diff options
Diffstat (limited to 'examples/quick/scenegraph/rendernode')
17 files changed, 888 insertions, 79 deletions
diff --git a/examples/quick/scenegraph/rendernode/customrenderitem.cpp b/examples/quick/scenegraph/rendernode/customrenderitem.cpp index 8f248e2ecb..e55cf0a2f4 100644 --- a/examples/quick/scenegraph/rendernode/customrenderitem.cpp +++ b/examples/quick/scenegraph/rendernode/customrenderitem.cpp @@ -53,42 +53,78 @@ #include <QSGRendererInterface> #include "openglrenderer.h" +#include "metalrenderer.h" #include "d3d12renderer.h" #include "softwarerenderer.h" +//! [1] CustomRenderItem::CustomRenderItem(QQuickItem *parent) : QQuickItem(parent) { // Our item shows something so set the flag. setFlag(ItemHasContents); } +//! [1] +//! [2] QSGNode *CustomRenderItem::updatePaintNode(QSGNode *node, UpdatePaintNodeData *) { QSGRenderNode *n = static_cast<QSGRenderNode *>(node); - if (!n) { - QSGRendererInterface *ri = window()->rendererInterface(); - if (!ri) - return nullptr; - switch (ri->graphicsApi()) { - case QSGRendererInterface::OpenGL: + + QSGRendererInterface *ri = window()->rendererInterface(); + if (!ri) + return nullptr; + + switch (ri->graphicsApi()) { + case QSGRendererInterface::OpenGL: + Q_FALLTHROUGH(); + case QSGRendererInterface::OpenGLRhi: #if QT_CONFIG(opengl) - n = new OpenGLRenderNode(this); - break; + if (!n) + n = new OpenGLRenderNode; + static_cast<OpenGLRenderNode *>(n)->sync(this); +#endif + break; + + case QSGRendererInterface::MetalRhi: +// Restore when QTBUG-78580 is done and the .pro is updated accordingly +//#ifdef Q_OS_DARWIN +#ifdef Q_OS_MACOS + if (!n) { + MetalRenderNode *metalNode = new MetalRenderNode; + n = metalNode; + metalNode->resourceBuilder()->setWindow(window()); + QObject::connect(window(), &QQuickWindow::beforeRendering, + metalNode->resourceBuilder(), &MetalRenderNodeResourceBuilder::build); + } + static_cast<MetalRenderNode *>(n)->sync(this); #endif - case QSGRendererInterface::Direct3D12: + break; + + case QSGRendererInterface::Direct3D12: // ### Qt 6: remove #if QT_CONFIG(d3d12) - n = new D3D12RenderNode(this); - break; + if (!n) + n = new D3D12RenderNode; + static_cast<D3D12RenderNode *>(n)->sync(this); #endif - case QSGRendererInterface::Software: - n = new SoftwareRenderNode(this); - break; + break; - default: - return nullptr; - } + case QSGRendererInterface::Software: + if (!n) + n = new SoftwareRenderNode; + static_cast<SoftwareRenderNode *>(n)->sync(this); + break; + + default: + break; } + if (!n) + qWarning("QSGRendererInterface reports unknown graphics API %d", ri->graphicsApi()); + return n; } +//! [2] + +// This item does not support being moved between windows. If that is desired, +// itemChange() should be reimplemented as well. diff --git a/examples/quick/scenegraph/rendernode/d3d12renderer.cpp b/examples/quick/scenegraph/rendernode/d3d12renderer.cpp index df0e29eb67..e85811c089 100644 --- a/examples/quick/scenegraph/rendernode/d3d12renderer.cpp +++ b/examples/quick/scenegraph/rendernode/d3d12renderer.cpp @@ -54,12 +54,9 @@ #include <QSGRendererInterface> #include <QFile> -#if QT_CONFIG(d3d12) +// ### Qt 6: remove -D3D12RenderNode::D3D12RenderNode(QQuickItem *item) - : m_item(item) -{ -} +#if QT_CONFIG(d3d12) D3D12RenderNode::~D3D12RenderNode() { @@ -85,8 +82,8 @@ void D3D12RenderNode::releaseResources() void D3D12RenderNode::init() { - QSGRendererInterface *rif = m_item->window()->rendererInterface(); - m_device = static_cast<ID3D12Device *>(rif->getResource(m_item->window(), QSGRendererInterface::DeviceResource)); + QSGRendererInterface *rif = m_window->rendererInterface(); + m_device = static_cast<ID3D12Device *>(rif->getResource(m_window, QSGRendererInterface::DeviceResource)); Q_ASSERT(m_device); D3D12_ROOT_PARAMETER rootParameter; @@ -166,8 +163,8 @@ void D3D12RenderNode::init() psoDesc.RasterizerState = rastDesc; psoDesc.BlendState = blendDesc; // No depth. The correct stacking of the item is ensured by the projection matrix. - // Do not bother with stencil since we do not apply clipping in the - // example. If clipping is desired, render() needs to set a different PSO + // Note that this does not support clipping. + // If clipping is desired, render() needs to set a different PSO // with stencil enabled whenever the RenderState indicates so. psoDesc.SampleMask = UINT_MAX; psoDesc.PrimitiveTopologyType = D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE; @@ -176,7 +173,7 @@ void D3D12RenderNode::init() psoDesc.DSVFormat = DXGI_FORMAT_D24_UNORM_S8_UINT; // not in use due to !DepthEnable, but this would be the correct format otherwise // We are rendering on the default render target so if the QuickWindow/View // has requested samples > 0 then we have to follow suit. - const uint samples = qMax(1, m_item->window()->format().samples()); + const uint samples = qMax(1, m_window->format().samples()); psoDesc.SampleDesc.Count = samples; if (samples > 1) { D3D12_FEATURE_DATA_MULTISAMPLE_QUALITY_LEVELS msaaInfo = {}; @@ -255,9 +252,9 @@ void D3D12RenderNode::render(const