Linux: splice together RendererPreferences and SkFontHost

chrome/renderer/render_view_linux.cc

+// 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 "webkit/api/public/linux/WebFontRendering.h"
+
+using WebKit::WebFontRendering;
+
+static SkPaint::Hinting RendererPreferencesToSkiaHinting(
+    RendererPreferencesHintingEnum hinting) {
+  switch (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.hinting));
+  WebFontRendering::setLCDOrder(
+      RendererPreferencesToSkiaLCDOrder(prefs.subpixel_rendering));
+  WebFontRendering::setLCDOrientation(
+      RendererPreferencesToSkiaLCDOrientation(prefs.subpixel_rendering));
+  WebFontRendering::setAntiAlias(RendererPreferencesToAntiAliasFlag(prefs));
+  WebFontRendering::setSubpixelGlyphs(
+      RendererPreferencesToSubpixelGlyphsFlag(prefs));
+}