72a453c6a8
Task-number: QTBUG-113331 Change-Id: I8baa697b4997b05f52acdee0e08d3c368fde5bc2 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
// Copyright (C) 2023 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "examplewidget.h"
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#include <QFile>
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static float vertexData[] = {
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0.0f, 0.5f, 1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
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0.5f, -0.5f, 0.0f, 0.0f, 1.0f,
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};
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//![get-shader]
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static QShader getShader(const QString &name)
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{
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QFile f(name);
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return f.open(QIODevice::ReadOnly) ? QShader::fromSerialized(f.readAll()) : QShader();
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}
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//![get-shader]
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//![init-1]
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void ExampleRhiWidget::initialize(QRhiCommandBuffer *cb)
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{
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if (m_rhi != rhi()) {
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m_pipeline.reset();
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m_rhi = rhi();
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}
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//![init-1]
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//![init-pipeline]
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if (!m_pipeline) {
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m_vbuf.reset(m_rhi->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(vertexData)));
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m_vbuf->create();
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m_ubuf.reset(m_rhi->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 64));
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m_ubuf->create();
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m_srb.reset(m_rhi->newShaderResourceBindings());
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m_srb->setBindings({
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QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage, m_ubuf.get()),
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});
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m_srb->create();
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m_pipeline.reset(m_rhi->newGraphicsPipeline());
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m_pipeline->setShaderStages({
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{ QRhiShaderStage::Vertex, getShader(QLatin1String(":/shader_assets/color.vert.qsb")) },
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{ QRhiShaderStage::Fragment, getShader(QLatin1String(":/shader_assets/color.frag.qsb")) }
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});
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QRhiVertexInputLayout inputLayout;
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inputLayout.setBindings({
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{ 5 * sizeof(float) }
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});
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inputLayout.setAttributes({
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{ 0, 0, QRhiVertexInputAttribute::Float2, 0 },
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{ 0, 1, QRhiVertexInputAttribute::Float3, 2 * sizeof(float) }
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});
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m_pipeline->setVertexInputLayout(inputLayout);
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m_pipeline->setShaderResourceBindings(m_srb.get());
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m_pipeline->setRenderPassDescriptor(renderTarget()->renderPassDescriptor());
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m_pipeline->create();
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QRhiResourceUpdateBatch *resourceUpdates = m_rhi->nextResourceUpdateBatch();
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resourceUpdates->uploadStaticBuffer(m_vbuf.get(), vertexData);
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cb->resourceUpdate(resourceUpdates);
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}
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//![init-pipeline]
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//![init-matrix]
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const QSize outputSize = renderTarget()->pixelSize();
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m_viewProjection = m_rhi->clipSpaceCorrMatrix();
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m_viewProjection.perspective(45.0f, outputSize.width() / (float) outputSize.height(), 0.01f, 1000.0f);
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m_viewProjection.translate(0, 0, -4);
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}
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//![init-matrix]
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//![render-1]
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void ExampleRhiWidget::render(QRhiCommandBuffer *cb)
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{
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QRhiResourceUpdateBatch *resourceUpdates = m_rhi->nextResourceUpdateBatch();
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m_rotation += 1.0f;
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QMatrix4x4 modelViewProjection = m_viewProjection;
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modelViewProjection.rotate(m_rotation, 0, 1, 0);
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resourceUpdates->updateDynamicBuffer(m_ubuf.get(), 0, 64, modelViewProjection.constData());
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//![render-1]
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//![render-pass]
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const QColor clearColor = QColor::fromRgbF(0.4f, 0.7f, 0.0f, 1.0f);
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cb->beginPass(renderTarget(), clearColor, { 1.0f, 0 }, resourceUpdates);
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cb->setGraphicsPipeline(m_pipeline.get());
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const QSize outputSize = renderTarget()->pixelSize();
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cb->setViewport(QRhiViewport(0, 0, outputSize.width(), outputSize.height()));
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cb->setShaderResources();
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const QRhiCommandBuffer::VertexInput vbufBinding(m_vbuf.get(), 0);
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cb->setVertexInput(0, 1, &vbufBinding);
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cb->draw(3);
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cb->endPass();
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//![render-pass]
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//![render-2]
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update();
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}
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//![render-2]
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