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 #include "../../../include/fpdfapi/fpdf_module.h"
8 #include "../../../include/fpdfapi/fpdf_page.h"
9 #include "../../../include/fxcodec/fx_codec.h"
10 #include "../../../include/fpdfapi/fpdf_render.h"
11 #include "../fpdf_page/pageint.h"
12 #include "../fpdf_render/render_int.h"
InitJPEG(FX_LPBYTE pData,FX_DWORD size)13 CPDF_Dictionary* CPDF_Image::InitJPEG(FX_LPBYTE pData, FX_DWORD size)
14 {
15 FX_INT32 width, height, color_trans, num_comps, bits;
16 if (!CPDF_ModuleMgr::Get()->GetJpegModule()->
17 LoadInfo(pData, size, width, height, num_comps, bits, color_trans)) {
18 return NULL;
19 }
20 CPDF_Dictionary* pDict = FX_NEW CPDF_Dictionary;
21 pDict->SetAtName("Type", "XObject");
22 pDict->SetAtName("Subtype", "Image");
23 pDict->SetAtInteger("Width", width);
24 pDict->SetAtInteger("Height", height);
25 FX_LPCSTR csname = NULL;
26 if (num_comps == 1) {
27 csname = "DeviceGray";
28 } else if (num_comps == 3) {
29 csname = "DeviceRGB";
30 } else if (num_comps == 4) {
31 csname = "DeviceCMYK";
32 CPDF_Array* pDecode = CPDF_Array::Create();
33 for (int n = 0; n < 4; n ++) {
34 pDecode->AddInteger(1);
35 pDecode->AddInteger(0);
36 }
37 pDict->SetAt(FX_BSTRC("Decode"), pDecode);
38 }
39 pDict->SetAtName("ColorSpace", csname);
40 pDict->SetAtInteger("BitsPerComponent", bits);
41 pDict->SetAtName("Filter", "DCTDecode");
42 if (!color_trans) {
43 CPDF_Dictionary* pParms = FX_NEW CPDF_Dictionary;
44 pDict->SetAt("DecodeParms", pParms);
45 pParms->SetAtInteger("ColorTransform", 0);
46 }
47 m_bIsMask = FALSE;
48 m_Width = width;
49 m_Height = height;
50 if (m_pStream == NULL) {
51 m_pStream = FX_NEW CPDF_Stream(NULL, 0, NULL);
52 }
53 return pDict;
54 }
SetJpegImage(FX_LPBYTE pData,FX_DWORD size)55 void CPDF_Image::SetJpegImage(FX_LPBYTE pData, FX_DWORD size)
56 {
57 CPDF_Dictionary *pDict = InitJPEG(pData, size);
58 if (!pDict) {
59 return;
60 }
61 m_pStream->InitStream(pData, size, pDict);
62 }
SetJpegImage(IFX_FileRead * pFile)63 void CPDF_Image::SetJpegImage(IFX_FileRead *pFile)
64 {
65 FX_DWORD size = (FX_DWORD)pFile->GetSize();
66 if (!size) {
67 return;
68 }
69 FX_DWORD dwEstimateSize = size;
70 if (dwEstimateSize > 8192) {
71 dwEstimateSize = 8192;
72 }
73 FX_LPBYTE pData = FX_Alloc(FX_BYTE, dwEstimateSize);
74 if (!pData) {
75 return;
76 }
77 pFile->ReadBlock(pData, 0, dwEstimateSize);
78 CPDF_Dictionary *pDict = InitJPEG(pData, dwEstimateSize);
79 FX_Free(pData);
80 if (!pDict && size > dwEstimateSize) {
81 pData = FX_Alloc(FX_BYTE, size);
82 if (!pData) {
83 return;
84 }
85 pFile->ReadBlock(pData, 0, size);
86 pDict = InitJPEG(pData, size);
87 FX_Free(pData);
88 }
