NAME¶

SDL_BlitSurface9Grid - Perform a scaled blit using the 9-grid algorithm to a destination surface, which may be of a different format.

HEADER FILE¶

Defined in SDL3/SDL_surface.h

SYNOPSIS¶

#include "SDL3/SDL.h"

bool SDL_BlitSurface9Grid(SDL_Surface *src, const SDL_Rect *srcrect, int left_width, int right_width, int top_height, int bottom_height, float scale, SDL_ScaleMode scaleMode, SDL_Surface *dst, const SDL_Rect *dstrect);

DESCRIPTION¶

The pixels in the source surface are split into a 3x3 grid, using the different corner sizes for each corner, and the sides and center making up the remaining pixels. The corners are then scaled using scale and fit into the corners of the destination rectangle. The sides and center are then stretched into place to cover the remaining destination rectangle.

FUNCTION PARAMETERS¶

src

the SDL_Surface
structure to be copied from.

srcrect

the SDL_Rect
structure representing the rectangle to be used for the 9-grid, or NULL to use the entire surface.

left_width

the width, in pixels, of the left corners in srcrect .

right_width

the width, in pixels, of the right corners in srcrect .

top_height

the height, in pixels, of the top corners in srcrect .

bottom_height

the height, in pixels, of the bottom corners in srcrect .

scale

the scale used to transform the corner of srcrect into the corner of dstrect , or 0.0f for an unscaled blit.

scaleMode

scale algorithm to be used.

dst

the SDL_Surface
structure that is the blit target.

dstrect

the SDL_Rect
structure representing the target rectangle in the destination surface, or NULL to fill the entire surface.

RETURN VALUE¶

Returns true on success or false on failure; call

SDL_GetError () for more information.

THREAD SAFETY¶

The same destination surface should not be used from two threads at once. It is safe to use the same source surface from multiple threads.

AVAILABILITY¶

This function is available since SDL 3.1.3.

SEE ALSO¶

•(3), SDL_BlitSurface(3)