1 /*
2  * Copyright 2015 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 #ifndef SkPDFCanon_DEFINED
8 #define SkPDFCanon_DEFINED
9 
10 #include "SkBitmapKey.h"
11 #include "SkPDFGradientShader.h"
12 #include "SkPDFGraphicState.h"
13 #include "SkPDFShader.h"
14 #include "SkTDArray.h"
15 #include "SkTHash.h"
16 #include "SkTypeface.h"
17 
18 class SkPDFFont;
19 struct SkAdvancedTypefaceMetrics;
20 
21 /**
22  *  The SkPDFCanon canonicalizes objects across PDF pages
23  *  (SkPDFDevices) and across draw calls.
24  */
25 class SkPDFCanon {
26 public:
27     ~SkPDFCanon();
28     SkPDFCanon();
29     SkPDFCanon(const SkPDFCanon&) = delete;
30     SkPDFCanon& operator=(const SkPDFCanon&) = delete;
31 
32     SkTHashMap<SkPDFImageShaderKey, sk_sp<SkPDFObject>> fImageShaderMap;
33 
34     SkPDFGradientShader::HashMap fGradientPatternMap;
35 
36     SkTHashMap<SkBitmapKey, sk_sp<SkPDFObject>> fPDFBitmapMap;
37 
38     SkTHashMap<uint32_t, std::unique_ptr<SkAdvancedTypefaceMetrics>> fTypefaceMetrics;
39     SkTHashMap<uint32_t, sk_sp<SkPDFDict>> fFontDescriptors;
40     SkTHashMap<uint64_t, sk_sp<SkPDFFont>> fFontMap;
41 
42     SkTHashMap<SkPDFStrokeGraphicState, sk_sp<SkPDFDict>> fStrokeGSMap;
43     SkTHashMap<SkPDFFillGraphicState, sk_sp<SkPDFDict>> fFillGSMap;
44 
45     sk_sp<SkPDFStream> fInvertFunction;
46     sk_sp<SkPDFDict> fNoSmaskGraphicState;
47     sk_sp<SkPDFArray> fRangeObject;
48 
49     SK_BEGIN_REQUIRE_DENSE
50     struct BitmapGlyphKey {
51         SkFontID fFontID;      // uint32_t
52         SkScalar fTextSize;    // float32
53         SkScalar fTextScaleX;  // float32
54         SkScalar fTextSkewX;   // float32
55         SkGlyphID fGlyphID;    // uint16_t
56         uint16_t fPadding;
57     };
58     SK_END_REQUIRE_DENSE
59     struct BitmapGlyph {
60         sk_sp<SkImage> fImage;
61         SkIPoint fOffset;
62     };
63     SkTHashMap<BitmapGlyphKey, BitmapGlyph> fBitmapGlyphImages;
64 };
65 
66 inline bool operator==(const SkPDFCanon::BitmapGlyphKey& u, const SkPDFCanon::BitmapGlyphKey& v) {
67     return memcmp(&u, &v, sizeof(SkPDFCanon::BitmapGlyphKey)) == 0;
68 }
69 #endif  // SkPDFCanon_DEFINED
70