當前位置：首頁 > 编程资源 > 编程问答 >内容正文

编程问答

使用SDL打造游戏世界之入门篇 - 6

發布時間：2025/3/20 编程问答 23 豆豆

生活随笔收集整理的這篇文章主要介紹了使用SDL打造游戏世界之入门篇 - 6 小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

本例中的源代碼如下：

#include <stdio.h>
#include <stdlib.h>
#include "SDL.h"

void Slock(SDL_Surface *screen)
{
if ( SDL_MUSTLOCK(screen) )
{
if ( SDL_LockSurface(screen) < 0 )
{
return;
}
}
}
void Sulock(SDL_Surface *screen)
{
if ( SDL_MUSTLOCK(screen) )
{
SDL_UnlockSurface(screen);
}
}
void DrawPixel(SDL_Surface *screen, int x, int y,
Uint8 R, Uint8 G, Uint8 B)
{
Uint32 color = SDL_MapRGB(screen->format, R, G, B);
switch (screen->format->BytesPerPixel)
{
case 1: // Assuming 8-bpp
{
Uint8 *bufp;
bufp = (Uint8 *)screen->pixels + y*screen->pitch + x;
*bufp = color;
}
break;
case 2: // Probably 15-bpp or 16-bpp
{
Uint16 *bufp;
bufp = (Uint16 *)screen->pixels + y*screen->pitch/2 + x;
*bufp = color;
}
break;
case 3: // Slow 24-bpp mode, usually not used
{
Uint8 *bufp;
bufp = (Uint8 *)screen->pixels + y*screen->pitch + x * 3;
if(SDL_BYTEORDER == SDL_LIL_ENDIAN)
{
bufp[0] = color;
bufp[1] = color >> 8;
bufp[2] = color >> 16;
} else {
bufp[2] = color;
bufp[1] = color >> 8;
bufp[0] = color >> 16;
}
}
break;
case 4: // Probably 32-bpp
{
Uint32 *bufp;
bufp = (Uint32 *)screen->pixels + y*screen->pitch/4 + x;
*bufp = color;
}
break;
}
}
void DrawScene(SDL_Surface *screen)
{
Slock(screen);
for(int x=0;x<640;x++)
{
for(int y=0;y<480;y++)
{
DrawPixel(screen, x,y,y/2,y/2,x/3);
}
}
Sulock(screen);
SDL_Flip(screen);
}

int main(int argc, char *argv[])
{
if ( SDL_Init(SDL_INIT_AUDIO|SDL_INIT_VIDEO) < 0 )
{
printf("Unable to init SDL: %s"n", SDL_GetError());
exit(1);
}
atexit(SDL_Quit);
SDL_Surface *screen;
screen=SDL_SetVideoMode(640,480,32,SDL_HWSURFACE|SDL_DOUBLEBUF);
if ( screen == NULL )
{
printf("Unable to set 640x480 video: %s"n", SDL_GetError());
exit(1);
}
int done=0;
while(done == 0)
{
SDL_Event event;
while ( SDL_PollEvent(&event) )
{
if ( event.type == SDL_QUIT ) { done = 1; }
if ( event.type == SDL_KEYDOWN )
{
if ( event.key.keysym.sym == SDLK_ESCAPE ) { done = 1; }
}
}
DrawScene(screen);
}
return 0;
}

程序運行結果如下：

更多內容請看游戲開發、網絡游戲攻略、Solaris基礎知識入門專題，或進入討論組討論。

轉載于:https://www.cnblogs.com/Henrya2/archive/2009/03/24/1420868.html

總結

以上是生活随笔為你收集整理的使用SDL打造游戏世界之入门篇 - 6的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。