SDL_RendererLogicalPresentation.3type - Man Page

#include <SDL3/SDL_render.h>

typedef enum SDL_RendererLogicalPresentation
{
    SDL_LOGICAL_PRESENTATION_DISABLED,  /**< There is no logical size in effect */
    SDL_LOGICAL_PRESENTATION_STRETCH,   /**< The rendered content is stretched to the output resolution */
    SDL_LOGICAL_PRESENTATION_LETTERBOX, /**< The rendered content is fit to the largest dimension and the other dimension is letterboxed with black bars */
    SDL_LOGICAL_PRESENTATION_OVERSCAN,  /**< The rendered content is fit to the smallest dimension and the other dimension extends beyond the output bounds */
    SDL_LOGICAL_PRESENTATION_INTEGER_SCALE   /**< The rendered content is scaled up by integer multiples to fit the output resolution */
} SDL_RendererLogicalPresentation;

This enum is available since SDL 3.2.0.