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, &amplitude);
+
+    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();
+}