The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/skia/trunk/src/pdf/SkPDFFormXObject.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,95 @@
     1.4 +
     1.5 +/*
     1.6 + * Copyright 2010 The Android Open Source Project
     1.7 + *
     1.8 + * Use of this source code is governed by a BSD-style license that can be
     1.9 + * found in the LICENSE file.
    1.10 + */
    1.11 +
    1.12 +
    1.13 +#include "SkPDFFormXObject.h"
    1.14 +
    1.15 +#include "SkMatrix.h"
    1.16 +#include "SkPDFCatalog.h"
    1.17 +#include "SkPDFDevice.h"
    1.18 +#include "SkPDFResourceDict.h"
    1.19 +#include "SkPDFUtils.h"
    1.20 +#include "SkStream.h"
    1.21 +#include "SkTypes.h"
    1.22 +
    1.23 +SkPDFFormXObject::SkPDFFormXObject(SkPDFDevice* device) {
    1.24 +    // We don't want to keep around device because we'd have two copies
    1.25 +    // of content, so reference or copy everything we need (content and
    1.26 +    // resources).
    1.27 +    SkTSet<SkPDFObject*> emptySet;
    1.28 +    SkPDFResourceDict* resourceDict = device->getResourceDict();
    1.29 +    resourceDict->getReferencedResources(emptySet, &fResources, false);
    1.30 +
    1.31 +    SkAutoTUnref<SkStream> content(device->content());
    1.32 +    setData(content.get());
    1.33 +
    1.34 +    SkAutoTUnref<SkPDFArray> bboxArray(device->copyMediaBox());
    1.35 +    init(NULL, resourceDict, bboxArray);
    1.36 +
    1.37 +    // We invert the initial transform and apply that to the xobject so that
    1.38 +    // it doesn't get applied twice. We can't just undo it because it's
    1.39 +    // embedded in things like shaders and images.
    1.40 +    if (!device->initialTransform().isIdentity()) {
    1.41 +        SkMatrix inverse;
    1.42 +        if (!device->initialTransform().invert(&inverse)) {
    1.43 +            // The initial transform should be invertible.
    1.44 +            SkASSERT(false);
    1.45 +            inverse.reset();
    1.46 +        }
    1.47 +        insert("Matrix", SkPDFUtils::MatrixToArray(inverse))->unref();
    1.48 +    }
    1.49 +}
    1.50 +
    1.51 +/**
    1.52 + * Creates a FormXObject from a content stream and associated resources.
    1.53 + */
    1.54 +SkPDFFormXObject::SkPDFFormXObject(SkStream* content, SkRect bbox,
    1.55 +                                   SkPDFResourceDict* resourceDict) {
    1.56 +    SkTSet<SkPDFObject*> emptySet;
    1.57 +    resourceDict->getReferencedResources(emptySet, &fResources, false);
    1.58 +
    1.59 +    setData(content);
    1.60 +
    1.61 +    SkAutoTUnref<SkPDFArray> bboxArray(SkPDFUtils::RectToArray(bbox));
    1.62 +    init("DeviceRGB", resourceDict, bboxArray);
    1.63 +}
    1.64 +
    1.65 +/**
    1.66 + * Common initialization code.
    1.67 + * Note that bbox is unreferenced here, so calling code does not need worry.
    1.68 + */
    1.69 +void SkPDFFormXObject::init(const char* colorSpace,
    1.70 +                            SkPDFDict* resourceDict, SkPDFArray* bbox) {
    1.71 +    insertName("Type", "XObject");
    1.72 +    insertName("Subtype", "Form");
    1.73 +    insert("Resources", resourceDict);
    1.74 +    insert("BBox", bbox);
    1.75 +
    1.76 +    // Right now SkPDFFormXObject is only used for saveLayer, which implies
    1.77 +    // isolated blending.  Do this conditionally if that changes.
    1.78 +    SkAutoTUnref<SkPDFDict> group(new SkPDFDict("Group"));
    1.79 +    group->insertName("S", "Transparency");
    1.80 +
    1.81 +    if (colorSpace != NULL) {
    1.82 +        group->insertName("CS", colorSpace);
    1.83 +    }
    1.84 +    group->insert("I", new SkPDFBool(true))->unref();  // Isolated.
    1.85 +    insert("Group", group.get());
    1.86 +}
    1.87 +
    1.88 +SkPDFFormXObject::~SkPDFFormXObject() {
    1.89 +    fResources.unrefAll();
    1.90 +}
    1.91 +
    1.92 +void SkPDFFormXObject::getResources(
    1.93 +        const SkTSet<SkPDFObject*>& knownResourceObjects,
    1.94 +        SkTSet<SkPDFObject*>* newResourceObjects) {
    1.95 +    GetResourcesHelper(&fResources.toArray(),
    1.96 +                       knownResourceObjects,
    1.97 +                       newResourceObjects);
    1.98 +}