RenderState *state) if (!m_device) init(); - QSGRendererInterface *rif = m_item->window()->rendererInterface(); + QSGRendererInterface *rif = m_window->rendererInterface(); ID3D12GraphicsCommandList *commandList = static_cast<ID3D12GraphicsCommandList *>( - rif->getResource(m_item->window(), QSGRendererInterface::CommandListResource)); + rif->getResource(m_window, QSGRendererInterface::CommandListResource)); Q_ASSERT(commandList); const int msize = 16 * sizeof(float); @@ -266,9 +263,9 @@ void D3D12RenderNode::render(const RenderState *state) const float opacity = inheritedOpacity(); memcpy(cbPtr + 2 * msize, &opacity, sizeof(float)); - const QPointF p0(m_item->width() - 1, m_item->height() - 1); + const QPointF p0(m_width - 1, m_height - 1); const QPointF p1(0, 0); - const QPointF p2(0, m_item->height() - 1); + const QPointF p2(0, m_height - 1); float *vp = reinterpret_cast<float *>(vbPtr); *vp++ = p0.x(); @@ -299,7 +296,14 @@ QSGRenderNode::RenderingFlags D3D12RenderNode::flags() const QRectF D3D12RenderNode::rect() const { - return QRect(0, 0, m_item->width(), m_item->height()); + return QRect(0, 0, m_width, m_height); +} + +void D3D12RenderNode::sync(QQuickItem *item) +{ + m_window = item->window(); + m_width = item->width(); + m_height = item->height(); } #endif // d3d12 diff --git a/examples/quick/scenegraph/rendernode/d3d12renderer.h b/examples/quick/scenegraph/rendernode/d3d12renderer.h index ec4b5f85e8..7186b72c04 100644 --- a/examples/quick/scenegraph/rendernode/d3d12renderer.h +++ b/examples/quick/scenegraph/rendernode/d3d12renderer.h @@ -52,11 +52,10 @@ #define D3D12RENDERER_H #include <qsgrendernode.h> +#include <QQuickItem> #if QT_CONFIG(d3d12) -QT_FORWARD_DECLARE_CLASS(QQuickItem) - #include <d3d12.h> #include <wrl/client.h> @@ -65,7 +64,6 @@ using namespace Microsoft::WRL; class D3D12RenderNode : public QSGRenderNode { public: - D3D12RenderNode(QQuickItem *item); ~D3D12RenderNode(); void render(const RenderState *state) override; @@ -73,10 +71,15 @@ public: RenderingFlags flags() const override; QRectF rect() const override; + void sync(QQuickItem *item); + private: void init(); - QQuickItem *m_item; + QQuickWindow *m_window = nullptr; + int m_width = 0; + int m_height = 0; + ID3D12Device *m_device = nullptr; ComPtr<ID3D12PipelineState> pipelineState; ComPtr<ID3D12RootSignature> rootSignature; diff --git a/examples/quick/scenegraph/rendernode/doc/images/rendernode-example.jpg b/examples/quick/scenegraph/rendernode/doc/images/rendernode-example.jpg Binary files differnew file mode 100644 index 0000000000..cbb59b950d --- /dev/null +++ b/examples/quick/scenegraph/rendernode/doc/images/rendernode-example.jpg diff --git a/examples/quick/scenegraph/rendernode/doc/src/rendernode.qdoc b/examples/quick/scenegraph/rendernode/doc/src/rendernode.qdoc new file mode 100644 index 0000000000..ba6551fddf --- /dev/null +++ b/examples/quick/scenegraph/rendernode/doc/src/rendernode.qdoc @@ -0,0 +1,165 @@ +/**************************************************************************** +** +** Copyright (C) 2019 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:FDL$ +** 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 Free Documentation License Usage +** Alternatively, this file may be used under the terms of the GNU Free +** Documentation License version 1.3 as published by the Free Software +** Foundation and appearing in the file included in the packaging of +** this file. Please review the following information to ensure +** the GNU Free Documentation License version 1.3 requirements +** will be met: https://www.gnu.org/licenses/fdl-1.3.html. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + \example scenegraph/rendernode + \title Scene Graph - Custom Rendering with QSGRenderNode + \ingroup qtquickexamples + \brief Shows how to integrate drawing via the native graphics API with the Qt Quick scene graph. + + \image rendernode-example.jpg + + \l QSGRenderNode allows integrating draw and other calls made directly via + the Qt Quick scene graph's underlying native graphics API (such as, Vulkan, + Metal, Direct 3D, or OpenGL). This example demonstrates implementing a + custom QQuickItem backed by a QSGRenderNode implementation, where the node + renders a triangle directly via the graphics API. The rest of the scene + (background, text, rectangles) are standard Qt Quick items. The example has + full support for OpenGL and Metal, as well as the software backend of Qt + Quick. + + The custom item behaves like any other Qt Quick item, meaning it + participates and stacking and clipping as usual, which is a big difference + to the alternative approaches like having the custom rendering as an + overlay (connecting to \l QQuickWindow::afterRendering()) and underlay + (connecting to \l QQuickWindow::beforeRendering()) because those do not + offer the possibility of proper mixing of the custom content with the Qt + Quick scene. + + Another important feature is that QSGRenderNode can be helpful to preserve + performance, when compared to some of the alternatives. Going