fpdfedit_embeddertest.cpp revision 4d3acf4ec42bf6e838f9060103aff98fbf170794 
1// Copyright 2016 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#include <memory>
6#include <string>
7
8#include "public/fpdf_edit.h"
9#include "public/fpdfview.h"
10#include "testing/embedder_test.h"
11#include "testing/gmock/include/gmock/gmock-matchers.h"
12#include "testing/gtest/include/gtest/gtest.h"
13#include "testing/test_support.h"
14
15class FPDFEditEmbeddertest : public EmbedderTest, public TestSaver {};
16
17namespace {
18
19const char kExpectedPDF[] =
20    "%PDF-1.7\r\n"
21    "%\xA1\xB3\xC5\xD7\r\n"
22    "1 0 obj\r\n"
23    "<</Pages 2 0 R /Type/Catalog>>\r\n"
24    "endobj\r\n"
25    "2 0 obj\r\n"
26    "<</Count 1/Kids\\[ 4 0 R \\]/Type/Pages>>\r\n"
27    "endobj\r\n"
28    "3 0 obj\r\n"
29    "<</CreationDate\\(D:.*\\)/Creator\\(PDFium\\)>>\r\n"
30    "endobj\r\n"
31    "4 0 obj\r\n"
32    "<</Contents 5 0 R /MediaBox\\[ 0 0 640 480\\]"
33    "/Parent 2 0 R /Resources<<>>/Rotate 0/Type/Page"
34    ">>\r\n"
35    "endobj\r\n"
36    "5 0 obj\r\n"
37    "<</Filter/FlateDecode/Length 8>>stream\r\n"
38    // Character '_' is matching '\0' (see comment below).
39    "x\x9C\x3____\x1\r\n"
40    "endstream\r\n"
41    "endobj\r\n"
42    "xref\r\n"
43    "0 6\r\n"
44    "0000000000 65535 f\r\n"
45    "0000000017 00000 n\r\n"
46    "0000000066 00000 n\r\n"
47    "0000000122 00000 n\r\n"
48    "0000000192 00000 n\r\n"
49    "0000000301 00000 n\r\n"
50    "trailer\r\n"
51    "<<\r\n"
52    "/Root 1 0 R\r\n"
53    "/Info 3 0 R\r\n"
54    "/Size 6/ID\\[<.*><.*>\\]>>\r\n"
55    "startxref\r\n"
56    "379\r\n"
57    "%%EOF\r\n";
58
59int GetBlockFromString(void* param,
60                       unsigned long pos,
61                       unsigned char* buf,
62                       unsigned long size) {
63  std::string* new_file = static_cast<std::string*>(param);
64  if (!new_file || pos + size < pos)
65    return 0;
66
67  unsigned long file_size = new_file->size();
68  if (pos + size > file_size)
69    return 0;
70
71  memcpy(buf, new_file->data() + pos, size);
72  return 1;
73}
74
75}  // namespace
76
77TEST_F(FPDFEditEmbeddertest, EmptyCreation) {
78  EXPECT_TRUE(CreateEmptyDocument());
79  FPDF_PAGE page = FPDFPage_New(document(), 0, 640.0, 480.0);
80  EXPECT_NE(nullptr, page);
81  EXPECT_TRUE(FPDFPage_GenerateContent(page));
82  EXPECT_TRUE(FPDF_SaveAsCopy(document(), this, 0));
83
84  // The MatchesRegexp doesn't support embedded NUL ('\0') characters. They are
85  // replaced by '_' for the purpose of the test.
86  std::string result = GetString();
87  std::replace(result.begin(), result.end(), '\0', '_');
88  EXPECT_THAT(result, testing::MatchesRegex(
89                          std::string(kExpectedPDF, sizeof(kExpectedPDF))));
90  FPDF_ClosePage(page);
91}
92
93// Regression test for https://crbug.com/667012
94TEST_F(FPDFEditEmbeddertest, RasterizePDF) {
95  const char kAllBlackMd5sum[] = "5708fc5c4a8bd0abde99c8e8f0390615";
96
97  // Get the bitmap for the original document/
98  FPDF_BITMAP orig_bitmap;
99  {
100    EXPECT_TRUE(OpenDocument("black.pdf"));
101    FPDF_PAGE orig_page = LoadPage(0);
102    EXPECT_NE(nullptr, orig_page);
103    orig_bitmap = RenderPage(orig_page);
104    CompareBitmap(orig_bitmap, 612, 792, kAllBlackMd5sum);
105    UnloadPage(orig_page);
106  }
107
108  // Create a new document from |orig_bitmap| and save it.
109  {
110    FPDF_DOCUMENT temp_doc = FPDF_CreateNewDocument();
111    FPDF_PAGE temp_page = FPDFPage_New(temp_doc, 0, 612, 792);
112
113    // Add the bitmap to an image object and add the image object to the output
114    // page.
115    FPDF_PAGEOBJECT temp_img = FPDFPageObj_NewImgeObj(temp_doc);
116    EXPECT_TRUE(FPDFImageObj_SetBitmap(&temp_page, 1, temp_img, orig_bitmap));
117    EXPECT_TRUE(FPDFImageObj_SetMatrix(temp_img, 612, 0, 0, 792, 0, 0));
118    FPDFPage_InsertObject(temp_page, temp_img);
119    EXPECT_TRUE(FPDFPage_GenerateContent(temp_page));
120    EXPECT_TRUE(FPDF_SaveAsCopy(temp_doc, this, 0));
121    FPDF_ClosePage(temp_page);
122    FPDF_CloseDocument(temp_doc);
123  }
124  FPDFBitmap_Destroy(orig_bitmap);
125
126  // Get the generated content. Make sure it is at least as big as the original
127  // PDF.
128  std::string new_file = GetString();
129  EXPECT_GT(new_file.size(), 923U);
130
131  // Read |new_file| in, and verify its rendered bitmap.
132  {
133    FPDF_FILEACCESS file_access;
134    memset(&file_access, 0, sizeof(file_access));
135    file_access.m_FileLen = new_file.size();
136    file_access.m_GetBlock = GetBlockFromString;
137    file_access.m_Param = &new_file;
138
139    FPDF_DOCUMENT new_doc = FPDF_LoadCustomDocument(&file_access, nullptr);
140    EXPECT_EQ(1, FPDF_GetPageCount(document_));
141    FPDF_PAGE new_page = FPDF_LoadPage(new_doc, 0);
142    EXPECT_NE(nullptr, new_page);
143    int width = static_cast<int>(FPDF_GetPageWidth(new_page));
144    int height = static_cast<int>(FPDF_GetPageHeight(new_page));
145    int alpha = FPDFPage_HasTransparency(new_page) ? 1 : 0;
146    FPDF_BITMAP new_bitmap = FPDFBitmap_Create(width, height, alpha);
147    FPDF_DWORD fill_color = alpha ? 0x00000000 : 0xFFFFFFFF;
148    FPDFBitmap_FillRect(new_bitmap, 0, 0, width, height, fill_color);
149    FPDF_RenderPageBitmap(new_bitmap, new_page, 0, 0, width, height, 0, 0);
150    CompareBitmap(new_bitmap, 612, 792, kAllBlackMd5sum);
151    FPDF_ClosePage(new_page);
152    FPDF_CloseDocument(new_doc);
153    FPDFBitmap_Destroy(new_bitmap);
154  }
155}
156