ShaderYUVtoRGB test usage notes：

ShaderYUVtoRGB(const char *yuv_path, SCRresource * scr_resource, YuvResource * yuv_resource, Position *position)

ShaderYUVtoRGB:Convert YUV resource file to RGBA data in opengl es shader and painted in /dev/fb1. The position of the display can be controlled by the (x,y,w,h) coordinates of the position structure.

Important explanation: This involves texture coordinates, the coordinates of the lower left corner of the (0,0) origin. Therefore, set display range (x, y, w, h) is left the lower corner is the coordinate origin. w means wide, h means high.