return SDL_UpdateTextureNative(texture, rect, pixels, pitch); } else { renderer = texture->renderer; return renderer->UpdateTexture(renderer, texture, rect, pixels, pitch); } } 从源码中能够看出,SDL_UpdateTexture()的大致流程例如以下。 1.检查输入參数的合理性。比如像素格式是否支持,宽和高是否小...
SDL_UpdateTexture(texture, NULL, video_buf, video_width); // 设置显示区域 rect.x = 0; // 区域左上角x坐标 rect.y = 0; // 区域左上角y坐标 float w_ratio = win_width * 1.0 /video_width; // 宽度比例 float h_ratio = win_height * 1.0 /video_height; // 高度比例 // 计算显示区...
int SDLCALL SDL_UpdateTexture(SDL_Texture * texture, const SDL_Rect * rect, const void *pixels, int pitch); 参数的含义如下: texture:目标纹理。rect:更新像素的矩形区域。设置为NULL的时候更新整个区域。pixels:像素数据。 pitch:一行像素数据的字节数。成功的话返回0,失败的话返回-1。 SDL_UpdateTexture...
Uint32lastTick,curTick;inttick_interval=40;inttime_slice=1;inttime_left;intcount;structhz_info{ unsignedcharword[2];unsignedcharcode[4];intindex;intx,y;inttime;intkill;SDL_Surface*Sprite;SDL_RectSrcMap;SDL_RectDesMap;}hz[4];/*---*/ intmain()
SDL_UpdateRect(screen,x,y,1,1); } int main(){ SDL_Surface *screen; Uint32 color; if(SDL_Init(SDL_INIT_VIDEO) < 0){ fprintf(stderr,"can not init SDL: %s\n",SDL_GetError()); exit(1); } screen = SDL_SetVideoMode(640,480,16,SDL_SWSURFACE); /* 640*480*16 */ ...
SDL_UpdateRect(screen, 0, 0, 640, 480); } // Entry point int main(int argc, char *argv[]) { // 初始化SDL子系统,这里只对视频进行初始化 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError()); ...
SDL_UpdateRect(Screen, 0, 0, screen.w, screen.h);end;procedure SwitchFullscreen;begin fullscreen := 1 - fullscreen; if fullscreen = 0 then begin Screen := SDL_SetVideoMode(RESOLUTIONX, RESOLUTIONY, 32, ScreenFlag); end else begin Screen := SDL_SetVideoMode(Center_X * 2, Center_...
SDL_UpdateRect(screen, 0, 0, image->w, image->h); printf("Pressany key to continue..."); getchar(); SDL_FreeSurface(image); SDL_FreeSurface(screen); SDL_Quit(); return 0; } 2、Ubuntu下编译 $ gcc show_bmp_file.c -o pc //pc是测试程序名字 有错误...
//UpdateUint32 delay = 10; /* To round it down to the nearest 10 ms */void * my_callback_param;SDL_TimerID my_timer_id = SDL_AddTimer(delay, Update, my_callback_param);char frm[10];SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 80, 80, 80)); SDL_Texture* tTex[3...
如果硬件不支持双缓冲,那么等同于调用SDL_UpdateRect(screen, 0, 0, 0, 0),即对整个screen的绘制区域进行刷新。 voi 35、d 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...