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 const int kMaxDefaultFontSize = 999;
  18
  19 SkPaint::Hinting RendererPreferencesToSkiaHinting(
  20     const RendererPreferences& prefs) {
  21   if (!prefs.should_antialias_text) {
  22     // When anti-aliasing is off, GTK maps all non-zero hinting settings to
  23     // 'Normal' hinting so we do the same. Otherwise, folks who have 'Slight'
  24     // hinting selected will see readable text in everything expect Chromium.
  25     switch (prefs.hinting) {
  26       case gfx::FontRenderParams::HINTING_NONE:
  27         return SkPaint::kNo_Hinting;
  28       case gfx::FontRenderParams::HINTING_SLIGHT:
  29       case gfx::FontRenderParams::HINTING_MEDIUM:
  30       case gfx::FontRenderParams::HINTING_FULL:
  31         return SkPaint::kNormal_Hinting;
  32       default:
  33         NOTREACHED();
  34         return SkPaint::kNormal_Hinting;
  35     }
  36   }
  37
  38   switch (prefs.hinting) {
  39     case gfx::FontRenderParams::HINTING_NONE:   return SkPaint::kNo_Hinting;
  40     case gfx::FontRenderParams::HINTING_SLIGHT: return SkPaint::kSlight_Hinting;
  41     case gfx::FontRenderParams::HINTING_MEDIUM: return SkPaint::kNormal_Hinting;
  42     case gfx::FontRenderParams::HINTING_FULL:   return SkPaint::kFull_Hinting;
  43     default:
  44       NOTREACHED();
  45       return SkPaint::kNormal_Hinting;
  46     }
  47 }
  48
  49 }  // namespace
  50
  51 void RenderViewImpl::UpdateFontRenderingFromRendererPrefs() {
  52   const RendererPreferences& prefs = renderer_preferences_;
  53   WebFontRendering::setHinting(RendererPreferencesToSkiaHinting(prefs));
  54   WebFontRendering::setAutoHint(prefs.use_autohinter);
  55   WebFontRendering::setUseBitmaps(prefs.use_bitmaps);
  56   WebFontRendering::setLCDOrder(
  57       gfx::FontRenderParams::SubpixelRenderingToSkiaLCDOrder(
  58           prefs.subpixel_rendering));
  59   WebFontRendering::setLCDOrientation(
  60       gfx::FontRenderParams::SubpixelRenderingToSkiaLCDOrientation(
  61           prefs.subpixel_rendering));
  62   WebFontRendering::setAntiAlias(prefs.should_antialias_text);
  63   WebFontRendering::setSubpixelRendering(
  64       prefs.subpixel_rendering !=
  65       gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE);
  66   WebFontRendering::setSubpixelPositioning(prefs.use_subpixel_positioning);
  67   if (prefs.default_font_size > 0 &&
  68       prefs.default_font_size <= kMaxDefaultFontSize) {
  69     WebFontRendering::setDefaultFontSize(prefs.default_font_size);
  70   }
  71 }
  72
  73 }  // namespace content