| // Copyright 2014 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "core/fxcodec/fx_codec.h" |
| |
| #include <algorithm> |
| #include <utility> |
| |
| #include "core/fxcrt/fx_memory.h" |
| #include "core/fxge/dib/fx_dib.h" |
| |
| namespace fxcodec { |
| |
| #ifdef PDF_ENABLE_XFA |
| CFX_DIBAttribute::CFX_DIBAttribute() = default; |
| |
| CFX_DIBAttribute::~CFX_DIBAttribute() { |
| for (const auto& pair : m_Exif) |
| FX_Free(pair.second); |
| } |
| #endif // PDF_ENABLE_XFA |
| |
| void ReverseRGB(uint8_t* pDestBuf, const uint8_t* pSrcBuf, int pixels) { |
| if (pDestBuf == pSrcBuf) { |
| for (int i = 0; i < pixels; i++) { |
| std::swap(pDestBuf[0], pDestBuf[2]); |
| pDestBuf += 3; |
| } |
| } else { |
| for (int i = 0; i < pixels; i++) { |
| ReverseCopy3Bytes(pDestBuf, pSrcBuf); |
| pDestBuf += 3; |
| pSrcBuf += 3; |
| } |
| } |
| } |
| |
| FX_SAFE_UINT32 CalculatePitch8(uint32_t bpc, uint32_t components, int width) { |
| FX_SAFE_UINT32 pitch = bpc; |
| pitch *= components; |
| pitch *= width; |
| pitch += 7; |
| pitch /= 8; |
| return pitch; |
| } |
| |
| FX_SAFE_UINT32 CalculatePitch32(int bpp, int width) { |
| FX_SAFE_UINT32 pitch = bpp; |
| pitch *= width; |
| pitch += 31; |
| pitch /= 32; // quantized to number of 32-bit words. |
| pitch *= 4; // and then back to bytes, (not just /8 in one step). |
| return pitch; |
| } |
| |
| } // namespace fxcodec |