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 "SkDocument.h"
9 #include "SkCanvas.h"
10 #include "SkImageGenerator.h"
11 #include "SkData.h"
12 #include "SkStream.h"
13
14 #include "Resources.h"
15 #include "Test.h"
16
17 // Returned bitmap is lazy. Only lazy bitmaps hold onto the original data.
bitmap_from_data(SkData * data)18 static SkBitmap bitmap_from_data(SkData* data) {
19 SkASSERT(data);
20 SkBitmap bm;
21 SkInstallDiscardablePixelRef(data, &bm);
22 return bm;
23 }
24
is_subset_of(SkData * smaller,SkData * larger)25 static bool is_subset_of(SkData* smaller, SkData* larger) {
26 SkASSERT(smaller && larger);
27 if (smaller->size() > larger->size()) {
28 return false;
29 }
30 size_t size = smaller->size();
31 size_t size_diff = larger->size() - size;
32 for (size_t i = 0; i <= size_diff; ++i) {
33 if (0 == memcmp(larger->bytes() + i, smaller->bytes(), size)) {
34 return true;
35 }
36 }
37 return false;
38 }
39
40
load_resource(skiatest::Reporter * r,const char * test,const char * filename)41 static SkData* load_resource(
42 skiatest::Reporter* r, const char* test, const char* filename) {
43 SkString path(GetResourcePath(filename));
44 SkData* data = SkData::NewFromFileName(path.c_str());
45 if (!data && r->verbose()) {
46 SkDebugf("\n%s: Resource '%s' can not be found.\n",
47 test, filename);
48 }
49 return data; // May return NULL.
50 }
51
52 /**
53 * Test that for Jpeg files that use the JFIF colorspace, they are
54 * directly embedded into the PDF (without re-encoding) when that
55 * makes sense.
56 */
DEF_TEST(PDFJpegEmbedTest,r)57 DEF_TEST(PDFJpegEmbedTest, r) {
58 const char test[] = "PDFJpegEmbedTest";
59 SkAutoTUnref<SkData> mandrillData(
60 load_resource(r, test, "mandrill_512_q075.jpg"));
61 SkAutoTUnref<SkData> cmykData(load_resource(r, test, "CMYK.jpg"));
62 if (!mandrillData || !cmykData) {
63 return;
64 }
65
66 SkDynamicMemoryWStream pdf;
67 SkAutoTUnref<SkDocument> document(SkDocument::CreatePDF(&pdf));
68 SkCanvas* canvas = document->beginPage(642, 1028);
69
70 canvas->clear(SK_ColorLTGRAY);
71
72 SkBitmap bm1(bitmap_from_data(mandrillData));
73 canvas->drawBitmap(bm1, 65.0, 0.0, NULL);
74 SkBitmap bm2(bitmap_from_data(cmykData));
75 canvas->drawBitmap(bm2, 0.0, 512.0, NULL);
76
77 canvas->flush();
78 document->endPage();
79 document->close();
80 SkAutoTUnref<SkData> pdfData(pdf.copyToData());
81 SkASSERT(pdfData);
82 pdf.reset();
83
84 REPORTER_ASSERT(r, is_subset_of(mandrillData, pdfData));
85
86 // This JPEG uses a nonstandard colorspace - it can not be
87 // embedded into the PDF directly.
88 REPORTER_ASSERT(r, !is_subset_of(cmykData, pdfData));
89 }
90
91 #include "SkJpegInfo.h"
92
DEF_TEST(JpegIdentification,r)93 DEF_TEST(JpegIdentification, r) {
94 static struct {
95 const char* path;
96 bool isJfif;
97 SkJFIFInfo::Type type;
98 } kTests[] = {{"CMYK.jpg", false, SkJFIFInfo::kGrayscale},
99 {"color_wheel.jpg", true, SkJFIFInfo::kYCbCr},
100 {"grayscale.jpg", true, SkJFIFInfo::kGrayscale},
101 {"mandrill_512_q075.jpg", true, SkJFIFInfo::kYCbCr},
102 {"randPixels.jpg", true, SkJFIFInfo::kYCbCr}};
103 for (size_t i = 0; i < SK_ARRAY_COUNT(kTests); ++i) {
104 SkAutoTUnref<SkData> data(
105 load_resource(r, "JpegIdentification", kTests[i].path));
106 if (!data) {
107 continue;
108 }
109 SkJFIFInfo info;
110 bool isJfif = SkIsJFIF(data, &info);
111 if (isJfif != kTests[i].isJfif) {
112 ERRORF(r, "%s failed isJfif test", kTests[i].path);
113 continue;
114 }
115 if (!isJfif) {
116 continue; // not applicable
117 }
118 if (kTests[i].type != info.fType) {
119 ERRORF(r, "%s failed jfif type test", kTests[i].path);
120 continue;
121 }
122 if (r->verbose()) {
123 SkDebugf("\nJpegIdentification: %s [%d x %d]\n", kTests[i].path,
124 info.fWidth, info.fHeight);
125 }
126 }
127 }
128