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// 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 "../../../include/fpdfapi/fpdf_module.h"
#include "../../../include/fpdfapi/fpdf_page.h"
#include "../../../include/fxcodec/fx_codec.h"
#include "../../../include/fpdfapi/fpdf_render.h"
#include "../fpdf_page/pageint.h"
#include "../fpdf_render/render_int.h"
CPDF_Dictionary* CPDF_Image::InitJPEG(FX_LPBYTE pData, FX_DWORD size)
{
FX_INT32 width, height, color_trans, num_comps, bits;
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);
FX_LPCSTR 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 = CPDF_Array::Create();
for (int n = 0; n < 4; n ++) {
pDecode->AddInteger(1);
pDecode->AddInteger(0);
}
pDict->SetAt(FX_BSTRC("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 == NULL) {
m_pStream = new CPDF_Stream(NULL, 0, NULL);
}
return pDict;
}
void CPDF_Image::SetJpegImage(FX_LPBYTE 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;
}
FX_LPBYTE pData = FX_Alloc(FX_BYTE, dwEstimateSize);
if (!pData) {
return;
}
pFile->ReadBlock(pData, 0, dwEstimateSize);
CPDF_Dictionary *pDict = InitJPEG(pData, dwEstimateSize);
FX_Free(pData);
if (!pDict && size > dwEstimateSize) {
pData = FX_Alloc(FX_BYTE, size);
if (!pData) {
return;
}
pFile->ReadBlock(pData, 0, size);
pDict = InitJPEG(pData, size);
FX_Free(pData);
}
if (!pDict) {
return;
}
m_pStream->InitStream(pFile, pDict);
}
void _DCTEncodeBitmap(CPDF_Dictionary *pBitmapDict, const CFX_DIBitmap* pBitmap, int quality, FX_LPBYTE &buf, FX_STRSIZE &size)
{
}
void _JBIG2EncodeBitmap(CPDF_Dictionary *pBitmapDict, const CFX_DIBitmap *pBitmap, CPDF_Document *pDoc, FX_LPBYTE &buf, FX_STRSIZE &size, FX_BOOL bLossLess)
{
}
void CPDF_Image::SetImage(const CFX_DIBitmap* pBitmap, FX_INT32 iCompress, IFX_FileWrite *pFileWrite, IFX_FileRead *pFileRead, const CFX_DIBitmap* pMask, const CPDF_ImageSetParam* pParam)
{
FX_INT32 BitmapWidth = pBitmap->GetWidth();
FX_INT32 BitmapHeight = pBitmap->GetHeight();
if (BitmapWidth < 1 || BitmapHeight < 1) {
return;
}
FX_LPBYTE src_buf = pBitmap->GetBuffer();
FX_INT32 src_pitch = pBitmap->GetPitch();
FX_INT32 bpp = pBitmap->GetBPP();
FX_BOOL bUseMatte = pParam && pParam->pMatteColor && (pBitmap->GetFormat() == FXDIB_Argb);
CPDF_Dictionary* pDict = new CPDF_Dictionary;
pDict->SetAtName(FX_BSTRC("Type"), FX_BSTRC("XObject"));
pDict->SetAtName(FX_BSTRC("Subtype"), FX_BSTRC("Image"));
pDict->SetAtInteger(FX_BSTRC("Width"), BitmapWidth);
pDict->SetAtInteger(FX_BSTRC("Height"), BitmapHeight);
FX_LPBYTE dest_buf = NULL;
FX_STRSIZE dest_pitch = 0, dest_size = 0, opType = -1;
if (bpp == 1) {
FX_INT32 reset_a = 0, reset_r = 0, reset_g = 0, reset_b = 0;
FX_INT32 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(FX_BSTRC("ImageMask"), new CPDF_Boolean(TRUE));
if (reset_a == 0) {
CPDF_Array* pArray = new CPDF_Array;
