Using GetViewportImage()

[Danchyg1337]

Hello! In R23 we got an interesting feature to play with, but there is not much of an info about how to use it properly. Im talking about BaseDraw::GetViewportImage().

This is what i tried.

AutoAlloc<BaseBitmap> bmp;
maxon::ImageRef imgr = maxon::ImageClasses::IMAGE().Create() iferr_return;
const maxon::PixelFormat rgbFormat = maxon::PixelFormats::RGB::U8();
const auto storageType = maxon::ImagePixelStorageClasses::Normal();

imgr.Init(optW, optH, storageType, rgbFormat) iferr_return;
bmp->Init(optW, optH);
bmp->GetImageRef(SAVEBIT::NONE, true, imgr);
doc->GetActiveBaseDraw()->GetViewportImage(imgr);

ShowBitmap(bmp);

Bitmap is just black, which leads me to conclusion that im using it the wrong way.
How to use this new function properly and save to bitmap?

[Manuel]

hi,

bmp->GetImageRef will retrieve the imageRef used internally.

this is how it's done internally. You have to transfert the data from the imageRef to the bitmap.

	BaseDraw* bd = doc->GetActiveBaseDraw();
	CheckState(bd);

	// Get the viewport image from the viewport renderer
	maxon::ImageRef img;
	bd->GetViewportImage(img);
		

	if (img == nullptr)
		return maxon::NullptrError(MAXON_SOURCE_LOCATION);

	// Transform ImageRef to BaseBitmap in order to show it in the PictureViewer
	const Int w = img.GetWidth();
	const Int h = img.GetHeight();

	AutoAlloc<BaseBitmap> bitmap;
	CheckState(bitmap);

	maxon::PixelFormat rgbf = img.GetPixelFormat();
	Int32 bitsPerColor = (Int32)(rgbf.GetBitsPerPixel().Get() / rgbf.GetChannelCount());
	bitmap->Init((Int32)w, (Int32)h, bitsPerColor == 32 ? 96 : 32);

	maxon::BaseArray<UChar> line;
	line.Resize(w * rgbf.GetBitsPerPixel().GetBytes()) iferr_return;

	maxon::PixelMutableBuffer imageBuffer(line.GetFirst(), rgbf.GetBitsPerPixel());
	maxon::GetPixelHandlerStruct getpixel = img.GetPixelHandler(rgbf, rgbf.GetChannelOffsets(), maxon::ColorProfile(), maxon::GETPIXELHANDLERFLAGS::NONE, nullptr) iferr_return;

	for (Int y = 0; y < h; y++)
	{
		getpixel.GetPixel(maxon::ImagePos(0, y, w), imageBuffer, maxon::GETPIXELFLAGS::NONE) iferr_return;
		bitmap->SetPixelCnt(0, (Int32)y, (Int32)w, line.GetFirst(), (Int32)rgbf.GetBitsPerPixel().GetBytes(), bitsPerColor == 32 ? COLORMODE::RGBf : COLORMODE::RGB, PIXELCNT::NONE);
	}

	ShowBitmap(bitmap);

Cheers,
Manuel

[Danchyg1337]

@m_magalhaes Thanks a lot! That makes things clear.