AuroraMiddleware/skia2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Initial support for turning Skia draws into a JSON document and vice versa.

Browse Source 
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
This commit is contained in:
ethannicholas 2016-01-26 07:47:57 -08:00 committed by Commit bot
parent a766ca87bf
commit 978d08a4a9
6 changed files with 983 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
gyp/json.gyp Normal file
View File

@ -0,0 +1,26 @@
# Copyright 2015 Google Inc.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
{
'targets': [
{
'target_name': 'json',
'product_name': 'skia_json',
'type': 'static_library',
'standalone_static_library': 1,
'dependencies': [
'core.gyp:core',
'jsoncpp.gyp:jsoncpp',
],
'include_dirs': [
'../include/utils',
'../src/core',
],
'sources': [
'../tools/json/SkJSONCanvas.cpp',
'../tools/json/SkJSONRenderer.cpp',
],
},
],
}

1
gyp/most.gyp
View File

@ -82,6 +82,7 @@
[ 'skia_build_server', {
'dependencies': [
'skiaserve.gyp:skiaserve',
'json.gyp:json',
],
}],
],

428
tools/json/SkJSONCanvas.cpp Normal file
View File

@ -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();
}

217
tools/json/SkJSONCanvas.h Normal file
View File

@ -0,0 +1,217 @@
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkJSONCanvas_DEFINED
#define SkJSONCanvas_DEFINED
#include "SkCanvas.h"
#include "SkStream.h"
#define SKJSONCANVAS_VERSION "version"
#define SKJSONCANVAS_COMMANDS "commands"
#define SKJSONCANVAS_COMMAND "command"
#define SKJSONCANVAS_COMMAND_MATRIX "Matrix"
#define SKJSONCANVAS_COMMAND_PAINT "Paint"
#define SKJSONCANVAS_COMMAND_RECT "Rect"
#define SKJSONCANVAS_COMMAND_OVAL "Oval"
#define SKJSONCANVAS_COMMAND_RRECT "RRect"
#define SKJSONCANVAS_COMMAND_DRRECT "DRRect"
#define SKJSONCANVAS_COMMAND_POINTS "Points"
#define SKJSONCANVAS_COMMAND_VERTICES "Vertices"
#define SKJSONCANVAS_COMMAND_ATLAS "Atlas"
#define SKJSONCANVAS_COMMAND_PATH "Path"
#define SKJSONCANVAS_COMMAND_IMAGE "Image"
#define SKJSONCANVAS_COMMAND_IMAGERECT "ImageRect"
#define SKJSONCANVAS_COMMAND_IMAGENINE "ImageNine"
#define SKJSONCANVAS_COMMAND_BITMAP "Bitmap"
#define SKJSONCANVAS_COMMAND_BITMAPRECT "BitmapRect"
#define SKJSONCANVAS_COMMAND_BITMAPNINE "BitmapNine"
#define SKJSONCANVAS_COMMAND_TEXT "Text"
#define SKJSONCANVAS_COMMAND_POSTEXT "PosText"
#define SKJSONCANVAS_COMMAND_POSTEXTH "PosTextH"
#define SKJSONCANVAS_COMMAND_TEXTONPATH "TextOnPath"
#define SKJSONCANVAS_COMMAND_TEXTBLOB "TextBlob"
#define SKJSONCANVAS_COMMAND_PATCH "Patch"
#define SKJSONCANVAS_COMMAND_DRAWABLE "Drawable"
#define SKJSONCANVAS_COMMAND_CLIPRECT "ClipRect"
#define SKJSONCANVAS_COMMAND_CLIPRRECT "ClipRRect"
#define SKJSONCANVAS_COMMAND_CLIPPATH "ClipPath"
#define SKJSONCANVAS_COMMAND_CLIPREGION "ClipRegion"
#define SKJSONCANVAS_COMMAND_SAVE "Save"
#define SKJSONCANVAS_COMMAND_RESTORE "Restore"
#define SKJSONCANVAS_ATTRIBUTE_MATRIX "matrix"
#define SKJSONCANVAS_ATTRIBUTE_COORDS "coords"
#define SKJSONCANVAS_ATTRIBUTE_PAINT "paint"
#define SKJSONCANVAS_ATTRIBUTE_OUTER "outer"
#define SKJSONCANVAS_ATTRIBUTE_INNER "inner"
#define SKJSONCANVAS_ATTRIBUTE_MODE "mode"
#define SKJSONCANVAS_ATTRIBUTE_POINTS "points"
#define SKJSONCANVAS_ATTRIBUTE_PATH "path"
#define SKJSONCANVAS_ATTRIBUTE_TEXT "text"
#define SKJSONCANVAS_ATTRIBUTE_COLOR "color"
#define SKJSONCANVAS_ATTRIBUTE_STYLE "style"
#define SKJSONCANVAS_ATTRIBUTE_STROKEWIDTH "strokeWidth"
#define SKJSONCANVAS_ATTRIBUTE_ANTIALIAS "antiAlias"
#define SKJSONCANVAS_ATTRIBUTE_REGIONOP "op"
#define SKJSONCANVAS_ATTRIBUTE_EDGESTYLE "edgeStyle"
#define SKJSONCANVAS_ATTRIBUTE_DEVICEREGION "deviceRegion"
#define SKJSONCANVAS_VERB_MOVE "move"
#define SKJSONCANVAS_VERB_LINE "line"
#define SKJSONCANVAS_VERB_QUAD "quad"
#define SKJSONCANVAS_VERB_CUBIC "cubic"
#define SKJSONCANVAS_VERB_CONIC "conic"
#define SKJSONCANVAS_VERB_CLOSE "close"
#define SKJSONCANVAS_STYLE_FILL "fill"
#define SKJSONCANVAS_STYLE_STROKE "stroke"
#define SKJSONCANVAS_STYLE_STROKEANDFILL "strokeAndFill"
#define SKJSONCANVAS_EDGESTYLE_HARD "hard"
#define SKJSONCANVAS_EDGESTYLE_SOFT "soft"
#define SKJSONCANVAS_POINTMODE_POINTS "points"
#define SKJSONCANVAS_POINTMODE_LINES "lines"
