1 /*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stdio.h>
18 #include <assert.h>
19
20 #include <cutils/properties.h>
21
22 #include <surfaceflinger/SurfaceComposerClient.h>
23 #include <ui/PixelFormat.h>
24 #include <ui/DisplayInfo.h>
25
26 #include "jni.h"
27 #include "JNIHelp.h"
28 #include <android_runtime/AndroidRuntime.h>
29 #include <utils/misc.h>
30 #include <utils/Log.h>
31
32 // ----------------------------------------------------------------------------
33
34 namespace android {
35
36 // ----------------------------------------------------------------------------
37
38 struct offsets_t {
39 jfieldID display;
40 jfieldID pixelFormat;
41 jfieldID fps;
42 jfieldID density;
43 jfieldID xdpi;
44 jfieldID ydpi;
45 };
46 static offsets_t offsets;
47
48 // ----------------------------------------------------------------------------
49
android_view_Display_init(JNIEnv * env,jobject clazz,jint dpy)50 static void android_view_Display_init(
51 JNIEnv* env, jobject clazz, jint dpy)
52 {
53 DisplayInfo info;
54 status_t err = SurfaceComposerClient::getDisplayInfo(DisplayID(dpy), &info);
55 if (err < 0) {
56 jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
57 return;
58 }
59 env->SetIntField(clazz, offsets.pixelFormat,info.pixelFormatInfo.format);
60 env->SetFloatField(clazz, offsets.fps, info.fps);
61 env->SetFloatField(clazz, offsets.density, info.density);
62 env->SetFloatField(clazz, offsets.xdpi, info.xdpi);
63 env->SetFloatField(clazz, offsets.ydpi, info.ydpi);
64 }
65
android_view_Display_getRawWidthNative(JNIEnv * env,jobject clazz)66 static jint android_view_Display_getRawWidthNative(
67 JNIEnv* env, jobject clazz)
68 {
69 DisplayID dpy = env->GetIntField(clazz, offsets.display);
70 return SurfaceComposerClient::getDisplayWidth(dpy);
71 }
72
android_view_Display_getRawHeightNative(JNIEnv * env,jobject clazz)73 static jint android_view_Display_getRawHeightNative(
74 JNIEnv* env, jobject clazz)
75 {
76 DisplayID dpy = env->GetIntField(clazz, offsets.display);
77 return SurfaceComposerClient::getDisplayHeight(dpy);
78 }
79
android_view_Display_getOrientation(JNIEnv * env,jobject clazz)80 static jint android_view_Display_getOrientation(
81 JNIEnv* env, jobject clazz)
82 {
83 DisplayID dpy = env->GetIntField(clazz, offsets.display);
84 return SurfaceComposerClient::getDisplayOrientation(dpy);
85 }
86
android_view_Display_getDisplayCount(JNIEnv * env,jclass clazz)87 static jint android_view_Display_getDisplayCount(
88 JNIEnv* env, jclass clazz)
89 {
90 return SurfaceComposerClient::getNumberOfDisplays();
91 }
92
93 // ----------------------------------------------------------------------------
94
95 const char* const kClassPathName = "android/view/Display";
96
97 static void nativeClassInit(JNIEnv* env, jclass clazz);
98
99 static JNINativeMethod gMethods[] = {
100 { "nativeClassInit", "()V",
101 (void*)nativeClassInit },
102 { "getDisplayCount", "()I",
103 (void*)android_view_Display_getDisplayCount },
104 { "init", "(I)V",
105 (void*)android_view_Display_init },
106 { "getRawWidthNative", "()I",
107 (void*)android_view_Display_getRawWidthNative },
108 { "getRawHeightNative", "()I",
109 (void*)android_view_Display_getRawHeightNative },
110 { "getOrientation", "()I",
111 (void*)android_view_Display_getOrientation }
112 };
113
nativeClassInit(JNIEnv * env,jclass clazz)114 void nativeClassInit(JNIEnv* env, jclass clazz)
115 {
116 offsets.display = env->GetFieldID(clazz, "mDisplay", "I");
117 offsets.pixelFormat = env->GetFieldID(clazz, "mPixelFormat", "I");
118 offsets.fps = env->GetFieldID(clazz, "mRefreshRate", "F");
119 offsets.density = env->GetFieldID(clazz, "mDensity", "F");
120 offsets.xdpi = env->GetFieldID(clazz, "mDpiX", "F");
121 offsets.ydpi = env->GetFieldID(clazz, "mDpiY", "F");
122 }
123
register_android_view_Display(JNIEnv * env)124 int register_android_view_Display(JNIEnv* env)
125 {
126 return AndroidRuntime::registerNativeMethods(env,
127 kClassPathName, gMethods, NELEM(gMethods));
128 }
129
130 };
131