Crash on blitImage with different image format

[abu-irrational]

Trying to copy BLImages (with different format) among different BLcontexts, causes a crash.
Here's a minimal fiddle.

// ========================================
BLImage render(const BLContextCreateInfo& cci) {

BLImage img0(400, 400, BL_FORMAT_A8);
BLImage img1(400, 400, BL_FORMAT_XRGB32);
// ... initialize img0 and img1

// copy img1 (RGB) -> img0 (A8) OK
BLContext ctx0(img0);
ctx0.blitImage(BLPointI(0,0),img1);

// copy img0 (A8) -> img1 (RGB) CRASH
BLContext ctx1(img1);
ctx1.blitImage(BLPointI(0,0),img0);

return img1;
}

I have another crash test, but it's difficult to reproduce ...
Surprisingly it's the opposite of the above test case, i.e. blitting a XRGB32 image over an A8 image ...
I'm using the master branch (10-march-2024) and when I try to blit a XRGB32 image in a context with an attached A8 image, I get the following warning
bl::Pipeline::JIT assembling error: InvalidInstruction: vpackuswb xmm@255,
Blend2D error 0x10002 INVALID_STATE

[abu-irrational]

Just a correction:
What I'm trying to do is working with PRGB32 images (not XRGB32 images) and A8 images.
You should then correct the above fiddle script. Anyway, the result is the same.

[kobalicek]

I checked it out and this is indeed a bug.

This needs a fix and a test case so it won't happen again.

Thanks for the report!

[kobalicek]

Update: This will be fixed once aarch64_jit branch is merged.