#define SKJSONCANVAS_POINTMODE_POLYGON "polygon"
#define SKJSONCANVAS_REGIONOP_DIFFERENCE "difference"
#define SKJSONCANVAS_REGIONOP_INTERSECT "intersect"
#define SKJSONCANVAS_REGIONOP_UNION "union"
#define SKJSONCANVAS_REGIONOP_XOR "xor"
#define SKJSONCANVAS_REGIONOP_REVERSE_DIFFERENCE "reverseDifference"
#define SKJSONCANVAS_REGIONOP_REPLACE "replace"
/*
* Implementation of SkCanvas which writes JSON when drawn to. The JSON describes all of the draw
* commands issued to the canvas, and can later be turned back into draw commands using
* SkJSONRenderer. Be sure to call finish() when you are done drawing.
*/
class SkJSONCanvas : public SkCanvas {
public:
/* Create a canvas which writes to the specified output stream. */
SkJSONCanvas(int width, int height, SkWStream& out);
/* Complete the JSON document. */
void finish();
// overridden SkCanvas API
void onDrawPaint(const SkPaint&) override;
void onDrawRect(const SkRect&, const SkPaint&) override;
void onDrawOval(const SkRect&, const SkPaint&) override;
void onDrawRRect(const SkRRect&, const SkPaint&) override;
void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
void onDrawPoints(SkCanvas::PointMode, size_t count, const SkPoint pts[],
const SkPaint&) override;
void onDrawVertices(SkCanvas::VertexMode, int vertexCount, const SkPoint vertices[],
const SkPoint texs[], const SkColor colors[], SkXfermode*,
const uint16_t indices[], int indexCount, const SkPaint&) override;
void onDrawAtlas(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[],
int count, SkXfermode::Mode, const SkRect* cull, const SkPaint*) override;
void onDrawPath(const SkPath&, const SkPaint&) override;
void onDrawImage(const SkImage*, SkScalar dx, SkScalar dy, const SkPaint*) override;
void onDrawImageRect(const SkImage*, const SkRect*, const SkRect&, const SkPaint*,
SrcRectConstraint) override;
void onDrawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
const SkPaint*) override;
void onDrawBitmap(const SkBitmap&, SkScalar dx, SkScalar dy, const SkPaint*) override;
void onDrawBitmapRect(const SkBitmap&, const SkRect*, const SkRect&, const SkPaint*,
SkCanvas::SrcRectConstraint) override;
void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
const SkPaint*) override;
void onDrawText(const void* text, size_t byteLength, SkScalar x,
SkScalar y, const SkPaint& paint) override;
void onDrawPosText(const void* text, size_t byteLength,
const SkPoint pos[], const SkPaint& paint) override;
void onDrawPosTextH(const void* text, size_t byteLength,
const SkScalar xpos[], SkScalar constY,
const SkPaint& paint) override;
void onDrawTextOnPath(const void* text, size_t byteLength,
const SkPath& path, const SkMatrix* matrix,
const SkPaint& paint) override;
void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
const SkPaint& paint) override;
void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint) override;
void onDrawDrawable(SkDrawable*, const SkMatrix*) override;
void onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) override;
void onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) override;
void onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) override;
void onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) override;
void willSave() override;
void willRestore() override;
private:
void writef(const char* fmt, ...);
void open(const char* name);
void close();
void writeString(const char* name, const char* text);
void writeString(const char* name, const void* text, size_t length);
void writePoint(const char* name, const SkPoint& point);
void writeRect(const char* name, const SkRect& rect);
void writeRRect(const char* name, const SkRRect& rrect);
void writePath(const char* name, const SkPath& path);
void writeRegion(const char* name, const SkRegion& region);
void writePaint(const SkPaint& paint);
void writeRegionOp(const char* name, SkRegion::Op op);
void writeEdgeStyle(const char* name, SkCanvas::ClipEdgeStyle edgeStyle);
void writePointMode(const char* name, SkCanvas::PointMode mode);
void writeMatrix(const char* name, const SkMatrix& matrix);
void updateMatrix();
SkWStream& fOut;
SkMatrix fLastMatrix;
bool fFirstCommand;
typedef SkCanvas INHERITED;
};
#endif

