diff options
Diffstat (limited to 'tests/manual/rhi/tessellation/tessellation.cpp')
-rw-r--r-- | tests/manual/rhi/tessellation/tessellation.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/tests/manual/rhi/tessellation/tessellation.cpp b/tests/manual/rhi/tessellation/tessellation.cpp new file mode 100644 index 0000000000..a50ddeeeb2 --- /dev/null +++ b/tests/manual/rhi/tessellation/tessellation.cpp @@ -0,0 +1,129 @@ +// Copyright (C) 2021 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only + +#include "../shared/examplefw.h" + +static const float tri[] = { + 0.0f, 0.5f, 0.0f, 0.0f, 0.0f, 1.0f, + -0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, + 0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f, +}; + +static const bool INDEXED = false; +static const quint32 indices[] = { 0, 1, 2 }; + +struct { + QVector<QRhiResource *> releasePool; + QRhiBuffer *vbuf = nullptr; + QRhiBuffer *ibuf = nullptr; + QRhiBuffer *ubuf = nullptr; + QRhiShaderResourceBindings *srb = nullptr; + QRhiGraphicsPipeline *ps = nullptr; + QRhiResourceUpdateBatch *initialUpdates = nullptr; + QMatrix4x4 winProj; + float time = 0.0f; +} d; + +void Window::customInit() +{ + if (!m_r->isFeatureSupported(QRhi::Tessellation)) + qFatal("Tessellation is not supported"); + + d.vbuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(tri)); + d.vbuf->create(); + d.releasePool << d.vbuf; + + if (INDEXED) { + d.ibuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::IndexBuffer, sizeof(indices)); + d.ibuf->create(); + d.releasePool << d.ibuf; + } + + d.ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 64 + 4 + 4); + d.ubuf->create(); + d.releasePool << d.ubuf; + + d.srb = m_r->newShaderResourceBindings(); + d.releasePool << d.srb; + const QRhiShaderResourceBinding::StageFlags tese = QRhiShaderResourceBinding::TessellationEvaluationStage; + d.srb->setBindings({ QRhiShaderResourceBinding::uniformBuffer(0, tese, d.ubuf) }); + d.srb->create(); + + d.ps = m_r->newGraphicsPipeline(); + d.releasePool << d.ps; + + d.ps->setTopology(QRhiGraphicsPipeline::Patches); + d.ps->setPatchControlPointCount(3); + + d.ps->setShaderStages({ + { QRhiShaderStage::Vertex, getShader(QLatin1String(":/test.vert.qsb")) }, + { QRhiShaderStage::TessellationControl, getShader(QLatin1String(":/test.tesc.qsb")) }, + { QRhiShaderStage::TessellationEvaluation, getShader(QLatin1String(":/test.tese.qsb")) }, + { QRhiShaderStage::Fragment, getShader(QLatin1String(":/test.frag.qsb")) } + }); + + d.ps->setCullMode(QRhiGraphicsPipeline::Back); + d.ps->setPolygonMode(QRhiGraphicsPipeline::Line); + d.ps->setDepthTest(true); + d.ps->setDepthWrite(true); + QRhiVertexInputLayout inputLayout; + inputLayout.setBindings({ + { 6 * sizeof(float) } + }); + inputLayout.setAttributes({ + { 0, 0, QRhiVertexInputAttribute::Float3, 0 }, + { 0, 1, QRhiVertexInputAttribute::Float3, 3 * sizeof(float) } + }); + d.ps->setVertexInputLayout(inputLayout); + d.ps->setShaderResourceBindings(d.srb); + d.ps->setRenderPassDescriptor(m_rp); + d.ps->create(); + + d.initialUpdates = m_r->nextResourceUpdateBatch(); + d.initialUpdates->uploadStaticBuffer(d.vbuf, tri); + + const float amplitude = 0.5f; + d.initialUpdates->updateDynamicBuffer(d.ubuf, 68, 4, &litude); + + if (INDEXED) + d.initialUpdates->uploadStaticBuffer(d.ibuf, indices); +} + +void Window::customRelease() +{ + qDeleteAll(d.releasePool); + d.releasePool.clear(); +} + +void Window::customRender() +{ + const QSize outputSizeInPixels = m_sc->currentPixelSize(); + QRhiCommandBuffer *cb = m_sc->currentFrameCommandBuffer(); + QRhiResourceUpdateBatch *u = m_r->nextResourceUpdateBatch(); + if (d.initialUpdates) { + u->merge(d.initialUpdates); + d.initialUpdates->release(); + d.initialUpdates = nullptr; + } + if (d.winProj != m_proj) { + d.winProj = m_proj; + u->updateDynamicBuffer(d.ubuf, 0, 64, d.winProj.constData()); + } + u->updateDynamicBuffer(d.ubuf, 64, 4, &d.time); + d.time += 0.01f; + + cb->beginPass(m_sc->currentFrameRenderTarget(), m_clearColor, { 1.0f, 0 }, u); + cb->setGraphicsPipeline(d.ps); + cb->setViewport({ 0, 0, float(outputSizeInPixels.width()), float(outputSizeInPixels.height()) }); + cb->setShaderResources(); + QRhiCommandBuffer::VertexInput vbufBinding(d.vbuf, 0); + if (INDEXED) { + cb->setVertexInput(0, 1, &vbufBinding, d.ibuf, 0, QRhiCommandBuffer::IndexUInt32); + cb->drawIndexed(3); + } else { + cb->setVertexInput(0, 1, &vbufBinding); + cb->draw(3); + } + + cb->endPass(); +} |