michael@0: 
michael@0: /*
michael@0:  * Copyright 2010 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "SkPDFFormXObject.h"
michael@0: 
michael@0: #include "SkMatrix.h"
michael@0: #include "SkPDFCatalog.h"
michael@0: #include "SkPDFDevice.h"
michael@0: #include "SkPDFResourceDict.h"
michael@0: #include "SkPDFUtils.h"
michael@0: #include "SkStream.h"
michael@0: #include "SkTypes.h"
michael@0: 
michael@0: SkPDFFormXObject::SkPDFFormXObject(SkPDFDevice* device) {
michael@0:     // We don't want to keep around device because we'd have two copies
michael@0:     // of content, so reference or copy everything we need (content and
michael@0:     // resources).
michael@0:     SkTSet<SkPDFObject*> emptySet;
michael@0:     SkPDFResourceDict* resourceDict = device->getResourceDict();
michael@0:     resourceDict->getReferencedResources(emptySet, &fResources, false);
michael@0: 
michael@0:     SkAutoTUnref<SkStream> content(device->content());
michael@0:     setData(content.get());
michael@0: 
michael@0:     SkAutoTUnref<SkPDFArray> bboxArray(device->copyMediaBox());
michael@0:     init(NULL, resourceDict, bboxArray);
michael@0: 
michael@0:     // We invert the initial transform and apply that to the xobject so that
michael@0:     // it doesn't get applied twice. We can't just undo it because it's
michael@0:     // embedded in things like shaders and images.
michael@0:     if (!device->initialTransform().isIdentity()) {
michael@0:         SkMatrix inverse;
michael@0:         if (!device->initialTransform().invert(&inverse)) {
michael@0:             // The initial transform should be invertible.
michael@0:             SkASSERT(false);
michael@0:             inverse.reset();
michael@0:         }
michael@0:         insert("Matrix", SkPDFUtils::MatrixToArray(inverse))->unref();
michael@0:     }
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Creates a FormXObject from a content stream and associated resources.
michael@0:  */
michael@0: SkPDFFormXObject::SkPDFFormXObject(SkStream* content, SkRect bbox,
michael@0:                                    SkPDFResourceDict* resourceDict) {
michael@0:     SkTSet<SkPDFObject*> emptySet;
michael@0:     resourceDict->getReferencedResources(emptySet, &fResources, false);
michael@0: 
michael@0:     setData(content);
michael@0: 
michael@0:     SkAutoTUnref<SkPDFArray> bboxArray(SkPDFUtils::RectToArray(bbox));
michael@0:     init("DeviceRGB", resourceDict, bboxArray);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Common initialization code.
michael@0:  * Note that bbox is unreferenced here, so calling code does not need worry.
michael@0:  */
michael@0: void SkPDFFormXObject::init(const char* colorSpace,
michael@0:                             SkPDFDict* resourceDict, SkPDFArray* bbox) {
michael@0:     insertName("Type", "XObject");
michael@0:     insertName("Subtype", "Form");
michael@0:     insert("Resources", resourceDict);
michael@0:     insert("BBox", bbox);
michael@0: 
michael@0:     // Right now SkPDFFormXObject is only used for saveLayer, which implies
michael@0:     // isolated blending.  Do this conditionally if that changes.
michael@0:     SkAutoTUnref<SkPDFDict> group(new SkPDFDict("Group"));
michael@0:     group->insertName("S", "Transparency");
michael@0: 
michael@0:     if (colorSpace != NULL) {
michael@0:         group->insertName("CS", colorSpace);
michael@0:     }
michael@0:     group->insert("I", new SkPDFBool(true))->unref();  // Isolated.
michael@0:     insert("Group", group.get());
michael@0: }
michael@0: 
michael@0: SkPDFFormXObject::~SkPDFFormXObject() {
michael@0:     fResources.unrefAll();
michael@0: }
michael@0: 
michael@0: void SkPDFFormXObject::getResources(
michael@0:         const SkTSet<SkPDFObject*>& knownResourceObjects,
michael@0:         SkTSet<SkPDFObject*>* newResourceObjects) {
michael@0:     GetResourcesHelper(&fResources.toArray(),
michael@0:                        knownResourceObjects,
michael@0:                        newResourceObjects);
michael@0: }