91 lines
2.2 KiB
Go
91 lines
2.2 KiB
Go
package dcc
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import (
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"io"
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"log"
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"github.com/FooSoft/lazarus/streaming"
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)
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type directionHeader struct {
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CodedSize uint32
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HasRawPixelEncoding bool
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CompressEqualCells bool
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Variable0Bits uint8
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WidthBits uint8
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HeightBits uint8
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OffsetXBits uint8
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OffsetYBits uint8
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OptionalBytesBits uint8
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CodedBytesBits uint8
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}
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func readDirectionHeader(bitReader *streaming.BitReader) (*directionHeader, error) {
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var dirHead directionHeader
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dirHead.CodedSize = uint32(bitReader.ReadUint(32))
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dirHead.HasRawPixelEncoding = bitReader.ReadBool()
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dirHead.CompressEqualCells = bitReader.ReadBool()
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dirHead.Variable0Bits = uint8(bitReader.ReadUint(4))
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dirHead.WidthBits = uint8(bitReader.ReadUint(4))
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dirHead.HeightBits = uint8(bitReader.ReadUint(4))
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dirHead.OffsetXBits = uint8(bitReader.ReadInt(4))
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dirHead.OffsetYBits = uint8(bitReader.ReadInt(4))
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dirHead.OptionalBytesBits = uint8(bitReader.ReadUint(4))
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dirHead.CodedBytesBits = uint8(bitReader.ReadUint(4))
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if err := bitReader.Error(); err != nil {
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return nil, err
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}
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return &dirHead, nil
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}
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func readDirection(reader io.ReadSeeker, fileHead fileHeader) (*direction, error) {
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bitReader := streaming.NewBitReader(reader)
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dirHead, err := readDirectionHeader(bitReader)
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if err != nil {
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return nil, err
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}
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frameHeads, dirBounds, err := readFrameHeaders(bitReader, fileHead, *dirHead)
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if err != nil {
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return nil, err
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}
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dirData := direction{bounds: dirBounds}
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for _, frameHead := range frameHeads {
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dirData.frames = append(dirData.frames, newFrame(frameHead, dirBounds))
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}
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var entries []pixelBufferEntry
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entries, err = dirData.decodeStage1(bitReader, entries)
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if err != nil {
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return nil, err
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}
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entries, err = dirData.decodeStage2(bitReader, entries)
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if err != nil {
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return nil, err
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}
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log.Println(dirData.bounds)
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return &dirData, nil
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}
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type direction struct {
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header directionHeader
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frames []frame
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bounds box
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}
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func (d *direction) decodeStage1(bitReader *streaming.BitReader, entries []pixelBufferEntry) ([]pixelBufferEntry, error) {
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return nil, nil
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}
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func (d *direction) decodeStage2(bitReader *streaming.BitReader, entries []pixelBufferEntry) ([]pixelBufferEntry, error) {
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return nil, nil
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}
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