blob: 01c90244881dbd5e8db63543f1f219cedb1a1e32 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/font_render_params.h"
#include "base/macros.h"
#include "base/no_destructor.h"
#include "base/notreached.h"
namespace gfx {
namespace {
// Returns the system's default settings.
FontRenderParams LoadDefaults() {
FontRenderParams params;
params.antialiasing = true;
params.autohinter = true;
params.use_bitmaps = true;
params.subpixel_rendering = FontRenderParams::SUBPIXEL_RENDERING_NONE;
// Use subpixel text positioning to keep consistent character spacing when
// the page is scaled by a fractional factor.
params.subpixel_positioning = true;
// Slight hinting renders much better than normal hinting on Android.
params.hinting = FontRenderParams::HINTING_SLIGHT;
return params;
// A device scale factor used to determine if subpixel positioning
// should be used.
float device_scale_factor_ = 1.0f;
} // namespace
FontRenderParams GetFontRenderParams(const FontRenderParamsQuery& query,
std::string* family_out) {
if (family_out)
// Customized font rendering settings are not supported, only defaults.
static const base::NoDestructor<gfx::FontRenderParams> params(LoadDefaults());
return *params;
float GetFontRenderParamsDeviceScaleFactor() {
return device_scale_factor_;
void SetFontRenderParamsDeviceScaleFactor(float device_scale_factor) {
device_scale_factor_ = device_scale_factor;
} // namespace gfx