| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <android/bitmap.h> |
| #include <jni.h> |
| |
| #include "utils.h" |
| #include "_jni.h" |
| |
| using android::apps::photoeditor::utils::LockBitmaps; |
| using android::apps::photoeditor::utils::pixel32_t; |
| using android::apps::photoeditor::utils::UnlockBitmaps; |
| |
| namespace { |
| |
| extern "C" JNIEXPORT void JNICALL Java_com_android_photoeditor_filters_ImageUtils_nativeTint( |
| JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, jint tint) { |
| pTintType f = (pTintType)JNIFunc[JNI_Tint].func_ptr; |
| return f(env, obj, src_bitmap, dst_bitmap, tint); |
| } |
| |
| extern "C" void Tint( |
| JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, jint tint) { |
| AndroidBitmapInfo src_info; |
| AndroidBitmapInfo dst_info; |
| void* src_pixels; |
| void* dst_pixels; |
| |
| int ret = LockBitmaps( |
| env, src_bitmap, dst_bitmap, &src_info, &dst_info, &src_pixels, &dst_pixels); |
| if (ret < 0) { |
| LOGE("LockBitmaps in Tint failed, error=%d", ret); |
| return; |
| } |
| |
| const int kShiftBits = 10; |
| const int kRedRatio = static_cast<int>(0.8f * (1 << kShiftBits) * 0.21f); |
| const int kGreenRatio = static_cast<int>(0.8f * (1 << kShiftBits) * 0.71f); |
| const int kBlueRatio = static_cast<int>(0.8f * (1 << kShiftBits) * 0.07f); |
| const int kTintRatio = static_cast<int>(0.2f * (1 << kShiftBits)); |
| |
| uint32_t tint_red = kTintRatio * ((tint >> 16) & 0xff); |
| uint32_t tint_green = kTintRatio * ((tint >> 8) & 0xff); |
| uint32_t tint_blue = kTintRatio * (tint & 0xff); |
| |
| for (uint32_t scan_line = 0; scan_line < dst_info.height; scan_line++) { |
| uint32_t* dst = reinterpret_cast<uint32_t*>(dst_pixels); |
| pixel32_t* src = reinterpret_cast<pixel32_t*>(src_pixels); |
| pixel32_t* src_line_end = src + src_info.width; |
| while (src < src_line_end) { |
| int32_t avg = kRedRatio * src->rgba8[0] + kGreenRatio * src->rgba8[1] + |
| kBlueRatio * src->rgba8[2]; |
| |
| int32_t dst_red = (avg + tint_red) >> kShiftBits; |
| int32_t dst_green = (avg + tint_green) >> kShiftBits; |
| int32_t dst_blue = (avg + tint_blue) >> kShiftBits; |
| |
| if (dst_red > 255) { |
| dst_red = 255; |
| } |
| if (dst_green > 255) { |
| dst_green = 255; |
| } |
| if (dst_blue > 255) { |
| dst_blue = 255; |
| } |
| |
| *dst = (src->rgba8[3] << 24) | (dst_blue << 16) | (dst_green << 8) | dst_red; |
| dst++; |
| src++; |
| } |
| dst_pixels = reinterpret_cast<char*>(dst_pixels) + dst_info.stride; |
| src_pixels = reinterpret_cast<char*>(src_pixels) + src_info.stride; |
| } |
| |
| UnlockBitmaps(env, src_bitmap, dst_bitmap); |
| } |
| |
| } // namespace |