| // 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/include/fpdfapi/fpdf_module.h" |
| #include "core/include/fpdfapi/fpdf_page.h" |
| #include "core/include/fpdfapi/fpdf_render.h" |
| #include "core/include/fxcodec/fx_codec.h" |
| #include "core/src/fpdfapi/fpdf_page/pageint.h" |
| #include "core/src/fpdfapi/fpdf_render/render_int.h" |
| |
| CPDF_Dictionary* CPDF_Image::InitJPEG(uint8_t* pData, FX_DWORD size) { |
| int32_t width; |
| int32_t height; |
| int32_t num_comps; |
| int32_t bits; |
| FX_BOOL color_trans; |
| if (!CPDF_ModuleMgr::Get()->GetJpegModule()->LoadInfo( |
| pData, size, width, height, num_comps, bits, color_trans)) { |
| return NULL; |
| } |
| CPDF_Dictionary* pDict = new CPDF_Dictionary; |
| pDict->SetAtName("Type", "XObject"); |
| pDict->SetAtName("Subtype", "Image"); |
| pDict->SetAtInteger("Width", width); |
| pDict->SetAtInteger("Height", height); |
| const FX_CHAR* csname = NULL; |
| if (num_comps == 1) { |
| csname = "DeviceGray"; |
| } else if (num_comps == 3) { |
| csname = "DeviceRGB"; |
| } else if (num_comps == 4) { |
| csname = "DeviceCMYK"; |
| CPDF_Array* pDecode = new CPDF_Array; |
| for (int n = 0; n < 4; n++) { |
| pDecode->AddInteger(1); |
| pDecode->AddInteger(0); |
| } |
| pDict->SetAt("Decode", pDecode); |
| } |
| pDict->SetAtName("ColorSpace", csname); |
| pDict->SetAtInteger("BitsPerComponent", bits); |
| pDict->SetAtName("Filter", "DCTDecode"); |
| if (!color_trans) { |
| CPDF_Dictionary* pParms = new CPDF_Dictionary; |
| pDict->SetAt("DecodeParms", pParms); |
| pParms->SetAtInteger("ColorTransform", 0); |
| } |
| m_bIsMask = FALSE; |
| m_Width = width; |
| m_Height = height; |
| if (!m_pStream) { |
| m_pStream = new CPDF_Stream(NULL, 0, NULL); |
| } |
| return pDict; |
| } |
| void CPDF_Image::SetJpegImage(uint8_t* pData, FX_DWORD size) { |
| CPDF_Dictionary* pDict = InitJPEG(pData, size); |
| if (!pDict) { |
| return; |
| } |
| m_pStream->InitStream(pData, size, pDict); |
| } |
| void CPDF_Image::SetJpegImage(IFX_FileRead* pFile) { |
| FX_DWORD size = (FX_DWORD)pFile->GetSize(); |
| if (!size) { |
| return; |
| } |
| FX_DWORD dwEstimateSize = size; |
| if (dwEstimateSize > 8192) { |
| dwEstimateSize = 8192; |
| } |
| uint8_t* pData = FX_Alloc(uint8_t, dwEstimateSize); |
| pFile->ReadBlock(pData, 0, dwEstimateSize); |
| CPDF_Dictionary* pDict = InitJPEG(pData, dwEstimateSize); |
| FX_Free(pData); |
| if (!pDict && size > dwEstimateSize) { |
| pData = FX_Alloc(uint8_t, size); |
| pFile->ReadBlock(pData, 0, size); |
| pDict = InitJPEG(pData, size); |
| FX_Free(pData); |
| } |
| if (!pDict) { |
| return; |
| } |
| m_pStream->InitStreamFromFile(pFile, pDict); |
| } |
| void _DCTEncodeBitmap(CPDF_Dictionary* pBitmapDict, |
| const CFX_DIBitmap* pBitmap, |
| int quality, |
| uint8_t*& buf, |
| FX_STRSIZE& size) {} |
| void _JBIG2EncodeBitmap(CPDF_Dictionary* pBitmapDict, |
| const CFX_DIBitmap* pBitmap, |
| CPDF_Document* pDoc, |
| uint8_t*& buf, |
| FX_STRSIZE& size, |
| FX_BOOL bLossLess) {} |
| void CPDF_Image::SetImage(const CFX_DIBitmap* pBitmap, |
| int32_t iCompress, |
| IFX_FileWrite* pFileWrite, |
| IFX_FileRead* pFileRead, |
