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