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抠图划线
在贪吃蛇的代码中，我们在定时器中将pa函数注释掉，可以解决其不动的问题，我们用此背景可以进行画图，我们首先可以画一条直线，此时我们不能用HDC去画，应该创建一个临时的HDC和位图，进行画，之后将临时的加载到原HDC中，因为如果不创建临时的，在画完起点后就被release掉了，最后结果就是终点和（0,0）的直线（默认0，0）
1 #include<Windows.h> 2 #include "resource.h" 3 #include <time.h> 4 typedef char boolean; 5 #define TRUE 1 6 #define FALSE 0 7 8 9 10 11 LRESULT CALLBACK MyWndProc(HWND, UINT, WPARAM, LPARAM); 12 13 typedef struct E{ 14 int h,l; 15 struct E *pnext; 16 struct E *plast; 17 }Apple,Snake,node; 18 19 Apple apple={5,6}; 20 Snake *top=NULL; 21 Snake *end=NULL; 22 23 24 25 26 27 HBITMAP h_back; 28 HBITMAP h_apple; 29 HBITMAP h_body; 30 HBITMAP h_l; 31 HBITMAP h_r; 32 HBITMAP h_u; 33 HBITMAP h_d; 34 int g_fx=1; 35 void add(int h,int l); 36 void initSnake(); 37 void show(HDC hdc); 38 void showApple(HDC hdc); 39 void showSnake(HDC hdc); 40 41 void pa(); 42 boolean iseat(); 43 void Newapple(); 44 boolean isziyao(); 45 boolean iszhuang(); 46 47 48 49 50 51 52 int WINAPI WinMain(HINSTANCE hlnstance,HINSTANCE hPrelnstance, 53 LPSTR lpCmdLine,int nCmdShow){ //callback 54 55 56 //设计 57 HWND hwnd; 58 MSG msg; 59 LPCSTR classname="牟柏旭"; 60 WNDCLASSEX ex; 61 62 ex.style=CS_HREDRAW | CS_VREDRAW; 63 ex.cbSize=sizeof(WNDCLASSEX); 64 ex.cbClsExtra=0; 65 ex.cbWndExtra=0; 66 ex.hbrBackground=CreateSolidBrush(RGB(171,171,226)); 67 ex.hCursor=NULL; 68 ex.hIcon=NULL; 69 ex.hIconSm=NULL; 70 ex.hInstance=hlnstance; 71 ex.lpszMenuName=0; 72 ex.lpszClassName=classname; 73 ex.lpfnWndProc=MyWndProc; //消息过程函数 消息回调函数 74 75 //注册 76 RegisterClassEx(&ex); 77 //创建 78 hwnd= CreateWindow(classname,"mubaixu",WS_OVERLAPPEDWINDOW,50,50,620,630,NULL,NULL, 79 hlnstance,NULL); 80 SetTimer (hwnd, 1, 500, NULL) ; 81 82 //最后一个为是否创建多文档，比如code可以打开多个程序 83 84 85 ShowWindow(hwnd,nCmdShow); 86 87 88 89 h_back=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP1)); 90 h_apple=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP2)); 91 h_body=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP3)); 92 h_l=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP6)); 93 h_r=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP4)); 94 h_u=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP5)); 95 h_d=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP7)); 96 initSnake(); 97 srand((unsigned int )time(0)); 98 while(GetMessage(&msg,NULL,0,0)){ 99 100 TranslateMessage(&msg);101 102 DispatchMessage(&msg);103 //调用MyWndProc，系统调用104 105 //指定接收哪个窗口的消息，如果为NULL用于接收所有窗口106 // 后两个为过滤107 }108 109 110 111 return 0;112 } 113 114 int xx=200;115 HDC tmp_dc;116 HBITMAP tmp_bitmap;117 LRESULT CALLBACK MyWndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam){118 int x,y;119 120 121 // char tx[10];122 //char ty[10];123 HDC hdc;124 //temp_hdc;125 //HBRUSH newbrush;126 //HBRUSH oldbrush;127 PAINTSTRUCT ps;128 129 // HBITMAP hbitmap ;130 131 switch (Msg)132 {133 134 case WM_KEYDOWN:135 switch (wParam)136 {137 case VK_UP:138 g_fx=1;139 break;140 case VK_DOWN:141 g_fx=3;142 break;143 case VK_RIGHT:144 g_fx=0;145 break;146 case VK_LEFT:147 g_fx=2;148 break;149 150 default:151 break;152 }153 break;154 155 /*case WM_MOUSEMOVE:156 hdc = GetDC (hWnd) ;157 158 x = LOWORD (lParam) ;159 y = HIWORD (lParam) ;160 161 LineTo (tmp_dc, x, y) ;162 BitBlt(hdc,0,0,620,630,tmp_dc,0,0,SRCCOPY);163 ReleaseDC (hWnd, hdc) ;164 165 break;*/166 case WM_LBUTTONDOWN:167 168 169 hdc = GetDC (hWnd) ;170 171 172 // Rectangle(hdc, 150,150,200,200);173 174 //创建临时的hdc和位图，并且把原图传过去175 tmp_dc=CreateCompatibleDC(hdc);176 tmp_bitmap=CreateCompatibleBitmap(hdc,620,630);177 SelectObject(tmp_dc,tmp_bitmap);178 BitBlt(tmp_dc,0,0,620,630,hdc,0,0,SRCCOPY);179 180 x = LOWORD (lParam) ;181 y = HIWORD (lParam) ;182 //MessageBox (hWnd,itoa(x,tx,10),itoa(y,ty,10),MB_OKCANCEL);*/183 184 MoveToEx (tmp_dc, x, y, NULL) ;185 186 187 ReleaseDC (hWnd, hdc) ;188 break;189 190 case WM_LBUTTONUP:191 hdc = GetDC (hWnd) ;192 193 x = LOWORD (lParam) ;194 y = HIWORD (lParam) ;195 196 LineTo (tmp_dc, x, y) ;197 BitBlt(hdc,0,0,620,630,tmp_dc,0,0,SRCCOPY);198 199 DeleteObject(tmp_dc);200 DeleteObject(tmp_bitmap);201 ReleaseDC (hWnd, hdc) ;202 203 break;204 case WM_CLOSE:205 PostQuitMessage(0);206 207 break;208 209 case WM_PAINT:210 hdc = BeginPaint (hWnd, &ps) ;211 212 show(hdc);213 214 //Rectangle(hdc, 50,50,100,100);215 //hbitmap = CreateCompatibleBitmap (hdc, 100, 200) ;216 //temp_hdc = CreateCompatibleDC (hdc) ;217 //SelectObject(temp_hdc,h_back); 218 ////Rectangle(temp_hdc, 10,10,50,50);219 220 //BitBlt (hdc, 0,0, 600, 600, temp_hdc, 0, 0, SRCCOPY) ;221 222 //xx+=20;223 //Ellipse( hdc, xx, 300, xx+70, 340);224 225 EndPaint (hWnd, &ps) ;226 break;227 228 case WM_TIMER:229 230 231 232 //pa();233 if(iseat()){234 Newapple();235 add(-20,-20);236 }237 if(isziyao()||iszhuang()){238 PostQuitMessage(0);239 }240 241 hdc = GetDC (hWnd) ;242 //show(hdc);重绘243 /*newbrush= CreateSolidBrush(RGB(171,171,226));//椭圆更新移动244 oldbrush=(HBRUSH)SelectObject(hdc,newbrush);245 Rectangle( hdc, 0, 0,600,600);246 247 DeleteObject(newbrush);248 SelectObject(hdc,oldbrush);249 xx+=20;250 Ellipse( hdc, xx, 300, xx+70, 340);251 Rectangle(hdc, 50,50,100,100);*/252 ReleaseDC (hWnd, hdc) ;253 break;254 default:255 break;256 }257 //系统默认的消息处理函数258 return