pArray->AddInteger(1);
pArray->AddInteger(0);
pDict->SetAt(FX_BSTRC("Decode"), pArray);
}
} else {
CPDF_Array* pCS = new CPDF_Array;
pCS->AddName(FX_BSTRC("Indexed"));
pCS->AddName(FX_BSTRC("DeviceRGB"));
pCS->AddInteger(1);
CFX_ByteString ct;
FX_LPSTR 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(CPDF_String::Create(ct, TRUE));
pDict->SetAt(FX_BSTRC("ColorSpace"), pCS);
}
pDict->SetAtInteger(FX_BSTRC("BitsPerComponent"), 1);
dest_pitch = (BitmapWidth + 7) / 8;
if ((iCompress & 0x03) == PDF_IMAGE_NO_COMPRESS) {
opType = 1;
} else {
opType = 0;
}
} else if (bpp == 8) {
FX_INT32 iPalette = pBitmap->GetPaletteSize();
if (iPalette > 0) {
CPDF_Array* pCS = new CPDF_Array;
m_pDocument->AddIndirectObject(pCS);
pCS->AddName(FX_BSTRC("Indexed"));
pCS->AddName(FX_BSTRC("DeviceRGB"));
pCS->AddInteger(iPalette - 1);
FX_LPBYTE pColorTable = FX_Alloc(FX_BYTE, iPalette * 3);
FX_LPBYTE ptr = pColorTable;
for (FX_INT32 i = 0; i < iPalette; i ++) {
FX_DWORD argb = pBitmap->GetPaletteArgb(i);
ptr[0] = (FX_BYTE)(argb >> 16);
ptr[1] = (FX_BYTE)(argb >> 8);
ptr[2] = (FX_BYTE)argb;
ptr += 3;
}
CPDF_Stream *pCTS = CPDF_Stream::Create(pColorTable, iPalette * 3, CPDF_Dictionary::Create());
m_pDocument->AddIndirectObject(pCTS);
pCS->AddReference(m_pDocument, pCTS);
pDict->SetAtReference(FX_BSTRC("ColorSpace"), m_pDocument, pCS);
} else {
pDict->SetAtName(FX_BSTRC("ColorSpace"), FX_BSTRC("DeviceGray"));
}
pDict->SetAtInteger(FX_BSTRC("BitsPerComponent"), 8);
if ((iCompress & 0x03) == PDF_IMAGE_NO_COMPRESS) {
dest_pitch = BitmapWidth;
opType = 1;
} else {
opType = 0;
}
} else {
pDict->SetAtName(FX_BSTRC("ColorSpace"), FX_BSTRC("DeviceRGB"));
pDict->SetAtInteger(FX_BSTRC("BitsPerComponent"), 8);
if ((iCompress & 0x03) == PDF_IMAGE_NO_COMPRESS) {
dest_pitch = BitmapWidth * 3;
opType = 2;
} else {
opType = 0;
}
}
const CFX_DIBitmap* pMaskBitmap = NULL;
if (pBitmap->HasAlpha()) {
pMaskBitmap = pBitmap->GetAlphaMask();
}
if (!pMaskBitmap && pMask) {
FXDIB_Format maskFormat = pMask->GetFormat();
if (maskFormat == FXDIB_1bppMask || maskFormat == FXDIB_8bppMask) {
pMaskBitmap = pMask;
}
}
if (pMaskBitmap) {
FX_INT32 maskWidth = pMaskBitmap->GetWidth();
FX_INT32 maskHeight = pMaskBitmap->GetHeight();
FX_LPBYTE mask_buf = NULL;
FX_STRSIZE mask_size;
FX_BOOL bDeleteMask = TRUE;
CPDF_Dictionary* pMaskDict = new CPDF_Dictionary;
pMaskDict->SetAtName(FX_BSTRC("Type"), FX_BSTRC("XObject"));
pMaskDict->SetAtName(FX_BSTRC("Subtype"), FX_BSTRC("Image"));
pMaskDict->SetAtInteger(FX_BSTRC("Width"), maskWidth);
pMaskDict->SetAtInteger(FX_BSTRC("Height"), maskHeight);
pMaskDict->SetAtName(FX_BSTRC("ColorSpace"), FX_BSTRC("DeviceGray"));
pMaskDict->SetAtInteger(FX_BSTRC("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_size = maskHeight * maskWidth;
mask_buf = FX_Alloc(FX_BYTE, mask_size);
for (FX_INT32 a = 0; a < maskHeight; a ++) {
