Is it able to texture a small rect inside a big rect?big rect vertices & small rect position and size are given

[gpu22]

is it able to texture a small rect inside a big rect?big rect vertices & small rect position and size are given.
eg. the big rect was drawn as usual, is it able to only texture the topLeft subregion rect in it & only 1 vertex of this small rect is given which is same as topLeft point of the big rect & the size is given too.
Thanks!

[Veryzon]

What are these rectangles? Texture regions? Framebuffer/canvas areas?

[gpu22]

@gpu22

the big rect is draw with its four vertices; however, the small rect inside the big rect only have 1 vetext known as the corner point of the big rect & the size of the small rect is known. Now just want to sample the texture for the small rect.

the big rect is draw with its four vertices; however, the small rect inside the big rect only have 1 vetext known as the corner point of the big rect & the size of the small rect is known. Now just want to sample the texture for the small rect.