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implemented color-mapped images.

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This commit is contained in:
morkt 2015-07-14 21:22:08 +04:00
parent 5907b0ad5c
commit e42d82712c
1 changed files with 30 additions and 5 deletions
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35
GameRes/ImageTGA.cs
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@ -58,7 +58,8 @@ namespace GameRes
throw new System.ArgumentException ("TgaFormat.Read should be supplied with TgaMetaData", "metadata");
var reader = new Reader (stream, meta);
var pixels = reader.Unpack();
var bitmap = BitmapSource.Create ((int)meta.Width, (int)meta.Height, 96, 96,
var bitmap = BitmapSource.Create ((int)meta.Width, (int)meta.Height,
ImageData.DefaultDpiX, ImageData.DefaultDpiY,
reader.Format, reader.Palette, pixels, reader.Stride);
bitmap.Freeze();
return new ImageData (bitmap, meta);
@ -195,7 +196,7 @@ namespace GameRes
switch (meta.BPP)
{
default: throw new InvalidFormatException();
case 8: throw new NotImplementedException();
case 8: Format = PixelFormats.Indexed8; break;
case 15: Format = PixelFormats.Bgr555; break;
case 16: Format = PixelFormats.Bgr555; break;
case 32: Format = PixelFormats.Bgra32; break;
@ -212,15 +213,38 @@ namespace GameRes
m_stride = m_width * ((meta.BPP+7) / 8);
m_image_offset = meta.ColormapOffset;
if (1 == meta.ColormapType)
{
m_image_offset += colormap_size;
m_input.Position = meta.ColormapOffset;
ReadColormap (meta.ColormapLength, meta.ColormapDepth);
}
m_data = new byte[m_stride*m_height];
}
private void ReadColormap (int length, int depth)
{
if (24 != depth && 32 != depth)
throw new NotImplementedException();
int pixel_size = depth / 8;
var palette_data = new byte[length * pixel_size];
if (palette_data.Length != m_input.Read (palette_data, 0, palette_data.Length))
throw new InvalidFormatException();
var palette = new Color[length];
for (int i = 0; i < palette.Length; ++i)
{
byte b = palette_data[i*pixel_size];
byte g = palette_data[i*pixel_size+1];
byte r = palette_data[i*pixel_size+2];
palette[i] = Color.FromRgb (r, g, b);
}
Palette = new BitmapPalette (palette);
}
public byte[] Unpack ()
{
switch (m_meta.ImageType)
{
case 1: // Uncompressed, color-mapped images.
case 3: // Uncompressed, black and white images.
case 9: // Runlength encoded color-mapped images.
case 11: // Compressed, black and white images.
@ -231,8 +255,9 @@ namespace GameRes
throw new NotImplementedException();
default:
throw new InvalidFormatException();
case 1: // Uncompressed, color-mapped images.
case 2: // Uncompressed, RGB images.
ReadRGB();
ReadRaw();
break;
case 10: // Runlength encoded RGB images.
ReadRLE ((m_meta.BPP+7)/8);
@ -241,7 +266,7 @@ namespace GameRes
return Data;
}
void ReadRGB ()
void ReadRaw ()
{
m_input.Position = m_image_offset;
if (0 != (m_meta.Descriptor & 0x20))