89 if (!pDict) {
90 return;
91 }
92 m_pStream->InitStream(pFile, pDict);
93 }
_DCTEncodeBitmap(CPDF_Dictionary * pBitmapDict,const CFX_DIBitmap * pBitmap,int quality,FX_LPBYTE & buf,FX_STRSIZE & size)94 void _DCTEncodeBitmap(CPDF_Dictionary *pBitmapDict, const CFX_DIBitmap* pBitmap, int quality, FX_LPBYTE &buf, FX_STRSIZE &size)
95 {
96 }
_JBIG2EncodeBitmap(CPDF_Dictionary * pBitmapDict,const CFX_DIBitmap * pBitmap,CPDF_Document * pDoc,FX_LPBYTE & buf,FX_STRSIZE & size,FX_BOOL bLossLess)97 void _JBIG2EncodeBitmap(CPDF_Dictionary *pBitmapDict, const CFX_DIBitmap *pBitmap, CPDF_Document *pDoc, FX_LPBYTE &buf, FX_STRSIZE &size, FX_BOOL bLossLess)
98 {
99 }
SetImage(const CFX_DIBitmap * pBitmap,FX_INT32 iCompress,IFX_FileWrite * pFileWrite,IFX_FileRead * pFileRead,const CFX_DIBitmap * pMask,const CPDF_ImageSetParam * pParam)100 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)
101 {
102 FX_INT32 BitmapWidth = pBitmap->GetWidth();
103 FX_INT32 BitmapHeight = pBitmap->GetHeight();
104 if (BitmapWidth < 1 || BitmapHeight < 1) {
105 return;
106 }
107 FX_LPBYTE src_buf = pBitmap->GetBuffer();
108 FX_INT32 src_pitch = pBitmap->GetPitch();
109 FX_INT32 bpp = pBitmap->GetBPP();
110 FX_BOOL bUseMatte = pParam && pParam->pMatteColor && (pBitmap->GetFormat() == FXDIB_Argb);
111 CPDF_Dictionary* pDict = FX_NEW CPDF_Dictionary;
112 pDict->SetAtName(FX_BSTRC("Type"), FX_BSTRC("XObject"));
113 pDict->SetAtName(FX_BSTRC("Subtype"), FX_BSTRC("Image"));
114 pDict->SetAtInteger(FX_BSTRC("Width"), BitmapWidth);
115 pDict->SetAtInteger(FX_BSTRC("Height"), BitmapHeight);
116 FX_LPBYTE dest_buf = NULL;
117 FX_STRSIZE dest_pitch = 0, dest_size = 0, opType = -1;
118 if (bpp == 1) {
119 FX_INT32 reset_a = 0, reset_r = 0, reset_g = 0, reset_b = 0;
120 FX_INT32 set_a = 0, set_r = 0, set_g = 0, set_b = 0;
121 if (!pBitmap->IsAlphaMask()) {
122 ArgbDecode(pBitmap->GetPaletteArgb(0), reset_a, reset_r, reset_g, reset_b);
123 ArgbDecode(pBitmap->GetPaletteArgb(1), set_a, set_r, set_g, set_b);
124 }
125 if (set_a == 0 || reset_a == 0) {
126 pDict->SetAt(FX_BSTRC("ImageMask"), FX_NEW CPDF_Boolean(TRUE));
127 if (reset_a == 0) {
128 CPDF_Array* pArray = FX_NEW CPDF_Array;
129 pArray->AddInteger(1);
130 pArray->AddInteger(0);
131 pDict->SetAt(FX_BSTRC("Decode"), pArray);
132 }
133 } else {
134 CPDF_Array* pCS = FX_NEW CPDF_Array;
135 pCS->AddName(FX_BSTRC("Indexed"));
136 pCS->AddName(FX_BSTRC("DeviceRGB"));
137 pCS->AddInteger(1);
138 CFX_ByteString ct;
139 FX_LPSTR pBuf = ct.GetBuffer(6);
140 pBuf[0] = (FX_CHAR)reset_r;
141 pBuf[1] = (FX_CHAR)reset_g;
142 pBuf[2] = (FX_CHAR)reset_b;
143 pBuf[3] = (FX_CHAR)set_r;
144 pBuf[4] = (FX_CHAR)set_g;
145 pBuf[5] = (FX_CHAR)set_b;
