1 /*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "include/codec/SkEncodedOrigin.h"
9 #include "include/codec/SkJpegDecoder.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkData.h"
13 #include "include/core/SkDocument.h"
14 #include "include/core/SkImage.h"
15 #include "include/core/SkRefCnt.h"
16 #include "include/core/SkSize.h"
17 #include "include/core/SkStream.h"
18 #include "include/core/SkTypes.h"
19 #include "include/docs/SkPDFDocument.h"
20 #include "include/private/SkEncodedInfo.h"
21 #include "src/pdf/SkPDFBitmap.h"
22 #include "tests/Test.h"
23 #include "tools/Resources.h"
24
25 #include <array>
26 #include <cstdint>
27 #include <cstring>
28
is_subset_of(SkData * smaller,SkData * larger)29 static bool is_subset_of(SkData* smaller, SkData* larger) {
30 SkASSERT(smaller && larger);
31 if (smaller->size() > larger->size()) {
32 return false;
33 }
34 size_t size = smaller->size();
35 size_t size_diff = larger->size() - size;
36 for (size_t i = 0; i <= size_diff; ++i) {
37 if (0 == memcmp(larger->bytes() + i, smaller->bytes(), size)) {
38 return true;
39 }
40 }
41 return false;
42 }
43
44
load_resource(skiatest::Reporter * r,const char * test,const char * filename)45 static sk_sp<SkData> load_resource(
46 skiatest::Reporter* r, const char* test, const char* filename) {
47 sk_sp<SkData> data = GetResourceAsData(filename);
48 if (!data) {
49 INFOF(r, "\n%s: Resource '%s' can not be found.\n",
50 test, filename);
51 }
52 return data; // May return nullptr.
53 }
54
55 /**
56 * Test that for Jpeg files that use the JFIF colorspace, they are
57 * directly embedded into the PDF (without re-encoding) when that
58 * makes sense.
59 */
DEF_TEST(SkPDF_JpegEmbedTest,r)60 DEF_TEST(SkPDF_JpegEmbedTest, r) {
61 REQUIRE_PDF_DOCUMENT(SkPDF_JpegEmbedTest, r);
62 const char test[] = "SkPDF_JpegEmbedTest";
63 sk_sp<SkData> mandrillData(load_resource(r, test, "images/mandrill_512_q075.jpg"));
64 sk_sp<SkData> cmykData(load_resource(r, test, "images/CMYK.jpg"));
65 sk_sp<SkData> yuvICCData(load_resource(r, test, "images/crbug999986.jpeg"));
66 sk_sp<SkData> cmykICCData(load_resource(r, test, "images/crbug1465627.jpeg"));
67
68 if (!mandrillData || !cmykData || !yuvICCData || !cmykICCData) {
69 REPORTER_ASSERT(r, false, "Could not load all images");
70 return;
71 }
72 ////////////////////////////////////////////////////////////////////////////
73 SkDynamicMemoryWStream pdf;
74 auto document = SkPDF::MakeDocument(&pdf);
75 SkCanvas* canvas = document->beginPage(642, 2048);
76
77 canvas->clear(SK_ColorLTGRAY);
78
79 sk_sp<SkImage> im1(SkImages::DeferredFromEncodedData(mandrillData));
80 canvas->drawImage(im1, 65.0, 0.0);
81 sk_sp<SkImage> im2(SkImages::DeferredFromEncodedData(cmykData));
82 canvas->drawImage(im2, 0.0, 512.0);
83
84 // This should be the same blue as the dark spot seen in the image.
85 SkPaint bluePaint;
86 bluePaint.setColor(SkColorSetARGB(255, 0, 59, 103));
87 canvas->drawRect(SkRect::MakeXYWH(0, 1000, 642, 24), bluePaint);
88 sk_sp<SkImage> im3(SkImages::DeferredFromEncodedData(yuvICCData));
89 canvas->drawImage(im3, 0.0, 1024.0);
90
91 sk_sp<SkImage> im4(SkImages::DeferredFromEncodedData(cmykICCData));
92 canvas->drawImage(im4, 0.0, 1536.0);
93
94 document->endPage();
95 document->close();
96 sk_sp<SkData> pdfData = pdf.detachAsData();
97 SkASSERT(pdfData);
98
99 #ifndef SK_PDF_BASE85_BINARY
100 REPORTER_ASSERT(r, is_subset_of(mandrillData.get(), pdfData.get()));
101 #endif
102
103 // This JPEG uses a nonstandard colorspace - it can not be
104 // embedded into the PDF directly.
