1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include <awt.h>
27 #include <sun_awt_Win32GraphicsEnvironment.h>
28 #include <sun_awt_Win32FontManager.h>
29 #include "awt_Canvas.h"
30 #include "awt_Win32GraphicsDevice.h"
31 #include "Devices.h"
32 #include "WindowsFlags.h"
33 #include "DllUtil.h"
34
35 BOOL DWMIsCompositionEnabled();
36
37 void initScreens(JNIEnv *env) {
38
39 if (!Devices::UpdateInstance(env)) {
40 JNU_ThrowInternalError(env, "Could not update the devices array.");
41 return;
42 }
43 }
44
45 /**
46 * This function attempts to make a Win32 API call to
47 * BOOL SetProcessDPIAware(VOID);
48 * which is only present on Windows Vista, and which instructs the
49 * Vista Windows Display Manager that this application is High DPI Aware
50 * and does not need to be scaled by the WDM and lied about the
51 * actual system dpi.
52 */
53 static void
54 SetProcessDPIAwareProperty()
55 {
56 typedef BOOL (WINAPI SetProcessDPIAwareFunc)(void);
57 static BOOL bAlreadySet = FALSE;
58
59 // setHighDPIAware is set in WindowsFlags.cpp
60 if (!setHighDPIAware || bAlreadySet) {
61 return;
62 }
63
64 bAlreadySet = TRUE;
65
66 HMODULE hLibUser32Dll = ::LoadLibrary(TEXT("user32.dll"));
67
68 if (hLibUser32Dll != NULL) {
69 SetProcessDPIAwareFunc *lpSetProcessDPIAware =
70 (SetProcessDPIAwareFunc*)GetProcAddress(hLibUser32Dll,
71 "SetProcessDPIAware");
72 if (lpSetProcessDPIAware != NULL) {
73 lpSetProcessDPIAware();
74 }
75 ::FreeLibrary(hLibUser32Dll);
76 }
77 }
78
79 #define DWM_COMP_UNDEFINED (~(TRUE|FALSE))
80 static int dwmIsCompositionEnabled = DWM_COMP_UNDEFINED;
81
82 /**
83 * This function is called from toolkit event handling code when
84 * WM_DWMCOMPOSITIONCHANGED event is received
85 */
86 void DWMResetCompositionEnabled() {
87 dwmIsCompositionEnabled = DWM_COMP_UNDEFINED;
88 (void)DWMIsCompositionEnabled();
89 }
90
91 /**
92 * Returns true if dwm composition is enabled, false if it is not applicable
93 * (if the OS is not Vista) or dwm composition is disabled.
94 */
95 BOOL DWMIsCompositionEnabled() {
96 // cheaper to check than whether it's vista or not
97 if (dwmIsCompositionEnabled != DWM_COMP_UNDEFINED) {
98 return (BOOL)dwmIsCompositionEnabled;
99 }
100
101 if (!IS_WINVISTA) {
102 dwmIsCompositionEnabled = FALSE;
103 return FALSE;
104 }
105
106 BOOL bRes = FALSE;
107
108 try {
109 BOOL bEnabled;
110 HRESULT res = DwmAPI::DwmIsCompositionEnabled(&bEnabled);
111 if (SUCCEEDED(res)) {
112 bRes = bEnabled;
113 J2dTraceLn1(J2D_TRACE_VERBOSE, " composition enabled: %d",bRes);
114 } else {
115 J2dTraceLn1(J2D_TRACE_ERROR,
116 "IsDWMCompositionEnabled: error %x when detecting"\
117 "if composition is enabled", res);
118 }
119 } catch (const DllUtil::Exception &) {
120 J2dTraceLn(J2D_TRACE_ERROR,
121 "IsDWMCompositionEnabled: no DwmIsCompositionEnabled() "\
122 "in dwmapi.dll or dwmapi.dll cannot be loaded");
123 }
124
125 dwmIsCompositionEnabled = bRes;
