gfxPlatformMac.h - mozsearch

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef GFX_PLATFORM_MAC_H

#define GFX_PLATFORM_MAC_H

#include "nsTArrayForwardDeclare.h"

#include "gfxPlatform.h"

#include "mozilla/LookAndFeel.h"

namespace mozilla {

namespace gfx {

class DrawTarget;

class VsyncSource;

}  // namespace gfx

}  // namespace mozilla

class gfxPlatformMac : public gfxPlatform {

 public:

  gfxPlatformMac();

  virtual ~gfxPlatformMac();

  // Call early in startup to register the macOS supplemental language fonts

  // so that they're usable by the browser. This is intended to be called as

  // early as possible, before most services etc are initialized; it starts

  // a separate thread to register the fonts, because this is quite slow.

  static void RegisterSupplementalFonts();

  // Call from the main thread at the point where we need to start using the

  // font list; this will wait (if necessary) for the registration thread to

  // finish.

  static void WaitForFontRegistration();

  static gfxPlatformMac* GetPlatform() {

    return (gfxPlatformMac*)gfxPlatform::GetPlatform();

  already_AddRefed<gfxASurface> CreateOffscreenSurface(

      const IntSize& aSize, gfxImageFormat aFormat) override;

  bool CreatePlatformFontList() override;

  void ReadSystemFontList(mozilla::dom::SystemFontList* aFontList) override;

  void GetCommonFallbackFonts(uint32_t aCh, Script aRunScript,

                              eFontPresentation aPresentation,

                              nsTArray<const char*>& aFontList) override;

  // lookup the system font for a particular system font type and set

  // the name and style characteristics

  static void LookupSystemFont(mozilla::LookAndFeel::FontID aSystemFontID,

                               nsACString& aSystemFontName,

                               gfxFontStyle& aFontStyle);

  bool SupportsApzWheelInput() const override { return true; }

  bool RespectsFontStyleSmoothing() const override {

    // gfxMacFont respects the font smoothing hint.

    return true;

  bool RequiresAcceleratedGLContextForCompositorOGL() const override {

    // On OS X in a VM, unaccelerated CompositorOGL shows black flashes, so we

    // require accelerated GL for CompositorOGL but allow unaccelerated GL for

    // BasicCompositor.

    return true;

  already_AddRefed<mozilla::gfx::VsyncSource> CreateGlobalHardwareVsyncSource()

      override;

  // lower threshold on font anti-aliasing

  uint32_t GetAntiAliasingThreshold() { return mFontAntiAliasingThreshold; }

  static bool CheckVariationFontSupport();

 protected:

  bool AccelerateLayersByDefault() override;

  BackendPrefsData GetBackendPrefs() const override;

  void InitPlatformGPUProcessPrefs() override;

 private:

  nsTArray<uint8_t> GetPlatformCMSOutputProfileData() override;

  // read in the pref value for the lower threshold on font anti-aliasing

  static uint32_t ReadAntiAliasingThreshold();

  static void FontRegistrationCallback(void* aUnused);

  uint32_t mFontAntiAliasingThreshold;

  static PRThread* sFontRegistrationThread;

};

#endif /* GFX_PLATFORM_MAC_H */