refactor ImGUI code files

internal/igwrap/convert.go

@@ -0,0 +1,26 @@
+package igwrap
+
+import (
+	"edgaru089.ml/go/gl01/internal/util/itype"
+	"github.com/inkyblackness/imgui-go/v4"
+)
+
+// Color converts non-premultiplied RGBA color into imgui.Vec4.
+func Color(r, g, b, a uint8) imgui.Vec4 {
+	return imgui.Vec4{
+		X: float32(r) / 255,
+		Y: float32(g) / 255,
+		Z: float32(b) / 255,
+		W: float32(a) / 255,
+	}
+}
+
+// Vec2 converts itype.Vec2f to imgui.Vec2.
+func Vec2(v itype.Vec2f) imgui.Vec2 {
+	return imgui.Vec2{X: v[0], Y: v[1]}
+}
+
+// Vec4 converts itype.Vec4f to imgui.Vec4.
+func Vec4(v itype.Vec4f) imgui.Vec4 {
+	return imgui.Vec4{X: v[0], Y: v[1], Z: v[2], W: v[3]}
+}