1 /*
2 * Copyright 1999-2008 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 #include <awt.h>
27 #include <sun_awt_Win32GraphicsEnvironment.h>
28 #include "awt_Canvas.h"
29 #include "awt_Win32GraphicsDevice.h"
30 #include "Devices.h"
31 #include "WindowsFlags.h"
32 #include "DllUtil.h"
33
34 BOOL DWMIsCompositionEnabled();
35
36 void initScreens(JNIEnv *env) {
37
38 if (!Devices::UpdateInstance(env)) {
39 JNU_ThrowInternalError(env, "Could not update the devices array.");
40 return;
41 }
42 }
43
44 /**
45 * This function attempts to make a Win32 API call to
46 * BOOL SetProcessDPIAware(VOID);
47 * which is only present on Windows Vista, and which instructs the
48 * Vista Windows Display Manager that this application is High DPI Aware
49 * and does not need to be scaled by the WDM and lied about the
50 * actual system dpi.
51 */
52 static void
53 SetProcessDPIAwareProperty()
54 {
55 typedef BOOL (WINAPI SetProcessDPIAwareFunc)(void);
56 static BOOL bAlreadySet = FALSE;
57
58 // setHighDPIAware is set in WindowsFlags.cpp
59 if (!setHighDPIAware || bAlreadySet) {
60 return;
61 }
62
63 bAlreadySet = TRUE;
64
65 HMODULE hLibUser32Dll = ::LoadLibrary(TEXT("user32.dll"));
66
67 if (hLibUser32Dll != NULL) {
68 SetProcessDPIAwareFunc *lpSetProcessDPIAware =
69 (SetProcessDPIAwareFunc*)GetProcAddress(hLibUser32Dll,
70 "SetProcessDPIAware");
71 if (lpSetProcessDPIAware != NULL) {
72 lpSetProcessDPIAware();
73 }
74 ::FreeLibrary(hLibUser32Dll);
75 }
76 }
77
78 #define DWM_COMP_UNDEFINED (~(TRUE|FALSE))
79 static int dwmIsCompositionEnabled = DWM_COMP_UNDEFINED;
80
81 /**
82 * This function is called from toolkit event handling code when
83 * WM_DWMCOMPOSITIONCHANGED event is received
84 */
85 void DWMResetCompositionEnabled() {
86 dwmIsCompositionEnabled = DWM_COMP_UNDEFINED;
87 (void)DWMIsCompositionEnabled();
88 }
89
90 /**
91 * Returns true if dwm composition is enabled, false if it is not applicable
92 * (if the OS is not Vista) or dwm composition is disabled.
93 */
94 BOOL DWMIsCompositionEnabled() {
95 // cheaper to check than whether it's vista or not
96 if (dwmIsCompositionEnabled != DWM_COMP_UNDEFINED) {
97 return (BOOL)dwmIsCompositionEnabled;
98 }
99
100 if (!IS_WINVISTA) {
101 dwmIsCompositionEnabled = FALSE;
102 return FALSE;
103 }
104
105 BOOL bRes = FALSE;
106
107 try {
108 BOOL bEnabled;
109 HRESULT res = DwmAPI::DwmIsCompositionEnabled(&bEnabled);
110 if (SUCCEEDED(res)) {
111 bRes = bEnabled;
112 J2dTraceLn1(J2D_TRACE_VERBOSE, " composition enabled: %d",bRes);
113 } else {
114 J2dTraceLn1(J2D_TRACE_ERROR,
115 "IsDWMCompositionEnabled: error %x when detecting"\
116 "if composition is enabled", res);
117 }
118 } catch (const DllUtil::Exception &) {
119 J2dTraceLn(J2D_TRACE_ERROR,
120 "IsDWMCompositionEnabled: no DwmIsCompositionEnabled() "\
121 "in dwmapi.dll or dwmapi.dll cannot be loaded");
122 }
123
124 dwmIsCompositionEnabled = bRes;