through \l + QQuickFramebufferObject allows creating a custom item similarly to what + this example does, but it does it by rendering the custom content in a + texture, and then drawing a textured quad with that texture. This can be + expensive on some systems due to the cost of texturing and blending. + QSGRenderNode avoids this since the native graphics calls are issued in + line with the draw calls for the scene graph's batches. + + All this comes at the cost of being more complex, and not necessarily being + suitable for all types of 3D content, in particular where vertices and + different depth would clash with the 2D content in the Qt Quick scene + graph's batches (those are better served by "flattening" into a 2D texture + via approaches like QQuickFramebufferObject). Therefore QSGRenderNode is + not always the right choice. It can however a good and powerful choice in + many cases. This is what the example demonstrates. + + Let's go through the most important parts of the code: + + \snippet scenegraph/rendernode/main.cpp 1 + + Our custom QML type is implemented in the class CustomRenderItem. + + \snippet scenegraph/rendernode/main.qml 2 + + The corresponding import in the QML document. + + \snippet scenegraph/rendernode/main.qml 3 + + The CustomRenderItem object. It is positioned to fill a big part of the + scene, covering its parent (the yellow rectangle; this will be used to + demonstrate clipping). The item will have its scale and rotation animated. + + \snippet scenegraph/rendernode/main.qml 4 + + Text items are used to show some helpful information, such as, the + active graphics API Qt Quick uses. + + \snippet scenegraph/rendernode/main.qml 5 + + Clicking the left mouse button is used to toggle clipping on the custom + item's parent item. By default this is done using scissoring (GL_SCISSOR_TEST + with OpenGL). A well-written QSGRenderNode implementation is expected to be + able to take this into account and enable scissor testing when the scene graph + indicates that it is necessary. + + The right mouse button is used to toggle an animation on the rotation of + the parent item. With clipping enabled, this demonstrates clipping via the + stencil buffer since a rectangular scissor is not appropriate when we need + to clip to a rotated rectangle shape. The scene graph fills up the stencil + buffer as necessary, the QSGRenderNode implementation just has to enable + stencil testing using the provided reference value. + + \snippet scenegraph/rendernode/customrenderitem.cpp 1 + + Moving on to the CustomRenderItem implementation. This is a visual item. + + \snippet scenegraph/rendernode/customrenderitem.cpp 2 + + The implementation of \l QQuickItem::updatePaintNode() creates (if not yet + done) and returns an instance of a suitable QSGRenderNode subclass. The + example supports multiple graphics APIs, and also the \c software backend. + + Let's look at the the render node for OpenGL (supporting both the + traditional, direct OpenGL-based scene graph, and also the modern, + abstracted variant using the RHI). For other graphics APIs, the concepts + and the outline of a QSGRenderNode implementation are the same. It is worth + noting that in some cases it will also be necessary to connect to a signal + like \l QQuickWindow::beforeRendering() to perform copy type of operations + (such as, vertex buffer uploads). This is not necessary for OpenGL, but it + is essential for Vulkan or Metal since there such operations cannot be + issued in render() as there is a renderpass being recorded when render() is + called. + + \snippet scenegraph/rendernode/openglrenderer.h 1 + + The main job is to provide implementations of the virtual QSGRenderNode functions. + + \snippet scenegraph/rendernode/openglrenderer.cpp 1 + + The pattern for safe graphics resource management is to do any cleanup in + \l{QSGRenderNode::releaseResources()}{releaseResources()}, while also + calling this from the destructor. + + \snippet scenegraph/rendernode/openglrenderer.cpp 2 + + The render() function initializes graphics resources (in this case, an + OpenGL shader program and a vertex buffer), if not yet done. It then + makes sure the necessary resources are bound and updates uniforms. + The transformation matrix and the opacity are provided by the scene graph + either via the \c state argument or base class functions. + + \snippet scenegraph/rendernode/openglrenderer.cpp 5 + + This render node is well-behaving since it basically renders in 2D, + respecting the item's geometry. This is not mandatory, but then flags() has + to return (or not return) the appropriate flags. + + \snippet scenegraph/rendernode/openglrenderer.cpp 3 + + After setting up vertex inputs, but before recording a draw call for our + triangle, it is important to set some state in order to integrate with the + rest of the scene correctly. Setting scissor and stencil as instructed by + \c state allows our item to render correctly even when there are one or + more clips in the parent chain. + + \snippet