Initial support for turning Skia draws into a JSON document and vice versa.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1636563002
Committed: https://skia.googlesource.com/skia/+/3cb582f688822461efa5a034e18008bf2f11e4f8
Review URL: https://codereview.chromium.org/1636563002
diff --git a/tools/json/SkJSONCanvas.cpp b/tools/json/SkJSONCanvas.cpp
new file mode 100644
index 0000000..f60ee27
--- /dev/null
+++ b/tools/json/SkJSONCanvas.cpp
@@ -0,0 +1,428 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkJSONCanvas.h"
+#include "SkPath.h"
+#include "SkRRect.h"
+#include "stdio.h"
+#include "stdlib.h"
+
+SkJSONCanvas::SkJSONCanvas(int width, int height, SkWStream& out)
+ : INHERITED(width, height)
+ , fOut(out)
+ , fFirstCommand(true) {
+ fOut.writeText("{\"" SKJSONCANVAS_VERSION "\":1, \"" SKJSONCANVAS_COMMANDS
+ "\":[");
+}
+
+void SkJSONCanvas::finish() {
+ fOut.writeText("]}");
+}
+
+void SkJSONCanvas::writef(const char* format, ...) {
+ va_list args;
+ va_start(args, format);
+ SkString s;
+ s.appendVAList(format, args);
+ fOut.writeText(s.c_str());
+}
+
+void SkJSONCanvas::open(const char* name) {
+ if (fFirstCommand) {
+ fFirstCommand = false;
+ }
+ else {
+ fOut.writeText(",");
+ }
+ this->writef("{\"" SKJSONCANVAS_COMMAND "\":\"%s\"", name);
+}
+
+void SkJSONCanvas::close() {
+ fOut.writeText("}");
+}
+
+void SkJSONCanvas::writeString(const char* name, const char* text) {
+ this->writeString(name, text, strlen(text));
+}
+
+void SkJSONCanvas::writeString(const char* name, const void* text, size_t length) {
+ // TODO: escaping
+ this->writef(",\"%s\":\"", name);
+ fOut.write(text, length);
+ fOut.writeText("\"");
+}
+
+void SkJSONCanvas::writePoint(const char* name, const SkPoint& point) {
+ this->writef(",\"%s\":[%f, %f]", name, point.x(), point.y());
+}
+
+void SkJSONCanvas::writeRect(const char* name, const SkRect& rect) {
+ this->writef(",\"%s\":[%f, %f, %f, %f]", name, rect.left(), rect.top(), rect.right(),
+ rect.bottom());
+}
+
+void SkJSONCanvas::writeRRect(const char* name, const SkRRect& rrect) {
+ SkRect rect = rrect.rect();
+ SkVector corner1 = rrect.radii(SkRRect::kUpperLeft_Corner);
+ SkVector corner2 = rrect.radii(SkRRect::kUpperRight_Corner);
+ SkVector corner3 = rrect.radii(SkRRect::kLowerLeft_Corner);
+ SkVector corner4 = rrect.radii(SkRRect::kLowerRight_Corner);
+ this->writef(",\"%s\":[[%f, %f, %f, %f],[%f, %f],[%f, %f],[%f, %f],[%f, %f]]", name,
+ rect.left(), rect.top(), rect.right(), rect.bottom(), corner1.x(), corner1.y(),
+ corner2.x(), corner2.y(), corner3.x(), corner3.y(), corner4.x(), corner4.y());
+}
+
+void SkJSONCanvas::writePath(const char* name, const SkPath& path) {
+ SkString text("[");
+ SkPath::Iter iter(path, false);
+ SkPoint pts[4];
+ bool first = true;
+ SkPath::Verb verb;
+ while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
+ if (first) {
+ first = false;
+ }
+ else {
+ text.append(",");
+ }
+ switch (verb) {
+ case SkPath::kLine_Verb:
+ text.appendf("{\"" SKJSONCANVAS_VERB_LINE "\":[%f,%f]}", pts[1].x(), pts[1].y());
+ break;
+ case SkPath::kQuad_Verb:
+ text.appendf("{\"" SKJSONCANVAS_VERB_QUAD "\":[[%f,%f],[%f,%f]]}", pts[1].x(),
+ pts[1].y(), pts[2].x(), pts[2].y());
+ break;
+ case SkPath::kCubic_Verb:
+ text.appendf("{\"" SKJSONCANVAS_VERB_CUBIC "\":[[%f,%f],[%f,%f],[%f,%f]]}",
+ pts[1].x(), pts[1].y(), pts[2].x(), pts[2].y(), pts[3].x(),
+ pts[3].y());
+ break;
+ case SkPath::kConic_Verb:
