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// Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "attachmentpack_p.h"
#include <Qt3DRender/private/rendertarget_p.h>
#include <Qt3DRender/private/rendertargetselectornode_p.h>
QT_BEGIN_NAMESPACE
#ifndef GL_BACK_LEFT
#define GL_BACK_LEFT 0x0402
#endif
#ifndef GL_BACK_RIGHT
#define GL_BACK_RIGHT 0x0403
#endif
namespace Qt3DRender {
namespace Render {
AttachmentPack::AttachmentPack()
{
}
AttachmentPack::AttachmentPack(const RenderTarget *target,
AttachmentManager *attachmentManager,
const QList<QRenderTargetOutput::AttachmentPoint> &drawBuffers)
{
// Copy attachments
const auto outputIds = target->renderOutputs();
for (Qt3DCore::QNodeId outputId : outputIds) {
const RenderTargetOutput *output = attachmentManager->lookupResource(outputId);
if (output)
m_attachments.push_back(*output->attachment());
}
// Sort by attachment point
std::sort(m_attachments.begin(),
m_attachments.end(),
[] (const Attachment &a, const Attachment &b) {
return a.m_point < b.m_point;
});
// Create actual DrawBuffers list that is used for glDrawBuffers
// If nothing is specified, use all the attachments as draw buffers
if (drawBuffers.empty()) {
m_drawBuffers.reserve(m_attachments.size());
for (const Attachment &attachment : std::as_const(m_attachments)) {
if ((attachment.m_point >= QRenderTargetOutput::Color0 && attachment.m_point <= QRenderTargetOutput::Color15)
|| attachment.m_point == QRenderTargetOutput::Left
|| attachment.m_point == QRenderTargetOutput::Right)
m_drawBuffers.push_back(attachment.m_point);
}
} else {
m_drawBuffers.reserve(drawBuffers.size());
for (QRenderTargetOutput::AttachmentPoint drawBuffer : drawBuffers) {
if ((drawBuffer >= QRenderTargetOutput::Color0 && drawBuffer <= QRenderTargetOutput::Color15)
|| drawBuffer == QRenderTargetOutput::Left
|| drawBuffer == QRenderTargetOutput::Right)
m_drawBuffers.push_back(drawBuffer);
}
}
}
// return index of given attachment within actual draw buffers list
int AttachmentPack::getDrawBufferIndex(QRenderTargetOutput::AttachmentPoint attachmentPoint) const
{
for (size_t i = 0; i < m_drawBuffers.size(); i++)
if (m_drawBuffers.at(i) == attachmentPoint)
return int(i);
return -1;
}
bool operator ==(const Attachment &a, const Attachment &b)
{
return (a.m_name == b.m_name &&
a.m_mipLevel == b.m_mipLevel &&
a.m_layer == b.m_layer &&
a.m_textureUuid == b.m_textureUuid &&
a.m_point == b.m_point &&
a.m_face == b.m_face);
}
bool operator !=(const Attachment &a, const Attachment &b)
{
return !(a == b);
}
bool operator ==(const AttachmentPack &packA, const AttachmentPack &packB)
{
return (packA.attachments() == packB.attachments() &&
packA.getDrawBuffers() == packB.getDrawBuffers());
}
bool operator !=(const AttachmentPack &packA, const AttachmentPack &packB)
{
return !(packA == packB);
}
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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