/* -*- 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_PLATFORM_H #define GFX_PLATFORM_H #include "prlog.h" #include "nsTArray.h" #include "nsStringGlue.h" #include "nsIObserver.h" #include "gfxTypes.h" #include "gfxASurface.h" #include "gfxColor.h" #include "qcms.h" #include "gfx2DGlue.h" #include "mozilla/RefPtr.h" #include "GfxInfoCollector.h" #ifdef XP_OS2 #undef OS2EMX_PLAIN_CHAR #endif class gfxImageSurface; class gfxFont; class gfxFontGroup; struct gfxFontStyle; class gfxUserFontSet; class gfxFontEntry; class gfxProxyFontEntry; class gfxPlatformFontList; class gfxTextRun; class nsIURI; class nsIAtom; extern cairo_user_data_key_t kDrawTarget; // pref lang id's for font prefs // !!! needs to match the list of pref font.default.xx entries listed in all.js !!! // !!! don't use as bit mask, this may grow larger !!! enum eFontPrefLang { eFontPrefLang_Western = 0, eFontPrefLang_CentEuro = 1, eFontPrefLang_Japanese = 2, eFontPrefLang_ChineseTW = 3, eFontPrefLang_ChineseCN = 4, eFontPrefLang_ChineseHK = 5, eFontPrefLang_Korean = 6, eFontPrefLang_Cyrillic = 7, eFontPrefLang_Baltic = 8, eFontPrefLang_Greek = 9, eFontPrefLang_Turkish = 10, eFontPrefLang_Thai = 11, eFontPrefLang_Hebrew = 12, eFontPrefLang_Arabic = 13, eFontPrefLang_Devanagari = 14, eFontPrefLang_Tamil = 15, eFontPrefLang_Armenian = 16, eFontPrefLang_Bengali = 17, eFontPrefLang_Canadian = 18, eFontPrefLang_Ethiopic = 19, eFontPrefLang_Georgian = 20, eFontPrefLang_Gujarati = 21, eFontPrefLang_Gurmukhi = 22, eFontPrefLang_Khmer = 23, eFontPrefLang_Malayalam = 24, eFontPrefLang_Oriya = 25, eFontPrefLang_Telugu = 26, eFontPrefLang_Kannada = 27, eFontPrefLang_Sinhala = 28, eFontPrefLang_Tibetan = 29, eFontPrefLang_LangCount = 30, // except Others and UserDefined. eFontPrefLang_Others = 30, // x-unicode eFontPrefLang_UserDefined = 31, eFontPrefLang_CJKSet = 32, // special code for CJK set eFontPrefLang_AllCount = 33 }; enum eCMSMode { eCMSMode_Off = 0, // No color management eCMSMode_All = 1, // Color manage everything eCMSMode_TaggedOnly = 2, // Color manage tagged Images Only eCMSMode_AllCount = 3 }; enum eGfxLog { // all font enumerations, localized names, fullname/psnames, cmap loads eGfxLog_fontlist = 0, // timing info on font initialization eGfxLog_fontinit = 1, // dump text runs, font matching, system fallback for content eGfxLog_textrun = 2, // dump text runs, font matching, system fallback for chrome eGfxLog_textrunui = 3, // dump cmap coverage data as they are loaded eGfxLog_cmapdata = 4 }; // when searching through pref langs, max number of pref langs const uint32_t kMaxLenPrefLangList = 32; #define UNINITIALIZED_VALUE (-1) typedef gfxASurface::gfxImageFormat gfxImageFormat; inline const char* GetBackendName(mozilla::gfx::BackendType aBackend) { switch (aBackend) { case mozilla::gfx::BACKEND_DIRECT2D: return "direct2d"; case mozilla::gfx::BACKEND_COREGRAPHICS_ACCELERATED: return "quartz accelerated"; case mozilla::gfx::BACKEND_COREGRAPHICS: return "quartz"; case mozilla::gfx::BACKEND_CAIRO: return "cairo"; case mozilla::gfx::BACKEND_SKIA: return "skia"; case mozilla::gfx::BACKEND_RECORDING: return "recording"; case mozilla::gfx::BACKEND_NONE: return "none"; } MOZ_NOT_REACHED("Incomplete switch"); } class THEBES_API gfxPlatform { public: /** * Return a pointer to the current active platform. * This is a singleton; it contains mostly convenience * functions to obtain platform-specific objects. */ static gfxPlatform *GetPlatform(); /** * Shut down Thebes. * Init() arranges for this to be called at an appropriate time. */ static void Shutdown(); /** * Create an offscreen surface of the given dimensions * and image format. */ virtual already_AddRefed CreateOffscreenSurface(const