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 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 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 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 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 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 }; 113 114 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 } 123 124 int register_android_view_Display(JNIEnv* env) 125 { 126 return AndroidRuntime::registerNativeMethods(env, 127 kClassPathName, gMethods, NELEM(gMethods)); 128 } 129 130 }; 131