The Tor Browser: gfx/thebes/gfxWindowsPlatform.h@97036ab72558 (annotated)

gfx/thebes/gfxWindowsPlatform.h@97036ab72558 (annotated)

gfx/thebes/gfxWindowsPlatform.h

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
  * 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_WINDOWS_PLATFORM_H
 #define GFX_WINDOWS_PLATFORM_H
 /**
  * XXX to get CAIRO_HAS_D2D_SURFACE, CAIRO_HAS_DWRITE_FONT
  * and cairo_win32_scaled_font_select_font
  */
 #include "cairo-win32.h"
 #include "gfxFontUtils.h"
 #include "gfxWindowsSurface.h"
 #include "gfxFont.h"
 #ifdef CAIRO_HAS_DWRITE_FONT
 #include "gfxDWriteFonts.h"
 #endif
 #include "gfxPlatform.h"
 #include "gfxContext.h"
 #include "nsTArray.h"
 #include "nsDataHashtable.h"
 #include "mozilla/RefPtr.h"
 #include <windows.h>
 #include <objbase.h>
 #ifdef CAIRO_HAS_D2D_SURFACE
 #include <dxgi.h>
 #endif
 // This header is available in the June 2010 SDK and in the Win8 SDK
 #include <d3dcommon.h>
 // Win 8.0 SDK types we'll need when building using older sdks.
 #if !defined(D3D_FEATURE_LEVEL_11_1) // defined in the 8.0 SDK only
 #define D3D_FEATURE_LEVEL_11_1 static_cast<D3D_FEATURE_LEVEL>(0xb100)
 #define D3D_FL9_1_REQ_TEXTURE2D_U_OR_V_DIMENSION 2048
 #define D3D_FL9_3_REQ_TEXTURE2D_U_OR_V_DIMENSION 4096
 #endif
 namespace mozilla {
 namespace layers {
 class DeviceManagerD3D9;
 }
 }
 class IDirect3DDevice9;
 class ID3D11Device;
 class IDXGIAdapter1;
 class nsIMemoryReporter;
 // Utility to get a Windows HDC from a thebes context,
 // used by both GDI and Uniscribe font shapers
 struct DCFromContext {
     DCFromContext(gfxContext *aContext) {
         dc = nullptr;
         nsRefPtr<gfxASurface> aSurface = aContext->CurrentSurface();
         NS_ASSERTION(aSurface || !aContext->IsCairo(), "DCFromContext: null surface");
         if (aSurface &&
             (aSurface->GetType() == gfxSurfaceType::Win32 ||
              aSurface->GetType() == gfxSurfaceType::Win32Printing))
         {
             dc = static_cast<gfxWindowsSurface*>(aSurface.get())->GetDC();
             needsRelease = false;
             SaveDC(dc);
             cairo_scaled_font_t* scaled =
                 cairo_get_scaled_font(aContext->GetCairo());
             cairo_win32_scaled_font_select_font(scaled, dc);
         }
         if (!dc) {
             dc = GetDC(nullptr);
             SetGraphicsMode(dc, GM_ADVANCED);
             needsRelease = true;
         }
     }
     ~DCFromContext() {
         if (needsRelease) {
             ReleaseDC(nullptr, dc);
         } else {
             RestoreDC(dc, -1);
         }
     }
     operator HDC () {
         return dc;
     }
     HDC dc;
     bool needsRelease;
 };
 // ClearType parameters set by running ClearType tuner
 struct ClearTypeParameterInfo {
     ClearTypeParameterInfo() :
         gamma(-1), pixelStructure(-1), clearTypeLevel(-1), enhancedContrast(-1)
     { }
     nsString    displayName;  // typically just 'DISPLAY1'
     int32_t     gamma;
     int32_t     pixelStructure;
     int32_t     clearTypeLevel;
     int32_t     enhancedContrast;
 };
 class gfxWindowsPlatform : public gfxPlatform {
 public:
     enum TextRenderingMode {
         TEXT_RENDERING_NO_CLEARTYPE,
         TEXT_RENDERING_NORMAL,
         TEXT_RENDERING_GDI_CLASSIC,
         TEXT_RENDERING_COUNT
     };
     gfxWindowsPlatform();
     virtual ~gfxWindowsPlatform();
     static gfxWindowsPlatform *GetPlatform() {
         return (gfxWindowsPlatform*) gfxPlatform::GetPlatform();
