| /* |
| * 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 "gm.h" |
| #include "SkColor.h" |
| #include "SkMatrixImageFilter.h" |
| |
| namespace skiagm { |
| |
| class MatrixImageFilterGM : public GM { |
| public: |
| MatrixImageFilterGM() { |
| this->setBGColor(0x00000000); |
| } |
| |
| protected: |
| virtual SkString onShortName() { |
| return SkString("matriximagefilter"); |
| } |
| |
| void draw(SkCanvas* canvas, const SkRect& rect, const SkBitmap& bitmap, |
| const SkMatrix& matrix, SkPaint::FilterLevel filterLevel) { |
| SkAutoTUnref<SkImageFilter> imageFilter( |
| SkMatrixImageFilter::Create(matrix, filterLevel)); |
| SkPaint paint; |
| paint.setImageFilter(imageFilter.get()); |
| canvas->saveLayer(&rect, &paint); |
| canvas->drawBitmap(bitmap, 0, 0); |
| canvas->restore(); |
| } |
| |
| virtual SkISize onISize() { |
| return make_isize(420, 100); |
| } |
| |
| void make_checkerboard(SkBitmap* bitmap) { |
| bitmap->allocN32Pixels(64, 64); |
| SkCanvas canvas(*bitmap); |
| SkPaint darkPaint; |
| darkPaint.setColor(0xFF404040); |
| SkPaint lightPaint; |
| lightPaint.setColor(0xFFA0A0A0); |
| for (int y = 0; y < 64; y += 32) { |
| for (int x = 0; x < 64; x += 32) { |
| canvas.save(); |
| canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); |
| canvas.drawRect(SkRect::MakeXYWH(0, 0, 16, 16), darkPaint); |
| canvas.drawRect(SkRect::MakeXYWH(16, 0, 16, 16), lightPaint); |
| canvas.drawRect(SkRect::MakeXYWH(0, 16, 16, 16), lightPaint); |
| canvas.drawRect(SkRect::MakeXYWH(16, 16, 16, 16), darkPaint); |
| canvas.restore(); |
| } |
| } |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| canvas->clear(0x00000000); |
| SkMatrix matrix; |
| SkScalar margin = SkIntToScalar(10); |
| matrix.setSkew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2)); |
| SkBitmap checkerboard; |
| make_checkerboard(&checkerboard); |
| |
| SkRect srcRect = SkRect::MakeWH(96, 96); |
| |
| canvas->translate(margin, margin); |
| draw(canvas, srcRect, checkerboard, matrix, SkPaint::kNone_FilterLevel); |
| |
| canvas->translate(srcRect.width() + margin, 0); |
| draw(canvas, srcRect, checkerboard, matrix, SkPaint::kLow_FilterLevel); |
| |
| canvas->translate(srcRect.width() + margin, 0); |
| draw(canvas, srcRect, checkerboard, matrix, SkPaint::kMedium_FilterLevel); |
| |
| canvas->translate(srcRect.width() + margin, 0); |
| draw(canvas, srcRect, checkerboard, matrix, SkPaint::kHigh_FilterLevel); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new MatrixImageFilterGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |