The rendering context.
The targeted texture, which must be created with the SDL_TEXTUREACCESS_TARGET flag, or null to render to the window instead of a texture.
true on success or false on failure; call SDL_GetError for more information.
Threadsafety: This function should only be called on the main thread.
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Set a texture as the current rendering target.
The default render target is the window for which the renderer was created. To stop rendering to a texture and render to the window again, call this function with a null texture.