private static VspHeader ExtractHeader(DriObject dri)
{
VspHeader header = new VspHeader();
int offset = dri.realDataPtr;
byte[] data = dri.dataRaw;
header.x0 = LEBitConverter.From2ToInt(data, offset);
header.y0 = LEBitConverter.From2ToInt(data, offset + 2);
header.width = LEBitConverter.From2ToInt(data, offset + 4) - header.x0;
header.height = LEBitConverter.From2ToInt(data, offset + 6) - header.y0;
header.palletBank = (int)data[offset + 9];
header.palletPtr = 0x0a;
header.dataPtr = 0x3a;
return header;
}
public static byte[] ExtractImageData(DriObject dri, VspHeader header)
{
int vspDataOffset = header.dataPtr;
int offset = dri.realDataPtr + vspDataOffset;
// +10 Margin for broken CG
int picSize = (header.width * 8 + 10) * (header.height + 10);
int w = header.width;
int h = header.height;
// raw の +offset から VSP 画像データを展開し data へコピー
byte[] raw = dri.dataRaw;
byte[] data = new byte[picSize];
// extraction buffer (現在のプレーンと前のプレーン)
byte[][] bc = new byte[4][];
byte[][] bp = new byte[4][];
for (int j = 0; j < 4; ++j) bc[j] = new byte[480];
for (int j = 0; j < 4; ++j) bp[j] = new byte[480];
// 圧縮コード, mask, copy length
int c0, l;
byte mask = 0x00;
for (int x = 0; x < w; ++x) {
// バッファに読み込む
for (int pl = 0; pl < 4; ++pl) {
for (int y = 0; y < h;) {
c0 = raw[offset];
offset++;
if (c0 >= 0x08) {
bc[pl][y] = (byte)c0;
++y;
} else if (c0 == 0x00) {
l = (int)raw[offset] + 1;
offset++;
for (int i = 0; i < l; ++i)
bc[pl][y + i] = bp[pl][y + i];
y += l;
} else if (c0 == 0x01) {
l = (int)raw[offset] + 1;
offset++;
byte b0 = raw[offset];
offset++;
for (int i = 0; i < l; ++i)
bc[pl][y + i] = b0;
y += l;
} else if (c0 == 0x02) {
l = (int)raw[offset] + 1;
offset++;
byte b0 = raw[offset];
offset++;
byte b1 = raw[offset];
offset++;
for (int i = 0; i < l; ++i) {
bc[pl][y] = b0; ++y;
bc[pl][y] = b1; ++y;
}
} else if (c0 == 0x03) {
l = (int)raw[offset] + 1;
offset++;
for (int i = 0; i < l; ++i) {
bc[pl][y] = (byte)(bc[0][y] ^ mask);
++y;
}
mask = 0x00;
} else if (c0 == 0x04) {
l = (int)raw[offset] + 1;
offset++;
for (int i = 0; i < l; ++i) {
bc[pl][y] = (byte)(bc[1][y] ^ mask);
++y;
}
mask = 0x00;
} else if (c0 == 0x05) {
l = (int)raw[offset] + 1;
offset++;
for (int i = 0; i < l; ++i) {
bc[pl][y] = (byte)(bc[2][y] ^ mask);
++y;
}
mask = 0x00;
} else if (c0 == 0x06) {
mask = 0xff;
} else if (c0 == 0x07) {
bc[pl][y] = raw[offset];
offset++;
++y;
}
}
}
// place から packed 展開
for (int y = 0; y < h; ++y) {
int loc = (y * w + x) * 8;
byte b0 = bc[0][y];
byte b1 = bc[1][y];
byte b2 = bc[2][y];
byte b3 = bc[3][y];
data[loc + 0] = (byte)(((b0>>7)&0x01) |
((b1>>6)&0x02) |
((b2>>5)&0x04) |
((b3>>4)&0x08));
data[loc + 1] = (byte)(((b0>>6)&0x01) |
((b1>>5)&0x02) |
((b2>>4)&0x04) |
((b3>>3)&0x08));
data[loc + 2] = (byte)(((b0>>5)&0x01) |
((b1>>4)&0x02) |
((b2>>3)&0x04) |
((b3>>2)&0x08));
data[loc + 3] = (byte)(((b0>>4)&0x01) |
((b1>>3)&0x02) |
((b2>>2)&0x04) |
((b3>>1)&0x08));
data[loc + 4] = (byte)(((b0>>3)&0x01) |
((b1>>2)&0x02) |
((b2>>1)&0x04) |
((b3 )&0x08));
data[loc + 5] = (byte)(((b0>>2)&0x01) |
((b1>>1)&0x02) |
((b2 )&0x04) |
((b3<<1)&0x08));
data[loc + 6] = (byte)(((b0>>1)&0x01) |
((b1 )&0x02) |
((b2<<1)&0x04) |
((b3<<2)&0x08));
data[loc + 7] = (byte)(((b0 )&0x01) |
((b1<<1)&0x02) |
((b2<<2)&0x04) |
((b3<<3)&0x08));
}
// buffer の入れ替え用
byte[] bt;
bt = bp[0]; bp[0] = bc[0]; bc[0] = bt;
bt = bp[1]; bp[1] = bc[1]; bc[1] = bt;
bt = bp[2]; bp[2] = bc[2]; bc[2] = bt;
bt = bp[3]; bp[3] = bc[3]; bc[3] = bt;
}
return data;
}
public static Pallet256 GetPallet(DriObject dri, VspHeader header)
{
Pallet256 pallet = new Pallet256();
int vspPalletOffset = header.palletPtr;
int offset = dri.realDataPtr + vspPalletOffset;
byte[] data = dri.dataRaw;
int red, green, blue;
for (int i = 0; i < 16; ++i) {
blue = (int)data[offset + i * 3 + 0];
red = (int)data[offset + i * 3 + 1];
green = (int)data[offset + i * 3 + 2];
pallet.blue[i] = (byte)(blue << 4);
pallet.red[i] = (byte)(red << 4);
pallet.green[i] = (byte)(green << 4);
}
return pallet;
}
