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
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkDocument.h"
#include "SkCanvas.h"
#include "SkImageGenerator.h"
#include "SkData.h"
#include "SkStream.h"
#include "Resources.h"
#include "Test.h"
// Returned bitmap is lazy. Only lazy bitmaps hold onto the original data.
static SkBitmap bitmap_from_data(SkData* data) {
SkASSERT(data);
SkBitmap bm;
SkDEPRECATED_InstallDiscardablePixelRef(data, &bm);
return bm;
}
static bool is_subset_of(SkData* smaller, SkData* larger) {
SkASSERT(smaller && larger);
if (smaller->size() > larger->size()) {
return false;
}
size_t size = smaller->size();
size_t size_diff = larger->size() - size;
for (size_t i = 0; i <= size_diff; ++i) {
if (0 == memcmp(larger->bytes() + i, smaller->bytes(), size)) {
return true;
}
}
return false;
}
static SkData* load_resource(
skiatest::Reporter* r, const char* test, const char* filename) {
SkString path(GetResourcePath(filename));
SkData* data = SkData::NewFromFileName(path.c_str());
if (!data) {
INFOF(r, "\n%s: Resource '%s' can not be found.\n",
test, filename);
}
return data; // May return nullptr.
}
/**
* Test that for Jpeg files that use the JFIF colorspace, they are
* directly embedded into the PDF (without re-encoding) when that
* makes sense.
*/
DEF_TEST(PDFJpegEmbedTest, r) {
const char test[] = "PDFJpegEmbedTest";
sk_sp<SkData> mandrillData(load_resource(r, test, "mandrill_512_q075.jpg"));
sk_sp<SkData> cmykData(load_resource(r, test, "CMYK.jpg"));
if (!mandrillData || !cmykData) {
return;
}
////////////////////////////////////////////////////////////////////////////
SkDynamicMemoryWStream pdf;
sk_sp<SkDocument> document(SkDocument::MakePDF(&pdf));
SkCanvas* canvas = document->beginPage(642, 1028);
canvas->clear(SK_ColorLTGRAY);
SkBitmap bm1(bitmap_from_data(mandrillData.get()));
canvas->drawBitmap(bm1, 65.0, 0.0, nullptr);
SkBitmap bm2(bitmap_from_data(cmykData.get()));
canvas->drawBitmap(bm2, 0.0, 512.0, nullptr);
canvas->flush();
document->endPage();
document->close();
SkAutoTUnref<SkData> pdfData(pdf.copyToData());
SkASSERT(pdfData);
pdf.reset();
REPORTER_ASSERT(r, is_subset_of(mandrillData.get(), pdfData.get()));
// This JPEG uses a nonstandard colorspace - it can not be
// embedded into the PDF directly.
REPORTER_ASSERT(r, !is_subset_of(cmykData.get(), pdfData.get()));
////////////////////////////////////////////////////////////////////////////
pdf.reset();
document = SkDocument::MakePDF(&pdf);
canvas = document->beginPage(642, 1028);
canvas->clear(SK_ColorLTGRAY);
sk_sp<SkImage> im1(SkImage::MakeFromEncoded(mandrillData));
canvas->drawImage(im1.get(), 65.0, 0.0, nullptr);
sk_sp<SkImage> im2(SkImage::MakeFromEncoded(cmykData));
canvas->drawImage(im2.get(), 0.0, 512.0, nullptr);
canvas->flush();
document->endPage();
document->close();
pdfData.reset(pdf.copyToData());
SkASSERT(pdfData);
pdf.reset();
REPORTER_ASSERT(r, is_subset_of(mandrillData.get(), pdfData.get()));
// This JPEG uses a nonstandard colorspace - it can not be
// embedded into the PDF directly.
REPORTER_ASSERT(r, !is_subset_of(cmykData.get(), pdfData.get()));
}
#include "SkJpegInfo.h"
DEF_TEST(JpegIdentification, r) {
static struct {
const char* path;
bool isJfif;
SkJFIFInfo::Type type;
} kTests[] = {{"CMYK.jpg", false, SkJFIFInfo::kGrayscale},
{"color_wheel.jpg", true, SkJFIFInfo::kYCbCr},
{"grayscale.jpg", true, SkJFIFInfo::kGrayscale},
{"mandrill_512_q075.jpg", true, SkJFIFInfo::kYCbCr},
{"randPixels.jpg", true, SkJFIFInfo::kYCbCr}};
for (size_t i = 0; i < SK_ARRAY_COUNT(kTests); ++i) {
SkAutoTUnref<SkData> data(
load_resource(r, "JpegIdentification", kTests[i].path));
if (!data) {
continue;
}
SkJFIFInfo info;
bool isJfif = SkIsJFIF(data, &info);
if (isJfif != kTests[i].isJfif) {
ERRORF(r, "%s failed isJfif test", kTests[i].path);
continue;
}
if (!isJfif) {
continue; // not applicable
}
if (kTests[i].type != info.fType) {
ERRORF(r, "%s failed jfif type test", kTests[i].path);
continue;
}
INFOF(r, "\nJpegIdentification: %s [%d x %d]\n", kTests[i].path,
info.fSize.width(), info.fSize.height());
}
}
|
