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/****************************************************************************
**
** Copyright (C) 2020 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#include "rhibuffer_p.h"
#include <submissioncontext_p.h>
#include <QtGui/private/qrhi_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
namespace Rhi {
namespace {
QRhiBuffer::UsageFlag bufferTypeToRhi(RHIBuffer::Type t)
{
switch (t) {
case RHIBuffer::Type::ArrayBuffer:
return QRhiBuffer::VertexBuffer;
case RHIBuffer::Type::IndexBuffer:
return QRhiBuffer::IndexBuffer;
case RHIBuffer::Type::UniformBuffer:
return QRhiBuffer::UniformBuffer;
default:
RHI_UNIMPLEMENTED;
return QRhiBuffer::StorageBuffer;
}
}
}
// A UBO is created for each ShaderData Shader Pair
// That means a UBO is unique to a shader/shaderdata
RHIBuffer::RHIBuffer() : m_bufferId(0), m_dynamic(true), m_lastTarget(GL_ARRAY_BUFFER) { }
bool RHIBuffer::bind(SubmissionContext *ctx, Type t)
{
assert(ctx->m_currentUpdates);
if (this->m_datasToUpload.empty())
return bool(m_rhiBuffer);
const auto uploadMethod = m_dynamic ? &QRhiResourceUpdateBatch::updateDynamicBuffer
: qOverload<QRhiBuffer *, int, int, const void *>(
&QRhiResourceUpdateBatch::uploadStaticBuffer);
if (!m_rhiBuffer) {
if (m_allocSize <= 0)
return false;
const auto kind = m_dynamic ? QRhiBuffer::Dynamic : QRhiBuffer::Static;
const auto usage = bufferTypeToRhi(t);
// RHI does not seem to support using the same buffer with different types
if (m_rhiBuffer)
assert(m_rhiBuffer->usage() == usage);
if (!m_rhiBuffer)
m_rhiBuffer = ctx->rhi()->newBuffer(kind, usage, m_allocSize);
assert(m_rhiBuffer);
m_rhiBuffer->build();
#if defined(QT_DEBUG)
{
// for debug: we set the buffer to zero
auto ptr = new char[m_allocSize] {};
(ctx->m_currentUpdates->*uploadMethod)(m_rhiBuffer, 0, m_allocSize, ptr);
delete[] ptr;
}
#endif
}
for (const std::pair<QByteArray, int> &pair : this->m_datasToUpload) {
const QByteArray &data = pair.first;
int offset = pair.second;
(ctx->m_currentUpdates->*uploadMethod)(m_rhiBuffer, offset, data.size(), data.constData());
}
m_datasToUpload.clear();
return true;
}
bool RHIBuffer::release(SubmissionContext *ctx)
{
if (m_rhiBuffer)
m_rhiBuffer->release();
return true;
}
bool RHIBuffer::create(SubmissionContext *ctx)
{
return true;
}
void RHIBuffer::destroy(SubmissionContext *ctx)
{
if (m_rhiBuffer) {
m_rhiBuffer->releaseAndDestroyLater();
m_rhiBuffer = nullptr;
}
m_allocSize = 0;
}
void RHIBuffer::orphan(SubmissionContext *)
{
m_datasToUpload.clear();
if (m_rhiBuffer) {
m_rhiBuffer->releaseAndDestroyLater();
m_rhiBuffer = nullptr;
}
m_allocSize = 0;
}
void RHIBuffer::allocate(SubmissionContext *ctx, const QByteArray &data, bool dynamic)
{
m_datasToUpload.clear();
m_datasToUpload.push_back({ data, 0 });
m_allocSize = data.size();
m_dynamic = dynamic;
}
void RHIBuffer::update(SubmissionContext *ctx, const QByteArray &data, int offset)
{
m_datasToUpload.push_back({ data, offset });
}
QByteArray RHIBuffer::download(SubmissionContext *ctx, uint size)
{
RHI_UNIMPLEMENTED;
// char *gpu_ptr = ctx->mapBuffer(m_lastTarget, size);
// QByteArray data;
// if (gpu_ptr != nullptr) {
// data.resize(size);
// std::copy(gpu_ptr, gpu_ptr+size, data.data());
// }
// ctx->unmapBuffer(m_lastTarget);
// return data;
return {};
}
void RHIBuffer::bindBufferBase(SubmissionContext *ctx, int bindingPoint, RHIBuffer::Type t)
{
RHI_UNIMPLEMENTED;
// ctx->bindBufferBase(glBufferTypes[t], bindingPoint, m_bufferId);
}
void RHIBuffer::bindBufferBase(SubmissionContext *ctx, int bindingPoint)
{
RHI_UNIMPLEMENTED;
// ctx->bindBufferBase(m_lastTarget, bindingPoint, m_bufferId);
}
void RHIBuffer::cleanup()
{
destroy(nullptr);
}
} // namespace Rhi
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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