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/PixelFormat.h>
21
22 #include "jni.h"
23 #include <android_runtime/AndroidRuntime.h>
24 #include <utils/misc.h>
25
26 // ----------------------------------------------------------------------------
27
28 namespace android {
29
30 // ----------------------------------------------------------------------------
31
32 struct offsets_t {
33 jfieldID bytesPerPixel;
34 jfieldID bitsPerPixel;
35 };
36
37 static offsets_t offsets;
38
doThrow(JNIEnv * env,const char * exc,const char * msg=NULL)39 static void doThrow(JNIEnv* env, const char* exc, const char* msg = NULL)
40 {
41 jclass npeClazz = env->FindClass(exc);
42 env->ThrowNew(npeClazz, msg);
43 }
44
45 // ----------------------------------------------------------------------------
46
android_graphics_getPixelFormatInfo(JNIEnv * env,jobject clazz,jint format,jobject pixelFormatObject)47 static void android_graphics_getPixelFormatInfo(
48 JNIEnv* env, jobject clazz, jint format, jobject pixelFormatObject)
49 {
50 PixelFormatInfo info;
51 status_t err = getPixelFormatInfo(format, &info);
52 if (err < 0) {
53 doThrow(env, "java/lang/IllegalArgumentException");
54 return;
55 }
56 env->SetIntField(pixelFormatObject, offsets.bytesPerPixel, info.bytesPerPixel);
57 env->SetIntField(pixelFormatObject, offsets.bitsPerPixel, info.bitsPerPixel);
58 }
59 // ----------------------------------------------------------------------------
60
61 const char* const kClassPathName = "android/graphics/PixelFormat";
62
63 static void nativeClassInit(JNIEnv* env, jclass clazz);
64
65 static JNINativeMethod gMethods[] = {
66 { "nativeClassInit", "()V",
67 (void*)nativeClassInit },
68 { "getPixelFormatInfo", "(ILandroid/graphics/PixelFormat;)V",
69 (void*)android_graphics_getPixelFormatInfo
70 }
71 };
72
nativeClassInit(JNIEnv * env,jclass clazz)73 void nativeClassInit(JNIEnv* env, jclass clazz)
74 {
75 offsets.bytesPerPixel = env->GetFieldID(clazz, "bytesPerPixel", "I");
76 offsets.bitsPerPixel = env->GetFieldID(clazz, "bitsPerPixel", "I");
77 }
78
register_android_graphics_PixelFormat(JNIEnv * env)79 int register_android_graphics_PixelFormat(JNIEnv* env)
80 {
81 return AndroidRuntime::registerNativeMethods(env,
82 kClassPathName, gMethods, NELEM(gMethods));
83 }
84
85 };
86