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// Copyright (c) 2009 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 "chrome/renderer/render_view.h"
#include "chrome/common/renderer_preferences.h"
#include "third_party/WebKit/WebKit/chromium/public/linux/WebFontRendering.h"
using WebKit::WebFontRendering;
static SkPaint::Hinting RendererPreferencesToSkiaHinting(
const 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 RENDERER_PREFERENCES_HINTING_NONE:
return SkPaint::kNo_Hinting;
case RENDERER_PREFERENCES_HINTING_SYSTEM_DEFAULT:
case RENDERER_PREFERENCES_HINTING_SLIGHT:
case RENDERER_PREFERENCES_HINTING_MEDIUM:
case RENDERER_PREFERENCES_HINTING_FULL:
return SkPaint::kNormal_Hinting;
default:
NOTREACHED();
return SkPaint::kNormal_Hinting;
}
}
switch (prefs.hinting) {
case RENDERER_PREFERENCES_HINTING_SYSTEM_DEFAULT:
return SkPaint::kNormal_Hinting;
case RENDERER_PREFERENCES_HINTING_NONE:
return SkPaint::kNo_Hinting;
case RENDERER_PREFERENCES_HINTING_SLIGHT:
return SkPaint::kSlight_Hinting;
case RENDERER_PREFERENCES_HINTING_MEDIUM:
return SkPaint::kNormal_Hinting;
case RENDERER_PREFERENCES_HINTING_FULL:
return SkPaint::kFull_Hinting;
default:
NOTREACHED();
return SkPaint::kNormal_Hinting;
}
}
static SkFontHost::LCDOrder RendererPreferencesToSkiaLCDOrder(
RendererPreferencesSubpixelRenderingEnum subpixel) {
switch (subpixel) {
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_SYSTEM_DEFAULT:
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_NONE:
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_RGB:
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_VRGB:
return SkFontHost::kRGB_LCDOrder;
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_BGR:
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_VBGR:
return SkFontHost::kBGR_LCDOrder;
default:
NOTREACHED();
return SkFontHost::kRGB_LCDOrder;
}
}
static SkFontHost::LCDOrientation
RendererPreferencesToSkiaLCDOrientation(
RendererPreferencesSubpixelRenderingEnum subpixel) {
switch (subpixel) {
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_SYSTEM_DEFAULT:
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_NONE:
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_RGB:
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_BGR:
return SkFontHost::kHorizontal_LCDOrientation;
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_VRGB:
case RENDERER_PREFERENCES_SUBPIXEL_RENDERING_VBGR:
return SkFontHost::kVertical_LCDOrientation;
default:
NOTREACHED();
return SkFontHost::kHorizontal_LCDOrientation;
}
}
static bool RendererPreferencesToAntiAliasFlag(
const RendererPreferences& prefs) {
return prefs.should_antialias_text;
}
static bool RendererPreferencesToSubpixelGlyphsFlag(
const RendererPreferences& prefs) {
if (prefs.subpixel_rendering !=
RENDERER_PREFERENCES_SUBPIXEL_RENDERING_SYSTEM_DEFAULT &&
prefs.subpixel_rendering !=
RENDERER_PREFERENCES_SUBPIXEL_RENDERING_NONE) {
return true;
}
return false;
}
void RenderView::UpdateFontRenderingFromRendererPrefs() {
const RendererPreferences& prefs = renderer_preferences_;
WebFontRendering::setHinting(
RendererPreferencesToSkiaHinting(prefs));
WebFontRendering::setLCDOrder(
RendererPreferencesToSkiaLCDOrder(prefs.subpixel_rendering));
WebFontRendering::setLCDOrientation(
RendererPreferencesToSkiaLCDOrientation(prefs.subpixel_rendering));
WebFontRendering::setAntiAlias(RendererPreferencesToAntiAliasFlag(prefs));
WebFontRendering::setSubpixelGlyphs(
RendererPreferencesToSubpixelGlyphsFlag(prefs));
}
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