146 ct.ReleaseBuffer(6);
147 pCS->Add(CPDF_String::Create(ct, TRUE));
148 pDict->SetAt(FX_BSTRC("ColorSpace"), pCS);
149 }
150 pDict->SetAtInteger(FX_BSTRC("BitsPerComponent"), 1);
151 dest_pitch = (BitmapWidth + 7) / 8;
152 if ((iCompress & 0x03) == PDF_IMAGE_NO_COMPRESS) {
153 opType = 1;
154 } else {
155 opType = 0;
156 }
157 } else if (bpp == 8) {
158 FX_INT32 iPalette = pBitmap->GetPaletteSize();
159 if (iPalette > 0) {
160 CPDF_Array* pCS = FX_NEW CPDF_Array;
161 m_pDocument->AddIndirectObject(pCS);
162 pCS->AddName(FX_BSTRC("Indexed"));
163 pCS->AddName(FX_BSTRC("DeviceRGB"));
164 pCS->AddInteger(iPalette - 1);
165 FX_LPBYTE pColorTable = FX_Alloc(FX_BYTE, iPalette * 3);
166 FX_LPBYTE ptr = pColorTable;
167 for (FX_INT32 i = 0; i < iPalette; i ++) {
168 FX_DWORD argb = pBitmap->GetPaletteArgb(i);
169 ptr[0] = (FX_BYTE)(argb >> 16);
170 ptr[1] = (FX_BYTE)(argb >> 8);
171 ptr[2] = (FX_BYTE)argb;
172 ptr += 3;
173 }
174 CPDF_Stream *pCTS = CPDF_Stream::Create(pColorTable, iPalette * 3, CPDF_Dictionary::Create());
175 m_pDocument->AddIndirectObject(pCTS);
176 pCS->AddReference(m_pDocument, pCTS);
177 pDict->SetAtReference(FX_BSTRC("ColorSpace"), m_pDocument, pCS);
178 } else {
179 pDict->SetAtName(FX_BSTRC("ColorSpace"), FX_BSTRC("DeviceGray"));
180 }
181 pDict->SetAtInteger(FX_BSTRC("BitsPerComponent"), 8);
182 if ((iCompress & 0x03) == PDF_IMAGE_NO_COMPRESS) {
183 dest_pitch = BitmapWidth;
184 opType = 1;
185 } else {
186 opType = 0;
187 }
188 } else {
189 pDict->SetAtName(FX_BSTRC("ColorSpace"), FX_BSTRC("DeviceRGB"));
190 pDict->SetAtInteger(FX_BSTRC("BitsPerComponent"), 8);
191 if ((iCompress & 0x03) == PDF_IMAGE_NO_COMPRESS) {
192 dest_pitch = BitmapWidth * 3;
193 opType = 2;
194 } else {
195 opType = 0;
196 }
197 }
198 const CFX_DIBitmap* pMaskBitmap = NULL;
199 if (pBitmap->HasAlpha()) {
200 pMaskBitmap = pBitmap->GetAlphaMask();
201 }
202 if (!pMaskBitmap && pMask) {
203 FXDIB_Format maskFormat = pMask->GetFormat();
204 if (maskFormat == FXDIB_1bppMask || maskFormat == FXDIB_8bppMask) {
205 pMaskBitmap = pMask;
206 }
207 }
208 if (pMaskBitmap) {
209 FX_INT32 maskWidth = pMaskBitmap->GetWidth();
210 FX_INT32 maskHeight = pMaskBitmap->GetHeight();
211 FX_LPBYTE mask_buf = NULL;
212 FX_STRSIZE mask_size;
213 FX_BOOL bDeleteMask = TRUE;
214 CPDF_Dictionary* pMaskDict = FX_NEW CPDF_Dictionary;
215 pMaskDict->SetAtName(FX_BSTRC("Type"), FX_BSTRC("XObject"));
216 pMaskDict->SetAtName(FX_BSTRC("Subtype"), FX_BSTRC("Image"));
217 pMaskDict->SetAtInteger(FX_BSTRC("Width"), maskWidth);
218 pMaskDict->SetAtInteger(FX_BSTRC("Height"), maskHeight);
219 pMaskDict->SetAtName(FX_BSTRC("ColorSpace"), FX_BSTRC("DeviceGray"));
