1 /* Apache License, Version 2.0 */
2
3 #include "testing/testing.h"
4
5 #include "BLI_math.h"
6
TEST(math_color,RGBToHSVRoundtrip)7 TEST(math_color, RGBToHSVRoundtrip)
8 {
9 float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
10 float hsv[3], rgb[3];
11 rgb_to_hsv_v(orig_rgb, hsv);
12 hsv_to_rgb_v(hsv, rgb);
13 EXPECT_V3_NEAR(orig_rgb, rgb, 1e-5);
14 }
15
TEST(math_color,RGBToHSLRoundtrip)16 TEST(math_color, RGBToHSLRoundtrip)
17 {
18 float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
19 float hsl[3], rgb[3];
20 rgb_to_hsl_v(orig_rgb, hsl);
21 hsl_to_rgb_v(hsl, rgb);
22 EXPECT_V3_NEAR(orig_rgb, rgb, 1e-5);
23 }
24
TEST(math_color,RGBToYUVRoundtrip)25 TEST(math_color, RGBToYUVRoundtrip)
26 {
27 float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
28 float yuv[3], rgb[3];
29 rgb_to_yuv(orig_rgb[0], orig_rgb[1], orig_rgb[2], &yuv[0], &yuv[1], &yuv[2], BLI_YUV_ITU_BT709);
30 yuv_to_rgb(yuv[0], yuv[1], yuv[2], &rgb[0], &rgb[1], &rgb[2], BLI_YUV_ITU_BT709);
31 EXPECT_V3_NEAR(orig_rgb, rgb, 1e-4);
32 }
33
TEST(math_color,RGBToYCCRoundtrip)34 TEST(math_color, RGBToYCCRoundtrip)
35 {
36 float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
37 float ycc[3], rgb[3];
38
39 rgb_to_ycc(orig_rgb[0], orig_rgb[1], orig_rgb[2], &ycc[0], &ycc[1], &ycc[2], BLI_YCC_ITU_BT601);
40 ycc_to_rgb(ycc[0], ycc[1], ycc[2], &rgb[0], &rgb[1], &rgb[2], BLI_YCC_ITU_BT601);
41 EXPECT_V3_NEAR(orig_rgb, rgb, 1e-3);
42
43 rgb_to_ycc(orig_rgb[0], orig_rgb[1], orig_rgb[2], &ycc[0], &ycc[1], &ycc[2], BLI_YCC_ITU_BT709);
44 ycc_to_rgb(ycc[0], ycc[1], ycc[2], &rgb[0], &rgb[1], &rgb[2], BLI_YCC_ITU_BT709);
45 EXPECT_V3_NEAR(orig_rgb, rgb, 1e-3);
46
47 rgb_to_ycc(orig_rgb[0], orig_rgb[1], orig_rgb[2], &ycc[0], &ycc[1], &ycc[2], BLI_YCC_JFIF_0_255);
48 ycc_to_rgb(ycc[0], ycc[1], ycc[2], &rgb[0], &rgb[1], &rgb[2], BLI_YCC_JFIF_0_255);
49 EXPECT_V3_NEAR(orig_rgb, rgb, 1e-3);
50 }
51
TEST(math_color,LinearRGBTosRGBNearZero)52 TEST(math_color, LinearRGBTosRGBNearZero)
53 {
54 float linear_color = 0.002f;
55 float srgb_color = linearrgb_to_srgb(linear_color);
56 EXPECT_NEAR(0.02584f, srgb_color, 1e-5);
57 }
58
TEST(math_color,LinearRGBTosRGB)59 TEST(math_color, LinearRGBTosRGB)
60 {
61 float linear_color = 0.75f;
62 float srgb_color = linearrgb_to_srgb(linear_color);
63 EXPECT_NEAR(0.880824f, srgb_color, 1e-5);
64 }
65
TEST(math_color,LinearRGBTosRGBRoundtrip)66 TEST(math_color, LinearRGBTosRGBRoundtrip)
67 {
68 const int N = 50;
69 int i;
70 for (i = 0; i < N; ++i) {
71 float orig_linear_color = (float)i / N;
72 float srgb_color = linearrgb_to_srgb(orig_linear_color);
73 float linear_color = srgb_to_linearrgb(srgb_color);
74 EXPECT_NEAR(orig_linear_color, linear_color, 1e-5);
75 }
76 }
77