289
tools/json/SkJSONRenderer.cpp Normal file
View File

@ -0,0 +1,289 @@
/*
* 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 "SkJSONRenderer.h"
#include "SkJSONCanvas.h"
#include "SkJSONCPP.h"
#include "SkPath.h"
namespace SkJSONRenderer {
class Renderer {
public:
void getPaint(Json::Value& command, SkPaint* paint);
void getRect(Json::Value& command, const char* name, SkRect* rect);
void getRRect(Json::Value& command, const char* name, SkRRect* rrect);
void processCommand(Json::Value& command, SkCanvas* target);
void processMatrix(Json::Value& command, SkCanvas* target);
void processSave(Json::Value& command, SkCanvas* target);
void processRestore(Json::Value& command, SkCanvas* target);
void processPaint(Json::Value& command, SkCanvas* target);
void processRect(Json::Value& command, SkCanvas* target);
void processRRect(Json::Value& command, SkCanvas* target);
void processOval(Json::Value& command, SkCanvas* target);
void processPath(Json::Value& command, SkCanvas* target);
void processText(Json::Value& command, SkCanvas* target);
void processPoints(Json::Value& command, SkCanvas* target);
void processClipRect(Json::Value& command, SkCanvas* target);
};
void Renderer::processCommand(Json::Value& command, SkCanvas* target) {
const char* name = command[SKJSONCANVAS_COMMAND].asCString();
// TODO speed this up with a hash
if (!strcmp(name, SKJSONCANVAS_COMMAND_MATRIX)) {
this->processMatrix(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_SAVE)) {
this->processSave(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_RESTORE)) {
this->processRestore(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_PAINT)) {
this->processPaint(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_RECT)) {
this->processRect(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_RRECT)) {
this->processRRect(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_OVAL)) {
this->processOval(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_PATH)) {
this->processPath(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_TEXT)) {
this->processText(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_POINTS)) {
this->processPoints(command, target);
}
else if (!strcmp(name, SKJSONCANVAS_COMMAND_CLIPRECT)) {
this->processClipRect(command, target);
}
else {
SkDebugf("unsupported JSON command: %s\n", name);
}
}
void Renderer::getPaint(Json::Value& command, SkPaint* result) {
Json::Value jsonPaint = command[SKJSONCANVAS_ATTRIBUTE_PAINT];
if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_COLOR)) {
Json::Value color = jsonPaint[SKJSONCANVAS_ATTRIBUTE_COLOR];
result->setColor(SkColorSetARGB(color[0].asInt(), color[1].asInt(), color[2].asInt(),
color[3].asInt()));
}
if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_STYLE)) {
const char* style = jsonPaint[SKJSONCANVAS_ATTRIBUTE_STYLE].asCString();
if (!strcmp(style, SKJSONCANVAS_STYLE_FILL)) {
result->setStyle(SkPaint::kFill_Style);
}
else if (!strcmp(style, SKJSONCANVAS_STYLE_STROKE)) {
result->setStyle(SkPaint::kStroke_Style);
}
else if (!strcmp(style, SKJSONCANVAS_STYLE_STROKEANDFILL)) {
