The renderer which should copy parts of a texture.
The source texture.
A pointer to the source rectangle, or null for the entire texture.
A pointer to a point indicating where the top-left corner of srcrect should be mapped to, or null for the rendering target's origin.
A pointer to a point indicating where the top-right corner of srcrect should be mapped to, or null for the rendering target's top-right corner.
A pointer to a point indicating where the bottom-left corner of srcrect should be mapped to, or null for the rendering target's bottom-left corner.
true on success or false on failure; call SDL_GetError for more information.
Threadsafety: You may only call this function from the main thread.
Copy a portion of the source texture to the current rendering target, with affine transform, at subpixel precision.