diff options
Diffstat (limited to 'tests/ShaderOpacityTest.cpp')
-rw-r--r-- | tests/ShaderOpacityTest.cpp | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/tests/ShaderOpacityTest.cpp b/tests/ShaderOpacityTest.cpp new file mode 100644 index 0000000000..a8177eeb8b --- /dev/null +++ b/tests/ShaderOpacityTest.cpp @@ -0,0 +1,119 @@ + +/* + * 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 "Test.h" +#include "SkShader.h" +#include "SkGradientShader.h" +#include "SkColorShader.h" + +static void test_bitmap(skiatest::Reporter* reporter) { + SkBitmap bmp; + bmp.setConfig(SkBitmap::kARGB_8888_Config, 2, 2); + + // test 1: bitmap without pixel data + SkShader* shader = SkShader::CreateBitmapShader(bmp, + SkShader::kClamp_TileMode, SkShader::kClamp_TileMode); + REPORTER_ASSERT(reporter, shader); + REPORTER_ASSERT(reporter, !shader->isOpaque()); + shader->unref(); + + // From this point on, we have pixels + bmp.allocPixels(); + + // test 2: not opaque by default + shader = SkShader::CreateBitmapShader(bmp, + SkShader::kClamp_TileMode, SkShader::kClamp_TileMode); + REPORTER_ASSERT(reporter, shader); + REPORTER_ASSERT(reporter, !shader->isOpaque()); + shader->unref(); + + // test 3: explicitly opaque + bmp.setIsOpaque(true); + shader = SkShader::CreateBitmapShader(bmp, + SkShader::kClamp_TileMode, SkShader::kClamp_TileMode); + REPORTER_ASSERT(reporter, shader); + REPORTER_ASSERT(reporter, shader->isOpaque()); + shader->unref(); + + // test 4: explicitly not opaque + bmp.setIsOpaque(false); + shader = SkShader::CreateBitmapShader(bmp, + SkShader::kClamp_TileMode, SkShader::kClamp_TileMode); + REPORTER_ASSERT(reporter, shader); + REPORTER_ASSERT(reporter, !shader->isOpaque()); + shader->unref(); + +} + +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; + SkShader::TileMode mode = SkShader::kClamp_TileMode; + + // test 1: all opaque + colors[0] = SkColorSetARGB(0xFF, 0, 0, 0); + colors[1] = SkColorSetARGB(0xFF, 0, 0, 0); + SkShader* grad = SkGradientShader::CreateLinear(pts, colors, pos, count, + mode); + REPORTER_ASSERT(reporter, grad); + REPORTER_ASSERT(reporter, grad->isOpaque()); + grad->unref(); + + // test 2: all 0 alpha + colors[0] = SkColorSetARGB(0, 0, 0, 0); + colors[1] = SkColorSetARGB(0, 0, 0, 0); + grad = SkGradientShader::CreateLinear(pts, colors, pos, count, mode); + REPORTER_ASSERT(reporter, grad); + REPORTER_ASSERT(reporter, !grad->isOpaque()); + grad->unref(); + + // test 3: one opaque, one transparent + colors[0] = SkColorSetARGB(0xFF, 0, 0, 0); + colors[1] = SkColorSetARGB(0x40, 0, 0, 0); + grad = SkGradientShader::CreateLinear(pts, colors, pos, count, mode); + REPORTER_ASSERT(reporter, grad); + REPORTER_ASSERT(reporter, !grad->isOpaque()); + grad->unref(); + + // test 4: test 3, swapped + colors[0] = SkColorSetARGB(0x40, 0, 0, 0); + colors[1] = SkColorSetARGB(0xFF, 0, 0, 0); + grad = SkGradientShader::CreateLinear(pts, colors, pos, count, mode); + REPORTER_ASSERT(reporter, grad); + REPORTER_ASSERT(reporter, !grad->isOpaque()); + grad->unref(); +} + +static void test_color(skiatest::Reporter* reporter) +{ + SkColorShader colorShader1(SkColorSetARGB(0,0,0,0)); + REPORTER_ASSERT(reporter, !colorShader1.isOpaque()); + SkColorShader colorShader2(SkColorSetARGB(0xFF,0,0,0)); + REPORTER_ASSERT(reporter, colorShader2.isOpaque()); + SkColorShader colorShader3(SkColorSetARGB(0x7F,0,0,0)); + REPORTER_ASSERT(reporter, !colorShader3.isOpaque()); + + // with inherrited color, shader must declare itself as opaque, + // since lack of opacity will depend solely on the paint + SkColorShader colorShader4; + REPORTER_ASSERT(reporter, colorShader4.isOpaque()); +} + +static void test_shader_opacity(skiatest::Reporter* reporter) +{ + test_gradient(reporter); + test_color(reporter); + test_bitmap(reporter); +} + +#include "TestClassDef.h" +DEFINE_TESTCLASS("ShaderOpacity", ShaderOpacityTestClass, test_shader_opacity) |