SDL3/SDL_CreateColorCursor

SDL_Cursor * SDL_CreateColorCursor(SDL_Surface *surface,
                              int hot_x,
                              int hot_y);

Function Parameters

Return Value

(SDL_Cursor *) Returns the new cursor on success or NULL on failure; call SDL_GetError() for more information.

Remarks

If this function is passed a surface with alternate representations, the surface will be interpreted as the content to be used for 100% display scale, and the alternate representations will be used for high DPI situations. For example, if the original surface is 32x32, then on a 2x macOS display or 200% display scale on Windows, a 64x64 version of the image will be used, if available. If a matching version of the image isn't available, the closest larger size image will be downscaled to the appropriate size and be used instead, if available. Otherwise, the closest smaller image will be upscaled and be used instead.

Thread Safety

Version

Code Examples

#include <SDL3/SDL.h>

int
main(int argc, char *argv[])
{
    SDL_Window *window = NULL;
    SDL_Renderer *renderer = NULL;
    SDL_Surface *surface = NULL;
    SDL_Cursor *cursor = NULL;
    bool error = true;

    if (!SDL_Init(SDL_INIT_VIDEO)) {
        goto exit;
    }
    if (!SDL_CreateWindowAndRenderer("Hello SDL", 640, 480, 0, &window, &renderer)) {
        goto exit;
    }
    surface = SDL_LoadBMP((1 < argc) ? argv[1] : "cursor.bmp");
    if (!surface) {
        goto exit;
    }
    cursor = SDL_CreateColorCursor(surface, 0, 0);
    if (!cursor) {
        goto exit;
    }

    SDL_SetCursor(cursor);
    SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
    while (true) {
        SDL_Event event;
        while (SDL_PollEvent(&event)) {
            switch (event.type) {
            case SDL_EVENT_MOUSE_BUTTON_UP:
            case SDL_EVENT_QUIT:
                error = false;
                goto exit;
            }
        }
        SDL_RenderClear(renderer);
        SDL_RenderPresent(renderer);
    }

exit:
    if (error) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "%s", SDL_GetError());
    }
    if (cursor) {
        SDL_DestroyCursor(cursor);
    }
    if (surface) {
        SDL_DestroySurface(surface);
    }
    if (renderer) {
        SDL_DestroyRenderer(renderer);
    }
    if (window) {
        SDL_DestroyWindow(window);
    }
    SDL_Quit();
    return error;
}

SDL_Surface *	surface	an SDL_Surface structure representing the cursor image.
int	hot_x	the x position of the cursor hot spot.
int	hot_y	the y position of the cursor hot spot.

SDL_CreateColorCursor

Header File

Syntax