mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
617 lines
22 KiB
C++
617 lines
22 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_PLATFORM_H
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#define GFX_PLATFORM_H
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#include "prlog.h"
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#include "nsTArray.h"
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#include "nsStringGlue.h"
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#include "nsIObserver.h"
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#include "gfxTypes.h"
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#include "gfxASurface.h"
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#include "gfxColor.h"
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#include "qcms.h"
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#include "gfx2DGlue.h"
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#include "mozilla/RefPtr.h"
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#include "GfxInfoCollector.h"
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#ifdef XP_OS2
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#undef OS2EMX_PLAIN_CHAR
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#endif
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class gfxImageSurface;
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class gfxFont;
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class gfxFontGroup;
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struct gfxFontStyle;
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class gfxUserFontSet;
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class gfxFontEntry;
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class gfxProxyFontEntry;
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class gfxPlatformFontList;
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class gfxTextRun;
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class nsIURI;
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class nsIAtom;
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extern cairo_user_data_key_t kDrawTarget;
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// pref lang id's for font prefs
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// !!! needs to match the list of pref font.default.xx entries listed in all.js !!!
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// !!! don't use as bit mask, this may grow larger !!!
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enum eFontPrefLang {
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eFontPrefLang_Western = 0,
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eFontPrefLang_CentEuro = 1,
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eFontPrefLang_Japanese = 2,
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eFontPrefLang_ChineseTW = 3,
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eFontPrefLang_ChineseCN = 4,
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eFontPrefLang_ChineseHK = 5,
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eFontPrefLang_Korean = 6,
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eFontPrefLang_Cyrillic = 7,
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eFontPrefLang_Baltic = 8,
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eFontPrefLang_Greek = 9,
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eFontPrefLang_Turkish = 10,
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eFontPrefLang_Thai = 11,
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eFontPrefLang_Hebrew = 12,
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eFontPrefLang_Arabic = 13,
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eFontPrefLang_Devanagari = 14,
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eFontPrefLang_Tamil = 15,
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eFontPrefLang_Armenian = 16,
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eFontPrefLang_Bengali = 17,
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eFontPrefLang_Canadian = 18,
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eFontPrefLang_Ethiopic = 19,
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eFontPrefLang_Georgian = 20,
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eFontPrefLang_Gujarati = 21,
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eFontPrefLang_Gurmukhi = 22,
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eFontPrefLang_Khmer = 23,
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eFontPrefLang_Malayalam = 24,
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eFontPrefLang_Oriya = 25,
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eFontPrefLang_Telugu = 26,
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eFontPrefLang_Kannada = 27,
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eFontPrefLang_Sinhala = 28,
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eFontPrefLang_Tibetan = 29,
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eFontPrefLang_LangCount = 30, // except Others and UserDefined.
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eFontPrefLang_Others = 30, // x-unicode
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eFontPrefLang_UserDefined = 31,
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eFontPrefLang_CJKSet = 32, // special code for CJK set
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eFontPrefLang_AllCount = 33
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};
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enum eCMSMode {
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eCMSMode_Off = 0, // No color management
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eCMSMode_All = 1, // Color manage everything
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eCMSMode_TaggedOnly = 2, // Color manage tagged Images Only
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eCMSMode_AllCount = 3
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};
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enum eGfxLog {
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// all font enumerations, localized names, fullname/psnames, cmap loads
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eGfxLog_fontlist = 0,
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// timing info on font initialization
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eGfxLog_fontinit = 1,
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// dump text runs, font matching, system fallback for content
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eGfxLog_textrun = 2,
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// dump text runs, font matching, system fallback for chrome
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eGfxLog_textrunui = 3,
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// dump cmap coverage data as they are loaded
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eGfxLog_cmapdata = 4
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};
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// when searching through pref langs, max number of pref langs
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const uint32_t kMaxLenPrefLangList = 32;
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#define UNINITIALIZED_VALUE (-1)
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typedef gfxASurface::gfxImageFormat gfxImageFormat;
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inline const char*
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GetBackendName(mozilla::gfx::BackendType aBackend)
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{
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switch (aBackend) {
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case mozilla::gfx::BACKEND_DIRECT2D:
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return "direct2d";
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case mozilla::gfx::BACKEND_COREGRAPHICS_ACCELERATED:
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return "quartz accelerated";
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case mozilla::gfx::BACKEND_COREGRAPHICS:
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return "quartz";
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case mozilla::gfx::BACKEND_CAIRO:
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return "cairo";
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case mozilla::gfx::BACKEND_SKIA:
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return "skia";
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case mozilla::gfx::BACKEND_RECORDING:
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return "recording";
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case mozilla::gfx::BACKEND_NONE:
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return "none";
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}
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MOZ_NOT_REACHED("Incomplete switch");
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}
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class THEBES_API gfxPlatform {
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public:
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/**
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* Return a pointer to the current active platform.
