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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 "SkPixelSerializer.h"
     15 #include "SkTDArray.h"
     16 #include "SkTHash.h"
     17 #include "SkTypeface.h"
     18 
     19 class SkPDFFont;
     20 struct SkAdvancedTypefaceMetrics;
     21 
     22 /**
     23  *  The SkPDFCanon canonicalizes objects across PDF pages
     24  *  (SkPDFDevices) and across draw calls.
     25  */
     26 class SkPDFCanon {
     27 public:
     28     ~SkPDFCanon();
     29     SkPDFCanon();
     30     SkPDFCanon(const SkPDFCanon&) = delete;
     31     SkPDFCanon& operator=(const SkPDFCanon&) = delete;
     32 
     33     SkTHashMap<SkPDFImageShaderKey, sk_sp<SkPDFObject>> fImageShaderMap;
     34 
     35     SkPDFGradientShader::HashMap fGradientPatternMap;
     36 
     37     SkTHashMap<SkBitmapKey, sk_sp<SkPDFObject>> fPDFBitmapMap;
     38 
     39     SkTHashMap<uint32_t, std::unique_ptr<SkAdvancedTypefaceMetrics>> fTypefaceMetrics;
     40     SkTHashMap<uint32_t, sk_sp<SkPDFDict>> fFontDescriptors;
     41     SkTHashMap<uint64_t, sk_sp<SkPDFFont>> fFontMap;
     42 
     43     SkTHashMap<SkPDFStrokeGraphicState, sk_sp<SkPDFDict>> fStrokeGSMap;
     44     SkTHashMap<SkPDFFillGraphicState, sk_sp<SkPDFDict>> fFillGSMap;
     45 
     46     sk_sp<SkPixelSerializer> fPixelSerializer;
     47     sk_sp<SkPDFStream> fInvertFunction;
     48     sk_sp<SkPDFDict> fNoSmaskGraphicState;
     49     sk_sp<SkPDFArray> fRangeObject;
     50 
     51     SK_BEGIN_REQUIRE_DENSE
     52     struct BitmapGlyphKey {
     53         SkFontID fFontID;      // uint32_t
     54         SkScalar fTextSize;    // float32
     55         SkScalar fTextScaleX;  // float32
     56         SkScalar fTextSkewX;   // float32
     57         SkGlyphID fGlyphID;    // uint16_t
     58         uint16_t fPadding;
     59     };
     60     SK_END_REQUIRE_DENSE
     61     struct BitmapGlyph {
     62         sk_sp<SkImage> fImage;
     63         SkIPoint fOffset;
     64     };
     65     SkTHashMap<BitmapGlyphKey, BitmapGlyph> fBitmapGlyphImages;
     66 };
     67 
     68 inline bool operator==(const SkPDFCanon::BitmapGlyphKey& u, const SkPDFCanon::BitmapGlyphKey& v) {
     69     return memcmp(&u, &u, sizeof(SkPDFCanon::BitmapGlyphKey)) == 0;
     70 }
     71 #endif  // SkPDFCanon_DEFINED
     72