void CompressImageBC3(const rgba_surface* input, BYTE* output)
{
CompressBlocksBC3(input, output);
}
static std::unique_ptr<DirectX::ScratchImage> compress_with_ispc(std::unique_ptr<DirectX::ScratchImage> image,
const std::shared_ptr<Spec> spec)
{
HRESULT hr;
auto& meta = image->GetMetadata();
if (meta.format != DXGI_FORMAT_R8G8B8A8_UNORM) {
auto temp = std::make_unique<DirectX::ScratchImage>();
hr = DirectX::Convert(image->GetImages(), image->GetImageCount(), image->GetMetadata(),
DXGI_FORMAT_R8G8B8A8_UNORM, DirectX::TEX_FILTER_DEFAULT, 0.5f, *temp);
if (FAILED(hr)) {
printf(_T(" DirectX::Convert failed. ret = 0x%x\n"), hr);
return nullptr;
}
image = std::move(temp);
}
auto width = static_cast<uint32_t>(image->GetMetadata().width);
auto height = static_cast<uint32_t>(image->GetMetadata().height);
DirectX::Blob blob;
hr = blob.Initialize(compute_image_size(spec->format, width, height));
if (FAILED(hr)) {
printf(_T(" DirectX::Blob::Initialize failed. ret = 0x%x\n"), hr);
return nullptr;
}
rgba_surface surface;
surface.ptr = image->GetPixels();
surface.width = width;
surface.height = height;
surface.stride = width * 4; // The format must be DXGI_FORMAT_R8G8B8A8_UNORM.
switch (spec->format) {
case DXGI_FORMAT_BC1_UNORM:
CompressBlocksBC1(&surface, static_cast<uint8_t*>(blob.GetBufferPointer()));
break;
case DXGI_FORMAT_BC3_UNORM:
CompressBlocksBC3(&surface, static_cast<uint8_t*>(blob.GetBufferPointer()));
break;
case DXGI_FORMAT_BC6H_UF16:
{
bc6h_enc_settings setting;
init_bc6h_enc_settings(&setting, spec->level);
CompressBlocksBC6H(&surface, static_cast<uint8_t*>(blob.GetBufferPointer()), &setting);
}
break;
case DXGI_FORMAT_BC7_UNORM:
{
bc7_enc_settings setting;
init_bc7_enc_settings(&setting, spec->level, spec->rgb_mode);
CompressBlocksBC7(&surface, static_cast<uint8_t*>(blob.GetBufferPointer()), &setting);
}
break;
}
hr = image->Initialize2D(spec->format, width, height, 1, 1);
if (FAILED(hr)) {
printf(_T(" DirectX::ScratchImage::Initialize2D failed. ret = 0x%x\n"), hr);
return nullptr;
}
memcpy(image->GetPixels(), blob.GetBufferPointer(), blob.GetBufferSize());
return image;
}
