Function ConvertPixels

engine/Poseidon/Graphics/Textures/Image.cpp:304–392

// --- ConvertPixels ---

bool ConvertPixels(const void* src, void* dst, int width, int height, PixelFormat srcFmt, PixelFormat dstFmt)
{
    if (srcFmt == dstFmt)
    {
        std::memcpy(dst, src, ComputeDataSize(width, height, srcFmt));
        return true;
    }

    const auto* srcBytes = static_cast<const uint8_t*>(src);
    auto* dstBytes = static_cast<uint8_t*>(dst);

    // If source is RGBA8888, encode directly
    if (srcFmt == PixelFormat::RGBA8888)
    {
        switch (dstFmt)
        {
            case PixelFormat::ARGB4444:
                rgbaToARGB4444(srcBytes, dstBytes, width, height);
                return true;
            case PixelFormat::ARGB1555:
                rgbaToARGB1555(srcBytes, dstBytes, width, height);
                return true;
            case PixelFormat::RGB565:
                rgbaToRGB565(srcBytes, dstBytes, width, height);
                return true;
            case PixelFormat::AI88:
                rgbaToAI88(srcBytes, dstBytes, width, height);
                return true;
            case PixelFormat::ARGB8888:
                rgbaToARGB8888(srcBytes, dstBytes, width, height);
                return true;
            case PixelFormat::DXT1:
            {
                auto compressed = DXTCompressor::CompressDXT1(srcBytes, width, height);
                std::memcpy(dstBytes, compressed.data(), compressed.size());
                return true;
            }
            case PixelFormat::DXT5:
            {
                auto compressed = DXTCompressor::CompressDXT5(srcBytes, width, height);
                std::memcpy(dstBytes, compressed.data(), compressed.size());
                return true;
            }
            default:
                return false;
        }
    }

    // If destination is RGBA8888, decode directly
    if (dstFmt == PixelFormat::RGBA8888)
    {
        switch (srcFmt)
        {
            case PixelFormat::ARGB4444:
                argb4444ToRGBA(srcBytes, dstBytes, width, height);
                return true;
            case PixelFormat::ARGB1555:
                argb1555ToRGBA(srcBytes, dstBytes, width, height);