     }
     virtual gfxPlatformFontList* CreatePlatformFontList();
     virtual already_AddRefed<gfxASurface>
       CreateOffscreenSurface(const IntSize& size,
                              gfxContentType contentType) MOZ_OVERRIDE;
     virtual already_AddRefed<gfxASurface>
       CreateOffscreenImageSurface(const gfxIntSize& aSize,
                                   gfxContentType aContentType);
     virtual mozilla::TemporaryRef<mozilla::gfx::ScaledFont>
       GetScaledFontForFont(mozilla::gfx::DrawTarget* aTarget, gfxFont *aFont);
     virtual already_AddRefed<gfxASurface>
       GetThebesSurfaceForDrawTarget(mozilla::gfx::DrawTarget *aTarget);
     enum RenderMode {
         /* Use GDI and windows surfaces */
         RENDER_GDI = 0,
         /* Use 32bpp image surfaces and call StretchDIBits */
         RENDER_IMAGE_STRETCH32,
         /* Use 32bpp image surfaces, and do 32->24 conversion before calling StretchDIBits */
         RENDER_IMAGE_STRETCH24,
         /* Use Direct2D rendering */
         RENDER_DIRECT2D,
         /* max */
         RENDER_MODE_MAX
     };
     int GetScreenDepth() const;
     RenderMode GetRenderMode() { return mRenderMode; }
     void SetRenderMode(RenderMode rmode) { mRenderMode = rmode; }
     /**
      * Updates render mode with relation to the current preferences and
      * available devices.
      */
     void UpdateRenderMode();
     /**
      * Verifies a D2D device is present and working, will attempt to create one
      * it is non-functional or non-existant.
      *
      * \param aAttemptForce Attempt to force D2D cairo device creation by using
      * cairo device creation routines.
      */
     void VerifyD2DDevice(bool aAttemptForce);
 #ifdef CAIRO_HAS_D2D_SURFACE
     HRESULT CreateDevice(nsRefPtr<IDXGIAdapter1> &adapter1, int featureLevelIndex);
 #endif
     /**
      * Return the resolution scaling factor to convert between "logical" or
      * "screen" pixels as used by Windows (dependent on the DPI scaling option
      * in the Display control panel) and actual device pixels.
      */
     double GetDPIScale();
     nsresult GetFontList(nsIAtom *aLangGroup,
                          const nsACString& aGenericFamily,
                          nsTArray<nsString>& aListOfFonts);
     nsresult UpdateFontList();
     virtual void GetCommonFallbackFonts(const uint32_t aCh,
                                         int32_t aRunScript,
                                         nsTArray<const char*>& aFontList);
     nsresult ResolveFontName(const nsAString& aFontName,
                              FontResolverCallback aCallback,
                              void *aClosure, bool& aAborted);
     nsresult GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName);
     gfxFontGroup *CreateFontGroup(const nsAString &aFamilies,
                                   const gfxFontStyle *aStyle,
                                   gfxUserFontSet *aUserFontSet);
     /**
      * Look up a local platform font using the full font face name (needed to support @font-face src local() )
      */
     virtual gfxFontEntry* LookupLocalFont(const gfxProxyFontEntry *aProxyEntry,
                                           const nsAString& aFontName);
     /**
      * Activate a platform font (needed to support @font-face src url() )
      */
     virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry,
                                            const uint8_t *aFontData,
