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qt5base-lts/tests/manual/rhi/triquadcube/triquadcube.cpp
Laszlo Agocs 8fe16fef28 rhi: Expose compute threadgroup limits in ResourceLimits 
As OpenGL ES and Vulkan ruin the day with the spec mandated minimum
value for max threads per threadgroup being only 128, clients need
a way to decide if their compute shader (local_size_*) is suitable
for use at run time.

Change-Id: I72b4fc97032406340623add82ea4d9544ebe9fdc
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
2020-09-18 09:49:54 +02:00

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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
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****************************************************************************/
// An example exercising more than a single feature. Enables profiling
// (resource logging to a file) and inserts debug markers and sets some
// object names. Can also be used to test MSAA swapchains, swapchain image
// readback, requesting an sRGB swapchain, and some texture features.
#define EXAMPLEFW_PREINIT
#include "../shared/examplefw.h"
#include "trianglerenderer.h"
#include "quadrenderer.h"
#include "texturedcuberenderer.h"
#include "triangleoncuberenderer.h"
#include <QFileInfo>
#include <QFile>
#include <QtGui/private/qrhiprofiler_p.h>
#define PROFILE_TO_FILE
//#define SKIP_PRESENT
//#define USE_MSAA
//#define USE_SRGB_SWAPCHAIN
//#define READBACK_SWAPCHAIN
//#define NO_VSYNC
//#define USE_MIN_SWAPCHAIN_BUFFERS
//#define DECLARE_EXT_CONTENTS
struct {
TriangleRenderer triRenderer;
QuadRenderer quadRenderer;
TexturedCubeRenderer cubeRenderer;
TriangleOnCubeRenderer liveTexCubeRenderer;
bool onScreenOnly = false;
bool triangleOnly = false;
QSize lastOutputSize;
int frameCount = 0;
QFile profOut;
} d;
void preInit()
{
#ifdef PROFILE_TO_FILE
rhiFlags |= QRhi::EnableProfiling;
const QString profFn = QFileInfo(QLatin1String("rhiprof.txt")).absoluteFilePath();
qDebug("Writing profiling output to %s", qPrintable(profFn));
d.profOut.setFileName(profFn);
d.profOut.open(QIODevice::WriteOnly);
#endif
#ifdef SKIP_PRESENT
endFrameFlags |= QRhi::SkipPresent;
#endif
#ifdef USE_MSAA
sampleCount = 4; // enable 4x MSAA (except for the render-to-texture pass)
#endif
#ifdef READBACK_SWAPCHAIN
scFlags |= QRhiSwapChain::UsedAsTransferSource;
#endif
#ifdef USE_SRGB_SWAPCHAIN
scFlags |= QRhiSwapChain::sRGB;
#endif
#ifdef NO_VSYNC
scFlags |= QRhiSwapChain::NoVSync;
#endif
#ifdef USE_MIN_SWAPCHAIN_BUFFERS
scFlags |= QRhiSwapChain::MinimalBufferCount;
#endif
#ifdef DECLARE_EXT_CONTENTS
beginFrameFlags |= QRhi::ExternalContentsInPass;
#endif
// For OpenGL some of these are incorporated into the QSurfaceFormat by
// examplefw.h after returning from here as that is out of the RHI's control.
