Messing around

main.go

@@ -5,78 +5,123 @@ import (
 	"log"
 	"runtime"
 
-	"gb-player/gb"
-
-	"github.com/AllenDang/cimgui-go/backend"
-	"github.com/AllenDang/cimgui-go/backend/sdlbackend"
-	"github.com/AllenDang/cimgui-go/imgui"
+	"github.com/veandco/go-sdl2/sdl"
+	"github.com/veandco/go-sdl2/ttf"
 )
 
-var currentBackend backend.Backend[sdlbackend.SDLWindowFlags]
+var renderer *sdl.Renderer
+var font *ttf.Font
 
 func init() {
 	runtime.LockOSThread()
 }
 
-func showDebugWindow() {
-	imgui.Text(fmt.Sprintf("Framerate: %.1f FPS", imgui.CurrentIO().Framerate()))
-}
-
-func showROMWindow(cartridge *gb.Cartridge) {
-	imgui.Begin("ROM")
-
-	imgui.Text(fmt.Sprintf("Title: %s", cartridge.Title))
-	imgui.Text(fmt.Sprintf("Mapper: %s", cartridge.Mapper))
-	imgui.Text(fmt.Sprintf("Licensee: %s", cartridge.Licensee))
-	if cartridge.SGBSupport {
-		imgui.Text("Super Game Boy support?: Yes")
-	} else {
-		imgui.Text("Super Game Boy support?: No")
-	}
-	imgui.Text(fmt.Sprintf("ROM size: %d bytes", cartridge.ROMSize))
-	imgui.Text(fmt.Sprintf("RAM size: %s", cartridge.RAMSize))
-	imgui.Text(fmt.Sprintf("Publication: %s", cartridge.Destination))
-	imgui.Text(fmt.Sprintf("ROM version: %d", cartridge.Version))
-
-	imgui.End()
-}
-
-func showCPUWindow(cpu *gb.Cpu) {
-	imgui.Begin("CPU")
-
-	imgui.Text(fmt.Sprintf("PC: %d", cpu.PC))
-
-	imgui.End()
-}
-
 func main() {
-	currentBackend, err := backend.CreateBackend(sdlbackend.NewSDLBackend())
+	if err := sdl.Init(sdl.INIT_EVERYTHING); err != nil {
+		log.Fatal(err)
+	}
+	defer sdl.Quit()
+
+	if err := ttf.Init(); err != nil {
+		log.Fatal((err))
+	}
+	defer ttf.Quit()
+
+	window, err := sdl.CreateWindow(
+		"GB Player",
+		sdl.WINDOWPOS_UNDEFINED,
+		sdl.WINDOWPOS_UNDEFINED,
+		800, 600,
+		sdl.WINDOW_SHOWN)
+	if err != nil {
+		panic(err)
+	}
+	defer window.Destroy()
+
+	renderer, err = sdl.CreateRenderer(window, -1, 0)
+	if err != nil {
+		panic(err)
+	}
+	defer renderer.Destroy()
+	renderer.RenderSetVSync(true)
+
+	font, err = ttf.OpenFont("SourceCodePro.ttf", 18)
 	if err != nil {
 		log.Fatal(err)
 	}
+	defer font.Close()
+	font.SetStyle(ttf.STYLE_BOLD)
 
-	currentBackend.SetBgColor(imgui.NewVec4(0.45, 0.55, 0.6, 1.0))
+	var fps float64
+	var frameCount uint32
+	var startTicks = sdl.GetTicks64()
+	var now uint64
+	var last uint64
 
-	currentBackend.CreateWindow("GB Player", 1200, 900)
+	cartridge := Insert("rom.gb")
+	fmt.Println(cartridge)
 
-	currentBackend.SetDropCallback(func(p []string) {
-		fmt.Printf("drop triggered: %v", p)
-	})
+	running := true
+	for running {
+		for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
+			switch event.(type) {
+			case *sdl.QuitEvent:
+				println("Quit")
+				running = false
+			}
+		}
 
-	currentBackend.SetCloseCallback(func() {
-		fmt.Println("window is closing")
-	})
+		last = now
+		now = sdl.GetPerformanceCounter()
+		deltaTime := float64((now - last) * 1000.0 / sdl.GetPerformanceFrequency())
+		_ = deltaTime
 
-	cartridge := gb.Insert("rom.gb")
-	cpu := gb.Reset()
+		// Clear screen
+		renderer.SetDrawColor(0x63, 0x94, 0xED, 0xff)
+		renderer.Clear()
 
-	currentBackend.Run(func() {
-		imgui.ClearSizeCallbackPool()
+		// Update state
+		rect := sdl.Rect{X: 100, Y: 100, W: 200, H: 150}
+		renderer.SetDrawColor(0, 0, 255, 255)
+		renderer.FillRect(&rect)
 
-		gb.Tick(&cpu)
+		drawDebugWindow(fps)
 
-		showDebugWindow()
-		showROMWindow(&cartridge)
-		showCPUWindow(&cpu)
-	})
+		// Present to screen
+		renderer.Present()
+
+		// Calculate framerate
+		frameCount++
+		currentTicks := sdl.GetTicks64()
+		elapsed := currentTicks - startTicks
+
+		if elapsed >= 1000 {
+			fps = float64(frameCount) / (float64(elapsed) / 1000.0)
+
+			// Reset counters
+			frameCount = 0
+			startTicks = currentTicks
+		}
+	}
+}
+
+func drawDebugWindow(fps float64) {
+	var textSurface *sdl.Surface
+	var textTexture *sdl.Texture
+
+	// FPS
+	textSurface, err := font.RenderUTF8Blended(fmt.Sprintf("FPS: %.2f", fps), sdl.Color{R: 0, G: 0, B: 0, A: 255})
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer textSurface.Free()
+
+	textTexture, err = renderer.CreateTextureFromSurface(textSurface)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer textTexture.Destroy()
+
+	textRect := sdl.Rect{X: 0, Y: 0, W: textSurface.W, H: textSurface.H}
+	renderer.Copy(textTexture, nil, &textRect)
 }