JUCE d2d - one drawImage API (partial image draw) results in bad behaviour

[remaincalm]

Hi there. Thanks for your work on the d2d stuff, seems to be a huge speedup.

There is one API that isn't working properly - drawing from part of another image.
I believe it is this one, when sx and sy are not 0.
void Graphics::drawImage (const Image& imageToDraw,
int dx, int dy, int dw, int dh,
int sx, int sy, int sw, int sh,
const bool fillAlphaChannelWithCurrentBrush) const

I have large filmstrips I use for animating some onscreen elements. I have, say, 100 knob positions on a single wide bitmap, and render a selected one from this large Image based on a control value.

Works fine in the old renderer, breaks on the new renderer.

This code doesn't work anymore:
int xh = 32; // source height
int h = 32; // target height
int selected_frame = /* selected bitmap from filmstrip, maybe 640x32 res*/;
g.drawImage(filmstrip_, 0, 0, (int)h, (int)h, xh * selected_frame, 0, xh, xh); // draw part of an image to part of a target

If I force it to render the first element, the one at (0,0) with
int selected_frame = 0;
.. it works fine. So I think something is going wrong with the offset/translation?

I started tracing into the code and made it as far as Direct2DGraphicsContext::drawImage before I got a bit lost.

If this isn't enough to repro, I'll see if I can put together a minimal test, please let me know.
Thanks again.

[remaincalm]

Resolved by https://forum.juce.com/t/direct2d-preview-branch/59243/9 , thanks