image_data_gpu.cpp

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// Copyright (c) 2025 Alexander Obzherin — Licensed under the zlib License. See LICENSE.md.
 
#include "image_data_gpu.hpp"
#include "image_data.hpp"
#include "i_renderer.hpp"
#include "i_texture_render_resources.hpp"
 
using namespace rendering_engine;
 
ImageDataGpu::ImageDataGpu(std::string path, IRenderer* renderer)
    :
    mPath{path},
    mRenderer{renderer},
    mImageData{nullptr},
    mGpuHandle{nullptr}
{
    mImageData = std::make_unique<ImageData>(path);
}
 
ImageDataGpu::ImageDataGpu(std::vector<uint8_t> const& fileBytes, IRenderer* renderer)
    :
    mPath{},
    mRenderer{ renderer },
    mImageData{ nullptr },
    mGpuHandle{ nullptr }
{
    mImageData = std::make_unique<ImageData>(fileBytes);
}
 
rendering_engine::ImageDataGpu::~ImageDataGpu()
{
}
 
void ImageDataGpu::UploadToGPU()
{
    if (!mRenderer)
    {
        return;
    }
 
    if (mGpuHandle)
    {
        if (mGpuHandle->IsTextureLoadedInGPU())
        {
            ReleaseFromGPU();
        }
    }
    mGpuHandle = std::unique_ptr<ITextureRenderResources>(mRenderer->ProvideTextureRenderResources());
    if (!mGpuHandle)
    {
        return;
    }
    mGpuHandle->LoadToGPU(*mImageData);
}
 
void ImageDataGpu::ReleaseFromGPU()
{
    if (!mRenderer)
    {
        return;
    }
    if (!mGpuHandle)
    {
        return;
    }
 
    mGpuHandle->ReleaseFromGPU();
    mGpuHandle.release();
    mGpuHandle = nullptr;
}
 
bool ImageDataGpu::IsOnGPU() const
{
    if (!mGpuHandle)
    {
        return false;
    }
    mGpuHandle->IsTextureLoadedInGPU();
}
 
size_t rendering_engine::ImageDataGpu::GetSizeInRAM() const
{
    if (!mImageData)
    {
        return 0;
    }
 
    return mImageData->GetSizeInBytes();
}
 
size_t rendering_engine::ImageDataGpu::GetSizeInGPU() const
{
    if (!mGpuHandle)
    {
        return 0;
    }
 
    return mGpuHandle->GetSizeInGPUBytes();
}
 
ImageData const& ImageDataGpu::GetCpuImageData() const
{
    return *mImageData;
}
 
ImageData& ImageDataGpu::GetCpuImageData()
{
    return *mImageData;
}
 
ITextureRenderResources* ImageDataGpu::GetTextureRenderResources() const
{
    return mGpuHandle.get();
}