diff options
Diffstat (limited to 'src/gui/doc/snippets/code/src_gui_vulkan_qvulkaninstance.cpp')
-rw-r--r-- | src/gui/doc/snippets/code/src_gui_vulkan_qvulkaninstance.cpp | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/src/gui/doc/snippets/code/src_gui_vulkan_qvulkaninstance.cpp b/src/gui/doc/snippets/code/src_gui_vulkan_qvulkaninstance.cpp new file mode 100644 index 0000000000..14ef9ed2d4 --- /dev/null +++ b/src/gui/doc/snippets/code/src_gui_vulkan_qvulkaninstance.cpp @@ -0,0 +1,146 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] + int main(int argc, char **argv) + { + QGuiApplication app(argc, argv); + + QVulkanInstance inst; + if (!inst.create()) + return 1; + + ... + window->setVulkanInstance(&inst); + window->show(); + + return app.exec(); + } +//! [0] + +//! [1] + QVulkanInstance inst; + + // Enable validation layer, if supported. Messages go to qDebug by default. + inst.setLayers(QByteArrayList() << "VK_LAYER_LUNARG_standard_validation"); + + bool ok = inst.create(); + if (!ok) + ... // Vulkan not available + if (!inst.layers().contains("VK_LAYER_LUNARG_standard_validation")) + ... // validation layer not available +//! [1] + +//! [2] + QVulkanInstance inst; + + if (inst.supportedLayers().contains("VK_LAYER_LUNARG_standard_validation")) + ... + + bool ok = inst.create(); + ... +//! [2] + +//! [3] + class VulkanWindow : public QWindow + { + public: + VulkanWindow() { + setSurfaceType(VulkanSurface); + } + + void exposeEvent(QExposeEvent *) { + if (isExposed()) { + if (!m_initialized) { + m_initialized = true; + // initialize device, swapchain, etc. + QVulkanInstance *inst = vulkanInstance(); + QVulkanFunctions *f = inst->functions(); + uint32_t devCount = 0; + f->vkEnumeratePhysicalDevices(inst->vkInstance(), &devCount, nullptr); + ... + // build the first frame + render(); + } + } + } + + bool event(QEvent *e) { + if (e->type() == QEvent::UpdateRequest) + render(); + return QWindow::event(e); + } + + void render() { + ... + requestUpdate(); // render continuously + } + + private: + bool m_initialized = false; + }; + + int main(int argc, char **argv) + { + QGuiApplication app(argc, argv); + + QVulkanInstance inst; + if (!inst.create()) { + qWarning("Vulkan not available"); + return 1; + } + + VulkanWindow window; + window.showMaximized(); + + return app.exec(); + + } +//! [3] |