📄 demo2_1.c
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1 /****************************************************************/
2 /* Demo2_1 --- The Use of GetDeviceCaps */
3 /****************************************************************/
4
5 #include <windows.h>
6 #include "demo2_1.h"
7
8 int PASCAL WinMain(HANDLE, HANDLE, LPSTR, int);
9 long FAR PASCAL MainWndProc(HWND, unsigned, WORD, LONG);
10
11 void ShowDevCaps(HDC, HDC);
12 HDC CreateIC_Printer();
13
14 int CharX, CharY;
15 int OY = 0;
16
17
18 /****************************************************************/
19 /* WinMain() */
20 /****************************************************************/
21
22 int PASCAL WinMain(HANDLE hInstance, HANDLE hPrevInstance,
23 LPSTR lpszCmdLine, int nCmdShow)
24 {
25 WNDCLASS wclass;
26 MSG msg;
27 HWND hWnd;
28 char szName[] = "Demo2_1";
29
30 if (!hPrevInstance)
31 {
32 wclass.style = CS_VREDRAW;
33 wclass.lpfnWndProc = MainWndProc;
34 wclass.cbClsExtra = 0;
35 wclass.cbWndExtra = 0;
36 wclass.hInstance = hInstance;
37 wclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
38 wclass.hCursor = LoadCursor(NULL, IDC_ARROW);
39 wclass.hbrBackground = GetStockObject(WHITE_BRUSH);
40 wclass.lpszMenuName = szName;
41 wclass.lpszClassName = szName;
42
43 if (!RegisterClass (&wclass))
44 return (FALSE);
45 }
46
47 hWnd = CreateWindow(
48 szName,
49 "The GetDeviceCaps" ,
50 WS_OVERLAPPEDWINDOW | WS_VSCROLL,
51 CW_USEDEFAULT,
52 CW_USEDEFAULT,
53 CW_USEDEFAULT,
54 CW_USEDEFAULT,
55 NULL,
56 NULL,
57 hInstance,
58 NULL );
59
60 if (!hWnd)
61 return (FALSE);
62
63 ShowWindow(hWnd, nCmdShow);
64 UpdateWindow(hWnd);
65
66 while (GetMessage(&msg, NULL, NULL,NULL))
67 {
68 TranslateMessage(&msg);
69 DispatchMessage(&msg);
70 }
71 return (msg.wParam);
72 }
73
74
75
76 /****************************************************************/
77 /* MainWndProc() */
78 /****************************************************************/
79
80 long FAR PASCAL MainWndProc(HWND hWnd, unsigned message,
81 WORD wParam, LONG lParam)
82 {
83 HDC hDC, hInfoDC;
84 HMENU hMenu;
85 PAINTSTRUCT ps;
86 TEXTMETRIC tm;
87 HFONT hFont;
88 int Temp;
89 static int DeviceID = IDM_SCREEN;
90 static int MaxLine;
91 static int CY;
92
93 switch (message)
94 {
95 case WM_CREATE :
96 hMenu = GetMenu(hWnd);
97 CheckMenuItem(hMenu, IDM_SCREEN, MF_CHECKED);
98
99 hDC = GetDC(hWnd);
100
101 hFont = GetStockObject(SYSTEM_FIXED_FONT);
102 SelectObject(hDC, hFont);
103
104 GetTextMetrics(hDC, &tm);
105 CharX = tm.tmAveCharWidth;
106 CharY = tm.tmHeight + tm.tmExternalLeading;
107
108 ReleaseDC(hWnd, hDC);
109
110 MaxLine = GetMaxLine();
111 break;
112
113 case WM_COMMAND :
114 switch(wParam)
115 {
116 case IDM_SCREEN :
117 if (DeviceID != IDM_SCREEN)
118 {
119 hMenu = GetMenu(hWnd);
120 CheckMenuItem(hMenu, DeviceID,
121 MF_UNCHECKED);
122 DeviceID = IDM_SCREEN;
123 CheckMenuItem(hMenu, DeviceID,
124 MF_CHECKED);
125 InvalidateRect(hWnd, NULL, TRUE);
126 }
127 break;
128
129 case IDM_PRINTER :
130 if (DeviceID != IDM_PRINTER)
131 {
132 hMenu = GetMenu(hWnd);
133 CheckMenuItem(hMenu, DeviceID,
134 MF_UNCHECKED);
135 DeviceID = IDM_PRINTER;
136 CheckMenuItem(hMenu, DeviceID,
