1 //
2 // Copyright 2018 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6
7 // FogTest.cpp: Tests basic usage of glFog.
8
9 #include "test_utils/ANGLETest.h"
10 #include "test_utils/gl_raii.h"
11
12 #include "util/random_utils.h"
13
14 #include <stdint.h>
15
16 using namespace angle;
17
18 class FogTest : public ANGLETest
19 {
20 protected:
FogTest()21 FogTest()
22 {
23 setWindowWidth(32);
24 setWindowHeight(32);
25 setConfigRedBits(8);
26 setConfigGreenBits(8);
27 setConfigBlueBits(8);
28 setConfigAlphaBits(8);
29 setConfigDepthBits(24);
30 }
31 };
32
33 // Initial state check.
TEST_P(FogTest,InitialState)34 TEST_P(FogTest, InitialState)
35 {
36 EXPECT_GL_FALSE(glIsEnabled(GL_FOG));
37 EXPECT_GL_NO_ERROR();
38
39 GLint fogMode;
40 glGetIntegerv(GL_FOG_MODE, &fogMode);
41 EXPECT_GL_NO_ERROR();
42 EXPECT_GLENUM_EQ(GL_EXP, fogMode);
43
44 GLfloat fogModeAsFloat;
45 glGetFloatv(GL_FOG_MODE, &fogModeAsFloat);
46 EXPECT_GL_NO_ERROR();
47 EXPECT_GLENUM_EQ(GL_EXP, fogModeAsFloat);
48
49 GLfloat fogStart;
50 GLfloat fogEnd;
51 GLfloat fogDensity;
52
53 glGetFloatv(GL_FOG_START, &fogStart);
54 EXPECT_GL_NO_ERROR();
55 glGetFloatv(GL_FOG_END, &fogEnd);
56 EXPECT_GL_NO_ERROR();
57 glGetFloatv(GL_FOG_DENSITY, &fogDensity);
58 EXPECT_GL_NO_ERROR();
59
60 EXPECT_EQ(0.0f, fogStart);
61 EXPECT_EQ(1.0f, fogEnd);
62 EXPECT_EQ(1.0f, fogDensity);
63
64 const GLColor32F kInitialFogColor(0.0f, 0.0f, 0.0f, 0.0f);
65 GLColor32F initialFogColor;
66 glGetFloatv(GL_FOG_COLOR, &initialFogColor.R);
67 EXPECT_GL_NO_ERROR();
68
69 EXPECT_EQ(kInitialFogColor, initialFogColor);
70 }
71
72 // Negative test for parameter names.
TEST_P(FogTest,NegativeParameter)73 TEST_P(FogTest, NegativeParameter)
74 {
75 glFogfv(0, nullptr);
76 EXPECT_GL_ERROR(GL_INVALID_ENUM);
77 }
78
79 // Negative test for parameter values.
TEST_P(FogTest,NegativeValues)80 TEST_P(FogTest, NegativeValues)
81 {
82 glFogf(GL_FOG_MODE, 0.0f);
83 EXPECT_GL_ERROR(GL_INVALID_VALUE);
84
85 glFogf(GL_FOG_DENSITY, -1.0f);
86 EXPECT_GL_ERROR(GL_INVALID_VALUE);
87 }
88
89 // Checks that fog state can be set.
TEST_P(FogTest,Set)90 TEST_P(FogTest, Set)
91 {
92 GLfloat fogValue[4] = {};
93
94 glFogf(GL_FOG_MODE, GL_EXP2);
95 EXPECT_GL_NO_ERROR();
96
97 glGetFloatv(GL_FOG_MODE, fogValue);
98 EXPECT_GL_NO_ERROR();
99 EXPECT_GLENUM_EQ(GL_EXP2, fogValue[0]);
100
101 glFogf(GL_FOG_DENSITY, 2.0f);
102 EXPECT_GL_NO_ERROR();
103
104 glGetFloatv(GL_FOG_DENSITY, fogValue);
105 EXPECT_GL_NO_ERROR();
106 EXPECT_GLENUM_EQ(2.0f, fogValue[0]);
107
108 glFogf(GL_FOG_START, 2.0f);
109 EXPECT_GL_NO_ERROR();
110
111 glGetFloatv(GL_FOG_START, fogValue);
112 EXPECT_GL_NO_ERROR();
113 EXPECT_GLENUM_EQ(2.0f, fogValue[0]);
114
115 glFogf(GL_FOG_END, 2.0f);
116 EXPECT_GL_NO_ERROR();
117
118 glGetFloatv(GL_FOG_END, fogValue);
119 EXPECT_GL_NO_ERROR();
120 EXPECT_GLENUM_EQ(2.0f, fogValue[0]);
121
122 const GLColor32F testColor(0.1f, 0.2f, 0.3f, 0.4f);
123 glFogfv(GL_FOG_COLOR, &testColor.R);
124 EXPECT_GL_NO_ERROR();
125 glGetFloatv(GL_FOG_COLOR, fogValue);
126 EXPECT_GL_NO_ERROR();
127 EXPECT_EQ(0.1f, fogValue[0]);
128 EXPECT_EQ(0.2f, fogValue[1]);
129 EXPECT_EQ(0.3f, fogValue[2]);
130 EXPECT_EQ(0.4f, fogValue[3]);
131 }
132
133 ANGLE_INSTANTIATE_TEST_ES1(FogTest);
134