Android Renderscript - Rotate Yuv Data In Renderscript

Based on the discussion I had at Camera2 api Imageformat.yuv_420_888 results on rotated image, I wanted to know how to adjust the lookup done via rsGetElementAt_uchar methods so th

Solution 1:

I'm assuming you want the output to be in RGBA, as in your conversion script. You should be able to use an approach like that used in this answer; that is, simply modify the x and y coordinates as the first step in the convert kernel:

//Rotate 90 deg clockwise during the conversion
uchar4 __attribute__((kernel)) convert(uint32_t inX, uint32_t inY)
{
    uint32_t x = wIn - 1 - inY;
    uint32_t y = inX;

    //...rest of the function

Note the changes to the parameter names.

This presumes you have set up the output dimensions correctly (see linked answer). A 270 degree rotation can be accomplished in a similar way.