Line data    Source code

       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 "SkPDFFormXObject.h"
      10             : #include "SkPDFUtils.h"
      11             : 
      12           0 : sk_sp<SkPDFObject> SkPDFMakeFormXObject(std::unique_ptr<SkStreamAsset> content,
      13             :                                         sk_sp<SkPDFArray> mediaBox,
      14             :                                         sk_sp<SkPDFDict> resourceDict,
      15             :                                         const SkMatrix& inverseTransform,
      16             :                                         const char* colorSpace) {
      17           0 :     auto form = sk_make_sp<SkPDFStream>(std::move(content));
      18           0 :     form->dict()->insertName("Type", "XObject");
      19           0 :     form->dict()->insertName("Subtype", "Form");
      20           0 :     if (!inverseTransform.isIdentity()) {
      21           0 :         sk_sp<SkPDFObject> mat(SkPDFUtils::MatrixToArray(inverseTransform));
      22           0 :         form->dict()->insertObject("Matrix", std::move(mat));
      23             :     }
      24           0 :     form->dict()->insertObject("Resources", std::move(resourceDict));
      25           0 :     form->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           0 :     auto group = sk_make_sp<SkPDFDict>("Group");
      32           0 :     group->insertName("S", "Transparency");
      33           0 :     if (colorSpace != nullptr) {
      34           0 :         group->insertName("CS", colorSpace);
      35             :     }
      36           0 :     group->insertBool("I", true);  // Isolated.
      37           0 :     form->dict()->insertObject("Group", std::move(group));
      38           0 :     return form;
      39             : }