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      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