lazarus/tools/viewer/viewer.go

183 lines
3.6 KiB
Go

package main
import (
"flag"
"fmt"
"os"
"path/filepath"
"time"
"github.com/FooSoft/lazarus/formats/dat"
"github.com/FooSoft/lazarus/formats/dc6"
"github.com/FooSoft/lazarus/graphics"
"github.com/FooSoft/lazarus/math"
"github.com/FooSoft/lazarus/platform"
"github.com/FooSoft/lazarus/platform/imgui"
)
func loadPalette(path string) (*dat.Palette, error) {
fp, err := os.Open(path)
if err != nil {
return nil, err
}
defer fp.Close()
return dat.NewFromReader(fp)
}
func loadAnimation(path string) (*dc6.Animation, error) {
fp, err := os.Open(path)
if err != nil {
return nil, err
}
defer fp.Close()
return dc6.NewFromReader(fp)
}
type scene struct {
animation *dc6.Animation
palette *dat.Palette
texture graphics.Texture
directionIndex int
frameIndex int
}
func (s *scene) Name() string {
return "viewer"
}
func (s *scene) Destroy() error {
if s.texture != nil {
return s.texture.Destroy()
}
return nil
}
func (s *scene) Advance() error {
var (
directionIndex = s.directionIndex
frameIndex = s.frameIndex
)
if s.texture == nil {
if err := s.updateTexture(); err != nil {
return err
}
}
imgui.SetNextWindowSize(math.Vec2i{X: 300, Y: 400})
imgui.Begin("DC6 Viewer")
imgui.Image(s.texture)
direction := s.animation.Directions[directionIndex]
if imgui.SliderInt("Direction", &directionIndex, 0, len(s.animation.Directions)-1) {
frameIndex = 0
}
frame := direction.Frames[frameIndex]
imgui.SliderInt("Frame", &frameIndex, 0, len(direction.Frames)-1)
imgui.Columns(2)
imgui.Text("Size")
imgui.NextColumn()
imgui.Text("%+v", frame.Size)
imgui.NextColumn()
imgui.Text("Offset")
imgui.NextColumn()
imgui.Text("%+v", frame.Offset)
imgui.End()
if directionIndex != s.directionIndex || frameIndex != s.frameIndex {
s.directionIndex = directionIndex
s.frameIndex = frameIndex
s.updateTexture()
}
return nil
}
func (s *scene) updateTexture() error {
frame := s.animation.Directions[s.directionIndex].Frames[s.frameIndex]
colors := make([]math.Color3b, frame.Size.X*frame.Size.Y)
for y := 0; y < frame.Size.Y; y++ {
for x := 0; x < frame.Size.X; x++ {
colors[y*frame.Size.X+x] = s.palette.Colors[frame.Data[y*frame.Size.X+x]]
}
}
if s.texture != nil {
if err := s.texture.Destroy(); err != nil {
return err
}
}
var err error
s.texture, err = platform.NewTextureFromRgb(colors, frame.Size)
if err != nil {
return err
}
return nil
}
func main() {
var (
palettePath = flag.String("palette", "", "path to palette file")
)
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s [options] file\n", filepath.Base(os.Args[0]))
fmt.Fprintf(os.Stderr, "Parameters:\n\n")
flag.PrintDefaults()
}
flag.Parse()
if flag.NArg() < 1 {
flag.Usage()
os.Exit(2)
}
if err := platform.Initialize(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
defer platform.Shutdown()
animation, err := loadAnimation(flag.Arg(0))
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
var palette *dat.Palette
if len(*palettePath) > 0 {
palette, err = loadPalette(*palettePath)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
} else {
palette = dat.NewFromGrayscale()
}
scene := &scene{animation: animation, palette: palette}
if err := platform.WindowCreate("Viewer", math.Vec2i{X: 1024, Y: 768}, scene); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
defer platform.WindowDestroy()
for {
run, err := platform.Advance()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if !run {
break
}
<-time.After(time.Millisecond * 25)
}
}