diff options
Diffstat (limited to 'vendor/github.com/disintegration/imaging/tools_test.go')
-rw-r--r-- | vendor/github.com/disintegration/imaging/tools_test.go | 652 |
1 files changed, 652 insertions, 0 deletions
diff --git a/vendor/github.com/disintegration/imaging/tools_test.go b/vendor/github.com/disintegration/imaging/tools_test.go new file mode 100644 index 000000000..2ac7b31d3 --- /dev/null +++ b/vendor/github.com/disintegration/imaging/tools_test.go @@ -0,0 +1,652 @@ +package imaging + +import ( + "image" + "testing" +) + +func TestCrop(t *testing.T) { + td := []struct { + desc string + src image.Image + r image.Rectangle + want *image.NRGBA + }{ + { + "Crop 2x3 2x1", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + image.Rect(-1, 0, 1, 1), + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 1), + Stride: 2 * 4, + Pix: []uint8{ + 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, + }, + }, + }, + } + for _, d := range td { + got := Crop(d.src, d.r) + want := d.want + if !compareNRGBA(got, want, 0) { + t.Errorf("test [%s] failed: %#v", d.desc, got) + } + } +} + +func TestCropCenter(t *testing.T) { + td := []struct { + desc string + src image.Image + w, h int + want *image.NRGBA + }{ + { + "CropCenter 2x3 2x1", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + 2, 1, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 1), + Stride: 2 * 4, + Pix: []uint8{ + 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, + }, + }, + }, + { + "CropCenter 2x3 0x1", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + 0, 1, + &image.NRGBA{ + Rect: image.Rect(0, 0, 0, 0), + Stride: 0, + Pix: []uint8{}, + }, + }, + { + "CropCenter 2x3 5x5", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + 5, 5, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 3), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + }, + } + for _, d := range td { + got := CropCenter(d.src, d.w, d.h) + want := d.want + if !compareNRGBA(got, want, 0) { + t.Errorf("test [%s] failed: %#v", d.desc, got) + } + } +} + +func TestCropAnchor(t *testing.T) { + td := []struct { + desc string + src image.Image + w, h int + anchor Anchor + want *image.NRGBA + }{ + { + "CropAnchor 4x4 2x2 TopLeft", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 2, 2, + TopLeft, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + }, + }, + }, + { + "CropAnchor 4x4 2x2 Top", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 2, 2, + Top, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, + 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, + }, + }, + }, + { + "CropAnchor 4x4 2x2 TopRight", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 2, 2, + TopRight, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + }, + }, + }, + { + "CropAnchor 4x4 2x2 Left", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 2, 2, + Left, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, + }, + }, + }, + { + "CropAnchor 4x4 2x2 Center", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 2, 2, + Center, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, + 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, + }, + }, + }, + { + "CropAnchor 4x4 2x2 Right", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 2, 2, + Right, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + }, + }, + }, + { + "CropAnchor 4x4 2x2 BottomLeft", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 2, 2, + BottomLeft, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, + }, + }, + }, + { + "CropAnchor 4x4 2x2 Bottom", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 2, 2, + Bottom, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, + 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, + }, + }, + }, + { + "CropAnchor 4x4 2x2 BottomRight", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 2, 2, + BottomRight, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + }, + { + "CropAnchor 4x4 0x0 BottomRight", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 0, 0, + BottomRight, + &image.NRGBA{ + Rect: image.Rect(0, 0, 0, 0), + Stride: 0, + Pix: []uint8{}, + }, + }, + { + "CropAnchor 4x4 100x100 BottomRight", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 100, 100, + BottomRight, + &image.NRGBA{ + Rect: image.Rect(0, 0, 4, 4), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + }, + { + "CropAnchor 4x4 1x100 BottomRight", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 1, 100, + BottomRight, + &image.NRGBA{ + Rect: image.Rect(0, 0, 1, 4), + Stride: 1 * 4, + Pix: []uint8{ + 