1 // Copyright 2013 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 #ifndef UI_GFX_LINUX_FONT_DELEGATE_H_ 6 #define UI_GFX_LINUX_FONT_DELEGATE_H_ 7 8 #include <string> 9 10 #include "ui/gfx/font_render_params_linux.h" 11 #include "ui/gfx/gfx_export.h" 12 13 namespace gfx { 14 15 // Allows a Linux platform specific overriding of font preferences. 16 class GFX_EXPORT LinuxFontDelegate { 17 public: ~LinuxFontDelegate()18 virtual ~LinuxFontDelegate() {} 19 20 // Sets the dynamically loaded singleton that provides font preferences. 21 // This pointer is not owned, and if this method is called a second time, 22 // the first instance is not deleted. 23 static void SetInstance(LinuxFontDelegate* instance); 24 25 // Returns a LinuxFontDelegate instance for the toolkit used in 26 // the user's desktop environment. 27 // 28 // Can return NULL, in case no toolkit has been set. (For example, if we're 29 // running with the "--ash" flag.) 30 static const LinuxFontDelegate* instance(); 31 32 // Whether we should antialias our text. 33 virtual bool UseAntialiasing() const = 0; 34 35 // What sort of text hinting should we apply? 36 virtual FontRenderParams::Hinting GetHintingStyle() const = 0; 37 38 // What sort of subpixel rendering should we perform. 39 virtual FontRenderParams::SubpixelRendering 40 GetSubpixelRenderingStyle() const = 0; 41 42 // Returns the default font name for pango style rendering. The format is a 43 // string of the form "[font name] [font size]". 44 virtual std::string GetDefaultFontName() const = 0; 45 }; 46 47 } // namespace gfx 48 49 #endif // UI_GFX_LINUX_FONT_DELEGATE_H_ 50