1 /*
2 * Copyright 2013 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 "SkPDFResourceDict.h"
9 #include "SkPostConfig.h"
10
11 // Sanity check that the values of enum SkPDFResourceType correspond to the
12 // expected values as defined in the arrays below.
13 // If these are failing, you may need to update the resource_type_prefixes
14 // and resource_type_names arrays below.
15 static_assert(SkPDFResourceDict::kExtGState_ResourceType == 0, "resource_type_mismatch");
16 static_assert(SkPDFResourceDict::kPattern_ResourceType == 1, "resource_type_mismatch");
17 static_assert(SkPDFResourceDict::kXObject_ResourceType == 2, "resource_type_mismatch");
18 static_assert(SkPDFResourceDict::kFont_ResourceType == 3, "resource_type_mismatch");
19
20 static const char resource_type_prefixes[] = {
21 'G',
22 'P',
23 'X',
24 'F'
25 };
26
27 static const char* resource_type_names[] = {
28 "ExtGState",
29 "Pattern",
30 "XObject",
31 "Font"
32 };
33
get_resource_type_prefix(SkPDFResourceDict::SkPDFResourceType type)34 static char get_resource_type_prefix(
35 SkPDFResourceDict::SkPDFResourceType type) {
36 SkASSERT(type >= 0);
37 SkASSERT(type < SkPDFResourceDict::kResourceTypeCount);
38
39 return resource_type_prefixes[type];
40 }
41
get_resource_type_name(SkPDFResourceDict::SkPDFResourceType type)42 static const char* get_resource_type_name(
43 SkPDFResourceDict::SkPDFResourceType type) {
44 SkASSERT(type >= 0);
45 SkASSERT(type < SK_ARRAY_COUNT(resource_type_names));
46
47 return resource_type_names[type];
48 }
49
getResourceName(SkPDFResourceDict::SkPDFResourceType type,int key)50 SkString SkPDFResourceDict::getResourceName(
51 SkPDFResourceDict::SkPDFResourceType type, int key) {
52 SkString keyString;
53 keyString.printf("%c%d", get_resource_type_prefix(type), key);
54 return keyString;
55 }
56
add_subdict(const SkTDArray<SkPDFObject * > & resourceList,SkPDFResourceDict::SkPDFResourceType type,SkPDFDict * dst)57 static void add_subdict(
58 const SkTDArray<SkPDFObject*>& resourceList,
59 SkPDFResourceDict::SkPDFResourceType type,
60 SkPDFDict* dst) {
61 if (0 == resourceList.count()) {
62 return;
63 }
64 SkAutoTUnref<SkPDFDict> resources(new SkPDFDict);
65 for (int i = 0; i < resourceList.count(); i++) {
66 resources->insertObjRef(SkPDFResourceDict::getResourceName(type, i),
67 SkRef(resourceList[i]));
68 }
69 dst->insertObject(get_resource_type_name(type), resources.detach());
70 }
71
Create(const SkTDArray<SkPDFObject * > * gStateResources,const SkTDArray<SkPDFObject * > * patternResources,const SkTDArray<SkPDFObject * > * xObjectResources,const SkTDArray<SkPDFObject * > * fontResources)72 SkPDFDict* SkPDFResourceDict::Create(
73 const SkTDArray<SkPDFObject*>* gStateResources,
74 const SkTDArray<SkPDFObject*>* patternResources,
75 const SkTDArray<SkPDFObject*>* xObjectResources,
76 const SkTDArray<SkPDFObject*>* fontResources) {
77 SkAutoTUnref<SkPDFDict> dict(new SkPDFDict);
78 static const char kProcs[][7] = {
79 "PDF", "Text", "ImageB", "ImageC", "ImageI"};
80 SkAutoTUnref<SkPDFArray> procSets(new SkPDFArray);
81
82 procSets->reserve(SK_ARRAY_COUNT(kProcs));
83 for (size_t i = 0; i < SK_ARRAY_COUNT(kProcs); i++) {
84 procSets->appendName(kProcs[i]);
85 }
86 dict->insertObject("ProcSets", procSets.detach());
87
88 if (gStateResources) {
89 add_subdict(*gStateResources, kExtGState_ResourceType, dict);
90 }
91 if (patternResources) {
92 add_subdict(*patternResources, kPattern_ResourceType, dict);
93 }
94 if (xObjectResources) {
95 add_subdict(*xObjectResources, kXObject_ResourceType, dict);
96 }
97 if (fontResources) {
98 add_subdict(*fontResources, kFont_ResourceType, dict);
99 }
100 return dict.detach();
101 }
102