DefWindowProc(hWnd,Msg,wParam,lParam);259 }260 261 262 263 void add(int h,int l){264 node * pnode=(node *)malloc(sizeof(node));265 pnode->h=h;266 pnode->l=l;267 pnode->plast=NULL;268 pnode->pnext=NULL;269 if(top==NULL){270 top=pnode;271 }272 else{273 pnode->plast=end;274 end->pnext=pnode;275 }276 277 end=pnode;278 }279 280 281 void initSnake(){282 int i;283 for( i=8;i<=10;i++){284 add(i,10);285 }286 287 }288 289 void show(HDC hdc){290 HDC temp_hdc;291 temp_hdc = CreateCompatibleDC (hdc) ;292 SelectObject(temp_hdc,h_back); 293 294 BitBlt (hdc, 0,0, 600, 600, temp_hdc, 0, 0, SRCCOPY) ;295 DeleteObject(temp_hdc);296 showApple( hdc);297 showSnake( hdc);298 }299 void showApple(HDC hdc){300 HDC temp_hdc;301 temp_hdc = CreateCompatibleDC (hdc) ;302 SelectObject(temp_hdc,h_apple); 303 304 BitBlt (hdc, apple.l*30+30,apple.h*30+30, 30, 30, temp_hdc, 0, 0, SRCCOPY) ;305 DeleteObject(temp_hdc);306 }307 void showSnake(HDC hdc){308 HDC temp_hdc;309 Snake *ptop=top;310 temp_hdc = CreateCompatibleDC (hdc) ;311 switch (g_fx)312 {313 314 case 0:315 SelectObject(temp_hdc,h_r); 316 break;317 case 1:318 SelectObject(temp_hdc,h_u); 319 break;320 case 2:321 SelectObject(temp_hdc,h_l); 322 break;323 case 3:324 SelectObject(temp_hdc,h_d); 325 break;326 default:327 break;328 }329 330 331 BitBlt (hdc, top->l*30+30,top->h*30+30 , 30, 30, temp_hdc, 0, 0, SRCCOPY) ;332 DeleteObject(temp_hdc);333 334 335 temp_hdc = CreateCompatibleDC (hdc) ;336 SelectObject(temp_hdc,h_body); 337 ptop=ptop->pnext;338 while(ptop){339 340 BitBlt (hdc, ptop->l*30+30,ptop->h*30+30 , 30, 30, temp_hdc, 0, 0, SRCCOPY) ;341 ptop=ptop->pnext;342 }343 DeleteObject(temp_hdc);344 345 }346 347 void pa(){348 Snake *jend=end;349 while(jend->plast!=NULL)350 {351 jend->h=jend->plast->h;352 jend->l=jend->plast->l;353 354 jend=jend->plast;355 }356 switch(g_fx)357 {358 case 0:359 top->l++;360 break;361 case 1:362 top->h--;363 break;364 case 2:365 top->l--;366 break;367 case 3:368 top->h++;369 break;370 371 }372 }373 boolean iseat(){374 if(top->h==apple.h &&top->l==apple.l )375 return TRUE;376 return FALSE;377 }378 void Newapple(){379 apple.l=rand()%18;380 apple.h=rand()%18;381 }382 boolean isziyao(){383 Snake *pbody=top->pnext;384 while(pbody!=NULL){385 if(top->h==pbody->h &&top->l==pbody->l )386 return TRUE;387 pbody=pbody->pnext;388 }389 return FALSE;390 }391 boolean iszhuang(){392 if(top->h>17||top->l<0||top->l>17||top->h<0)393 {394 return TRUE;395 }396 return FALSE;397 }
此时如果加上WM_MOUSEMOVE 就会变成了一纸笔
1 case WM_MOUSEMOVE: 2 hdc = GetDC (hWnd) ; 3 4 x = LOWORD (lParam) ; 5 y = HIWORD (lParam) ; 6 7 LineTo (tmp_dc, x, y) ; 8 BitBlt(hdc,0,0,620,630,tmp_dc,0,0,SRCCOPY); 9 10 ReleaseDC (hWnd, hdc) ;11 12 break;