                                            uint32_t aLength);
     /**
      * Check whether format is supported on a platform or not (if unclear, returns true)
      */
     virtual bool IsFontFormatSupported(nsIURI *aFontURI, uint32_t aFormatFlags);
     /* Find a FontFamily/FontEntry object that represents a font on your system given a name */
     gfxFontFamily *FindFontFamily(const nsAString& aName);
     gfxFontEntry *FindFontEntry(const nsAString& aName, const gfxFontStyle& aFontStyle);
     bool GetPrefFontEntries(const nsCString& aLangGroup, nsTArray<nsRefPtr<gfxFontEntry> > *array);
     void SetPrefFontEntries(const nsCString& aLangGroup, nsTArray<nsRefPtr<gfxFontEntry> >& array);
     void ClearPrefFonts() { mPrefFonts.Clear(); }
     // ClearType is not always enabled even when available (e.g. Windows XP)
     // if either of these prefs are enabled and apply, use ClearType rendering
     bool UseClearTypeForDownloadableFonts();
     bool UseClearTypeAlways();
     static void GetDLLVersion(char16ptr_t aDLLPath, nsAString& aVersion);
     // returns ClearType tuning information for each display
     static void GetCleartypeParams(nsTArray<ClearTypeParameterInfo>& aParams);
     virtual void FontsPrefsChanged(const char *aPref);
     void SetupClearTypeParams();
 #ifdef CAIRO_HAS_DWRITE_FONT
     IDWriteFactory *GetDWriteFactory() { return mDWriteFactory; }
     inline bool DWriteEnabled() { return mUseDirectWrite; }
     inline DWRITE_MEASURING_MODE DWriteMeasuringMode() { return mMeasuringMode; }
     IDWriteTextAnalyzer *GetDWriteAnalyzer() { return mDWriteAnalyzer; }
     IDWriteRenderingParams *GetRenderingParams(TextRenderingMode aRenderMode)
     { return mRenderingParams[aRenderMode]; }
 #else
     inline bool DWriteEnabled() { return false; }
 #endif
     void OnDeviceManagerDestroy(mozilla::layers::DeviceManagerD3D9* aDeviceManager);
     mozilla::layers::DeviceManagerD3D9* GetD3D9DeviceManager();
     IDirect3DDevice9* GetD3D9Device();
 #ifdef CAIRO_HAS_D2D_SURFACE
     cairo_device_t *GetD2DDevice() { return mD2DDevice; }
     ID3D10Device1 *GetD3D10Device() { return mD2DDevice ? cairo_d2d_device_get_device(mD2DDevice) : nullptr; }
 #endif
     ID3D11Device *GetD3D11Device();
     static bool IsOptimus();
 protected:
     RenderMode mRenderMode;
     int8_t mUseClearTypeForDownloadableFonts;
     int8_t mUseClearTypeAlways;
 private:
     void Init();
     IDXGIAdapter1 *GetDXGIAdapter();
     bool mUseDirectWrite;
     bool mUsingGDIFonts;
 #ifdef CAIRO_HAS_DWRITE_FONT
     nsRefPtr<IDWriteFactory> mDWriteFactory;
     nsRefPtr<IDWriteTextAnalyzer> mDWriteAnalyzer;
     nsRefPtr<IDWriteRenderingParams> mRenderingParams[TEXT_RENDERING_COUNT];
     DWRITE_MEASURING_MODE mMeasuringMode;
 #endif
 #ifdef CAIRO_HAS_D2D_SURFACE
     cairo_device_t *mD2DDevice;
 #endif
     mozilla::RefPtr<IDXGIAdapter1> mAdapter;
     nsRefPtr<mozilla::layers::DeviceManagerD3D9> mDeviceManager;
     mozilla::RefPtr<ID3D11Device> mD3D11Device;
     bool mD3D11DeviceInitialized;
     virtual void GetPlatformCMSOutputProfile(void* &mem, size_t &size);
     // TODO: unify this with mPrefFonts (NB: holds families, not fonts) in gfxPlatformFontList
     nsDataHashtable<nsCStringHashKey, nsTArray<nsRefPtr<gfxFontEntry> > > mPrefFonts;
 };
 #endif /* GFX_WINDOWS_PLATFORM_H */

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gfx/thebes/gfxWindowsPlatform.h@97036ab72558 (annotated)

gfx/thebes/gfxWindowsPlatform.h