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* This is a singleton; it contains mostly convenience
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* functions to obtain platform-specific objects.
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*/
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static gfxPlatform *GetPlatform();
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/**
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* Shut down Thebes.
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* Init() arranges for this to be called at an appropriate time.
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*/
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static void Shutdown();
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/**
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* Create an offscreen surface of the given dimensions
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* and image format.
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*/
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virtual already_AddRefed<gfxASurface> CreateOffscreenSurface(const gfxIntSize& size,
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gfxASurface::gfxContentType contentType) = 0;
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/**
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* Create an offscreen surface of the given dimensions and image format which
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* can be converted to a gfxImageSurface without copying. If we can provide
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* a platform-hosted surface, then we will return that instead of an actual
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* gfxImageSurface.
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* Sub-classes should override this method if CreateOffscreenSurface returns a
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* surface which implements GetAsImageSurface
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*/
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virtual already_AddRefed<gfxASurface>
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CreateOffscreenImageSurface(const gfxIntSize& aSize,
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gfxASurface::gfxContentType aContentType);
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virtual already_AddRefed<gfxASurface> OptimizeImage(gfxImageSurface *aSurface,
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gfxASurface::gfxImageFormat format);
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virtual mozilla::RefPtr<mozilla::gfx::DrawTarget>
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CreateDrawTargetForSurface(gfxASurface *aSurface, const mozilla::gfx::IntSize& aSize);
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/*
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* Creates a SourceSurface for a gfxASurface. This function does no caching,
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* so the caller should cache the gfxASurface if it will be used frequently.
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* The returned surface keeps a reference to aTarget, so it is OK to keep the
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* surface, even if aTarget changes.
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* aTarget should not keep a reference to the returned surface because that
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* will cause a cycle.
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*/
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virtual mozilla::RefPtr<mozilla::gfx::SourceSurface>
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GetSourceSurfaceForSurface(mozilla::gfx::DrawTarget *aTarget, gfxASurface *aSurface);
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virtual mozilla::TemporaryRef<mozilla::gfx::ScaledFont>
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GetScaledFontForFont(mozilla::gfx::DrawTarget* aTarget, gfxFont *aFont);
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/*
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* Cairo doesn't give us a way to create a surface pointing to a context
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* without marking it as copy on write. For canvas we want to create
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* a surface that points to what is currently being drawn by a canvas
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* without a copy thus we need to create a special case. This works on
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* most platforms with GetThebesSurfaceForDrawTarget but fails on Mac
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* because when we create the surface we vm_copy the memory and never
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* notify the context that the canvas has drawn to it thus we end up
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* with a static snapshot.
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*
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* This function guarantes that the gfxASurface reflects the DrawTarget.
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*/
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virtual already_AddRefed<gfxASurface>
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CreateThebesSurfaceAliasForDrawTarget_hack(mozilla::gfx::DrawTarget *aTarget) {
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// Overwrite me on platform where GetThebesSurfaceForDrawTarget returns
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// a snapshot of the draw target.
