10f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh/* 20f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * Copyright (C) 2010 The Android Open Source Project 30f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * 40f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * Licensed under the Apache License, Version 2.0 (the "License"); 50f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * you may not use this file except in compliance with the License. 60f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * You may obtain a copy of the License at 70f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * 80f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * http://www.apache.org/licenses/LICENSE-2.0 90f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * 100f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * Unless required by applicable law or agreed to in writing, software 110f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * distributed under the License is distributed on an "AS IS" BASIS, 120f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 130f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * See the License for the specific language governing permissions and 140f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh * limitations under the License. 150f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh */ 160f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 170f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh#include <android/bitmap.h> 180f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh#include <jni.h> 190f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 200f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh#include "utils.h" 210f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh#include "_jni.h" 220f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 230f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsiehusing android::apps::photoeditor::utils::LockBitmaps; 240f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsiehusing android::apps::photoeditor::utils::pixel32_t; 250f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsiehusing android::apps::photoeditor::utils::UnlockBitmaps; 260f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 270f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsiehnamespace { 280f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 290f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsiehextern "C" JNIEXPORT void JNICALL Java_com_android_photoeditor_filters_ImageUtils_nativeGrayscale( 300f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, jfloat scale) { 310f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh pGrayscaleType f = (pGrayscaleType)JNIFunc[JNI_Grayscale].func_ptr; 320f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh return f(env, obj, src_bitmap, dst_bitmap, scale); 330f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh} 340f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 350f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsiehextern "C" void Grayscale( 360f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, jfloat scale) { 370f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh AndroidBitmapInfo src_info; 380f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh AndroidBitmapInfo dst_info; 390f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh void* src_pixels; 400f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh void* dst_pixels; 410f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 420f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh int ret = LockBitmaps( 430f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh env, src_bitmap, dst_bitmap, &src_info, &dst_info, &src_pixels, &dst_pixels); 440f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh if (ret < 0) { 450f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh LOGE("LockBitmaps in GrayScale failed, error=%d", ret); 460f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh return; 470f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh } 480f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 490f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh const int kShiftBits = 20; 500f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh const int32_t kRedRatio = static_cast<int32_t>((1 << kShiftBits) * 0.21f); 510f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh const int32_t kGreenRatio = static_cast<int32_t>((1 << kShiftBits) * 0.71f); 520f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh const int32_t kBlueRatio = static_cast<int32_t>((1 << kShiftBits) * 0.07f); 530f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 540f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh for (uint32_t scan_line = 0; scan_line < dst_info.height; scan_line++) { 550f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh uint32_t* dst = reinterpret_cast<uint32_t*>(dst_pixels); 560f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh pixel32_t* src = reinterpret_cast<pixel32_t*>(src_pixels); 570f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh pixel32_t* src_line_end = src + src_info.width; 580f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh while (src < src_line_end) { 590f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh int32_t src_red = src->rgba8[0]; 600f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh int32_t src_green = src->rgba8[1]; 610f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh int32_t src_blue = src->rgba8[2]; 620f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh int32_t src_alpha = src->rgba8[3]; 630f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 640f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh int32_t dst_color = (kRedRatio * src_red + kGreenRatio * src_green + 650f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh kBlueRatio * src_blue) >> kShiftBits; 660f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh if (dst_color > 255) { 670f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh dst_color = 255; 680f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh } 690f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh *dst = (src_alpha << 24) | (dst_color << 16) | (dst_color << 8) | dst_color; 700f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh dst++; 710f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh src++; 720f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh } 730f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh dst_pixels = reinterpret_cast<char*>(dst_pixels) + dst_info.stride; 740f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh src_pixels = reinterpret_cast<char*>(src_pixels) + src_info.stride; 750f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh } 760f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 770f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh UnlockBitmaps(env, src_bitmap, dst_bitmap); 780f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh} 790f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh 800f8a40e4cfdc5f6cd47c22e81f69ed0446067c54Andrew Hsieh} // namespace 81