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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "pch.h"
#include "BufferViewGLImpl.hpp"
#include "RenderDeviceGLImpl.hpp"
#include "DeviceContextGLImpl.hpp"
#include "BufferGLImpl.hpp"
#include "GLTypeConversions.hpp"
namespace Diligent
{
BufferViewGLImpl::BufferViewGLImpl(IReferenceCounters* pRefCounters,
RenderDeviceGLImpl* pDevice,
IDeviceContext* pContext,
const BufferViewDesc& ViewDesc,
BufferGLImpl* pBuffer,
bool bIsDefaultView) :
// clang-format off
TBuffViewBase
{
pRefCounters,
pDevice,
ViewDesc,
pBuffer,
bIsDefaultView
},
m_GLTexBuffer{false}
// clang-format on
{
const auto& BuffDesc = pBuffer->GetDesc();
if ((ViewDesc.ViewType == BUFFER_VIEW_SHADER_RESOURCE || ViewDesc.ViewType == BUFFER_VIEW_UNORDERED_ACCESS) &&
(BuffDesc.Mode == BUFFER_MODE_FORMATTED || BuffDesc.Mode == BUFFER_MODE_RAW))
{
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable : 4127) // conditional expression is constant
#endif
VERIFY(GL_TEXTURE_BUFFER != 0, "GL texture buffers are not supported");
#ifdef _MSC_VER
# pragma warning(pop)
#endif
auto* pContextGL = ValidatedCast<DeviceContextGLImpl>(pContext);
auto& ContextState = pContextGL->GetContextState();
m_GLTexBuffer.Create();
ContextState.BindTexture(-1, GL_TEXTURE_BUFFER, m_GLTexBuffer);
const auto& BuffFmt = ViewDesc.Format;
GLenum GLFormat = 0;
if (BuffDesc.Mode == BUFFER_MODE_FORMATTED || BuffFmt.ValueType != VT_UNDEFINED)
{
GLFormat = TypeToGLTexFormat(BuffFmt.ValueType, BuffFmt.NumComponents, BuffFmt.IsNormalized);
}
else
{
GLFormat = GL_R32UI;
}
if (ViewDesc.ByteOffset == 0 && ViewDesc.ByteWidth == BuffDesc.uiSizeInBytes)
glTexBuffer(GL_TEXTURE_BUFFER, GLFormat, pBuffer->GetGLHandle());
else
{
#if GL_ARB_texture_buffer_range
glTexBufferRange(GL_TEXTURE_BUFFER, GLFormat, pBuffer->GetGLHandle(), ViewDesc.ByteOffset, ViewDesc.ByteWidth);
#else
LOG_ERROR_AND_THROW("Unable to create view '", ViewDesc.Name, "' for buffer '", BuffDesc.Name,
"' because GL_ARB_texture_buffer_range extension is not available. "
"Only full-buffer views can be created on this device.");
#endif
}
CHECK_GL_ERROR_AND_THROW("Failed to create texture buffer");
ContextState.BindTexture(-1, GL_TEXTURE_BUFFER, GLObjectWrappers::GLTextureObj(false));
}
}
IMPLEMENT_QUERY_INTERFACE(BufferViewGLImpl, IID_BufferViewGL, TBuffViewBase)
BufferViewGLImpl::~BufferViewGLImpl()
{
}
} // namespace Diligent
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