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/* Apache License, Version 2.0 */
#include "testing/testing.h"
#include "BLI_math.h"
TEST(mathutils, RGBToHSVRoundtrip)
{
float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
float hsv[3], rgb[3];
rgb_to_hsv_v(orig_rgb, hsv);
hsv_to_rgb_v(hsv, rgb);
EXPECT_V3_NEAR(orig_rgb, rgb, 1e-5);
}
TEST(mathutils, RGBToHSLRoundtrip)
{
float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
float hsl[3], rgb[3];
rgb_to_hsl_v(orig_rgb, hsl);
hsl_to_rgb_v(hsl, rgb);
EXPECT_V3_NEAR(orig_rgb, rgb, 1e-5);
}
TEST(mathutils, RGBToYUVRoundtrip)
{
float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
float yuv[3], rgb[3];
rgb_to_yuv(orig_rgb[0], orig_rgb[1], orig_rgb[2],
&yuv[0], &yuv[1], &yuv[2]);
yuv_to_rgb(yuv[0], yuv[1], yuv[2],
&rgb[0], &rgb[1], &rgb[2]);
EXPECT_V3_NEAR(orig_rgb, rgb, 1e-4);
}
TEST(mathutils, RGBToYCCRoundtrip)
{
float orig_rgb[3] = {0.1f, 0.2f, 0.3f};
float ycc[3], rgb[3];
rgb_to_ycc(orig_rgb[0], orig_rgb[1], orig_rgb[2],
&ycc[0], &ycc[1], &ycc[2],
BLI_YCC_ITU_BT601);
ycc_to_rgb(ycc[0], ycc[1], ycc[2],
&rgb[0], &rgb[1], &rgb[2],
BLI_YCC_ITU_BT601);
EXPECT_V3_NEAR(orig_rgb, rgb, 1e-3);
rgb_to_ycc(orig_rgb[0], orig_rgb[1], orig_rgb[2],
&ycc[0], &ycc[1], &ycc[2],
BLI_YCC_ITU_BT709);
ycc_to_rgb(ycc[0], ycc[1], ycc[2],
&rgb[0], &rgb[1], &rgb[2],
BLI_YCC_ITU_BT709);
EXPECT_V3_NEAR(orig_rgb, rgb, 1e-3);
rgb_to_ycc(orig_rgb[0], orig_rgb[1], orig_rgb[2],
&ycc[0], &ycc[1], &ycc[2],
BLI_YCC_JFIF_0_255);
ycc_to_rgb(ycc[0], ycc[1], ycc[2],
&rgb[0], &rgb[1], &rgb[2],
BLI_YCC_JFIF_0_255);
EXPECT_V3_NEAR(orig_rgb, rgb, 1e-3);
}
TEST(mathutils, LinearRGBTosRGBNearZero)
{
float linear_color = 0.002f;
float srgb_color = linearrgb_to_srgb(linear_color);
EXPECT_NEAR(0.02584f, srgb_color, 1e-5);
}
TEST(mathutils, LinearRGBTosRGB)
{
float linear_color = 0.75f;
float srgb_color = linearrgb_to_srgb(linear_color);
EXPECT_NEAR(0.880824f, srgb_color, 1e-5);
}
TEST(mathutils, LinearRGBTosRGBRoundtrip)
{
const int N = 50;
int i;
for (i = 0; i < N; ++i) {
float orig_linear_color = (float) i / N;
float srgb_color = linearrgb_to_srgb(orig_linear_color);
float linear_color = srgb_to_linearrgb(srgb_color);
EXPECT_NEAR(orig_linear_color, linear_color, 1e-5);
}
}
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