102 lines
2.6 KiB
V
102 lines
2.6 KiB
V
import gx
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fn test_hex() {
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// valid colors
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a := gx.hex(0x6c5ce7ff)
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b := gx.rgba(108, 92, 231, 255)
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assert a == b
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// doesn't give right value with short hex value
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short := gx.hex(0xfff)
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assert short != gx.white
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assert short == gx.Color{0, 0, 15, 255}
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}
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fn test_add() {
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a := gx.rgba(100, 100, 100, 100)
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b := gx.rgba(100, 100, 100, 100)
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r := gx.rgba(200, 200, 200, 200)
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assert (a + b) == r
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//
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assert gx.red + gx.green == gx.yellow
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assert gx.red + gx.blue == gx.magenta
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assert gx.green + gx.blue == gx.cyan
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}
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fn test_sub() {
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a := gx.rgba(100, 100, 100, 50)
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b := gx.rgba(100, 100, 100, 100)
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r := gx.rgba(0, 0, 0, 100)
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assert (a - b) == r
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//
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assert gx.white - gx.green == gx.magenta
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assert gx.white - gx.blue == gx.yellow
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assert gx.white - gx.red == gx.cyan
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}
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fn test_mult() {
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a := gx.rgba(10, 10, 10, 10)
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b := gx.rgba(10, 10, 10, 10)
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r := gx.rgba(100, 100, 100, 100)
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assert (a * b) == r
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}
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fn test_div() {
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a := gx.rgba(100, 100, 100, 100)
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b := gx.rgba(10, 10, 10, 10)
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r := gx.rgba(10, 10, 10, 10)
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assert (a / b) == r
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}
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fn test_rgba8() {
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assert gx.white.rgba8() == -1
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assert gx.black.rgba8() == 255
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assert gx.red.rgba8() == -16776961
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assert gx.green.rgba8() == 16711935
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assert gx.blue.rgba8() == 65535
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}
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fn test_bgra8() {
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assert gx.white.bgra8() == -1
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assert gx.black.bgra8() == 255
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assert gx.red.bgra8() == 65535
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assert gx.green.bgra8() == 16711935
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assert gx.blue.bgra8() == -16776961
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}
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fn test_abgr8() {
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assert gx.white.abgr8() == -1
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assert gx.black.abgr8() == -16777216
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assert gx.red.abgr8() == -16776961
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assert gx.green.abgr8() == -16711936
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assert gx.blue.abgr8() == -65536
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}
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fn test_over() {
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// shorten names:
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r := gx.red
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g := gx.green
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b := gx.blue
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y := gx.yellow
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semi_r := gx.Color{255, 0, 0, 128}
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semi_g := gx.Color{0, 255, 0, 128}
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semi_b := gx.Color{0, 0, 255, 128}
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// fully opaque colors, should be preserved when layed *over* any others:
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assert b.over(g) == b
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assert r.over(g) == r
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assert y.over(r) == y
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assert g.over(r) == g
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// half transparent pure colors, *over* pure colors, should preserve them correspondingly:
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assert semi_r.over(r) == gx.Color{255, 0, 0, 255} // preserve pure red
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assert semi_r.over(g) == gx.Color{128, 126, 0, 255}
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assert semi_r.over(b) == gx.Color{128, 0, 126, 255}
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assert semi_g.over(r) == gx.Color{126, 128, 0, 255}
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assert semi_g.over(g) == gx.Color{0, 255, 0, 255} // preserve pure green
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assert semi_g.over(b) == gx.Color{0, 128, 126, 255}
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assert semi_b.over(r) == gx.Color{126, 0, 128, 255}
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assert semi_b.over(g) == gx.Color{0, 126, 128, 255}
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assert semi_b.over(b) == gx.Color{0, 0, 255, 255} // preserve pure blue
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}
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