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(ALP): support 8bpp bitmaps.

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This commit is contained in:
morkt 2018-09-02 09:34:26 +04:00
parent 6a404b6ea3
commit dfbdf31203
1 changed files with 42 additions and 4 deletions
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46
ArcFormats/NekoSDK/ImageALP.cs
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@ -27,6 +27,7 @@ using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
namespace GameRes.Formats.NekoSDK
{
@ -35,19 +36,32 @@ namespace GameRes.Formats.NekoSDK
{
public ImageData Read (IBinaryStream file, BmpMetaData info)
{
if (info.BPP != 24 && info.BPP != 32 || !file.CanSeek)
if (!file.CanSeek)
return null;
var alp_name = Path.ChangeExtension (info.FileName, "alp");
if (alp_name.Equals (info.FileName, StringComparison.InvariantCultureIgnoreCase)
|| !VFS.FileExists (alp_name))
return null;
var alpha_size = info.Width * info.Height;
int alp_stride = ((int)info.Width + 3) & -4;
int alpha_size = alp_stride * (int)info.Height;
var alpha = new byte[alpha_size];
using (var alp = VFS.OpenStream (alp_name))
{
if (alpha.Length != alp.Read (alpha, 0, alpha.Length) || alp.ReadByte() != -1)
alpha_size = alp.Read (alpha, 0, alpha.Length);
if (alp.ReadByte() != -1)
return null;
if (alpha_size != alpha.Length)
{
if (alp_stride == (int)info.Width)
return null;
alp_stride = (int)info.Width;
if (alpha_size != alp_stride * (int)info.Height)
return null;
}
}
if (info.BPP != 24 && info.BPP != 32)
return ReadBmp (file, info, alpha, alp_stride);
file.Position = info.ImageOffset;
int dst_stride = (int)info.Width * 4;
int gap = -((int)info.Width * info.BPP / 8) & 3;
@ -56,7 +70,7 @@ namespace GameRes.Formats.NekoSDK
int dst = (int)(info.Height-1) * dst_stride;
for (int y = (int)info.Height-1; y >= 0; --y)
{
int a_src = (int)info.Width * y;
int a_src = alp_stride * y;
for (int x = 0; x < dst_stride; x += 4)
{
file.Read (pixels, dst+x, src_pixel_size);
@ -68,5 +82,29 @@ namespace GameRes.Formats.NekoSDK
}
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, dst_stride);
}
public ImageData ReadBmp (IBinaryStream file, BmpMetaData info, byte[] alpha, int alp_stride)
{
var decoder = new BmpBitmapDecoder (file.AsStream,
BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
BitmapSource bitmap = decoder.Frames[0];
bitmap = new FormatConvertedBitmap (bitmap, PixelFormats.Bgr32, null, 0);
int dst_stride = (int)info.Width * 4;
var pixels = new byte[(int)info.Height * dst_stride];
bitmap.CopyPixels (pixels, dst_stride, 0);
int dst = 0;
int src = 0;
for (int y = (int)info.Height; y > 0; --y)
{
int a_src = src;
for (int x = 3; x < dst_stride; x += 4)
{
pixels[dst+x] = alpha[a_src++];
}
dst += dst_stride;
src += alp_stride;
}
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, dst_stride);
}
}
}