| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "Test.h" |
| |
| #include "../include/core/SkCanvas.h" |
| #include "../include/core/SkPicture.h" |
| #include "../include/core/SkStream.h" |
| #include "../include/core/SkString.h" |
| #include "../include/core/SkPictureRecorder.h" |
| #include <cstring> |
| |
| // Verify that replay of a recording into a clipped canvas |
| // produces the correct bitmap. |
| // This arose from http://crbug.com/401593 which has |
| // https://code.google.com/p/skia/issues/detail?id=1291 as its root cause. |
| |
| namespace { |
| |
| class Drawer { |
| public: |
| explicit Drawer() : fImageInfo(SkImageInfo::MakeN32Premul(200, 100)) { |
| fCircleBM.allocPixels(SkImageInfo::MakeN32Premul(100, 100)); |
| SkCanvas canvas(fCircleBM); |
| canvas.clear(0xffffffff); |
| SkPaint circlePaint; |
| circlePaint.setColor(0xff000000); |
| canvas.drawCircle(50, 50, 50, circlePaint); |
| } |
| |
| const SkImageInfo& imageInfo() const { return fImageInfo; } |
| |
| void draw(SkCanvas* canvas, const SkRect& clipRect, SkXfermode::Mode mode) const { |
| SkPaint greenPaint; |
| greenPaint.setColor(0xff008000); |
| SkPaint blackPaint; |
| blackPaint.setColor(0xff000000); |
| SkPaint whitePaint; |
| whitePaint.setColor(0xffffffff); |
| SkPaint layerPaint; |
| layerPaint.setColor(0xff000000); |
| layerPaint.setXfermodeMode(mode); |
| SkRect canvasRect(SkRect::MakeWH(SkIntToScalar(fImageInfo.width()), |
| SkIntToScalar(fImageInfo.height()))); |
| |
| canvas->clipRect(clipRect); |
| canvas->clear(0xff000000); |
| |
| canvas->saveLayer(NULL, &blackPaint); |
| canvas->drawRect(canvasRect, greenPaint); |
| canvas->saveLayer(NULL, &layerPaint); |
| canvas->drawBitmapRect(fCircleBM, SkRect::MakeXYWH(20,20,60,60), &blackPaint); |
| canvas->restore(); |
| canvas->restore(); |
| } |
| |
| private: |
| const SkImageInfo fImageInfo; |
| SkBitmap fCircleBM; |
| }; |
| |
| class RecordingStrategy { |
| public: |
| virtual ~RecordingStrategy() {} |
| virtual const SkBitmap& recordAndReplay(const Drawer& drawer, |
| const SkRect& intoClip, |
| SkXfermode::Mode) = 0; |
| }; |
| |
| class BitmapBackedCanvasStrategy : public RecordingStrategy { |
| // This version just draws into a bitmap-backed canvas. |
| public: |
| BitmapBackedCanvasStrategy(const SkImageInfo& imageInfo) { |
| fBitmap.allocPixels(imageInfo); |
| } |
| |
| virtual const SkBitmap& recordAndReplay(const Drawer& drawer, |
| const SkRect& intoClip, |
| SkXfermode::Mode mode) { |
| SkCanvas canvas(fBitmap); |
| canvas.clear(0xffffffff); |
| // Note that the scene is drawn just into the clipped region! |
| canvas.clipRect(intoClip); |
| drawer.draw(&canvas, intoClip, mode); // Shouild be canvas-wide... |
| return fBitmap; |
| } |
| |
| private: |
| SkBitmap fBitmap; |
| }; |
| |
| class PictureStrategy : public RecordingStrategy { |
| // This version draws the entire scene into an SkPictureRecorder. |
| // Then it then replays the scene through a clip rectangle. |
| // This backend proved to be buggy. |
| public: |
| PictureStrategy(const SkImageInfo& imageInfo) { |
| fBitmap.allocPixels(imageInfo); |
| fWidth = imageInfo.width(); |
| fHeight = imageInfo.height(); |
| } |
| |
| virtual const SkBitmap& recordAndReplay(const Drawer& drawer, |
| const SkRect& intoClip, |
| SkXfermode::Mode mode) { |
| SkTileGridFactory::TileGridInfo tileGridInfo = { {100,100}, {0,0}, {0,0} }; |
| SkTileGridFactory factory(tileGridInfo); |
| SkPictureRecorder recorder; |
| SkRect canvasRect(SkRect::MakeWH(SkIntToScalar(fWidth),SkIntToScalar(fHeight))); |
| SkCanvas* canvas = recorder.beginRecording(SkIntToScalar(fWidth), |
| SkIntToScalar(fHeight), |
| &factory); |
| drawer.draw(canvas, canvasRect, mode); |
| SkAutoTDelete<SkPicture> picture(recorder.endRecording()); |
| |
| SkCanvas replayCanvas(fBitmap); |
| replayCanvas.clear(0xffffffff); |
| replayCanvas.clipRect(intoClip); |
| picture->playback(&replayCanvas); |
| return fBitmap; |
| } |
| |
| private: |
| SkBitmap fBitmap; |
| int fWidth; |
| int fHeight; |
| }; |
| |
| } // namespace |
| |
| |
| DEF_TEST(SkRecordingAccuracyXfermode, reporter) { |
| #define FINEGRAIN 0 |
| const Drawer drawer; |
| |
| BitmapBackedCanvasStrategy golden(drawer.imageInfo()); |
| PictureStrategy picture(drawer.imageInfo()); |
| |
| #if !FINEGRAIN |
| unsigned numErrors = 0; |
| SkString errors; |
| #endif |
| |
| for (int iMode = 0; iMode < int(SkXfermode::kLastMode); iMode++) { |
| const SkRect& clip = SkRect::MakeXYWH(100, 0, 100, 100); |
| SkXfermode::Mode mode = SkXfermode::Mode(iMode); |
| |
| const SkBitmap& goldenBM = golden.recordAndReplay(drawer, clip, mode); |
| const SkBitmap& pictureBM = picture.recordAndReplay(drawer, clip, mode); |
| |
| size_t pixelsSize = goldenBM.getSize(); |
| REPORTER_ASSERT(reporter, pixelsSize == pictureBM.getSize()); |
| |
| // The pixel arrays should match. |
| #if FINEGRAIN |
| REPORTER_ASSERT(reporter, |
| 0 == memcmp(goldenBM.getPixels(), pictureBM.getPixels(), pixelsSize)); |
| #else |
| if (memcmp(goldenBM.getPixels(), pictureBM.getPixels(), pixelsSize)) { |
| numErrors++; |
| errors.appendf("For SkXfermode %d %s: SkPictureRecorder bitmap is wrong\n", |
| iMode, SkXfermode::ModeName(mode)); |
| } |
| #endif |
| } |
| |
| #if !FINEGRAIN |
| REPORTER_ASSERT_MESSAGE(reporter, 0 == numErrors, errors.c_str()); |
| #endif |
| } |