gfxIntSize& size, gfxASurface::gfxContentType contentType) = 0; /** * Create an offscreen surface of the given dimensions and image format which * can be converted to a gfxImageSurface without copying. If we can provide * a platform-hosted surface, then we will return that instead of an actual * gfxImageSurface. * Sub-classes should override this method if CreateOffscreenSurface returns a * surface which implements GetAsImageSurface */ virtual already_AddRefed CreateOffscreenImageSurface(const gfxIntSize& aSize, gfxASurface::gfxContentType aContentType); virtual already_AddRefed OptimizeImage(gfxImageSurface *aSurface, gfxASurface::gfxImageFormat format); virtual mozilla::RefPtr CreateDrawTargetForSurface(gfxASurface *aSurface, const mozilla::gfx::IntSize& aSize); /* * Creates a SourceSurface for a gfxASurface. This function does no caching, * so the caller should cache the gfxASurface if it will be used frequently. * The returned surface keeps a reference to aTarget, so it is OK to keep the * surface, even if aTarget changes. * aTarget should not keep a reference to the returned surface because that * will cause a cycle. */ virtual mozilla::RefPtr GetSourceSurfaceForSurface(mozilla::gfx::DrawTarget *aTarget, gfxASurface *aSurface); virtual mozilla::TemporaryRef GetScaledFontForFont(mozilla::gfx::DrawTarget* aTarget, gfxFont *aFont); /* * Cairo doesn't give us a way to create a surface pointing to a context * without marking it as copy on write. For canvas we want to create * a surface that points to what is currently being drawn by a canvas * without a copy thus we need to create a special case. This works on * most platforms with GetThebesSurfaceForDrawTarget but fails on Mac * because when we create the surface we vm_copy the memory and never * notify the context that the canvas has drawn to it thus we end up * with a static snapshot. * * This function guarantes that the gfxASurface reflects the DrawTarget. */ virtual already_AddRefed CreateThebesSurfaceAliasForDrawTarget_hack(mozilla::gfx::DrawTarget *aTarget) { // Overwrite me on platform where GetThebesSurfaceForDrawTarget returns // a snapshot of the draw target. return GetThebesSurfaceForDrawTarget(aTarget); } virtual already_AddRefed GetThebesSurfaceForDrawTarget(mozilla::gfx::DrawTarget *aTarget); virtual mozilla::RefPtr CreateOffscreenDrawTarget(const mozilla::gfx::IntSize& aSize, mozilla::gfx::SurfaceFormat aFormat); virtual mozilla::RefPtr CreateDrawTargetForData(unsigned char* aData, const mozilla::gfx::IntSize& aSize, int32_t aStride, mozilla::gfx::SurfaceFormat aFormat); bool SupportsAzureContent() { return GetContentBackend() != mozilla::gfx::BACKEND_NONE; } void GetAzureBackendInfo(mozilla::widget::InfoObject &aObj) { aObj.DefineProperty("AzureCanvasBackend", GetBackendName(mPreferredCanvasBackend)); aObj.DefineProperty("AzureFallbackCanvasBackend", GetBackendName(mFallbackCanvasBackend)); aObj.DefineProperty("AzureContentBackend", GetBackendName(mContentBackend)); } mozilla::gfx::BackendType GetPreferredCanvasBackend() { return mPreferredCanvasBackend; } /* * Font bits */ virtual void SetupClusterBoundaries(gfxTextRun *aTextRun, const PRUnichar *aString); /** * Fill aListOfFonts with the results of querying the list of font names * that correspond to the given language group or generic font family * (or both, or neither). */ virtual nsresult GetFontList(nsIAtom *aLangGroup, const nsACString& aGenericFamily, nsTArray& aListOfFonts); /** * Rebuilds the any cached system font lists */ virtual nsresult UpdateFontList(); /** * Create the platform font-list object (gfxPlatformFontList concrete subclass). * This function is responsible to create the appropriate subclass