| const CFX_DIBitmap* pMask, |
| const CPDF_ImageSetParam* pParam) { |
| int32_t BitmapWidth = pBitmap->GetWidth(); |
| int32_t BitmapHeight = pBitmap->GetHeight(); |
| if (BitmapWidth < 1 || BitmapHeight < 1) { |
| return; |
| } |
| uint8_t* src_buf = pBitmap->GetBuffer(); |
| int32_t src_pitch = pBitmap->GetPitch(); |
| int32_t bpp = pBitmap->GetBPP(); |
| FX_BOOL bUseMatte = |
| pParam && pParam->pMatteColor && (pBitmap->GetFormat() == FXDIB_Argb); |
| CPDF_Dictionary* pDict = new CPDF_Dictionary; |
| pDict->SetAtName("Type", "XObject"); |
| pDict->SetAtName("Subtype", "Image"); |
| pDict->SetAtInteger("Width", BitmapWidth); |
| pDict->SetAtInteger("Height", BitmapHeight); |
| uint8_t* dest_buf = NULL; |
| FX_STRSIZE dest_pitch = 0, dest_size = 0, opType = -1; |
| if (bpp == 1) { |
| int32_t reset_a = 0, reset_r = 0, reset_g = 0, reset_b = 0; |
| int32_t set_a = 0, set_r = 0, set_g = 0, set_b = 0; |
| if (!pBitmap->IsAlphaMask()) { |
| ArgbDecode(pBitmap->GetPaletteArgb(0), reset_a, reset_r, reset_g, |
| reset_b); |
| ArgbDecode(pBitmap->GetPaletteArgb(1), set_a, set_r, set_g, set_b); |
| } |
| if (set_a == 0 || reset_a == 0) { |
| pDict->SetAt("ImageMask", new CPDF_Boolean(TRUE)); |
| if (reset_a == 0) { |
| CPDF_Array* pArray = new CPDF_Array; |
| pArray->AddInteger(1); |
| pArray->AddInteger(0); |
| pDict->SetAt("Decode", pArray); |
| } |
| } else { |
| CPDF_Array* pCS = new CPDF_Array; |
| pCS->AddName("Indexed"); |
| pCS->AddName("DeviceRGB"); |
| pCS->AddInteger(1); |
| CFX_ByteString ct; |
| FX_CHAR* pBuf = ct.GetBuffer(6); |
| pBuf[0] = (FX_CHAR)reset_r; |
| pBuf[1] = (FX_CHAR)reset_g; |
| pBuf[2] = (FX_CHAR)reset_b; |
| pBuf[3] = (FX_CHAR)set_r; |
| pBuf[4] = (FX_CHAR)set_g; |
| pBuf[5] = (FX_CHAR)set_b; |
| ct.ReleaseBuffer(6); |
| pCS->Add(new CPDF_String(ct, TRUE)); |
| pDict->SetAt("ColorSpace", pCS); |
| } |
| pDict->SetAtInteger("BitsPerComponent", 1); |
| dest_pitch = (BitmapWidth + 7) / 8; |
| if ((iCompress & 0x03) == PDF_IMAGE_NO_COMPRESS) { |
| opType = 1; |
| } else { |
| opType = 0; |
| } |
| } else if (bpp == 8) { |
| int32_t iPalette = pBitmap->GetPaletteSize(); |
| if (iPalette > 0) { |
| CPDF_Array* pCS = new CPDF_Array; |
| m_pDocument->AddIndirectObject(pCS); |
| pCS->AddName("Indexed"); |
| pCS->AddName("DeviceRGB"); |
| pCS->AddInteger(iPalette - 1); |
| uint8_t* pColorTable = FX_Alloc2D(uint8_t, iPalette, 3); |
| uint8_t* ptr = pColorTable; |
| for (int32_t i = 0; i < iPalette; i++) { |
| FX_DWORD argb = pBitmap->GetPaletteArgb(i); |
| ptr[0] = (uint8_t)(argb >> 16); |
| ptr[1] = (uint8_t)(argb >> 8); |
| ptr[2] = (uint8_t)argb; |
| ptr += 3; |
| } |
| CPDF_Stream* pCTS = |
| new CPDF_Stream(pColorTable, iPalette * 3, new CPDF_Dictionary); |
| m_pDocument->AddIndirectObject(pCTS); |
| pCS->AddReference(m_pDocument, pCTS); |
| pDict->SetAtReference("ColorSpace", m_pDocument, pCS); |
| } else { |
| pDict->SetAtName("ColorSpace", "DeviceGray"); |
| } |
| pDict->SetAtInteger("BitsPerComponent", 8); |
| if ((iCompress & 0x03) == PDF_IMAGE_NO_COMPRESS) { |
| dest_pitch = BitmapWidth; |
| opType = 1; |
| } else { |
| opType = 0; |
| } |
| } else { |
| pDict->SetAtName("ColorSpace", "DeviceRGB"); |