126
127 JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
128 JNU_CallStaticMethodByName(env, NULL,
129 "sun/awt/Win32GraphicsEnvironment",
130 "dwmCompositionChanged", "(Z)V", (jboolean)bRes);
131 return bRes;
132 }
133
134 /*
135 * Class: sun_awt_Win32GraphicsEnvironment
136 * Method: initDisplay
137 * Signature: ()V
138 */
139 JNIEXPORT void JNICALL
140 Java_sun_awt_Win32GraphicsEnvironment_initDisplay(JNIEnv *env,
141 jclass thisClass)
142 {
143 // This method needs to be called prior to any display-related activity
144 SetProcessDPIAwareProperty();
145
146 DWMIsCompositionEnabled();
147
148 initScreens(env);
149 }
150
151 /*
152 * Class: sun_awt_Win32GraphicsEnvironment
153 * Method: getNumScreens
154 * Signature: ()I
155 */
156 JNIEXPORT jint JNICALL
157 Java_sun_awt_Win32GraphicsEnvironment_getNumScreens(JNIEnv *env,
158 jobject thisobj)
159 {
160 Devices::InstanceAccess devices;
161 return devices->GetNumDevices();
162 }
163
164 /*
165 * Class: sun_awt_Win32GraphicsEnvironment
166 * Method: getDefaultScreen
167 * Signature: ()I
168 */
169 JNIEXPORT jint JNICALL
170 Java_sun_awt_Win32GraphicsEnvironment_getDefaultScreen(JNIEnv *env,
171 jobject thisobj)
172 {
173 return AwtWin32GraphicsDevice::GetDefaultDeviceIndex();
174 }
175
176 /*
177 * Class: sun_awt_Win32FontManager
178 * Method: registerFontWithPlatform
179 * Signature: (Ljava/lang/String;)V
180 */
181 JNIEXPORT void JNICALL
182 Java_sun_awt_Win32FontManager_registerFontWithPlatform(JNIEnv *env,
183 jclass cl,
184 jstring fontName)
185 {
186 LPTSTR file = (LPTSTR)JNU_GetStringPlatformChars(env, fontName, JNI_FALSE);
187 if (file) {
188 ::AddFontResourceEx(file, FR_PRIVATE, NULL);
189 JNU_ReleaseStringPlatformChars(env, fontName, file);
190 }
191 }
192
193
194 /*
195 * Class: sun_awt_Win32FontManagerEnvironment
196 * Method: deRegisterFontWithPlatform
197 * Signature: (Ljava/lang/String;)V
198 *
199 * This method intended for future use.
200 */
201 JNIEXPORT void JNICALL
202 Java_sun_awt_Win32FontManager_deRegisterFontWithPlatform(JNIEnv *env,
203 jclass cl,
204 jstring fontName)
205 {
206 LPTSTR file = (LPTSTR)JNU_GetStringPlatformChars(env, fontName, JNI_FALSE);
207 if (file) {
208 ::RemoveFontResourceEx(file, FR_PRIVATE, NULL);
209 JNU_ReleaseStringPlatformChars(env, fontName, file);
210 }
211 }
212
213 #define EUDCKEY_JA_JP L"EUDC\\932"
214 #define EUDCKEY_ZH_CN L"EUDC\\936"
215 #define EUDCKEY_ZH_TW L"EUDC\\950"
216 #define EUDCKEY_KO_KR L"EUDC\\949"
217 #define LANGID_JA_JP 0x411
218 #define LANGID_ZH_CN 0x0804
219 #define LANGID_ZH_SG 0x1004
220 #define LANGID_ZH_TW 0x0404
221 #define LANGID_ZH_HK 0x0c04
222 #define LANGID_ZH_MO 0x1404
223 #define LANGID_KO_KR 0x0412
224
225
226 JNIEXPORT jstring JNICALL
227 Java_sun_awt_Win32FontManager_getEUDCFontFile(JNIEnv *env, jclass cl) {
228 int rc;
229 HKEY key;
230 DWORD type;
231 WCHAR fontPathBuf[MAX_PATH + 1];
