114 lines
2.3 KiB
Go
114 lines
2.3 KiB
Go
package bloob
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import (
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_ "embed"
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"fmt"
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"github.com/veandco/go-sdl2/sdl"
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"time"
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)
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type Runnable interface {
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Init(settings *Settings)
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Render(screen *Image)
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Update(bloob *Bloob)
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}
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type Settings struct {
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WindowSize Vec2i
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Scale int
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TargetFps int
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Title string
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}
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type Bloob struct {
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MousePos Vec2i
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Cursor *Image
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}
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var DefaultCursor *Image
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//go:embed "cursor.png"
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var defaultCursorBytes []byte
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func Run(game Runnable) {
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_ = sdl.Init(sdl.INIT_EVERYTHING)
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defer sdl.Quit()
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settings := Settings{
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WindowSize: Vec2i{X: 640, Y: 360},
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Scale: 3,
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TargetFps: 60,
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Title: "Blooblib",
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}
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if DefaultCursor == nil {
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DefaultCursor = LoadImageBytes(defaultCursorBytes)
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}
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bloob := Bloob{
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Cursor: DefaultCursor,
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}
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game.Init(&settings)
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window, _ := sdl.CreateWindow(
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settings.Title,
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sdl.WINDOWPOS_CENTERED,
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sdl.WINDOWPOS_CENTERED,
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int32(settings.WindowSize.X*settings.Scale),
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int32(settings.WindowSize.Y*settings.Scale),
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sdl.WINDOW_SHOWN,
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)
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surface, _ := window.GetSurface()
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windowImage := NewImageFromPointer(surface.Data(), MulScalar(settings.WindowSize, settings.Scale))
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screen := NewImage(settings.WindowSize)
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screen.Alpha = false
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sdl.ShowCursor(sdl.DISABLE)
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_ = window.UpdateSurface()
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lastSecond := time.Now()
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framesSinceLastSecond := 0
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targetFPS := 60
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frameDuration := time.Second / time.Duration(targetFPS)
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lastFrame := lastSecond
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running := true
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for running {
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for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
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switch event := event.(type) {
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case sdl.QuitEvent:
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running = false
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break
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case sdl.MouseMotionEvent:
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bloob.MousePos.X = int(event.X) / settings.Scale
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bloob.MousePos.Y = int(event.Y) / settings.Scale
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break
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}
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}
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now := time.Now()
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delta := now.Sub(lastSecond)
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if delta.Seconds() >= 1.0 {
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fmt.Printf("FPS: %5d | mspf: %f\n", framesSinceLastSecond, 1000.0/float32(framesSinceLastSecond))
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framesSinceLastSecond = 0
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lastSecond = lastSecond.Add(time.Second)
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}
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delta2 := now.Sub(lastFrame)
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if delta2 >= frameDuration {
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game.Update(&bloob)
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game.Render(screen)
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if bloob.Cursor != nil {
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screen.Draw(bloob.Cursor, bloob.MousePos)
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}
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windowImage.DrawUpscale(screen)
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framesSinceLastSecond += 1
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lastFrame = lastFrame.Add(frameDuration)
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}
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_ = window.UpdateSurface()
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}
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}
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