136 lines
3.6 KiB
Go
136 lines
3.6 KiB
Go
package draw2d
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"image"
|
|
"image/color"
|
|
"image/draw"
|
|
"image/png"
|
|
"log"
|
|
"os"
|
|
"testing"
|
|
|
|
"github.com/llgcode/draw2d/raster"
|
|
)
|
|
|
|
var (
|
|
flattening_threshold float64 = 0.5
|
|
testsCubicFloat64 = []float64{
|
|
100, 100, 200, 100, 100, 200, 200, 200,
|
|
100, 100, 300, 200, 200, 200, 300, 100,
|
|
100, 100, 0, 300, 200, 0, 300, 300,
|
|
150, 290, 10, 10, 290, 10, 150, 290,
|
|
10, 290, 10, 10, 290, 10, 290, 290,
|
|
100, 290, 290, 10, 10, 10, 200, 290,
|
|
}
|
|
testsQuadFloat64 = []float64{
|
|
100, 100, 200, 100, 200, 200,
|
|
100, 100, 290, 200, 290, 100,
|
|
100, 100, 0, 290, 200, 290,
|
|
150, 290, 10, 10, 290, 290,
|
|
10, 290, 10, 10, 290, 290,
|
|
100, 290, 290, 10, 120, 290,
|
|
}
|
|
)
|
|
|
|
func init() {
|
|
os.Mkdir("test_results", 0666)
|
|
f, err := os.Create("test_results/_test.html")
|
|
if err != nil {
|
|
log.Println(err)
|
|
os.Exit(1)
|
|
}
|
|
defer f.Close()
|
|
log.Printf("Create html viewer")
|
|
f.Write([]byte("<html><body>"))
|
|
for i := 0; i < len(testsCubicFloat64)/8; i++ {
|
|
f.Write([]byte(fmt.Sprintf("<div><img src='_test%d.png'/></div>\n", i)))
|
|
}
|
|
for i := 0; i < len(testsQuadFloat64); i++ {
|
|
f.Write([]byte(fmt.Sprintf("<div><img src='_testQuad%d.png'/>\n</div>\n", i)))
|
|
}
|
|
f.Write([]byte("</body></html>"))
|
|
|
|
}
|
|
|
|
func drawPoints(img draw.Image, c color.Color, s ...float64) image.Image {
|
|
for i := 0; i < len(s); i += 2 {
|
|
x, y := int(s[i]+0.5), int(s[i+1]+0.5)
|
|
img.Set(x, y, c)
|
|
img.Set(x, y+1, c)
|
|
img.Set(x, y-1, c)
|
|
img.Set(x+1, y, c)
|
|
img.Set(x+1, y+1, c)
|
|
img.Set(x+1, y-1, c)
|
|
img.Set(x-1, y, c)
|
|
img.Set(x-1, y+1, c)
|
|
img.Set(x-1, y-1, c)
|
|
|
|
}
|
|
return img
|
|
}
|
|
|
|
func TestCubicCurve(t *testing.T) {
|
|
for i := 0; i < len(testsCubicFloat64); i += 8 {
|
|
var p SegmentedPath
|
|
p.MoveTo(testsCubicFloat64[i], testsCubicFloat64[i+1])
|
|
TraceCubic(&p, testsCubicFloat64[i:], flattening_threshold)
|
|
img := image.NewNRGBA(image.Rect(0, 0, 300, 300))
|
|
raster.PolylineBresenham(img, color.NRGBA{0xff, 0, 0, 0xff}, testsCubicFloat64[i:i+8]...)
|
|
raster.PolylineBresenham(img, image.Black, p.Points...)
|
|
//drawPoints(img, image.NRGBAColor{0, 0, 0, 0xff}, curve[:]...)
|
|
drawPoints(img, color.NRGBA{0, 0, 0, 0xff}, p.Points...)
|
|
SaveToPngFile(fmt.Sprintf("test_results/_test%d.png", i/8), img)
|
|
log.Printf("Num of points: %d\n", len(p.Points))
|
|
}
|
|
fmt.Println()
|
|
}
|
|
|
|
func TestQuadCurve(t *testing.T) {
|
|
for i := 0; i < len(testsQuadFloat64); i += 6 {
|
|
var p SegmentedPath
|
|
p.MoveTo(testsQuadFloat64[i], testsQuadFloat64[i+1])
|
|
TraceQuad(&p, testsQuadFloat64[i:], flattening_threshold)
|
|
img := image.NewNRGBA(image.Rect(0, 0, 300, 300))
|
|
raster.PolylineBresenham(img, color.NRGBA{0xff, 0, 0, 0xff}, testsQuadFloat64[i:i+6]...)
|
|
raster.PolylineBresenham(img, image.Black, p.Points...)
|
|
//drawPoints(img, image.NRGBAColor{0, 0, 0, 0xff}, curve[:]...)
|
|
drawPoints(img, color.NRGBA{0, 0, 0, 0xff}, p.Points...)
|
|
SaveToPngFile(fmt.Sprintf("test_results/_testQuad%d.png", i), img)
|
|
log.Printf("Num of points: %d\n", len(p.Points))
|
|
}
|
|
fmt.Println()
|
|
}
|
|
|
|
func BenchmarkCubicCurve(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
for i := 0; i < len(testsCubicFloat64); i += 8 {
|
|
var p SegmentedPath
|
|
p.MoveTo(testsCubicFloat64[i], testsCubicFloat64[i+1])
|
|
TraceCubic(&p, testsCubicFloat64[i:], flattening_threshold)
|
|
}
|
|
}
|
|
}
|
|
|
|
// SaveToPngFile create and save an image to a file using PNG format
|
|
func SaveToPngFile(filePath string, m image.Image) error {
|
|
// Create the file
|
|
f, err := os.Create(filePath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close()
|
|
// Create Writer from file
|
|
b := bufio.NewWriter(f)
|
|
// Write the image into the buffer
|
|
err = png.Encode(b, m)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = b.Flush()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|