gfx/thebes/gfxPlatformGtk.h

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef GFX_PLATFORM_GTK_H
   7 #define GFX_PLATFORM_GTK_H
   8
   9 #include "gfxPlatform.h"
  10 #include "gfxPrefs.h"
  11 #include "nsAutoRef.h"
  12 #include "nsTArray.h"
  13
  14 #if (MOZ_WIDGET_GTK == 2)
  15 extern "C" {
  16     typedef struct _GdkDrawable GdkDrawable;
  17 }
  18 #endif
  19
  20 class gfxFontconfigUtils;
  21
  22 class gfxPlatformGtk : public gfxPlatform {
  23 public:
  24     gfxPlatformGtk();
  25     virtual ~gfxPlatformGtk();
  26
  27     static gfxPlatformGtk *GetPlatform() {
  28         return (gfxPlatformGtk*) gfxPlatform::GetPlatform();
  29     }
  30
  31     virtual already_AddRefed<gfxASurface>
  32       CreateOffscreenSurface(const IntSize& size,
  33                              gfxContentType contentType) MOZ_OVERRIDE;
  34
  35     mozilla::TemporaryRef<mozilla::gfx::ScaledFont>
  36       GetScaledFontForFont(mozilla::gfx::DrawTarget* aTarget, gfxFont *aFont);
  37
  38     nsresult GetFontList(nsIAtom *aLangGroup,
  39                          const nsACString& aGenericFamily,
  40                          nsTArray<nsString>& aListOfFonts);
  41
  42     nsresult UpdateFontList();
  43
  44     nsresult GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName);
  45
  46     gfxFontGroup *CreateFontGroup(const mozilla::FontFamilyList& aFontFamilyList,
  47                                   const gfxFontStyle *aStyle,
  48                                   gfxUserFontSet *aUserFontSet);
  49
  50     /**
  51      * Look up a local platform font using the full font face name (needed to
  52      * support @font-face src local() )
  53      */
  54     virtual gfxFontEntry* LookupLocalFont(const gfxProxyFontEntry *aProxyEntry,
  55                                           const nsAString& aFontName);
  56
  57     /**
  58      * Activate a platform font (needed to support @font-face src url() )
  59      *
  60      */
  61     virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry,
  62                                            const uint8_t *aFontData,
  63                                            uint32_t aLength);
  64
  65     /**
  66      * Check whether format is supported on a platform or not (if unclear,
  67      * returns true).
  68      */
  69     virtual bool IsFontFormatSupported(nsIURI *aFontURI,
  70                                          uint32_t aFormatFlags);
  71
  72 #if (MOZ_WIDGET_GTK == 2)
  73     static void SetGdkDrawable(cairo_surface_t *target,
  74                                GdkDrawable *drawable);
  75     static GdkDrawable *GetGdkDrawable(cairo_surface_t *target);
  76 #endif
  77
  78     static int32_t GetDPI();
  79
  80     bool UseXRender() {
  81 #if defined(MOZ_X11)
  82         if (GetContentBackend() != mozilla::gfx::BackendType::NONE &&
  83             GetContentBackend() != mozilla::gfx::BackendType::CAIRO)
  84             return false;
  85
  86         return sUseXRender;
  87 #else
  88         return false;
  89 #endif
  90     }
  91
  92     bool UseImageOffscreenSurfaces() {
  93         // We want to turn on image offscreen surfaces ONLY for GTK3 builds
  94         // since GTK2 theme rendering still requires xlib surfaces per se.
  95 #if (MOZ_WIDGET_GTK == 3)
  96         return gfxPrefs::UseImageOffscreenSurfaces();
  97 #else
  98         return false;
  99 #endif
 100     }
 101
 102     virtual gfxImageFormat GetOffscreenFormat();
 103
 104     virtual int GetScreenDepth() const;
 105
 106 protected:
 107     static gfxFontconfigUtils *sFontconfigUtils;
 108
 109 private:
 110     virtual void GetPlatformCMSOutputProfile(void *&mem, size_t &size);
 111
 112 #ifdef MOZ_X11
 113     static bool sUseXRender;
 114 #endif
 115 };
 116
 117 #endif /* GFX_PLATFORM_GTK_H */