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