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return GetThebesSurfaceForDrawTarget(aTarget);
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}
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virtual already_AddRefed<gfxASurface>
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GetThebesSurfaceForDrawTarget(mozilla::gfx::DrawTarget *aTarget);
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virtual mozilla::RefPtr<mozilla::gfx::DrawTarget>
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CreateOffscreenDrawTarget(const mozilla::gfx::IntSize& aSize, mozilla::gfx::SurfaceFormat aFormat);
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virtual mozilla::RefPtr<mozilla::gfx::DrawTarget>
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CreateDrawTargetForData(unsigned char* aData, const mozilla::gfx::IntSize& aSize,
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int32_t aStride, mozilla::gfx::SurfaceFormat aFormat);
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bool SupportsAzureContent() {
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return GetContentBackend() != mozilla::gfx::BACKEND_NONE;
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}
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void GetAzureBackendInfo(mozilla::widget::InfoObject &aObj) {
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aObj.DefineProperty("AzureCanvasBackend", GetBackendName(mPreferredCanvasBackend));
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aObj.DefineProperty("AzureFallbackCanvasBackend", GetBackendName(mFallbackCanvasBackend));
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aObj.DefineProperty("AzureContentBackend", GetBackendName(mContentBackend));
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}
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mozilla::gfx::BackendType GetPreferredCanvasBackend() {
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return mPreferredCanvasBackend;
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}
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/*
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* Font bits
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*/
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virtual void SetupClusterBoundaries(gfxTextRun *aTextRun, const PRUnichar *aString);
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/**
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* Fill aListOfFonts with the results of querying the list of font names
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* that correspond to the given language group or generic font family
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* (or both, or neither).
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*/
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virtual nsresult GetFontList(nsIAtom *aLangGroup,
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const nsACString& aGenericFamily,
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nsTArray<nsString>& aListOfFonts);
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/**
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* Rebuilds the any cached system font lists
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*/
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virtual nsresult UpdateFontList();
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/**
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* Create the platform font-list object (gfxPlatformFontList concrete subclass).
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* This function is responsible to create the appropriate subclass of
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* gfxPlatformFontList *and* to call its InitFontList() method.
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*/
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virtual gfxPlatformFontList *CreatePlatformFontList() {
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NS_NOTREACHED("oops, this platform doesn't have a gfxPlatformFontList implementation");
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return nullptr;
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}
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/**
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* Font name resolver, this returns actual font name(s) by the callback
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* function. If the font doesn't exist, the callback function is not called.
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* If the callback function returns false, the aAborted value is set to
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* true, otherwise, false.
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*/
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typedef bool (*FontResolverCallback) (const nsAString& aName,
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void *aClosure);
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virtual nsresult ResolveFontName(const nsAString& aFontName,
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FontResolverCallback aCallback,
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void *aClosure,
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bool& aAborted) = 0;
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/**
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* Resolving a font name to family name. The result MUST be in the result of GetFontList().
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* If the name doesn't in the system, aFamilyName will be empty string, but not failed.
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*/
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virtual nsresult GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName) = 0;
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/**
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* Create the appropriate platform font group
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*/
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virtual gfxFontGroup *CreateFontGroup(const nsAString& aFamilies,
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const gfxFontStyle *aStyle,
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gfxUserFontSet *aUserFontSet) = 0;
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/**
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* Look up a local platform font using the full font face name.
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* (Needed to support @font-face src local().)
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* Ownership of the returned gfxFontEntry is passed to the caller,
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* who must either AddRef() or delete.
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*/
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virtual gfxFontEntry* LookupLocalFont(const gfxProxyFontEntry *aProxyEntry,
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const nsAString& aFontName)
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{ return nullptr; }
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/**
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* Activate a platform font. (Needed to support @font-face src url().)