of * gfxPlatformFontList *and* to call its InitFontList() method. */ virtual gfxPlatformFontList *CreatePlatformFontList() { NS_NOTREACHED("oops, this platform doesn't have a gfxPlatformFontList implementation"); return nullptr; } /** * Font name resolver, this returns actual font name(s) by the callback * function. If the font doesn't exist, the callback function is not called. * If the callback function returns false, the aAborted value is set to * true, otherwise, false. */ typedef bool (*FontResolverCallback) (const nsAString& aName, void *aClosure); virtual nsresult ResolveFontName(const nsAString& aFontName, FontResolverCallback aCallback, void *aClosure, bool& aAborted) = 0; /** * Resolving a font name to family name. The result MUST be in the result of GetFontList(). * If the name doesn't in the system, aFamilyName will be empty string, but not failed. */ virtual nsresult GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName) = 0; /** * Create the appropriate platform font group */ virtual gfxFontGroup *CreateFontGroup(const nsAString& aFamilies, const gfxFontStyle *aStyle, gfxUserFontSet *aUserFontSet) = 0; /** * Look up a local platform font using the full font face name. * (Needed to support @font-face src local().) * Ownership of the returned gfxFontEntry is passed to the caller, * who must either AddRef() or delete. */ virtual gfxFontEntry* LookupLocalFont(const gfxProxyFontEntry *aProxyEntry, const nsAString& aFontName) { return nullptr; } /** * Activate a platform font. (Needed to support @font-face src url().) * aFontData is a NS_Malloc'ed block that must be freed by this function * (or responsibility passed on) when it is no longer needed; the caller * will NOT free it. * Ownership of the returned gfxFontEntry is passed to the caller, * who must either AddRef() or delete. */ virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry, const uint8_t *aFontData, uint32_t aLength); /** * Whether to allow downloadable fonts via @font-face rules */ bool DownloadableFontsEnabled(); /** * True when hinting should be enabled. This setting shouldn't * change per gecko process, while the process is live. If so the * results are not defined. * * NB: this bit is only honored by the FT2 backend, currently. */ virtual bool FontHintingEnabled() { return true; } /** * True when zooming should not require reflow, so glyph metrics and * positioning should not be adjusted for device pixels. * If this is TRUE, then FontHintingEnabled() should be FALSE, * but the converse is not necessarily required; in particular, * B2G always has FontHintingEnabled FALSE, but RequiresLinearZoom * is only true for the browser process, not Gaia or other apps. * * Like FontHintingEnabled (above), this setting shouldn't * change per gecko process, while the process is live. If so the * results are not defined. * * NB: this bit is only honored by the FT2 backend, currently. */ virtual bool RequiresLinearZoom() { return false; } bool UsesSubpixelAATextRendering() { #ifdef MOZ_GFX_OPTIMIZE_MOBILE return false; #endif return true; } /** * Whether to check all font cmaps during system font fallback */ bool UseCmapsDuringSystemFallback(); #ifdef MOZ_GRAPHITE /** * Whether to use the SIL Graphite rendering engine * (for fonts that include Graphite tables) */ bool UseGraphiteShaping(); #endif /** * Whether to use the harfbuzz shaper (depending on script complexity). * * This allows harfbuzz to be enabled selectively via the preferences. */ bool UseHarfBuzzForScript(int32_t aScriptCode); // check whether format is supported on a platform or not (if unclear, returns true) virtual bool IsFontFormatSupported(nsIURI *aFontURI, uint32_t aFormatFlags) { return