1 /*
2 * Copyright (C) 2009 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 <android/bitmap.h>
18 #include <GraphicsJNI.h>
19
AndroidBitmap_getInfo(JNIEnv * env,jobject jbitmap,AndroidBitmapInfo * info)20 int AndroidBitmap_getInfo(JNIEnv* env, jobject jbitmap,
21 AndroidBitmapInfo* info) {
22 if (NULL == env || NULL == jbitmap) {
23 return ANDROID_BITMAP_RESULT_BAD_PARAMETER;
24 }
25
26 SkBitmap* bm = GraphicsJNI::getNativeBitmap(env, jbitmap);
27 if (NULL == bm) {
28 return ANDROID_BITMAP_RESULT_JNI_EXCEPTION;
29 }
30
31 if (info) {
32 info->width = bm->width();
33 info->height = bm->height();
34 info->stride = bm->rowBytes();
35 info->flags = 0;
36
37 switch (bm->config()) {
38 case SkBitmap::kARGB_8888_Config:
39 info->format = ANDROID_BITMAP_FORMAT_RGBA_8888;
40 break;
41 case SkBitmap::kRGB_565_Config:
42 info->format = ANDROID_BITMAP_FORMAT_RGB_565;
43 break;
44 case SkBitmap::kARGB_4444_Config:
45 info->format = ANDROID_BITMAP_FORMAT_RGBA_4444;
46 break;
47 case SkBitmap::kA8_Config:
48 info->format = ANDROID_BITMAP_FORMAT_A_8;
49 break;
50 default:
51 info->format = ANDROID_BITMAP_FORMAT_NONE;
52 break;
53 }
54 }
55 return ANDROID_BITMAP_RESULT_SUCCESS;
56 }
57
AndroidBitmap_lockPixels(JNIEnv * env,jobject jbitmap,void ** addrPtr)58 int AndroidBitmap_lockPixels(JNIEnv* env, jobject jbitmap, void** addrPtr) {
59 if (NULL == env || NULL == jbitmap) {
60 return ANDROID_BITMAP_RESULT_BAD_PARAMETER;
61 }
62
63 SkBitmap* bm = GraphicsJNI::getNativeBitmap(env, jbitmap);
64 if (NULL == bm) {
65 return ANDROID_BITMAP_RESULT_JNI_EXCEPTION;
66 }
67
68 bm->lockPixels();
69 void* addr = bm->getPixels();
70 if (NULL == addr) {
71 bm->unlockPixels();
72 return ANDROID_BITMAP_RESULT_ALLOCATION_FAILED;
73 }
74
75 if (addrPtr) {
76 *addrPtr = addr;
77 }
78 return ANDROID_BITMAP_RESULT_SUCCESS;
79 }
80
AndroidBitmap_unlockPixels(JNIEnv * env,jobject jbitmap)81 int AndroidBitmap_unlockPixels(JNIEnv* env, jobject jbitmap) {
82 if (NULL == env || NULL == jbitmap) {
83 return ANDROID_BITMAP_RESULT_BAD_PARAMETER;
84 }
85
86 SkBitmap* bm = GraphicsJNI::getNativeBitmap(env, jbitmap);
87 if (NULL == bm) {
88 return ANDROID_BITMAP_RESULT_JNI_EXCEPTION;
89 }
90
91 // notifyPixelsChanged() needs be called to apply writes to GL-backed
92 // bitmaps. Note that this will slow down read-only accesses to the
93 // bitmaps, but the NDK methods are primarily intended to be used for
94 // writes.
95 bm->notifyPixelsChanged();
96
97 bm->unlockPixels();
98 return ANDROID_BITMAP_RESULT_SUCCESS;
99 }
100
101