220 pMaskDict->SetAtInteger(FX_BSTRC("BitsPerComponent"), 8);
221 if (pMaskBitmap->GetBPP() == 8 && (iCompress & PDF_IMAGE_MASK_LOSSY_COMPRESS) != 0) {
222 _DCTEncodeBitmap(pMaskDict, pMaskBitmap, pParam ? pParam->nQuality : 75, mask_buf, mask_size);
223 } else if (pMaskBitmap->GetFormat() == FXDIB_1bppMask) {
224 _JBIG2EncodeBitmap(pMaskDict, pMaskBitmap, m_pDocument, mask_buf, mask_size, TRUE);
225 } else {
226 mask_size = maskHeight * maskWidth;
227 mask_buf = FX_Alloc(FX_BYTE, mask_size);
228 for (FX_INT32 a = 0; a < maskHeight; a ++) {
229 FXSYS_memcpy32(mask_buf + a * maskWidth, pMaskBitmap->GetScanline(a), maskWidth);
230 }
231 }
232 if (pMaskDict) {
233 pMaskDict->SetAtInteger(FX_BSTRC("Length"), mask_size);
234 CPDF_Stream* pMaskStream = NULL;
235 if (bUseMatte) {
236 int a, r, g, b;
237 ArgbDecode(*(pParam->pMatteColor), a, r, g, b);
238 CPDF_Array* pMatte = FX_NEW CPDF_Array;
239 pMatte->AddInteger(r);
240 pMatte->AddInteger(g);
241 pMatte->AddInteger(b);
242 pMaskDict->SetAt(FX_BSTRC("Matte"), pMatte);
243 }
244 pMaskStream = FX_NEW CPDF_Stream(mask_buf, mask_size, pMaskDict);
245 m_pDocument->AddIndirectObject(pMaskStream);
246 bDeleteMask = FALSE;
247 pDict->SetAtReference(FX_BSTRC("SMask"), m_pDocument, pMaskStream);
248 }
249 if (pBitmap->HasAlpha()) {
250 delete pMaskBitmap;
251 }
252 }
253 FX_BOOL bStream = pFileWrite != NULL && pFileRead != NULL;
254 if (opType == 0) {
255 if (iCompress & PDF_IMAGE_LOSSLESS_COMPRESS) {
256 if (pBitmap->GetBPP() == 1) {
257 _JBIG2EncodeBitmap(pDict, pBitmap, m_pDocument, dest_buf, dest_size, TRUE);
258 }
259 } else {
260 if (pBitmap->GetBPP() == 1) {
261 _JBIG2EncodeBitmap(pDict, pBitmap, m_pDocument, dest_buf, dest_size, FALSE);
262 } else if (pBitmap->GetBPP() >= 8 && pBitmap->GetPalette() != NULL) {
263 CFX_DIBitmap *pNewBitmap = FX_NEW CFX_DIBitmap();
264 pNewBitmap->Copy(pBitmap);
265 pNewBitmap->ConvertFormat(FXDIB_Rgb);
266 SetImage(pNewBitmap, iCompress, pFileWrite, pFileRead);
267 if (pDict) {
268 pDict->Release();
269 pDict = NULL;
270 }
271 if (dest_buf) {
272 FX_Free(dest_buf);
273 dest_buf = NULL;
274 }
275 dest_size = 0;
276 delete pNewBitmap;
277 return;
278 } else {
279 if (bUseMatte) {
280 CFX_DIBitmap *pNewBitmap = FX_NEW CFX_DIBitmap();
281 pNewBitmap->Create(BitmapWidth, BitmapHeight, FXDIB_Argb);
282 FX_LPBYTE dst_buf = pNewBitmap->GetBuffer();
283 FX_INT32 src_offset = 0;
284 for (FX_INT32 row = 0; row < BitmapHeight; row ++) {
285 src_offset = row * src_pitch;
286 for (FX_INT32 column = 0; column < BitmapWidth; column ++) {
287 FX_FLOAT alpha = src_buf[src_offset + 3] / 255.0f;
288 dst_buf[src_offset] = (FX_BYTE)(src_buf[src_offset] * alpha);
