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 #ifndef ANDROID_BITMAP_H 18 #define ANDROID_BITMAP_H 19 20 #include <sys/cdefs.h> 21 #include <stdint.h> 22 #include <jni.h> 23 24 __BEGIN_DECLS 25 26 #define ANDROID_BITMAP_RESUT_SUCCESS 0 27 #define ANDROID_BITMAP_RESULT_BAD_PARAMETER -1 28 #define ANDROID_BITMAP_RESULT_JNI_EXCEPTION -2 29 #define ANDROID_BITMAP_RESULT_ALLOCATION_FAILED -3 30 31 enum AndroidBitmapFormat { 32 ANDROID_BITMAP_FORMAT_NONE = 0, 33 ANDROID_BITMAP_FORMAT_RGBA_8888 = 1, 34 ANDROID_BITMAP_FORMAT_RGB_565 = 4, 35 ANDROID_BITMAP_FORMAT_RGBA_4444 = 7, 36 ANDROID_BITMAP_FORMAT_A_8 = 8, 37 }; 38 39 typedef struct { 40 uint32_t width; 41 uint32_t height; 42 uint32_t stride; 43 int32_t format; 44 uint32_t flags; // 0 for now 45 } AndroidBitmapInfo; 46 47 /** 48 * Given a java bitmap object, fill out the AndroidBitmap struct for it. 49 * If the call fails, the info parameter will be ignored 50 */ 51 int AndroidBitmap_getInfo(JNIEnv* env, jobject jbitmap, 52 AndroidBitmapInfo* info); 53 54 /** 55 * Given a java bitmap object, attempt to lock the pixel address. 56 * Locking will ensure that the memory for the pixels will not move 57 * until the unlockPixels call, and ensure that, if the pixels had been 58 * previously purged, they will have been restored. 59 * 60 * If this call succeeds, it must be balanced by a call to 61 * AndroidBitmap_unlockPixels, after which time the address of the pixels should 62 * no longer be used. 63 * 64 * If this succeeds, *addrPtr will be set to the pixel address. If the call 65 * fails, addrPtr will be ignored. 66 */ 67 int AndroidBitmap_lockPixels(JNIEnv* env, jobject jbitmap, void** addrPtr); 68 69 /** 70 * Call this to balanace a successful call to AndroidBitmap_lockPixels 71 */ 72 int AndroidBitmap_unlockPixels(JNIEnv* env, jobject jbitmap); 73 74 __END_DECLS 75 76 #endif /* ANDROID_BITMAP_H */ 77