+ text.appendf("{\"" SKJSONCANVAS_VERB_CONIC "\":[[%f,%f],[%f,%f],%f]}", pts[1].x(),
+ pts[1].y(), pts[2].x(), pts[2].y(), iter.conicWeight());
+ break;
+ case SkPath::kMove_Verb:
+ text.appendf("{\"" SKJSONCANVAS_VERB_MOVE "\":[%f,%f]}", pts[0].x(), pts[0].y());
+ break;
+ case SkPath::kClose_Verb:
+ text.appendf("\"" SKJSONCANVAS_VERB_CLOSE "\"");
+ break;
+ case SkPath::kDone_Verb:
+ break;
+ }
+ }
+ text.appendf("]");
+ this->writef(",\"" SKJSONCANVAS_ATTRIBUTE_PATH "\":%s", text.c_str());
+}
+
+void SkJSONCanvas::writeRegion(const char* name, const SkRegion& region) {
+ this->writef(",\"%s\":\"<unimplemented>\"", name);
+}
+
+void SkJSONCanvas::writePaint(const SkPaint& paint) {
+ this->writef(",\"" SKJSONCANVAS_ATTRIBUTE_PAINT "\":{");
+ SkColor color = paint.getColor();
+ bool first = true;
+ if (color != SK_ColorBLACK) {
+ this->writef("\"" SKJSONCANVAS_ATTRIBUTE_COLOR "\":[%d,%d,%d,%d]", SkColorGetA(color),
+ SkColorGetR(color), SkColorGetG(color), SkColorGetB(color));
+ first = false;
+ }
+ SkPaint::Style style = paint.getStyle();
+ if (style != SkPaint::kFill_Style) {
+ if (first) {
+ first = false;
+ }
+ else {
+ fOut.writeText(",");
+ }
+ switch (style) {
+ case SkPaint::kStroke_Style:
+ fOut.writeText("\"" SKJSONCANVAS_ATTRIBUTE_STYLE "\":\""
+ SKJSONCANVAS_STYLE_STROKE "\"");
+ break;
+ case SkPaint::kStrokeAndFill_Style:
+ fOut.writeText("\"" SKJSONCANVAS_ATTRIBUTE_STYLE "\":\""
+ SKJSONCANVAS_STYLE_STROKEANDFILL "\"");
+ break;
+ default: SkASSERT(false);
+ }
+ }
+ SkScalar strokeWidth = paint.getStrokeWidth();
+ if (strokeWidth != 0.0f) {
+ if (first) {
+ first = false;
+ }
+ else {
+ fOut.writeText(",");
+ }
+ this->writef("\"" SKJSONCANVAS_ATTRIBUTE_STROKEWIDTH "\":%f", strokeWidth);
+ }
+ if (paint.isAntiAlias()) {
+ if (first) {
+ first = false;
+ }
+ else {
+ fOut.writeText(",");
+ }
+ fOut.writeText("\"" SKJSONCANVAS_ATTRIBUTE_ANTIALIAS "\":true");
+ }
+ fOut.writeText("}");
+}
+
+void SkJSONCanvas::writeMatrix(const char* name, const SkMatrix& matrix) {
+ this->writef(",\"%s\":[[%f,%f,%f],[%f,%f,%f],[%f,%f,%f]]", name,
+ matrix[0], matrix[1], matrix[2],
+ matrix[3], matrix[4], matrix[5],
+ matrix[6], matrix[7], matrix[8]);
+}
+
+void SkJSONCanvas::writeRegionOp(const char* name, SkRegion::Op op) {
+ this->writef(",\"%s\":\"", name);
+ switch (op) {
+ case SkRegion::kDifference_Op:
+ fOut.writeText(SKJSONCANVAS_REGIONOP_DIFFERENCE);
+ break;
+ case SkRegion::kIntersect_Op:
+ fOut.writeText(SKJSONCANVAS_REGIONOP_INTERSECT);
+ break;
+ case SkRegion::kUnion_Op:
+ fOut.writeText(SKJSONCANVAS_REGIONOP_UNION);
+ break;
+ case SkRegion::kXOR_Op:
+ fOut.writeText(SKJSONCANVAS_REGIONOP_XOR);
+ break;
+ case SkRegion::kReverseDifference_Op:
+ fOut.writeText(SKJSONCANVAS_REGIONOP_REVERSE_DIFFERENCE);
+ break;
+ case SkRegion::kReplace_Op:
+ fOut.writeText(SKJSONCANVAS_REGIONOP_REPLACE);
+ break;
+ default:
+ SkASSERT(false);
+ };
+ fOut.writeText("\"");
+}
+
+void SkJSONCanvas::writeEdgeStyle(const char* name, SkCanvas::ClipEdgeStyle edgeStyle) {
+ this->writef(",\"%s\":\"", name);
+ switch (edgeStyle) {
+ case SkCanvas::kHard_ClipEdgeStyle: fOut.writeText(SKJSONCANVAS_EDGESTYLE_HARD); break;
+ case SkCanvas::kSoft_ClipEdgeStyle: fOut.writeText(SKJSONCANVAS_EDGESTYLE_SOFT); break;
+ default: SkASSERT(false);
+ };
+ fOut.writeText("\"");
+}
+
+void SkJSONCanvas::writePointMode(const char* name, SkCanvas::PointMode mode) {
+ this->writef(",\"%s\":\"", name);
+ switch (mode) {
