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Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type Chunk ¶
type Chunk struct {
Length uint32 // chunk data length
CType string // chunk type
Data []byte // chunk data
Crc32 uint32 // CRC32 of chunk data
// contains filtered or unexported fields
}
Each chunk starts with a uint32 length (big endian), then 4 byte name, then data and finally the CRC32 of the chunk data.
type IpaPNG ¶
type IpaPNG struct {
Img image.Image
IsCgBI bool
CompressionMethod uint32
FilterMethod uint32
IDAT []byte
// contains filtered or unexported fields
}
func Decode ¶
func Decode(r io.ReadSeeker) (*IpaPNG, error)
Decode reads a PNG image from r and returns it as an image.Image. The type of Image returned depends on the PNG contents.
func (IpaPNG) PrintChunks ¶
PrintChunks will return a string containign chunk number, name and the first 20 bytes of each chunk.
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