false; } void GetPrefFonts(nsIAtom *aLanguage, nsString& array, bool aAppendUnicode = true); // in some situations, need to make decisions about ambiguous characters, may need to look at multiple pref langs void GetLangPrefs(eFontPrefLang aPrefLangs[], uint32_t &aLen, eFontPrefLang aCharLang, eFontPrefLang aPageLang); /** * Iterate over pref fonts given a list of lang groups. For a single lang * group, multiple pref fonts are possible. If error occurs, returns false, * true otherwise. Callback returns false to abort process. */ typedef bool (*PrefFontCallback) (eFontPrefLang aLang, const nsAString& aName, void *aClosure); static bool ForEachPrefFont(eFontPrefLang aLangArray[], uint32_t aLangArrayLen, PrefFontCallback aCallback, void *aClosure); // convert a lang group to enum constant (i.e. "zh-TW" ==> eFontPrefLang_ChineseTW) static eFontPrefLang GetFontPrefLangFor(const char* aLang); // convert a lang group atom to enum constant static eFontPrefLang GetFontPrefLangFor(nsIAtom *aLang); // convert a enum constant to lang group string (i.e. eFontPrefLang_ChineseTW ==> "zh-TW") static const char* GetPrefLangName(eFontPrefLang aLang); // map a Unicode range (based on char code) to a font language for Preferences static eFontPrefLang GetFontPrefLangFor(uint8_t aUnicodeRange); // returns true if a pref lang is CJK static bool IsLangCJK(eFontPrefLang aLang); // helper method to add a pref lang to an array, if not already in array static void AppendPrefLang(eFontPrefLang aPrefLangs[], uint32_t& aLen, eFontPrefLang aAddLang); // returns a list of commonly used fonts for a given character // these are *possible* matches, no cmap-checking is done at this level virtual void GetCommonFallbackFonts(const uint32_t /*aCh*/, int32_t /*aRunScript*/, nsTArray& /*aFontList*/) { // platform-specific override, by default do nothing } // Break large OMTC tiled thebes layer painting into small paints. static bool UseProgressiveTilePainting(); // When a critical display-port is set, render the visible area outside of // it into a buffer at a lower precision. Requires tiled buffers. static bool UseLowPrecisionBuffer(); // Retrieve the resolution that a low precision buffer should render at. static float GetLowPrecisionResolution(); // Retain some invalid tiles when the valid region of a layer changes and // excludes previously valid tiles. static bool UseReusableTileStore(); static bool OffMainThreadCompositingEnabled(); /** * Are we going to try color management? */ static eCMSMode GetCMSMode(); /** * Determines the rendering intent for color management. * * If the value in the pref gfx.color_management.rendering_intent is a * valid rendering intent as defined in gfx/qcms/qcms.h, that * value is returned. Otherwise, -1 is returned and the embedded intent * should be used. * * See bug 444014 for details. */ static int GetRenderingIntent(); /** * Convert a pixel using a cms transform in an endian-aware manner. * * Sets 'out' to 'in' if transform is NULL. */ static void TransformPixel(const gfxRGBA& in, gfxRGBA& out, qcms_transform *transform); /** * Return the output device ICC profile. */ static qcms_profile* GetCMSOutputProfile(); /** * Return the sRGB ICC profile. */ static qcms_profile* GetCMSsRGBProfile(); /** * Return sRGB -> output device transform. */ static qcms_transform* GetCMSRGBTransform(); /** * Return output -> sRGB device transform. */ static qcms_transform* GetCMSInverseRGBTransform(); /** * Return sRGBA -> output device transform. */ static qcms_transform* GetCMSRGBATransform(); virtual void FontsPrefsChanged(const char *aPref); void OrientationSyncPrefsObserverChanged(); int32_t GetBidiNumeralOption(); /** * Returns a 1x1 surface that can be used to