125
126 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
127 JNU_CallStaticMethodByName(env, NULL,
128 "sun/awt/Win32GraphicsEnvironment",
129 "dwmCompositionChanged", "(Z)V", (jboolean)bRes);
130 return bRes;
131 }
132
133 /*
134 * Class: sun_awt_Win32GraphicsEnvironment
135 * Method: initDisplay
136 * Signature: ()V
137 */
138 JNIEXPORT void JNICALL
139 Java_sun_awt_Win32GraphicsEnvironment_initDisplay(JNIEnv *env,
140 jclass thisClass)
141 {
142 // This method needs to be called prior to any display-related activity
143 SetProcessDPIAwareProperty();
144
145 DWMIsCompositionEnabled();
146
147 initScreens(env);
148 }
149
150 /*
151 * Class: sun_awt_Win32GraphicsEnvironment
152 * Method: getNumScreens
153 * Signature: ()I
154 */
155 JNIEXPORT jint JNICALL
156 Java_sun_awt_Win32GraphicsEnvironment_getNumScreens(JNIEnv *env,
157 jobject thisobj)
158 {
159 Devices::InstanceAccess devices;
160 return devices->GetNumDevices();
161 }
162
163 /*
164 * Class: sun_awt_Win32GraphicsEnvironment
165 * Method: getDefaultScreen
166 * Signature: ()I
167 */
168 JNIEXPORT jint JNICALL
169 Java_sun_awt_Win32GraphicsEnvironment_getDefaultScreen(JNIEnv *env,
170 jobject thisobj)
171 {
172 return AwtWin32GraphicsDevice::GetDefaultDeviceIndex();
173 }
174
175 /*
176 * Class: sun_awt_Win32GraphicsEnvironment
177 * Method: registerFontWithPlatform
178 * Signature: (Ljava/lang/String;)V
179 */
180 JNIEXPORT void JNICALL
181 Java_sun_awt_Win32GraphicsEnvironment_registerFontWithPlatform(JNIEnv *env,
182 jclass cl,
183 jstring fontName)
184 {
185 LPTSTR file = (LPTSTR)JNU_GetStringPlatformChars(env, fontName, JNI_FALSE);
186 if (file) {
187 ::AddFontResourceEx(file, FR_PRIVATE, NULL);
188 JNU_ReleaseStringPlatformChars(env, fontName, file);
189 }
190 }
191
192
193 /*
194 * Class: sun_awt_Win32GraphicsEnvironment
195 * Method: deRegisterFontWithPlatform
196 * Signature: (Ljava/lang/String;)V
197 *
198 * This method intended for future use.
199 */
200 JNIEXPORT void JNICALL
201 Java_sun_awt_Win32GraphicsEnvironment_deRegisterFontWithPlatform(JNIEnv *env,
202 jclass cl,
203 jstring fontName)
204 {
205 LPTSTR file = (LPTSTR)JNU_GetStringPlatformChars(env, fontName, JNI_FALSE);
206 if (file) {
207 ::RemoveFontResourceEx(file, FR_PRIVATE, NULL);
208 JNU_ReleaseStringPlatformChars(env, fontName, file);
209 }
210 }
211
212 #define EUDCKEY_JA_JP L"EUDC\\932"
213 #define EUDCKEY_ZH_CN L"EUDC\\936"
214 #define EUDCKEY_ZH_TW L"EUDC\\950"
215 #define EUDCKEY_KO_KR L"EUDC\\949"
216 #define LANGID_JA_JP 0x411
217 #define LANGID_ZH_CN 0x0804
218 #define LANGID_ZH_SG 0x1004
219 #define LANGID_ZH_TW 0x0404
220 #define LANGID_ZH_HK 0x0c04
221 #define LANGID_ZH_MO 0x1404
222 #define LANGID_KO_KR 0x0412
223
224
225 JNIEXPORT jstring JNICALL
226 Java_sun_awt_Win32GraphicsEnvironment_getEUDCFontFile(JNIEnv *env, jclass cl) {
227 int rc;
228 HKEY key;
229 DWORD type;
230 WCHAR fontPathBuf[MAX_PATH + 1];