105 REPORTER_ASSERT(r, !is_subset_of(cmykData.get(), pdfData.get()));
106
107 if ((false)) {
108 SkFILEWStream s("/tmp/jpegembed.pdf");
109 REPORTER_ASSERT(r, s.write(pdfData->data(), pdfData->size()));
110 s.flush();
111 s.fsync();
112 }
113 }
114
115 #ifdef SK_SUPPORT_PDF
116
117 struct SkJFIFInfo {
118 SkISize fSize;
119 enum Type {
120 kGrayscale,
121 kYCbCr,
122 } fType;
123 };
SkIsJFIF(const SkData * data,SkJFIFInfo * info)124 bool SkIsJFIF(const SkData* data, SkJFIFInfo* info) {
125 static constexpr const SkCodecs::Decoder decoders[] = {
126 SkJpegDecoder::Decoder(),
127 };
128
129 if (!data) {
130 return false;
131 }
132 std::unique_ptr<SkCodec> codec = SkCodec::MakeFromData(sk_ref_sp(data), decoders);
133 if (!codec) {
134 return false;
135 }
136
137 SkISize jpegSize = codec->dimensions();
138 SkEncodedInfo::Color jpegColorType = SkPDFBitmap::GetEncodedInfo(*codec).color();
139 SkEncodedOrigin exifOrientation = codec->getOrigin();
140
141 bool yuv = jpegColorType == SkEncodedInfo::kYUV_Color;
142 bool goodColorType = yuv || jpegColorType == SkEncodedInfo::kGray_Color;
143 if (goodColorType && kTopLeft_SkEncodedOrigin == exifOrientation) {
144 if (info) {
145 *info = {jpegSize, yuv ? SkJFIFInfo::kYCbCr : SkJFIFInfo::kGrayscale};
146 }
147 return true;
148 }
149 return false;
150 }
151
DEF_TEST(SkPDF_JpegIdentification,r)152 DEF_TEST(SkPDF_JpegIdentification, r) {
153 static struct {
154 const char* path;
155 bool isJfif;
156 SkJFIFInfo::Type type;
157 } kTests[] = {{"images/CMYK.jpg", false, SkJFIFInfo::kGrayscale},
158 {"images/color_wheel.jpg", true, SkJFIFInfo::kYCbCr},
159 {"images/grayscale.jpg", true, SkJFIFInfo::kGrayscale},
160 {"images/mandrill_512_q075.jpg", true, SkJFIFInfo::kYCbCr},
161 {"images/randPixels.jpg", true, SkJFIFInfo::kYCbCr}};
162 for (size_t i = 0; i < std::size(kTests); ++i) {
163 sk_sp<SkData> data(load_resource(r, "JpegIdentification", kTests[i].path));
164 if (!data) {
165 continue;
166 }
167 SkJFIFInfo info;
168 bool isJfif = SkIsJFIF(data.get(), &info);
169 if (isJfif != kTests[i].isJfif) {
170 ERRORF(r, "%s failed isJfif test", kTests[i].path);
171 continue;
172 }
173 if (!isJfif) {
174 continue; // not applicable
175 }
176 if (kTests[i].type != info.fType) {
177 ERRORF(r, "%s failed jfif type test", kTests[i].path);
178 continue;
179 }
180 INFOF(r, "\nJpegIdentification: %s [%d x %d]\n", kTests[i].path,
181 info.fSize.width(), info.fSize.height());
182 }
183
184 // Test several malformed jpegs.
185 SkJFIFInfo info;
186 {
187 static const char goodJpeg[] =
188 "\377\330\377\340\0\20JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\20\13\14"
189 "\16\14\n\20\16\r\16\22\21\20\23\30(\32\30\26\26\0301#%\35(:3=<9387"
190 "@H\\N@DWE78PmQW_bghg>Mqypdx\\egc\377\333\0C\1\21\22\22\30\25\30/\32"
191 "\32/cB8Bcccccccccccccccccccccccccccccccccccccccccccccccccc\377\300"
192 "\0\21\10\0\10\0\10\3\1\"\0\2\21\1\3\21\1\377\304\0\37\0\0\1\5\1\1\1"
193 "\1\1\1\0\0\0\0\0\0\0\0\1\2\3\4\5\6\7\10\t\n\13\377\304\0\265\20\0\2"
194 "\1\3\3\2\4\3\5\5\4\4\0\0\1}\1\2\3\0\4\21\5\22!1A\6\23Qa\7\"q\0242\201"
195 "\221\241\10#B\261\301\25R\321\360$3br\202\t\n\26\27\30\31\32%&'()*"
196 "456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz\203\204\205\206\207\210\211"
197 "\212\222\223\224\225\226\227\230\231\232\242\243\244\245\246\247\250"
198 "\251\252\262\263\264\265\266\267\270\271\272\302\303\304\305\306\307"
199 "\310\311\312\322\323\324\325\326\327\330\331\332\341\342\343\344\345"
200 "\346\347\350\351\352\361\362\363\364\365\366\367\370\371\372\377\304"
201 "\0\37\1\0\3\1\1\1\1\1\1\1\1\1\0\0\0\0\0\0\1\2\3\4\5\6\7\10\t\n\13\377"
202 "\304\0\265\21\0\2\1\2\4\4\3\4\7\5\4\4\0\1\2w\0\1\2\3\21\4\5!1\6\22"
203 "AQ\7aq\23\"2\201\10\24B\221\241\261\301\t#3R\360\25br\321\n\26$4\341"
204 "%\361\27\30\31\32&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz\202\203"
205 "\204\205\206\207\210\211\212\222\223\224\225\226\227\230\231\232\242"
206 "\243\244\245\246\247\250\251\252\262\263\264\265\266\267\270\271\272"
207 "\302\303\304\305\306\307\310\311\312\322\323\324\325\326\327\330\331"
208 "\332\342\343\344\345\346\347\350\351\352\362\363\364\365\366\367\370"
