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(MOE): support 8bpp images.

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This commit is contained in:
morkt 2017-12-29 01:13:19 +04:00
parent bb4e6ea7b4
commit 884c7acc85
1 changed files with 32 additions and 12 deletions
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42
ArcFormats/Ivory/ImageMOE.cs
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@ -23,9 +23,11 @@
// IN THE SOFTWARE.
//
using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Ivory
@ -37,6 +39,11 @@ namespace GameRes.Formats.Ivory
public override string Description { get { return "Ivory image format"; } }
public override uint Signature { get { return 0; } }
public MoeFormat ()
{
Extensions = new string[] { "moe", "shw" };
}
public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
var wh = stream.Signature;
@ -44,16 +51,18 @@ namespace GameRes.Formats.Ivory
uint height = wh >> 16;
if (0 == width || width > 800 || 0 == height || height > 600)
return null;
int bpp = stream.Name.HasExtension (".SHW") ? 8 : 24;
stream.Position = 4;
if (!IsValidInput (stream.AsStream, width, height))
if (!IsValidInput (stream.AsStream, width, height, bpp / 8))
return null;
return new ImageMetaData { Width = width, Height = height, BPP = 24 };
return new ImageMetaData { Width = width, Height = height, BPP = bpp };
}
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
stream.Position = 4;
var pixels = new byte[3 * info.Width * info.Height];
int pixel_size = info.BPP / 8;
var pixels = new byte[pixel_size * (int)info.Width * (int)info.Height];
int dst = 0;
while (dst < pixels.Length)
{
@ -62,25 +71,36 @@ namespace GameRes.Formats.Ivory
throw new EndOfStreamException();
if (0 != (count & 0x80))
{
count = 3 * (count & 0x7F);
count = Math.Min (pixel_size * (count & 0x7F), pixels.Length - dst);
stream.Read (pixels, dst, count);
dst += count;
}
else
{
count *= 3;
stream.Read (pixels, dst, 3);
Binary.CopyOverlapped (pixels, dst, dst+3, count-3);
count *= pixel_size;
stream.Read (pixels, dst, pixel_size);
Binary.CopyOverlapped (pixels, dst, dst+pixel_size, count-pixel_size);
dst += count;
}
}
if (24 == info.BPP)
return ImageData.Create (info, PixelFormats.Bgr24, null, pixels);
const int MaxAlpha = 0x10;
var colors = new Color[MaxAlpha+1];
for (int i = 0; i <= MaxAlpha; ++i)
{
byte g = (byte)(i * 0xFF / MaxAlpha);
colors[i] = Color.FromRgb (g, g, g);
}
var palette = new BitmapPalette (colors);
return ImageData.Create (info, PixelFormats.Indexed8, palette, pixels);
}
/// <summary>
/// Try to interpret input stream as a compressed image.
/// </summary>
bool IsValidInput (Stream input, uint width, uint height)
bool IsValidInput (Stream input, uint width, uint height, int pixel_size)
{
int total = (int)width * (int)height;
int dst = 0;
@ -91,12 +111,12 @@ namespace GameRes.Formats.Ivory
return false;
if (0 != (count & 0x80))
{
count &= 0x7F;
input.Seek (count * 3, SeekOrigin.Current);
count = Math.Min (count & 0x7F, total - dst);
input.Seek (count * pixel_size, SeekOrigin.Current);
}
else
{
input.Seek (3, SeekOrigin.Current);
input.Seek (pixel_size, SeekOrigin.Current);
}
dst += count;
if (dst > total)