summaryrefslogtreecommitdiff
path: root/core/fpdfapi/page/cpdf_image.cpp
blob: b74de6225096c0f226ccc3a120f142a3df1b5a5f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
// Copyright 2016 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/fpdfapi/page/cpdf_image.h"

#include <algorithm>
#include <memory>
#include <utility>
#include <vector>

#include "core/fpdfapi/cpdf_modulemgr.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_boolean.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_name.h"
#include "core/fpdfapi/parser/cpdf_number.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_string.h"
#include "core/fpdfapi/render/cpdf_dibsource.h"
#include "core/fpdfapi/render/cpdf_pagerendercache.h"
#include "core/fxcodec/codec/ccodec_jpegmodule.h"
#include "core/fxcrt/fx_stream.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_dib.h"
#include "third_party/base/numerics/safe_conversions.h"
#include "third_party/base/ptr_util.h"

CPDF_Image::CPDF_Image(CPDF_Document* pDoc) : m_pDocument(pDoc) {}

CPDF_Image::CPDF_Image(CPDF_Document* pDoc,
                       std::unique_ptr<CPDF_Stream> pStream)
    : m_bIsInline(true), m_pDocument(pDoc), m_pStream(std::move(pStream)) {
  ASSERT(m_pStream.IsOwned());
  FinishInitialization(m_pStream->GetDict());
}

CPDF_Image::CPDF_Image(CPDF_Document* pDoc, uint32_t dwStreamObjNum)
    : m_pDocument(pDoc),
      m_pStream(ToStream(pDoc->GetIndirectObject(dwStreamObjNum))) {
  ASSERT(!m_pStream.IsOwned());
  FinishInitialization(m_pStream->GetDict());
}

CPDF_Image::~CPDF_Image() {}

void CPDF_Image::FinishInitialization(CPDF_Dictionary* pDict) {
  m_pOC = pDict->GetDictFor("OC");
  m_bIsMask =
      !pDict->KeyExist("ColorSpace") || pDict->GetIntegerFor("ImageMask");
  m_bInterpolate = !!pDict->GetIntegerFor("Interpolate");
  m_Height = pDict->GetIntegerFor("Height");
  m_Width = pDict->GetIntegerFor("Width");
}

void CPDF_Image::ConvertStreamToIndirectObject() {
  if (!m_pStream->IsInline())
    return;

  ASSERT(m_pStream.IsOwned());
  m_pDocument->AddIndirectObject(m_pStream.Release());
}

CPDF_Dictionary* CPDF_Image::GetDict() const {
  return m_pStream ? m_pStream->GetDict() : nullptr;
}

std::unique_ptr<CPDF_Dictionary> CPDF_Image::InitJPEG(uint8_t* pData,
                                                      uint32_t size) {
  int32_t width;
  int32_t height;
  int32_t num_comps;
  int32_t bits;
  bool color_trans;
  if (!CPDF_ModuleMgr::Get()->GetJpegModule()->LoadInfo(
          pData, size, &width, &height, &num_comps, &bits, &color_trans)) {
    return nullptr;
  }

  auto pDict =
      pdfium::MakeUnique<CPDF_Dictionary>(m_pDocument->GetByteStringPool());
  pDict->SetNewFor<CPDF_Name>("Type", "XObject");
  pDict->SetNewFor<CPDF_Name>("Subtype", "Image");
  pDict->SetNewFor<CPDF_Number>("Width", width);
  pDict->SetNewFor<CPDF_Number>("Height", height);
  const char* csname = nullptr;
  if (num_comps == 1) {
    csname = "DeviceGray";
  } else if (num_comps == 3) {
    csname = "DeviceRGB";
  } else if (num_comps == 4) {
    csname = "DeviceCMYK";
    CPDF_Array* pDecode = pDict->SetNewFor<CPDF_Array>("Decode");
    for (int n = 0; n < 4; n++) {
      pDecode->AddNew<CPDF_Number>(1);
      pDecode->AddNew<CPDF_Number>(0);
    }
  }
  pDict->SetNewFor<CPDF_Name>("ColorSpace", csname);
  pDict->SetNewFor<CPDF_Number>("BitsPerComponent", bits);
  pDict->SetNewFor<CPDF_Name>("Filter", "DCTDecode");
  if (!color_trans) {
    CPDF_Dictionary* pParms = pDict->SetNewFor<CPDF_Dictionary>("DecodeParms");
    pParms->SetNewFor<CPDF_Number>("ColorTransform", 0);
  }
  m_bIsMask = false;
  m_Width = width;
  m_Height = height;
  if (!m_pStream)
    m_pStream = pdfium::MakeUnique<CPDF_Stream>();
  return pDict;
}

