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| 1 /* | |
| 2 * Copyright 2013 Google Inc. | |
| 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 #include "SkPdfNativeObject.h" | |
| 9 | |
| 10 #include "SkBitmap.h" | |
| 11 #include "SkFlate.h" | |
| 12 #include "SkPdfFont.h" | |
| 13 #include "SkPdfNativeTokenizer.h" | |
| 14 #include "SkPdfReporter.h" | |
| 15 #include "SkStream.h" | |
| 16 | |
| 17 // TODO(edisonn): mac builder does not find the header ... but from headers is o
k | |
| 18 //#include "SkPdfStreamCommonDictionary_autogen.h" | |
| 19 #include "SkPdfHeaders_autogen.h" | |
| 20 | |
| 21 | |
| 22 SkPdfNativeObject SkPdfNativeObject::kNull = SkPdfNativeObject::makeNull(); | |
| 23 | |
| 24 bool SkPdfNativeObject::applyFlateDecodeFilter() { | |
| 25 const unsigned char* old = fStr.fBuffer; | |
| 26 bool deleteOld = isStreamOwned(); | |
| 27 | |
| 28 SkMemoryStream skstream(fStr.fBuffer, fStr.fBytes >> 2, false); | |
| 29 SkDynamicMemoryWStream uncompressedData; | |
| 30 | |
| 31 if (SkFlate::Inflate(&skstream, &uncompressedData)) { | |
| 32 fStr.fBytes = (uncompressedData.bytesWritten() << 2) + kOwnedStreamBit + | |
| 33 kUnfilteredStreamBit; | |
| 34 fStr.fBuffer = (const unsigned char*)new unsigned char[uncompressedData.
bytesWritten()]; | |
| 35 uncompressedData.copyTo((void*)fStr.fBuffer); | |
| 36 | |
| 37 if (deleteOld) { | |
| 38 delete[] old; | |
| 39 } | |
| 40 | |
| 41 return true; | |
| 42 } else { | |
| 43 SkPdfReport(kIgnoreError_SkPdfIssueSeverity, kBadStream_SkPdfIssue, "inf
late failed", this, NULL); | |
| 44 return false; | |
| 45 } | |
| 46 } | |
| 47 | |
| 48 bool SkPdfNativeObject::applyDCTDecodeFilter() { | |
| 49 // applyDCTDecodeFilter will fail, and it won't allow any more filters. | |
| 50 // technically, it would be possible, but not a real world scenario. | |
| 51 // in this way we create the image from the DCT stream directly. | |
| 52 return false; | |
| 53 } | |
| 54 | |
| 55 bool SkPdfNativeObject::applyFilter(const char* name) { | |
| 56 if (strcmp(name, "FlateDecode") == 0) { | |
| 57 return applyFlateDecodeFilter(); | |
| 58 } else if (strcmp(name, "DCTDecode") == 0) { | |
| 59 return applyDCTDecodeFilter(); | |
| 60 } | |
| 61 SkPdfReport(kCodeWarning_SkPdfIssueSeverity, kNYI_SkPdfIssue, "filter not su
pported", this, | |
| 62 NULL); | |
| 63 return false; | |
| 64 } | |
| 65 | |
| 66 bool SkPdfNativeObject::filterStream() { | |
| 67 SkPdfMarkObjectUsed(); | |
| 68 | |
| 69 if (!hasStream()) { | |
| 70 SkPdfReport(kIgnoreError_SkPdfIssueSeverity, kBadStream_SkPdfIssue, "No
Stream", this, | |
| 71 NULL); | |
| 72 return false; | |
| 73 } | |
| 74 | |
| 75 if (isStreamFiltered()) { | |
| 76 return true; | |
| 77 } | |
| 78 | |
| 79 SkPdfStreamCommonDictionary* stream = (SkPdfStreamCommonDictionary*)this; | |
| 80 | |
| 81 if (!stream->has_Filter()) { | |
| 82 fStr.fBytes = ((fStr.fBytes >> 1) << 1) + kFilteredStreamBit; | |
| 83 } else if (stream->isFilterAName(NULL)) { | |
| 84 SkString filterName = stream->getFilterAsName(NULL); | |
| 85 applyFilter(filterName.c_str()); | |
| 86 } else if (stream->isFilterAArray(NULL)) { | |
| 87 const SkPdfArray* filters = stream->getFilterAsArray(NULL); | |
| 88 int cnt = (int) filters->size(); | |
| 89 for (int i = cnt - 1; i >= 0; i--) { | |
| 90 const SkPdfNativeObject* filterName = filters->objAtAIndex(i); | |
| 91 if (filterName != NULL && filterName->isName()) { | |
| 92 if (!applyFilter(filterName->nameValue())) { | |
| 93 break; | |
| 94 } | |
| 95 } else { | |
| 96 SkPdfReport(kIgnoreError_SkPdfIssueSeverity, kIncositentSyntax_S
kPdfIssue, | |
| 97 "filter name should be a Name", this, NULL); | |
| 98 } | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 return true; | |
| 103 } | |
| 104 | |
| 105 void SkPdfNativeObject::releaseData() { | |
| 106 #ifdef PDF_TRACK_OBJECT_USAGE | |
| 107 SkPdfReportIf(!fUsed, kInfo_SkPdfIssueSeverity, kUnusedObject_SkPdfIssue, | |
| 108 "Unused object in rendering", this, NULL); | |
| 109 #endif // PDF_TRACK_OBJECT_USAGE | |
| 110 | |
| 111 SkPdfMarkObjectUnused(); | |
| 112 | |
| 113 if (fData) { | |
| 114 switch (fDataType) { | |
| 115 case kFont_Data: | |
| 116 delete (SkPdfFont*)fData; | |
| 117 break; | |
| 118 case kBitmap_Data: | |
| 119 delete (SkBitmap*)fData; | |
| 120 break; | |
| 121 default: | |
| 122 SkASSERT(false); | |
| 123 break; | |
| 124 } | |
| 125 } | |
| 126 fData = NULL; | |
| 127 fDataType = kEmpty_Data; | |
| 128 } | |
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Chromium Code Reviews
Issue 1266093003:
Remove experimental/PdfViewer (Closed)
Base URL: https://skia.googlesource.com/skia.git@master