137 MF_CHECKED);
138 InvalidateRect(hWnd, NULL, TRUE);
139 }
140 break;
141 }
142 break;
143
144 case WM_DEVMODECHANGE :
145 InvalidateRect(hWnd, NULL, TRUE);
146 break;
147
148 case WM_PAINT :
149 hDC = BeginPaint(hWnd, &ps);
150
151 if (DeviceID == IDM_SCREEN)
152 { hInfoDC = CreateIC("DISPLAY", NULL, NULL, NULL);
153 if (hInfoDC)
154 { ShowDevCaps(hDC, hInfoDC);
155 DeleteDC(hInfoDC);
156 }
157 }
158 else
159 { hInfoDC = CreateIC_Printer();
160 if (hInfoDC)
161 { ShowDevCaps(hDC, hInfoDC);
162 DeleteDC(hInfoDC);
163 }
164 }
165 EndPaint(hWnd, &ps);
166 break;
167
168 case WM_SIZE :
169
170 CY = HIWORD(lParam) / CharY;
171 SetScrollRange(hWnd, SB_VERT,
172 0, MaxLine-CY, TRUE);
173 OY = min(OY, MaxLine-CY);
174 SetScrollPos(hWnd, SB_VERT, OY, TRUE);
175 break;
176
177 case WM_KEYDOWN :
178 switch (wParam)
179 {
180 case VK_HOME :
181 SendMessage(hWnd, WM_VSCROLL,
182 SB_TOP, 0L);
183 break;
184
185 case VK_END :
186 SendMessage(hWnd, WM_VSCROLL,
187 SB_BOTTOM, 0L);
188 break;
189
190 case VK_PRIOR :
191 SendMessage(hWnd, WM_VSCROLL,
192 SB_PAGEUP, 0L);
193 break;
194
195 case VK_NEXT :
196 SendMessage(hWnd, WM_VSCROLL,
197 SB_PAGEDOWN, 0L);
198 break;
199
200 case VK_UP :
201 SendMessage(hWnd, WM_VSCROLL,
202 SB_LINEUP, 0L);
203 break;
204
205 case VK_DOWN :
206 SendMessage(hWnd, WM_VSCROLL,
207 SB_LINEDOWN, 0L);
208 break;
209 }
210 break;
211
212 case WM_VSCROLL :
213 switch (wParam)
214 {
215 case SB_TOP :
216 Temp = 0;
217 break;
218
219 case SB_BOTTOM :
220 Temp = MaxLine - CY;
221 break;
222
223 case SB_LINEUP :
224 Temp = OY - 1;
225 break;
226
227 case SB_PAGEUP :
228 Temp = OY - CY;
229 break;
230
231 case SB_LINEDOWN :
232 Temp = OY + 1;
233 break;
234
235 case SB_PAGEDOWN :
236 Temp = OY + CY;
237 break;
238
239 case SB_THUMBPOSITION :
240 Temp = LOWORD(lParam);
241 break;
242
243 default :
244 return (NULL);
245 }
246
247 Temp = min(max(0, Temp), MaxLine-CY);
248 if (Temp == OY) break;
249
250 OY = Temp;
251 SetScrollPos(hWnd, SB_VERT, OY, TRUE);
252 InvalidateRect(hWnd, NULL, TRUE);
253 break;
254
255 case WM_DESTROY :
256 PostQuitMessage(0);
257 break ;
258
259 default :
260 return (DefWindowProc(hWnd, message, wParam, lParam));
261 }
262 return (NULL);
263 }
264
265
266 HDC CreateIC_Printer()
267 {
268 HDC hInfoDC;
269 char szProfile[70];
270 char *szDriver, *szDevice, *szOutput;
271
272 GetProfileString("windows", "device", "", szProfile, 70);
273
274 szDevice = (char *) strtok(szProfile, ",");
275 szDriver = (char *) strtok(NULL, ",");
276 szOutput = (char *) strtok(NULL, ",");
277
278 if (szDevice && szDriver && szOutput)
279 {
280 hInfoDC = CreateIC(szDriver, szDevice, szOutput, NULL);
281 return (hInfoDC);
282 }
283
284 return (NULL);
285 }
286
287
288 typedef struct {
289 int Index;
290 char *szMeaning;
291 } CAPS;
292
293 typedef struct {
294 int Mask;
295 char *szMeaning;
296 } TextCAPS;
297
298 CAPS Caps[] = {
299 DRIVERVERSION, "Version number",
300 HORZSIZE, "Width of the display in mm",
301 VERTSIZE, "Height of the display in mm",
302 HORZRES, "Width of the display in pixels",
303 VERTRES, "Height of the display in pixels",
304 LOGPIXELSX, "Horizontal pixels per logical inch",
