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// 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 "content/renderer/render_view_impl.h"
#include "third_party/blink/public/mojom/renderer_preferences.mojom.h"
#include "third_party/blink/public/platform/web_font_render_style.h"
#include "third_party/skia/include/core/SkFontLCDConfig.h"
#include "ui/gfx/font_render_params.h"
using blink::WebFontRenderStyle;
namespace content {
namespace {
SkFontHinting RendererPreferencesToSkiaHinting(
const blink::mojom::RendererPreferences& prefs) {
if (!prefs.should_antialias_text) {
// When anti-aliasing is off, GTK maps all non-zero hinting settings to
// 'Normal' hinting so we do the same. Otherwise, folks who have 'Slight'
// hinting selected will see readable text in everything expect Chromium.
switch (prefs.hinting) {
case gfx::FontRenderParams::HINTING_NONE:
return SkFontHinting::kNone;
case gfx::FontRenderParams::HINTING_SLIGHT:
case gfx::FontRenderParams::HINTING_MEDIUM:
case gfx::FontRenderParams::HINTING_FULL:
return SkFontHinting::kNormal;
default:
NOTREACHED();
return SkFontHinting::kNormal;
}
}
switch (prefs.hinting) {
case gfx::FontRenderParams::HINTING_NONE:
return SkFontHinting::kNone;
case gfx::FontRenderParams::HINTING_SLIGHT:
return SkFontHinting::kSlight;
case gfx::FontRenderParams::HINTING_MEDIUM:
return SkFontHinting::kNormal;
case gfx::FontRenderParams::HINTING_FULL:
return SkFontHinting::kFull;
default:
NOTREACHED();
return SkFontHinting::kNormal;
}
}
} // namespace
void RenderViewImpl::UpdateFontRenderingFromRendererPrefs() {
const blink::mojom::RendererPreferences& prefs = renderer_preferences_;
WebFontRenderStyle::SetHinting(RendererPreferencesToSkiaHinting(prefs));
WebFontRenderStyle::SetAutoHint(prefs.use_autohinter);
WebFontRenderStyle::SetUseBitmaps(prefs.use_bitmaps);
SkFontLCDConfig::SetSubpixelOrder(
gfx::FontRenderParams::SubpixelRenderingToSkiaLCDOrder(
prefs.subpixel_rendering));
SkFontLCDConfig::SetSubpixelOrientation(
gfx::FontRenderParams::SubpixelRenderingToSkiaLCDOrientation(
prefs.subpixel_rendering));
WebFontRenderStyle::SetAntiAlias(prefs.should_antialias_text);
WebFontRenderStyle::SetSubpixelRendering(
prefs.subpixel_rendering !=
gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE);
WebFontRenderStyle::SetSubpixelPositioning(prefs.use_subpixel_positioning);
#if !defined(OS_ANDROID)
if (!prefs.system_font_family_name.empty()) {
WebFontRenderStyle::SetSystemFontFamily(
blink::WebString::FromUTF8(prefs.system_font_family_name));
}
#endif
}
} // namespace content
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