0x0c, 0x0d, 0x0e, 0x0f, + 0x1c, 0x1d, 0x1e, 0x1f, + 0x2c, 0x2d, 0x2e, 0x2f, + 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + }, + { + "CropAnchor 4x4 0x100 BottomRight", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 3, 3), + Stride: 4 * 4, + Pix: []uint8{ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + }, + }, + 0, 100, + BottomRight, + &image.NRGBA{ + Rect: image.Rect(0, 0, 0, 0), + Stride: 0, + Pix: []uint8{}, + }, + }, + } + for _, d := range td { + got := CropAnchor(d.src, d.w, d.h, d.anchor) + want := d.want + if !compareNRGBA(got, want, 0) { + t.Errorf("test [%s] failed: %#v", d.desc, got) + } + } +} + +func TestPaste(t *testing.T) { + td := []struct { + desc string + src1 image.Image + src2 image.Image + p image.Point + want *image.NRGBA + }{ + { + "Paste 2x3 2x1", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + &image.NRGBA{ + Rect: image.Rect(1, 1, 3, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + }, + }, + image.Pt(-1, 0), + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 3), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + }, + } + for _, d := range td { + got := Paste(d.src1, d.src2, d.p) + want := d.want + if !compareNRGBA(got, want, 0) { + t.Errorf("test [%s] failed: %#v", d.desc, got) + } + } +} + +func TestPasteCenter(t *testing.T) { + td := []struct { + desc string + src1 image.Image + src2 image.Image + want *image.NRGBA + }{ + { + "PasteCenter 2x3 2x1", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + &image.NRGBA{ + Rect: image.Rect(1, 1, 3, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + }, + }, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 3), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + }, + } + for _, d := range td { + got := PasteCenter(d.src1, d.src2) + want := d.want + if !compareNRGBA(got, want, 0) { + t.Errorf("test [%s] failed: %#v", d.desc, got) + } + } +} + +func TestOverlay(t *testing.T) { + td := []struct { + desc string + src1 image.Image + src2 image.Image + p image.Point + a float64 + want *image.NRGBA + }{ + { + "Overlay 2x3 2x1 1.0", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0x60, 0x00, 0x90, 0xff, 0xff, 0x00, 0x99, 0x7f, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + &image.NRGBA{ + Rect: image.Rect(1, 1, 3, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x20, 0x40, 0x80, 0x7f, 0xaa, 0xbb, 0xcc, 0xff, + }, + }, + image.Pt(-1, 0), + 1.0, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 3), + Stride: 2 * 4, + Pix: []uint8{ + 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff, + 0x40, 0x1f, 0x88, 0xff, 0xaa, 0xbb, 0xcc, 0xff, + 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, + }, + }, + }, + { + "Overlay 2x2 2x2 0.5", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 1), + Stride: 2 * 4, + Pix: []uint8{ + 0xff, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, + 0x00, 0x00, 0xff, 0xff, 0x20, 0x20, 0x20, 0x00, + }, + }, + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 1), + Stride: 2 * 4, + Pix: []uint8{ + 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, + 0xff, 0xff, 0x00, 0xff, 0x20, 0x20, 0x20, 0xff, + }, + }, + image.Pt(-1, -1), + 0.5, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0xff, 0x7f, 0x7f, 0xff, 0x00, 0xff, 0x00, 0xff, + 0x7f, 0x7f, 0x7f, 0xff, 0x20, 0x20, 0x20, 0x7f, + }, + }, + }, + } + for _, d := range td { + got := Overlay(d.src1, d.src2, d.p, d.a) + want := d.want + if !compareNRGBA(got, want, 1) { + t.Errorf("test [%s] failed: %#v", d.desc, got) + } + } +} + +func TestOverlayCenter(t *testing.T) { + td := []struct { + desc string + src1 image.Image + src2 image.Image + a float64 + want *image.NRGBA + }{ + { + "OverlayCenter 2x3 2x1", + &image.NRGBA{ + Rect: image.Rect(-1, -1, 1, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x10, 0x10, 0x10, 0xff, 0x10, 0x10, 0x10, 0xff, + 0x10, 0x10, 0x10, 0xff, 0x10, 0x10, 0x10, 0xff, + 0x10, 0x10, 0x10, 0xff, 0x10, 0x10, 0x10, 0xff, + }, + }, + &image.NRGBA{ + Rect: image.Rect(1, 1, 3, 2), + Stride: 2 * 4, + Pix: []uint8{ + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + }, + }, + 0.5, + &image.NRGBA{ + Rect: image.Rect(0, 0, 2, 3), + Stride: 2 * 4, + Pix: []uint8{ + 0x10, 0x10, 0x10, 0xff, 0x10, 0x10, 0x10, 0xff, + 0x2c, 0x2c, 0x2c, 0xff, 0x2c, 0x2c, 0x2c, 0xff, + 0x10, 0x10, 0x10, 0xff, 0x10, 0x10, 0x10, 0xff, + }, + }, + }, + } + for _, d := range td { + got := OverlayCenter(d.src1, d.src2, 0.5) + want := d.want + if !compareNRGBA(got, want, 0) { + t.Errorf("test [%s] failed: %#v", d.desc, got) + } + } +} |