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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 "content/public/common/renderer_preferences.h"
#include "third_party/WebKit/public/web/linux/WebFontRendering.h"
using blink::WebFontRendering;
namespace content {
namespace {
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 gfx::FontRenderParams::HINTING_NONE:
return SkPaint::kNo_Hinting;
case gfx::FontRenderParams::HINTING_SLIGHT:
case gfx::FontRenderParams::HINTING_MEDIUM:
case gfx::FontRenderParams::HINTING_FULL:
return SkPaint::kNormal_Hinting;
default:
NOTREACHED();
return SkPaint::kNormal_Hinting;
}
}
switch (prefs.hinting) {
case gfx::FontRenderParams::HINTING_NONE: return SkPaint::kNo_Hinting;
case gfx::FontRenderParams::HINTING_SLIGHT: return SkPaint::kSlight_Hinting;
case gfx::FontRenderParams::HINTING_MEDIUM: return SkPaint::kNormal_Hinting;
case gfx::FontRenderParams::HINTING_FULL: return SkPaint::kFull_Hinting;
default:
NOTREACHED();
return SkPaint::kNormal_Hinting;
}
}
SkFontHost::LCDOrder RendererPreferencesToSkiaLCDOrder(
const RendererPreferences& prefs) {
switch (prefs.subpixel_rendering) {
case gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE:
case gfx::FontRenderParams::SUBPIXEL_RENDERING_RGB:
case gfx::FontRenderParams::SUBPIXEL_RENDERING_VRGB:
return SkFontHost::kRGB_LCDOrder;
case gfx::FontRenderParams::SUBPIXEL_RENDERING_BGR:
case gfx::FontRenderParams::SUBPIXEL_RENDERING_VBGR:
return SkFontHost::kBGR_LCDOrder;
default:
NOTREACHED();
return SkFontHost::kRGB_LCDOrder;
}
}
SkFontHost::LCDOrientation RendererPreferencesToSkiaLCDOrientation(
const RendererPreferences& prefs) {
switch (prefs.subpixel_rendering) {
case gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE:
case gfx::FontRenderParams::SUBPIXEL_RENDERING_RGB:
case gfx::FontRenderParams::SUBPIXEL_RENDERING_BGR:
return SkFontHost::kHorizontal_LCDOrientation;
case gfx::FontRenderParams::SUBPIXEL_RENDERING_VRGB:
case gfx::FontRenderParams::SUBPIXEL_RENDERING_VBGR:
return SkFontHost::kVertical_LCDOrientation;
default:
NOTREACHED();
return SkFontHost::kHorizontal_LCDOrientation;
}
}
} // namespace
void RenderViewImpl::UpdateFontRenderingFromRendererPrefs() {
const RendererPreferences& prefs = renderer_preferences_;
WebFontRendering::setHinting(RendererPreferencesToSkiaHinting(prefs));
WebFontRendering::setAutoHint(prefs.use_autohinter);
WebFontRendering::setUseBitmaps(prefs.use_bitmaps);
WebFontRendering::setLCDOrder(RendererPreferencesToSkiaLCDOrder(prefs));
WebFontRendering::setLCDOrientation(
RendererPreferencesToSkiaLCDOrientation(prefs));
WebFontRendering::setAntiAlias(prefs.should_antialias_text);
WebFontRendering::setSubpixelRendering(
prefs.subpixel_rendering !=
gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE);
WebFontRendering::setSubpixelPositioning(prefs.use_subpixel_positioning);
}
} // namespace content
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