macOS: Move QMacCGContext helper into QtGui

The implementation was duplicated and spread out between QMacStyle,
QMacPaintEngine, and the Cocoa platform plugin.

Moving it into QtGui allows using it on other Apple platform.

Change-Id: Iadcbd71998204887e116271c575037789b6e2163
Reviewed-by: Jake Petroules <jake.petroules@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>

1 files changed, 2 insertions, 136 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.mm b/src/plugins/platforms/cocoa/qcocoahelpers.mm
index 6920f75887..21ffd8599f 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.mm
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.mm
@@ -47,6 +47,7 @@
 #include <qpa/qplatformscreen.h>
 #include <private/qguiapplication_p.h>
 #include <private/qwindow_p.h>
+#include <QtGui/private/qcoregraphics_p.h>
 
 #ifndef QT_NO_WIDGETS
 #include <QtWidgets/QWidget>
@@ -402,97 +403,6 @@ void qt_mac_transformProccessToForegroundApplication()
         [[NSApplication sharedApplication] setActivationPolicy:NSApplicationActivationPolicyRegular];
     }
 }
-static CGColorSpaceRef m_genericColorSpace = 0;
-static QHash<CGDirectDisplayID, CGColorSpaceRef> m_displayColorSpaceHash;
-static bool m_postRoutineRegistered = false;
-
-CGColorSpaceRef qt_mac_genericColorSpace()
-{
-#if 0
-    if (!m_genericColorSpace) {
-        if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_4) {
-            m_genericColorSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
-        } else
-        {
-            m_genericColorSpace = CGColorSpaceCreateDeviceRGB();
-        }
-        if (!m_postRoutineRegistered) {
-            m_postRoutineRegistered = true;
-            qAddPostRoutine(QCoreGraphicsPaintEngine::cleanUpMacColorSpaces);
-        }
-    }
-    return m_genericColorSpace;
-#else
-    // Just return the main display colorspace for the moment.
-    return qt_mac_displayColorSpace(0);
-#endif
-}
-
-/*
-    Ideally, we should pass the widget in here, and use CGGetDisplaysWithRect() etc.
-    to support multiple displays correctly.
-*/
-CGColorSpaceRef qt_mac_displayColorSpace(const QWidget *widget)
-{
-    CGColorSpaceRef colorSpace;
-
-    CGDirectDisplayID displayID;
-    if (widget == 0) {
-        displayID = CGMainDisplayID();
-    } else {
-        displayID = CGMainDisplayID();
-        /*
-        ### get correct display
-        const QRect &qrect = widget->window()->geometry();
-        CGRect rect = CGRectMake(qrect.x(), qrect.y(), qrect.width(), qrect.height());
-        CGDisplayCount throwAway;
-        CGDisplayErr dErr = CGGetDisplaysWithRect(rect, 1, &displayID, &throwAway);
-        if (dErr != kCGErrorSuccess)
-            return macDisplayColorSpace(0); // fall back on main display
-        */
-    }
-    if ((colorSpace = m_displayColorSpaceHash.value(displayID)))
-        return colorSpace;
-
-    colorSpace = CGDisplayCopyColorSpace(displayID);
-    if (colorSpace == 0)
-        colorSpace = CGColorSpaceCreateDeviceRGB();
-
-    m_displayColorSpaceHash.insert(displayID, colorSpace);
-    if (!m_postRoutineRegistered) {
-        m_postRoutineRegistered = true;
-        void qt_mac_cleanUpMacColorSpaces();
-        qAddPostRoutine(qt_mac_cleanUpMacColorSpaces);
-    }
-    return colorSpace;
-}
-
-void qt_mac_cleanUpMacColorSpaces()
-{
-    if (m_genericColorSpace) {
-        CFRelease(m_genericColorSpace);
-        m_genericColorSpace = 0;
-    }
-    QHash<CGDirectDisplayID, CGColorSpaceRef>::const_iterator it = m_displayColorSpaceHash.constBegin();
-    while (it != m_displayColorSpaceHash.constEnd()) {
-        if (it.value())
-            CFRelease(it.value());
-        ++it;
-    }
-    m_displayColorSpaceHash.clear();
-}
-
-CGColorSpaceRef qt_mac_colorSpaceForDeviceType(const QPaintDevice *paintDevice)
-{
-#ifdef QT_NO_WIDGETS
-    Q_UNUSED(paintDevice)
-    return qt_mac_displayColorSpace(0);
-#else
-    bool isWidget = (paintDevice->devType() == QInternal::Widget);
-    return qt_mac_displayColorSpace(isWidget ? static_cast<const QWidget *>(paintDevice): 0);
-#endif
-
-}
 
 QString qt_mac_applicationName()
 {
@@ -599,49 +509,6 @@ QString qt_mac_removeAmpersandEscapes(QString s)
     return QPlatformTheme::removeMnemonics(s).trimmed();
 }
 
-/*! \internal
-
- Returns the CoreGraphics CGContextRef of the paint device. 0 is
- returned if it can't be obtained. It is the caller's responsibility to
- CGContextRelease the context when finished using it.
-
- \warning This function is only available on \macos.
- \warning This function is duplicated in qmacstyle_mac.mm
- */
-CGContextRef qt_mac_cg_context(QPaintDevice *pdev)
-{
-    // In Qt 5, QWidget and QPixmap (and QImage) paint devices are all QImages under the hood.
-    QImage *image = 0;
-    if (pdev->devType() == QInternal::Image) {
-        image = static_cast<QImage *>(pdev);
-    } else if (pdev->devType() == QInternal::Pixmap) {
-
-        const QPixmap *pm = static_cast<const QPixmap*>(pdev);
-        QPlatformPixmap *data = const_cast<QPixmap *>(pm)->data_ptr().data();
-        if (data && data->classId() == QPlatformPixmap::RasterClass) {
-            image = data->buffer();
-        } else {
-            qDebug("qt_mac_cg_context: Unsupported pixmap class");
-        }
-    } else if (pdev->devType() == QInternal::Widget) {
-        // TODO test: image = static_cast<QImage *>(static_cast<const QWidget *>(pdev)->backingStore()->paintDevice());
-        qDebug("qt_mac_cg_context: not implemented: Widget class");
-    }
-
-    if (!image)
-        return 0; // Context type not supported.
-
-    CGColorSpaceRef colorspace = qt_mac_colorSpaceForDeviceType(pdev);
-    uint flags = kCGImageAlphaPremultipliedFirst;
-    flags |= kCGBitmapByteOrder32Host;
-    CGContextRef ret = 0;
-    ret = CGBitmapContextCreate(image->bits(), image->width(), image->height(),
-                                8, image->bytesPerLine(), colorspace, flags);
-    CGContextTranslateCTM(ret, 0, image->height());
-    CGContextScaleCTM(ret, 1, -1);
-    return ret;
-}
-
 QPixmap qt_mac_toQPixmap(const NSImage *image, const QSizeF &size)
 {
     const NSSize pixmapSize = NSMakeSize(size.width(), size.height());
@@ -669,9 +536,8 @@ QImage qt_mac_toQImage(CGImageRef image)
     QImage ret(w, h, QImage::Format_ARGB32_Premultiplied);
     ret.fill(Qt::transparent);
     CGRect rect = CGRectMake(0, 0, w, h);
-    CGContextRef ctx = qt_mac_cg_context(&ret);
+    QMacCGContext ctx(&ret);
     qt_mac_drawCGImage(ctx, &rect, image);
-    CGContextRelease(ctx);
     return ret;
 }