/* * 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 <cstdlib> #include "utils.h" using android::apps::photoeditor::utils::clamp; using android::apps::photoeditor::utils::LockBitmaps; using android::apps::photoeditor::utils::pixel32_t; using android::apps::photoeditor::utils::UnlockBitmaps; namespace android { namespace apps { namespace photoeditor { namespace convolution { /* * Used for convolution of following kernel: * n n n * n c n * n n n * n: neighbor, c: center */ void SpecialConvolution(AndroidBitmapInfo *src_info, AndroidBitmapInfo *dst_info, void *src_pixels, void *dst_pixels, float neighbor) { if (neighbor == 0) { memcpy(dst_pixels, src_pixels, src_info->stride * src_info->height); return; } /* Copy the first row to dst_pixels */ memcpy(dst_pixels, src_pixels, src_info->stride); src_pixels = reinterpret_cast<char*>(src_pixels) + src_info->stride; dst_pixels = reinterpret_cast<char*>(dst_pixels) + dst_info->stride; const int32_t kShiftBits = 10; int32_t fixed_neighbor = static_cast<int32_t>((1 << kShiftBits) * neighbor); int32_t fixed_center = static_cast<int32_t>((1 << kShiftBits) * (1 - neighbor * 8)); for (uint32_t scan_line = 1; scan_line < dst_info->height - 1; scan_line++) { pixel32_t* src = reinterpret_cast<pixel32_t*>(src_pixels); uint32_t* src_prev = reinterpret_cast<uint32_t*> (reinterpret_cast<char*>(src_pixels) - src_info->stride); uint32_t* src_next = reinterpret_cast<uint32_t*> (reinterpret_cast<char*>(src_pixels) + src_info->stride); uint32_t* dst = reinterpret_cast<uint32_t*>(dst_pixels); *dst++ = src->rgba32; src++; src_prev++; src_next++; uint32_t* dst_line_end = dst + dst_info->width - 1; while (dst < dst_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]; uint8_t* n1 = reinterpret_cast<uint8_t*>(src_prev - 1); uint8_t* n2 = reinterpret_cast<uint8_t*>(src - 1); uint8_t* n3 = reinterpret_cast<uint8_t*>(src_next - 1); uint8_t* n4 = reinterpret_cast<uint8_t*>(src_prev); uint8_t* n5 = reinterpret_cast<uint8_t*>(src_next); uint8_t* n6 = reinterpret_cast<uint8_t*>(src_prev + 1); uint8_t* n7 = reinterpret_cast<uint8_t*>(src + 1); uint8_t* n8 = reinterpret_cast<uint8_t*>(src_next + 1); int32_t red = n1[0] + n2[0] + n3[0] + n4[0] + n5[0] + n6[0] + n7[0] + n8[0]; int32_t green = n1[1] + n2[1] + n3[1] + n4[1] + n5[1] + n6[1] + n7[1] + n8[1]; int32_t blue = n1[2] + n2[2] + n3[2] + n4[2] + n5[2] + n6[2] + n7[2] + n8[2]; red = (fixed_neighbor * red + fixed_center * src_red) >> kShiftBits; green = (fixed_neighbor * green + fixed_center * src_green) >> kShiftBits; blue = (fixed_neighbor * blue + fixed_center * src_blue) >> kShiftBits; red = clamp(red, 0, 255); green = clamp(green, 0, 255); blue = clamp(blue, 0, 255); *dst = (src_alpha << 24) | (blue << 16) | (green << 8) | red; dst++; src++; src_prev++; src_next++; } *dst = src->rgba32; src_pixels = reinterpret_cast<char*>(src_pixels) + src_info->stride; dst_pixels = reinterpret_cast<char*>(dst_pixels) + dst_info->stride; } /* Copy the last row to dst_pixels */ memcpy(dst_pixels, src_pixels, src_info->stride); } } // namespace convolution } // namespace photoeditor } // namespace apps } // namespace android