1 files changed, 414 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/utils/SkNWayCanvas.cpp b/gfx/skia/skia/src/utils/SkNWayCanvas.cpp
new file mode 100644
index 0000000000..2b85fc1b54
--- /dev/null
+++ b/gfx/skia/skia/src/utils/SkNWayCanvas.cpp
@@ -0,0 +1,414 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "include/utils/SkNWayCanvas.h"
+
+#include "include/core/SkCanvas.h"
+#include "include/core/SkColor.h"
+#include "include/core/SkMatrix.h"
+#include "include/core/SkPoint.h"
+#include "include/core/SkRect.h"
+#include "include/core/SkRefCnt.h"
+#include "include/core/SkScalar.h"
+#include "include/core/SkShader.h"
+#include "include/core/SkTypes.h"
+#include "include/private/base/SkTDArray.h"
+#include "include/utils/SkNoDrawCanvas.h"
+#include "src/core/SkCanvasPriv.h"
+
+#include <algorithm>
+#include <iterator>
+#include <utility>
+
+namespace sktext {
+class GlyphRunList;
+}
+
+class SkData;
+class SkDrawable;
+class SkImage;
+class SkPaint;
+class SkPath;
+class SkPicture;
+class SkRRect;
+class SkRegion;
+class SkTextBlob;
+class SkVertices;
+enum class SkBlendMode;
+enum class SkClipOp;
+struct SkDrawShadowRec;
+
+SkNWayCanvas::SkNWayCanvas(int width, int height) : INHERITED(width, height) {}
+
+SkNWayCanvas::~SkNWayCanvas() {
+    this->removeAll();
+}
+
+void SkNWayCanvas::addCanvas(SkCanvas* canvas) {
+    if (!fList.empty()) {
+        // We are using the nway canvas as a wrapper for the originally added canvas, and the device
+        // on the nway may contradict calls for the device on this canvas. So, to add a second
+        // canvas, the devices on the first canvas, and the nway base device must be different.
+        SkASSERT(fList[0]->baseDevice() != this->baseDevice());
+    }
+    if (canvas) {
+        *fList.append() = canvas;
+    }
+}
+
+void SkNWayCanvas::removeCanvas(SkCanvas* canvas) {
+    auto found = std::find(fList.begin(), fList.end(), canvas);
+    if (found != fList.end()) {
+        fList.removeShuffle(std::distance(fList.begin(), found));
+    }
+}
+
+void SkNWayCanvas::removeAll() {
+    fList.reset();
+}
+
+///////////////////////////////////////////////////////////////////////////
+// These are forwarded to the N canvases we're referencing
+
+class SkNWayCanvas::Iter {
+public:
+    Iter(const SkTDArray<SkCanvas*>& list) : fList(list) {
+        fIndex = 0;
+    }
+    bool next() {
+        if (fIndex < fList.size()) {
+            fCanvas = fList[fIndex++];
+            return true;
+        }
+        return false;
+    }
+    SkCanvas* operator->() { return fCanvas; }
+    SkCanvas* get() const { return fCanvas; }
+
+private:
+    const SkTDArray<SkCanvas*>& fList;
+    int fIndex;
+    SkCanvas* fCanvas;
+};
+
+void SkNWayCanvas::willSave() {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->save();
+    }
+
+    this->INHERITED::willSave();
+}
+
+SkCanvas::SaveLayerStrategy SkNWayCanvas::getSaveLayerStrategy(const SaveLayerRec& rec) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->saveLayer(rec);
+    }
+
+    this->INHERITED::getSaveLayerStrategy(rec);
+    // No need for a layer.
+    return kNoLayer_SaveLayerStrategy;
+}
+
+bool SkNWayCanvas::onDoSaveBehind(const SkRect* bounds) {
+    Iter iter(fList);
+    while (iter.next()) {
+        SkCanvasPriv::SaveBehind(iter.get(), bounds);
+    }
+    this->INHERITED::onDoSaveBehind(bounds);
+    return false;
+}
+
+void SkNWayCanvas::willRestore() {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->restore();
+    }
+    this->INHERITED::willRestore();
+}
+
+void SkNWayCanvas::didConcat44(const SkM44& m) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->concat(m);
+    }
+}
+
+void SkNWayCanvas::didSetM44(const SkM44& matrix) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->setMatrix(matrix);
+    }
+}
+
+void SkNWayCanvas::didTranslate(SkScalar x, SkScalar y) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->translate(x, y);
+    }
+}
+
+void SkNWayCanvas::didScale(SkScalar x, SkScalar y) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->scale(x, y);
+    }
+}
+
+void SkNWayCanvas::onClipRect(const SkRect& rect, SkClipOp op, ClipEdgeStyle edgeStyle) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->clipRect(rect, op, kSoft_ClipEdgeStyle == edgeStyle);
+    }
+    this->INHERITED::onClipRect(rect, op, edgeStyle);
+}
+
+void SkNWayCanvas::onClipRRect(const SkRRect& rrect, SkClipOp op, ClipEdgeStyle edgeStyle) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->clipRRect(rrect, op, kSoft_ClipEdgeStyle == edgeStyle);
+    }
+    this->INHERITED::onClipRRect(rrect, op, edgeStyle);
+}
+
+void SkNWayCanvas::onClipPath(const SkPath& path, SkClipOp op, ClipEdgeStyle edgeStyle) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->clipPath(path, op, kSoft_ClipEdgeStyle == edgeStyle);
+    }
+    this->INHERITED::onClipPath(path, op, edgeStyle);
+}
+
+void SkNWayCanvas::onClipShader(sk_sp<SkShader> sh, SkClipOp op) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->clipShader(sh, op);
+    }
+    this->INHERITED::onClipShader(std::move(sh), op);
+}
+
+void SkNWayCanvas::onClipRegion(const SkRegion& deviceRgn, SkClipOp op) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->clipRegion(deviceRgn, op);
+    }
+    this->INHERITED::onClipRegion(deviceRgn, op);
+}
+
+void SkNWayCanvas::onResetClip() {
+    Iter iter(fList);
+    while (iter.next()) {
+        SkCanvasPriv::ResetClip(iter.get());
+    }
+    this->INHERITED::onResetClip();
+}
+
+void SkNWayCanvas::onDrawPaint(const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawPaint(paint);