+ case SkCanvas::kPoints_PointMode: fOut.writeText(SKJSONCANVAS_POINTMODE_POINTS); break;
+ case SkCanvas::kLines_PointMode: fOut.writeText(SKJSONCANVAS_POINTMODE_LINES); break;
+ case SkCanvas::kPolygon_PointMode: fOut.writeText(SKJSONCANVAS_POINTMODE_POLYGON); break;
+ default: SkASSERT(false);
+ };
+ fOut.writeText("\"");
+}
+
+void SkJSONCanvas::updateMatrix() {
+ const SkMatrix& matrix = this->getTotalMatrix();
+ if (matrix != fLastMatrix) {
+ this->open(SKJSONCANVAS_COMMAND_MATRIX);
+ this->writeMatrix(SKJSONCANVAS_ATTRIBUTE_MATRIX, matrix);
+ fLastMatrix = matrix;
+ this->close();
+ }
+}
+
+void SkJSONCanvas::onDrawPaint(const SkPaint& paint) {
+ this->open(SKJSONCANVAS_COMMAND_PAINT);
+ this->writePaint(paint);
+ this->close();
+}
+
+void SkJSONCanvas::onDrawRect(const SkRect& rect, const SkPaint& paint) {
+ this->updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_RECT);
+ this->writeRect(SKJSONCANVAS_ATTRIBUTE_COORDS, rect);
+ this->writePaint(paint);
+ this->close();
+}
+
+void SkJSONCanvas::onDrawOval(const SkRect& rect, const SkPaint& paint) {
+ this->updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_OVAL);
+ this->writeRect(SKJSONCANVAS_ATTRIBUTE_COORDS, rect);
+ this->writePaint(paint);
+ this->close();
+}
+
+void SkJSONCanvas::onDrawRRect(const SkRRect& rrect, const SkPaint& paint) {
+ this->updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_RRECT);
+ this->writeRRect(SKJSONCANVAS_ATTRIBUTE_COORDS, rrect);
+ this->writePaint(paint);
+ this->close();}
+
+void SkJSONCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) {
+ this->updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_DRRECT);
+ this->writeRRect(SKJSONCANVAS_ATTRIBUTE_OUTER, outer);
+ this->writeRRect(SKJSONCANVAS_ATTRIBUTE_INNER, inner);
+ this->writePaint(paint);
+ this->close();
+}
+
+void SkJSONCanvas::onDrawPoints(SkCanvas::PointMode mode, size_t count, const SkPoint pts[],
+ const SkPaint& paint) {
+ this->updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_POINTS);
+ this->writePointMode(SKJSONCANVAS_ATTRIBUTE_MODE, mode);
+ fOut.writeText(",\"" SKJSONCANVAS_ATTRIBUTE_POINTS "\":[");
+ for (size_t i = 0; i < count; i++) {
+ if (i != 0) {
+ fOut.writeText(",");
+ }
+ this->writef("[%f,%f]", pts[i].x(), pts[i].y());
+ }
+ fOut.writeText("]");
+ this->writePaint(paint);
+ this->close();
+}
+
+void SkJSONCanvas::onDrawVertices(SkCanvas::VertexMode, int vertexCount, const SkPoint vertices[],
+ const SkPoint texs[], const SkColor colors[], SkXfermode*,
+ const uint16_t indices[], int indexCount, const SkPaint&) {
+ SkDebugf("unsupported: drawVertices\n");
+}
+
+void SkJSONCanvas::onDrawAtlas(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[],
+ int count, SkXfermode::Mode, const SkRect* cull, const SkPaint*) {
+ SkDebugf("unsupported: drawAtlas\n");
+}
+
+void SkJSONCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) {
+ this->updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_PATH);
+ this->writePath(SKJSONCANVAS_ATTRIBUTE_PATH, path);
+ this->writePaint(paint);
+ this->close();}
+
+void SkJSONCanvas::onDrawImage(const SkImage*, SkScalar dx, SkScalar dy, const SkPaint*) {
+ SkDebugf("unsupported: drawImage\n");
+}
+
+void SkJSONCanvas::onDrawImageRect(const SkImage*, const SkRect*, const SkRect&, const SkPaint*,
+ SkCanvas::SrcRectConstraint) {
+ SkDebugf("unsupported: drawImageRect\n");
+}
+
+void SkJSONCanvas::onDrawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