| pDict->SetAtInteger("BitsPerComponent", 8); |
| if ((iCompress & 0x03) == PDF_IMAGE_NO_COMPRESS) { |
| dest_pitch = BitmapWidth * 3; |
| opType = 2; |
| } else { |
| opType = 0; |
| } |
| } |
| const CFX_DIBitmap* pMaskBitmap = NULL; |
| FX_BOOL bDeleteMask = FALSE; |
| if (pBitmap->HasAlpha()) { |
| pMaskBitmap = pBitmap->GetAlphaMask(); |
| bDeleteMask = TRUE; |
| } |
| if (!pMaskBitmap && pMask) { |
| FXDIB_Format maskFormat = pMask->GetFormat(); |
| if (maskFormat == FXDIB_1bppMask || maskFormat == FXDIB_8bppMask) { |
| pMaskBitmap = pMask; |
| } |
| } |
| if (pMaskBitmap) { |
| int32_t maskWidth = pMaskBitmap->GetWidth(); |
| int32_t maskHeight = pMaskBitmap->GetHeight(); |
| uint8_t* mask_buf = NULL; |
| FX_STRSIZE mask_size = 0; |
| CPDF_Dictionary* pMaskDict = new CPDF_Dictionary; |
| pMaskDict->SetAtName("Type", "XObject"); |
| pMaskDict->SetAtName("Subtype", "Image"); |
| pMaskDict->SetAtInteger("Width", maskWidth); |
| pMaskDict->SetAtInteger("Height", maskHeight); |
| pMaskDict->SetAtName("ColorSpace", "DeviceGray"); |
| pMaskDict->SetAtInteger("BitsPerComponent", 8); |
| if (pMaskBitmap->GetBPP() == 8 && |
| (iCompress & PDF_IMAGE_MASK_LOSSY_COMPRESS) != 0) { |
| _DCTEncodeBitmap(pMaskDict, pMaskBitmap, pParam ? pParam->nQuality : 75, |
| mask_buf, mask_size); |
| } else if (pMaskBitmap->GetFormat() == FXDIB_1bppMask) { |
| _JBIG2EncodeBitmap(pMaskDict, pMaskBitmap, m_pDocument, mask_buf, |
| mask_size, TRUE); |
| } else { |
| mask_buf = FX_Alloc2D(uint8_t, maskHeight, maskWidth); |
| mask_size = maskHeight * maskWidth; // Safe since checked alloc returned. |
| for (int32_t a = 0; a < maskHeight; a++) { |
| FXSYS_memcpy(mask_buf + a * maskWidth, pMaskBitmap->GetScanline(a), |
| maskWidth); |
| } |
| } |
| pMaskDict->SetAtInteger("Length", mask_size); |
| if (bUseMatte) { |
| int a, r, g, b; |
| ArgbDecode(*(pParam->pMatteColor), a, r, g, b); |
| CPDF_Array* pMatte = new CPDF_Array; |
| pMatte->AddInteger(r); |
| pMatte->AddInteger(g); |
| pMatte->AddInteger(b); |
| pMaskDict->SetAt("Matte", pMatte); |
| } |
| CPDF_Stream* pMaskStream = new CPDF_Stream(mask_buf, mask_size, pMaskDict); |
| m_pDocument->AddIndirectObject(pMaskStream); |
| pDict->SetAtReference("SMask", m_pDocument, pMaskStream); |
| if (bDeleteMask) { |
| delete pMaskBitmap; |
| } |
| } |
| FX_BOOL bStream = pFileWrite && pFileRead; |
| if (opType == 0) { |
| if (iCompress & PDF_IMAGE_LOSSLESS_COMPRESS) { |
| if (pBitmap->GetBPP() == 1) { |
| _JBIG2EncodeBitmap(pDict, pBitmap, m_pDocument, dest_buf, dest_size, |
| TRUE); |
| } |
| } else { |
| if (pBitmap->GetBPP() == 1) { |
| _JBIG2EncodeBitmap(pDict, pBitmap, m_pDocument, dest_buf, dest_size, |
| FALSE); |
| } else if (pBitmap->GetBPP() >= 8 && pBitmap->GetPalette()) { |
| CFX_DIBitmap* pNewBitmap = new CFX_DIBitmap(); |
| pNewBitmap->Copy(pBitmap); |
| pNewBitmap->ConvertFormat(FXDIB_Rgb); |
| SetImage(pNewBitmap, iCompress, pFileWrite, pFileRead); |
| if (pDict) { |
| pDict->Release(); |
| pDict = NULL; |
| } |
| FX_Free(dest_buf); |
| dest_buf = NULL; |
| dest_size = 0; |
| delete pNewBitmap; |
| return; |
| } else { |
| if (bUseMatte) { |
