mirror of
https://github.com/crystalidea/qt6windows7.git
synced 2024-11-29 23:45:50 +08:00
248 lines
8.8 KiB
C++
248 lines
8.8 KiB
C++
// Copyright (C) 2018 The Qt Company Ltd.
|
|
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
|
|
|
|
#include "../shared/examplefw.h"
|
|
|
|
// Exercises MRT, by attaching 4 textures to a single QRhiTextureRenderTarget.
|
|
// The fragment shader outputs to all four targets.
|
|
// The textures are then used to render 4 quads, so their contents can be confirmed.
|
|
|
|
const int ATTCOUNT = 4;
|
|
|
|
static float quadVertexData[] =
|
|
{ // Y up, CCW
|
|
-0.5f, 0.5f, 0.0f, 0.0f,
|
|
-0.5f, -0.5f, 0.0f, 1.0f,
|
|
0.5f, -0.5f, 1.0f, 1.0f,
|
|
0.5f, 0.5f, 1.0f, 0.0f
|
|
};
|
|
|
|
static quint16 quadIndexData[] =
|
|
{
|
|
0, 1, 2, 0, 2, 3
|
|
};
|
|
|
|
static float triangleData[] =
|
|
{ // Y up, CCW
|
|
0.0f, 0.5f, 1.0f, 0.0f, 0.0f,
|
|
-0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
|
|
0.5f, -0.5f, 0.0f, 0.0f, 1.0f,
|
|
};
|
|
|
|
struct {
|
|
QList<QRhiResource *> releasePool;
|
|
QRhiBuffer *vbuf = nullptr;
|
|
QRhiBuffer *ibuf = nullptr;
|
|
QRhiBuffer *ubuf = nullptr;
|
|
QRhiTextureRenderTarget *rt = nullptr;
|
|
QRhiRenderPassDescriptor *rtRp = nullptr;
|
|
QRhiSampler *sampler = nullptr;
|
|
QRhiGraphicsPipeline *ps = nullptr;
|
|
QRhiResourceUpdateBatch *initialUpdates = nullptr;
|
|
QMatrix4x4 winProj;
|
|
struct PerColorBuffer {
|
|
QRhiTexture *tex = nullptr;
|
|
QRhiShaderResourceBindings *srb = nullptr;
|
|
};
|
|
PerColorBuffer colData[ATTCOUNT];
|
|
|
|
QRhiBuffer *triUbuf = nullptr;
|
|
QRhiShaderResourceBindings *triSrb = nullptr;
|
|
QRhiGraphicsPipeline *triPs = nullptr;
|
|
float triRot = 0;
|
|
QMatrix4x4 triBaseMvp;
|
|
} d;
|
|
|
|
void Window::customInit()
|
|
{
|
|
qDebug("Max color attachments: %d", m_r->resourceLimit(QRhi::MaxColorAttachments));
|
|
if (m_r->resourceLimit(QRhi::MaxColorAttachments) < 4)
|
|
qWarning("MRT is not supported");
|
|
|
|
d.vbuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(quadVertexData) + sizeof(triangleData));
|
|
d.vbuf->create();
|
|
d.releasePool << d.vbuf;
|
|
|
|
d.ibuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::IndexBuffer, sizeof(quadIndexData));
|
|
d.ibuf->create();
|
|
d.releasePool << d.ibuf;
|
|
|
|
const int oneRoundedUniformBlockSize = m_r->ubufAligned(68);
|
|
d.ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, oneRoundedUniformBlockSize * ATTCOUNT);
|
|
d.ubuf->create();
|
|
d.releasePool << d.ubuf;
|
|
|
|
d.sampler = m_r->newSampler(QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::None,
|
|
QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge);
|
|
d.releasePool << d.sampler;
|
|
d.sampler->create();
|
|
|
|
