summaryrefslogtreecommitdiff
path: root/test_helpers.go
diff options
context:
space:
mode:
authorNick White <git@njw.name>2019-10-08 15:37:07 +0100
committerNick White <git@njw.name>2019-10-08 15:37:07 +0100
commit787d63fc5d13c6250bd33da5a8e1eadbe86188cd (patch)
tree0b6888914ec5a492f95e256095799096ff4d7873 /test_helpers.go
parentd43c11bf653bfe3c1ad1ed277f1ec08bf155cf98 (diff)
Continue separating the repository; remove all but preproc, and move integralimg package under it
Diffstat (limited to 'test_helpers.go')
-rw-r--r--test_helpers.go53
1 files changed, 53 insertions, 0 deletions
diff --git a/test_helpers.go b/test_helpers.go
new file mode 100644
index 0000000..20de5b1
--- /dev/null
+++ b/test_helpers.go
@@ -0,0 +1,53 @@
+package preproc
+
+// TODO: add different pages as test cases
+// TODO: test non integral img version
+
+import (
+ "image"
+ "image/draw"
+ "image/png"
+ "os"
+)
+
+func decode(s string) (*image.Gray, error) {
+ f, err := os.Open(s)
+ defer f.Close()
+ if err != nil {
+ return nil, err
+ }
+ img, err := png.Decode(f)
+ if err != nil {
+ return nil, err
+ }
+ b := img.Bounds()
+ gray := image.NewGray(image.Rect(0, 0, b.Dx(), b.Dy()))
+ draw.Draw(gray, b, img, b.Min, draw.Src)
+ return gray, nil
+}
+
+func imgsequal(img1 *image.Gray, img2 *image.Gray) bool {
+ b := img1.Bounds()
+ if !b.Eq(img2.Bounds()) {
+ return false
+ }
+ for y := b.Min.Y; y < b.Max.Y; y++ {
+ for x := b.Min.X; x < b.Max.X; x++ {
+ r0, g0, b0, a0 := img1.At(x, y).RGBA()
+ r1, g1, b1, a1 := img2.At(x, y).RGBA()
+ if r0 != r1 {
+ return false
+ }
+ if g0 != g1 {
+ return false
+ }
+ if b0 != b1 {
+ return false
+ }
+ if a0 != a1 {
+ return false
+ }
+ }
+ }
+ return true
+}