51 /*
52 * Find the best possible match in the list of display modes that we can switch to based on
53 * the provided parameters.
54 */
55 static CGDisplayModeRef getBestModeForParameters(CFArrayRef allModes, int w, int h, int bpp, int refrate) {
56 CGDisplayModeRef bestGuess = NULL;
57 CFIndex numModes = CFArrayGetCount(allModes), n;
58 int thisBpp = 0;
59 for(n = 0; n < numModes; n++ ) {
60 CGDisplayModeRef cRef = (CGDisplayModeRef) CFArrayGetValueAtIndex(allModes, n);
61 if(cRef == NULL) {
62 continue;
63 }
64 CFStringRef modeString = CGDisplayModeCopyPixelEncoding(cRef);
65 thisBpp = getBPPFromModeString(modeString);
66 CFRelease(modeString);
67 if (thisBpp != bpp || (int)CGDisplayModeGetHeight(cRef) != h || (int)CGDisplayModeGetWidth(cRef) != w) {
68 // One of the key parameters does not match
69 continue;
70 }
71 // Refresh rate might be 0 in display mode and we ask for specific display rate
72 // but if we do not find exact match then 0 refresh rate might be just Ok
73 if (CGDisplayModeGetRefreshRate(cRef) == refrate) {
74 // Exact match
75 return cRef;
76 }
77 if (CGDisplayModeGetRefreshRate(cRef) == 0) {
78 // Not exactly what was asked for, but may fit our needs if we don't find an exact match
79 bestGuess = cRef;
80 }
81 }
82 return bestGuess;
83 }
84
85 /*
86 * Create a new java.awt.DisplayMode instance based on provided CGDisplayModeRef
87 */
88 static jobject createJavaDisplayMode(CGDisplayModeRef mode, JNIEnv *env, jint displayID) {
89 jobject ret = NULL;
90 jint h, w, bpp, refrate;
148 */
149 JNIEXPORT void JNICALL
150 Java_sun_awt_CGraphicsDevice_nativeSetDisplayMode
151 (JNIEnv *env, jclass class, jint displayID, jint w, jint h, jint bpp, jint refrate)
152 {
153 JNF_COCOA_ENTER(env);
154 CFArrayRef allModes = CGDisplayCopyAllDisplayModes(displayID, NULL);
155 CGDisplayModeRef closestMatch = getBestModeForParameters(allModes, (int)w, (int)h, (int)bpp, (int)refrate);
156 if (closestMatch != NULL) {
157 [JNFRunLoop performOnMainThreadWaiting:YES withBlock:^(){
158 CGDisplayConfigRef config;
159 CGError retCode = CGBeginDisplayConfiguration(&config);
160 if (retCode == kCGErrorSuccess) {
161 CGConfigureDisplayWithDisplayMode(config, displayID, closestMatch, NULL);
162 CGCompleteDisplayConfiguration(config, kCGConfigureForAppOnly);
163 if (config != NULL) {
164 CFRelease(config);
165 }
166 }
167 }];
168 }
169 CFRelease(allModes);
170 JNF_COCOA_EXIT(env);
171 }
172
173 /*
174 * Class: sun_awt_CGraphicsDevice
175 * Method: nativeGetDisplayMode
176 * Signature: (I)Ljava/awt/DisplayMode
177 */
178 JNIEXPORT jobject JNICALL
179 Java_sun_awt_CGraphicsDevice_nativeGetDisplayMode
180 (JNIEnv *env, jclass class, jint displayID)
181 {
182 jobject ret = NULL;
183 CGDisplayModeRef currentMode = CGDisplayCopyDisplayMode(displayID);
184 ret = createJavaDisplayMode(currentMode, env, displayID);
185 CGDisplayModeRelease(currentMode);
186 return ret;
187 }
188
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51 /*
52 * Find the best possible match in the list of display modes that we can switch to based on
53 * the provided parameters.