for (int i = 0; i < ATTCOUNT; ++i) {
|
|
QRhiTexture *tex = m_r->newTexture(QRhiTexture::RGBA8, QSize(512, 512), 1, QRhiTexture::RenderTarget);
|
|
d.releasePool << tex;
|
|
tex->create();
|
|
|
|
QRhiShaderResourceBindings *srb = m_r->newShaderResourceBindings();
|
|
d.releasePool << srb;
|
|
srb->setBindings({
|
|
QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage,
|
|
d.ubuf, i * oneRoundedUniformBlockSize, 68),
|
|
QRhiShaderResourceBinding::sampledTexture(1, QRhiShaderResourceBinding::FragmentStage, tex, d.sampler)
|
|
});
|
|
srb->create();
|
|
|
|
d.colData[i].tex = tex;
|
|
d.colData[i].srb = srb;
|
|
}
|
|
|
|
QRhiTextureRenderTargetDescription rtDesc;
|
|
QRhiColorAttachment att[ATTCOUNT];
|
|
for (int i = 0; i < ATTCOUNT; ++i)
|
|
att[i] = QRhiColorAttachment(d.colData[i].tex);
|
|
rtDesc.setColorAttachments(att, att + ATTCOUNT);
|
|
d.rt = m_r->newTextureRenderTarget(rtDesc);
|
|
d.releasePool << d.rt;
|
|
d.rtRp = d.rt->newCompatibleRenderPassDescriptor();
|
|
d.releasePool << d.rtRp;
|
|
d.rt->setRenderPassDescriptor(d.rtRp);
|
|
d.rt->create();
|
|
|
|
d.ps = m_r->newGraphicsPipeline();
|
|
d.releasePool << d.ps;
|
|
d.ps->setShaderStages({
|
|
{ QRhiShaderStage::Vertex, getShader(QLatin1String(":/texture.vert.qsb")) },
|
|
{ QRhiShaderStage::Fragment, getShader(QLatin1String(":/texture.frag.qsb")) }
|
|
});
|
|
QRhiVertexInputLayout inputLayout;
|
|
inputLayout.setBindings({
|
|
{ 4 * sizeof(float) }
|
|
});
|
|
inputLayout.setAttributes({
|
|
{ 0, 0, QRhiVertexInputAttribute::Float2, 0 },
|
|
{ 0, 1, QRhiVertexInputAttribute::Float2, quint32(2 * sizeof(float)) }
|
|
});
|
|
d.ps->setVertexInputLayout(inputLayout);
|
|
d.ps->setShaderResourceBindings(d.colData[0].srb); // all of them are layout-compatible
|
|
d.ps->setRenderPassDescriptor(m_rp);
|
|
d.ps->create();
|
|
|
|
d.initialUpdates = m_r->nextResourceUpdateBatch();
|
|
d.initialUpdates->uploadStaticBuffer(d.vbuf, 0, sizeof(quadVertexData), quadVertexData);
|
|
d.initialUpdates->uploadStaticBuffer(d.vbuf, sizeof(quadVertexData), sizeof(triangleData), triangleData);
|
|
d.initialUpdates->uploadStaticBuffer(d.ibuf, quadIndexData);
|
|
|
|
qint32 flip = m_r->isYUpInFramebuffer() ? 1 : 0;
|
|
for (int i = 0; i < ATTCOUNT; ++i)
|
|
d.initialUpdates->updateDynamicBuffer(d.ubuf, i * oneRoundedUniformBlockSize + 64, 4, &flip);
|
|
|
|
// triangle
|
|
d.triUbuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 68);
|
|
d.releasePool << d.triUbuf;
|
|
d.triUbuf->create();
|
|
|
|
d.triSrb = m_r->newShaderResourceBindings();
|
|
d.releasePool << d.triSrb;
|
|
d.triSrb->setBindings({
|
|
QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage, d.triUbuf)
|
|
});
|
|
d.triSrb->create();
|
|
|
|
