ui/gfx: Allow for font-specific rendering settings.

ui/gfx/platform_font_pango.h

 // 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.
 
 #ifndef UI_GFX_PLATFORM_FONT_PANGO_H_
 #define UI_GFX_PLATFORM_FONT_PANGO_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
+#include "ui/gfx/font_render_params.h"
 #include "ui/gfx/platform_font.h"
 
 class SkTypeface;
 class SkPaint;
 
 namespace gfx {
 
 class GFX_EXPORT PlatformFontPango : public PlatformFont {
  public:
   PlatformFontPango();
   explicit PlatformFontPango(NativeFont native_font);
-  PlatformFontPango(const std::string& font_name, int font_size);
+  PlatformFontPango(const std::string& font_name, int font_size_pixels);
 
   // Converts |gfx_font| to a new pango font. Free the returned font with
   // pango_font_description_free().
   static PangoFontDescription* PangoFontFromGfxFont(const gfx::Font& gfx_font);
 
   // Resets and reloads the cached system font used by the default constructor.
   // This function is useful when the system font has changed, for example, when
   // the locale has changed.
   static void ReloadDefaultFont();
 
@@ skipping 12 matching lines @@
   // Overridden from PlatformFont:
   virtual Font DeriveFont(int size_delta, int style) const OVERRIDE;
   virtual int GetHeight() const OVERRIDE;
   virtual int GetBaseline() const OVERRIDE;
   virtual int GetCapHeight() const OVERRIDE;
   virtual int GetExpectedTextWidth(int length) const OVERRIDE;
   virtual int GetStyle() const OVERRIDE;
   virtual std::string GetFontName() const OVERRIDE;
   virtual std::string GetActualFontNameForTesting() const OVERRIDE;
   virtual int GetFontSize() const OVERRIDE;
+  virtual const FontRenderParams& GetFontRenderParams() const OVERRIDE;
   virtual NativeFont GetNativeFont() const OVERRIDE;
 
  private:
   // Create a new instance of this object with the specified properties. Called
   // from DeriveFont.
   PlatformFontPango(const skia::RefPtr<SkTypeface>& typeface,
                     const std::string& name,
-                    int size,
-                    int style);
+                    int size_pixels,
+                    int style,
+                    const FontRenderParams& params);
   virtual ~PlatformFontPango();
 
   // Initializes this object based on the passed-in details. If |typeface| is
   // empty, a new typeface will be loaded.
   void InitFromDetails(
       const skia::RefPtr<SkTypeface>& typeface,
       const std::string& font_family,
-      int font_size,
-      int style);
+      int font_size_pixels,
+      int style,
+      const FontRenderParams& params);
 
   // Initializes this object as a copy of another PlatformFontPango.
   void InitFromPlatformFont(const PlatformFontPango* other);
 
   // Potentially slow call to get pango metrics (average width, underline info).
   void InitPangoMetrics();
 
   // Setup a Skia context to use the current typeface.
   void PaintSetup(SkPaint* paint) const;
 
   // Make |this| a copy of |other|.
   void CopyFont(const Font& other);
 
   // The average width of a character, initialized and cached if needed.
   double GetAverageWidth() const;
 
   skia::RefPtr<SkTypeface> typeface_;
 
-  // Additional information about the face
+  // Additional information about the face.
   // Skia actually expects a family name and not a font name.
   std::string font_family_;
   int font_size_pixels_;
   int style_;
 
+  // Information describing how the font should be rendered.
+  FontRenderParams font_render_params_;
+
   // Cached metrics, generated at construction.
   int ascent_pixels_;
   int height_pixels_;
   int cap_height_pixels_;
 
   // The pango metrics are much more expensive so we wait until we need them
   // to compute them.
   bool pango_metrics_inited_;
   double average_width_pixels_;
   double underline_position_pixels_;
   double underline_thickness_pixels_;
 
   // The default font, used for the default constructor.
   static Font* default_font_;
 
 #if defined(OS_CHROMEOS)
   static std::string* default_font_description_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(PlatformFontPango);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_PLATFORM_FONT_PANGO_H_