junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2011 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
tfarina@chromium.org | e4fafb1 | 2013-12-12 21:11:12 +0000 | [diff] [blame] | 7 | |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 8 | #include "include/core/SkBitmap.h" |
Mike Reed | 9290d01 | 2020-06-11 16:56:06 -0400 | [diff] [blame] | 9 | #include "include/core/SkCanvas.h" |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 10 | #include "include/core/SkShader.h" |
Mike Reed | 9290d01 | 2020-06-11 16:56:06 -0400 | [diff] [blame] | 11 | #include "include/core/SkSurface.h" |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 12 | #include "include/effects/SkGradientShader.h" |
| 13 | #include "src/shaders/SkColorShader.h" |
| 14 | #include "tests/Test.h" |
Mike Reed | 9290d01 | 2020-06-11 16:56:06 -0400 | [diff] [blame] | 15 | #include "tools/ToolUtils.h" |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 16 | |
| 17 | static void test_bitmap(skiatest::Reporter* reporter) { |
mike@reedtribe.org | deee496 | 2014-02-13 14:41:43 +0000 | [diff] [blame] | 18 | SkImageInfo info = SkImageInfo::MakeN32Premul(2, 2); |
| 19 | |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 20 | SkBitmap bmp; |
commit-bot@chromium.org | a3264e5 | 2014-05-30 13:26:10 +0000 | [diff] [blame] | 21 | bmp.setInfo(info); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 22 | |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 23 | // test 1: bitmap without pixel data |
Mike Reed | 50acf8f | 2019-04-08 13:20:23 -0400 | [diff] [blame] | 24 | auto shader = bmp.makeShader(SkTileMode::kClamp, SkTileMode::kClamp); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 25 | REPORTER_ASSERT(reporter, shader); |
| 26 | REPORTER_ASSERT(reporter, !shader->isOpaque()); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 27 | |
| 28 | // From this point on, we have pixels |
mike@reedtribe.org | deee496 | 2014-02-13 14:41:43 +0000 | [diff] [blame] | 29 | bmp.allocPixels(info); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 30 | |
| 31 | // test 2: not opaque by default |
Mike Reed | 50acf8f | 2019-04-08 13:20:23 -0400 | [diff] [blame] | 32 | shader = bmp.makeShader(); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 33 | REPORTER_ASSERT(reporter, shader); |
| 34 | REPORTER_ASSERT(reporter, !shader->isOpaque()); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 35 | |
| 36 | // test 3: explicitly opaque |
reed@google.com | 383a697 | 2013-10-21 14:00:07 +0000 | [diff] [blame] | 37 | bmp.setAlphaType(kOpaque_SkAlphaType); |
Mike Reed | 50acf8f | 2019-04-08 13:20:23 -0400 | [diff] [blame] | 38 | shader = bmp.makeShader(); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 39 | REPORTER_ASSERT(reporter, shader); |
| 40 | REPORTER_ASSERT(reporter, shader->isOpaque()); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 41 | |
| 42 | // test 4: explicitly not opaque |
reed@google.com | 383a697 | 2013-10-21 14:00:07 +0000 | [diff] [blame] | 43 | bmp.setAlphaType(kPremul_SkAlphaType); |
Mike Reed | 50acf8f | 2019-04-08 13:20:23 -0400 | [diff] [blame] | 44 | shader = bmp.makeShader(); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 45 | REPORTER_ASSERT(reporter, shader); |
| 46 | REPORTER_ASSERT(reporter, !shader->isOpaque()); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 47 | } |
| 48 | |
reed | 1a9b964 | 2016-03-13 14:13:58 -0700 | [diff] [blame] | 49 | static void test_gradient(skiatest::Reporter* reporter) { |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 50 | SkPoint pts[2]; |
| 51 | pts[0].iset(0, 0); |
| 52 | pts[1].iset(1, 0); |
| 53 | SkColor colors[2]; |
| 54 | SkScalar pos[2] = {SkIntToScalar(0), SkIntToScalar(1)}; |
| 55 | int count = 2; |
Mike Reed | fae8fce | 2019-04-03 10:27:45 -0400 | [diff] [blame] | 56 | SkTileMode mode = SkTileMode::kClamp; |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 57 | |
| 58 | // test 1: all opaque |
| 59 | colors[0] = SkColorSetARGB(0xFF, 0, 0, 0); |
| 60 | colors[1] = SkColorSetARGB(0xFF, 0, 0, 0); |
reed | 1a9b964 | 2016-03-13 14:13:58 -0700 | [diff] [blame] | 61 | auto grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 62 | REPORTER_ASSERT(reporter, grad); |
| 63 | REPORTER_ASSERT(reporter, grad->isOpaque()); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 64 | |
| 65 | // test 2: all 0 alpha |
