GPU-based skia into pixel buffer

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Mick Sam

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Sep 13, 2022, 5:01:24 AM (11 days ago) Sep 13
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Hi,
I wish to lighten the CPU and start using gpu for the rendering.
Due to external software limitation, I cannot use GPU rendering directly but I need render into a pixel buffer and pass it into the external renderer.
I am looking for a sample code that renders using a GPU into buffer.

Clark Kent

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Sep 13, 2022, 5:12:14 AM (11 days ago) Sep 13
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i dont understand

you cannot use GPU rendering directly but you want to render into a pixel buffer USING the GPU ?

Clark Kent

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Sep 13, 2022, 5:14:36 AM (11 days ago) Sep 13
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what exactly are the external software limitations?

On Tuesday, 13 September 2022 at 19:01:24 UTC+10 Mick Sam wrote:

Mick Sam

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Sep 13, 2022, 5:44:40 AM (11 days ago) Sep 13
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I got an interface that accepts a pixel buffer and works mainly as a black box for me.
Image that I am rendering is time consuming (multiple gradients, large resolution) so I wish to render it faster using gpu, but to be compatible with the interface I have to render it offscreen, readPixels and pass as a pixel buffer to be displayed.

Brian Osman

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Sep 13, 2022, 8:49:57 AM (11 days ago) Sep 13
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All of the SkSurface::MakeRenderTarget functions create offscreen surfaces on the GPU. This is the simplest one, you just need to create a GrContext for whatever graphics API you'll be using. Once you have the GPU backed surface, you can use it just like a CPU-backed surface, and then call readPixels at the end to get the result.

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