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 <ui/SurfaceComposerClient.h>
21 #include <ui/PixelFormat.h>
22 #include <ui/DisplayInfo.h>
23
24 #include "jni.h"
25 #include <android_runtime/AndroidRuntime.h>
26 #include <utils/misc.h>
27
28 // ----------------------------------------------------------------------------
29
30 namespace android {
31
32 // ----------------------------------------------------------------------------
33
34 struct offsets_t {
35 jfieldID display;
36 jfieldID pixelFormat;
37 jfieldID fps;
38 jfieldID density;
39 jfieldID xdpi;
40 jfieldID ydpi;
41 };
42 static offsets_t offsets;
43
doThrow(JNIEnv * env,const char * exc,const char * msg=NULL)44 static void doThrow(JNIEnv* env, const char* exc, const char* msg = NULL)
45 {
46 jclass npeClazz = env->FindClass(exc);
47 env->ThrowNew(npeClazz, msg);
48 }
49
50 // ----------------------------------------------------------------------------
51
android_view_Display_init(JNIEnv * env,jobject clazz,jint dpy)52 static void android_view_Display_init(
53 JNIEnv* env, jobject clazz, jint dpy)
54 {
55 DisplayInfo info;
56 status_t err = SurfaceComposerClient::getDisplayInfo(DisplayID(dpy), &info);
57 if (err < 0) {
58 doThrow(env, "java/lang/IllegalArgumentException");
59 return;
60 }
61 env->SetIntField(clazz, offsets.pixelFormat,info.pixelFormatInfo.format);
62 env->SetFloatField(clazz, offsets.fps, info.fps);
63 env->SetFloatField(clazz, offsets.density, info.density);
64 env->SetFloatField(clazz, offsets.xdpi, info.xdpi);
65 env->SetFloatField(clazz, offsets.ydpi, info.ydpi);
66 }
67
android_view_Display_getWidth(JNIEnv * env,jobject clazz)68 static jint android_view_Display_getWidth(
69 JNIEnv* env, jobject clazz)
70 {
71 DisplayID dpy = env->GetIntField(clazz, offsets.display);
72 return SurfaceComposerClient::getDisplayWidth(dpy);
73 }
74
android_view_Display_getHeight(JNIEnv * env,jobject clazz)75 static jint android_view_Display_getHeight(
76 JNIEnv* env, jobject clazz)
77 {
78 DisplayID dpy = env->GetIntField(clazz, offsets.display);
79 return SurfaceComposerClient::getDisplayHeight(dpy);
80 }
81
android_view_Display_getOrientation(JNIEnv * env,jobject clazz)82 static jint android_view_Display_getOrientation(
83 JNIEnv* env, jobject clazz)
84 {
85 DisplayID dpy = env->GetIntField(clazz, offsets.display);
86 return SurfaceComposerClient::getDisplayOrientation(dpy);
87 }
88
android_view_Display_getDisplayCount(JNIEnv * env,jclass clazz)89 static jint android_view_Display_getDisplayCount(
90 JNIEnv* env, jclass clazz)
91 {
92 return SurfaceComposerClient::getNumberOfDisplays();
93 }
94
95 // ----------------------------------------------------------------------------
96
97 const char* const kClassPathName = "android/view/Display";
98
99 static void nativeClassInit(JNIEnv* env, jclass clazz);
100
101 static JNINativeMethod gMethods[] = {
102 { "nativeClassInit", "()V",
103 (void*)nativeClassInit },
104 { "getDisplayCount", "()I",
105 (void*)android_view_Display_getDisplayCount },
106 { "init", "(I)V",
107 (void*)android_view_Display_init },
108 { "getWidth", "()I",
109 (void*)android_view_Display_getWidth },
110 { "getHeight", "()I",
111 (void*)android_view_Display_getHeight },
112 { "getOrientation", "()I",
113 (void*)android_view_Display_getOrientation }
114 };
115
nativeClassInit(JNIEnv * env,jclass clazz)116 void nativeClassInit(JNIEnv* env, jclass clazz)
117 {
118 offsets.display = env->GetFieldID(clazz, "mDisplay", "I");
119 offsets.pixelFormat = env->GetFieldID(clazz, "mPixelFormat", "I");
120 offsets.fps = env->GetFieldID(clazz, "mRefreshRate", "F");
121 offsets.density = env->GetFieldID(clazz, "mDensity", "F");
122 offsets.xdpi = env->GetFieldID(clazz, "mDpiX", "F");
123 offsets.ydpi = env->GetFieldID(clazz, "mDpiY", "F");
124 }
125
register_android_view_Display(JNIEnv * env)126 int register_android_view_Display(JNIEnv* env)
127 {
128 return AndroidRuntime::registerNativeMethods(env,
129 kClassPathName, gMethods, NELEM(gMethods));
130 }
131
132 };
133
134