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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
// This file is included from qnsview.mm, and only used to organize the code
@implementation QT_MANGLE_NAMESPACE(QNSView) (Drawing)
- (void)initDrawing
{
self.wantsLayer = [self layerExplicitlyRequested]
|| [self shouldUseMetalLayer]
|| [self layerEnabledByMacOS];
// Enable high-DPI OpenGL for retina displays. Enabling has the side
// effect that Cocoa will start calling glViewport(0, 0, width, height),
// overriding any glViewport calls in application code. This is usually not a
// problem, except if the application wants to have a "custom" viewport.
// (like the hellogl example)
if (m_platformWindow->window()->supportsOpenGL()) {
self.wantsBestResolutionOpenGLSurface = qt_mac_resolveOption(YES, m_platformWindow->window(),
"_q_mac_wantsBestResolutionOpenGLSurface", "QT_MAC_WANTS_BEST_RESOLUTION_OPENGL_SURFACE");
// See also QCocoaGLContext::makeCurrent for software renderer workarounds.
}
}
- (BOOL)isOpaque
{
if (!m_platformWindow)
return true;
return m_platformWindow->isOpaque();
}
- (BOOL)isFlipped
{
return YES;
}
- (void)drawRect:(NSRect)dirtyRect
{
Q_UNUSED(dirtyRect);
if (!m_platformWindow)
return;
QRegion exposedRegion;
const NSRect *dirtyRects;
NSInteger numDirtyRects;
[self getRectsBeingDrawn:&dirtyRects count:&numDirtyRects];
for (int i = 0; i < numDirtyRects; ++i)
exposedRegion += QRectF::fromCGRect(dirtyRects[i]).toRect();
qCDebug(lcQpaDrawing) << "[QNSView drawRect:]" << m_platformWindow->window() << exposedRegion;
m_platformWindow->handleExposeEvent(exposedRegion);
}
- (BOOL)layerEnabledByMacOS
{
// AppKit has its own logic for this, but if we rely on that, our layers are created
// by AppKit at a point where we've already set up other parts of the platform plugin
// based on the presence of layers or not. Once we've rewritten these parts to support
// dynamically picking up layer enablement we can let AppKit do its thing.
return QMacVersion::buildSDK() >= QOperatingSystemVersion::MacOSMojave
&& QMacVersion::currentRuntime() >= QOperatingSystemVersion::MacOSMojave;
}
- (BOOL)layerExplicitlyRequested
{
static bool wantsLayer = [&]() {
int wantsLayer = qt_mac_resolveOption(-1, m_platformWindow->window(),
"_q_mac_wantsLayer", "QT_MAC_WANTS_LAYER");
if (wantsLayer != -1 && [self layerEnabledByMacOS]) {
qCWarning(lcQpaDrawing) << "Layer-backing cannot be explicitly controlled on 10.14 when built against the 10.14 SDK";
return true;
}
return wantsLayer == 1;
}();
return wantsLayer;
}
- (BOOL)shouldUseMetalLayer
{
// MetalSurface needs a layer, and so does VulkanSurface (via MoltenVK)
QSurface::SurfaceType surfaceType = m_platformWindow->window()->surfaceType();
return surfaceType == QWindow::MetalSurface || surfaceType == QWindow::VulkanSurface;
}
- (CALayer *)makeBackingLayer
{
if ([self shouldUseMetalLayer]) {
// Check if Metal is supported. If it isn't then it's most likely
// too late at this point and the QWindow will be non-functional,
// but we can at least print a warning.
if (![MTLCreateSystemDefaultDevice() autorelease]) {
qWarning() << "QWindow initialization error: Metal is not supported";
return [super makeBackingLayer];
}
CAMetalLayer *layer = [CAMetalLayer layer];
// Set the contentsScale for the layer. This is normally done in
// viewDidChangeBackingProperties, however on startup that function
// is called before the layer is created here. The layer's drawableSize
// is updated from layoutSublayersOfLayer as usual.
layer.contentsScale = self.window.backingScaleFactor;
return layer;
}
return [super makeBackingLayer];
}
- (void)setLayer:(CALayer *)layer
{
qCDebug(lcQpaDrawing) << "Making" << self << "layer-backed with" << layer
<< "due to being" << ([self layerExplicitlyRequested] ? "explicitly requested"
: [self shouldUseMetalLayer] ? "needed by surface type" : "enabled by macOS");
[super setLayer:layer];
}
- (NSViewLayerContentsRedrawPolicy)layerContentsRedrawPolicy
{
// We need to set this explicitly since the super implementation
// returns LayerContentsRedrawNever for custom layers like CAMetalLayer.
return NSViewLayerContentsRedrawDuringViewResize;
}
#if 0 // Disabled until we enable lazy backingstore resizing
- (NSViewLayerContentsPlacement)layerContentsPlacement
{
// Always place the layer at top left without any automatic scaling,
// so that we can re-use larger layers when resizing a window down.
return NSViewLayerContentsPlacementTopLeft;
}
#endif
- (void)updateMetalLayerDrawableSize:(CAMetalLayer *)layer
{
CGSize drawableSize = layer.bounds.size;
drawableSize.width *= layer.contentsScale;
drawableSize.height *= layer.contentsScale;
layer.drawableSize = drawableSize;
}
- (void)layoutSublayersOfLayer:(CALayer *)layer
{
if ([layer isKindOfClass:CAMetalLayer.class])
[self updateMetalLayerDrawableSize:static_cast<CAMetalLayer* >(layer)];
}
- (void)displayLayer:(CALayer *)layer
{
Q_ASSERT(layer == self.layer);
if (!m_platformWindow)
return;
qCDebug(lcQpaDrawing) << "[QNSView displayLayer]" << m_platformWindow->window();
// FIXME: Find out if there's a way to resolve the dirty rect like in drawRect:
m_platformWindow->handleExposeEvent(QRectF::fromCGRect(self.bounds).toRect());
}
- (void)viewDidChangeBackingProperties
{
CALayer *layer = self.layer;
if (!layer)
return;
layer.contentsScale = self.window.backingScaleFactor;
// Metal layers must be manually updated on e.g. screen change
if ([layer isKindOfClass:CAMetalLayer.class]) {
[self updateMetalLayerDrawableSize:static_cast<CAMetalLayer* >(layer)];
[self setNeedsDisplay:YES];
}
}
@end
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