6f4aa54131
D3D11 and GL (4.3+, ES 3.1+) will come separately at a later time. Change-Id: If30f2f3d062fa27e57e9912674669225b82a7b93 Reviewed-by: Lars Knoll <lars.knoll@qt.io>
297 lines
11 KiB
C++
297 lines
11 KiB
C++
/****************************************************************************
|
|
**
|
|
** 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
|
|
** distribution.
|
|
** * Neither the name of The Qt Company Ltd nor the names of its
|
|
** contributors may be used to endorse or promote products derived
|
|
** from this software without specific prior written permission.
|
|
**
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
|
|
**
|
|
** $QT_END_LICENSE$
|
|
**
|
|
****************************************************************************/
|
|
|
|
#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 {
|
|
QVector<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->build();
|
|
d.releasePool << d.vbuf;
|
|
|
|
d.ibuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::IndexBuffer, sizeof(quadIndexData));
|
|
d.ibuf->build();
|
|
d.releasePool << d.ibuf;
|
|
|
|
const int oneRoundedUniformBlockSize = m_r->ubufAligned(68);
|
|
d.ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, oneRoundedUniformBlockSize * ATTCOUNT);
|
|
d.ubuf->build();
|
|
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->build();
|
|
|
|
for (int i = 0; i < ATTCOUNT; ++i) {
|
|
QRhiTexture *tex = m_r->newTexture(QRhiTexture::RGBA8, QSize(512, 512), 1, QRhiTexture::RenderTarget);
|
|
d.releasePool << tex;
|
|
tex->build();
|
|
|
|
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->build();
|
|
|
|
d.colData[i].tex = tex;
|
|
d.colData[i].srb = srb;
|
|
}
|
|
|
|
QRhiTextureRenderTargetDescription rtDesc;
|
|
QVector<QRhiColorAttachment> att;
|
|
for (int i = 0; i < ATTCOUNT; ++i)
|
|
att.append(QRhiColorAttachment(d.colData[i].tex));
|
|
rtDesc.setColorAttachments(att);
|
|
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->build();
|
|
|
|
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, 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->build();
|
|
|
|
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->build();
|
|
|
|
d.triSrb = m_r->newShaderResourceBindings();
|
|
d.releasePool << d.triSrb;
|
|
d.triSrb->setBindings({
|
|
QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage, d.triUbuf)
|
|
});
|
|
d.triSrb->build();
|
|
|
|
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")) }
|
|
});
|
|
QVector<QRhiGraphicsPipeline::TargetBlend> blends;
|
|
for (int i = 0; i < ATTCOUNT; ++i) {
|
|
QRhiGraphicsPipeline::TargetBlend blend;
|
|
blends.append(blend);
|
|
}
|
|
d.triPs->setTargetBlends(blends);
|
|
inputLayout.setBindings({
|
|
{ 5 * sizeof(float) }
|
|
});
|
|
inputLayout.setAttributes({
|
|
{ 0, 0, QRhiVertexInputAttribute::Float2, 0 },
|
|
{ 0, 1, QRhiVertexInputAttribute::Float3, 2 * sizeof(float) }
|
|
});
|
|
d.triPs->setVertexInputLayout(inputLayout);
|
|
d.triPs->setShaderResourceBindings(d.triSrb);
|
|
d.triPs->setRenderPassDescriptor(d.rtRp);
|
|
d.triPs->build();
|
|
|
|
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, 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(), QColor::fromRgbF(0.4f, 0.7f, 0.0f, 1.0f), { 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();
|
|
}
|