289 dst_buf[src_offset + 1] = (FX_BYTE)(src_buf[src_offset + 1] * alpha);
290 dst_buf[src_offset + 2] = (FX_BYTE)(src_buf[src_offset + 2] * alpha);
291 dst_buf[src_offset + 3] = (FX_BYTE)(src_buf[src_offset + 3]);
292 src_offset += 4;
293 }
294 }
295 _DCTEncodeBitmap(pDict, pNewBitmap, pParam ? pParam->nQuality : 75, dest_buf, dest_size);
296 delete pNewBitmap;
297 } else {
298 _DCTEncodeBitmap(pDict, pBitmap, pParam ? pParam->nQuality : 75, dest_buf, dest_size);
299 }
300 }
301 }
302 if (bStream) {
303 pFileWrite->WriteBlock(dest_buf, dest_size);
304 FX_Free(dest_buf);
305 dest_buf = NULL;
306 }
307 } else if (opType == 1) {
308 if (!bStream) {
309 dest_size = dest_pitch * BitmapHeight;
310 dest_buf = FX_Alloc(FX_BYTE, dest_size);
311 }
312 FX_LPBYTE pDest = dest_buf;
313 for (FX_INT32 i = 0; i < BitmapHeight; i ++) {
314 if (!bStream) {
315 FXSYS_memcpy32(pDest, src_buf, dest_pitch);
316 pDest += dest_pitch;
317 } else {
318 pFileWrite->WriteBlock(src_buf, dest_pitch);
319 }
320 src_buf += src_pitch;
321 }
322 } else if (opType == 2) {
323 if (!bStream) {
324 dest_size = dest_pitch * BitmapHeight;
325 dest_buf = FX_Alloc(FX_BYTE, dest_size);
326 } else {
327 dest_buf = FX_Alloc(FX_BYTE, dest_pitch);
328 }
329 FX_LPBYTE pDest = dest_buf;
330 FX_INT32 src_offset = 0;
331 FX_INT32 dest_offset = 0;
332 for (FX_INT32 row = 0; row < BitmapHeight; row ++) {
333 src_offset = row * src_pitch;
334 for (FX_INT32 column = 0; column < BitmapWidth; column ++) {
335 FX_FLOAT alpha = bUseMatte ? src_buf[src_offset + 3] / 255.0f : 1;
336 pDest[dest_offset] = (FX_BYTE)(src_buf[src_offset + 2] * alpha);
337 pDest[dest_offset + 1] = (FX_BYTE)(src_buf[src_offset + 1] * alpha);
338 pDest[dest_offset + 2] = (FX_BYTE)(src_buf[src_offset] * alpha);
339 dest_offset += 3;
340 src_offset += bpp == 24 ? 3 : 4;
341 }
342 if (bStream) {
343 pFileWrite->WriteBlock(pDest, dest_pitch);
344 pDest = dest_buf;
345 } else {
346 pDest += dest_pitch;
347 }
348 dest_offset = 0;
349 }
350 if (bStream) {
351 FX_Free(dest_buf);
352 dest_buf = NULL;
353 }
354 }
355 if (m_pStream == NULL) {
356 m_pStream = FX_NEW CPDF_Stream(NULL, 0, NULL);
357 }
358 if (!bStream) {
359 m_pStream->InitStream(dest_buf, dest_size, pDict);
360 } else {
361 pFileWrite->Flush();
362 m_pStream->InitStream(pFileRead, pDict);
363 }
364 m_bIsMask = pBitmap->IsAlphaMask();
365 m_Width = BitmapWidth;
366 m_Height = BitmapHeight;
367 if (dest_buf) {
368 FX_Free(dest_buf);
369 }
370 }
ResetCache(CPDF_Page * pPage,const CFX_DIBitmap * pBitmap)371 void CPDF_Image::ResetCache(CPDF_Page* pPage, const CFX_DIBitmap* pBitmap)
372 {
373 pPage->GetRenderCache()->ResetBitmap(m_pStream, pBitmap);
374 }
375