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1 // Copyright 2019 Google LLC.
2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3 #ifndef SkPDFGraphicStackState_DEFINED
4 #define SkPDFGraphicStackState_DEFINED
5 
6 #include "include/core/SkColor.h"
7 #include "include/core/SkMatrix.h"
8 #include "include/core/SkScalar.h"
9 #include "src/core/SkClipStack.h"
10 
11 class SkDynamicMemoryWStream;
12 
13 // It is important to not confuse SkPDFGraphicStackState with SkPDFGraphicState, the
14 // later being our representation of an object in the PDF file.
15 struct SkPDFGraphicStackState {
16     struct Entry {
17         SkMatrix fMatrix = SkMatrix::I();
18         uint32_t fClipStackGenID = SkClipStack::kWideOpenGenID;
19         SkColor4f fColor = {0, 0, 0, 1};
20         SkScalar fTextScaleX = 1;  // Zero means we don't care what the value is.
21         int fShaderIndex = -1;
22         int fGraphicStateIndex = -1;
23     };
24     // Must use stack for matrix, and for clip, plus one for no matrix or clip.
25     static constexpr int kMaxStackDepth = 2;
26     Entry fEntries[kMaxStackDepth + 1];
27     int fStackDepth = 0;
28     SkDynamicMemoryWStream* fContentStream;
29 
fContentStreamSkPDFGraphicStackState30     SkPDFGraphicStackState(SkDynamicMemoryWStream* s = nullptr) : fContentStream(s) {}
31     void updateClip(const SkClipStack* clipStack, const SkIRect& bounds);
32     void updateMatrix(const SkMatrix& matrix);
33     void updateDrawingState(const Entry& state);
34     void push();
35     void pop();
36     void drainStack();
currentEntrySkPDFGraphicStackState37     Entry* currentEntry() { return &fEntries[fStackDepth]; }
38 };
39 
40 #endif  // SkPDFGraphicStackState_DEFINED
41