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* aFontData is a NS_Malloc'ed block that must be freed by this function
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* (or responsibility passed on) when it is no longer needed; the caller
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* will NOT free it.
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* Ownership of the returned gfxFontEntry is passed to the caller,
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* who must either AddRef() or delete.
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*/
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virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry,
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const uint8_t *aFontData,
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uint32_t aLength);
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/**
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* Whether to allow downloadable fonts via @font-face rules
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*/
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bool DownloadableFontsEnabled();
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/**
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* Whether to sanitize downloaded fonts using the OTS library
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*/
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bool SanitizeDownloadedFonts();
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/**
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* True when hinting should be enabled. This setting shouldn't
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* change per gecko process, while the process is live. If so the
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* results are not defined.
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*
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* NB: this bit is only honored by the FT2 backend, currently.
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*/
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virtual bool FontHintingEnabled() { return true; }
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/**
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* True when zooming should not require reflow, so glyph metrics and
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* positioning should not be adjusted for device pixels.
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* If this is TRUE, then FontHintingEnabled() should be FALSE,
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* but the converse is not necessarily required; in particular,
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* B2G always has FontHintingEnabled FALSE, but RequiresLinearZoom
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* is only true for the browser process, not Gaia or other apps.
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*
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* Like FontHintingEnabled (above), this setting shouldn't
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* change per gecko process, while the process is live. If so the
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* results are not defined.
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*
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* NB: this bit is only honored by the FT2 backend, currently.
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*/
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virtual bool RequiresLinearZoom() { return false; }
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bool UsesSubpixelAATextRendering() {
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#ifdef MOZ_GFX_OPTIMIZE_MOBILE
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return false;
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#endif
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return true;
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}
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/**
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* Whether to check all font cmaps during system font fallback
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*/
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bool UseCmapsDuringSystemFallback();
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#ifdef MOZ_GRAPHITE
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/**
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* Whether to use the SIL Graphite rendering engine
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* (for fonts that include Graphite tables)
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*/
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bool UseGraphiteShaping();
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#endif
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/**
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* Whether to use the harfbuzz shaper (depending on script complexity).
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*
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* This allows harfbuzz to be enabled selectively via the preferences.
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*/
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bool UseHarfBuzzForScript(int32_t aScriptCode);
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// check whether format is supported on a platform or not (if unclear, returns true)
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virtual bool IsFontFormatSupported(nsIURI *aFontURI, uint32_t aFormatFlags) { return false; }
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void GetPrefFonts(nsIAtom *aLanguage, nsString& array, bool aAppendUnicode = true);
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// in some situations, need to make decisions about ambiguous characters, may need to look at multiple pref langs
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void GetLangPrefs(eFontPrefLang aPrefLangs[], uint32_t &aLen, eFontPrefLang aCharLang, eFontPrefLang aPageLang);
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/**
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* Iterate over pref fonts given a list of lang groups. For a single lang
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* group, multiple pref fonts are possible. If error occurs, returns false,
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* true otherwise. Callback returns false to abort process.
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*/
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typedef bool (*PrefFontCallback) (eFontPrefLang aLang, const nsAString& aName,
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void *aClosure);
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static bool ForEachPrefFont(eFontPrefLang aLangArray[], uint32_t aLangArrayLen,
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PrefFontCallback aCallback,
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void *aClosure);
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// convert a lang group to enum constant (i.e. "zh-TW" ==> eFontPrefLang_ChineseTW)
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static eFontPrefLang GetFontPrefLangFor(const char* aLang);
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// convert a lang group atom to enum constant
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static eFontPrefLang GetFontPrefLangFor(nsIAtom *aLang);
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// convert a enum constant to lang group string (i.e. eFontPrefLang_ChineseTW ==> "zh-TW")
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static const char* GetPrefLangName(eFontPrefLang aLang);
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// map a Unicode range (based on char code) to a font language for Preferences
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static eFontPrefLang GetFontPrefLangFor(uint8_t aUnicodeRange);
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// returns true if a pref lang is CJK
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static bool IsLangCJK(eFontPrefLang aLang);
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// helper method to add a pref lang to an array, if not already in array
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static void AppendPrefLang(eFontPrefLang aPrefLangs[], uint32_t& aLen, eFontPrefLang aAddLang);
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// returns a list of commonly used fonts for a given character
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// these are *possible* matches, no cmap-checking is done at this level
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virtual void GetCommonFallbackFonts(const uint32_t /*aCh*/,
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int32_t /*aRunScript*/,
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nsTArray<const char*>& /*aFontList*/)
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{
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// platform-specific override, by default do nothing
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}
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// Break large OMTC tiled thebes layer painting into small paints.