+ const SkPaint*) {
+ SkDebugf("unsupported: drawImageNine\n");
+}
+
+void SkJSONCanvas::onDrawBitmap(const SkBitmap&, SkScalar dx, SkScalar dy, const SkPaint*) {
+ SkDebugf("unsupported: drawBitmap\n");
+}
+
+void SkJSONCanvas::onDrawBitmapRect(const SkBitmap&, const SkRect*, const SkRect&, const SkPaint*,
+ SkCanvas::SrcRectConstraint) {
+ SkDebugf("unsupported: drawBitmapRect\n");
+}
+
+void SkJSONCanvas::onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
+ const SkPaint*) {
+ SkDebugf("unsupported: drawBitmapNine\n");
+}
+
+void SkJSONCanvas::onDrawText(const void* text, size_t byteLength, SkScalar x,
+ SkScalar y, const SkPaint& paint) {
+ this->updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_TEXT);
+ this->writeString(SKJSONCANVAS_ATTRIBUTE_TEXT, text, byteLength);
+ this->writePoint(SKJSONCANVAS_ATTRIBUTE_COORDS, { x, y });
+ this->writePaint(paint);
+ this->close();
+}
+
+void SkJSONCanvas::onDrawPosText(const void* text, size_t byteLength,
+ const SkPoint pos[], const SkPaint& paint) {
+ SkDebugf("unsupported: drawPosText\n");
+}
+
+void SkJSONCanvas::onDrawPosTextH(const void* text, size_t byteLength,
+ const SkScalar xpos[], SkScalar constY,
+ const SkPaint& paint) {
+ SkDebugf("unsupported: drawPosTextH\n");
+}
+
+void SkJSONCanvas::onDrawTextOnPath(const void* text, size_t byteLength,
+ const SkPath& path, const SkMatrix* matrix,
+ const SkPaint& paint) {
+ SkDebugf("unsupported: drawTextOnPath\n");
+}
+
+void SkJSONCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
+ const SkPaint& paint) {
+ SkDebugf("unsupported: drawTextBlob\n");
+}
+
+void SkJSONCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
+ const SkPoint texCoords[4], SkXfermode* xmode,
+ const SkPaint& paint) {
+ SkDebugf("unsupported: drawPatch\n");
+}
+
+void SkJSONCanvas::onDrawDrawable(SkDrawable*, const SkMatrix*) {
+ SkDebugf("unsupported: drawDrawable\n");
+}
+
+void SkJSONCanvas::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
+ this->updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_CLIPRECT);
+ this->writeRect(SKJSONCANVAS_ATTRIBUTE_COORDS, rect);
+ this->writeRegionOp(SKJSONCANVAS_ATTRIBUTE_REGIONOP, op);
+ this->writeEdgeStyle(SKJSONCANVAS_ATTRIBUTE_EDGESTYLE, edgeStyle);
+ this->close();
+}
+
+void SkJSONCanvas::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
+ this->updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_CLIPRRECT);
+ this->writeRRect(SKJSONCANVAS_ATTRIBUTE_COORDS, rrect);
+ this->writeRegionOp(SKJSONCANVAS_ATTRIBUTE_REGIONOP, op);
+ this->writeEdgeStyle(SKJSONCANVAS_ATTRIBUTE_EDGESTYLE, edgeStyle);
+ this->close();
+}
+
+void SkJSONCanvas::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
+ updateMatrix();
+ this->open(SKJSONCANVAS_COMMAND_CLIPPATH);
+ this->writePath(SKJSONCANVAS_ATTRIBUTE_PATH, path);
+ this->writeRegionOp(SKJSONCANVAS_ATTRIBUTE_REGIONOP, op);
+ this->writeEdgeStyle(SKJSONCANVAS_ATTRIBUTE_EDGESTYLE, edgeStyle);
+ this->close();
+}
+
+void SkJSONCanvas::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
+ this->open(SKJSONCANVAS_COMMAND_CLIPREGION);
+ this->writeRegion(SKJSONCANVAS_ATTRIBUTE_DEVICEREGION, deviceRgn);
+ this->writeRegionOp(SKJSONCANVAS_ATTRIBUTE_REGIONOP, op);
+ this->close();
+}
+
+void SkJSONCanvas::willSave() {
+ this->open(SKJSONCANVAS_COMMAND_SAVE);
+ this->close();
+}
+
+void SkJSONCanvas::willRestore() {
+ this->open(SKJSONCANVAS_COMMAND_RESTORE);
+ this->close();
+}