305 LOGPIXELSY, "Vertical pixels per logical inch",
306 BITSPIXEL, "Num of color bits per pixel",
307 PLANES, "Num of color planes",
308 NUMBRUSHES, "Num of device-specific brushes",
309 NUMPENS, "Num of device-specific pens",
310 NUMMARKERS, "Num of device-specific markers",
311 NUMFONTS, "Num of device-specific fonts",
312 NUMCOLORS, "Num of device's color table entries",
313 ASPECTX, "Relative width of a device pixel",
314 ASPECTY, "Relative height of a device pixel",
315 ASPECTXY, "Diagonal width of the device pixel",
316 PDEVICESIZE, "Size of the PDEVICE structure",
317 CLIPCAPS, "Flag of clipping capabilities",
318 SIZEPALETTE, "Num of the palette entries",
319 NUMRESERVED, "Num of reserved palette entries",
320 COLORRES, "Actual color resolution (bits/pixel)",
321 };
322
323 TextCAPS TextCaps[] = {
324 TC_OP_CHARACTER,"Can do Char Output Precision",
325 TC_OP_STROKE, "Can do Stroke Output Precision",
326 TC_CP_STROKE, "Can do Stroke Clip Precision",
327 TC_CR_90, "Can do Char Rotation - 90-degree",
328 TC_CR_ANY, "Can do Char Rotation - any char",
329 TC_SF_X_YINDEP, "Can do Scaling - X_Y independent",
330 TC_SA_DOUBLE, "Can do Scaling - DOUBLE",
331 TC_SA_INTEGER, "Can do Scaling - INTEGER",
332 TC_SA_CONTIN, "Can do Scaling - ANY",
333 TC_EA_DOUBLE, "Can do Embolding - DOUBLE",
334 TC_IA_ABLE, "Can do Italisizing",
335 TC_UA_ABLE, "Can do Underlining",
336 TC_SO_ABLE, "Can do StrikeOuts",
337 TC_RA_ABLE, "Can do Raster Fonts",
338 TC_VA_ABLE, "Can do Vector Fonts"
339 };
340
341
342 int GetMaxLine()
343 { int MaxLine;
344
345 MaxLine = sizeof(Caps)/sizeof(CAPS) +
346 sizeof(TextCaps)/sizeof(TextCAPS) + 5;
347 return(MaxLine);
348 }
349
350
351 void ShowDevCaps(HDC hDC, HDC hInfoDC)
352 {
353 HFONT hFont;
354 int i, Val;
355 char szString[60];
356 int CapsNum;
357 int TextCapsNum;
358 BOOL MASKTRUE;
359
360 hFont = GetStockObject(SYSTEM_FIXED_FONT);
361 SelectObject(hDC, hFont);
362
363 CapsNum = sizeof(Caps) / sizeof(CAPS);
364 TextCapsNum = sizeof(TextCaps) / sizeof(TextCAPS);
365
366
367 /* Show the common capabilities */
368
369 strcpy(szString, "The Basic Capabilities :");
370 TextOut(hDC, 0, CharY*(0-OY), szString,
371 strlen(szString));
372
373 for (i=0; i<CapsNum; i++)
374 {
375 Val = GetDeviceCaps(hInfoDC, Caps[i].Index);
376 if (Caps[i].Index == DRIVERVERSION)
377 sprintf(szString, "%-45s : %#5x",
378 Caps[i].szMeaning, Val);
379 else
380 sprintf(szString, "%-45s : %5d",
381 Caps[i].szMeaning, Val);
382
383 TextOut(hDC, CharX, CharY*(2+i-OY), szString,
384 strlen(szString));
385 }
386
387
388 /* Show the Text capabilities */
389
390 strcpy(szString, "TEXTCAPS - Text Capabilities :");
391 TextOut(hDC, 0, CharY*(CapsNum+3-OY), szString,
392 strlen(szString));
393
394 Val = GetDeviceCaps(hInfoDC, TEXTCAPS);
395
396 for (i=0; i<TextCapsNum; i++)
397 {
398 if (Val & TextCaps[i].Mask)
399 MASKTRUE = TRUE;
400 else
401 MASKTRUE = FALSE;
402
403 sprintf(szString, "%-45s : %5s", TextCaps[i].szMeaning,
404 (MASKTRUE==TRUE ? "YES" : "NO"));
405 TextOut(hDC, CharX, CharY*(CapsNum+5+i-OY), szString,
406 strlen(szString));
407 }
408 }
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