void CPDF_Image::SetJpegImage(const RetainPtr<IFX_SeekableReadStream>& pFile) {
  uint32_t size = pdfium::base::checked_cast<uint32_t>(pFile->GetSize());
  if (!size)
    return;

  uint32_t dwEstimateSize = std::min(size, 8192U);
  std::vector<uint8_t> data(dwEstimateSize);
  if (!pFile->ReadBlock(data.data(), 0, dwEstimateSize))
    return;

  std::unique_ptr<CPDF_Dictionary> pDict =
      InitJPEG(data.data(), dwEstimateSize);
  if (!pDict && size > dwEstimateSize) {
    data.resize(size);
    pFile->ReadBlock(data.data(), 0, size);
    pDict = InitJPEG(data.data(), size);
  }
  if (!pDict)
    return;

  m_pStream->InitStreamFromFile(pFile, std::move(pDict));
}

void CPDF_Image::SetJpegImageInline(
    const RetainPtr<IFX_SeekableReadStream>& pFile) {
  uint32_t size = pdfium::base::checked_cast<uint32_t>(pFile->GetSize());
  if (!size)
    return;

  std::vector<uint8_t> data(size);
  if (!pFile->ReadBlock(data.data(), 0, size))
    return;

  std::unique_ptr<CPDF_Dictionary> pDict = InitJPEG(data.data(), size);
  if (!pDict)
    return;

  m_pStream->InitStream(&(data[0]), size, std::move(pDict));
}

void CPDF_Image::SetImage(const RetainPtr<CFX_DIBitmap>& pBitmap) {
  int32_t BitmapWidth = pBitmap->GetWidth();
  int32_t BitmapHeight = pBitmap->GetHeight();
  if (BitmapWidth < 1 || BitmapHeight < 1)
    return;

  auto pDict =
      pdfium::MakeUnique<CPDF_Dictionary>(m_pDocument->GetByteStringPool());
  pDict->SetNewFor<CPDF_Name>("Type", "XObject");
  pDict->SetNewFor<CPDF_Name>("Subtype", "Image");
  pDict->SetNewFor<CPDF_Number>("Width", BitmapWidth);
  pDict->SetNewFor<CPDF_Number>("Height", BitmapHeight);