在第一张图中，我们可以多次画很多条线，我们怎么才能在图面上显示一条线？
我们可以再次创建一个src_hdc和map，来存储原来的图片，每次画新的线的时候，我们都将其src给hdc，在通过hdc给tmp_hcd，这样就能保证每次画新的线的时候旧的线就没了
1 case WM_LBUTTONDOWN: 2 3 4 hdc = GetDC (hWnd) ; 5 x = LOWORD (lParam) ; 6 y = HIWORD (lParam) ; 7 if(type==0){ 8 begin_x=x; 9 begin_y=y;10 src_dc=CreateCompatibleDC(hdc);11 src_bitmap=CreateCompatibleBitmap(hdc,620,630);12 SelectObject(src_dc,src_bitmap);13 BitBlt(src_dc,0,0,620,630,hdc,0,0,SRCCOPY);14 type=1;15 }16 17 18 // Rectangle(hdc, 150,150,200,200);19 20 if(1==type){21 //创建临时的hdc和位图，并且把原图传过去22 BitBlt(hdc,0,0,620,630,src_dc,0,0,SRCCOPY);//把原hdc弄干净23 tmp_dc=CreateCompatibleDC(hdc);24 tmp_bitmap=CreateCompatibleBitmap(hdc,620,630);25 SelectObject(tmp_dc,tmp_bitmap);26 BitBlt(tmp_dc,0,0,620,630,hdc,0,0,SRCCOPY);27 28 29 //MessageBox (hWnd,itoa(x,tx,10),itoa(y,ty,10),MB_OKCANCEL);*/30 31 MoveToEx (tmp_dc, x, y, NULL) ;32 33 }34 ReleaseDC (hWnd, hdc) ;35 break;36 37 case WM_LBUTTONUP:38 hdc = GetDC (hWnd) ;39 40 x = LOWORD (lParam) ;41 y = HIWORD (lParam) ;42 43 44 LineTo (tmp_dc, x, y) ;45 BitBlt(hdc,0,0,620,630,tmp_dc,0,0,SRCCOPY);46 47 48 49 DeleteObject(tmp_dc);50 DeleteObject(tmp_bitmap);51 ReleaseDC (hWnd, hdc) ;52 53 break;
加上下面的每次只能画一条随意弯曲的线
1 //case WM_MOUSEMOVE: 2 // hdc = GetDC (hWnd) ; 3 4 // x = LOWORD (lParam) ; 5 // y = HIWORD (lParam) ; 6 7 // LineTo (tmp_dc, x, y) ; 8 // BitBlt(hdc,0,0,620,630,tmp_dc,0,0,SRCCOPY); 9 10 // ReleaseDC (hWnd, hdc) ; 11 12 // break;
我们可以设置begin_x,begin_y来标定我们起始点，之后我们在moucemove里面画4根线
就画出了一个矩形
case WM_MOUSEMOVE: hdc = GetDC (hWnd) ; x = LOWORD (lParam) ; y = HIWORD (lParam) ; BitBlt(tmp_dc,0,0,620,630,src_dc,0,0,SRCCOPY); //1根线 MoveToEx (tmp_dc, begin_x, begin_y, NULL) ; LineTo (tmp_dc,begin_x, y) ; //2根 MoveToEx (tmp_dc, begin_x, begin_y, NULL) ; LineTo (tmp_dc, x, begin_y) ; //3根 MoveToEx (tmp_dc, x, begin_y, NULL) ; LineTo (tmp_dc, x, y) ; //4根 MoveToEx (tmp_dc, begin_x,y, NULL) ; LineTo (tmp_dc, x, y) ; BitBlt(hdc,0,0,620,630,tmp_dc,0,0,SRCCOPY); ReleaseDC (hWnd, hdc) ; break;
下面就是画线不重复的代码
1 #include<Windows.h> 2 #include "resource.h" 3 #include <time.h> 4 typedef char boolean; 5 #define TRUE 1 6 #define FALSE 0 7 8 9 10 11 LRESULT CALLBACK MyWndProc(HWND, UINT, WPARAM, LPARAM); 12 13 typedef struct E{ 14 int h,l; 15 struct E *pnext; 16 struct E *plast; 17 }Apple,Snake,node; 18 19 Apple apple={5,6}; 20 Snake *top=NULL; 21 Snake *end=NULL; 22 23 24 25 26 27 HBITMAP h_back; 28 HBITMAP h_apple; 29 HBITMAP h_body; 30 HBITMAP h_l; 31 HBITMAP h_r; 32 HBITMAP h_u; 33 HBITMAP h_d; 34 int g_fx=1; 35 void add(int h,int l); 36 void