scenegraph/rendernode/openglrenderer.cpp 4 + + As shown above, we only really render in 2D (no depth), within the item's + geometry. changedStates() returns the flags corresponding to the OpenGL + states render() touches. + +*/ diff --git a/examples/quick/scenegraph/rendernode/main.cpp b/examples/quick/scenegraph/rendernode/main.cpp index 21419abfc9..146d787e50 100644 --- a/examples/quick/scenegraph/rendernode/main.cpp +++ b/examples/quick/scenegraph/rendernode/main.cpp @@ -58,7 +58,9 @@ int main(int argc, char **argv) { QGuiApplication app(argc, argv); +//! [1] qmlRegisterType<CustomRenderItem>("SceneGraphRendering", 2, 0, "CustomRenderItem"); +//! [1] QQuickView view; diff --git a/examples/quick/scenegraph/rendernode/main.qml b/examples/quick/scenegraph/rendernode/main.qml index d0ba4a4669..153a71e097 100644 --- a/examples/quick/scenegraph/rendernode/main.qml +++ b/examples/quick/scenegraph/rendernode/main.qml @@ -49,27 +49,65 @@ ****************************************************************************/ import QtQuick 2.8 +//! [2] import SceneGraphRendering 2.0 +//! [2] Item { Rectangle { + id: bg anchors.fill: parent gradient: Gradient { GradientStop { position: 0; color: "steelblue" } GradientStop { position: 1; color: "black" } } - CustomRenderItem { - id: renderer + //! [5] + MouseArea { anchors.fill: parent - anchors.margins: 10 + acceptedButtons: Qt.LeftButton | Qt.RightButton + onClicked: { + if (mouse.button === Qt.LeftButton) { + clipper.clip = !clipper.clip + } else if (mouse.button === Qt.RightButton) { + nonRectClipAnim.running = !nonRectClipAnim.running + if (!nonRectClipAnim.running) + clipper.rotation = 0; + } + } + } + // ![5] + + Rectangle { + id: clipper + width: parent.width / 2 + height: parent.height / 2 + anchors.centerIn: parent + border.color: "yellow" + border.width: 2 + color: "transparent" + NumberAnimation on rotation { + id: nonRectClipAnim + from: 0; to: 360; duration: 5000; loops: Animation.Infinite + running: false + } + + //! [3] + CustomRenderItem { + id: renderer + width: bg.width - 20 + height: bg.height - 20 + x: -clipper.x + 10 + y: -clipper.y + 10 - transform: [ - Rotation { id: rotation; axis.x: 0; axis.z: 0; axis.y: 1; angle: 0; origin.x: renderer.width / 2; origin.y: renderer.height / 2; }, - Translate { id: txOut; x: -renderer.width / 2; y: -renderer.height / 2 }, - Scale { id: scale; }, - Translate { id: txIn; x: renderer.width / 2; y: renderer.height / 2 } - ] + transform: [ + Rotation { id: rotation; axis.x: 0; axis.z: 0; axis.y: 1; angle: 0; origin.x: renderer.width / 2; origin.y: renderer.height / 2; }, + Translate { id: txOut; x: -renderer.width / 2; y: -renderer.height / 2 }, + Scale { id: scale; }, + Translate { id: txIn; x: renderer.width / 2; y: renderer.height / 2 } + ] + } + //! [3] } SequentialAnimation { @@ -92,19 +130,39 @@ Item { loops: Animation.Infinite } + //! [4] Text { id: label - anchors.bottom: renderer.bottom - anchors.left: renderer.left - anchors.right: renderer.right + anchors.bottom: parent.bottom + anchors.left: parent.left anchors.margins: 20 + color: "yellow" wrapMode: Text.WordWrap property int api: GraphicsInfo.api - text: "Custom rendering via the graphics API " - + (api === GraphicsInfo.OpenGL ? "OpenGL" - : api === GraphicsInfo.Direct3D12 ? "Direct3D 12" - : api === GraphicsInfo.Software ? "Software" : "") + text: { + var apiStr; + switch (api) { + case GraphicsInfo.OpenGL: apiStr = "OpenGL (direct)"; break; + case GraphicsInfo.Direct3D12: apiStr = "Direct3D 12 (direct)"; break; + case GraphicsInfo.Software: apiStr = "Software (QPainter)"; break; + case GraphicsInfo.OpenGLRhi: apiStr = "OpenGL (RHI)"; break; + case GraphicsInfo.MetalRhi: apiStr = "Metal (RHI)"; break; + // the example has no other QSGRenderNode subclasses + default: apiStr = "<UNSUPPORTED>"; break; + } + "Custom rendering via the graphics API " + apiStr + + "\nLeft click to toggle clipping to yellow rect" + + "\nRight click to rotate (can be used to exercise stencil clip instead of scissor)" + } + // ![4] + } + + Text { + id: label2 + anchors.top: parent.top + anchors.right: parent.right color: "yellow" + text: "Clip: " + (clipper.clip ? "ON" : "OFF") + " Rotation: " + (nonRectClipAnim.running ? "ON" : "OFF") } } } diff --git a/examples/quick/scenegraph/rendernode/metalrenderer.h b/examples/quick/scenegraph/rendernode/metalrenderer.h new file mode 100644 index 0000000000..cf7fccb930 --- /dev/null +++ b/examples/quick/scenegraph/rendernode/metalrenderer.h @@ -0,0 +1,104 @@ +/**************************************************************************** +** +** Copyright (C) 2019 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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. +** +** BSD License Usage +** Alternatively, you may use this file under the terms of the BSD license +** as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef METALRENDERER_H +#define METALRENDERER_H + +#include <qsgrendernode.h> +#include <QQuickItem> + +//#ifdef Q_OS_DARWIN +#ifdef Q_OS_MACOS + +QT_BEGIN_NAMESPACE + +QT_END_NAMESPACE + +class MetalRenderNodeResourceBuilder : public QObject +{ + Q_OBJECT + +public: + void setWindow(QQuickWindow *w) { m_window = w; } + +public slots: + void build(); + +private: + QQuickWindow *m_window = nullptr; +}; + +class MetalRenderNode : public QSGRenderNode +{ +public: + MetalRenderNode(); + ~MetalRenderNode(); + + void render(const RenderState *state) override; + void releaseResources() override; + StateFlags changedStates() const override; + RenderingFlags flags() const override; + QRectF rect() const override; + + MetalRenderNodeResourceBuilder *resourceBuilder() { return &m_resourceBuilder; } + + void sync(QQuickItem *item); + +private: + MetalRenderNodeResourceBuilder m_resourceBuilder; + QQuickWindow *m_window = nullptr; + int m_width = 0; + int m_height = 0; + int m_outputHeight = 0; +}; + +#endif // Q_OS_DARWIN + +#endif diff --git a/examples/quick/scenegraph/rendernode/metalrenderer.mm b/examples/quick/scenegraph/rendernode/metalrenderer.mm new file mode 100644 index 0000000000..b83dc62c48 --- /dev/null +++ b/examples/quick/scenegraph/rendernode/metalrenderer.mm @@ -0,0 +1,333 @@ +/**************************************************************************** +** +** Copyright (C) 2019 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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. +** +** BSD License Usage +** Alternatively, you may use this file under the terms of the BSD license +** as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "metalrenderer.h" +#include <QQuickItem> +#include <QQuickWindow> + +#include <Metal/Metal.h> + +using FuncAndLib = QPair<id<MTLFunction>, id<MTLLibrary> >; + +const int MAX_FRAMES_IN_FLIGHT = 3; + +struct { + id<MTLDevice> dev = nil; + QByteArray vsSource; + FuncAndLib vs; + QByteArray fsSource; + FuncAndLib fs; + id<MTLBuffer> vbuf[MAX_FRAMES_IN_FLIGHT]; + id<MTLBuffer> ubuf[MAX_FRAMES_IN_FLIGHT]; + id<MTLDepthStencilState> stencilEnabledDsState = nil; + id<MTLRenderPipelineState> pipeline = nil; +} g; + +static FuncAndLib compileShaderFromSource(const QByteArray &src, const QByteArray &entryPoint) +{ + FuncAndLib fl; + + NSString *srcstr = [NSString stringWithUTF8String: src.constData()]; + MTLCompileOptions *opts = [[MTLCompileOptions alloc] init]; + opts.languageVersion = MTLLanguageVersion1_2; + NSError *err = nil; + fl.second = [g.dev newLibraryWithSource: srcstr options: opts error: &err]; + [opts release]; + // srcstr is autoreleased + + if (err) { + const QString msg = QString::fromNSString(err.localizedDescription); + qFatal("%s", qPrintable(msg)); + return fl; + } + + NSString *name = [NSString stringWithUTF8String: entryPoint.constData()]; + fl.first = [fl.second newFunctionWithName: name]; + [name release]; + + return fl; +} + +const int VERTEX_SIZE = 6 * sizeof(float); + +static float colors[] = { + 1.0f, 0.0f, 0.0f, + 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 1.0f +}; + +void MetalRenderNodeResourceBuilder::build() +{ + if (!g.dev) { + QSGRendererInterface *rif = m_window->rendererInterface(); + Q_ASSERT(rif->graphicsApi() == QSGRendererInterface::MetalRhi); + + g.dev = (id<MTLDevice>) rif->getResource(m_window, QSGRendererInterface::DeviceResource); + Q_ASSERT(g.dev); + } + + if (g.vsSource.isEmpty()) { + const QString filename = QLatin1String(":/scenegraph/rendernode/metalshader.vert"); + QFile f(filename); + if (!f.open(QIODevice::ReadOnly | QIODevice::Text)) + qFatal("Failed to read shader %s", qPrintable(filename)); + g.vsSource = f.readAll(); + g.vs = compileShaderFromSource(g.vsSource, QByteArrayLiteral("main0")); + } + + if (g.fsSource.isEmpty()) { + const QString filename = QLatin1String(":/scenegraph/rendernode/metalshader.frag"); + QFile f(filename); + if (!f.open(QIODevice::ReadOnly | QIODevice::Text)) + qFatal("Failed to read shader %s", qPrintable(filename)); + g.fsSource = f.readAll(); + g.fs = compileShaderFromSource(g.fsSource, QByteArrayLiteral("main0")); + } + + const int framesInFlight = m_window->graphicsStateInfo().framesInFlight; + + // For simplicity's sake we use shared mode (something like host visible + + // host coherent) for everything. + + for (int i = 0; i < framesInFlight; ++i) { + // Have multiple versions for vertex too since we'll just memcpy new + // vertices based on item width and height on every render(). This could + // be optimized further however. + if (!g.vbuf[i]) { + g.vbuf[i] = [g.dev newBufferWithLength: VERTEX_SIZE + sizeof(colors) options: MTLResourceStorageModeShared]; + char *p = (char *) [g.vbuf[i] contents]; + memcpy(p + VERTEX_SIZE, colors, sizeof(colors)); + } + + if (!g.ubuf[i]) + g.ubuf[i] = [g.dev newBufferWithLength: 256 options: MTLResourceStorageModeShared]; + } + + if (!g.stencilEnabledDsState) { + MTLDepthStencilDescriptor *dsDesc = [[MTLDepthStencilDescriptor alloc] init]; + dsDesc.frontFaceStencil = [[MTLStencilDescriptor alloc] init]; + dsDesc.frontFaceStencil.stencilFailureOperation = MTLStencilOperationKeep; + dsDesc.frontFaceStencil.depthFailureOperation = MTLStencilOperationKeep; + dsDesc.frontFaceStencil.depthStencilPassOperation = MTLStencilOperationKeep; + dsDesc.frontFaceStencil.stencilCompareFunction = MTLCompareFunctionEqual; + dsDesc.frontFaceStencil.readMask = 0xFF; + dsDesc.frontFaceStencil.writeMask = 0xFF; + + dsDesc.backFaceStencil = [[MTLStencilDescriptor alloc] init]; + dsDesc.backFaceStencil.stencilFailureOperation = MTLStencilOperationKeep; + dsDesc.backFaceStencil.depthFailureOperation = MTLStencilOperationKeep; + dsDesc.backFaceStencil.depthStencilPassOperation = MTLStencilOperationKeep; + dsDesc.backFaceStencil.stencilCompareFunction = MTLCompareFunctionEqual; + dsDesc.backFaceStencil.readMask = 0xFF; + dsDesc.backFaceStencil.writeMask = 0xFF; + + g.stencilEnabledDsState = [g.dev newDepthStencilStateWithDescriptor: dsDesc]; + [dsDesc release]; + } + + if (!g.pipeline) { + MTLVertexDescriptor *inputLayout = [MTLVertexDescriptor vertexDescriptor]; + inputLayout.attributes[0].format = MTLVertexFormatFloat2; + inputLayout.attributes[0].offset = 0; + inputLayout.attributes[0].bufferIndex = 1; // ubuf is 0, vbuf is 1 and 2 + inputLayout.attributes[1].format = MTLVertexFormatFloat3; + inputLayout.attributes[1].offset = 0; + inputLayout.attributes[1].bufferIndex = 2; + inputLayout.layouts[1].stride = 2 * sizeof(float); + inputLayout.layouts[2].stride = 3 * sizeof(float); + + MTLRenderPipelineDescriptor *rpDesc = [[MTLRenderPipelineDescriptor alloc] init]; + rpDesc.vertexDescriptor = inputLayout; + + rpDesc.vertexFunction = g.vs.first; + rpDesc.fragmentFunction = g.fs.first; + + rpDesc.colorAttachments[0].pixelFormat = MTLPixelFormatBGRA8Unorm; + rpDesc.colorAttachments[0].blendingEnabled = true; + rpDesc.colorAttachments[0].sourceRGBBlendFactor = MTLBlendFactorOne; + rpDesc.colorAttachments[0].sourceAlphaBlendFactor = MTLBlendFactorOne; + rpDesc.colorAttachments[0].destinationRGBBlendFactor = MTLBlendFactorOneMinusSourceAlpha; + rpDesc.colorAttachments[0].destinationAlphaBlendFactor = MTLBlendFactorOneMinusSourceAlpha; + + if (g.dev.depth24Stencil8PixelFormatSupported) { + rpDesc.depthAttachmentPixelFormat = MTLPixelFormatDepth24Unorm_Stencil8; + rpDesc.stencilAttachmentPixelFormat = MTLPixelFormatDepth24Unorm_Stencil8; + } else { + rpDesc.depthAttachmentPixelFormat = MTLPixelFormatDepth32Float_Stencil8; + rpDesc.stencilAttachmentPixelFormat = MTLPixelFormatDepth32Float_Stencil8; + } + + NSError *err = nil; + g.pipeline = [g.dev newRenderPipelineStateWithDescriptor: rpDesc error: &err]; + if (!g.pipeline) { + const QString msg = QString::fromNSString(err.localizedDescription); + qFatal("Failed to create render pipeline state: %s", qPrintable(msg)); + } + [rpDesc release]; + } +} + +MetalRenderNode::MetalRenderNode() +{ + g.vs.first = g.fs.first = nil; + g.vs.second = g.fs.second = nil; + + for (int i = 0; i < MAX_FRAMES_IN_FLIGHT; ++i) { + g.vbuf[i] = nil; + g.ubuf[i] = nil; + } +} + +MetalRenderNode::~MetalRenderNode() +{ + releaseResources(); +} + +void MetalRenderNode::releaseResources() +{ + [g.stencilEnabledDsState release]; + g.stencilEnabledDsState = nil; + + [g.pipeline release]; + g.pipeline = nil; + + [g.vs.first release]; + [g.vs.second release]; + + [g.fs.first release]; + [g.fs.second release]; + + g.vs.first = g.fs.first = nil; + g.vs.second = g.fs.second = nil; + + for (int i = 0; i < MAX_FRAMES_IN_FLIGHT; ++i) { + [g.vbuf[i] release]; + g.vbuf[i] = nil; + [g.ubuf[i] release]; + g.ubuf[i] = nil; + } +} + +void MetalRenderNode::render(const RenderState *state) +{ + Q_ASSERT(m_window); + const QQuickWindow::GraphicsStateInfo &stateInfo(m_window->graphicsStateInfo()); + id<MTLBuffer> vbuf = g.vbuf[stateInfo.currentFrameSlot]; + id<MTLBuffer> ubuf = g.ubuf[stateInfo.currentFrameSlot]; + + QPointF p0(m_width - 1, m_height - 1); + QPointF p1(0, 0); + QPointF p2(0, m_height - 1); + + float vertices[6] = { float(p0.x()), float(p0.y()), + float(p1.x()), float(p1.y()), + float(p2.x()), float(p2.y()) }; + char *p = (char *) [vbuf contents]; + memcpy(p, vertices, VERTEX_SIZE); + + const QMatrix4x4 mvp = *state->projectionMatrix() * *matrix(); + const float opacity = inheritedOpacity(); + + p = (char *) [ubuf contents]; + memcpy(p, mvp.constData(), 64); + memcpy(p + 64, &opacity, 4); + + QSGRendererInterface *rif = m_window->rendererInterface(); + id<MTLRenderCommandEncoder> encoder = (id<MTLRenderCommandEncoder>) rif->getResource( + m_window, QSGRendererInterface::CommandEncoderResource); + Q_ASSERT(encoder); + + [encoder setVertexBuffer: vbuf offset: 0 atIndex: 1]; + [encoder setVertexBuffer: vbuf offset: VERTEX_SIZE atIndex: 2]; + + [encoder setVertexBuffer: ubuf offset: 0 atIndex: 0]; + [encoder setFragmentBuffer: ubuf offset: 0 atIndex: 0]; + + // Clip support. + if (state->scissorEnabled()) { + const QRect r = state->scissorRect(); // bottom-up + MTLScissorRect s; + s.x = r.x(); + s.y = m_outputHeight - (r.y() + r.height()); + s.width = r.width(); + s.height = r.height(); + [encoder setScissorRect: s]; + } + if (state->stencilEnabled()) { + [encoder setDepthStencilState: g.stencilEnabledDsState]; + [encoder