JUCE 8 / Direct2D—assertion when calling getFromMemory()

Direct2D
1

I’m getting an assertion when calling juce::ImageCache::getFromMemory() with a large filmstrip file.

The filmstrip file is pretty big, 19200 pixels high and I’m getting the following assertion

   #if JUCE_DEBUG
    // Verify that the GPU can handle a bitmap of this size
    //
    // If you need a bitmap larger than this, you'll need to either split it up into multiple bitmaps
    // or use a software image (see SoftwareImageType).
    auto maxBitmapSize = deviceContext->GetMaximumBitmapSize();
    jassert (size.width <= maxBitmapSize && size.height <= maxBitmapSize);
   #endif

The trace is here →

Screenshot 2024-06-14 at 20.35.30
Screenshot 2024-06-14 at 20.35.301894×620 260 KB

I am using SoftwareImageType() for my image, but the assertion is triggered by the Juce getFromMemory() function, so possibly this is a bug?

1 Like
2

This is a known issue and I’m looking into it!

3

I’ve run into a sortof-unrelated issue in Loading bulk PNGs in threads got unsafe when moved to Direct2D? , but I wanted to call out that:

juce::PNGHelpers::createImageFromData
(in your stack trace there)

creates an image with this, which will always use NativeImageType, which will hit the d2d accelerated bitmap size limit:

Image image(hasAlphaChan ? Image::ARGB : Image::RGB, width, height, hasAlphaChan);

I’m looking for a neat way to override this myself (see linked thread above for why)

Cheers

4

We run into the same issue. We have lots of bitmaps organized as filmstrips and their are all too large. I tried to find out, how I could fall back to using the software renderer, but that does not fix this issue, as the bitmap loading isn’t related to the window renderer. Is there a switch to avoid Direct2D entirely ?

5

Bump! same here

6

I’m having the same issue! Filmstrips are not compatible at this time with JUCE 8?

7

Each GPU has a maximum texture size that in turn limits the size of a Direct2D bitmap. I believe the JUCE team is working on an update that supports using multiple Direct2D bitmaps for a single JUCE Image.

Matt

8

Thanks for your patience. We’ve just merged support for very large bitmaps in the Direct2D renderer to the develop branch:

1 Like