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 #ifndef SkPdfUtils_DEFINED
9 #define SkPdfUtils_DEFINED
10
11 #include "SkMatrix.h"
12 #include "SkRect.h"
13 #include "SkPdfConfig.h"
14 #include "SkString.h"
15
16 class SkPdfArray;
17 class SkPdfContext;
18 class SkCanvas;
19 class SkPdfNativeObject;
20
21 // TODO(edisonn): temporary code, to report how much of the PDF we actually think we rendered.
22 enum SkPdfResult {
23 kOK_SkPdfResult,
24 kPartial_SkPdfResult,
25 kNYI_SkPdfResult,
26 kIgnoreError_SkPdfResult,
27 kError_SkPdfResult,
28 kUnsupported_SkPdfResult,
29
30 kCount_SkPdfResult
31 };
32
33 // In order to operate fast, when we parse the pdf, we try not to allocate many new strings,
34 // and if possible we refer the string in the pdf stream.
35 struct NotOwnedString {
36 const unsigned char* fBuffer;
37 // TODO(edisonn): clean up, the last two bytes are used to signal if compression is used
38 size_t fBytes;
39
initNotOwnedString40 static void init(NotOwnedString* str) {
41 str->fBuffer = NULL;
42 str->fBytes = 0;
43 }
44
initNotOwnedString45 static void init(NotOwnedString* str, const char* sz) {
46 str->fBuffer = (const unsigned char*)sz;
47 str->fBytes = strlen(sz);
48 }
49
equalsNotOwnedString50 bool equals(const char* sz) {
51 return strncmp((const char*)fBuffer, sz, fBytes) == 0 && fBytes == strlen(sz);
52
53 }
54 };
55
56 SkMatrix SkMatrixFromPdfMatrix(double array[6]);
57
58 // TODO(edisonn): hack to make code generation simpler. Alternatively we can update the
59 // generate_code.py not to rely on != operator
60 bool operator !=(const SkString& first, const char* second);
61
62 SkMatrix SkMatrixFromPdfArray(SkPdfArray* pdfArray);
63
64 SkPdfResult doType3Char(SkPdfContext* pdfContext, SkCanvas* canvas, const SkPdfNativeObject* skobj,
65 SkRect bBox, SkMatrix matrix, double textSize);
66
67 ////////////////////////////////////////////////////////////////////////////////////////////////////
68 //
69 // TRACE functions
70 //
71 #ifdef PDF_TRACE
72 void SkTraceMatrix(const SkMatrix& matrix, const char* sz);
73 void SkTraceRect(const SkRect& rect, const char* sz);
74 #else
75 #define SkTraceMatrix(a,b)
76 #define SkTraceRect(a,b)
77 #endif
78
79 #ifdef PDF_TRACE_TOKENIZER
80
TRACE_COMMENT(char ch)81 static void TRACE_COMMENT(char ch) {
82 printf("%c", ch);
83 }
84
TRACE_TK(char ch)85 static void TRACE_TK(char ch) {
86 printf("%c", ch);
87 }
88
TRACE_NAME(const unsigned char * start,const unsigned char * end)89 static void TRACE_NAME(const unsigned char* start, const unsigned char* end) {
90 while (start < end) {
91 printf("%c", *start);
92 start++;
93 }
94 printf("\n");
95 }
96
TRACE_STRING(const unsigned char * start,const unsigned char * end)97 static void TRACE_STRING(const unsigned char* start, const unsigned char* end) {
98 while (start < end) {
99 printf("%c", *start);
100 start++;
101 }
102 printf("\n");
103 }
104
TRACE_HEXSTRING(const unsigned char * start,const unsigned char * end)105 static void TRACE_HEXSTRING(const unsigned char* start, const unsigned char* end) {
106 while (start < end) {
107 printf("%c", *start);
108 start++;
109 }
110 printf("\n");
111 }
112
113 #else
114 #define TRACE_COMMENT(ch)
115 #define TRACE_TK(ch)
116 #define TRACE_NAME(start,end)
117 #define TRACE_STRING(start,end)
118 #define TRACE_HEXSTRING(start,end)
119 #endif
120
121 #endif // SkPdfUtils_DEFINED
122