setStencilReferenceValue: state->stencilValue()]; + } + + [encoder setRenderPipelineState: g.pipeline]; + [encoder drawPrimitives: MTLPrimitiveTypeTriangle vertexStart: 0 vertexCount: 3 instanceCount: 1 baseInstance: 0]; +} + +QSGRenderNode::StateFlags MetalRenderNode::changedStates() const +{ + return BlendState | ScissorState | StencilState; +} + +QSGRenderNode::RenderingFlags MetalRenderNode::flags() const +{ + return BoundedRectRendering | DepthAwareRendering; +} + +QRectF MetalRenderNode::rect() const +{ + return QRect(0, 0, m_width, m_height); +} + +void MetalRenderNode::sync(QQuickItem *item) +{ + m_window = item->window(); + m_width = item->width(); + m_height = item->height(); + m_outputHeight = m_window->height() * m_window->effectiveDevicePixelRatio(); +} diff --git a/examples/quick/scenegraph/rendernode/metalshader.frag b/examples/quick/scenegraph/rendernode/metalshader.frag new file mode 100644 index 0000000000..907faa537f --- /dev/null +++ b/examples/quick/scenegraph/rendernode/metalshader.frag @@ -0,0 +1,28 @@ +#include <metal_stdlib> +#include <simd/simd.h> + +using namespace metal; + +struct buf +{ + float4x4 matrix; + float opacity; +}; + +struct main0_out +{ + float4 fragColor [[color(0)]]; +}; + +struct main0_in +{ + float4 v_color [[user(locn0)]]; +}; + +fragment main0_out main0(main0_in in [[stage_in]], constant buf& ubuf [[buffer(0)]]) +{ + main0_out out = {}; + out.fragColor = in.v_color * ubuf.opacity; + return out; +} + diff --git a/examples/quick/scenegraph/rendernode/metalshader.vert b/examples/quick/scenegraph/rendernode/metalshader.vert new file mode 100644 index 0000000000..12b721f524 --- /dev/null +++ b/examples/quick/scenegraph/rendernode/metalshader.vert @@ -0,0 +1,31 @@ +#include <metal_stdlib> +#include <simd/simd.h> + +using namespace metal; + +struct buf +{ + float4x4 matrix; + float opacity; +}; + +struct main0_out +{ + float4 v_color [[user(locn0)]]; + float4 gl_Position [[position]]; +}; + +struct main0_in +{ + float4 pos [[attribute(0)]]; + float4 color [[attribute(1)]]; +}; + +vertex main0_out main0(main0_in in [[stage_in]], constant buf& ubuf [[buffer(0)]]) +{ + main0_out out = {}; + out.v_color = in.color; + out.gl_Position = ubuf.matrix * in.pos; + return out; +} + diff --git a/examples/quick/scenegraph/rendernode/openglrenderer.cpp b/examples/quick/scenegraph/rendernode/openglrenderer.cpp index 3c68830db6..a4e619bea9 100644 --- a/examples/quick/scenegraph/rendernode/openglrenderer.cpp +++ b/examples/quick/scenegraph/rendernode/openglrenderer.cpp @@ -57,11 +57,7 @@ #include <QOpenGLBuffer> #include <QOpenGLFunctions> -OpenGLRenderNode::OpenGLRenderNode(QQuickItem *item) - : m_item(item) -{ -} - +//! [1] OpenGLRenderNode::~OpenGLRenderNode() { releaseResources(); @@ -74,6 +70,7 @@ void OpenGLRenderNode::releaseResources() delete m_vbo; m_vbo = nullptr; } +//! [1] void OpenGLRenderNode::init() { @@ -121,44 +118,66 @@ void OpenGLRenderNode::init() m_vbo->release(); } +//! [2] void OpenGLRenderNode::render(const RenderState *state) { if (!m_program) init(); QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions(); - m_program->bind(); m_program->setUniformValue(m_matrixUniform, *state->projectionMatrix() * *matrix()); m_program->setUniformValue(m_opacityUniform, float(inheritedOpacity())); +//! [2] m_vbo->bind(); - QPointF p0(m_item->width() - 1, m_item->height() - 1); +//! [5] + QPointF p0(m_width - 1, m_height - 1); QPointF p1(0, 0); - QPointF p2(0, m_item->height() - 1); + QPointF p2(0, m_height - 1); GLfloat vertices[6] = { GLfloat(p0.x()), GLfloat(p0.y()), GLfloat(p1.x()), GLfloat(p1.y()), GLfloat(p2.x()), GLfloat(p2.y()) }; m_vbo->write(0, vertices, sizeof(vertices)); +//! [5] m_program->setAttributeBuffer(0, GL_FLOAT, 0, 2); m_program->setAttributeBuffer(1, GL_FLOAT, sizeof(vertices), 3); m_program->enableAttributeArray(0); m_program->enableAttributeArray(1); - // Note that clipping (scissor or stencil) is ignored in this example. + // We are prepared both for the legacy (direct OpenGL) and the modern + // (abstracted by RHI) OpenGL scenegraph. So set all the states that are + // important to us. + + //! [3] + f->glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); f->glEnable(GL_BLEND); f->glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); + // Clip support. + if (state->scissorEnabled()) { + f->glEnable(GL_SCISSOR_TEST); + const QRect r = state->scissorRect(); // already bottom-up + f->glScissor(r.x(), r.y(), r.width(), r.height()); + } + if (state->stencilEnabled()) { + f->glEnable(GL_STENCIL_TEST); + f->glStencilFunc(GL_EQUAL, state->stencilValue(), 0xFF); + f->glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); + } + f->glDrawArrays(GL_TRIANGLES, 0, 3); + //! [3] } +//! [4] QSGRenderNode::StateFlags OpenGLRenderNode::changedStates() const { - return BlendState; + return BlendState | ScissorState | StencilState; } QSGRenderNode::RenderingFlags OpenGLRenderNode::flags() const @@ -168,7 +187,14 @@ QSGRenderNode::RenderingFlags OpenGLRenderNode::flags() const QRectF OpenGLRenderNode::rect() const { - return QRect(0, 0, m_item->width(), m_item->height()); + return QRect(0, 0, m_width, m_height); +} +//! [4] + +void OpenGLRenderNode::sync(QQuickItem *item) +{ + m_width = item->width(); + m_height = item->height(); } #endif // opengl diff --git a/examples/quick/scenegraph/rendernode/openglrenderer.h b/examples/quick/scenegraph/rendernode/openglrenderer.h index ac640405c5..1e7977481a 100644 --- a/examples/quick/scenegraph/rendernode/openglrenderer.h +++ b/examples/quick/scenegraph/rendernode/openglrenderer.h @@ -52,21 +52,21 @@ #define OPENGLRENDERER_H #include <qsgrendernode.h> +#include <QQuickItem> #if QT_CONFIG(opengl) QT_BEGIN_NAMESPACE -class QQuickItem; class QOpenGLShaderProgram; class QOpenGLBuffer; QT_END_NAMESPACE +//! [1] class OpenGLRenderNode : public QSGRenderNode { public: - OpenGLRenderNode(QQuickItem *item); ~OpenGLRenderNode(); void render(const RenderState *state) override; @@ -74,11 +74,15 @@ public: StateFlags changedStates() const override; RenderingFlags flags() const override; QRectF rect() const override; +//! [1] + + void sync(QQuickItem *item); private: void init(); - QQuickItem *m_item; + int m_width = 0; + int m_height = 0; QOpenGLShaderProgram *m_program = nullptr; int m_matrixUniform; int m_opacityUniform; diff --git a/examples/quick/scenegraph/rendernode/rendernode.pro b/examples/quick/scenegraph/rendernode/rendernode.pro index 76e498042b..897b0b1f08 100644 --- a/examples/quick/scenegraph/rendernode/rendernode.pro +++ b/examples/quick/scenegraph/rendernode/rendernode.pro @@ -22,3 +22,9 @@ qtConfig(d3d12) { SOURCES += d3d12renderer.cpp LIBS += -ld3d12 } + +macos { + HEADERS += metalrenderer.h + SOURCES += metalrenderer.mm + LIBS += -framework Metal -framework AppKit +} diff --git a/examples/quick/scenegraph/rendernode/rendernode.qrc b/examples/quick/scenegraph/rendernode/rendernode.qrc index 049adcf8a6..5907eab62c 100644 --- a/examples/quick/scenegraph/rendernode/rendernode.qrc +++ b/examples/quick/scenegraph/rendernode/rendernode.qrc @@ -3,5 +3,7 @@ <file>main.qml</file> <file>shader_vert.cso</file> <file>shader_frag.cso</file> + <file>metalshader.vert</file> + <file>metalshader.frag</file> </qresource> </RCC> diff --git a/examples/quick/scenegraph/rendernode/softwarerenderer.cpp b/examples/quick/scenegraph/rendernode/softwarerenderer.cpp index 0a0ec4b485..bba364ac97 100644 --- a/examples/quick/scenegraph/rendernode/softwarerenderer.cpp +++ b/examples/quick/scenegraph/rendernode/softwarerenderer.cpp @@ -54,11 +54,6 @@ #include <QSGRendererInterface> #include <QPainter> -SoftwareRenderNode::SoftwareRenderNode(QQuickItem *item) - : m_item(item) -{ -} - SoftwareRenderNode::~SoftwareRenderNode() { releaseResources(); @@ -70,8 +65,10 @@ void SoftwareRenderNode::releaseResources() void SoftwareRenderNode::render(const RenderState *renderState) { - QSGRendererInterface *rif = m_item->window()->rendererInterface(); - QPainter *p = static_cast<QPainter *>(rif->getResource(m_item->window(), QSGRendererInterface::PainterResource)); + Q_ASSERT(m_window); + + QSGRendererInterface *rif = m_window->rendererInterface(); + QPainter *p = static_cast<QPainter *>(rif->getResource(m_window, QSGRendererInterface::PainterResource)); Q_ASSERT(p); const QRegion *clipRegion = renderState->clipRegion(); @@ -81,15 +78,15 @@ void SoftwareRenderNode::render(const RenderState *renderState) p->setTransform(matrix()->toTransform()); p->setOpacity(inheritedOpacity()); - const QPointF p0(m_item->width() - 1, m_item->height() - 1); + const QPointF p0(m_width - 1, m_height - 1); const QPointF p1(0, 0); - const QPointF p2(0, m_item->height() - 1); + const QPointF p2(0, m_height - 1); QPainterPath path(p0); path.lineTo(p1); path.lineTo(p2); path.closeSubpath(); - QLinearGradient gradient(QPointF(0, 0), QPointF(m_item->width(), m_item->height())); + QLinearGradient gradient(QPointF(0, 0), QPointF(m_width, m_height)); gradient.setColorAt(0, Qt::green); gradient.setColorAt(1, Qt::red); @@ -108,5 +105,12 @@ QSGRenderNode::RenderingFlags SoftwareRenderNode::flags() const QRectF SoftwareRenderNode::rect() const { - return QRect(0, 0, m_item->width(), m_item->height()); + return QRect(0, 0, m_width, m_height); +} + +void SoftwareRenderNode::sync(QQuickItem *item) +{ + m_window = item->window(); + m_width = item->width(); + m_height = item->height(); } diff --git a/examples/quick/scenegraph/rendernode/softwarerenderer.h b/examples/quick/scenegraph/rendernode/softwarerenderer.h index cc2aaf7ed3..6091a13ca3 100644 --- a/examples/quick/scenegraph/rendernode/softwarerenderer.h +++ b/examples/quick/scenegraph/rendernode/softwarerenderer.h @@ -57,7 +57,6 @@ class SoftwareRenderNode : public QSGRenderNode { public: - SoftwareRenderNode(QQuickItem *item); ~SoftwareRenderNode(); void render(const RenderState *state) override; @@ -66,8 +65,12 @@ public: RenderingFlags flags() const override; QRectF rect() const override; + void sync(QQuickItem *item); + private: - QQuickItem *m_item; + QQuickWindow *m_window = nullptr; + int m_width = 0; + int m_height = 0; }; #endif |
