shader.cpp - mozsearch

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++ // Copyright (C) 2017 The Qt Company Ltd.

++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

++

++ #include "shader.h"

++ #include <QtConcurrentRun>

++ #include <QFile>

++ #include <QVulkanDeviceFunctions>

++

++ void Shader::load(QVulkanInstance *inst, VkDevice dev, const QString &fn)

++ {

++     reset();

++     m_maybeRunning = true;

++     m_future = QtConcurrent::run([inst, dev, fn]() {

++         ShaderData sd;

++         QFile f(fn);

++         if (!f.open(QIODevice::ReadOnly)) {

++             qWarning("Failed to open %s", qPrintable(fn));

++             return sd;

++         }

++         QByteArray blob = f.readAll();

++         VkShaderModuleCreateInfo shaderInfo;

++         memset(&shaderInfo, 0, sizeof(shaderInfo));

++         shaderInfo.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;

++         shaderInfo.codeSize = blob.size();

++         shaderInfo.pCode = reinterpret_cast<const uint32_t *>(blob.constData());

++         VkResult err = inst->deviceFunctions(dev)->vkCreateShaderModule(dev, &shaderInfo, nullptr, &sd.shaderModule);

++         if (err != VK_SUCCESS) {

++             qWarning("Failed to create shader module: %d", err);

++             return sd;

++         }

++         return sd;

++     });

++ }

++

++ ShaderData *Shader::data()

++ {

++     if (m_maybeRunning && !m_data.isValid())

++         m_data = m_future.result();

++

++     return &m_data;

++ }

++

++ void Shader::reset()

++ {

++     *data() = ShaderData();

++     m_maybeRunning = false;

++ }