| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkAlphaType.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkSamplingOptions.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "tests/Test.h" |
| |
| static void test_bitmap(skiatest::Reporter* reporter) { |
| SkImageInfo info = SkImageInfo::MakeN32Premul(2, 2); |
| |
| SkBitmap bmp; |
| bmp.setInfo(info); |
| |
| // test 1: bitmap without pixel data |
| auto shader = bmp.makeShader(SkSamplingOptions()); |
| REPORTER_ASSERT(reporter, shader); |
| REPORTER_ASSERT(reporter, !shader->isOpaque()); |
| |
| // From this point on, we have pixels |
| bmp.allocPixels(info); |
| |
| // test 2: not opaque by default |
| shader = bmp.makeShader(SkSamplingOptions()); |
| REPORTER_ASSERT(reporter, shader); |
| REPORTER_ASSERT(reporter, !shader->isOpaque()); |
| |
| // test 3: explicitly opaque |
| bmp.setAlphaType(kOpaque_SkAlphaType); |
| shader = bmp.makeShader(SkSamplingOptions()); |
| REPORTER_ASSERT(reporter, shader); |
| REPORTER_ASSERT(reporter, shader->isOpaque()); |
| |
| // test 4: explicitly not opaque |
| bmp.setAlphaType(kPremul_SkAlphaType); |
| shader = bmp.makeShader(SkSamplingOptions()); |
| REPORTER_ASSERT(reporter, shader); |
| REPORTER_ASSERT(reporter, !shader->isOpaque()); |
| } |
| |
| static void test_gradient(skiatest::Reporter* reporter) { |
| SkPoint pts[2]; |
| pts[0].iset(0, 0); |
| pts[1].iset(1, 0); |
| SkColor colors[2]; |
| SkScalar pos[2] = {SkIntToScalar(0), SkIntToScalar(1)}; |
| int count = 2; |
| SkTileMode mode = SkTileMode::kClamp; |
| |
| // test 1: all opaque |
| colors[0] = SkColorSetARGB(0xFF, 0, 0, 0); |
| colors[1] = SkColorSetARGB(0xFF, 0, 0, 0); |
| auto grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode); |
| REPORTER_ASSERT(reporter, grad); |
| REPORTER_ASSERT(reporter, grad->isOpaque()); |
| |
| // test 2: all 0 alpha |
| colors[0] = SkColorSetARGB(0, 0, 0, 0); |
| colors[1] = SkColorSetARGB(0, 0, 0, 0); |
| grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode); |
| REPORTER_ASSERT(reporter, grad); |
| REPORTER_ASSERT(reporter, !grad->isOpaque()); |
| |
| // test 3: one opaque, one transparent |
| colors[0] = SkColorSetARGB(0xFF, 0, 0, 0); |
| colors[1] = SkColorSetARGB(0x40, 0, 0, 0); |
| grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode); |
| REPORTER_ASSERT(reporter, grad); |
| REPORTER_ASSERT(reporter, !grad->isOpaque()); |
| |
| // test 4: test 3, swapped |
| colors[0] = SkColorSetARGB(0x40, 0, 0, 0); |
| colors[1] = SkColorSetARGB(0xFF, 0, 0, 0); |
| grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode); |
| REPORTER_ASSERT(reporter, grad); |
| REPORTER_ASSERT(reporter, !grad->isOpaque()); |
| } |
| |
| static void test_color(skiatest::Reporter* reporter) { |
| sk_sp<SkShader> colorShader1 = SkShaders::Color(SkColorSetARGB(0,0,0,0)); |
| REPORTER_ASSERT(reporter, !colorShader1->isOpaque()); |
| sk_sp<SkShader> colorShader2 = SkShaders::Color(SkColorSetARGB(0xFF,0,0,0)); |
| REPORTER_ASSERT(reporter, colorShader2->isOpaque()); |
| sk_sp<SkShader> colorShader3 = SkShaders::Color(SkColorSetARGB(0x7F,0,0,0)); |
| REPORTER_ASSERT(reporter, !colorShader3->isOpaque()); |
| } |
| |
| DEF_TEST(ShaderOpacity, reporter) { |
| test_gradient(reporter); |
| test_color(reporter); |
| test_bitmap(reporter); |
| } |