From 783ea0c3f6aa5a74c1f858514939696ba623adc7 Mon Sep 17 00:00:00 2001
From: liuxiaolong <liuxiaolong@aiotlink.com>
Date: 星期二, 09 六月 2020 14:18:37 +0800
Subject: [PATCH] fix DrawRect,use drawLine
---
extend/util/image.go | 165 ++++++++++++++++++++++++++++++++++++++++++------------
1 files changed, 128 insertions(+), 37 deletions(-)
diff --git a/extend/util/image.go b/extend/util/image.go
index 585d0e1..509e338 100644
--- a/extend/util/image.go
+++ b/extend/util/image.go
@@ -61,51 +61,142 @@
return x0_new, y0_new, x1_new, y1_new
}
-func DrawRect(img *protomsg.Image, rect *protomsg.Rect) ([]byte, error) {
- red := color.RGBA{255, 0, 0, 0}
-
- targetRect := image.Rect(int(rect.Left), int(rect.Top), int(rect.Right), int(rect.Bottom))
- bgImg, err := godraw.ToImage(img.Data, int(img.Width), int(img.Height))
- if err == nil {
- err1 := godraw.DrawRectangle(bgImg, targetRect, red, 2)
- if err1 != nil {
- return nil, err1
- } else {
- bytes,err := godraw.ImageToJpeg(bgImg, nil)
- if err != nil {
- return nil, err
- }
- return bytes, nil
- }
+// 闀垮鍙樹负涓�姣斾竴锛屾瘡杈瑰悇鎵╃櫨鍒嗕箣20
+func EnlargeSizeForCar(x0, y0, x1, y1 int, i protomsg.Image) (x0_new, y0_new, x1_new, y1_new int) {
+ // 鍏堟妸闀垮鍙樹负涓�姣斾竴
+ chazhi := (y1 - y0) - (x1 - x0)
+ x0 = x0 - chazhi/2
+ if x0 < 0 {
+ x0 = 0
+ }
+ x1 = x1 + chazhi/2
+ if x1 > int(i.Width) {
+ x1 = int(i.Width)
}
- return nil, err
+ // 鍐嶆妸姣忚竟鍚勬墿澶х櫨鍒嗕箣20
+ enlarge := float32(0.2)
+ x0_new = int((1+enlarge)*float32(x0) - enlarge*float32(x1))
+ if x0_new < 0 {
+ x0_new = 0
+ }
+ x1_new = int((1+enlarge)*float32(x1) - enlarge*float32(x0))
+ if x1_new > int(i.Width) {
+ x1_new = int(i.Width)
+ }
+ y0_new = int((1+enlarge)*float32(y0) - enlarge*float32(y1))
+ if y0_new < 0 {
+ y0_new = 0
+ }
+ y1_new = int((1+enlarge)*float32(y1) - enlarge*float32(y0))
+ if y1_new > int(i.Height) {
+ y1_new = int(i.Height)
+ }
+ return
}
-func DrawPolygon(img *protomsg.Image, points []protomsg.Point) ([]byte, error) {
+// 涓嶆墿杈�
+func EnlargeSize(x0, y0, x1, y1 int, i protomsg.Image) (int, int, int, int) {
- var pts []image.Point
- for _, pt := range points {
- pts = append(pts, image.Point{
- X: int(pt.X),
- Y: int(pt.Y),
- })
+ // 鍏堟妸闀垮鍙樹负涓�姣斾竴
+ chazhi := (y1 - y0) - (x1 - x0)
+ x0 = x0 - chazhi/2
+ if x0 < 0 {
+ x0 = 0
}
- yellow := color.RGBA{255, 255, 0, 0}
+ x1 = x1 + chazhi/2
+ if x1 > int(i.Width) {
+ x1 = int(i.Width)
+ }
- bgImg, err := godraw.ToImage(img.Data, int(img.Width), int(img.Height))
- if err == nil {
- err1 := godraw.DrawPolygon(bgImg, pts, yellow,2)
- if err1 != nil {
- return nil, err1
- } else {
- bytes,err := godraw.ImageToJpeg(bgImg, nil)
- if err != nil {
- return nil, err
- }
- return bytes, nil
+ if y0 < 0 {
+ y0 = 0
+ }
+
+ if y1 > int(i.Height) {
+ y1 = int(i.Height)
+ }
+
+ return x0, y0, x1, y1
+}
+
+// 闀垮鍙樹负涓�姣斾竴锛屾瘡杈瑰悇鎵╃櫨鍒嗕箣50
+func EnlargeSizeForTem(x0, y0, x1, y1 int, i protomsg.Image) (x0_new, y0_new, x1_new, y1_new int) {
+ // 鍏堟妸闀垮鍙樹负涓�姣斾竴
+ chazhi := (y1 - y0) - (x1 - x0)
+ x0 = x0 - chazhi/2
+ if x0 < 0 {
+ x0 = 0
+ }
+ x1 = x1 + chazhi/2
+ if x1 > int(i.Width) {
+ x1 = int(i.Width)
+ }
+
+ // 鍐嶆妸姣忚竟鍚勬墿澶х櫨鍒嗕箣50
+ enlarge := float32(0.5)
+ x0_new = int((1+enlarge)*float32(x0) - enlarge*float32(x1))
+ if x0_new < 0 {
+ x0_new = 0
+ }
+ x1_new = int((1+enlarge)*float32(x1) - enlarge*float32(x0))
+ if x1_new > int(i.Width) {
+ x1_new = int(i.Width)
+ }
+ y0_new = int((1+enlarge)*float32(y0) - enlarge*float32(y1))
+ if y0_new < 0 {
+ y0_new = 0
+ }
+ y1_new = int((1+enlarge)*float32(y1) - enlarge*float32(y0))
+ if y1_new > int(i.Height) {
+ y1_new = int(i.Height)
+ }
+ return
+}
+
+func drawLine(img *image.RGBA, x0, y0, x1, y1 int, c color.Color) {
+ var dx int
+ if x1 > x0 {
+ dx = x1 - x0
+ } else {
+ dx = x0 - x1
+ }
+ var dy int
+ if y1 > y0 {
+ dy = y1 - y0
+ } else {
+ dy = y0 - y1
+ }
+
+ sx, sy := 1, 1
+ if x0 >= x1 {
+ sx = -1
+ }
+ if y0 >= y1 {
+ sy = -1
+ }
+ err := dx - dy
+
+ for {
+ img.Set(x0, y0, c)
+ if x0 == x1 && y0 == y1 {
+ return
+ }
+ e2 := err * 2
+ if e2 > -dy {
+ err -= dy
+ x0 += sx
+ }
+ if e2 < dx {
+ err += dx
+ y0 += sy
}
}
+}
- return nil, err
+func DrawRect(img *image.RGBA, x0, y0, x1, y1 int, c color.Color) {
+ drawLine(img, x0, y0, x1, y0, c)
+ drawLine(img, x1, y0, x1, y1, c)
+ drawLine(img, x1, y1, x0, y1, c)
+ drawLine(img, x0, y1, x0, y0, c)
}
\ No newline at end of file
--
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