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call reshape at start up to initiliaze opengl context

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This commit is contained in:
Laurent Le Goff 2015-04-17 15:35:50 +02:00
parent 0abcba8669
commit dba783c8af
1 changed files with 7 additions and 9 deletions
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16
cmd/draw2dgl.go
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@ -41,11 +41,6 @@ var (
) )
func reshape(window *glfw.Window, w, h int) { func reshape(window *glfw.Window, w, h int) {
/* Because Gil specified "screen coordinates" (presumably with an
upper-left origin), this short bit of code sets up the coordinate
system to correspond to actual window coodrinates. This code
wouldn't be required if you chose a (more typical in 3D) abstract
coordinate system. */
gl.ClearColor(1, 1, 1, 1) gl.ClearColor(1, 1, 1, 1)
//fmt.Println(gl.GetString(gl.EXTENSIONS)) //fmt.Println(gl.GetString(gl.EXTENSIONS))
gl.Viewport(0, 0, int32(w), int32(h)) /* Establish viewing area to cover entire window. */ gl.Viewport(0, 0, int32(w), int32(h)) /* Establish viewing area to cover entire window. */
@ -61,7 +56,10 @@ func reshape(window *glfw.Window, w, h int) {
} }
func display() { func display() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
lastTime := time.Now()
gl.LineWidth(1) gl.LineWidth(1)
gc := draw2dgl.NewGraphicContext(width, height) gc := draw2dgl.NewGraphicContext(width, height)
@ -70,14 +68,14 @@ func display() {
rotate = (rotate + 1) % 360 rotate = (rotate + 1) % 360
gc.Rotate(float64(rotate) * math.Pi / 180) gc.Rotate(float64(rotate) * math.Pi / 180)
gc.Translate(-380, -400) gc.Translate(-380, -400)
interpreter := ps.NewInterpreter(gc) interpreter := ps.NewInterpreter(gc)
reader := strings.NewReader(postscriptContent) reader := strings.NewReader(postscriptContent)
lastTime := time.Now()
interpreter.Execute(reader) interpreter.Execute(reader)
dt := time.Now().Sub(lastTime) dt := time.Now().Sub(lastTime)
log.Printf("Redraw in : %f ms\n", float64(dt)*1e-6) log.Printf("Redraw in : %f ms\n", float64(dt)*1e-6)
gl.Flush() /* Single buffered, so needs a flush. */ gl.Flush() /* Single buffered, so needs a flush. */
window.SwapBuffers()
} }
func main() { func main() {
@ -110,11 +108,11 @@ func main() {
if err != nil { if err != nil {
panic(err) panic(err)
} }
reshape(window, 800, 800)
for !window.ShouldClose() { for !window.ShouldClose() {
display() display()
//window.SwapBuffers()
glfw.PollEvents() glfw.PollEvents()
window.SwapBuffers()
// time.Sleep(2 * time.Second) // time.Sleep(2 * time.Second)
} }
} }