result->setStyle(SkPaint::kStrokeAndFill_Style);
}
}
if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_STROKEWIDTH)) {
float strokeWidth = jsonPaint[SKJSONCANVAS_ATTRIBUTE_STROKEWIDTH].asFloat();
result->setStrokeWidth(strokeWidth);
}
if (jsonPaint.isMember(SKJSONCANVAS_ATTRIBUTE_ANTIALIAS)) {
result->setAntiAlias(jsonPaint[SKJSONCANVAS_ATTRIBUTE_ANTIALIAS].asBool());
}
}
void Renderer::getRect(Json::Value& command, const char* name, SkRect* result) {
Json::Value rect = command[name];
result->set(rect[0].asFloat(), rect[1].asFloat(), rect[2].asFloat(), rect[3].asFloat());
}
void Renderer::getRRect(Json::Value& command, const char* name, SkRRect* result) {
Json::Value rrect = command[name];
SkVector radii[4] = {
{ rrect[1][0].asFloat(), rrect[1][1].asFloat() },
{ rrect[2][0].asFloat(), rrect[2][1].asFloat() },
{ rrect[3][0].asFloat(), rrect[3][1].asFloat() },
{ rrect[4][0].asFloat(), rrect[4][1].asFloat() }
};
result->setRectRadii(SkRect::MakeLTRB(rrect[0][0].asFloat(), rrect[0][1].asFloat(),
rrect[0][2].asFloat(), rrect[0][3].asFloat()),
radii);
}
void Renderer::processMatrix(Json::Value& command, SkCanvas* target) {
Json::Value jsonMatrix = command[SKJSONCANVAS_ATTRIBUTE_MATRIX];
SkMatrix matrix;
SkScalar values[] = {
jsonMatrix[0][0].asFloat(), jsonMatrix[0][1].asFloat(), jsonMatrix[0][2].asFloat(),
jsonMatrix[1][0].asFloat(), jsonMatrix[1][1].asFloat(), jsonMatrix[1][2].asFloat(),
jsonMatrix[2][0].asFloat(), jsonMatrix[2][1].asFloat(), jsonMatrix[2][2].asFloat()
};
matrix.set9(values);
target->setMatrix(matrix);
}
void Renderer::processSave(Json::Value& command, SkCanvas* target) {
target->save();
}
void Renderer::processRestore(Json::Value& command, SkCanvas* target) {
target->restore();
}
void Renderer::processPaint(Json::Value& command, SkCanvas* target) {
SkPaint paint;
this->getPaint(command, &paint);
target->drawPaint(paint);
}
void Renderer::processRect(Json::Value& command, SkCanvas* target) {
SkRect rect;
this->getRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rect);
SkPaint paint;
this->getPaint(command, &paint);
target->drawRect(rect, paint);
}
void Renderer::processRRect(Json::Value& command, SkCanvas* target) {
SkRRect rrect;
this->getRRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rrect);
SkPaint paint;
this->getPaint(command, &paint);
target->drawRRect(rrect, paint);
}
void Renderer::processOval(Json::Value& command, SkCanvas* target) {
SkRect rect;
this->getRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rect);
SkPaint paint;
this->getPaint(command, &paint);
target->drawOval(rect, paint);
}
void Renderer::processPath(Json::Value& command, SkCanvas* target) {
Json::Value jsonPath = command[SKJSONCANVAS_ATTRIBUTE_PATH];
SkPath path;
for (Json::ArrayIndex i = 0; i < jsonPath.size(); i++) {
Json::Value verb = jsonPath[i];
if (verb.isString()) {
SkASSERT(!strcmp(verb.asCString(), SKJSONCANVAS_VERB_CLOSE));
path.close();
}
else {
if (verb.isMember(SKJSONCANVAS_VERB_MOVE)) {
Json::Value move = verb[SKJSONCANVAS_VERB_MOVE];
path.moveTo(move[0].asFloat(), move[1].asFloat());
}
else if (verb.isMember(SKJSONCANVAS_VERB_LINE)) {
