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package matchers
import "github.com/h2non/filetype/matchers/isobmff"
var (
TypeJpeg = newType("jpg", "image/jpeg")
TypeJpeg2000 = newType("jp2", "image/jp2")
TypePng = newType("png", "image/png")
TypeGif = newType("gif", "image/gif")
TypeWebp = newType("webp", "image/webp")
TypeCR2 = newType("cr2", "image/x-canon-cr2")
TypeTiff = newType("tif", "image/tiff")
TypeBmp = newType("bmp", "image/bmp")
TypeJxr = newType("jxr", "image/vnd.ms-photo")
TypePsd = newType("psd", "image/vnd.adobe.photoshop")
TypeIco = newType("ico", "image/vnd.microsoft.icon")
TypeHeif = newType("heif", "image/heif")
TypeDwg = newType("dwg", "image/vnd.dwg")
)
var Image = Map{
TypeJpeg: Jpeg,
TypeJpeg2000: Jpeg2000,
TypePng: Png,
TypeGif: Gif,
TypeWebp: Webp,
TypeCR2: CR2,
TypeTiff: Tiff,
TypeBmp: Bmp,
TypeJxr: Jxr,
TypePsd: Psd,
TypeIco: Ico,
TypeHeif: Heif,
TypeDwg: Dwg,
}
func Jpeg(buf []byte) bool {
return len(buf) > 2 &&
buf[0] == 0xFF &&
buf[1] == 0xD8 &&
buf[2] == 0xFF
}
func Jpeg2000(buf []byte) bool {
return len(buf) > 12 &&
buf[0] == 0x0 &&
buf[1] == 0x0 &&
buf[2] == 0x0 &&
buf[3] == 0xC &&
buf[4] == 0x6A &&
buf[5] == 0x50 &&
buf[6] == 0x20 &&
buf[7] == 0x20 &&
buf[8] == 0xD &&
buf[9] == 0xA &&
buf[10] == 0x87 &&
buf[11] == 0xA &&
buf[12] == 0x0
}
func Png(buf []byte) bool {
return len(buf) > 3 &&
buf[0] == 0x89 && buf[1] == 0x50 &&
buf[2] == 0x4E && buf[3] == 0x47
}
func Gif(buf []byte) bool {
return len(buf) > 2 &&
buf[0] == 0x47 && buf[1] == 0x49 && buf[2] == 0x46
}
func Webp(buf []byte) bool {
return len(buf) > 11 &&
buf[8] == 0x57 && buf[9] == 0x45 &&
buf[10] == 0x42 && buf[11] == 0x50
}
func CR2(buf []byte) bool {
return len(buf) > 10 &&
((buf[0] == 0x49 && buf[1] == 0x49 && buf[2] == 0x2A && buf[3] == 0x0) || // Little Endian
(buf[0] == 0x4D && buf[1] == 0x4D && buf[2] == 0x0 && buf[3] == 0x2A)) && // Big Endian
buf[8] == 0x43 && buf[9] == 0x52 && // CR2 magic word
buf[10] == 0x02 // CR2 major version
}
func Tiff(buf []byte) bool {
return len(buf) > 10 &&
((buf[0] == 0x49 && buf[1] == 0x49 && buf[2] == 0x2A && buf[3] == 0x0) || // Little Endian
(buf[0] == 0x4D && buf[1] == 0x4D && buf[2] == 0x0 && buf[3] == 0x2A)) && // Big Endian
!CR2(buf) // To avoid conflicts differentiate Tiff from CR2
}
func Bmp(buf []byte) bool {
return len(buf) > 1 &&
buf[0] == 0x42 &&
buf[1] == 0x4D
}
func Jxr(buf []byte) bool {
return len(buf) > 2 &&
buf[0] == 0x49 &&
buf[1] == 0x49 &&
buf[2] == 0xBC
}
func Psd(buf []byte) bool {
return len(buf) > 3 &&
buf[0] == 0x38 && buf[1] == 0x42 &&
buf[2] == 0x50 && buf[3] == 0x53
}
func Ico(buf []byte) bool {
return len(buf) > 3 &&
buf[0] == 0x00 && buf[1] == 0x00 &&
buf[2] == 0x01 && buf[3] == 0x00
}
func Heif(buf []byte) bool {
if !isobmff.IsISOBMFF(buf) {
return false
}
majorBrand, _, compatibleBrands := isobmff.GetFtyp(buf)
if majorBrand == "heic" {
return true
}
if majorBrand == "mif1" || majorBrand == "msf1" {
for _, compatibleBrand := range compatibleBrands {
if compatibleBrand == "heic" {
return true
}
}
}
return false
}
func Dwg(buf []byte) bool {
return len(buf) > 3 &&
buf[0] == 0x41 && buf[1] == 0x43 &&
buf[2] == 0x31 && buf[3] == 0x30
}
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