CODEWITHSUNDEEP
direct2drendertarget
Roddy
Roddy

Reputation: 68064

How to access bitmap data of Direct2D Hardware RenderTarget?

I'm using Direct2D with for some simple accelerated image compositing/manipulation, and now need to get the pixel data the RenderTarget to pass it to an encoder.

So far, I've managed this by rendering to a BitmapRenderTarget, then finally drawing the bitmap from that onto a WicBitmapRenderTarget which allows me to Lock an area and get a pointer to the pixels.

However...

This only works if my initial RenderTarget uses D2D1_RENDER_TARGET_TYPE_SOFTWARE, because a hardware rendertarget's bitmap can't be 'shared' with the WicBitmapRenderTarget which only supports software rendering. The software rendering seems significantly slower than hardware.

Is there any way round this? Would I be better off using Direct3D instead?

Upvotes: 4

Views: 198

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