m/gb-player
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Messing around

Browse Source
This commit is contained in:
Michael Smith 2025-08-06 18:44:00 +02:00
parent 70c0b4aee5
commit 5a5e1feae5
7 changed files with 111 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

BIN
SourceCodePro.ttf Normal file
View File

Binary file not shown.

9
gb/cartridge.go → cartridge.go
View File

@ -1,4 +1,4 @@
package gb
package main
import (
"bytes"
@ -282,11 +282,12 @@ func Insert(filename string) Cartridge {
cartridge.SGBSupport = (header.SGBFlag == 0x03)
cartridge.ROMSize = 32 * (1 << header.ROMSize)
cartridge.RAMSize = ramSizes[header.RAMSize]
if header.DestinationCode == 0x00 {
switch header.DestinationCode {
case 0x00:
cartridge.Destination = "Japan (and possibly overseas)"
} else if header.DestinationCode == 0x01 {
case 0x01:
cartridge.Destination = "Overseas only"
} else {
default:
cartridge.Destination = "UNKNOWN"
}
cartridge.Version = int(header.MaskROMVersionNumber)

2
gb/cartridge_test.go → cartridge_test.go
View File

@ -1,4 +1,4 @@
package gb
package main
import (
"testing"

2
gb/cpu.go → cpu.go
View File

@ -1,4 +1,4 @@
package gb
package main
type Cpu struct {
A uint8

6
go.mod
View File

@ -2,13 +2,11 @@ module gb-player
go 1.24.5
require (
github.com/AllenDang/cimgui-go v1.3.1
github.com/stretchr/testify v1.10.0
)
require github.com/stretchr/testify v1.10.0
require (
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/veandco/go-sdl2 v0.4.40
gopkg.in/yaml.v3 v3.0.1 // indirect
)

4
go.sum
View File

@ -1,11 +1,11 @@
github.com/AllenDang/cimgui-go v1.3.1 h1:2f33a7GHJwRofH0CRQbUTXywazfph/K5LQLKyOBv24k=
github.com/AllenDang/cimgui-go v1.3.1/go.mod h1:Fuj3G2E3zd2bMQxmhuSPSFFl41MwS+MhyZ6DHgYq/YM=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
github.com/veandco/go-sdl2 v0.4.40 h1:fZv6wC3zz1Xt167P09gazawnpa0KY5LM7JAvKpX9d/U=
github.com/veandco/go-sdl2 v0.4.40/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

155
main.go
View File

@ -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)
}