pixel: add NewImageFromBytes() function to allow creating image from existing slice

Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2024-10-26 18:00:33 +02:00
parent 30f540c29f
commit b7bbecc456
2 changed files with 126 additions and 10 deletions
+92 -10
View File
@@ -66,9 +66,9 @@ func TestImageRGB444BE(t *testing.T) {
}
func TestImageMonochrome(t *testing.T) {
image := pixel.NewImage[pixel.Monochrome](5, 3)
if width, height := image.Size(); width != 5 && height != 3 {
t.Errorf("image.Size(): expected 5, 3 but got %d, %d", width, height)
image := pixel.NewImage[pixel.Monochrome](128, 64)
if width, height := image.Size(); width != 128 && height != 64 {
t.Errorf("image.Size(): expected 128, 64 but got %d, %d", width, height)
}
for _, expected := range []color.RGBA{
{R: 0xff, G: 0xff, B: 0xff},
@@ -80,19 +80,101 @@ func TestImageMonochrome(t *testing.T) {
{B: 0x00, A: 0xff},
} {
encoded := pixel.NewColor[pixel.Monochrome](expected.R, expected.G, expected.B)
image.Set(4, 2, encoded)
actual := image.Get(4, 2).RGBA()
image.Set(5, 3, encoded)
actual := image.Get(5, 3).RGBA()
switch {
case expected.R == 0 && expected.G == 0 && expected.B == 0:
// should be false eg black
if actual.R != 0 || actual.G != 0 || actual.B != 0 {
t.Errorf("failed to roundtrip color: expected %v but got %v", expected, actual)
}
case int(expected.R)+int(expected.G)+int(expected.B) > 128*3:
// should be true eg white
if actual.R == 0 || actual.G == 0 || actual.B == 0 {
t.Errorf("failed to roundtrip color: expected %v but got %v", expected, actual)
}
default:
// should be false eg black
if actual.R != 0 || actual.G != 0 || actual.B != 0 {
t.Errorf("failed to roundtrip color: expected %v but got %v", expected, actual)
}
}
}
}
// 128x128
var rprofile = []byte{
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0x3F, 0xFF, 0xF8, 0x3C, 0x00, 0x00, 0x00, 0x00, 0xE0, 0x00, 0x00, 0x00, 0x1E, 0x1F, 0xFF, 0xFE, 0x3F, 0xFF, 0xFC, 0x3C, 0x00, 0x00, 0x00, 0x07, 0xC0, 0x00, 0x00, 0x00, 0x1C, 0x1F, 0xFF, 0xFC,
0x3F, 0xFF, 0xFC, 0x3C, 0x00, 0x00, 0x00, 0x17, 0xC0, 0x00, 0x00, 0x00, 0x16, 0x3F, 0xFF, 0xFE, 0x3F, 0xFF, 0xFC, 0x3C, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x1E, 0x3F, 0xFF, 0xFE,
0x3F, 0xFF, 0xFC, 0x3C, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x1E, 0x3F, 0xFF, 0xFC, 0x3F, 0xFF, 0xFE, 0x3C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1C, 0x7F, 0xFF, 0xFE,
0x2F, 0xFF, 0xFF, 0xBC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x80, 0x5F, 0xFF, 0xFF, 0xF8, 0x00, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00,
0x01, 0x3F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xA0, 0x00, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF0, 0x00,
0x00, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x80, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x80, 0x00,
0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x80, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
}
func TestImageFromBytesMonochrome(t *testing.T) {
image := pixel.NewImageFromBytes[pixel.Monochrome](128, 128, rprofile)
if width, height := image.Size(); width != 128 && height != 128 {
t.Errorf("image.Size(): expected 128, 128 but got %d, %d", width, height)
}
raw := image.RawBuffer()
for i, b := range raw {
if b != rprofile[i] {
t.Fatalf("failed to roundtrip image. expected %v but got %v", rprofile[i], b)
}
}
}