| /* |
| * Copyright 2018 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 "sk_tool_utils.h" |
| #include "SkCanvas.h" |
| #include "SkImage.h" |
| #include "SkShaderMaskFilter.h" |
| |
| static void draw_masked_image(SkCanvas* canvas, const SkImage* image, SkScalar x, SkScalar y, |
| const SkImage* mask) { |
| SkMatrix matrix = SkMatrix::MakeScale(SkIntToScalar(image->width()) / mask->width(), |
| SkIntToScalar(image->height() / mask->height())); |
| SkPaint paint; |
| paint.setMaskFilter(SkShaderMaskFilter::Make(mask->makeShader(&matrix))); |
| canvas->drawImage(image, x, y, &paint); |
| } |
| |
| #include "SkGradientShader.h" |
| static sk_sp<SkShader> make_shader(const SkRect& r) { |
| const SkPoint pts[] = { |
| { r.fLeft, r.fTop }, { r.fRight, r.fBottom }, |
| }; |
| const SkColor colors[] = { 0, SK_ColorWHITE }; |
| return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kRepeat_TileMode); |
| } |
| |
| DEF_SIMPLE_GM(shadermaskfilter_gradient, canvas, 512, 512) { |
| SkRect r = { 0, 0, 100, 150 }; |
| auto shader = make_shader(r); |
| auto mf = SkShaderMaskFilter::Make(shader); |
| |
| canvas->translate(20, 20); |
| canvas->scale(2, 2); |
| |
| SkPaint paint; |
| paint.setMaskFilter(mf); |
| paint.setColor(SK_ColorRED); |
| canvas->drawOval(r, paint); |
| } |
| |
| #include "Resources.h" |
| DEF_SIMPLE_GM(shadermaskfilter_image, canvas, 512, 512) { |
| canvas->scale(1.25f, 1.25f); |
| |
| auto image = GetResourceAsImage("images/mandrill_128.png"); |
| auto mask = GetResourceAsImage("images/color_wheel.png"); |
| |
| canvas->drawImage(image, 10, 10, nullptr); |
| canvas->drawImage(mask, 10 + image->width() + 10.f, 10, nullptr); |
| |
| draw_masked_image(canvas, image.get(), 10, 10 + image->height() + 10.f, mask.get()); |
| } |