SDL2 version

main.go

@@ -2,9 +2,18 @@ package main
 
 import (
 	"fmt"
+	"log"
+	"runtime"
+
 	"gb-player/gb"
+
+	"github.com/veandco/go-sdl2/sdl"
 )
 
+func init() {
+	runtime.LockOSThread()
+}
+
 func main() {
 	cartridge := gb.Insert("rom.gb")
 	fmt.Println("Title:", cartridge.Title)
@@ -15,4 +24,68 @@ func main() {
 	fmt.Println("RAM size:", cartridge.RAMSize)
 	fmt.Println("Publication destination:", cartridge.Destination)
 	fmt.Println("ROM version:", cartridge.Version)
+	fmt.Println()
+
+	cpu := gb.Reset()
+	fmt.Println("Program counter:", cpu.PC)
+	gb.Tick(&cpu)
+	fmt.Println("Program counter:", cpu.PC)
+
+	if err := sdl.Init(sdl.INIT_EVERYTHING); err != nil {
+		log.Fatal(err)
+	}
+	defer sdl.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)
+	renderer.SetDrawColor(0x63, 0x94, 0xED, 0xff)
+
+	var frameCount uint32 = 0
+	var startTicks = sdl.GetTicks()
+
+	running := true
+	for running {
+		// frameStartTime := sdl.GetTicks()
+
+		for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
+			switch event.(type) {
+			case *sdl.QuitEvent:
+				println("Quit")
+				running = false
+				break
+			}
+		}
+
+		renderer.Clear()
+		renderer.Present()
+
+		// Calculate framerate
+		frameCount++
+		currentTicks := sdl.GetTicks()
+		elapsed := currentTicks - startTicks
+		if elapsed >= 1000 {
+			fps := float32(frameCount) / (float32(elapsed) / 1000.0)
+            fmt.Printf("FPS: %.2f\n", fps)
+
+            // Reset counters
+            frameCount = 0
+            startTicks = currentTicks
+		}
+	}
 }