54 */
55 static CGDisplayModeRef getBestModeForParameters(CFArrayRef allModes, int w, int h, int bpp, int refrate) {
56 CGDisplayModeRef bestGuess = NULL;
57 CFIndex numModes = CFArrayGetCount(allModes), n;
58 int thisBpp = 0;
59 for(n = 0; n < numModes; n++ ) {
60 CGDisplayModeRef cRef = (CGDisplayModeRef) CFArrayGetValueAtIndex(allModes, n);
61 if(cRef == NULL) {
62 continue;
63 }
64 CFStringRef modeString = CGDisplayModeCopyPixelEncoding(cRef);
65 thisBpp = getBPPFromModeString(modeString);
66 CFRelease(modeString);
67 if (thisBpp != bpp || (int)CGDisplayModeGetHeight(cRef) != h || (int)CGDisplayModeGetWidth(cRef) != w) {
68 // One of the key parameters does not match
69 continue;
70 }
71
72 if (refrate == 0) { // REFRESH_RATE_UNKNOWN
73 return cRef;
74 }
75
76 // Refresh rate might be 0 in display mode and we ask for specific display rate
77 // but if we do not find exact match then 0 refresh rate might be just Ok
78 if (CGDisplayModeGetRefreshRate(cRef) == refrate) {
79 // Exact match
80 return cRef;
81 }
82 if (CGDisplayModeGetRefreshRate(cRef) == 0) {
83 // Not exactly what was asked for, but may fit our needs if we don't find an exact match
84 bestGuess = cRef;
85 }
86 }
87 return bestGuess;
88 }
89
90 /*
91 * Create a new java.awt.DisplayMode instance based on provided CGDisplayModeRef
92 */
93 static jobject createJavaDisplayMode(CGDisplayModeRef mode, JNIEnv *env, jint displayID) {
94 jobject ret = NULL;
95 jint h, w, bpp, refrate;
153 */
154 JNIEXPORT void JNICALL
155 Java_sun_awt_CGraphicsDevice_nativeSetDisplayMode
156 (JNIEnv *env, jclass class, jint displayID, jint w, jint h, jint bpp, jint refrate)
157 {
158 JNF_COCOA_ENTER(env);
159 CFArrayRef allModes = CGDisplayCopyAllDisplayModes(displayID, NULL);
160 CGDisplayModeRef closestMatch = getBestModeForParameters(allModes, (int)w, (int)h, (int)bpp, (int)refrate);
161 if (closestMatch != NULL) {
162 [JNFRunLoop performOnMainThreadWaiting:YES withBlock:^(){
163 CGDisplayConfigRef config;
164 CGError retCode = CGBeginDisplayConfiguration(&config);
165 if (retCode == kCGErrorSuccess) {
166 CGConfigureDisplayWithDisplayMode(config, displayID, closestMatch, NULL);
167 CGCompleteDisplayConfiguration(config, kCGConfigureForAppOnly);
168 if (config != NULL) {
169 CFRelease(config);
170 }
171 }
172 }];
173 } else {
174 [JNFException raise:env as:kIllegalArgumentException reason:"Invalid display mode"];
175 }
176
177 CFRelease(allModes);
178 JNF_COCOA_EXIT(env);
179 }
180
181 /*
182 * Class: sun_awt_CGraphicsDevice
183 * Method: nativeGetDisplayMode
184 * Signature: (I)Ljava/awt/DisplayMode
185 */
186 JNIEXPORT jobject JNICALL
187 Java_sun_awt_CGraphicsDevice_nativeGetDisplayMode
188 (JNIEnv *env, jclass class, jint displayID)
189 {
190 jobject ret = NULL;
191 CGDisplayModeRef currentMode = CGDisplayCopyDisplayMode(displayID);
192 ret = createJavaDisplayMode(currentMode, env, displayID);
193 CGDisplayModeRelease(currentMode);
194 return ret;
195 }
196
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