98 lines
2 KiB
Go
98 lines
2 KiB
Go
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// See also test_test.go
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package draw2d_test
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import (
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"fmt"
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"github.com/golang/freetype/truetype"
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"github.com/llgcode/draw2d"
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"github.com/llgcode/draw2d/draw2dimg"
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"github.com/llgcode/draw2d/draw2dkit"
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"image"
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"io/ioutil"
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"path/filepath"
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"sync"
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"testing"
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)
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func TestSync(t *testing.T) {
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ch := make(chan int)
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limit := 200
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for i := 0; i < limit; i++ {
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go Draw(i, ch)
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}
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for i := 0; i < limit; i++ {
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counter := <-ch
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t.Logf("Goroutine %d returned\n", counter)
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}
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}
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func Draw(i int, ch chan<- int) {
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draw2d.SetFontCache(testCache)
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// Draw a rounded rectangle using default colors
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dest := image.NewRGBA(image.Rect(0, 0, 297, 210.0))
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gc := draw2dimg.NewGraphicContext(dest)
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draw2dkit.RoundedRectangle(gc, 5, 5, 135, 95, 10, 10)
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gc.FillStroke()
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// Set the fill text color to black
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gc.SetFillColor(image.Black)
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gc.SetFontSize(14)
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// Display Hello World dimensions
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x1, y1, x2, y2 := gc.GetStringBounds("Hello world")
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gc.FillStringAt(fmt.Sprintf("%.2f %.2f %.2f %.2f", x1, y1, x2, y2), 0, 0)
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ch <- i
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}
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//testFontCache closely follows draw2d's defaultFontCache
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type testFontCache struct {
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fonts map[string]*truetype.Font
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folder string
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namer draw2d.FontFileNamer
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}
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func (cache *testFontCache) Load(fontData draw2d.FontData) (font *truetype.Font, err error) {
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if font = cache.fonts[cache.namer(fontData)]; font != nil {
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return font, nil
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}
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var data []byte
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var file = cache.namer(fontData)
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if data, err = ioutil.ReadFile(filepath.Join(cache.folder, file)); err != nil {
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return
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}
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if font, err = truetype.Parse(data); err != nil {
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return
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}
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var mu sync.Mutex
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mu.Lock()
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cache.fonts[file] = font
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mu.Unlock()
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return
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}
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func (cache *testFontCache) Store(fontData draw2d.FontData, font *truetype.Font) {
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var mu sync.Mutex
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mu.Lock()
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cache.fonts[cache.namer(fontData)] = font
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mu.Unlock()
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}
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var (
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testFonts = &testFontCache{
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fonts: make(map[string]*truetype.Font),
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folder: "./resource/font",
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namer: draw2d.FontFileName,
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}
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testCache draw2d.FontCache = testFonts
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)
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