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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "buffer_p.h"
#include <graphicscontext_p.h>
#if !defined(GL_UNIFORM_BUFFER)
#define GL_UNIFORM_BUFFER 0x8A11
#endif
#if !defined(GL_ARRAY_BUFFER)
#define GL_ARRAY_BUFFER 0x8892
#endif
#if !defined(GL_ELEMENT_ARRAY_BUFFER)
#define GL_ELEMENT_ARRAY_BUFFER 0x8893
#endif
#if !defined(GL_SHADER_STORAGE_BUFFER)
#define GL_SHADER_STORAGE_BUFFER 0x90D2
#endif
#if !defined(GL_PIXEL_PACK_BUFFER)
#define GL_PIXEL_PACK_BUFFER 0x88EB
#endif
#if !defined(GL_PIXEL_UNPACK_BUFFER)
#define GL_PIXEL_UNPACK_BUFFER 0x88EC
#endif
#if !defined(GL_DRAW_INDIRECT_BUFFER)
#define GL_DRAW_INDIRECT_BUFFER 0x8F3F
#endif
#include <QtGui/private/qrhi_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
namespace Rhi {
// A UBO is created for each ShaderData Shader Pair
// That means a UBO is unique to a shader/shaderdata
namespace {
GLenum glBufferTypes[] = {
GL_ARRAY_BUFFER,
GL_UNIFORM_BUFFER,
GL_ELEMENT_ARRAY_BUFFER,
GL_SHADER_STORAGE_BUFFER,
GL_PIXEL_PACK_BUFFER,
GL_PIXEL_UNPACK_BUFFER,
GL_DRAW_INDIRECT_BUFFER
};
} // anonymous
RHIBuffer::RHIBuffer()
: m_bufferId(0)
, m_dynamic(true)
, m_lastTarget(GL_ARRAY_BUFFER)
{
}
bool RHIBuffer::bind(GraphicsContext *ctx, Type t)
{
assert(ctx->m_currentUpdates);
if(this->m_datasToUpload.empty())
return bool(m_rhiBuffer);
if(!m_rhiBuffer)
{
const auto kind = m_dynamic ? QRhiBuffer::Dynamic : QRhiBuffer::Static;
const auto usage = [&] {
if(t == Type::ArrayBuffer) return QRhiBuffer::VertexBuffer;
if(t == Type::IndexBuffer) return QRhiBuffer::IndexBuffer;
if(t == Type::UniformBuffer) return QRhiBuffer::UniformBuffer;
RHI_UNIMPLEMENTED;
return QRhiBuffer::StorageBuffer;
}();
if(m_allocSize <= 0)
return false;
if(m_rhiBuffer && m_rhiBuffer->type() != t)
{
m_rhiBuffer->release();
delete m_rhiBuffer;
m_rhiBuffer = nullptr;
}
if(!m_rhiBuffer)
{
m_rhiBuffer = ctx->m_rhi->newBuffer(kind, usage, m_allocSize);
}
assert(m_rhiBuffer);
m_rhiBuffer->build();
{
// debug: set to zero
char* ptr = (char*)alloca(m_allocSize);
std::fill_n(ptr, m_allocSize, 0);
if(m_dynamic)
{
ctx->m_currentUpdates->updateDynamicBuffer(m_rhiBuffer, 0, m_allocSize, ptr);
}
else
{
ctx->m_currentUpdates->uploadStaticBuffer(m_rhiBuffer, 0, m_allocSize, ptr);
}
}
}
if(m_dynamic)
{
for(const auto& [data, offset] : this->m_datasToUpload)
{
ctx->m_currentUpdates->updateDynamicBuffer(m_rhiBuffer, offset, data.size(), data.constData());
}
}
else
{
for(const auto& [data, offset] : this->m_datasToUpload)
{
ctx->m_currentUpdates->uploadStaticBuffer(m_rhiBuffer, offset, data.size(), data.constData());
}
}
this->m_datasToUpload.clear();
return true;
}
bool RHIBuffer::release(GraphicsContext *ctx)
{
if(m_rhiBuffer)
m_rhiBuffer->release();
return true;
}
bool RHIBuffer::create(GraphicsContext *ctx)
{
return true;
}
void RHIBuffer::destroy(GraphicsContext *ctx)
{
if(m_rhiBuffer)
{
m_rhiBuffer->releaseAndDestroyLater();
m_rhiBuffer = nullptr;
}
m_allocSize = 0;
}
void RHIBuffer::orphan(GraphicsContext *)
{
m_datasToUpload.clear();
if(m_rhiBuffer)
{
m_rhiBuffer->releaseAndDestroyLater();
m_rhiBuffer = nullptr;
}
m_allocSize = 0;
}
void RHIBuffer::allocate(GraphicsContext *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(GraphicsContext *ctx, const QByteArray& data, int offset)
{
m_datasToUpload.push_back({data, offset});
}
QByteArray RHIBuffer::download(GraphicsContext *ctx, uint size)
{
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;
}
void RHIBuffer::bindBufferBase(GraphicsContext *ctx, int bindingPoint, RHIBuffer::Type t)
{
ctx->bindBufferBase(glBufferTypes[t], bindingPoint, m_bufferId);
}
void RHIBuffer::bindBufferBase(GraphicsContext *ctx, int bindingPoint)
{
ctx->bindBufferBase(m_lastTarget, bindingPoint, m_bufferId);
}
} // namespace Rhi
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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