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
12SkPDFIndirectReference 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