| CFX_DIBitmap* pNewBitmap = new CFX_DIBitmap(); |
| pNewBitmap->Create(BitmapWidth, BitmapHeight, FXDIB_Argb); |
| uint8_t* dst_buf = pNewBitmap->GetBuffer(); |
| int32_t src_offset = 0; |
| for (int32_t row = 0; row < BitmapHeight; row++) { |
| src_offset = row * src_pitch; |
| for (int32_t column = 0; column < BitmapWidth; column++) { |
| FX_FLOAT alpha = src_buf[src_offset + 3] / 255.0f; |
| dst_buf[src_offset] = (uint8_t)(src_buf[src_offset] * alpha); |
| dst_buf[src_offset + 1] = |
| (uint8_t)(src_buf[src_offset + 1] * alpha); |
| dst_buf[src_offset + 2] = |
| (uint8_t)(src_buf[src_offset + 2] * alpha); |
| dst_buf[src_offset + 3] = (uint8_t)(src_buf[src_offset + 3]); |
| src_offset += 4; |
| } |
| } |
| _DCTEncodeBitmap(pDict, pNewBitmap, pParam ? pParam->nQuality : 75, |
| dest_buf, dest_size); |
| delete pNewBitmap; |
| } else { |
| _DCTEncodeBitmap(pDict, pBitmap, pParam ? pParam->nQuality : 75, |
| dest_buf, dest_size); |
| } |
| } |
| } |
| if (bStream) { |
| pFileWrite->WriteBlock(dest_buf, dest_size); |
| FX_Free(dest_buf); |
| dest_buf = NULL; |
| } |
| } else if (opType == 1) { |
| if (!bStream) { |
| dest_buf = FX_Alloc2D(uint8_t, dest_pitch, BitmapHeight); |
| dest_size = |
| dest_pitch * BitmapHeight; // Safe since checked alloc returned. |
| } |
| uint8_t* pDest = dest_buf; |
| for (int32_t i = 0; i < BitmapHeight; i++) { |
| if (!bStream) { |
| FXSYS_memcpy(pDest, src_buf, dest_pitch); |
| pDest += dest_pitch; |
| } else { |
| pFileWrite->WriteBlock(src_buf, dest_pitch); |
| } |
| src_buf += src_pitch; |
| } |
| } else if (opType == 2) { |
| if (!bStream) { |
| dest_buf = FX_Alloc2D(uint8_t, dest_pitch, BitmapHeight); |
| dest_size = |
| dest_pitch * BitmapHeight; // Safe since checked alloc returned. |
| } else { |
| dest_buf = FX_Alloc(uint8_t, dest_pitch); |
| } |
| uint8_t* pDest = dest_buf; |
| int32_t src_offset = 0; |
| int32_t dest_offset = 0; |
| for (int32_t row = 0; row < BitmapHeight; row++) { |
| src_offset = row * src_pitch; |
| for (int32_t column = 0; column < BitmapWidth; column++) { |
| FX_FLOAT alpha = bUseMatte ? src_buf[src_offset + 3] / 255.0f : 1; |
| pDest[dest_offset] = (uint8_t)(src_buf[src_offset + 2] * alpha); |
| pDest[dest_offset + 1] = (uint8_t)(src_buf[src_offset + 1] * alpha); |
| pDest[dest_offset + 2] = (uint8_t)(src_buf[src_offset] * alpha); |
| dest_offset += 3; |
| src_offset += bpp == 24 ? 3 : 4; |
| } |
| if (bStream) { |
| pFileWrite->WriteBlock(pDest, dest_pitch); |
| pDest = dest_buf; |
| } else { |
| pDest += dest_pitch; |
| } |
| dest_offset = 0; |
| } |
| if (bStream) { |
| FX_Free(dest_buf); |
| dest_buf = NULL; |
| } |
| } |
| if (!m_pStream) { |
| m_pStream = new CPDF_Stream(NULL, 0, NULL); |
| } |
| if (!bStream) { |
| m_pStream->InitStream(dest_buf, dest_size, pDict); |
| } else { |
| pFileWrite->Flush(); |
| m_pStream->InitStreamFromFile(pFileRead, pDict); |
| } |
| m_bIsMask = pBitmap->IsAlphaMask(); |
| m_Width = BitmapWidth; |
| m_Height = BitmapHeight; |
| FX_Free(dest_buf); |
| } |
| void CPDF_Image::ResetCache(CPDF_Page* pPage, const CFX_DIBitmap* pBitmap) { |
| pPage->GetRenderCache()->ResetBitmap(m_pStream, pBitmap); |
| } |
