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 34namespace android { 35 36// ---------------------------------------------------------------------------- 37 38struct offsets_t { 39 jfieldID display; 40 jfieldID pixelFormat; 41 jfieldID fps; 42 jfieldID density; 43 jfieldID xdpi; 44 jfieldID ydpi; 45}; 46static offsets_t offsets; 47 48// ---------------------------------------------------------------------------- 49 50static 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 66static 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 73static 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 80static 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 87static jint android_view_Display_getDisplayCount( 88 JNIEnv* env, jclass clazz) 89{ 90 return SurfaceComposerClient::getNumberOfDisplays(); 91} 92 93// ---------------------------------------------------------------------------- 94 95const char* const kClassPathName = "android/view/Display"; 96 97static void nativeClassInit(JNIEnv* env, jclass clazz); 98 99static 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 114void 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 124int register_android_view_Display(JNIEnv* env) 125{ 126 return AndroidRuntime::registerNativeMethods(env, 127 kClassPathName, gMethods, NELEM(gMethods)); 128} 129 130}; 131