138 lines
3.3 KiB
Go
138 lines
3.3 KiB
Go
package dcc
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"fmt"
|
|
"io"
|
|
|
|
"github.com/FooSoft/lazarus/streaming"
|
|
)
|
|
|
|
type Sprite struct {
|
|
}
|
|
|
|
type extents struct {
|
|
x1 int32
|
|
y1 int32
|
|
x2 int32
|
|
y2 int32
|
|
}
|
|
|
|
type fileHeader struct {
|
|
Signature uint8
|
|
Version uint8
|
|
DirCount uint8
|
|
FramesPerDir uint32
|
|
Tag uint32
|
|
FinalDc6Size uint32
|
|
}
|
|
|
|
type directionHeader struct {
|
|
CodedSize uint32
|
|
HasRawPixelEncoding bool
|
|
CompressEqualCells bool
|
|
Variable0Bits uint8
|
|
WidthBits uint8
|
|
HeightBits uint8
|
|
OffsetXBits uint8
|
|
OffsetYBits uint8
|
|
OptionalBytesBits uint8
|
|
CodedBytesBits uint8
|
|
}
|
|
|
|
type frameHeader struct {
|
|
Variable0 uint32
|
|
Width uint32
|
|
Height uint32
|
|
OffsetX int32
|
|
OffsetY int32
|
|
OptionalBytes uint32
|
|
CodedBytes uint32
|
|
FrameBottomUp bool
|
|
Extents extents
|
|
}
|
|
|
|
func NewFromReader(reader io.ReadSeeker) (*Sprite, error) {
|
|
var fileHead fileHeader
|
|
if err := binary.Read(reader, binary.LittleEndian, &fileHead); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for i := 0; i < int(fileHead.DirCount); i++ {
|
|
var offsetDir uint32
|
|
if err := binary.Read(reader, binary.LittleEndian, &offsetDir); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
offset, err := reader.Seek(0, io.SeekCurrent)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if _, err := reader.Seek(int64(offsetDir), io.SeekStart); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := readDirection(reader, fileHead); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if _, err := reader.Seek(offset, io.SeekStart); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
func readDirectionHeader(bitReader *streaming.BitReader) *directionHeader {
|
|
var dirHead directionHeader
|
|
|
|
dirHead.CodedSize = uint32(bitReader.ReadUint(32))
|
|
dirHead.HasRawPixelEncoding = bitReader.ReadBool()
|
|
dirHead.CompressEqualCells = bitReader.ReadBool()
|
|
dirHead.Variable0Bits = uint8(bitReader.ReadUint(4))
|
|
dirHead.WidthBits = uint8(bitReader.ReadUint(4))
|
|
dirHead.HeightBits = uint8(bitReader.ReadUint(4))
|
|
dirHead.OffsetXBits = uint8(bitReader.ReadInt(4))
|
|
dirHead.OffsetYBits = uint8(bitReader.ReadInt(4))
|
|
dirHead.OptionalBytesBits = uint8(bitReader.ReadUint(4))
|
|
dirHead.CodedBytesBits = uint8(bitReader.ReadUint(4))
|
|
|
|
return &dirHead
|
|
}
|
|
|
|
func readFrameHeader(bitReader *streaming.BitReader, dirHead directionHeader) *frameHeader {
|
|
var frameHead frameHeader
|
|
|
|
frameHead.Variable0 = uint32(bitReader.ReadUintPacked(int(dirHead.Variable0Bits)))
|
|
frameHead.Width = uint32(bitReader.ReadUintPacked(int(dirHead.WidthBits)))
|
|
frameHead.Height = uint32(bitReader.ReadUintPacked(int(dirHead.HeightBits)))
|
|
frameHead.OffsetX = int32(bitReader.ReadIntPacked(int(dirHead.OffsetXBits)))
|
|
frameHead.OffsetY = int32(bitReader.ReadIntPacked(int(dirHead.OffsetYBits)))
|
|
frameHead.OptionalBytes = uint32(bitReader.ReadUintPacked(int(dirHead.OptionalBytesBits)))
|
|
frameHead.CodedBytes = uint32(bitReader.ReadUintPacked(int(dirHead.CodedBytesBits)))
|
|
frameHead.FrameBottomUp = bitReader.ReadBool()
|
|
|
|
return &frameHead
|
|
}
|
|
|
|
func readDirection(reader io.ReadSeeker, fileHead fileHeader) error {
|
|
bitReader := streaming.NewBitReader(reader)
|
|
|
|
dirHead := readDirectionHeader(bitReader)
|
|
if err := bitReader.Error(); err != nil {
|
|
return err
|
|
}
|
|
|
|
frameHead := readFrameHeader(bitReader, *dirHead)
|
|
if err := bitReader.Error(); err != nil {
|
|
return err
|
|
}
|
|
|
|
fmt.Printf("%+v\n", dirHead)
|
|
fmt.Printf("%+v\n", frameHead)
|
|
|
|
return nil
|
|
}
|