зеркало из https://github.com/mozilla/pjs.git
382 строки
13 KiB
C++
382 строки
13 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Foundation code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Vladimir Vukicevic <vladimir@pobox.com>
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* Masayuki Nakano <masayuki@d-toybox.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef GFX_PLATFORM_H
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#define GFX_PLATFORM_H
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#include "prtypes.h"
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#include "nsTArray.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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#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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class nsIPrefBranch;
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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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// when searching through pref langs, max number of pref langs
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const PRUint32 kMaxLenPrefLangList = 32;
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#define UNINITIALIZED_VALUE (-1)
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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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* Start up Thebes. This can fail.
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*/
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static nsresult Init();
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/**
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* Clean up static objects to shut down thebes.
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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::gfxImageFormat imageFormat) = 0;
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virtual already_AddRefed<gfxASurface> OptimizeImage(gfxImageSurface *aSurface,
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gfxASurface::gfxImageFormat format);
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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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*/
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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 nsnull;
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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 PR_FALSE, the aAborted value is set to
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* PR_TRUE, otherwise, PR_FALSE.
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*/
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typedef PRBool (*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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PRBool& 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 nsnull; }
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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 PRUint8 *aFontData,
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PRUint32 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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virtual PRBool DownloadableFontsEnabled();
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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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* Current "harfbuzz level" options:
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* <= 0 will never use the harfbuzz shaper;
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* = 1 will use it for "simple" scripts (Latin, Cyrillic, CJK, etc);
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* >= 2 will use it for all scripts, including those requiring complex
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* shaping for correct rendering (Arabic, Indic, etc).
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*
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* Depending how harfbuzz complex-script support evolves, we may want to
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* update this mechanism - e.g., separating complex-bidi from Indic,
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* or other distinctions.
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*/
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PRInt8 UseHarfBuzzLevel();
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// check whether format is supported on a platform or not (if unclear, returns true)
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virtual PRBool IsFontFormatSupported(nsIURI *aFontURI, PRUint32 aFormatFlags) { return PR_FALSE; }
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void GetPrefFonts(nsIAtom *aLanguage, nsString& array, PRBool aAppendUnicode = PR_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[], PRUint32 &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 PR_FALSE,
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* PR_TRUE otherwise. Callback returns PR_FALSE to abort process.
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*/
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typedef PRBool (*PrefFontCallback) (eFontPrefLang aLang, const nsAString& aName,
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void *aClosure);
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static PRBool ForEachPrefFont(eFontPrefLang aLangArray[], PRUint32 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(PRUint8 aUnicodeRange);
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// returns true if a pref lang is CJK
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static PRBool 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[], PRUint32& aLen, eFontPrefLang aAddLang);
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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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/**
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* Return display DPI
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*/
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static PRInt32 GetDPI() {
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if (sDPI < 0) {
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gfxPlatform::GetPlatform()->InitDisplayCaps();
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}
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NS_ASSERTION(sDPI > 0, "Something is wrong");
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return sDPI;
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}
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virtual void FontsPrefsChanged(nsIPrefBranch *aPrefBranch, const char *aPref);
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protected:
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gfxPlatform();
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virtual ~gfxPlatform();
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static PRBool GetBoolPref(const char *aPref, PRBool aDefault);
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void AppendCJKPrefLangs(eFontPrefLang aPrefLangs[], PRUint32 &aLen,
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eFontPrefLang aCharLang, eFontPrefLang aPageLang);
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/**
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* Initialize any needed display metrics (such as DPI)
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*/
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virtual void InitDisplayCaps();
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static PRInt32 sDPI;
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PRBool mAllowDownloadableFonts;
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// whether to use the HarfBuzz layout engine
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PRInt8 mUseHarfBuzzLevel;
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private:
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virtual qcms_profile* GetPlatformCMSOutputProfile();
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nsTArray<PRUint32> mCJKPrefLangs;
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nsCOMPtr<nsIObserver> overrideObserver;
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};
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#endif /* GFX_PLATFORM_H */
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