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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(256, 57.99999999999999%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMC%3C/text%3E%3C/svg%3E)
This is a follow up from https://stackoverflow.com/questions/67875906/direct2d-tile-limitation?noredirect=1#comment119984097_67875906.
It seems that, when creating custom Direct2D HLSL filters up to 4K resolution the SetRenderingControls work:
D2D1_RENDERING_CONTROLS r4c = {};
m_d2dContext->GetRenderingControls(&r4c);
if (r4c.tileSize.width < (UINT32)wi || r4c.tileSize.height < (UINT32)he)
{
r4c.tileSize.width = wi;
r4c.tileSize.height = he;
m_d2dContext->SetRenderingControls(r4c);
m_d2dContext->GetRenderingControls(&r4c);
nop();
}
This overrides the default 1024x1024 tiling. However this does not work on 8K resolution. It still has tiling and this is a killing for HLSL effects that rely on the entire texture to work, like this lighting.
Is this a bug? Is it a limitation of Direct2D ?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(60.8, 78%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EFX%3C/text%3E%3C/svg%3E)
@Michael Chourdakis , I am looking into this issue, any progress will update here.
Thanks a lot. Note that I 've tested with multiple GPUs, same result even with an RTX 3070 or with software rendering.
According to the docs, it should support the same tile size as the underlying Direct3D, that is 16384.
Update: My native working desktop has a 4K screen.
When I work at my laptop the resolution is 1080p. In that case, there are 4 tiles:
But when I only use 4K, the laptop still renders correctly even if the native resolution is 1920x1080.
Perhaps, when going to 8K, it gets limited by the desktop size?
Just a clue for you.
I would recommend using a bitmap as the input to the effect rather than the image source. Simply drawing the image source into that bitmap should work. They could also create the bitmap from a WIC bitmap source using the D2D API CreateBitmapFromWicBitmap.