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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#define EXAMPLEFW_IMGUI
#include "../shared/examplefw.h"
#include "../shared/cube.h"
struct {
QMatrix4x4 winProj;
QList<QRhiResource *> releasePool;
QRhiResourceUpdateBatch *initialUpdates = nullptr;
QRhiBuffer *vbuf = nullptr;
QRhiBuffer *ubuf = nullptr;
QRhiTexture *tex = nullptr;
QRhiSampler *sampler = nullptr;
QRhiShaderResourceBindings *srb = nullptr;
QRhiGraphicsPipeline *ps = nullptr;
bool showDemoWindow = true;
float rotation = 0.0f;
} d;
void Window::customInit()
{
d.initialUpdates = m_r->nextResourceUpdateBatch();
d.vbuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(cube));
d.vbuf->create();
d.releasePool << d.vbuf;
d.initialUpdates->uploadStaticBuffer(d.vbuf, cube);
d.ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 68);
d.ubuf->create();
d.releasePool << d.ubuf;
float opacity = 1.0f;
d.initialUpdates->updateDynamicBuffer(d.ubuf, 64, 4, &opacity);
QImage image = QImage(QLatin1String(":/qt256.png")).convertToFormat(QImage::Format_RGBA8888).mirrored();
d.tex = m_r->newTexture(QRhiTexture::RGBA8, QSize(image.width(), image.height()), 1, {});
d.releasePool << d.tex;
d.tex->create();
d.initialUpdates->uploadTexture(d.tex, image);
d.sampler = m_r->newSampler(QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::None,
QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge);
d.releasePool << d.sampler;
d.sampler->create();
d.srb = m_r->newShaderResourceBindings();
d.releasePool << d.srb;
d.srb->setBindings({
QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage, d.ubuf),
QRhiShaderResourceBinding::sampledTexture(1, QRhiShaderResourceBinding::FragmentStage, d.tex, d.sampler)
});
d.srb->create();
d.ps = m_r->newGraphicsPipeline();
d.releasePool << d.ps;
d.ps->setCullMode(QRhiGraphicsPipeline::Back);
const QRhiShaderStage stages[] = {
{ QRhiShaderStage::Vertex, getShader(QLatin1String(":/texture.vert.qsb")) },
{ QRhiShaderStage::Fragment, getShader(QLatin1String(":/texture.frag.qsb")) }
};
d.ps->setShaderStages(stages, stages + 2);
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->create();
}
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;
}
QMatrix4x4 mvp = m_proj;
mvp.rotate(d.rotation, 0, 1, 0);
u->updateDynamicBuffer(d.ubuf, 0, 64, mvp.constData());
const QSize outputSizeInPixels = m_sc->currentPixelSize();
cb->beginPass(m_sc->currentFrameRenderTarget(), m_clearColor, { 1.0f, 0 }, u);
cb->setGraphicsPipeline(d.ps);
cb->setViewport(QRhiViewport(0, 0, outputSizeInPixels.width(), outputSizeInPixels.height()));
cb->setShaderResources();
const QRhiCommandBuffer::VertexInput vbufBindings[] = {
{ d.vbuf, 0 },
{ d.vbuf, quint32(36 * 3 * sizeof(float)) }
};
cb->setVertexInput(0, 2, vbufBindings);
cb->draw(36);
m_imguiRenderer->render();
cb->endPass();
}
void Window::customGui()
{
ImGui::ShowDemoWindow(&d.showDemoWindow);
ImGui::SetNextWindowPos(ImVec2(50, 120), ImGuiCond_FirstUseEver);
ImGui::SetNextWindowSize(ImVec2(400, 100), ImGuiCond_FirstUseEver);
ImGui::Begin("Test");
ImGui::SliderFloat("Rotation", &d.rotation, 0.0f, 360.0f);
ImGui::End();
}
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