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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "testrhiitem.h"
#include <QFile>
static const QSize TEX_SIZE(512, 512);
void TestRenderer::initialize(QRhiCommandBuffer *)
{
if (m_rhi != rhi()) {
m_rhi = rhi();
scene = {};
}
if (m_sampleCount != renderTarget()->sampleCount()) {
m_sampleCount = renderTarget()->sampleCount();
scene = {};
}
if (!scene.vbuf)
initScene();
const QSize outputSize = renderTarget()->pixelSize();
scene.mvp = m_rhi->clipSpaceCorrMatrix();
scene.mvp.perspective(45.0f, outputSize.width() / (float) outputSize.height(), 0.01f, 1000.0f);
scene.mvp.translate(0, 0, -4);
if (!scene.resourceUpdates)
scene.resourceUpdates = m_rhi->nextResourceUpdateBatch();
scene.resourceUpdates->updateDynamicBuffer(scene.ubuf.get(), 0, 64, scene.mvp.constData());
}
static QShader getShader(const QString &name)
{
QFile f(name);
if (f.open(QIODevice::ReadOnly))
return QShader::fromSerialized(f.readAll());
return QShader();
}
void TestRenderer::updateTexture()
{
QImage img(TEX_SIZE, QImage::Format_RGBA8888);
img.fill(itemData.color);
if (!scene.resourceUpdates)
scene.resourceUpdates = m_rhi->nextResourceUpdateBatch();
scene.resourceUpdates->uploadTexture(scene.tex.get(), img);
}
void TestRenderer::initScene()
{
static const float tri[] = {
0.0f, 0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.0f, 0.0f,
0.5f, -0.5f, 1.0f, 0.0f
};
scene.vbuf.reset(m_rhi->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(tri)));
scene.vbuf->create();
scene.resourceUpdates = m_rhi->nextResourceUpdateBatch();
scene.resourceUpdates->uploadStaticBuffer(scene.vbuf.get(), tri);
scene.ubuf.reset(m_rhi->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 68));
scene.ubuf->create();
const qint32 flip = m_rhi->isYUpInFramebuffer() ? 1 : 0;
scene.resourceUpdates->updateDynamicBuffer(scene.ubuf.get(), 64, 4, &flip);
scene.tex.reset(m_rhi->newTexture(QRhiTexture::RGBA8, TEX_SIZE));
scene.tex->create();
scene.sampler.reset(m_rhi->newSampler(QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::None,
QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge));
scene.sampler->create();
scene.srb.reset(m_rhi->newShaderResourceBindings());
scene.srb->setBindings({
QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage, scene.ubuf.get()),
QRhiShaderResourceBinding::sampledTexture(1, QRhiShaderResourceBinding::FragmentStage, scene.tex.get(), scene.sampler.get())
});
scene.srb->create();
scene.ps.reset(m_rhi->newGraphicsPipeline());
scene.ps->setDepthTest(true);
scene.ps->setDepthWrite(true);
scene.ps->setDepthOp(QRhiGraphicsPipeline::Less);
scene.ps->setCullMode(QRhiGraphicsPipeline::Back);
scene.ps->setFrontFace(QRhiGraphicsPipeline::CCW);
QShader vs = getShader(QLatin1String(":/texture.vert.qsb"));
Q_ASSERT(vs.isValid());
QShader fs = getShader(QLatin1String(":/texture.frag.qsb"));
Q_ASSERT(fs.isValid());
scene.ps->setShaderStages({
{ QRhiShaderStage::Vertex, vs },
{ QRhiShaderStage::Fragment, fs }
});
QRhiVertexInputLayout inputLayout;
inputLayout.setBindings({
{ 4 * sizeof(float) },
});
inputLayout.setAttributes({
{ 0, 0, QRhiVertexInputAttribute::Float2, 0 },
{ 0, 1, QRhiVertexInputAttribute::Float2, 2 * sizeof(float) }
});
scene.ps->setVertexInputLayout(inputLayout);
scene.ps->setSampleCount(m_sampleCount);
scene.ps->setShaderResourceBindings(scene.srb.get());
scene.ps->setRenderPassDescriptor(renderTarget()->renderPassDescriptor());
scene.ps->create();
updateTexture();
}
void TestRenderer::synchronize(QQuickRhiItem *rhiItem)
{
TestRhiItem *item = static_cast<TestRhiItem *>(rhiItem);
if (item->color() != itemData.color) {
itemData.color = item->color();
updateTexture();
}
}
void TestRenderer::render(QRhiCommandBuffer *cb)
{
QRhiResourceUpdateBatch *rub = scene.resourceUpdates;
if (rub)
scene.resourceUpdates = nullptr;
const QColor clearColor = QColor::fromRgbF(0.4f, 0.7f, 0.0f, 1.0f);
cb->beginPass(renderTarget(), clearColor, { 1.0f, 0 }, rub);
cb->setGraphicsPipeline(scene.ps.get());
const QSize outputSize = renderTarget()->pixelSize();
cb->setViewport(QRhiViewport(0, 0, outputSize.width(), outputSize.height()));
cb->setShaderResources();
const QRhiCommandBuffer::VertexInput vbufBindings[] = {
{ scene.vbuf.get(), 0 },
};
cb->setVertexInput(0, 1, vbufBindings);
cb->draw(3);
cb->endPass();
}
void TestRhiItem::setColor(QColor c)
{
if (m_color == c)
return;
m_color = c;
emit colorChanged();
update();
}
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