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 */ 7 8 #include "Test.h" 9 #include "TestClassDef.h" 10 #include "SkShader.h" 11 #include "SkGradientShader.h" 12 #include "SkColorShader.h" 13 14 static void test_bitmap(skiatest::Reporter* reporter) { 15 SkBitmap bmp; 16 bmp.setConfig(SkBitmap::kARGB_8888_Config, 2, 2); 17 18 // test 1: bitmap without pixel data 19 SkShader* shader = SkShader::CreateBitmapShader(bmp, 20 SkShader::kClamp_TileMode, SkShader::kClamp_TileMode); 21 REPORTER_ASSERT(reporter, shader); 22 REPORTER_ASSERT(reporter, !shader->isOpaque()); 23 shader->unref(); 24 25 // From this point on, we have pixels 26 bmp.allocPixels(); 27 28 // test 2: not opaque by default 29 shader = SkShader::CreateBitmapShader(bmp, 30 SkShader::kClamp_TileMode, SkShader::kClamp_TileMode); 31 REPORTER_ASSERT(reporter, shader); 32 REPORTER_ASSERT(reporter, !shader->isOpaque()); 33 shader->unref(); 34 35 // test 3: explicitly opaque 36 bmp.setAlphaType(kOpaque_SkAlphaType); 37 shader = SkShader::CreateBitmapShader(bmp, 38 SkShader::kClamp_TileMode, SkShader::kClamp_TileMode); 39 REPORTER_ASSERT(reporter, shader); 40 REPORTER_ASSERT(reporter, shader->isOpaque()); 41 shader->unref(); 42 43 // test 4: explicitly not opaque 44 bmp.setAlphaType(kPremul_SkAlphaType); 45 shader = SkShader::CreateBitmapShader(bmp, 46 SkShader::kClamp_TileMode, SkShader::kClamp_TileMode); 47 REPORTER_ASSERT(reporter, shader); 48 REPORTER_ASSERT(reporter, !shader->isOpaque()); 49 shader->unref(); 50 51 } 52 53 static void test_gradient(skiatest::Reporter* reporter) 54 { 55 SkPoint pts[2]; 56 pts[0].iset(0, 0); 57 pts[1].iset(1, 0); 58 SkColor colors[2]; 59 SkScalar pos[2] = {SkIntToScalar(0), SkIntToScalar(1)}; 60 int count = 2; 61 SkShader::TileMode mode = SkShader::kClamp_TileMode; 62 63 // test 1: all opaque 64 colors[0] = SkColorSetARGB(0xFF, 0, 0, 0); 65 colors[1] = SkColorSetARGB(0xFF, 0, 0, 0); 66 SkShader* grad = SkGradientShader::CreateLinear(pts, colors, pos, count, 67 mode); 68 REPORTER_ASSERT(reporter, grad); 69 REPORTER_ASSERT(reporter, grad->isOpaque()); 70 grad->unref(); 71 72 // test 2: all 0 alpha 73 colors[0] = SkColorSetARGB(0, 0, 0, 0); 74 colors[1] = SkColorSetARGB(0, 0, 0, 0); 75 grad = SkGradientShader::CreateLinear(pts, colors, pos, count, mode); 76 REPORTER_ASSERT(reporter, grad); 77 REPORTER_ASSERT(reporter, !grad->isOpaque()); 78 grad->unref(); 79 80 // test 3: one opaque, one transparent 81 colors[0] = SkColorSetARGB(0xFF, 0, 0, 0); 82 colors[1] = SkColorSetARGB(0x40, 0, 0, 0); 83 grad = SkGradientShader::CreateLinear(pts, colors, pos, count, mode); 84 REPORTER_ASSERT(reporter, grad); 85 REPORTER_ASSERT(reporter, !grad->isOpaque()); 86 grad->unref(); 87 88 // test 4: test 3, swapped 89 colors[0] = SkColorSetARGB(0x40, 0, 0, 0); 90 colors[1] = SkColorSetARGB(0xFF, 0, 0, 0); 91 grad = SkGradientShader::CreateLinear(pts, colors, pos, count, mode); 92 REPORTER_ASSERT(reporter, grad); 93 REPORTER_ASSERT(reporter, !grad->isOpaque()); 94 grad->unref(); 95 } 96 97 static void test_color(skiatest::Reporter* reporter) 98 { 99 SkColorShader colorShader1(SkColorSetARGB(0,0,0,0)); 100 REPORTER_ASSERT(reporter, !colorShader1.isOpaque()); 101 SkColorShader colorShader2(SkColorSetARGB(0xFF,0,0,0)); 102 REPORTER_ASSERT(reporter, colorShader2.isOpaque()); 103 SkColorShader colorShader3(SkColorSetARGB(0x7F,0,0,0)); 104 REPORTER_ASSERT(reporter, !colorShader3.isOpaque()); 105 106 // with inherrited color, shader must declare itself as opaque, 107 // since lack of opacity will depend solely on the paint 108 SkColorShader colorShader4; 109 REPORTER_ASSERT(reporter, colorShader4.isOpaque()); 110 } 111 112 DEF_TEST(ShaderOpacity, reporter) { 113 test_gradient(reporter); 114 test_color(reporter); 115 test_bitmap(reporter); 116 } 117