create graphics contexts * for measuring text etc as if they will be rendered to the screen */ gfxASurface* ScreenReferenceSurface() { return mScreenReferenceSurface; } virtual mozilla::gfx::SurfaceFormat Optimal2DFormatForContent(gfxASurface::gfxContentType aContent); virtual gfxImageFormat OptimalFormatForContent(gfxASurface::gfxContentType aContent); virtual gfxImageFormat GetOffscreenFormat() { return gfxASurface::ImageFormatRGB24; } /** * Returns a logger if one is available and logging is enabled */ static PRLogModuleInfo* GetLog(eGfxLog aWhichLog); bool WorkAroundDriverBugs() const { return mWorkAroundDriverBugs; } virtual int GetScreenDepth() const; bool WidgetUpdateFlashing() const { return mWidgetUpdateFlashing; } uint32_t GetOrientationSyncMillis() const; protected: gfxPlatform(); virtual ~gfxPlatform(); void AppendCJKPrefLangs(eFontPrefLang aPrefLangs[], uint32_t &aLen, eFontPrefLang aCharLang, eFontPrefLang aPageLang); /** * Helper method, creates a draw target for a specific Azure backend. * Used by CreateOffscreenDrawTarget. */ mozilla::RefPtr CreateDrawTargetForBackend(mozilla::gfx::BackendType aBackend, const mozilla::gfx::IntSize& aSize, mozilla::gfx::SurfaceFormat aFormat); /** * Initialise the preferred and fallback canvas backends * aBackendBitmask specifies the backends which are acceptable to the caller. * The backend used is determined by aBackendBitmask and the order specified * by the gfx.canvas.azure.backends pref. */ void InitBackendPrefs(uint32_t aCanvasBitmask, uint32_t aContentBitmask); /** * returns the first backend named in the pref gfx.canvas.azure.backends * which is a component of aBackendBitmask, a bitmask of backend types */ static mozilla::gfx::BackendType GetCanvasBackendPref(uint32_t aBackendBitmask); /** * returns the first backend named in the pref gfx.content.azure.backend * which is a component of aBackendBitmask, a bitmask of backend types */ static mozilla::gfx::BackendType GetContentBackendPref(uint32_t aBackendBitmask); /** * If aEnabledPrefName is non-null, checks the aEnabledPrefName pref and * returns BACKEND_NONE if the pref is not enabled. * Otherwise it will return the first backend named in aBackendPrefName * allowed by aBackendBitmask, a bitmask of backend types. */ static mozilla::gfx::BackendType GetBackendPref(const char* aEnabledPrefName, const char* aBackendPrefName, uint32_t aBackendBitmask); /** * Decode the backend enumberation from a string. */ static mozilla::gfx::BackendType BackendTypeForName(const nsCString& aName); mozilla::gfx::BackendType GetContentBackend() { return mContentBackend; } int8_t mAllowDownloadableFonts; #ifdef MOZ_GRAPHITE int8_t mGraphiteShapingEnabled; #endif int8_t mBidiNumeralOption; // whether to always search font cmaps globally // when doing system font fallback int8_t mFallbackUsesCmaps; // which scripts should be shaped with harfbuzz int32_t mUseHarfBuzzScripts; private: /** * Start up Thebes. */ static void Init(); virtual qcms_profile* GetPlatformCMSOutputProfile(); nsRefPtr mScreenReferenceSurface; nsTArray mCJKPrefLangs; nsCOMPtr mSRGBOverrideObserver; nsCOMPtr mFontPrefsObserver; nsCOMPtr mOrientationSyncPrefsObserver; // The preferred draw target backend to use for canvas mozilla::gfx::BackendType mPreferredCanvasBackend; // The fallback draw target backend to use for canvas, if the preferred backend fails mozilla::gfx::BackendType mFallbackCanvasBackend; // The backend to use for content mozilla::gfx::BackendType mContentBackend; mozilla::widget::GfxInfoCollector mAzureCanvasBackendCollector; bool mWorkAroundDriverBugs; mozilla::RefPtr mRecorder; bool mWidgetUpdateFlashing; uint32_t mOrientationSyncMillis; }; #endif /* GFX_PLATFORM_H */