214 lines
7.5 KiB
C++
214 lines
7.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2018 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "../shared/examplefw.h"
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#include "../shared/cube.h"
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#include "../shared/dds_bc1.h"
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struct {
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QRhiBuffer *vbuf = nullptr;
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bool vbufReady = false;
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QRhiBuffer *ubuf = nullptr;
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QRhiTexture *tex = nullptr;
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QRhiSampler *sampler = nullptr;
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QRhiShaderResourceBindings *srb = nullptr;
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QRhiGraphicsPipeline *ps = nullptr;
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float rotation = 0;
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QByteArrayList compressedData;
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QByteArrayList compressedData2;
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} d;
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void Window::customInit()
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{
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if (!m_r->isTextureFormatSupported(QRhiTexture::BC1))
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qFatal("This backend does not support BC1");
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d.vbuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(cube));
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d.vbuf->build();
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d.vbufReady = false;
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d.ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 68);
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d.ubuf->build();
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QSize imageSize;
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d.compressedData = loadBC1(QLatin1String(":/qt256_bc1_9mips.dds"), &imageSize);
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Q_ASSERT(imageSize == QSize(256, 256));
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d.tex = m_r->newTexture(QRhiTexture::BC1, imageSize);
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d.tex->build();
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d.compressedData2 = loadBC1(QLatin1String(":/bwqt224_64_nomips.dds"), &imageSize);
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Q_ASSERT(imageSize == QSize(224, 64));
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d.sampler = m_r->newSampler(QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::None, // no mipmapping here
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QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge);
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d.sampler->build();
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d.srb = m_r->newShaderResourceBindings();
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d.srb->setBindings({
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QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage, d.ubuf),
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QRhiShaderResourceBinding::sampledTexture(1, QRhiShaderResourceBinding::FragmentStage, d.tex, d.sampler)
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});
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d.srb->build();
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d.ps = m_r->newGraphicsPipeline();
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d.ps->setDepthTest(true);
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d.ps->setDepthWrite(true);
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d.ps->setDepthOp(QRhiGraphicsPipeline::Less);
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d.ps->setCullMode(QRhiGraphicsPipeline::Back);
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d.ps->setFrontFace(QRhiGraphicsPipeline::CCW);
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const QShader vs = getShader(QLatin1String(":/texture.vert.qsb"));
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if (!vs.isValid())
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qFatal("Failed to load shader pack (vertex)");
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const QShader fs = getShader(QLatin1String(":/texture.frag.qsb"));
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if (!fs.isValid())
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qFatal("Failed to load shader pack (fragment)");
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d.ps->setShaderStages({
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{ QRhiShaderStage::Vertex, vs },
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{ QRhiShaderStage::Fragment, fs }
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});
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QRhiVertexInputLayout inputLayout;
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inputLayout.setBindings({
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{ 3 * sizeof(float) },
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{ 2 * sizeof(float) }
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});
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inputLayout.setAttributes({
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{ 0, 0, QRhiVertexInputAttribute::Float3, 0 },
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{ 1, 1, QRhiVertexInputAttribute::Float2, 0 }
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});
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d.ps->setVertexInputLayout(inputLayout);
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d.ps->setShaderResourceBindings(d.srb);
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d.ps->setRenderPassDescriptor(m_rp);
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d.ps->build();
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}
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void Window::customRelease()
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{
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delete d.ps;
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d.ps = nullptr;
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delete d.srb;
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d.srb = nullptr;
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delete d.ubuf;
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d.ubuf = nullptr;
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delete d.vbuf;
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d.vbuf = nullptr;
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delete d.sampler;
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d.sampler = nullptr;
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delete d.tex;
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d.tex = nullptr;
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}
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void Window::customRender()
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{
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QRhiResourceUpdateBatch *u = m_r->nextResourceUpdateBatch();
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if (!d.vbufReady) {
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d.vbufReady = true;
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u->uploadStaticBuffer(d.vbuf, cube);
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qint32 flip = 0;
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u->updateDynamicBuffer(d.ubuf, 64, 4, &flip);
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}
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if (!d.compressedData.isEmpty()) {
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{
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QRhiTextureUploadDescription desc({ 0, 0, { d.compressedData[0].constData(), d.compressedData[0].size() } });
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u->uploadTexture(d.tex, desc);
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d.compressedData.clear();
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}
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// now exercise uploading a smaller compressed image into the same texture
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{
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QRhiTextureSubresourceUploadDescription image(d.compressedData2[0].constData(), d.compressedData2[0].size());
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// positions and sizes must be multiples of 4 here (for BC1)
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image.setDestinationTopLeft(QPoint(16, 32));
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// the image is smaller than the subresource size (224x64 vs
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// 256x256) so the size must be specified manually
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image.setSourceSize(QSize(224, 64));
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QRhiTextureUploadDescription desc({ 0, 0, image });
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u->uploadTexture(d.tex, desc);
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d.compressedData2.clear();
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}
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}
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d.rotation += 1.0f;
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QMatrix4x4 mvp = m_proj;
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mvp.scale(0.5f);
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mvp.rotate(d.rotation, 0, 1, 0);
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u->updateDynamicBuffer(d.ubuf, 0, 64, mvp.constData());
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QRhiCommandBuffer *cb = m_sc->currentFrameCommandBuffer();
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const QSize outputSizeInPixels = m_sc->currentPixelSize();
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cb->beginPass(m_sc->currentFrameRenderTarget(), m_clearColor, { 1.0f, 0 }, u);
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cb->setGraphicsPipeline(d.ps);
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cb->setViewport({ 0, 0, float(outputSizeInPixels.width()), float(outputSizeInPixels.height()) });
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cb->setShaderResources();
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const QRhiCommandBuffer::VertexInput vbufBindings[] = {
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{ d.vbuf, 0 },
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{ d.vbuf, 36 * 3 * sizeof(float) }
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};
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cb->setVertexInput(0, 2, vbufBindings);
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cb->draw(36);
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cb->endPass();
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}
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