  const int32_t bpp = pBitmap->GetBPP();
  size_t dest_pitch = 0;
  bool bCopyWithoutAlpha = true;
  if (bpp == 1) {
    int32_t reset_a = 0;
    int32_t reset_r = 0;
    int32_t reset_g = 0;
    int32_t reset_b = 0;
    int32_t set_a = 0;
    int32_t set_r = 0;
    int32_t set_g = 0;
    int32_t set_b = 0;
    if (!pBitmap->IsAlphaMask()) {
      std::tie(reset_a, reset_r, reset_g, reset_b) =
          ArgbDecode(pBitmap->GetPaletteArgb(0));
      std::tie(set_a, set_r, set_g, set_b) =
          ArgbDecode(pBitmap->GetPaletteArgb(1));
    }
    if (set_a == 0 || reset_a == 0) {
      pDict->SetNewFor<CPDF_Boolean>("ImageMask", true);
      if (reset_a == 0) {
        CPDF_Array* pArray = pDict->SetNewFor<CPDF_Array>("Decode");
        pArray->AddNew<CPDF_Number>(1);
        pArray->AddNew<CPDF_Number>(0);
      }
    } else {
      CPDF_Array* pCS = pDict->SetNewFor<CPDF_Array>("ColorSpace");
      pCS->AddNew<CPDF_Name>("Indexed");
      pCS->AddNew<CPDF_Name>("DeviceRGB");
      pCS->AddNew<CPDF_Number>(1);
      ByteString ct;
      char* pBuf = ct.GetBuffer(6);
      pBuf[0] = (char)reset_r;
      pBuf[1] = (char)reset_g;
      pBuf[2] = (char)reset_b;
      pBuf[3] = (char)set_r;
      pBuf[4] = (char)set_g;
      pBuf[5] = (char)set_b;
      ct.ReleaseBuffer(6);
      pCS->AddNew<CPDF_String>(ct, true);
    }
    pDict->SetNewFor<CPDF_Number>("BitsPerComponent", 1);
    dest_pitch = (BitmapWidth + 7) / 8;
  } else if (bpp == 8) {
    int32_t iPalette = pBitmap->GetPaletteSize();
    if (iPalette > 0) {
      CPDF_Array* pCS = m_pDocument->NewIndirect<CPDF_Array>();
      pCS->AddNew<CPDF_Name>("Indexed");
      pCS->AddNew<CPDF_Name>("DeviceRGB");
      pCS->AddNew<CPDF_Number>(iPalette - 1);
      std::unique_ptr<uint8_t, FxFreeDeleter> pColorTable(
          FX_Alloc2D(uint8_t, iPalette, 3));
      uint8_t* ptr = pColorTable.get();
      for (int32_t i = 0; i < iPalette; i++) {
        uint32_t argb = pBitmap->GetPaletteArgb(i);
        ptr[0] = (uint8_t)(argb >> 16);
        ptr[1] = (uint8_t)(argb >> 8);
        ptr[2] = (uint8_t)argb;
        ptr += 3;
      }
      auto pNewDict =
          pdfium::MakeUnique<CPDF_Dictionary>(m_pDocument->GetByteStringPool());
      CPDF_Stream* pCTS = m_pDocument->NewIndirect<CPDF_Stream>(
          std::move(pColorTable), iPalette * 3, std::move(pNewDict));
      pCS->AddNew<CPDF_Reference>(m_pDocument.Get(), pCTS->GetObjNum());
      pDict->SetNewFor<CPDF_Reference>("ColorSpace", m_pDocument.Get(),
                                       pCS->GetObjNum());
    } else {
      pDict->SetNewFor<CPDF_Name>("ColorSpace", "DeviceGray");
    }
    pDict->SetNewFor<CPDF_Number>("BitsPerComponent", 8);
    dest_pitch = BitmapWidth;
  } else {
    pDict->SetNewFor<CPDF_Name>("ColorSpace", "DeviceRGB");
    pDict->SetNewFor<CPDF_Number>("BitsPerComponent", 8);
    dest_pitch = BitmapWidth * 3;
    bCopyWithoutAlpha = false;
  }

  RetainPtr<CFX_DIBitmap> pMaskBitmap;
  if (pBitmap->HasAlpha())
    pMaskBitmap = pBitmap->CloneAlphaMask();

  if (pMaskBitmap) {
    int32_t maskWidth = pMaskBitmap->GetWidth();
    int32_t maskHeight = pMaskBitmap->GetHeight();
    std::unique_ptr<uint8_t, FxFreeDeleter> mask_buf;
    int32_t mask_size = 0;
    auto pMaskDict =
        pdfium::MakeUnique<CPDF_Dictionary>(m_pDocument->GetByteStringPool());
    pMaskDict->SetNewFor<CPDF_Name>("Type", "XObject");
    pMaskDict->SetNewFor<CPDF_Name>("Subtype", "Image");
    pMaskDict->SetNewFor<CPDF_Number>("Width", maskWidth);
    pMaskDict->SetNewFor<CPDF_Number>("Height", maskHeight);
    pMaskDict->SetNewFor<CPDF_Name>("ColorSpace", "DeviceGray");
    pMaskDict->SetNewFor<CPDF_Number>("BitsPerComponent", 8);
    if (pMaskBitmap->GetFormat() != FXDIB_1bppMask) {
      mask_buf.reset(FX_Alloc2D(uint8_t, maskHeight, maskWidth));
      mask_size = maskHeight * maskWidth;  // Safe since checked alloc returned.
      for (int32_t a = 0; a < maskHeight; a++) {
        memcpy(mask_buf.get() + a * maskWidth, pMaskBitmap->GetScanline(a),
               maskWidth);
      }
    }
    pMaskDict->SetNewFor<CPDF_Number>("Length", mask_size);
    CPDF_Stream* pNewStream = m_pDocument->NewIndirect<CPDF_Stream>(
        std::move(mask_buf), mask_size, std::move(pMaskDict));
    pDict->SetNewFor<CPDF_Reference>("SMask", m_pDocument.Get(),
                                     pNewStream->GetObjNum());
  }

