1 /* 2 * Copyright (C) 2010 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 <jni.h> 19 20 #include <cmath> 21 #include <cstdlib> 22 23 #include "utils.h" 24 #include "_jni.h" 25 26 using android::apps::photoeditor::utils::LockBitmaps; 27 using android::apps::photoeditor::utils::pixel32_t; 28 using android::apps::photoeditor::utils::UnlockBitmaps; 29 30 namespace { 31 32 extern "C" JNIEXPORT void JNICALL Java_com_android_photoeditor_filters_ImageUtils_nativeQuantize( 33 JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap) { 34 pQuantizeType f = (pQuantizeType)JNIFunc[JNI_Quantize].func_ptr; 35 return f(env, obj, src_bitmap, dst_bitmap); 36 } 37 38 extern "C" void Quantize( 39 JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap) { 40 AndroidBitmapInfo src_info; 41 AndroidBitmapInfo dst_info; 42 void* src_pixels; 43 void* dst_pixels; 44 45 int ret = LockBitmaps( 46 env, src_bitmap, dst_bitmap, &src_info, &dst_info, &src_pixels, &dst_pixels); 47 if (ret < 0) { 48 LOGE("LockBitmaps in quantize failed, error=%d", ret); 49 return; 50 } 51 52 uint8_t quantize_map[256]; 53 54 for (uint32_t i = 0; i < 256; i++) { 55 quantize_map[i] = i / 128 * 128 + 64; 56 } 57 58 for (uint32_t scan_line = 0; scan_line < src_info.height; scan_line++) { 59 pixel32_t* src = reinterpret_cast<pixel32_t*>(src_pixels); 60 pixel32_t* dst = reinterpret_cast<pixel32_t*>(dst_pixels); 61 62 pixel32_t* src_line_end = src + src_info.width; 63 while (src < src_line_end) { 64 dst->rgba8[0] = quantize_map[src->rgba8[0]]; 65 dst->rgba8[1] = quantize_map[src->rgba8[1]]; 66 dst->rgba8[2] = quantize_map[src->rgba8[2]]; 67 dst->rgba8[3] = src->rgba8[3]; 68 dst++; 69 src++; 70 } 71 dst_pixels = reinterpret_cast<char*>(dst_pixels) + dst_info.stride; 72 src_pixels = reinterpret_cast<char*>(src_pixels) + src_info.stride; 73 } 74 75 UnlockBitmaps(env, src_bitmap, dst_bitmap); 76 } 77 78 } // namespace 79
