gecko/gfx/thebes/gfxPlatformMac.cpp

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is thebes gfx code.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Vladimir Vukicevic <vladimir@pobox.com>
 *   Masayuki Nakano <masayuki@d-toybox.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "gfxPlatformMac.h"

#include "gfxImageSurface.h"
#include "gfxQuartzSurface.h"
#include "gfxQuartzImageSurface.h"

#include "gfxMacPlatformFontList.h"
#include "gfxMacFont.h"
#include "gfxCoreTextShaper.h"
#include "gfxUserFontSet.h"

#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsIPrefLocalizedString.h"
#include "nsServiceManagerUtils.h"
#include "nsCRT.h"
#include "nsTArray.h"
#include "nsUnicodeRange.h"

#include "qcms.h"

gfxPlatformMac::gfxPlatformMac()
{
    mOSXVersion = 0;
    mFontAntiAliasingThreshold = ReadAntiAliasingThreshold();
}

gfxPlatformMac::~gfxPlatformMac()
{
    gfxCoreTextShaper::Shutdown();
}

gfxPlatformFontList*
gfxPlatformMac::CreatePlatformFontList()
{
    return new gfxMacPlatformFontList();
}

already_AddRefed<gfxASurface>
gfxPlatformMac::CreateOffscreenSurface(const gfxIntSize& size,
                                       gfxASurface::gfxImageFormat imageFormat)
{
    gfxASurface *newSurface = nsnull;

    newSurface = new gfxQuartzSurface(size, imageFormat);

    NS_IF_ADDREF(newSurface);
    return newSurface;
}

already_AddRefed<gfxASurface>
gfxPlatformMac::OptimizeImage(gfxImageSurface *aSurface,
                              gfxASurface::gfxImageFormat format)
{
    const gfxIntSize& surfaceSize = aSurface->GetSize();
    nsRefPtr<gfxImageSurface> isurf = aSurface;

    if (format != aSurface->Format()) {
        isurf = new gfxImageSurface (surfaceSize, format);
        if (!isurf->CopyFrom (aSurface)) {
            // don't even bother doing anything more
            NS_ADDREF(aSurface);
            return aSurface;
        }
    }

    nsRefPtr<gfxASurface> ret = new gfxQuartzImageSurface(isurf);
    return ret.forget();
}

nsresult
gfxPlatformMac::ResolveFontName(const nsAString& aFontName,
                                FontResolverCallback aCallback,
                                void *aClosure, PRBool& aAborted)
{
    nsAutoString resolvedName;
    if (!gfxPlatformFontList::PlatformFontList()->
             ResolveFontName(aFontName, resolvedName)) {
        aAborted = PR_FALSE;
        return NS_OK;
    }
    aAborted = !(*aCallback)(resolvedName, aClosure);
    return NS_OK;
}

nsresult
gfxPlatformMac::GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName)
{
    gfxPlatformFontList::PlatformFontList()->GetStandardFamilyName(aFontName, aFamilyName);
    return NS_OK;
}

gfxFontGroup *
gfxPlatformMac::CreateFontGroup(const nsAString &aFamilies,
                                const gfxFontStyle *aStyle,
                                gfxUserFontSet *aUserFontSet)
{
    return new gfxFontGroup(aFamilies, aStyle, aUserFontSet);
}

// these will move to gfxPlatform once all platforms support the fontlist
gfxFontEntry* 
gfxPlatformMac::LookupLocalFont(const gfxProxyFontEntry *aProxyEntry,
                                const nsAString& aFontName)
{
    return gfxPlatformFontList::PlatformFontList()->LookupLocalFont(aProxyEntry, 
                                                                    aFontName);
}

gfxFontEntry* 
gfxPlatformMac::MakePlatformFont(const gfxProxyFontEntry *aProxyEntry,
                                 const PRUint8 *aFontData, PRUint32 aLength)
{
    // Ownership of aFontData is received here, and passed on to
    // gfxPlatformFontList::MakePlatformFont(), which must ensure the data
    // is released with NS_Free when no longer needed
    return gfxPlatformFontList::PlatformFontList()->MakePlatformFont(aProxyEntry,
                                                                     aFontData,
                                                                     aLength);
}

PRBool
gfxPlatformMac::IsFontFormatSupported(nsIURI *aFontURI, PRUint32 aFormatFlags)
{
    // check for strange format flags
    NS_ASSERTION(!(aFormatFlags & gfxUserFontSet::FLAG_FORMAT_NOT_USED),
                 "strange font format hint set");

    // accept supported formats
    if (aFormatFlags & (gfxUserFontSet::FLAG_FORMAT_WOFF     |
                        gfxUserFontSet::FLAG_FORMAT_OPENTYPE | 
                        gfxUserFontSet::FLAG_FORMAT_TRUETYPE | 
                        gfxUserFontSet::FLAG_FORMAT_TRUETYPE_AAT)) {
        return PR_TRUE;
    }

    // reject all other formats, known and unknown
    if (aFormatFlags != 0) {
        return PR_FALSE;
    }

