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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.
*/
#pragma once
#include "EngineGLImplTraits.hpp"
#include "TextureBase.hpp"
#include "TextureViewGLImpl.hpp" // Required by TextureBase
#include "GLObjectWrapper.hpp"
#include "AsyncWritableResource.hpp"
#include "GLContextState.hpp"
namespace Diligent
{
/// Base implementation of a texture object in OpenGL backend.
class TextureBaseGL : public TextureBase<EngineGLImplTraits>, public AsyncWritableResource
{
public:
using TTextureBase = TextureBase<EngineGLImplTraits>;
using ViewImplType = TextureViewGLImpl;
TextureBaseGL(IReferenceCounters* pRefCounters,
FixedBlockMemoryAllocator& TexViewObjAllocator,
RenderDeviceGLImpl* pDeviceGL,
const TextureDesc& TexDesc,
GLenum BindTarget,
const TextureData* pInitData = nullptr,
bool bIsDeviceInternal = false);
TextureBaseGL(IReferenceCounters* pRefCounters,
FixedBlockMemoryAllocator& TexViewObjAllocator,
RenderDeviceGLImpl* pDeviceGL,
GLContextState& GLState,
const TextureDesc& TexDesc,
GLuint GLTextureHandle,
GLenum BindTarget,
bool bIsDeviceInternal);
/// Initializes a dummy texture (dummy textures are used by the swap chain to
/// proxy default framebuffer).
TextureBaseGL(IReferenceCounters* pRefCounters,
FixedBlockMemoryAllocator& TexViewObjAllocator,
RenderDeviceGLImpl* pDeviceGL,
const TextureDesc& TexDesc,
bool bIsDeviceInternal);
~TextureBaseGL();
virtual void DILIGENT_CALL_TYPE QueryInterface(const INTERFACE_ID& IID, IObject** ppInterface) override;
const GLObjectWrappers::GLTextureObj& GetGLHandle() const { return m_GlTexture; }
/// Implementation of ITextureGL::GetBindTarget().
virtual GLenum DILIGENT_CALL_TYPE GetBindTarget() const override final { return m_BindTarget; }
GLenum GetGLTexFormat() const { return m_GLTexFormat; }
__forceinline void TextureMemoryBarrier(MEMORY_BARRIER RequiredBarriers, class GLContextState& GLContextState);
virtual void AttachToFramebuffer(const struct TextureViewDesc& ViewDesc, GLenum AttachmentPoint) = 0;
void CopyData(DeviceContextGLImpl* pDeviceCtxGL,
TextureBaseGL* pSrcTextureGL,
Uint32 SrcMipLevel,
Uint32 SrcSlice,
const Box* pSrcBox,
Uint32 DstMipLevel,
Uint32 DstSlice,
Uint32 DstX,
Uint32 DstY,
Uint32 DstZ);
/// Implementation of ITextureGL::GetGLTextureHandle().
virtual GLuint DILIGENT_CALL_TYPE GetGLTextureHandle() override final { return GetGLHandle(); }
/// Implementation of ITexture::GetNativeHandle() in OpenGL backend.
virtual void* DILIGENT_CALL_TYPE GetNativeHandle() override final
{
return reinterpret_cast<void*>(static_cast<size_t>(GetGLTextureHandle()));
}
virtual void UpdateData(class GLContextState& CtxState,
Uint32 MipLevel,
Uint32 Slice,
const Box& DstBox,
const TextureSubResData& SubresData) = 0;
static constexpr Uint32 PBOOffsetAlignment = 4;
IBuffer* GetPBO()
{
return m_pPBO;
}
protected:
virtual void CreateViewInternal(const struct TextureViewDesc& ViewDesc,
ITextureView** ppView,
bool bIsDefaultView) override;
void SetDefaultGLParameters();
GLObjectWrappers::GLTextureObj m_GlTexture;
RefCntAutoPtr<IBuffer> m_pPBO; // For staging textures
const GLenum m_BindTarget;
const GLenum m_GLTexFormat;
//Uint32 m_uiMapTarget;
};
void TextureBaseGL::TextureMemoryBarrier(MEMORY_BARRIER RequiredBarriers, GLContextState& GLContextState)
{
#if GL_ARB_shader_image_load_store
# ifdef DILIGENT_DEBUG
{
constexpr Uint32 TextureBarriers = MEMORY_BARRIER_ALL_TEXTURE_BARRIERS;
VERIFY((RequiredBarriers & TextureBarriers) != 0, "At least one texture memory barrier flag should be set");
VERIFY((RequiredBarriers & ~TextureBarriers) == 0, "Inappropriate texture memory barrier flag");
}
# endif
GLContextState.EnsureMemoryBarrier(RequiredBarriers, this);
#endif
}
} // namespace Diligent
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