/* * Copyright 2017 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/SkBlurTypes.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkColorFilter.h" #include "include/core/SkImage.h" #include "include/core/SkImageInfo.h" #include "include/core/SkMaskFilter.h" #include "include/core/SkPaint.h" #include "include/core/SkRefCnt.h" #include "include/core/SkShader.h" static SkBitmap make_alpha_image(int w, int h) { SkBitmap bm; bm.allocPixels(SkImageInfo::MakeA8(w, h)); bm.eraseARGB(10, 0, 0 , 0); for (int y = 0; y < bm.height(); ++y) { for (int x = y; x < bm.width(); ++x) { *bm.getAddr8(x, y) = 0xFF; } } bm.setImmutable(); return bm; } static sk_sp make_color_filter() { float colorMatrix[20] = { 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0.5, 0.5, 0, 0, 0, 0.5, 0.5, 0}; // mix G and A. return SkColorFilters::Matrix(colorMatrix); } DEF_SIMPLE_GM(alpha_image, canvas, 256, 256) { auto image = SkImage::MakeFromBitmap(make_alpha_image(96, 96)); SkPaint paint; paint.setColorFilter(make_color_filter()); paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 10.0f)); canvas->drawImage(image.get(), 16, 16, &paint); paint.setColorFilter(nullptr); paint.setShader(SkShaders::Color(SK_ColorCYAN)); canvas->drawImage(image.get(), 144, 16, &paint); paint.setColorFilter(make_color_filter()); canvas->drawImage(image.get(), 16, 144, &paint); paint.setMaskFilter(nullptr); canvas->drawImage(image.get(), 144, 144, &paint); } // Created to demonstrate skbug.com/10556 - GPU backend was failing to apply paint alpha to // alpha-only image shaders. The two boxes should look the same. DEF_SIMPLE_GM(alpha_image_alpha_tint, canvas, 152, 80) { canvas->clear(SK_ColorGRAY); SkBitmap bm; bm.allocPixels(SkImageInfo::MakeA8(64, 64)); for (int y = 0; y < bm.height(); ++y) { for (int x = 0; x < bm.width(); ++x) { *bm.getAddr8(x, y) = y * 4; } } bm.setImmutable(); auto image = SkImage::MakeFromBitmap(bm); SkPaint paint; paint.setColor4f({ 0, 1, 0, 0.5f }); canvas->translate(8, 8); canvas->drawImage(image.get(), 0, 0, &paint); canvas->translate(72, 0); paint.setShader(image->makeShader(SkSamplingOptions())); canvas->drawRect({ 0, 0, 64, 64 }, paint); }