1 /*
2 * Copyright 2010 The Android Open Source Project
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 "src/pdf/SkPDFFormXObject.h"
9
10 #include "include/core/SkMatrix.h"
11 #include "include/core/SkStream.h"
12 #include "src/pdf/SkPDFUtils.h"
13
14 #include <utility>
15
SkPDFMakeFormXObject(SkPDFDocument * doc,std::unique_ptr<SkStreamAsset> content,std::unique_ptr<SkPDFArray> mediaBox,std::unique_ptr<SkPDFDict> resourceDict,const SkMatrix & inverseTransform,const char * colorSpace)16 SkPDFIndirectReference SkPDFMakeFormXObject(SkPDFDocument* doc,
17 std::unique_ptr<SkStreamAsset> content,
18 std::unique_ptr<SkPDFArray> mediaBox,
19 std::unique_ptr<SkPDFDict> resourceDict,
20 const SkMatrix& inverseTransform,
21 const char* colorSpace) {
22 std::unique_ptr<SkPDFDict> dict = SkPDFMakeDict();
23 dict->insertName("Type", "XObject");
24 dict->insertName("Subtype", "Form");
25 if (!inverseTransform.isIdentity()) {
26 dict->insertObject("Matrix", SkPDFUtils::MatrixToArray(inverseTransform));
27 }
28 dict->insertObject("Resources", std::move(resourceDict));
29 dict->insertObject("BBox", std::move(mediaBox));
30
31 // Right now FormXObject is only used for saveLayer, which implies
32 // isolated blending. Do this conditionally if that changes.
33 // TODO(halcanary): Is this comment obsolete, since we use it for
34 // alpha masks?
35 auto group = SkPDFMakeDict("Group");
36 group->insertName("S", "Transparency");
37 if (colorSpace != nullptr) {
38 group->insertName("CS", colorSpace);
39 }
40 group->insertBool("I", true); // Isolated.
41 dict->insertObject("Group", std::move(group));
42 return SkPDFStreamOut(std::move(dict), std::move(content), doc);
43 }
44