content/renderer/render_view_linux.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/render_view_impl.h"
   6
   7 #include "content/public/common/renderer_preferences.h"
   8 #include "third_party/WebKit/public/web/linux/WebFontRendering.h"
   9 #include "ui/gfx/font_render_params.h"
  10
  11 using blink::WebFontRendering;
  12
  13 namespace content {
  14
  15 namespace {
  16
  17 SkPaint::Hinting RendererPreferencesToSkiaHinting(
  18     const RendererPreferences& prefs) {
  19   if (!prefs.should_antialias_text) {
  20     // When anti-aliasing is off, GTK maps all non-zero hinting settings to
  21     // 'Normal' hinting so we do the same. Otherwise, folks who have 'Slight'
  22     // hinting selected will see readable text in everything expect Chromium.
  23     switch (prefs.hinting) {
  24       case gfx::FontRenderParams::HINTING_NONE:
  25         return SkPaint::kNo_Hinting;
  26       case gfx::FontRenderParams::HINTING_SLIGHT:
  27       case gfx::FontRenderParams::HINTING_MEDIUM:
  28       case gfx::FontRenderParams::HINTING_FULL:
  29         return SkPaint::kNormal_Hinting;
  30       default:
  31         NOTREACHED();
  32         return SkPaint::kNormal_Hinting;
  33     }
  34   }
  35
  36   switch (prefs.hinting) {
  37     case gfx::FontRenderParams::HINTING_NONE:   return SkPaint::kNo_Hinting;
  38     case gfx::FontRenderParams::HINTING_SLIGHT: return SkPaint::kSlight_Hinting;
  39     case gfx::FontRenderParams::HINTING_MEDIUM: return SkPaint::kNormal_Hinting;
  40     case gfx::FontRenderParams::HINTING_FULL:   return SkPaint::kFull_Hinting;
  41     default:
  42       NOTREACHED();
  43       return SkPaint::kNormal_Hinting;
  44     }
  45 }
  46
  47 }  // namespace
  48
  49 void RenderViewImpl::UpdateFontRenderingFromRendererPrefs() {
  50   const RendererPreferences& prefs = renderer_preferences_;
  51   WebFontRendering::setHinting(RendererPreferencesToSkiaHinting(prefs));
  52   WebFontRendering::setAutoHint(prefs.use_autohinter);
  53   WebFontRendering::setUseBitmaps(prefs.use_bitmaps);
  54   WebFontRendering::setLCDOrder(
  55       gfx::FontRenderParams::SubpixelRenderingToSkiaLCDOrder(
  56           prefs.subpixel_rendering));
  57   WebFontRendering::setLCDOrientation(
  58       gfx::FontRenderParams::SubpixelRenderingToSkiaLCDOrientation(
  59           prefs.subpixel_rendering));
  60   WebFontRendering::setAntiAlias(prefs.should_antialias_text);
  61   WebFontRendering::setSubpixelRendering(
  62       prefs.subpixel_rendering !=
  63       gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE);
  64   WebFontRendering::setSubpixelPositioning(prefs.use_subpixel_positioning);
  65 }
  66
  67 }  // namespace content