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migration to IBinaryStream interface.

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This commit is contained in:
morkt
2016-10-15 09:34:46 +04:00
parent 0b96ef8f77
commit 503b734645
16 changed files with 264 additions and 332 deletions
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132
GameRes/ImagePNG.cs
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@@ -41,11 +41,11 @@ namespace GameRes
public override uint Signature { get { return 0x474e5089; } }
public override bool CanWrite { get { return true; } }
public override ImageData Read (Stream file, ImageMetaData info)
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var decoder = new PngBitmapDecoder (file,
var decoder = new PngBitmapDecoder (file.AsStream,
BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
BitmapSource frame = decoder.Frames.First();
BitmapSource frame = decoder.Frames[0];
frame.Freeze();
return new ImageData (frame, info);
}
@@ -102,10 +102,10 @@ namespace GameRes
}
}
void SkipBytes (BinaryReader file, uint num)
void SkipBytes (IBinaryStream file, uint num)
{
if (file.BaseStream.CanSeek)
file.BaseStream.Seek (num, SeekOrigin.Current);
if (file.AsStream.CanSeek)
file.Seek (num, SeekOrigin.Current);
else
{
for (int i = 0; i < num / 4; ++i)
@@ -115,100 +115,72 @@ namespace GameRes
}
}
public override ImageMetaData ReadMetaData (Stream stream)
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
ImageMetaData meta = null;
var file = new ArcView.Reader (stream);
try
file.ReadUInt32();
if (file.ReadUInt32() != 0x0a1a0a0d)
return null;
uint chunk_size = Binary.BigEndian (file.ReadUInt32());
byte[] chunk_type = file.ReadBytes (4);
if (!Binary.AsciiEqual (chunk_type, "IHDR"))
return null;
var meta = new ImageMetaData();
meta.Width = Binary.BigEndian (file.ReadUInt32());
meta.Height = Binary.BigEndian (file.ReadUInt32());
int bpp = file.ReadByte();
int color_type = file.ReadByte();
switch (color_type)
{
file.ReadUInt32();
if (file.ReadUInt32() != 0x0a1a0a0d)
return null;
uint chunk_size = Binary.BigEndian (file.ReadUInt32());
char[] chunk_type = new char[4];
case 2: meta.BPP = bpp*3; break;
case 3: meta.BPP = 24; break;
case 4: meta.BPP = bpp*2; break;
case 6: meta.BPP = bpp*4; break;
default: meta.BPP = bpp; break;
}
SkipBytes (file, 7);
for (;;)
{
chunk_size = Binary.BigEndian (file.ReadUInt32());
file.Read (chunk_type, 0, 4);
if (!chunk_type.SequenceEqual ("IHDR"))
return null;
meta = new ImageMetaData();
meta.Width = Binary.BigEndian (file.ReadUInt32());
meta.Height = Binary.BigEndian (file.ReadUInt32());
int bpp = file.ReadByte();
int color_type = file.ReadByte();
switch (color_type)
if (Binary.AsciiEqual (chunk_type, "IDAT") || Binary.AsciiEqual (chunk_type, "IEND"))
break;
if (Binary.AsciiEqual (chunk_type, "oFFs"))
{
case 2: meta.BPP = bpp*3; break;
case 3: meta.BPP = 24; break;
case 4: meta.BPP = bpp*2; break;
case 6: meta.BPP = bpp*4; break;
default: meta.BPP = bpp; break;
}
SkipBytes (file, 7);
for (;;)
{
chunk_size = Binary.BigEndian (file.ReadUInt32());
file.Read (chunk_type, 0, 4);
if (chunk_type.SequenceEqual ("IDAT") || chunk_type.SequenceEqual ("IEND"))
break;
if (chunk_type.SequenceEqual ("oFFs"))
int x = Binary.BigEndian (file.ReadInt32());
int y = Binary.BigEndian (file.ReadInt32());
if (0 == file.ReadByte())
{
int x = Binary.BigEndian (file.ReadInt32());
int y = Binary.BigEndian (file.ReadInt32());
if (0 == file.ReadByte())
{
meta.OffsetX = x;
meta.OffsetY = y;
}
break;
meta.OffsetX = x;
meta.OffsetY = y;
}
SkipBytes (file, chunk_size+4);
break;
}
}
catch
{
meta = null;
}
finally
{
file.Dispose();
if (stream.CanSeek)
stream.Position = 0;
SkipBytes (file, chunk_size+4);
}
return meta;
}
public static long FindChunk (Stream stream, string chunk)
public static long FindChunk (IBinaryStream file, string chunk)
{
long found_offset = -1;
var file = new ArcView.Reader (stream);
try
{
char[] buf = new char[4];
file.BaseStream.Position = 8;
while (-1 != file.PeekChar())
var buf = new byte[4];
file.Position = 8;
while (-1 != file.PeekByte())
{
long chunk_offset = file.BaseStream.Position;
long chunk_offset = file.Position;
uint chunk_size = Binary.BigEndian (file.ReadUInt32());
if (4 != file.Read (buf, 0, 4))
break;
if (chunk.SequenceEqual (buf))
{
found_offset = chunk_offset;
break;
}
file.BaseStream.Position += chunk_size + 4;
if (Binary.AsciiEqual (buf, chunk))
return chunk_offset;
file.Position += chunk_size + 4;
}
}
catch
{
// ignore errors
}
finally
{
file.Dispose();
}
return found_offset;
catch { /* ignore errors */ }
return -1L;
}
}
}