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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #include "../shared/examplefw.h" |
| #include "../shared/cube.h" |
| #include "../shared/dds_bc1.h" |
| |
| struct { |
| QRhiBuffer *vbuf = nullptr; |
| bool vbufReady = false; |
| QRhiBuffer *ubuf = nullptr; |
| QRhiTexture *tex = nullptr; |
| QRhiSampler *sampler = nullptr; |
| QRhiShaderResourceBindings *srb = nullptr; |
| QRhiGraphicsPipeline *ps = nullptr; |
| |
| float rotation = 0; |
| |
| QByteArrayList compressedData; |
| } d; |
| |
| void Window::customInit() |
| { |
| if (!m_r->isTextureFormatSupported(QRhiTexture::BC1)) |
| qFatal("This backend does not support BC1"); |
| |
| d.vbuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(cube)); |
| d.vbuf->build(); |
| d.vbufReady = false; |
| |
| d.ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 68); |
| d.ubuf->build(); |
| |
| QSize imageSize; |
| d.compressedData = loadBC1(QLatin1String(":/qt256_bc1_9mips.dds"), &imageSize); |
| qDebug() << d.compressedData.count() << imageSize << m_r->mipLevelsForSize(imageSize); |
| |
| d.tex = m_r->newTexture(QRhiTexture::BC1, imageSize, 1, QRhiTexture::MipMapped); |
| d.tex->build(); |
| |
| d.sampler = m_r->newSampler(QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::Linear, |
| QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge); |
| d.sampler->build(); |
| |
| d.srb = m_r->newShaderResourceBindings(); |
| d.srb->setBindings({ |
| QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage, d.ubuf), |
| QRhiShaderResourceBinding::sampledTexture(1, QRhiShaderResourceBinding::FragmentStage, d.tex, d.sampler) |
| }); |
| d.srb->build(); |
| |
| d.ps = m_r->newGraphicsPipeline(); |
| |
| d.ps->setDepthTest(true); |
| d.ps->setDepthWrite(true); |
| d.ps->setDepthOp(QRhiGraphicsPipeline::Less); |
| |
| d.ps->setCullMode(QRhiGraphicsPipeline::Back); |
| d.ps->setFrontFace(QRhiGraphicsPipeline::CCW); |
| |
| const QShader vs = getShader(QLatin1String(":/texture.vert.qsb")); |
| if (!vs.isValid()) |
| qFatal("Failed to load shader pack (vertex)"); |
| const QShader fs = getShader(QLatin1String(":/texture.frag.qsb")); |
| if (!fs.isValid()) |
| qFatal("Failed to load shader pack (fragment)"); |
| |
| d.ps->setShaderStages({ |
| { QRhiShaderStage::Vertex, vs }, |
| { QRhiShaderStage::Fragment, fs } |
| }); |
| |
| QRhiVertexInputLayout inputLayout; |
| inputLayout.setBindings({ |
| { 3 * sizeof(float) }, |
| { 2 * sizeof(float) } |
| }); |
| inputLayout.setAttributes({ |
| { 0, 0, QRhiVertexInputAttribute::Float3, 0 }, |
| { 1, 1, QRhiVertexInputAttribute::Float2, 0 } |
| }); |
| |
| d.ps->setVertexInputLayout(inputLayout); |
| d.ps->setShaderResourceBindings(d.srb); |
| d.ps->setRenderPassDescriptor(m_rp); |
| |
| d.ps->build(); |
| } |
| |
| void Window::customRelease() |
| { |
| delete d.ps; |
| d.ps = nullptr; |
| |
| delete d.srb; |
| d.srb = nullptr; |
| |
| delete d.ubuf; |
| d.ubuf = nullptr; |
| |
| delete d.vbuf; |
| d.vbuf = nullptr; |
| |
| delete d.sampler; |
| d.sampler = nullptr; |
| |
| delete d.tex; |
| d.tex = nullptr; |
| } |
| |
| void Window::customRender() |
| { |
| QRhiResourceUpdateBatch *u = m_r->nextResourceUpdateBatch(); |
| if (!d.vbufReady) { |
| d.vbufReady = true; |
| u->uploadStaticBuffer(d.vbuf, cube); |
| qint32 flip = 0; |
| u->updateDynamicBuffer(d.ubuf, 64, 4, &flip); |
| } |
| if (!d.compressedData.isEmpty()) { |
| QVarLengthArray<QRhiTextureUploadEntry, 16> descEntries; |
| for (int i = 0; i < d.compressedData.count(); ++i) { |
| QRhiTextureSubresourceUploadDescription image(d.compressedData[i].constData(), d.compressedData[i].size()); |
| descEntries.append({ 0, i, image }); |
| } |
| QRhiTextureUploadDescription desc; |
| desc.setEntries(descEntries.cbegin(), descEntries.cend()); |
| u->uploadTexture(d.tex, desc); |
| d.compressedData.clear(); |
| } |
| d.rotation += 1.0f; |
| QMatrix4x4 mvp = m_proj; |
| mvp.scale(0.5f); |
| mvp.rotate(d.rotation, 0, 1, 0); |
| u->updateDynamicBuffer(d.ubuf, 0, 64, mvp.constData()); |
| |
| QRhiCommandBuffer *cb = m_sc->currentFrameCommandBuffer(); |
| 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(); |
| const QRhiCommandBuffer::VertexInput vbufBindings[] = { |
| { d.vbuf, 0 }, |
| { d.vbuf, 36 * 3 * sizeof(float) } |
| }; |
| cb->setVertexInput(0, 2, vbufBindings); |
| cb->draw(36); |
| |
| cb->endPass(); |
| } |