| /* |
| * 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 { |
| |
| const int k256Multiply255 = 65280; |
| |
| /* |
| * @param scale ranges from -0.5 to 0.5. |
| */ |
| extern "C" JNIEXPORT void JNICALL Java_com_android_photoeditor_filters_ImageUtils_nativeColorTemp( |
| JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, jfloat scale) { |
| pColorTempType f = (pColorTempType)JNIFunc[JNI_ColorTemp].func_ptr; |
| return f(env, obj, src_bitmap, dst_bitmap, scale); |
| } |
| |
| extern "C" void ColorTemp( |
| JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, jfloat scale) { |
| 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 ColorTemp failed, error=%d", ret); |
| return; |
| } |
| |
| int curve[256]; |
| for (int i = 0; i < 256; i++) { |
| curve[i] = i * (256 - i); |
| } |
| |
| int ics = static_cast<int>(scale * 256); |
| int icsr = ics; |
| int icsg = ics > 0 ? ics : 0; |
| int icsb = ics; |
| |
| 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 src_red = src->rgba8[0]; |
| int32_t src_green = src->rgba8[1]; |
| int32_t src_blue = src->rgba8[2]; |
| int32_t src_alpha = src->rgba8[3]; |
| |
| int32_t dst_red = src_red + ((curve[src_red] * icsr) >> 15); |
| int32_t dst_green = src_green + ((curve[src_green] * icsg) >> 17); |
| int32_t dst_blue = src_blue - ((curve[src_blue] * icsb) >> 15); |
| |
| int rgb_max = MAX3(dst_red, dst_green, dst_blue); |
| if (rgb_max > 255) { |
| int invmax = k256Multiply255 / rgb_max; |
| dst_red = dst_red * invmax >> 8; |
| dst_green = dst_green * invmax >> 8; |
| dst_blue = dst_blue * invmax >> 8; |
| } |
| |
| *dst = (src_alpha << 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 |