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Diffstat (limited to 'gm/matriximagefilter.cpp')
-rw-r--r-- | gm/matriximagefilter.cpp | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/gm/matriximagefilter.cpp b/gm/matriximagefilter.cpp new file mode 100644 index 0000000000..ac8b94f148 --- /dev/null +++ b/gm/matriximagefilter.cpp @@ -0,0 +1,97 @@ +/* + * 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); + SkPaint paint; + SkMatrix matrix; + SkScalar margin = SkIntToScalar(10); + matrix.setSkew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2)); + SkRect srcBounds; + SkBitmap checkerboard; + make_checkerboard(&checkerboard); + checkerboard.getBounds(&srcBounds); + // Outer paint does no filtering; leave it all for the filter + paint.setFilterLevel(SkPaint::kNone_FilterLevel); + + 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); + +} |