}
void Window::customInit()
{
#ifdef PROFILE_TO_FILE
m_r->profiler()->setDevice(&d.profOut);
#endif
d.triRenderer.setRhi(m_r);
d.triRenderer.setSampleCount(sampleCount);
d.triRenderer.initResources(m_rp);
if (!d.triangleOnly) {
d.triRenderer.setTranslation(QVector3D(0, 0.5f, 0));
d.quadRenderer.setRhi(m_r);
d.quadRenderer.setSampleCount(sampleCount);
d.quadRenderer.setPipeline(d.triRenderer.pipeline());
d.quadRenderer.initResources(m_rp);
d.quadRenderer.setTranslation(QVector3D(1.5f, -0.5f, 0));
d.cubeRenderer.setRhi(m_r);
d.cubeRenderer.setSampleCount(sampleCount);
d.cubeRenderer.initResources(m_rp);
d.cubeRenderer.setTranslation(QVector3D(0, -0.5f, 0));
}
if (!d.onScreenOnly) {
d.liveTexCubeRenderer.setRhi(m_r);
d.liveTexCubeRenderer.setSampleCount(sampleCount);
d.liveTexCubeRenderer.initResources(m_rp);
d.liveTexCubeRenderer.setTranslation(QVector3D(-2.0f, 0, 0));
}
// Put the gpu mem allocator statistics to the profiling stream after doing
// all the init. (where applicable)
m_r->profiler()->addVMemAllocatorStats();
// Check some features/limits.
qDebug("isFeatureSupported(MultisampleTexture): %d", m_r->isFeatureSupported(QRhi::MultisampleTexture));
qDebug("isFeatureSupported(MultisampleRenderBuffer): %d", m_r->isFeatureSupported(QRhi::MultisampleRenderBuffer));
qDebug("isFeatureSupported(DebugMarkers): %d", m_r->isFeatureSupported(QRhi::DebugMarkers));
qDebug("isFeatureSupported(Timestamps): %d", m_r->isFeatureSupported(QRhi::Timestamps));
qDebug("isFeatureSupported(Instancing): %d", m_r->isFeatureSupported(QRhi::Instancing));
qDebug("isFeatureSupported(CustomInstanceStepRate): %d", m_r->isFeatureSupported(QRhi::CustomInstanceStepRate));
qDebug("isFeatureSupported(PrimitiveRestart): %d", m_r->isFeatureSupported(QRhi::PrimitiveRestart));
qDebug("isFeatureSupported(NonDynamicUniformBuffers): %d", m_r->isFeatureSupported(QRhi::NonDynamicUniformBuffers));
qDebug("isFeatureSupported(NonFourAlignedEffectiveIndexBufferOffset): %d", m_r->isFeatureSupported(QRhi::NonFourAlignedEffectiveIndexBufferOffset));
qDebug("isFeatureSupported(NPOTTextureRepeat): %d", m_r->isFeatureSupported(QRhi::NPOTTextureRepeat));
qDebug("isFeatureSupported(RedOrAlpha8IsRed): %d", m_r->isFeatureSupported(QRhi::RedOrAlpha8IsRed));
qDebug("isFeatureSupported(ElementIndexUint): %d", m_r->isFeatureSupported(QRhi::ElementIndexUint));
qDebug("isFeatureSupported(Compute): %d", m_r->isFeatureSupported(QRhi::Compute));
qDebug("isFeatureSupported(WideLines): %d", m_r->isFeatureSupported(QRhi::WideLines));
qDebug("isFeatureSupported(VertexShaderPointSize): %d", m_r->isFeatureSupported(QRhi::VertexShaderPointSize));
qDebug("isFeatureSupported(BaseVertex): %d", m_r->isFeatureSupported(QRhi::BaseVertex));
qDebug("isFeatureSupported(BaseInstance): %d", m_r->isFeatureSupported(QRhi::BaseInstance));
qDebug("Min 2D texture width/height: %d", m_r->resourceLimit(QRhi::TextureSizeMin));
qDebug("Max 2D texture width/height: %d", m_r->resourceLimit(QRhi::TextureSizeMax));
qDebug("Max color attachment count: %d", m_r->resourceLimit(QRhi::MaxColorAttachments));
qDebug("MaxThreadGroupsPerDimension: %d", m_r->resourceLimit(QRhi::MaxThreadGroupsPerDimension));
