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 <stdint.h> 21 #include <jni.h> 22 23 #ifdef __cplusplus 24 extern "C" { 25 #endif 26 27 #define ANDROID_BITMAP_RESUT_SUCCESS 0 28 #define ANDROID_BITMAP_RESULT_BAD_PARAMETER -1 29 #define ANDROID_BITMAP_RESULT_JNI_EXCEPTION -2 30 #define ANDROID_BITMAP_RESULT_ALLOCATION_FAILED -3 31 32 enum AndroidBitmapFormat { 33 ANDROID_BITMAP_FORMAT_NONE = 0, 34 ANDROID_BITMAP_FORMAT_RGBA_8888 = 1, 35 ANDROID_BITMAP_FORMAT_RGB_565 = 4, 36 ANDROID_BITMAP_FORMAT_RGBA_4444 = 7, 37 ANDROID_BITMAP_FORMAT_A_8 = 8, 38 }; 39 40 typedef struct { 41 uint32_t width; 42 uint32_t height; 43 uint32_t stride; 44 int32_t format; 45 uint32_t flags; // 0 for now 46 } AndroidBitmapInfo; 47 48 /** 49 * Given a java bitmap object, fill out the AndroidBitmap struct for it. 50 * If the call fails, the info parameter will be ignored 51 */ 52 int AndroidBitmap_getInfo(JNIEnv* env, jobject jbitmap, 53 AndroidBitmapInfo* info); 54 55 /** 56 * Given a java bitmap object, attempt to lock the pixel address. 57 * Locking will ensure that the memory for the pixels will not move 58 * until the unlockPixels call, and ensure that, if the pixels had been 59 * previously purged, they will have been restored. 60 * 61 * If this call succeeds, it must be balanced by a call to 62 * AndroidBitmap_unlockPixels, after which time the address of the pixels should 63 * no longer be used. 64 * 65 * If this succeeds, *addrPtr will be set to the pixel address. If the call 66 * fails, addrPtr will be ignored. 67 */ 68 int AndroidBitmap_lockPixels(JNIEnv* env, jobject jbitmap, void** addrPtr); 69 70 /** 71 * Call this to balanace a successful call to AndroidBitmap_lockPixels 72 */ 73 int AndroidBitmap_unlockPixels(JNIEnv* env, jobject jbitmap); 74 75 #ifdef __cplusplus 76 } 77 #endif 78 79 #endif 80