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static bool UseProgressiveTilePainting();
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// When a critical display-port is set, render the visible area outside of
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// it into a buffer at a lower precision. Requires tiled buffers.
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static bool UseLowPrecisionBuffer();
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// Retrieve the resolution that a low precision buffer should render at.
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static float GetLowPrecisionResolution();
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// Retain some invalid tiles when the valid region of a layer changes and
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// excludes previously valid tiles.
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static bool UseReusableTileStore();
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static bool OffMainThreadCompositingEnabled();
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/**
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* Are we going to try color management?
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*/
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static eCMSMode GetCMSMode();
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/**
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* Determines the rendering intent for color management.
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*
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* If the value in the pref gfx.color_management.rendering_intent is a
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* valid rendering intent as defined in gfx/qcms/qcms.h, that
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* value is returned. Otherwise, -1 is returned and the embedded intent
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* should be used.
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*
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* See bug 444014 for details.
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*/
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static int GetRenderingIntent();
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/**
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* Convert a pixel using a cms transform in an endian-aware manner.
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*
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* Sets 'out' to 'in' if transform is NULL.
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*/
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static void TransformPixel(const gfxRGBA& in, gfxRGBA& out, qcms_transform *transform);
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/**
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* Return the output device ICC profile.
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*/
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static qcms_profile* GetCMSOutputProfile();
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/**
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* Return the sRGB ICC profile.
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*/
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static qcms_profile* GetCMSsRGBProfile();
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/**
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* Return sRGB -> output device transform.
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*/
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static qcms_transform* GetCMSRGBTransform();
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/**
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* Return output -> sRGB device transform.
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*/
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static qcms_transform* GetCMSInverseRGBTransform();
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/**
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* Return sRGBA -> output device transform.
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*/
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static qcms_transform* GetCMSRGBATransform();
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virtual void FontsPrefsChanged(const char *aPref);
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void OrientationSyncPrefsObserverChanged();
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int32_t GetBidiNumeralOption();
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/**
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* Returns a 1x1 surface that can be used to create graphics contexts
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* for measuring text etc as if they will be rendered to the screen
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*/
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gfxASurface* ScreenReferenceSurface() { return mScreenReferenceSurface; }
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virtual mozilla::gfx::SurfaceFormat Optimal2DFormatForContent(gfxASurface::gfxContentType aContent);
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virtual gfxImageFormat OptimalFormatForContent(gfxASurface::gfxContentType aContent);
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virtual gfxImageFormat GetOffscreenFormat()
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{ return gfxASurface::ImageFormatRGB24; }
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/**
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* Returns a logger if one is available and logging is enabled
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*/
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static PRLogModuleInfo* GetLog(eGfxLog aWhichLog);
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bool WorkAroundDriverBugs() const { return mWorkAroundDriverBugs; }
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virtual int GetScreenDepth() const;
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bool WidgetUpdateFlashing() const { return mWidgetUpdateFlashing; }
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uint32_t GetOrientationSyncMillis() const;
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protected:
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gfxPlatform();
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virtual ~gfxPlatform();
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void AppendCJKPrefLangs(eFontPrefLang aPrefLangs[], uint32_t &aLen,
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eFontPrefLang aCharLang, eFontPrefLang aPageLang);
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/**
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* Helper method, creates a draw target for a specific Azure backend.