| 66 | colors[0] = SkColorSetARGB(0, 0, 0, 0); |
| 67 | colors[1] = SkColorSetARGB(0, 0, 0, 0); |
reed | 1a9b964 | 2016-03-13 14:13:58 -0700 | [diff] [blame] | 68 | grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 69 | REPORTER_ASSERT(reporter, grad); |
| 70 | REPORTER_ASSERT(reporter, !grad->isOpaque()); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 71 | |
| 72 | // test 3: one opaque, one transparent |
| 73 | colors[0] = SkColorSetARGB(0xFF, 0, 0, 0); |
| 74 | colors[1] = SkColorSetARGB(0x40, 0, 0, 0); |
reed | 1a9b964 | 2016-03-13 14:13:58 -0700 | [diff] [blame] | 75 | grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 76 | REPORTER_ASSERT(reporter, grad); |
| 77 | REPORTER_ASSERT(reporter, !grad->isOpaque()); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 78 | |
| 79 | // test 4: test 3, swapped |
| 80 | colors[0] = SkColorSetARGB(0x40, 0, 0, 0); |
| 81 | colors[1] = SkColorSetARGB(0xFF, 0, 0, 0); |
reed | 1a9b964 | 2016-03-13 14:13:58 -0700 | [diff] [blame] | 82 | grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 83 | REPORTER_ASSERT(reporter, grad); |
| 84 | REPORTER_ASSERT(reporter, !grad->isOpaque()); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 85 | } |
| 86 | |
reed | 1a9b964 | 2016-03-13 14:13:58 -0700 | [diff] [blame] | 87 | static void test_color(skiatest::Reporter* reporter) { |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 88 | SkColorShader colorShader1(SkColorSetARGB(0,0,0,0)); |
| 89 | REPORTER_ASSERT(reporter, !colorShader1.isOpaque()); |
| 90 | SkColorShader colorShader2(SkColorSetARGB(0xFF,0,0,0)); |
| 91 | REPORTER_ASSERT(reporter, colorShader2.isOpaque()); |
| 92 | SkColorShader colorShader3(SkColorSetARGB(0x7F,0,0,0)); |
| 93 | REPORTER_ASSERT(reporter, !colorShader3.isOpaque()); |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 94 | } |
| 95 | |
tfarina@chromium.org | e4fafb1 | 2013-12-12 21:11:12 +0000 | [diff] [blame] | 96 | DEF_TEST(ShaderOpacity, reporter) { |
junov@chromium.org | b6e1619 | 2011-12-09 15:48:03 +0000 | [diff] [blame] | 97 | test_gradient(reporter); |
| 98 | test_color(reporter); |
| 99 | test_bitmap(reporter); |
| 100 | } |
Mike Reed | 9290d01 | 2020-06-11 16:56:06 -0400 | [diff] [blame] | 101 | |
| 102 | DEF_TEST(image_shader_filtering, reporter) { |
| 103 | auto make_checker_img = [](int w, int h) { |
| 104 | auto info = SkImageInfo::Make(w, h, kRGBA_8888_SkColorType, kOpaque_SkAlphaType); |
| 105 | auto surf = SkSurface::MakeRaster(info); |
| 106 | ToolUtils::draw_checkerboard(surf->getCanvas(), SK_ColorRED, SK_ColorBLUE, 2); |
| 107 | return surf->makeImageSnapshot(); |
| 108 | }; |
| 109 | |
| 110 | auto img = make_checker_img(4, 4); |
| 111 | |
| 112 | const SkFilterQuality quals[] = { |
| 113 | kNone_SkFilterQuality, |
| 114 | kLow_SkFilterQuality, |
| 115 | kMedium_SkFilterQuality, |
| 116 | kHigh_SkFilterQuality, |
| 117 | }; |
| 118 | const SkScalar scales[] = { 3.0f, 1.0f, 0.5f, 0.25f, 0.125f }; |
| 119 | |
| 120 | auto make_img = [&](const SkPaint& paint) { |
| 121 | auto info = SkImageInfo::Make(70, 70, kRGBA_8888_SkColorType, kPremul_SkAlphaType); |
| 122 | auto surf = SkSurface::MakeRaster(info); |
| 123 | auto canvas = surf->getCanvas(); |
| 124 | canvas->scale(1.06f, 1.06f); // nicely exaggerates noise when not filtering |
| 125 | canvas->drawRect({0, 0, 64, 64}, paint); |
| 126 | return surf->makeImageSnapshot(); |
| 127 | }; |
| 128 | |
| 129 | SkPaint paint; |
| 130 | for (auto q : quals) { |
| 131 | for (auto scale : scales) { |
| 132 | SkMatrix m = SkMatrix::Scale(scale, scale); |
| 133 | paint.setFilterQuality(kNone_SkFilterQuality); // this setting should be ignored |
| 134 | paint.setShader(img->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, &m, q)); |
| 135 | auto img0 = make_img(paint); |
| 136 | |
| 137 | paint.setFilterQuality(q); // this should (still) be ignored |
| 138 | auto img1 = make_img(paint); |
| 139 | |
| 140 | // make legacy form of shader, relying on the paint's filter-quality (q) |
| 141 | paint.setShader(img->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, &m)); |
| 142 | auto img2 = make_img(paint); |
| 143 | |
| 144 | REPORTER_ASSERT(reporter, ToolUtils::equal_pixels(img0.get(), img1.get())); |
| 145 | REPORTER_ASSERT(reporter, ToolUtils::equal_pixels(img0.get(), img2.get())); |
| 146 | } |
| 147 | } |
| 148 | } |