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(AkbFormat): reading moved to a separate class AkbReader.

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This commit is contained in:
morkt 2015-11-29 01:53:31 +04:00
parent 3b5d19fa98
commit 91ef658397
1 changed files with 61 additions and 36 deletions
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97
ArcFormats/Silky/ImageAKB.cs
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@ -69,16 +69,44 @@ namespace GameRes.Formats.Silky
public override ImageData Read (Stream stream, ImageMetaData info) public override ImageData Read (Stream stream, ImageMetaData info)
{ {
var meta = (AkbMetaData)info; var reader = new AkbReader (stream, (AkbMetaData)info);
int pixel_size = meta.BPP / 8; var image = reader.Unpack();
int stride = (int)meta.Width * pixel_size; return ImageData.Create (info, reader.Format, null, image, reader.Stride);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("AkbFormat.Write not implemented");
}
}
internal class AkbReader
{
Stream m_input;
AkbMetaData m_info;
int m_pixel_size;
public PixelFormat Format { get; private set; }
public int Stride { get; private set; }
public AkbReader (Stream input, AkbMetaData info)
{
m_input = input;
m_info = info;
m_pixel_size = m_info.BPP / 8;
Stride = (int)m_info.Width * m_pixel_size;
Format = 24 == m_info.BPP ? PixelFormats.Bgr24 : PixelFormats.Bgra32;
}
public byte[] Unpack ()
{
byte[] image; byte[] image;
if (meta.InnerWidth != 0 && meta.InnerHeight != 0) if (m_info.InnerWidth != 0 && m_info.InnerHeight != 0)
{ {
stream.Position = 0x20; m_input.Position = 0x20;
int inner_stride = meta.InnerWidth * pixel_size; int inner_stride = m_info.InnerWidth * m_pixel_size;
var pixels = new byte[meta.InnerHeight * inner_stride]; var pixels = new byte[m_info.InnerHeight * inner_stride];
using (var lz = new LzssStream (stream, LzssMode.Decompress, true)) using (var lz = new LzssStream (m_input, LzssMode.Decompress, true))
{ {
for (int dst = pixels.Length - inner_stride; dst >= 0; dst -= inner_stride) for (int dst = pixels.Length - inner_stride; dst >= 0; dst -= inner_stride)
{ {
@ -86,21 +114,16 @@ namespace GameRes.Formats.Silky
throw new InvalidFormatException(); throw new InvalidFormatException();
} }
} }
int src = 0; RestoreDelta (pixels, inner_stride);
for (int i = pixel_size; i < inner_stride; ++i) if (m_info.InnerWidth != m_info.Width || m_info.InnerHeight != m_info.Height)
pixels[i] += pixels[src++];
src = 0;
for (int i = inner_stride; i < pixels.Length; ++i)
pixels[i] += pixels[src++];
if (meta.InnerWidth != meta.Width || meta.InnerHeight != meta.Height)
{ {
image = CreateBackground (meta); image = CreateBackground();
src = 0; int src = 0;
int dst = meta.OffsetY * stride + meta.OffsetX * pixel_size; int dst = m_info.OffsetY * Stride + m_info.OffsetX * m_pixel_size;
for (int y = 0; y < meta.InnerHeight; ++y) for (int y = 0; y < m_info.InnerHeight; ++y)
{ {
Buffer.BlockCopy (pixels, src, image, dst, inner_stride); Buffer.BlockCopy (pixels, src, image, dst, inner_stride);
dst += stride; dst += Stride;
src += inner_stride; src += inner_stride;
} }
} }
@ -111,29 +134,31 @@ namespace GameRes.Formats.Silky
} }
else else
{ {
image = CreateBackground (meta); image = CreateBackground();
} }
var format = 24 == meta.BPP ? PixelFormats.Bgr24 : PixelFormats.Bgra32; return image;
return ImageData.Create (info, format, null, image, stride);
} }
private byte[] CreateBackground (AkbMetaData info) private void RestoreDelta (byte[] pixels, int stride)
{ {
int pixel_size = info.BPP / 8; int src = 0;
int stride = (int)info.Width * pixel_size; for (int i = m_pixel_size; i < stride; ++i)
var pixels = new byte[stride * (int)info.Height]; pixels[i] += pixels[src++];
if (0 != LittleEndian.ToInt32 (info.Background, 0)) src = 0;
for (int i = stride; i < pixels.Length; ++i)
pixels[i] += pixels[src++];
}
private byte[] CreateBackground ()
{
var pixels = new byte[Stride * (int)m_info.Height];
if (0 != LittleEndian.ToInt32 (m_info.Background, 0))
{ {
for (int i = 0; i < stride; i += pixel_size) for (int i = 0; i < Stride; i += m_pixel_size)
Buffer.BlockCopy (info.Background, 0, pixels, i, pixel_size); Buffer.BlockCopy (m_info.Background, 0, pixels, i, m_pixel_size);
Binary.CopyOverlapped (pixels, 0, stride, pixels.Length-stride); Binary.CopyOverlapped (pixels, 0, Stride, pixels.Length-Stride);
} }
return pixels; return pixels;
} }
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("AkbFormat.Write not implemented");
}
} }
} }