Intro

How Chapter 2 works?

1. Init()
   1. SDL_Init()
   2. SDL_CreateWindow()
   3. SDL_GetWindowSurface()
2. loadMedia()
   1. SDL_LoadBMP()
3. copy image(Blit) into surface with SDL_BlitSurface().
4. update window with SDL_UpdateWindowSurface() to refresh and show what we’ve done.
   • you can delay loop( for window lasting) with SDL_Delay().
5. close()
   1. SDL_FreeSurface()
   2. SDL_DestroyWindow()
   3. SDL_Quit()

Function

SDL_LoadBMP()

1

SDL_Surface* SDL_LoadBMP( const char* file );

• param
  • file : the file containing a BMP image
• return
  • surface that contain BMP on success
  • NULL on failure

Gets SDL_Surface object from BMP file and returns its address.

SDL_FreeSurface()

1

void SDL_FreeSurface( SDL_Surface* surface );

• param
  • surface : the SDL_Surface to free
• return is void

free surface object on memory.

SDL_BlitSurface()

1

int SDL_BlitSurface( SDL_Surface* src, const SDL_Rect* srcrect, SDL_Surface* dst, SDL_Rect* dstrect );

• param
  • src : the SDL_Surface structure to be copied from
  • srcrect : the SDL_Rect structure representing the rectangle to be copied, or NULL to copy the entire surface
  • dst : the SDL_Surface structure that is the blit target
  • dstrect : the SDL_Rect structure representing the rectangle that is copied into
• return
  • 0 on blit success
  • negative integer as error code on failure

Blit image into surface’s rect area or entire surface.

Struct

• nothing new

Term

• nothing new