forked from shibukawa/nanovgo
/
sample.go
117 lines (95 loc) · 2.69 KB
/
sample.go
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// +build !js
package main
import (
"fmt"
"github.com/goxjs/gl"
"github.com/goxjs/glfw"
"github.com/gianpaolog/nanovgo"
"github.com/gianpaolog/nanovgo/perfgraph"
"github.com/gianpaolog/nanovgo/sample/demo"
"log"
)
var blowup bool
var premult bool
func key(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
if key == glfw.KeyEscape && action == glfw.Press {
w.SetShouldClose(true)
} else if key == glfw.KeySpace && action == glfw.Press {
blowup = !blowup
} else if key == glfw.KeyP && action == glfw.Press {
premult = !premult
}
}
func main() {
err := glfw.Init(gl.ContextWatcher)
if err != nil {
panic(err)
}
defer glfw.Terminate()
// demo MSAA
glfw.WindowHint(glfw.Samples, 4)
window, err := glfw.CreateWindow(1000, 600, "NanoVGo", nil, nil)
if err != nil {
panic(err)
}
window.SetKeyCallback(key)
window.MakeContextCurrent()
ctx, err := nanovgo.NewContext(0 /*nanovgo.AntiAlias | nanovgo.StencilStrokes | nanovgo.Debug*/)
defer ctx.Delete()
if err != nil {
panic(err)
}
demoData := LoadDemo(ctx)
glfw.SwapInterval(0)
fps := perfgraph.NewPerfGraph("Frame Time", "sans")
for !window.ShouldClose() {
t, _ := fps.UpdateGraph()
fbWidth, fbHeight := window.GetFramebufferSize()
winWidth, winHeight := window.GetSize()
mx, my := window.GetCursorPos()
pixelRatio := float32(fbWidth) / float32(winWidth)
gl.Viewport(0, 0, fbWidth, fbHeight)
if premult {
gl.ClearColor(0, 0, 0, 0)
} else {
gl.ClearColor(0.3, 0.3, 0.32, 1.0)
}
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.CULL_FACE)
gl.Disable(gl.DEPTH_TEST)
ctx.BeginFrame(winWidth, winHeight, pixelRatio)
demo.RenderDemo(ctx, float32(mx), float32(my), float32(winWidth), float32(winHeight), t, blowup, demoData)
fps.RenderGraph(ctx, 5, 5)
ctx.EndFrame()
gl.Enable(gl.DEPTH_TEST)
window.SwapBuffers()
glfw.PollEvents()
}
demoData.FreeData(ctx)
}
func LoadDemo(ctx *nanovgo.Context) *demo.DemoData {
d := &demo.DemoData{}
for i := 0; i < 12; i++ {
path := fmt.Sprintf("images/image%d.jpg", i+1)
handle, _ := ctx.CreateImage(path, 0)
d.Images = append(d.Images, handle)
if d.Images[i] == 0 {
log.Fatalf("Could not load %s", path)
}
}
d.FontIcons = ctx.CreateFont("icons", "entypo.ttf")
if d.FontIcons == -1 {
log.Fatalln("Could not add font icons.")
}
d.FontNormal = ctx.CreateFont("sans", "Roboto-Regular.ttf")
if d.FontNormal == -1 {
log.Fatalln("Could not add font italic.")
}
d.FontBold = ctx.CreateFont("sans-bold", "Roboto-Bold.ttf")
if d.FontBold == -1 {
log.Fatalln("Could not add font bold.")
}
return d
}