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(AGF): implemented 4bpp images.

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This commit is contained in:
morkt 2018-01-02 06:40:07 +04:00
parent e998491cda
commit 92a133fd52
1 changed files with 31 additions and 8 deletions
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39
ArcFormats/Eushully/ImageAGF.cs
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@ -53,16 +53,16 @@ namespace GameRes.Formats.Eushully
public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
uint id = stream.Signature;
if (Signature != id && 0 != id)
return null;
var header = new byte[0x20];
if (0x18 != stream.Read (header, 0, 0x18))
return null;
uint id = LittleEndian.ToUInt32 (header, 0);
if (Signature != id && 0 != id)
return null;
int type = LittleEndian.ToInt32 (header, 4);
if (type != 1 && type != 2)
return null;
int unpacked_size = LittleEndian.ToInt32 (header, 0x10);
int unpacked_size = LittleEndian.ToInt32 (header, 0xC);
int packed_size = LittleEndian.ToInt32 (header, 0x14);
using (var unpacked = AgfReader.OpenSection (stream.AsStream, unpacked_size, packed_size))
using (var reader = new BinaryReader (unpacked))
@ -79,7 +79,7 @@ namespace GameRes.Formats.Eushully
};
if (0 == info.SourceBPP)
return null;
if (8 == info.SourceBPP)
if (info.SourceBPP <= 8)
{
reader.Read (header, 0, 0x18); // skip rest of the header
info.Palette = ReadColorMap (reader.BaseStream);
@ -156,17 +156,19 @@ namespace GameRes.Formats.Eushully
m_bpp = 24;
}
Format = 32 == m_bpp ? PixelFormats.Bgra32 : PixelFormats.Bgr24;
int src_pixel_size = m_source_bpp / 8;
int src_pixel_size = m_source_bpp / 8; // not used for 4bpp bitmaps
int dst_pixel_size = m_bpp / 8;
int src_stride = (m_width * src_pixel_size + 3) & ~3;
int src_stride = (m_width * m_source_bpp / 8 + 3) & ~3;
int dst_stride = m_width * dst_pixel_size;
int src_row = (m_height - 1) * src_stride;
int dst_row = 0;
int src_alpha = 0;
RowUnpacker repack_row = RepackRowTrue;
if (1 == src_pixel_size)
if (8 == m_source_bpp)
repack_row = RepackRow8;
else if (4 == m_source_bpp)
repack_row = RepackRow4;
while (src_row >= 0)
{
repack_row (bmp_data, src_row, src_pixel_size, dst_row, dst_pixel_size, alpha, src_alpha);
@ -178,6 +180,27 @@ namespace GameRes.Formats.Eushully
delegate void RowUnpacker (byte[] bmp, int src, int src_pixel_size, int dst, int dst_pixel_size, byte[] alpha, int src_alpha);
void RepackRow4 (byte[] bmp, int src, int src_pixel_size, int dst, int dst_pixel_size, byte[] alpha, int src_alpha)
{
for (int x = 0; x < m_width; )
{
byte px = bmp[src++];
for (int j = 0; j < 2; ++j)
{
var color = m_palette[(px >> 4) & 0xF];
m_output[dst] = color.B;
m_output[dst+1] = color.G;
m_output[dst+2] = color.R;
if (null != alpha)
m_output[dst+3] = alpha[src_alpha++];
dst += dst_pixel_size;
if (++x >= m_width)
break;
px <<= 4;
}
}
}
void RepackRow8 (byte[] bmp, int src, int src_pixel_size, int dst, int dst_pixel_size, byte[] alpha, int src_alpha)
{
for (int i = 0; i < m_width; ++i)