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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/public/platform/web_font_render_style.h"
#include "build/build_config.h"
#include "third_party/blink/renderer/platform/fonts/font_cache.h"
#include "third_party/blink/renderer/platform/fonts/font_description.h"
#include "third_party/blink/renderer/platform/web_test_support.h"
#include "third_party/skia/include/core/SkFont.h"
namespace blink {
namespace {
SkFontHinting g_skia_hinting = SkFontHinting::kNormal;
bool g_use_skia_auto_hint = true;
bool g_use_skia_bitmaps = true;
bool g_use_skia_anti_alias = true;
bool g_use_skia_subpixel_rendering = false;
} // namespace
// static
void WebFontRenderStyle::SetSkiaFontManager(sk_sp<SkFontMgr> font_mgr) {
FontCache::SetFontManager(std::move(font_mgr));
}
// static
void WebFontRenderStyle::SetHinting(SkFontHinting hinting) {
g_skia_hinting = hinting;
}
// static
void WebFontRenderStyle::SetAutoHint(bool use_auto_hint) {
g_use_skia_auto_hint = use_auto_hint;
}
// static
void WebFontRenderStyle::SetUseBitmaps(bool use_bitmaps) {
g_use_skia_bitmaps = use_bitmaps;
}
// static
void WebFontRenderStyle::SetAntiAlias(bool use_anti_alias) {
g_use_skia_anti_alias = use_anti_alias;
}
// static
void WebFontRenderStyle::SetSubpixelRendering(bool use_subpixel_rendering) {
g_use_skia_subpixel_rendering = use_subpixel_rendering;
}
// static
void WebFontRenderStyle::SetSubpixelPositioning(bool use_subpixel_positioning) {
FontDescription::SetSubpixelPositioning(use_subpixel_positioning);
}
// static
void WebFontRenderStyle::SetSystemFontFamily(const WebString& name) {
FontCache::SetSystemFontFamily(name);
}
// static
WebFontRenderStyle WebFontRenderStyle::GetDefault() {
WebFontRenderStyle result;
result.hint_style = static_cast<char>(g_skia_hinting);
result.use_bitmaps = g_use_skia_bitmaps;
result.use_auto_hint = g_use_skia_auto_hint;
result.use_anti_alias = g_use_skia_anti_alias;
result.use_subpixel_rendering = g_use_skia_subpixel_rendering;
result.use_subpixel_positioning = FontDescription::SubpixelPositioning();
return result;
}
void WebFontRenderStyle::OverrideWith(const WebFontRenderStyle& other) {
if (other.use_anti_alias != WebFontRenderStyle::kNoPreference)
use_anti_alias = other.use_anti_alias;
if (other.use_hinting != WebFontRenderStyle::kNoPreference) {
use_hinting = other.use_hinting;
hint_style = other.hint_style;
}
if (other.use_bitmaps != WebFontRenderStyle::kNoPreference)
use_bitmaps = other.use_bitmaps;
if (other.use_auto_hint != WebFontRenderStyle::kNoPreference)
use_auto_hint = other.use_auto_hint;
if (other.use_anti_alias != WebFontRenderStyle::kNoPreference)
use_anti_alias = other.use_anti_alias;
if (other.use_subpixel_rendering != WebFontRenderStyle::kNoPreference)
use_subpixel_rendering = other.use_subpixel_rendering;
if (other.use_subpixel_positioning != WebFontRenderStyle::kNoPreference)
use_subpixel_positioning = other.use_subpixel_positioning;
}
void WebFontRenderStyle::ApplyToSkFont(SkFont* font) const {
auto sk_hint_style = static_cast<SkFontHinting>(hint_style);
font->setHinting(sk_hint_style);
font->setEmbeddedBitmaps(use_bitmaps);
font->setForceAutoHinting(use_auto_hint);
if (use_anti_alias && use_subpixel_rendering) {
font->setEdging(SkFont::Edging::kSubpixelAntiAlias);
} else if (use_anti_alias) {
font->setEdging(SkFont::Edging::kAntiAlias);
} else {
font->setEdging(SkFont::Edging::kAlias);
}
// Force-enable subpixel positioning, except when full hinting is requested
// or when running web tests.
bool force_subpixel_positioning = !WebTestSupport::IsRunningWebTest() &&
sk_hint_style != SkFontHinting::kFull;
font->setSubpixel(force_subpixel_positioning || use_subpixel_positioning);
font->setLinearMetrics(use_subpixel_positioning == 1);
}
} // namespace blink
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