This document is not done. On Going!!

Intro

How Chapter 7 works?

1. init()
   1. SDL_Init()
   2. SDL_SetHint()
   3. SDL_CreateWindow()
   4. SDL_CreateRenderer()
   5. SDL_SetRenderDrawColor()
   6. IMG_Init()
2. loadMedia()
   1. loadTexture()
      1. load PNG file on intermediate surface with IMG_Load().
      2. create texture from loaded surface with SDL_CreateTextureFromSurface().
         • free memory of intermediate surface with SDL_FreeSurface().
3. start loop untill variable quit is true.
   1. start loop that calls SDL_PollEvent() untill it returns 0.
      1. if SDL_Event.type is SDL_QUIT, quit is true( which means first loop will end).
      2. clear screen(render) with SDL_RenderClear().
      3. render texture(copy) on screen with SDL_RenderCopy().
      4. update screen(of window) with SDL_RenderPresent() to refresh and show what we’ve done.
4. close()
   1. SDL_DestroyTexture()
   2. SDL_DestroyRenderer()
   3. SDL_DestroyWindow()
   4. IMG_Quit()
   5. SDL_Quit()

• now we are not using screen surface as our primary canvas anymore; instead renderer!
  • loadSueface() -> loadTexture()
  • SDL_GetWindowSurface() is gone from init()
    • instead, SDL_SetHint(), SDL_CreateRenderer() and SDL_SetRenderDrawColor() are required
  • SDL_BlitSurface() is replaced into SDL_RenderClear() and SDL_RenderCopy()
  • SDL_UpdateWindowSurface() is replaced into SDL_RenderPresent()
  • SDL_FreeSurface() is gone from close()
    • instead, SDL_DestroyTexture() and SDL_DestroyRenderer() are required

Function

SDL_SetHint()

1

• param
  • `` :
• return
  • **** on

SDL_CreateRenderer()

1

• param
  • `` :
• return
  • **** on

SDL_SetRenderDrawColor()

1

• param
  • `` :
• return
  • **** on

SDL_CreateTextureFromSurface()

1

• param
  • `` :
• return
  • **** on

SDL_RenderClear()

1

• param
  • `` :
• return
  • **** on

SDL_RenderCopy()

1

• param
  • `` :
• return
  • **** on

SDL_RenderPresent()

1

• param
  • `` :
• return
  • **** on

SDL_DestroyTexture()

1

• param
  • `` :
• return
  • **** on

SDL_DestroyRender()

1

• param
  • `` :
• return
  • **** on

Struct

SDL_Renderer

SDL_Texture

Term

SDL_SetHint()

• SDL_HINT_RENDER_SCALE_QUALITY

SDL_CreateRender()

• SDL_RENDERER_ACCELERATED