1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <assert.h>
#include <ui/SurfaceComposerClient.h>
#include <ui/PixelFormat.h>
#include <ui/DisplayInfo.h>
#include "jni.h"
#include <android_runtime/AndroidRuntime.h>
#include <utils/misc.h>
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
struct offsets_t {
jfieldID display;
jfieldID pixelFormat;
jfieldID fps;
jfieldID density;
jfieldID xdpi;
jfieldID ydpi;
};
static offsets_t offsets;
static void doThrow(JNIEnv* env, const char* exc, const char* msg = NULL)
{
jclass npeClazz = env->FindClass(exc);
env->ThrowNew(npeClazz, msg);
}
// ----------------------------------------------------------------------------
static void android_view_Display_init(
JNIEnv* env, jobject clazz, jint dpy)
{
DisplayInfo info;
status_t err = SurfaceComposerClient::getDisplayInfo(DisplayID(dpy), &info);
if (err < 0) {
doThrow(env, "java/lang/IllegalArgumentException");
return;
}
env->SetIntField(clazz, offsets.pixelFormat,info.pixelFormatInfo.format);
env->SetFloatField(clazz, offsets.fps, info.fps);
env->SetFloatField(clazz, offsets.density, info.density);
env->SetFloatField(clazz, offsets.xdpi, info.xdpi);
env->SetFloatField(clazz, offsets.ydpi, info.ydpi);
}
static jint android_view_Display_getWidth(
JNIEnv* env, jobject clazz)
{
DisplayID dpy = env->GetIntField(clazz, offsets.display);
return SurfaceComposerClient::getDisplayWidth(dpy);
}
static jint android_view_Display_getHeight(
JNIEnv* env, jobject clazz)
{
DisplayID dpy = env->GetIntField(clazz, offsets.display);
return SurfaceComposerClient::getDisplayHeight(dpy);
}
static jint android_view_Display_getOrientation(
JNIEnv* env, jobject clazz)
{
DisplayID dpy = env->GetIntField(clazz, offsets.display);
return SurfaceComposerClient::getDisplayOrientation(dpy);
}
static jint android_view_Display_getDisplayCount(
JNIEnv* env, jclass clazz)
{
return SurfaceComposerClient::getNumberOfDisplays();
}
// ----------------------------------------------------------------------------
const char* const kClassPathName = "android/view/Display";
static void nativeClassInit(JNIEnv* env, jclass clazz);
static JNINativeMethod gMethods[] = {
{ "nativeClassInit", "()V",
(void*)nativeClassInit },
{ "getDisplayCount", "()I",
(void*)android_view_Display_getDisplayCount },
{ "init", "(I)V",
(void*)android_view_Display_init },
{ "getWidth", "()I",
(void*)android_view_Display_getWidth },
{ "getHeight", "()I",
(void*)android_view_Display_getHeight },
{ "getOrientation", "()I",
(void*)android_view_Display_getOrientation }
};
void nativeClassInit(JNIEnv* env, jclass clazz)
{
offsets.display = env->GetFieldID(clazz, "mDisplay", "I");
offsets.pixelFormat = env->GetFieldID(clazz, "mPixelFormat", "I");
offsets.fps = env->GetFieldID(clazz, "mRefreshRate", "F");
offsets.density = env->GetFieldID(clazz, "mDensity", "F");
offsets.xdpi = env->GetFieldID(clazz, "mDpiX", "F");
offsets.ydpi = env->GetFieldID(clazz, "mDpiY", "F");
}
int register_android_view_Display(JNIEnv* env)
{
return AndroidRuntime::registerNativeMethods(env,
kClassPathName, gMethods, NELEM(gMethods));
}
};
|