initSnake(); 37 void show(HDC hdc); 38 void showApple(HDC hdc); 39 void showSnake(HDC hdc); 40 41 void pa(); 42 boolean iseat(); 43 void Newapple(); 44 boolean isziyao(); 45 boolean iszhuang(); 46 47 48 49 50 51 52 int WINAPI WinMain(HINSTANCE hlnstance,HINSTANCE hPrelnstance, 53 LPSTR lpCmdLine,int nCmdShow){ //callback 54 55 56 //设计 57 HWND hwnd; 58 MSG msg; 59 LPCSTR classname="牟柏旭"; 60 WNDCLASSEX ex; 61 62 ex.style=CS_HREDRAW | CS_VREDRAW; 63 ex.cbSize=sizeof(WNDCLASSEX); 64 ex.cbClsExtra=0; 65 ex.cbWndExtra=0; 66 ex.hbrBackground=CreateSolidBrush(RGB(171,171,226)); 67 ex.hCursor=NULL; 68 ex.hIcon=NULL; 69 ex.hIconSm=NULL; 70 ex.hInstance=hlnstance; 71 ex.lpszMenuName=0; 72 ex.lpszClassName=classname; 73 ex.lpfnWndProc=MyWndProc; //消息过程函数 消息回调函数 74 75 //注册 76 RegisterClassEx(&ex); 77 //创建 78 hwnd= CreateWindow(classname,"mubaixu",WS_OVERLAPPEDWINDOW,50,50,620,630,NULL,NULL, 79 hlnstance,NULL); 80 SetTimer (hwnd, 1, 500, NULL) ; 81 82 //最后一个为是否创建多文档，比如code可以打开多个程序 83 84 85 ShowWindow(hwnd,nCmdShow); 86 87 88 89 h_back=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP1)); 90 h_apple=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP2)); 91 h_body=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP3)); 92 h_l=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP6)); 93 h_r=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP4)); 94 h_u=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP5)); 95 h_d=LoadBitmap(hlnstance,MAKEINTRESOURCE(IDB_BITMAP7)); 96 initSnake(); 97 srand((unsigned int )time(0)); 98 while(GetMessage(&msg,NULL,0,0)){ 99 100 TranslateMessage(&msg);101 102 DispatchMessage(&msg);103 //调用MyWndProc，系统调用104 105 //指定接收哪个窗口的消息，如果为NULL用于接收所有窗口106 // 后两个为过滤107 }108 109 110 111 return 0;112 } 113 114 int xx=200;115 HDC tmp_dc;116 HBITMAP tmp_bitmap;117 HDC src_dc;118 HBITMAP src_bitmap;119 int type=0;120 int begin_x=0;121 int begin_y=0;122 LRESULT CALLBACK MyWndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam){123 int x,y;124 125 126 // char tx[10];127 //char ty[10];128 HDC hdc;129 //temp_hdc;130 //HBRUSH newbrush;131 //HBRUSH oldbrush;132 PAINTSTRUCT ps;133 134 // HBITMAP hbitmap ;135 136 switch (Msg)137 {138 139 case WM_KEYDOWN:140 switch (wParam)141 {142 case VK_UP:143 g_fx=1;144 break;145 case VK_DOWN:146 g_fx=3;147 break;148 case VK_RIGHT:149 g_fx=0;150 break;151 case VK_LEFT:152 g_fx=2;153 break;154 155 default:156 break;157 }158 break;159 160 //case WM_MOUSEMOVE:161 // hdc = GetDC (hWnd) ;162 163 // x = LOWORD (lParam) ;164 // y = HIWORD (lParam) ;165 166 // if(type==1){167 168 // BitBlt(tmp_dc,0,0,620,630,src_dc,0,0,SRCCOPY);169 // //1根线170 // MoveToEx (tmp_dc, begin_x, begin_y, NULL) ;171 // LineTo (tmp_dc,begin_x, y) ;172 173 // //2根174 // MoveToEx (tmp_dc, begin_x, begin_y, NULL) ;175 // LineTo (tmp_dc, x, begin_y) ;176 // //3根177 // MoveToEx (tmp_dc, x, begin_y, NULL) ;178 // LineTo (tmp_dc, x, y) ;179 // //4根180 // MoveToEx (tmp_dc, begin_x,y, NULL) ;181 // LineTo (tmp_dc, x, y) ;182 183 184 // }185 // BitBlt(hdc,0,0,620,630,tmp_dc,0,0,SRCCOPY);186 187 // ReleaseDC (hWnd, hdc) ; 188 189 // break;190 case WM_LBUTTONDOWN:191 192 193 hdc = GetDC (hWnd) ;194 x = LOWORD (lParam) ;195 y = HIWORD (lParam) ;196 if(type==0){197 begin_x=x;198 begin_y=y;199 src_dc=CreateCompatibleDC(hdc);200 src_bitmap=CreateCompatibleBitmap(hdc,620,630);201 SelectObject(src_dc,src_bitmap);202 BitBlt(src_dc,0,0,620,630,hdc,0,0,SRCCOPY);203 204 type=1;205 }206 207 208 // Rectangle(hdc, 150,150,200,200);209 210 if(1==type){211 //创建临时的hdc和位图，并且把原图传过去212 BitBlt(hdc,0,0,620,630,src_dc,0,0,SRCCOPY);//把原hdc弄干净213 tmp_dc=CreateCompatibleDC(hdc);214 tmp_bitmap=CreateCompatibleBitmap(hdc,620,630);215 SelectObject(tmp_dc,tmp_bitmap);216 BitBlt(tmp_dc,0,0,620,630,hdc,0,0,SRCCOPY);217 218 219 //MessageBox (hWnd,itoa(x,tx,10),itoa(y,ty,10),MB_OKCANCEL);*/220 221 MoveToEx (tmp_dc, x, y, NULL) ;222 223 }224 ReleaseDC (hWnd, hdc) ;225 break;226 227 case WM_LBUTTONUP:228 hdc = GetDC (hWnd) ;229 230 x = LOWORD (lParam) ;231 y = HIWORD (lParam) ;232 233 if(type==1){234 //画线结束235 LineTo (tmp_dc, x, y) ;236 BitBlt(hdc,0,0,620,630,tmp_dc,0,0,SRCCOPY);237 DeleteObject(tmp_dc);238 DeleteObject(tmp_bitmap);239 //抠图240 }241 242 ReleaseDC (hWnd, hdc) ;243 244 break;245 case WM_CLOSE:246 PostQuitMessage(0);247 248 break;249 250 case WM_PAINT:251 hdc = BeginPaint (hWnd, &ps) ;252 253 show(hdc);254 255 //Rectangle(hdc, 50,50,100,100);256 //hbitmap = CreateCompatibleBitmap (hdc, 100, 200) ;257 //temp_hdc = CreateCompatibleDC (hdc) ;258 //SelectObject(temp_hdc,h_back); 259 ////Rectangle(temp_hdc, 10,10,50,50);260 261 //BitBlt (hdc, 0,0, 600, 600, temp_hdc, 0, 0, SRCCOPY) ;262 263 //xx+=20;264 //Ellipse( hdc, xx, 300, xx+70, 340);265 266 EndPaint (hWnd, &ps) ;267 break;268 269 case WM_TIMER:270 271 272 273 //pa();274 if(iseat()){275 Newapple();276 add(-20,-20);277 }278 if(isziyao()||iszhuang()){279 PostQuitMessage(0);280 }281 282 hdc = GetDC (hWnd) ;283 //show(hdc);重绘284 /*newbrush= CreateSolidBrush(RGB(171,171,226));//椭圆更新移动285 oldbrush=(HBRUSH)SelectObject(hdc,newbrush);286 Rectangle( hdc, 0, 0,600,600);287 288 DeleteObject(newbrush);289 SelectObject(hdc,oldbrush);290 xx+=20;291 Ellipse( hdc, xx, 300, xx+70, 340);292 Rectangle(hdc, 