{
return sSystemTextQuality;
}
// Cleartype can be dynamically enabled/disabled, so we have to allow for dynamically
// updating it.
static void
UpdateSystemTextQuality()
{
BOOL font_smoothing;
UINT smoothing_type;
if (!SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &font_smoothing, 0)) {
sSystemTextQuality = DEFAULT_QUALITY;
return;
}
if (font_smoothing) {
if (!SystemParametersInfo(SPI_GETFONTSMOOTHINGTYPE,
0, &smoothing_type, 0)) {
sSystemTextQuality = DEFAULT_QUALITY;
return;
}
if (smoothing_type == FE_FONTSMOOTHINGCLEARTYPE) {
sSystemTextQuality = CLEARTYPE_QUALITY;
return;
}
sSystemTextQuality = ANTIALIASED_QUALITY;
return;
}
sSystemTextQuality = DEFAULT_QUALITY;
}
static AntialiasMode
GetSystemDefaultAAMode()
{
AntialiasMode defaultMode = AntialiasMode::SUBPIXEL;
if (gfxPrefs::DisableAllTextAA()) {
return AntialiasMode::NONE;
}
switch (GetSystemTextQuality()) {
case CLEARTYPE_QUALITY:
defaultMode = AntialiasMode::SUBPIXEL;
break;
case ANTIALIASED_QUALITY:
defaultMode = AntialiasMode::GRAY;
break;
case DEFAULT_QUALITY:
defaultMode = AntialiasMode::NONE;
break;
}
return defaultMode;
}
} // namespace gfx
} // namespace mozilla