| /* |
| * 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/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkImage.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkScalar.h" |
| #include "include/effects/SkImageFilters.h" |
| |
| static void draw(SkCanvas* canvas, const SkRect& rect, const SkBitmap& bitmap, |
| const SkMatrix& matrix, const SkSamplingOptions& sampling) { |
| SkPaint paint; |
| paint.setImageFilter(SkImageFilters::MatrixTransform(matrix, sampling, nullptr)); |
| canvas->saveLayer(&rect, &paint); |
| canvas->drawImage(bitmap.asImage(), 0, 0, sampling); |
| canvas->restore(); |
| } |
| |
| static 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(); |
| } |
| } |
| } |
| |
| DEF_SIMPLE_GM_BG(matriximagefilter, canvas, 420, 100, SK_ColorBLACK) { |
| 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, SkSamplingOptions()); |
| |
| canvas->translate(srcRect.width() + margin, 0); |
| draw(canvas, srcRect, checkerboard, matrix, SkSamplingOptions(SkFilterMode::kLinear)); |
| } |