232 unsigned long fontPathLen = MAX_PATH + 1;
233 WCHAR tmpPath[MAX_PATH + 1];
234 LPWSTR fontPath = fontPathBuf;
235 LPWSTR eudcKey = NULL;
236
237 LANGID langID = GetSystemDefaultLangID();
238 //lookup for encoding ID, EUDC only supported in
239 //codepage 932, 936, 949, 950 (and unicode)
240 if (langID == LANGID_JA_JP) {
241 eudcKey = EUDCKEY_JA_JP;
242 } else if (langID == LANGID_ZH_CN || langID == LANGID_ZH_SG) {
243 eudcKey = EUDCKEY_ZH_CN;
244 } else if (langID == LANGID_ZH_HK || langID == LANGID_ZH_TW ||
245 langID == LANGID_ZH_MO) {
246 eudcKey = EUDCKEY_ZH_TW;
247 } else if (langID == LANGID_KO_KR) {
248 eudcKey = EUDCKEY_KO_KR;
249 } else {
250 return NULL;
251 }
252
253 rc = RegOpenKeyEx(HKEY_CURRENT_USER, eudcKey, 0, KEY_READ, &key);
254 if (rc != ERROR_SUCCESS) {
255 return NULL;
256 }
257 rc = RegQueryValueEx(key,
258 L"SystemDefaultEUDCFont",
259 0,
260 &type,
261 (LPBYTE)fontPath,
262 &fontPathLen);
263 RegCloseKey(key);
264 if (rc != ERROR_SUCCESS || type != REG_SZ) {
265 return NULL;
266 }
267 fontPath[fontPathLen] = L'\0';
268 if (wcsstr(fontPath, L"%SystemRoot%")) {
269 //if the fontPath includes %SystemRoot%
270 LPWSTR systemRoot = _wgetenv(L"SystemRoot");
271 if (systemRoot != NULL
272 && swprintf(tmpPath, MAX_PATH, L"%s%s", systemRoot, fontPath + 12) != -1) {
273 fontPath = tmpPath;
274 }
275 else {
276 return NULL;
277 }
278 } else if (wcscmp(fontPath, L"EUDC.TTE") == 0) {
279 //else to see if it only inludes "EUDC.TTE"
280 WCHAR systemRoot[MAX_PATH + 1];
281 if (GetWindowsDirectory(systemRoot, MAX_PATH + 1) != 0) {
282 swprintf(tmpPath, MAX_PATH, L"%s\\FONTS\\EUDC.TTE", systemRoot);
283 fontPath = tmpPath;
284 }
285 else {
286 return NULL;
287 }
288 }
289 return JNU_NewStringPlatform(env, fontPath);
290 }
291
292 /*
293 * Class: sun_awt_Win32GraphicsEnvironment
294 * Method: getXResolution
295 * Signature: ()I
296 */
297 JNIEXPORT jint JNICALL
298 Java_sun_awt_Win32GraphicsEnvironment_getXResolution(JNIEnv *env, jobject wge)
299 {
300 TRY;
301
302 HWND hWnd = ::GetDesktopWindow();
303 HDC hDC = ::GetDC(hWnd);
304 jint result = ::GetDeviceCaps(hDC, LOGPIXELSX);
305 ::ReleaseDC(hWnd, hDC);
306 return result;
307
308 CATCH_BAD_ALLOC_RET(0);
309 }
310
311 /*
312 * Class: sun_awt_Win32GraphicsEnvironment
313 * Method: getYResolution
314 * Signature: ()I
315 */
316 JNIEXPORT jint JNICALL
317 Java_sun_awt_Win32GraphicsEnvironment_getYResolution(JNIEnv *env, jobject wge)
318 {
319 TRY;
320
321 HWND hWnd = ::GetDesktopWindow();
322 HDC hDC = ::GetDC(hWnd);
323 jint result = ::GetDeviceCaps(hDC, LOGPIXELSY);
324 ::ReleaseDC(hWnd, hDC);
325 return result;
326
327 CATCH_BAD_ALLOC_RET(0);
328 }
329
330 /*
331 * Class: sun_awt_Win32GraphicsEnvironment
332 * Method: isVistaOS
333 * Signature: ()Z
334 */
335 JNIEXPORT jboolean JNICALL Java_sun_awt_Win32GraphicsEnvironment_isVistaOS
336 (JNIEnv *env, jclass wgeclass)
337 {
338 return IS_WINVISTA;
339 }