1 files changed, 155 insertions, 0 deletions
diff --git a/tests/manual/rhi/texturearray/texturearray.cpp b/tests/manual/rhi/texturearray/texturearray.cpp
new file mode 100644
index 0000000000..241f440e01
--- /dev/null
+++ b/tests/manual/rhi/texturearray/texturearray.cpp
@@ -0,0 +1,155 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include "../shared/examplefw.h"
+#include <QElapsedTimer>
+
+// Creates a texture array object with size 4, uploads a different
+// image to each, and cycles through them on-screen.
+
+static const int ARRAY_SIZE = 4;
+static const int UBUF_SIZE = 72;
+
+static float vertexData[] =
+{ // Y up, CCW
+  -0.5f,   0.5f,   0.0f, 0.0f,
+  -0.5f,  -0.5f,   0.0f, 1.0f,
+  0.5f,   -0.5f,   1.0f, 1.0f,
+  0.5f,   0.5f,    1.0f, 0.0f
+};
+
+static quint16 indexData[] =
+{
+    0, 1, 2, 0, 2, 3
+};
+
+struct {
+    QList<QRhiResource *> releasePool;
+    QRhiTexture *texArr = nullptr;
+    QRhiSampler *sampler = nullptr;
+    QRhiShaderResourceBindings *srb = nullptr;
+    QRhiBuffer *vbuf = nullptr;
+    QRhiBuffer *ibuf = nullptr;
+    QRhiBuffer *ubuf = nullptr;
+    QRhiGraphicsPipeline *ps = nullptr;
+    QRhiResourceUpdateBatch *initialUpdates = nullptr;
+    QMatrix4x4 winProj;
+    QElapsedTimer t;
+    int arrayIndex = 0;
+} d;
+
+void Window::customInit()
+{
+    if (!m_r->isFeatureSupported(QRhi::TextureArrays))
+        qFatal("Texture array objects are not supported by this backend");
+
+    d.texArr = m_r->newTextureArray(QRhiTexture::RGBA8, ARRAY_SIZE, QSize(512, 512), 1,
+        // mipmaps will be generated, to exercise that too
+        QRhiTexture::MipMapped | QRhiTexture::UsedWithGenerateMips);
+    d.releasePool << d.texArr;
+    d.texArr->create();
+
+    d.initialUpdates = m_r->nextResourceUpdateBatch();
+
+    QImage img(512, 512, QImage::Format_RGBA8888);
+    img.fill(Qt::red);
+    d.initialUpdates->uploadTexture(d.texArr, QRhiTextureUploadDescription(QRhiTextureUploadEntry(0, 0, QRhiTextureSubresourceUploadDescription(img))));
+    img.fill(Qt::green);
+    d.initialUpdates->uploadTexture(d.texArr, QRhiTextureUploadDescription(QRhiTextureUploadEntry(1, 0, QRhiTextureSubresourceUploadDescription(img))));
+    img.fill(Qt::blue);
+    d.initialUpdates->uploadTexture(d.texArr, QRhiTextureUploadDescription(QRhiTextureUploadEntry(2, 0, QRhiTextureSubresourceUploadDescription(img))));
+    img.fill(Qt::yellow);
+    d.initialUpdates->uploadTexture(d.texArr, QRhiTextureUploadDescription(QRhiTextureUploadEntry(3, 0, QRhiTextureSubresourceUploadDescription(img))));
+
+    d.initialUpdates->generateMips(d.texArr);
+
+    d.sampler = m_r->newSampler(QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::Linear,
+                                QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge);
+    d.releasePool << d.sampler;
+    d.sampler->create();
+
+    d.ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, UBUF_SIZE);
+    d.releasePool << d.ubuf;
+    d.ubuf->create();
+
+    d.srb = m_r->newShaderResourceBindings();
+    d.releasePool << d.srb;
+    d.srb->setBindings({
+        QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage, d.ubuf, 0, UBUF_SIZE),
+        QRhiShaderResourceBinding::sampledTexture(1, QRhiShaderResourceBinding::FragmentStage, d.texArr, d.sampler)
+    });
+    d.srb->create();
+
+    d.vbuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(vertexData));
+    d.releasePool << d.vbuf;
+    d.vbuf->create();
+
+    d.ibuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::IndexBuffer, sizeof(indexData));
+    d.releasePool << d.ibuf;
+    d.ibuf->create();
+
+    d.initialUpdates->uploadStaticBuffer(d.vbuf, 0, sizeof(vertexData), vertexData);
+    d.initialUpdates->uploadStaticBuffer(d.ibuf, indexData);
+
+    d.ps = m_r->newGraphicsPipeline();
+    d.releasePool << d.ps;
+    d.ps->setShaderStages({
+        { QRhiShaderStage::Vertex, getShader(QLatin1String(":/texture_arr.vert.qsb")) },
+        { QRhiShaderStage::Fragment, getShader(QLatin1String(":/texture_arr.frag.qsb")) }
+    });
+    QRhiVertexInputLayout inputLayout;
+    inputLayout.setBindings({ { 4 * sizeof(float) } });
+    inputLayout.setAttributes({
+        { 0, 0, QRhiVertexInputAttribute::Float2, 0 },
+        { 0, 1, QRhiVertexInputAttribute::Float2, quint32(2 * sizeof(float)) }
+    });
+    d.ps->setVertexInputLayout(inputLayout);
+    d.ps->setShaderResourceBindings(d.srb);
+    d.ps->setRenderPassDescriptor(m_rp);
+    d.ps->create();
+
+    d.t.start();
+}
+
+void Window::customRelease()
+{
+    qDeleteAll(d.releasePool);
+    d.releasePool.clear();
+}
+
+void Window::customRender()
+{
+    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;
+        QMatrix4x4 mvp = m_proj;
+        mvp.scale(2);
+        u->updateDynamicBuffer(d.ubuf, 0, 64, mvp.constData());
+        const qint32 flip = 0;
+        u->updateDynamicBuffer(d.ubuf, 64, 4, &flip);
+        u->updateDynamicBuffer(d.ubuf, 68, 4, &d.arrayIndex);
+    }
+
+    if (d.t.elapsed() > 2000) {
+        d.t.restart();
+        d.arrayIndex = (d.arrayIndex + 1) % ARRAY_SIZE;
+        u->updateDynamicBuffer(d.ubuf, 68, 4, &d.arrayIndex);
+    }
+
+    const QSize outputSizeInPixels = m_sc->currentPixelSize();
+    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, d.ibuf, 0, QRhiCommandBuffer::IndexUInt16);
+    cb->drawIndexed(6);
+    cb->endPass();
+}