FXSYS_memcpy32(mask_buf + a * maskWidth, pMaskBitmap->GetScanline(a), maskWidth);
}
}
if (pMaskDict) {
pMaskDict->SetAtInteger(FX_BSTRC("Length"), mask_size);
CPDF_Stream* pMaskStream = NULL;
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(FX_BSTRC("Matte"), pMatte);
}
pMaskStream = new CPDF_Stream(mask_buf, mask_size, pMaskDict);
m_pDocument->AddIndirectObject(pMaskStream);
bDeleteMask = FALSE;
pDict->SetAtReference(FX_BSTRC("SMask"), m_pDocument, pMaskStream);
}
if (pBitmap->HasAlpha()) {
delete pMaskBitmap;
}
}
FX_BOOL bStream = pFileWrite != NULL && pFileRead != NULL;
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() != NULL) {
CFX_DIBitmap *pNewBitmap = new CFX_DIBitmap();
pNewBitmap->Copy(pBitmap);
pNewBitmap->ConvertFormat(FXDIB_Rgb);
SetImage(pNewBitmap, iCompress, pFileWrite, pFileRead);
if (pDict) {
pDict->Release();
pDict = NULL;
}
if (dest_buf) {
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);
FX_LPBYTE dst_buf = pNewBitmap->GetBuffer();
FX_INT32 src_offset = 0;
for (FX_INT32 row = 0; row < BitmapHeight; row ++) {
src_offset = row * src_pitch;
for (FX_INT32 column = 0; column < BitmapWidth; column ++) {
FX_FLOAT alpha = src_buf[src_offset + 3] / 255.0f;
dst_buf[src_offset] = (FX_BYTE)(src_buf[src_offset] * alpha);
dst_buf[src_offset + 1] = (FX_BYTE)(src_buf[src_offset + 1] * alpha);
dst_buf[src_offset + 2] = (FX_BYTE)(src_buf[src_offset + 2] * alpha);
dst_buf[src_offset + 3] = (FX_BYTE)(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_size = dest_pitch * BitmapHeight;
dest_buf = FX_Alloc(FX_BYTE, dest_size);
}
FX_LPBYTE pDest = dest_buf;
for (FX_INT32 i = 0; i < BitmapHeight; i ++) {
if (!bStream) {
FXSYS_memcpy32(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_size = dest_pitch * BitmapHeight;
dest_buf = FX_Alloc(FX_BYTE, dest_size);
} else {
dest_buf = FX_Alloc(FX_BYTE, dest_pitch);
}
FX_LPBYTE pDest = dest_buf;
FX_INT32 src_offset = 0;
FX_INT32 dest_offset = 0;
for (FX_INT32 row = 0; row < BitmapHeight; row ++) {
src_offset = row * src_pitch;
for (FX_INT32 column = 0; column < BitmapWidth; column ++) {
FX_FLOAT alpha = bUseMatte ? src_buf[src_offset + 3] / 255.0f : 1;
pDest[dest_offset] = (FX_BYTE)(src_buf[src_offset + 2] * alpha);
pDest[dest_offset + 1] = (FX_BYTE)(src_buf[src_offset + 1] * alpha);
pDest[dest_offset + 2] = (FX_BYTE)(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 == NULL) {
m_pStream = new CPDF_Stream(NULL, 0, NULL);
}
if (!bStream) {
m_pStream->InitStream(dest_buf, dest_size, pDict);
} else {
pFileWrite->Flush();
m_pStream->InitStream(pFileRead, pDict);
}
m_bIsMask = pBitmap->IsAlphaMask();
m_Width = BitmapWidth;
m_Height = BitmapHeight;
if (dest_buf) {
FX_Free(dest_buf);
}
}
void CPDF_Image::ResetCache(CPDF_Page* pPage, const CFX_DIBitmap* pBitmap)
{
pPage->GetRenderCache()->ResetBitmap(m_pStream, pBitmap);
}