+    }
+}
+
+void SkNWayCanvas::onDrawBehind(const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        SkCanvasPriv::DrawBehind(iter.get(), paint);
+    }
+}
+
+void SkNWayCanvas::onDrawPoints(PointMode mode, size_t count, const SkPoint pts[],
+                                const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawPoints(mode, count, pts, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawRect(const SkRect& rect, const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawRect(rect, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawRegion(const SkRegion& region, const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawRegion(region, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawOval(const SkRect& rect, const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawOval(rect, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawArc(const SkRect& rect, SkScalar startAngle, SkScalar sweepAngle,
+                             bool useCenter, const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawArc(rect, startAngle, sweepAngle, useCenter, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawRRect(const SkRRect& rrect, const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawRRect(rrect, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawDRRect(outer, inner, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawPath(path, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawImage2(const SkImage* image, SkScalar left, SkScalar top,
+                                const SkSamplingOptions& sampling, const SkPaint* paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawImage(image, left, top, sampling, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawImageRect2(const SkImage* image, const SkRect& src, const SkRect& dst,
+                                    const SkSamplingOptions& sampling, const SkPaint* paint,
+                                    SrcRectConstraint constraint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawImageRect(image, src, dst, sampling, paint, constraint);
+    }
+}
+
+void SkNWayCanvas::onDrawImageLattice2(const SkImage* image, const Lattice& lattice,
+                                       const SkRect& dst, SkFilterMode filter,
+                                       const SkPaint* paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawImageLattice(image, lattice, dst, filter, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawAtlas2(const SkImage* image, const SkRSXform xform[], const SkRect tex[],
+                                const SkColor colors[], int count, SkBlendMode bmode,
+                                const SkSamplingOptions& sampling, const SkRect* cull,
+                                const SkPaint* paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawAtlas(image, xform, tex, colors, count, bmode, sampling, cull, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawGlyphRunList(const sktext::GlyphRunList& list,
+                                      const SkPaint &paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->onDrawGlyphRunList(list, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
+                                  const SkPaint &paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawTextBlob(blob, x, y, paint);
+    }
+}
+
+#if defined(SK_GANESH)
+void SkNWayCanvas::onDrawSlug(const sktext::gpu::Slug* slug) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawSlug(slug);
+    }
+}
+#endif
+
+void SkNWayCanvas::onDrawPicture(const SkPicture* picture, const SkMatrix* matrix,
+                                 const SkPaint* paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawPicture(picture, matrix, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawDrawable(drawable, matrix);
+    }
+}
+
+void SkNWayCanvas::onDrawVerticesObject(const SkVertices* vertices,
+                                        SkBlendMode bmode, const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawVertices(vertices, bmode, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
+                               const SkPoint texCoords[4], SkBlendMode bmode,
+                               const SkPaint& paint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawPatch(cubics, colors, texCoords, bmode, paint);
+    }
+}
+
+void SkNWayCanvas::onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->private_draw_shadow_rec(path, rec);
+    }
+}
+
+void SkNWayCanvas::onDrawAnnotation(const SkRect& rect, const char key[], SkData* data) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->drawAnnotation(rect, key, data);
+    }
+}
+
+void SkNWayCanvas::onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4],
+                                    QuadAAFlags aa, const SkColor4f& color, SkBlendMode mode) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->experimental_DrawEdgeAAQuad(rect, clip, aa, color, mode);
+    }
+}
+
+void SkNWayCanvas::onDrawEdgeAAImageSet2(const ImageSetEntry set[], int count,
+                                         const SkPoint dstClips[], const SkMatrix preViewMatrices[],
+                                         const SkSamplingOptions& sampling, const SkPaint* paint,
+                                         SrcRectConstraint constraint) {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->experimental_DrawEdgeAAImageSet(
+                set, count, dstClips, preViewMatrices, sampling, paint, constraint);
+    }
+}
+
+void SkNWayCanvas::onFlush() {
+    Iter iter(fList);
+    while (iter.next()) {
+        iter->flush();
+    }
+}