Json::Value line = verb[SKJSONCANVAS_VERB_LINE];
path.lineTo(line[0].asFloat(), line[1].asFloat());
}
else if (verb.isMember(SKJSONCANVAS_VERB_QUAD)) {
Json::Value quad = verb[SKJSONCANVAS_VERB_QUAD];
path.quadTo(quad[0][0].asFloat(), quad[0][1].asFloat(),
quad[1][0].asFloat(), quad[1][1].asFloat());
}
else if (verb.isMember(SKJSONCANVAS_VERB_CUBIC)) {
Json::Value cubic = verb[SKJSONCANVAS_VERB_CUBIC];
path.cubicTo(cubic[0][0].asFloat(), cubic[0][1].asFloat(),
cubic[1][0].asFloat(), cubic[1][1].asFloat(),
cubic[2][0].asFloat(), cubic[2][1].asFloat());
}
else if (verb.isMember(SKJSONCANVAS_VERB_CONIC)) {
Json::Value conic = verb[SKJSONCANVAS_VERB_CONIC];
path.conicTo(conic[0][0].asFloat(), conic[0][1].asFloat(),
conic[1][0].asFloat(), conic[1][1].asFloat(),
conic[2].asFloat());
}
else {
SkASSERT(false);
}
}
}
SkPaint paint;
this->getPaint(command, &paint);
target->drawPath(path, paint);
}
void Renderer::processText(Json::Value& command, SkCanvas* target) {
const char* text = command[SKJSONCANVAS_ATTRIBUTE_TEXT].asCString();
SkPaint paint;
this->getPaint(command, &paint);
Json::Value coords = command[SKJSONCANVAS_ATTRIBUTE_COORDS];
target->drawText(text, strlen(text), coords[0].asFloat(), coords[1].asFloat(), paint);
}
void Renderer::processPoints(Json::Value& command, SkCanvas* target) {
SkCanvas::PointMode mode;
const char* jsonMode = command[SKJSONCANVAS_ATTRIBUTE_MODE].asCString();
if (!strcmp(jsonMode, SKJSONCANVAS_POINTMODE_POINTS)) {
mode = SkCanvas::kPoints_PointMode;
}
else if (!strcmp(jsonMode, SKJSONCANVAS_POINTMODE_LINES)) {
mode = SkCanvas::kLines_PointMode;
}
else if (!strcmp(jsonMode, SKJSONCANVAS_POINTMODE_POLYGON)) {
mode = SkCanvas::kPolygon_PointMode;
}
else {
SkASSERT(false);
return;
}
Json::Value jsonPoints = command[SKJSONCANVAS_ATTRIBUTE_POINTS];
int count = (int) jsonPoints.size();
SkPoint* points = (SkPoint*) sk_malloc_throw(count * sizeof(SkPoint));
for (int i = 0; i < count; i++) {
points[i] = SkPoint::Make(jsonPoints[i][0].asFloat(), jsonPoints[i][1].asFloat());
}
SkPaint paint;
this->getPaint(command, &paint);
target->drawPoints(mode, count, points, paint);
free(points);
}
void Renderer::processClipRect(Json::Value& command, SkCanvas* target) {
SkRect rect;
this->getRect(command, SKJSONCANVAS_ATTRIBUTE_COORDS, &rect);
target->clipRect(rect);
}
void render(const char* json, SkCanvas* target) {
Renderer renderer;
Json::Reader reader;
Json::Value root;
if (reader.parse(std::string(json), root)) {
SkASSERT(root[SKJSONCANVAS_VERSION].asInt() == 1);
Json::Value commands = root[SKJSONCANVAS_COMMANDS];
for (Json::ArrayIndex i = 0; i < commands.size(); i++) {
renderer.processCommand(commands[i], target);
}
}
else {
SkDebugf(json);
SkFAIL("json parse failure");
}
}
} // namespace

22
tools/json/SkJSONRenderer.h Normal file
View File

@ -0,0 +1,22 @@
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkJSONRenderer_DEFINED
#define SkJSONRenderer_DEFINED
#include "SkCanvas.h"
namespace SkJSONRenderer {
/*
* Takes a JSON document produced by SkJSONCanvas and issues its draw commands to the target
* canvas.
*/
void render(const char* json, SkCanvas* target);
}
#endif