How to access the pixels of a surface using SDL?
*/ SDL_memset (surface->pixels, 0, surface->h * surface->pitch); SDL_UnlockSurface (surface); } With most surfaces you can access the pixels directly.
What is SDL_setcliprect used for?
an SDL_Rect structure used to clip blits to the surface which can be set by SDL_SetClipRect () (read-only) /* This is meant to show how to edit a surface’s pixels on the CPU, but normally you should use SDL_FillRect () to wipe a surface’s contents. */ void WipeSurface (SDL_Surface *surface) { /* This is fast for surfaces that don’t require locking.
How do I allocate a new RGB surface in SDL?
Allocate a new RGB surface. Returns the new SDL_Surface structure that is created or NULL if it fails; call SDL_GetError () for more information. If depth is 4 or 8 bits, an empty palette is allocated for the surface. If depth is greater than 8 bits, the pixel format is set using the [RGBA]mask parameters.
What happens if SDL_surface fails?
Returns the new SDL_Surface structure that is created or NULL if it fails; call SDL_GetError () for more information. If depth is 4 or 8 bits, an empty palette is allocated for the surface. If depth is greater than 8 bits, the pixel format is set using the [RGBA]mask parameters.
How do I get the resolution of the display in SDL2?
In SDL2, use SDL_GetCurrentDisplayMode or SDL_GetDesktopDisplayMode depending on your needs. Usage example: On high-DPI displays this will return the virtual resolution, not the physical resolution. There’s a difference between [ SDL_GetDesktopDisplayMode ()] and SDL_GetCurrentDisplayMode () when SDL runs fullscreen and has changed the resolution.
Does [ SDL_getdesktopdisplaymode () ] return the current or previous display mode?
In that case [ SDL_GetDesktopDisplayMode ()] will return the previous native display mode, and not the current display mode. Show activity on this post.