1 files changed, 41 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/pdf/SkPDFGraphicStackState.h b/gfx/skia/skia/src/pdf/SkPDFGraphicStackState.h
new file mode 100644
index 0000000000..2ea890c1b0
--- /dev/null
+++ b/gfx/skia/skia/src/pdf/SkPDFGraphicStackState.h
@@ -0,0 +1,41 @@
+// Copyright 2019 Google LLC.
+// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
+#ifndef SkPDFGraphicStackState_DEFINED
+#define SkPDFGraphicStackState_DEFINED
+
+#include "include/core/SkColor.h"
+#include "include/core/SkMatrix.h"
+#include "include/core/SkScalar.h"
+#include "include/private/base/SkFloatingPoint.h"
+#include "src/core/SkClipStack.h"
+
+class SkDynamicMemoryWStream;
+
+// It is important to not confuse SkPDFGraphicStackState with SkPDFGraphicState, the
+// later being our representation of an object in the PDF file.
+struct SkPDFGraphicStackState {
+    struct Entry {
+        SkMatrix fMatrix = SkMatrix::I();
+        uint32_t fClipStackGenID = SkClipStack::kWideOpenGenID;
+        SkColor4f fColor = {SK_FloatNaN, SK_FloatNaN, SK_FloatNaN, SK_FloatNaN};
+        SkScalar fTextScaleX = 1;  // Zero means we don't care what the value is.
+        int fShaderIndex = -1;
+        int fGraphicStateIndex = -1;
+    };
+    // Must use stack for matrix, and for clip, plus one for no matrix or clip.
+    inline static constexpr int kMaxStackDepth = 2;
+    Entry fEntries[kMaxStackDepth + 1];
+    int fStackDepth = 0;
+    SkDynamicMemoryWStream* fContentStream;
+
+    SkPDFGraphicStackState(SkDynamicMemoryWStream* s = nullptr) : fContentStream(s) {}
+    void updateClip(const SkClipStack* clipStack, const SkIRect& bounds);
+    void updateMatrix(const SkMatrix& matrix);
+    void updateDrawingState(const Entry& state);
+    void push();
+    void pop();
+    void drainStack();
+    Entry* currentEntry() { return &fEntries[fStackDepth]; }
+};
+
+#endif  // SkPDFGraphicStackState_DEFINED