50,50,100,100);*/293 ReleaseDC (hWnd, hdc) ;294 break;295 default:296 break;297 }298 //系统默认的消息处理函数299 return DefWindowProc(hWnd,Msg,wParam,lParam);300 }301 302 303 304 void add(int h,int l){305 node * pnode=(node *)malloc(sizeof(node));306 pnode->h=h;307 pnode->l=l;308 pnode->plast=NULL;309 pnode->pnext=NULL;310 if(top==NULL){311 top=pnode;312 }313 else{314 pnode->plast=end;315 end->pnext=pnode;316 }317 318 end=pnode;319 }320 321 322 void initSnake(){323 int i;324 for( i=8;i<=10;i++){325 add(i,10);326 }327 328 }329 330 void show(HDC hdc){331 HDC temp_hdc;332 temp_hdc = CreateCompatibleDC (hdc) ;333 SelectObject(temp_hdc,h_back); 334 335 BitBlt (hdc, 0,0, 600, 600, temp_hdc, 0, 0, SRCCOPY) ;336 DeleteObject(temp_hdc);337 showApple( hdc);338 showSnake( hdc);339 }340 void showApple(HDC hdc){341 HDC temp_hdc;342 temp_hdc = CreateCompatibleDC (hdc) ;343 SelectObject(temp_hdc,h_apple); 344 345 BitBlt (hdc, apple.l*30+30,apple.h*30+30, 30, 30, temp_hdc, 0, 0, SRCCOPY) ;346 DeleteObject(temp_hdc);347 }348 void showSnake(HDC hdc){349 HDC temp_hdc;350 Snake *ptop=top;351 temp_hdc = CreateCompatibleDC (hdc) ;352 switch (g_fx)353 {354 355 case 0:356 SelectObject(temp_hdc,h_r); 357 break;358 case 1:359 SelectObject(temp_hdc,h_u); 360 break;361 case 2:362 SelectObject(temp_hdc,h_l); 363 break;364 case 3:365 SelectObject(temp_hdc,h_d); 366 break;367 default:368 break;369 }370 371 372 BitBlt (hdc, top->l*30+30,top->h*30+30 , 30, 30, temp_hdc, 0, 0, SRCCOPY) ;373 DeleteObject(temp_hdc);374 375 376 temp_hdc = CreateCompatibleDC (hdc) ;377 SelectObject(temp_hdc,h_body); 378 ptop=ptop->pnext;379 while(ptop){380 381 BitBlt (hdc, ptop->l*30+30,ptop->h*30+30 , 30, 30, temp_hdc, 0, 0, SRCCOPY) ;382 ptop=ptop->pnext;383 }384 DeleteObject(temp_hdc);385 386 }387 388 void pa(){389 Snake *jend=end;390 while(jend->plast!=NULL)391 {392 jend->h=jend->plast->h;393 jend->l=jend->plast->l;394 395 jend=jend->plast;396 }397 switch(g_fx)398 {399 case 0:400 top->l++;401 break;402 case 1:403 top->h--;404 break;405 case 2:406 top->l--;407 break;408 case 3:409 top->h++;410 break;411 412 }413 }414 boolean iseat(){415 if(top->h==apple.h &&top->l==apple.l )416 return TRUE;417 return FALSE;418 }419 void Newapple(){420 apple.l=rand()%18;421 apple.h=rand()%18;422 }423 boolean isziyao(){424 Snake *pbody=top->pnext;425 while(pbody!=NULL){426 if(top->h==pbody->h &&top->l==pbody->l )427 return TRUE;428 pbody=pbody->pnext;429 }430 return FALSE;431 }432 boolean iszhuang(){433 if(top->h>17||top->l<0||top->l>17||top->h<0)434 {435 return TRUE;436 }437 return FALSE;438 }
抠图划线
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