Method ExportTextureStb

Source/Engine/Tools/TextureTool/TextureTool.stb.cpp:203–340

#endif

bool TextureTool::ExportTextureStb(ImageType type, const StringView& path, const TextureData& textureData)
{
    if (textureData.GetArraySize() != 1)
    {
        LOG(Warning, "Exporting texture arrays and cubemaps is not supported.");
    }
    TextureData const* texture = &textureData;

#if USE_EDITOR
    // Handle compressed textures
    TextureData decompressed;
    texture = stbDecompress(textureData, decompressed);
    if (!texture)
        return true;
#endif

    // Convert into RGBA8
    const auto sampler = PixelFormatSampler::Get(texture->Format);
    if (sampler == nullptr)
    {
        LOG(Warning, "Texture data format {0} is not supported.", (int32)textureData.Format);
        return true;
    }
    const auto srcData = texture->GetData(0, 0);
    const int comp = 4;
    Array<byte> data;
    bool sRGB = PixelFormatExtensions::IsSRGB(texture->Format);
    if (type == ImageType::HDR)
    {
        data.Resize(sizeof(float) * comp * texture->Width * texture->Height);

        auto ptr = (Float4*)data.Get();
        for (int32 y = 0; y < texture->Height; y++)
        {
            for (int32 x = 0; x < texture->Width; x++)
            {
                Color color = sampler->SamplePoint(srcData->Data.Get(), x, y, srcData->RowPitch);
                if (sRGB)
                    color = Color::SrgbToLinear(color);
                *(ptr + x + y * texture->Width) = color.ToFloat4();
            }
        }
    }
    else
    {
        data.Resize(sizeof(Color32) * comp * texture->Width * texture->Height);

        auto ptr = (Color32*)data.Get();
        for (int32 y = 0; y < texture->Height; y++)
        {
            for (int32 x = 0; x < texture->Width; x++)
            {
                Color color = sampler->SamplePoint(srcData->Data.Get(), x, y, srcData->RowPitch);
                if (sRGB)
                    color = Color::SrgbToLinear(color);
                *(ptr + x + y * texture->Width) = Color32(color);
            }
        }