qDebug("MaxThreadsPerThreadGroup: %d", m_r->resourceLimit(QRhi::MaxThreadsPerThreadGroup));
qDebug("MaxThreadGroupX: %d", m_r->resourceLimit(QRhi::MaxThreadGroupX));
qDebug("MaxThreadGroupY: %d", m_r->resourceLimit(QRhi::MaxThreadGroupY));
qDebug("MaxThreadGroupZ: %d", m_r->resourceLimit(QRhi::MaxThreadGroupZ));
}
void Window::customRelease()
{
d.triRenderer.releaseResources();
if (!d.triangleOnly) {
d.quadRenderer.releaseResources();
d.cubeRenderer.releaseResources();
}
if (!d.onScreenOnly)
d.liveTexCubeRenderer.releaseResources();
}
void Window::customRender()
{
const QSize outputSize = m_sc->currentPixelSize();
QRhiCommandBuffer *cb = m_sc->currentFrameCommandBuffer();
if (outputSize != d.lastOutputSize) {
d.triRenderer.resize(outputSize);
if (!d.triangleOnly) {
d.quadRenderer.resize(outputSize);
d.cubeRenderer.resize(outputSize);
}
if (!d.onScreenOnly)
d.liveTexCubeRenderer.resize(outputSize);
d.lastOutputSize = outputSize;
}
if (!d.onScreenOnly) {
cb->debugMarkBegin("Offscreen triangle pass");
d.liveTexCubeRenderer.queueOffscreenPass(cb);
cb->debugMarkEnd();
}
QRhiResourceUpdateBatch *u = m_r->nextResourceUpdateBatch();
d.triRenderer.queueResourceUpdates(u);
if (!d.triangleOnly) {
d.quadRenderer.queueResourceUpdates(u);
d.cubeRenderer.queueResourceUpdates(u);
}
if (!d.onScreenOnly)
d.liveTexCubeRenderer.queueResourceUpdates(u);
cb->beginPass(m_sc->currentFrameRenderTarget(), m_clearColor, { 1.0f, 0 }, u);
cb->debugMarkBegin(QByteArrayLiteral("Triangle"));
d.triRenderer.queueDraw(cb, outputSize);
cb->debugMarkEnd();
if (!d.triangleOnly) {
cb->debugMarkMsg(QByteArrayLiteral("More stuff"));
cb->debugMarkBegin(QByteArrayLiteral("Quad"));
d.quadRenderer.queueDraw(cb, outputSize);
cb->debugMarkEnd();
cb->debugMarkBegin(QByteArrayLiteral("Cube"));
d.cubeRenderer.queueDraw(cb, outputSize);
cb->debugMarkEnd();
}
if (!d.onScreenOnly) {
cb->debugMarkMsg(QByteArrayLiteral("Even more stuff"));
cb->debugMarkBegin(QByteArrayLiteral("Cube with offscreen triangle"));
d.liveTexCubeRenderer.queueDraw(cb, outputSize);
cb->debugMarkEnd();
}
QRhiResourceUpdateBatch *passEndUpdates = nullptr;
#ifdef READBACK_SWAPCHAIN
passEndUpdates = m_r->nextResourceUpdateBatch();
QRhiReadbackDescription rb; // no texture given -> backbuffer
QRhiReadbackResult *rbResult = new QRhiReadbackResult;
int frameNo = d.frameCount;
rbResult->completed = [this, rbResult, frameNo] {
{
QImage::Format fmt = rbResult->format == QRhiTexture::BGRA8 ? QImage::Format_ARGB32_Premultiplied
: QImage::Format_RGBA8888_Premultiplied;
const uchar *p = reinterpret_cast<const uchar *>(rbResult->data.constData());
QImage image(p, rbResult->pixelSize.width(), rbResult->pixelSize.height(), fmt);
QString fn = QString::asprintf("frame%d.png", frameNo);
fn = QFileInfo(fn).absoluteFilePath();
qDebug("Saving into %s", qPrintable(fn));
if (m_r->isYUpInFramebuffer())
image.mirrored().save(fn);
else
image.save(fn);
}
delete rbResult;
};
passEndUpdates->readBackTexture(rb, rbResult);
#endif
cb->endPass(passEndUpdates);
d.frameCount += 1;
}
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