  uint8_t* src_buf = pBitmap->GetBuffer();
  int32_t src_pitch = pBitmap->GetPitch();
  uint8_t* dest_buf = FX_Alloc2D(uint8_t, dest_pitch, BitmapHeight);
  // Safe as checked alloc returned.
  size_t dest_size = dest_pitch * BitmapHeight;
  uint8_t* pDest = dest_buf;
  if (bCopyWithoutAlpha) {
    for (int32_t i = 0; i < BitmapHeight; i++) {
      memcpy(pDest, src_buf, dest_pitch);
      pDest += dest_pitch;
      src_buf += src_pitch;
    }
  } else {
    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++) {
        float alpha = 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;
      }

      pDest += dest_pitch;
      dest_offset = 0;
    }
  }
  if (!m_pStream)
    m_pStream = pdfium::MakeUnique<CPDF_Stream>();

  m_pStream->InitStream(dest_buf, dest_size, std::move(pDict));
  m_bIsMask = pBitmap->IsAlphaMask();
  m_Width = BitmapWidth;
  m_Height = BitmapHeight;
  FX_Free(dest_buf);
}

void CPDF_Image::ResetCache(CPDF_Page* pPage,
                            const RetainPtr<CFX_DIBitmap>& pBitmap) {
  RetainPtr<CPDF_Image> pHolder(this);
  pPage->GetRenderCache()->ResetBitmap(pHolder, pBitmap);
}

RetainPtr<CFX_DIBSource> CPDF_Image::LoadDIBSource() const {
  auto source = pdfium::MakeRetain<CPDF_DIBSource>();
  if (!source->Load(m_pDocument.Get(), m_pStream.Get()))
    return nullptr;

  if (!source->IsJBigImage())
    return source;

  CPDF_DIBSource::LoadState ret = CPDF_DIBSource::LoadState::kContinue;
  while (ret == CPDF_DIBSource::LoadState::kContinue)
    ret = source->ContinueLoadDIBSource(nullptr);
  return ret == CPDF_DIBSource::LoadState::kSuccess ? source : nullptr;
}

RetainPtr<CFX_DIBSource> CPDF_Image::DetachBitmap() {
  return std::move(m_pDIBSource);
}

RetainPtr<CFX_DIBSource> CPDF_Image::DetachMask() {
  return std::move(m_pMask);
}

bool CPDF_Image::StartLoadDIBSource(CPDF_Dictionary* pFormResource,
                                    CPDF_Dictionary* pPageResource,
                                    bool bStdCS,
                                    uint32_t GroupFamily,
                                    bool bLoadMask) {
  auto source = pdfium::MakeRetain<CPDF_DIBSource>();
  CPDF_DIBSource::LoadState ret = source->StartLoadDIBSource(
      m_pDocument.Get(), m_pStream.Get(), true, pFormResource, pPageResource,
      bStdCS, GroupFamily, bLoadMask);
  if (ret == CPDF_DIBSource::LoadState::kFail) {
    m_pDIBSource.Reset();
    return false;
  }
  m_pDIBSource = source;
  if (ret == CPDF_DIBSource::LoadState::kContinue)
    return true;

  m_pMask = source->DetachMask();
  m_MatteColor = source->GetMatteColor();
  return false;
}

bool CPDF_Image::Continue(IFX_PauseIndicator* pPause) {
  RetainPtr<CPDF_DIBSource> pSource = m_pDIBSource.As<CPDF_DIBSource>();
  CPDF_DIBSource::LoadState ret = pSource->ContinueLoadDIBSource(pPause);
  if (ret == CPDF_DIBSource::LoadState::kContinue)
    return true;

  if (ret == CPDF_DIBSource::LoadState::kSuccess) {
    m_pMask = pSource->DetachMask();
    m_MatteColor = pSource->GetMatteColor();
  } else {
    m_pDIBSource.Reset();
  }
  return false;
}