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* Used by CreateOffscreenDrawTarget.
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*/
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mozilla::RefPtr<mozilla::gfx::DrawTarget>
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CreateDrawTargetForBackend(mozilla::gfx::BackendType aBackend,
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const mozilla::gfx::IntSize& aSize,
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mozilla::gfx::SurfaceFormat aFormat);
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/**
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* Initialise the preferred and fallback canvas backends
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* aBackendBitmask specifies the backends which are acceptable to the caller.
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* The backend used is determined by aBackendBitmask and the order specified
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* by the gfx.canvas.azure.backends pref.
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*/
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void InitBackendPrefs(uint32_t aCanvasBitmask, uint32_t aContentBitmask);
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/**
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* returns the first backend named in the pref gfx.canvas.azure.backends
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* which is a component of aBackendBitmask, a bitmask of backend types
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*/
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static mozilla::gfx::BackendType GetCanvasBackendPref(uint32_t aBackendBitmask);
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/**
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* returns the first backend named in the pref gfx.content.azure.backend
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* which is a component of aBackendBitmask, a bitmask of backend types
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*/
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static mozilla::gfx::BackendType GetContentBackendPref(uint32_t aBackendBitmask);
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/**
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* If aEnabledPrefName is non-null, checks the aEnabledPrefName pref and
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* returns BACKEND_NONE if the pref is not enabled.
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* Otherwise it will return the first backend named in aBackendPrefName
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* allowed by aBackendBitmask, a bitmask of backend types.
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*/
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static mozilla::gfx::BackendType GetBackendPref(const char* aEnabledPrefName,
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const char* aBackendPrefName,
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uint32_t aBackendBitmask);
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/**
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* Decode the backend enumberation from a string.
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*/
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static mozilla::gfx::BackendType BackendTypeForName(const nsCString& aName);
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mozilla::gfx::BackendType GetContentBackend() {
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return mContentBackend;
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}
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int8_t mAllowDownloadableFonts;
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int8_t mDownloadableFontsSanitize;
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#ifdef MOZ_GRAPHITE
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int8_t mGraphiteShapingEnabled;
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#endif
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int8_t mBidiNumeralOption;
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// whether to always search font cmaps globally
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// when doing system font fallback
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int8_t mFallbackUsesCmaps;
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// which scripts should be shaped with harfbuzz
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int32_t mUseHarfBuzzScripts;
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private:
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/**
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* Start up Thebes.
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*/
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static void Init();
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virtual qcms_profile* GetPlatformCMSOutputProfile();
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nsRefPtr<gfxASurface> mScreenReferenceSurface;
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nsTArray<uint32_t> mCJKPrefLangs;
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nsCOMPtr<nsIObserver> mSRGBOverrideObserver;
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nsCOMPtr<nsIObserver> mFontPrefsObserver;
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nsCOMPtr<nsIObserver> mOrientationSyncPrefsObserver;
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// The preferred draw target backend to use for canvas
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mozilla::gfx::BackendType mPreferredCanvasBackend;
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// The fallback draw target backend to use for canvas, if the preferred backend fails
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mozilla::gfx::BackendType mFallbackCanvasBackend;
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// The backend to use for content
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mozilla::gfx::BackendType mContentBackend;
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mozilla::widget::GfxInfoCollector<gfxPlatform> mAzureCanvasBackendCollector;
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bool mWorkAroundDriverBugs;
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mozilla::RefPtr<mozilla::gfx::DrawEventRecorder> mRecorder;
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bool mWidgetUpdateFlashing;
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uint32_t mOrientationSyncMillis;
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};
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#endif /* GFX_PLATFORM_H */
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