    // no format hint set, need to look at data
    return PR_TRUE;
}

// these will also move to gfxPlatform once all platforms support the fontlist
nsresult
gfxPlatformMac::GetFontList(nsIAtom *aLangGroup,
                            const nsACString& aGenericFamily,
                            nsTArray<nsString>& aListOfFonts)
{
    gfxPlatformFontList::PlatformFontList()->GetFontList(aLangGroup, aGenericFamily, aListOfFonts);
    return NS_OK;
}

nsresult
gfxPlatformMac::UpdateFontList()
{
    gfxPlatformFontList::PlatformFontList()->UpdateFontList();
    return NS_OK;
}

PRInt32 
gfxPlatformMac::OSXVersion()
{
    if (!mOSXVersion) {
        // minor version is not accurate, use gestaltSystemVersionMajor, gestaltSystemVersionMinor, gestaltSystemVersionBugFix for these
        OSErr err = ::Gestalt(gestaltSystemVersion, reinterpret_cast<SInt32*>(&mOSXVersion));
        if (err != noErr) {
            //This should probably be changed when our minimum version changes
            NS_ERROR("Couldn't determine OS X version, assuming 10.4");
            mOSXVersion = MAC_OS_X_VERSION_10_4_HEX;
        }
    }
    return mOSXVersion;
}

PRUint32
gfxPlatformMac::ReadAntiAliasingThreshold()
{
    PRUint32 threshold = 0;  // default == no threshold
    
    // first read prefs flag to determine whether to use the setting or not
    PRBool useAntiAliasingThreshold = PR_FALSE;
    nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
    if (prefs) {
        PRBool enabled;
        nsresult rv =
            prefs->GetBoolPref("gfx.use_text_smoothing_setting", &enabled);
        if (NS_SUCCEEDED(rv)) {
            useAntiAliasingThreshold = enabled;
        }
    }
    
    // if the pref setting is disabled, return 0 which effectively disables this feature
    if (!useAntiAliasingThreshold)
        return threshold;
        
    // value set via Appearance pref panel, "Turn off text smoothing for font sizes xxx and smaller"
    CFNumberRef prefValue = (CFNumberRef)CFPreferencesCopyAppValue(CFSTR("AppleAntiAliasingThreshold"), kCFPreferencesCurrentApplication);

    if (prefValue) {
        if (!CFNumberGetValue(prefValue, kCFNumberIntType, &threshold)) {
            threshold = 0;
        }
        CFRelease(prefValue);
    }

    return threshold;
}

qcms_profile *
gfxPlatformMac::GetPlatformCMSOutputProfile()
{
    qcms_profile *profile = nsnull;
    CMProfileRef cmProfile;
    CMProfileLocation *location;
    UInt32 locationSize;

    /* There a number of different ways that we could try to get a color
       profile to use.  On 10.5 all of these methods seem to give the same
       results. On 10.6, the results are different and the following method,
       using CGMainDisplayID() seems to best match what we are looking for.
       Currently, both Google Chrome and Qt4 use a similar method.

       CMTypes.h describes CMDisplayIDType:
       "Data type for ColorSync DisplayID reference
        On 8 & 9 this is a AVIDType
	On X this is a CGSDisplayID"

       CGMainDisplayID gives us a CGDirectDisplayID which presumeably
       corresponds directly to a CGSDisplayID */
    CGDirectDisplayID displayID = CGMainDisplayID();

    CMError err = CMGetProfileByAVID(static_cast<CMDisplayIDType>(displayID), &cmProfile);
    if (err != noErr)
        return nsnull;

    // get the size of location
    err = NCMGetProfileLocation(cmProfile, NULL, &locationSize);
    if (err != noErr)
        return nsnull;

    // allocate enough room for location
    location = static_cast<CMProfileLocation*>(malloc(locationSize));
    if (!location)
        goto fail_close;

    err = NCMGetProfileLocation(cmProfile, location, &locationSize);
    if (err != noErr)
        goto fail_location;

    switch (location->locType) {
#ifndef __LP64__
    case cmFileBasedProfile: {
        FSRef fsRef;
        if (!FSpMakeFSRef(&location->u.fileLoc.spec, &fsRef)) {
            char path[512];
            if (!FSRefMakePath(&fsRef, reinterpret_cast<UInt8*>(path), sizeof(path))) {
                profile = qcms_profile_from_path(path);
#ifdef DEBUG_tor
                if (profile)
                    fprintf(stderr,
                            "ICM profile read from %s fileLoc successfully\n", path);
#endif
            }
        }
        break;
    }
#endif
    case cmPathBasedProfile:
        profile = qcms_profile_from_path(location->u.pathLoc.path);
#ifdef DEBUG_tor
        if (profile)
            fprintf(stderr,
                    "ICM profile read from %s pathLoc successfully\n",
                    device.u.pathLoc.path);
#endif
        break;
    default:
#ifdef DEBUG_tor
        fprintf(stderr, "Unhandled ColorSync profile location\n");
#endif
        break;
    }

fail_location:
    free(location);
fail_close:
    CMCloseProfile(cmProfile);
    return profile;
}