// NewImage will create a new texture for this image and return the *Image. If the
// file does not exist or cannot be decoded it will return an error.
func NewImage(path string) (*Image, error) {
//we do this first time to check the image before volitile load
imgFile, new_err := file.NewFile(path)
defer imgFile.Close()
if new_err != nil {
return nil, new_err
}
decoded_img, _, img_err := image.Decode(imgFile)
if img_err != nil {
return nil, img_err
}
bounds := decoded_img.Bounds()
new_image := &Image{
filePath: path,
mipmaps: false,
Texture: &Texture{
Width: int32(bounds.Dx()),
Height: int32(bounds.Dy()),
},
}
registerVolatile(new_image)
return new_image, nil
}
// Decode will get the file at the path provided. It will then send it to the decoder
// that will handle its file type by the extention on the path. Supported formats
// are wav, ogg, and flac. If there is an error retrieving the file or decoding it,
// will return that error.
func Decode(filepath string) (Decoder, error) {
src, err := file.NewFile(filepath)
if err != nil {
return nil, err
}
base := decoderBase{
src: src,
src_path: filepath,
}
var decoder Decoder
switch file.Ext(filepath) {
case ".wav":
decoder = &waveDecoder{decoderBase: base}
case ".ogg":
decoder = &vorbisDecoder{decoderBase: base}
case ".flac":
decoder = &flacDecoder{decoderBase: base}
default:
src.Close()
return nil, errors.New("unsupported audio file extention")
}
if err = decoder.read(); err != nil {
src.Close()
return nil, err
}
return decoder, nil
}
func (rast *imageFontRasterizer) loadVolatile() bool {
glyph_rune_hints := []rune(rast.glyph_hints)
imgFile, err := file.NewFile(rast.filepath)
if err != nil {
return false
}
defer imgFile.Close()
img, _, err := image.Decode(imgFile)
if err != nil {
return false
}
rast.glyphs = make(map[rune]glyphData)
glyphsPerRow := int32(16)
glyphsPerCol := (int32(len(glyph_rune_hints)) / glyphsPerRow) + 1
rast.advance = img.Bounds().Dx() / len(glyph_rune_hints)
rast.height = img.Bounds().Dy()
rast.ascent = rast.height
rast.descent = 0
image_width := pow2(uint32(int32(rast.advance) * glyphsPerRow))
image_height := pow2(uint32(int32(rast.height) * glyphsPerCol))
rgba := image.NewRGBA(image.Rect(0, 0, int(image_width), int(image_height)))
var gx, gy int
for i := 0; i < len(glyph_rune_hints); i++ {
dst_rec := image.Rect(gx, gy, gx+rast.advance, gy+rast.height)
draw.Draw(rgba, dst_rec, img, image.Pt(i*rast.advance, 0), draw.Src)
rast.glyphs[glyph_rune_hints[i]] = glyphData{
rec: NewQuad(int32(gx), int32(gy), int32(rast.advance), int32(rast.height), int32(image_width), int32(image_height)),
leftSideBearing: 0,
advanceWidth: rast.advance,
topSideBearing: 0,
advanceHeight: rast.height + 5,
ascent: rast.height,
descent: 0,
}
if i%16 == 0 {
gx = 0
gy += rast.height
} else {
gx += rast.advance
}
}
rast.Texture, err = newImageTexture(rgba, false)
return err == nil
}
// loadConfig will find the config file (works with bundle) and load it into the
// struct and the return it. If the config does not exist it will return a default
// config. If there was an issue reading the file it will return the error, possibly
// permission errors.
func loadConfig() (*windowConfig, error) {
var config windowConfig
path := path.Join(".", config_file_name)
if _, err := file.NewFileData(path); os.IsNotExist(err) {
return &config, nil //no added config bail out early
}
config_file, file_err := file.NewFile(config_file_name)
if file_err != nil {
return nil, file_err
}
if _, err := toml.DecodeReader(config_file, &config); err != nil {
return nil, err
}
return &config, nil
}
// loadVolatile will create the volatile objects
func (img *Image) loadVolatile() bool {
imgFile, new_err := file.NewFile(img.filePath)
defer imgFile.Close()
if new_err != nil {
return false
}
decoded_img, _, img_err := image.Decode(imgFile)
if img_err != nil {
return false
}
img.Texture, img_err = newImageTexture(decoded_img, img.mipmaps)
if img_err != nil {
return false
}
return true
}