1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef CORE_FXCODEC_JBIG2_JBIG2_IMAGE_H_ 8 #define CORE_FXCODEC_JBIG2_JBIG2_IMAGE_H_ 9 10 #include <memory> 11 12 #include "core/fxcodec/jbig2/JBig2_Define.h" 13 #include "core/fxcrt/fx_memory_wrappers.h" 14 #include "core/fxcrt/maybe_owned.h" 15 16 struct FX_RECT; 17 18 enum JBig2ComposeOp { 19 JBIG2_COMPOSE_OR = 0, 20 JBIG2_COMPOSE_AND = 1, 21 JBIG2_COMPOSE_XOR = 2, 22 JBIG2_COMPOSE_XNOR = 3, 23 JBIG2_COMPOSE_REPLACE = 4 24 }; 25 26 class CJBig2_Image { 27 public: 28 CJBig2_Image(int32_t w, int32_t h); 29 CJBig2_Image(int32_t w, int32_t h, int32_t stride, uint8_t* pBuf); 30 CJBig2_Image(const CJBig2_Image& other); 31 ~CJBig2_Image(); 32 33 static bool IsValidImageSize(int32_t w, int32_t h); 34 width()35 int32_t width() const { return m_nWidth; } height()36 int32_t height() const { return m_nHeight; } stride()37 int32_t stride() const { return m_nStride; } 38 data()39 uint8_t* data() const { return m_pData.Get(); } 40 41 int GetPixel(int32_t x, int32_t y) const; 42 void SetPixel(int32_t x, int32_t y, int v); 43 GetLineUnsafe(int32_t y)44 uint8_t* GetLineUnsafe(int32_t y) const { return data() + y * m_nStride; } GetLine(int32_t y)45 uint8_t* GetLine(int32_t y) const { 46 return (y >= 0 && y < m_nHeight) ? GetLineUnsafe(y) : nullptr; 47 } 48 49 void CopyLine(int32_t hTo, int32_t hFrom); 50 void Fill(bool v); 51 52 bool ComposeFrom(int32_t x, int32_t y, CJBig2_Image* pSrc, JBig2ComposeOp op); 53 bool ComposeFromWithRect(int32_t x, 54 int32_t y, 55 CJBig2_Image* pSrc, 56 const FX_RECT& rtSrc, 57 JBig2ComposeOp op); 58 59 std::unique_ptr<CJBig2_Image> SubImage(int32_t x, 60 int32_t y, 61 int32_t w, 62 int32_t h); 63 void Expand(int32_t h, bool v); 64 65 bool ComposeTo(CJBig2_Image* pDst, int32_t x, int32_t y, JBig2ComposeOp op); 66 bool ComposeToWithRect(CJBig2_Image* pDst, 67 int32_t x, 68 int32_t y, 69 const FX_RECT& rtSrc, 70 JBig2ComposeOp op); 71 72 private: 73 void SubImageFast(int32_t x, 74 int32_t y, 75 int32_t w, 76 int32_t h, 77 CJBig2_Image* pImage); 78 void SubImageSlow(int32_t x, 79 int32_t y, 80 int32_t w, 81 int32_t h, 82 CJBig2_Image* pImage); 83 bool ComposeToInternal(CJBig2_Image* pDst, 84 int32_t x, 85 int32_t y, 86 JBig2ComposeOp op, 87 const FX_RECT& rtSrc); 88 89 MaybeOwned<uint8_t, FxFreeDeleter> m_pData; 90 int32_t m_nWidth = 0; // 1-bit pixels 91 int32_t m_nHeight = 0; // lines 92 int32_t m_nStride = 0; // bytes, must be multiple of 4. 93 }; 94 95 #endif // CORE_FXCODEC_JBIG2_JBIG2_IMAGE_H_ 96