d.triPs = m_r->newGraphicsPipeline();
|
|
d.releasePool << d.triPs;
|
|
d.triPs->setShaderStages({
|
|
{ QRhiShaderStage::Vertex, getShader(QLatin1String(":/mrt.vert.qsb")) },
|
|
{ QRhiShaderStage::Fragment, getShader(QLatin1String(":/mrt.frag.qsb")) }
|
|
});
|
|
|
|
QRhiGraphicsPipeline::TargetBlend blends[ATTCOUNT]; // defaults to blending == false
|
|
d.triPs->setTargetBlends(blends, blends + ATTCOUNT);
|
|
|
|
inputLayout.setBindings({
|
|
{ 5 * sizeof(float) }
|
|
});
|
|
inputLayout.setAttributes({
|
|
{ 0, 0, QRhiVertexInputAttribute::Float2, 0 },
|
|
{ 0, 1, QRhiVertexInputAttribute::Float3, quint32(2 * sizeof(float)) }
|
|
});
|
|
d.triPs->setVertexInputLayout(inputLayout);
|
|
d.triPs->setShaderResourceBindings(d.triSrb);
|
|
d.triPs->setRenderPassDescriptor(d.rtRp);
|
|
d.triPs->create();
|
|
|
|
d.triBaseMvp = m_r->clipSpaceCorrMatrix();
|
|
d.triBaseMvp.perspective(45.0f, d.rt->pixelSize().width() / float(d.rt->pixelSize().height()), 0.01f, 1000.0f);
|
|
d.triBaseMvp.translate(0, 0, -2);
|
|
float opacity = 1.0f;
|
|
d.initialUpdates->updateDynamicBuffer(d.triUbuf, 64, 4, &opacity);
|
|
}
|
|
|
|
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 triMvp = d.triBaseMvp;
|
|
triMvp.rotate(d.triRot, 0, 1, 0);
|
|
d.triRot += 1;
|
|
u->updateDynamicBuffer(d.triUbuf, 0, 64, triMvp.constData());
|
|
|
|
cb->beginPass(d.rt, QColor::fromRgbF(0.5f, 0.2f, 0.0f, 1.0f), { 1.0f, 0 }, u);
|
|
cb->setGraphicsPipeline(d.triPs);
|
|
cb->setViewport({ 0, 0, float(d.rt->pixelSize().width()), float(d.rt->pixelSize().height()) });
|
|
cb->setShaderResources();
|
|
QRhiCommandBuffer::VertexInput vbufBinding(d.vbuf, quint32(sizeof(quadVertexData)));
|
|
cb->setVertexInput(0, 1, &vbufBinding);
|
|
cb->draw(3);
|
|
cb->endPass();
|
|
|
|
u = m_r->nextResourceUpdateBatch();
|
|
if (d.winProj != m_proj) {
|
|
d.winProj = m_proj;
|
|
const int oneRoundedUniformBlockSize = m_r->ubufAligned(68);
|
|
for (int i = 0; i < ATTCOUNT; ++i) {
|
|
QMatrix4x4 mvp = m_proj;
|
|
switch (i) {
|
|
case 0:
|
|
mvp.translate(-2.0f, 0, 0);
|
|
break;
|
|
case 1:
|
|
mvp.translate(-0.8f, 0, 0);
|
|
break;
|
|
case 2:
|
|
mvp.translate(0.4f, 0, 0);
|
|
break;
|
|
case 3:
|
|
mvp.translate(1.6f, 0, 0);
|
|
break;
|
|
default:
|
|
Q_UNREACHABLE();
|
|
break;
|
|
}
|
|
u->updateDynamicBuffer(d.ubuf, i * oneRoundedUniformBlockSize, 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({ 0, 0, float(outputSizeInPixels.width()), float(outputSizeInPixels.height()) });
|
|
vbufBinding.second = 0;
|
|
cb->setVertexInput(0, 1, &vbufBinding, d.ibuf, 0, QRhiCommandBuffer::IndexUInt16);
|
|
for (int i = 0; i < ATTCOUNT; ++i) {
|
|
cb->setShaderResources(d.colData[i].srb);
|
|
cb->drawIndexed(6);
|
|
}
|
|
cb->endPass();
|
|
}
|