209 "\371\372\377\332\0\14\3\1\0\2\21\3\21\0?\0\216M\352\214\25\271\224"
210 "\262\310\253\363tl\22209\35O~\237\\\24QZ\306Mh\216\252i\364ml\177\377"
211 "\331";
212 size_t goodJpegLength = 659;
213 auto data = SkData::MakeWithoutCopy(goodJpeg, goodJpegLength);
214 REPORTER_ASSERT(r, SkIsJFIF(data.get(), &info));
215 REPORTER_ASSERT(r, info.fSize == (SkISize{8, 8}));
216 REPORTER_ASSERT(r, info.fType == SkJFIFInfo::kYCbCr);
217
218 // Not long enough to read first (SOI) segment marker.
219 data = SkData::MakeWithoutCopy(goodJpeg, 1);
220 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
221
222 // Not long enough to read second segment (APP0) marker.
223 data = SkData::MakeWithoutCopy(goodJpeg, 3);
224 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
225
226 // Not long enough to read second segment's length.
227 data = SkData::MakeWithoutCopy(goodJpeg, 5);
228 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
229
230 // APP0 segment is truncated.
231 data = SkData::MakeWithoutCopy(goodJpeg, 7);
232 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
233
234 // Missing SOF segment.
235 data = SkData::MakeWithoutCopy(goodJpeg, 89);
236 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
237 }
238 {
239 // JFIF tag missing.
240 static const char jpeg[] =
241 "\377\330\377\340\0\20JFIX\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
242 "\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
243 "\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
244 "\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
245 "22222222222222\377\300\0\21\10\2\0\2\0\3\1\"\0\2\21\1\3\21\001";
246 size_t jpegLength = 177;
247 auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
248 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
249 }
250 {
251 // APP0 segment short (byte 6 changed).
252 static const char jpeg[] =
253 "\377\330\377\340\0\5JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
254 "\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
255 "\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
256 "\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
257 "22222222222222\377\300\0\21\10\2\0\2\0\3\1\"\0\2\21\1\3\21\001";
258 size_t jpegLength = 177;
259 auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
260 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
261 }
262 {
263 // SOF segment short. ('\21' replaced with '\5')
264 static const char jpeg[] =
265 "\377\330\377\340\0\20JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
266 "\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
267 "\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
268 "\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
269 "22222222222222\377\300\0\5\10\2\0\2\0\3\1\"\0\2\21\1\3\21\001";
270 size_t jpegLength = 177;
271 auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
272 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
273 }
274 {
275 // Unsupported 12-bit components. ('\10' replaced with '\14')
276 static const char jpeg[] =
277 "\377\330\377\340\0\20JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
278 "\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
279 "\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
280 "\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
281 "22222222222222\377\300\0\21\14\2\0\2\0\3\1\"\0\2\21\1\3\21\001";
282 size_t jpegLength = 177;
283 auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
284 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
285 }
286 {
287 // Two color channels. ('\3' replaced with '\2')
288 static const char jpeg[] =
289 "\377\330\377\340\0\20JFIF\0\1\1\0\0\1\0\1\0\0\377\333\0C\0\10\6\6\7"
290 "\6\5\10\7\7\7\t\t\10\n\14\24\r\14\13\13\14\31\22\23\17\24\35\32\37"
291 "\36\35\32\34\34 $.' \",#\34\34(7),01444\37'9=82<.342\377\333\0C\1\t"
292 "\t\t\14\13\14\30\r\r\0302!\34!222222222222222222222222222222222222"
293 "22222222222222\377\300\0\21\10\2\0\2\0\2\1\"\0\2\21\1\3\21\001";
294 size_t jpegLength = 177;
295 auto data = SkData::MakeWithoutCopy(jpeg, jpegLength);
296 REPORTER_ASSERT(r, !SkIsJFIF(data.get(), &info));
297 }
298 }
299 #endif
300
