1 files changed, 94 insertions, 0 deletions
diff --git a/tests/manual/rhi/geometryshader/geometryshader.cpp b/tests/manual/rhi/geometryshader/geometryshader.cpp
new file mode 100644
index 0000000000..e03f247e9f
--- /dev/null
+++ b/tests/manual/rhi/geometryshader/geometryshader.cpp
@@ -0,0 +1,94 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include "../shared/examplefw.h"
+
+static const float points[] = { 0.0f, 0.0f, 0.0f };
+
+struct
+{
+    QVector<QRhiResource *> releasePool;
+    QRhiBuffer *vbuf = nullptr;
+    QRhiBuffer *ubuf = nullptr;
+    QRhiShaderResourceBindings *srb = nullptr;
+    QRhiGraphicsPipeline *ps = nullptr;
+    QRhiResourceUpdateBatch *initialUpdates = nullptr;
+    float radius = 0.0f;
+} d;
+
+void Window::customInit()
+{
+    if (!m_r->isFeatureSupported(QRhi::GeometryShader))
+        qFatal("Geometry shaders are not supported");
+
+    m_clearColor.setRgb(0, 0, 0);
+
+    d.vbuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(points));
+    d.vbuf->create();
+    d.releasePool << d.vbuf;
+
+    d.ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 4);
+    d.ubuf->create();
+    d.releasePool << d.ubuf;
+
+    d.srb = m_r->newShaderResourceBindings();
+    d.releasePool << d.srb;
+    const QRhiShaderResourceBinding::StageFlags geom = QRhiShaderResourceBinding::GeometryStage;
+    d.srb->setBindings({ QRhiShaderResourceBinding::uniformBuffer(0, geom, d.ubuf) });
+    d.srb->create();
+
+    d.ps = m_r->newGraphicsPipeline();
+    d.releasePool << d.ps;
+
+    d.ps->setTopology(QRhiGraphicsPipeline::Points);
+
+    d.ps->setShaderStages(
+            { { QRhiShaderStage::Vertex, getShader(QLatin1String(":/test.vert.qsb")) },
+              { QRhiShaderStage::Geometry, getShader(QLatin1String(":/test.geom.qsb")) },
+              { QRhiShaderStage::Fragment, getShader(QLatin1String(":/test.frag.qsb")) } });
+
+    d.ps->setCullMode(QRhiGraphicsPipeline::Back);
+    d.ps->setDepthTest(true);
+    d.ps->setDepthWrite(true);
+    QRhiVertexInputLayout inputLayout;
+    inputLayout.setBindings({ { 3 * sizeof(float) } });
+    inputLayout.setAttributes({ { 0, 0, QRhiVertexInputAttribute::Float3, 0 } });
+    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, points);
+    d.initialUpdates->updateDynamicBuffer(d.ubuf, 0, 4, &d.radius);
+}
+
+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;
+    }
+
+    u->updateDynamicBuffer(d.ubuf, 0, 4, &d.radius);
+    d.radius = std::fmod(d.radius + 0.01f, 1.0f);
+
+    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);
+    cb->setVertexInput(0, 1, &vbufBinding);
+    cb->draw(1);
+    cb->endPass();
+}