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[kandinsky/color] Add tests on color blending

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Change-Id: If1792bd9ec44052238632d28b806f5582b190fe9
This commit is contained in:
Gabriel Ozouf
2020-08-19 16:12:18 +02:00
committed by EmilieNumworks
parent 078bba2fb9
commit e33543aacb
1 changed files with 19 additions and 4 deletions
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23
kandinsky/test/color.cpp
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@@ -17,10 +17,25 @@ QUIZ_CASE(kandinsky_color_rgb) {
quiz_assert(KDColor::RGB24(0x123456) == 0x11AA);
}
void assert_colors_blend_to(KDColor c1, KDColor c2, uint8_t alpha, KDColor res) {
quiz_assert(KDColor::blend(c1, c2, alpha) == res );
}
QUIZ_CASE(kandinsky_color_blend) {
KDColor midGray = KDColor::RGB24(0x7F7F7F);
KDColor res = KDColor::blend(KDColorWhite, KDColorBlack, 0xFF);
quiz_assert(res == KDColorWhite);
quiz_assert(KDColor::blend(KDColorWhite, KDColorBlack, 0) == KDColorBlack);
quiz_assert(KDColor::blend(KDColorWhite, KDColorBlack, 0x7F) == midGray);
KDColor midTurquoise = KDColor::RGB24(0x007F7F);
assert_colors_blend_to(KDColorWhite, KDColorBlack, 0x00, KDColorBlack);
assert_colors_blend_to(KDColorWhite, KDColorBlack, 0xFF, KDColorWhite);
assert_colors_blend_to(KDColorWhite, KDColorBlack, 0x7F, midGray);
assert_colors_blend_to(KDColorGreen, KDColorBlue, 0x00, KDColorBlue);
assert_colors_blend_to(KDColorGreen, KDColorBlue, 0xFF, KDColorGreen);
assert_colors_blend_to(KDColorGreen, KDColorBlue, 0x7F, midTurquoise);
// Assert that blending two identical colors does not produce strange colors.
for (uint16_t col = 0; col < 0xFFFF; col++) {
KDColor color = KDColor::RGB16(col);
assert_colors_blend_to(color, color, col>>8, color);
}
}