231 unsigned long fontPathLen = MAX_PATH + 1;
232 WCHAR tmpPath[MAX_PATH + 1];
233 LPWSTR fontPath = fontPathBuf;
234 LPWSTR eudcKey = NULL;
235
236 LANGID langID = GetSystemDefaultLangID();
237 //lookup for encoding ID, EUDC only supported in
238 //codepage 932, 936, 949, 950 (and unicode)
239 if (langID == LANGID_JA_JP) {
240 eudcKey = EUDCKEY_JA_JP;
241 } else if (langID == LANGID_ZH_CN || langID == LANGID_ZH_SG) {
242 eudcKey = EUDCKEY_ZH_CN;
243 } else if (langID == LANGID_ZH_HK || langID == LANGID_ZH_TW ||
244 langID == LANGID_ZH_MO) {
245 eudcKey = EUDCKEY_ZH_TW;
246 } else if (langID == LANGID_KO_KR) {
247 eudcKey = EUDCKEY_KO_KR;
248 } else {
249 return NULL;
250 }
251
252 rc = RegOpenKeyEx(HKEY_CURRENT_USER, eudcKey, 0, KEY_READ, &key);
253 if (rc != ERROR_SUCCESS) {
254 return NULL;
255 }
256 rc = RegQueryValueEx(key,
257 L"SystemDefaultEUDCFont",
258 0,
259 &type,
260 (LPBYTE)fontPath,
261 &fontPathLen);
262 RegCloseKey(key);
263 if (rc != ERROR_SUCCESS || type != REG_SZ) {
264 return NULL;
265 }
266 fontPath[fontPathLen] = L'\0';
267 if (wcsstr(fontPath, L"%SystemRoot%")) {
268 //if the fontPath includes %SystemRoot%
269 LPWSTR systemRoot = _wgetenv(L"SystemRoot");
270 if (systemRoot != NULL
271 && swprintf(tmpPath, L"%s%s", systemRoot, fontPath + 12) != -1) {
272 fontPath = tmpPath;
273 }
274 else {
275 return NULL;
276 }
277 } else if (wcscmp(fontPath, L"EUDC.TTE") == 0) {
278 //else to see if it only inludes "EUDC.TTE"
279 WCHAR systemRoot[MAX_PATH + 1];
280 if (GetWindowsDirectory(systemRoot, MAX_PATH + 1) != 0) {
281 swprintf(tmpPath, L"%s\\FONTS\\EUDC.TTE", systemRoot);
282 fontPath = tmpPath;
283 }
284 else {
285 return NULL;
286 }
287 }
288 return JNU_NewStringPlatform(env, fontPath);
289 }
290
291 /*
292 * Class: sun_awt_Win32GraphicsEnvironment
293 * Method: getXResolution
294 * Signature: ()I
295 */
296 JNIEXPORT jint JNICALL
297 Java_sun_awt_Win32GraphicsEnvironment_getXResolution(JNIEnv *env, jobject wge)
298 {
299 TRY;
300
301 HWND hWnd = ::GetDesktopWindow();
302 HDC hDC = ::GetDC(hWnd);
303 jint result = ::GetDeviceCaps(hDC, LOGPIXELSX);
304 ::ReleaseDC(hWnd, hDC);
305 return result;
306
307 CATCH_BAD_ALLOC_RET(0);
308 }
309
310 /*
311 * Class: sun_awt_Win32GraphicsEnvironment
312 * Method: getYResolution
313 * Signature: ()I
314 */
315 JNIEXPORT jint JNICALL
316 Java_sun_awt_Win32GraphicsEnvironment_getYResolution(JNIEnv *env, jobject wge)
317 {
318 TRY;
319
320 HWND hWnd = ::GetDesktopWindow();
321 HDC hDC = ::GetDC(hWnd);
322 jint result = ::GetDeviceCaps(hDC, LOGPIXELSY);
323 ::ReleaseDC(hWnd, hDC);
324 return result;
325
326 CATCH_BAD_ALLOC_RET(0);
327 }
328
329 /*
330 * Class: sun_awt_Win32GraphicsEnvironment
331 * Method: isVistaOS
332 * Signature: ()Z
333 */
334 JNIEXPORT jboolean JNICALL Java_sun_awt_Win32GraphicsEnvironment_isVistaOS
335 (JNIEnv *env, jclass wgeclass)
336 {
337 return IS_WINVISTA;
338 }