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 "SkPdfContext.h"
9 #include "SkPdfNativeDoc.h"
10 #include "SkPdfReporter.h"
11 #include "SkPdfTokenLooper.h"
12
13 ///////////////////////////////////////////////////////////////////////////////
14
15 class PdfMainLooper : public SkPdfTokenLooper {
16 public:
PdfMainLooper(SkPdfNativeTokenizer * tokenizer,SkPdfContext * pdfContext,SkCanvas * canvas)17 PdfMainLooper(SkPdfNativeTokenizer* tokenizer,
18 SkPdfContext* pdfContext,
19 SkCanvas* canvas)
20 : INHERITED(tokenizer, pdfContext, canvas) {}
21
22 virtual SkPdfResult consumeToken(PdfToken& token) SK_OVERRIDE;
23 virtual void loop() SK_OVERRIDE;
24
25 private:
26 typedef SkPdfTokenLooper INHERITED;
27 };
28
29 ///////////////////////////////////////////////////////////////////////////////
30
SkPdfContext(SkPdfNativeDoc * doc)31 SkPdfContext::SkPdfContext(SkPdfNativeDoc* doc)
32 : fPdfDoc(doc)
33 {
34 SkASSERT(fPdfDoc != NULL);
35 }
36
parseStream(SkPdfNativeObject * stream,SkCanvas * canvas)37 void SkPdfContext::parseStream(SkPdfNativeObject* stream, SkCanvas* canvas) {
38 if (NULL == stream) {
39 // Nothing to parse.
40 return;
41 }
42
43 SkPdfNativeTokenizer tokenizer(stream, &fTmpPageAllocator, fPdfDoc);
44 PdfMainLooper looper(&tokenizer, this, canvas);
45 looper.loop();
46 }
47
48 ///////////////////////////////////////////////////////////////////////////////
49
50 // FIXME (scroggo): This probably belongs in a debugging file.
51 // For reportRenderStats declaration.
52 #include "SkPdfRenderer.h"
53
54 // Temp code to measure what operands fail.
55 template <typename T> class SkTDictWithDefaultConstructor : public SkTDict<T> {
56 public:
SkTDictWithDefaultConstructor()57 SkTDictWithDefaultConstructor() : SkTDict<T>(10) {}
58 };
59
60 SkTDictWithDefaultConstructor<int> gRenderStats[kCount_SkPdfResult];
61
62 const char* gRenderStatsNames[kCount_SkPdfResult] = {
63 "Success",
64 "Partially implemented",
65 "Not yet implemented",
66 "Ignore Error",
67 "Error",
68 "Unsupported/Unknown"
69 };
70
71 // Declared in SkPdfRenderer.h. Should be moved to a central debugging location.
reportPdfRenderStats()72 void reportPdfRenderStats() {
73 for (int i = 0 ; i < kCount_SkPdfResult; i++) {
74 SkTDict<int>::Iter iter(gRenderStats[i]);
75 const char* key;
76 int value = 0;
77 while ((key = iter.next(&value)) != NULL) {
78 SkDebugf("%s: %s -> count %i\n", gRenderStatsNames[i], key, value);
79 }
80 }
81 }
82
83 #include "SkPdfOps.h"
84
consumeToken(PdfToken & token)85 SkPdfResult PdfMainLooper::consumeToken(PdfToken& token) {
86 if (token.fType == kKeyword_TokenType && token.fKeywordLength < 256)
87 {
88 PdfOperatorRenderer pdfOperatorRenderer = NULL;
89 if (gPdfOps.find(token.fKeyword, token.fKeywordLength, &pdfOperatorRenderer) &&
90 pdfOperatorRenderer) {
91 // Main work is done by pdfOperatorRenderer(...)
92 SkPdfResult result = pdfOperatorRenderer(fPdfContext, fCanvas, this);
93
94 int cnt = 0;
95 gRenderStats[result].find(token.fKeyword, token.fKeywordLength, &cnt);
96 gRenderStats[result].set(token.fKeyword, token.fKeywordLength, cnt + 1);
97 } else {
98 int cnt = 0;
99 gRenderStats[kUnsupported_SkPdfResult].find(token.fKeyword,
100 token.fKeywordLength,
101 &cnt);
102 gRenderStats[kUnsupported_SkPdfResult].set(token.fKeyword,
103 token.fKeywordLength,
104 cnt + 1);
105 }
106 }
107 else if (token.fType == kObject_TokenType)
108 {
109 fPdfContext->fObjectStack.push( token.fObject );
110 }
111 else {
112 // TODO(edisonn): store the keyword as a object, so we can track the location in file,
113 // and report where the error was triggered
114 SkPdfReport(kCodeWarning_SkPdfIssueSeverity, kNYI_SkPdfIssue, token.fKeyword, NULL,
115 fPdfContext);
116 return kIgnoreError_SkPdfResult;
117 }
118 return kOK_SkPdfResult;
119 }
120
loop()121 void PdfMainLooper::loop() {
122 PdfToken token;
123 while (fTokenizer->readToken(&token, true)) {
124 this->consumeToken(token);
125 }
126 }
127