func createIconButton(driver gxui.Driver, theme gxui.Theme, iconPath string) gxui.Button {
button := theme.CreateButton()
button.SetType(gxui.PushButton)
fileBytes, err := assets.Asset(iconPath)
if err != nil {
log.Printf("Error: Failed to read asset %s: %s", iconPath, err)
return button
}
f := bytes.NewBuffer(fileBytes)
src, _, err := image.Decode(f)
if err != nil {
log.Printf("Error: Failed to decode image %s: %s", iconPath, err)
return button
}
src = resize.Resize(24, 24, src, resize.Bilinear)
rgba := image.NewRGBA(src.Bounds())
draw.Draw(rgba, src.Bounds(), src, image.ZP, draw.Src)
texture := driver.CreateTexture(rgba, 1)
icon := theme.CreateImage()
icon.SetTexture(texture)
button.AddChild(icon)
return button
}
func appMain(driver gxui.Driver) {
args := flag.Args()
if len(args) != 1 {
fmt.Print("usage: image_viewer image-path\n")
os.Exit(1)
}
file := args[0]
f, err := os.Open(file)
if err != nil {
fmt.Printf("Failed to open image '%s': %v\n", file, err)
os.Exit(1)
}
source, _, err := image.Decode(f)
if err != nil {
fmt.Printf("Failed to read image '%s': %v\n", file, err)
os.Exit(1)
}
theme := flags.CreateTheme(driver)
img := theme.CreateImage()
mx := source.Bounds().Max
window := theme.CreateWindow(mx.X, mx.Y, "Image viewer")
window.SetScale(flags.DefaultScaleFactor)
window.AddChild(img)
// Copy the image to a RGBA format before handing to a gxui.Texture
rgba := image.NewRGBA(source.Bounds())
draw.Draw(rgba, source.Bounds(), source, image.ZP, draw.Src)
texture := driver.CreateTexture(rgba, 1)
img.SetTexture(texture)
window.OnClose(driver.Terminate)
}