void ImageFile::loadPalette(Common::SeekableReadStream &stream) {
// Check for palette
uint16 width = stream.readUint16LE() + 1;
uint16 height = stream.readUint16LE() + 1;
byte paletteBase = stream.readByte();
byte rleEncoded = stream.readByte();
byte offsetX = stream.readByte();
byte offsetY = stream.readByte();
uint32 palSignature = 0;
if ((width == 390) && (height == 2) && (!paletteBase) && (!rleEncoded) && (!offsetX) && (!offsetY)) {
// We check for these specific values
// We can't do "width * height", because at least the first German+Spanish menu bar is 60 x 13
// which is 780, which is the size of the palette. We obviously don't want to detect it as palette.
// As another security measure, we also check for the signature text
palSignature = stream.readUint32BE();
if (palSignature != MKTAG('V', 'G', 'A', ' ')) {
// signature mismatch, rewind
stream.seek(-12, SEEK_CUR);
return;
}
// Found palette, so read it in
stream.seek(8, SEEK_CUR); // Skip over the rest of the signature text "VGA palette"
for (int idx = 0; idx < PALETTE_SIZE; ++idx)
_palette[idx] = VGA_COLOR_TRANS(stream.readByte());
} else {
// Not a palette, so rewind to start of frame data for normal frame processing
stream.seek(-8, SEEK_CUR);
}
}
void Screen::setIconPalette() {
if (_vm->getGameID() == GType_MartianMemorandum) {
for (int i = 0; i < 0x1B; i++) {
_rawPalette[741 + i] = VGA_COLOR_TRANS(Martian::ICON_PALETTE[i]);
}
}
}
void ImageFile::loadPalette(Common::SeekableReadStream &stream) {
// Check for palette
int v1 = stream.readUint16LE() + 1;
int v2 = stream.readUint16LE() + 1;
stream.skip(1); // Skip paletteBase byte
bool rleEncoded = stream.readByte() == 1;
int palSize = v1 * v2;
if ((palSize - 12) == PALETTE_SIZE && !rleEncoded) {
// Found palette, so read it in
stream.seek(2 + 12, SEEK_CUR);
for (int idx = 0; idx < PALETTE_SIZE; ++idx)
_palette[idx] = VGA_COLOR_TRANS(stream.readByte());
} else {
// Not a palette, so rewind to start of frame data for normal frame processing
stream.seek(-6, SEEK_CUR);
}
}
void Screen::translatePalette(byte palette[PALETTE_SIZE]) {
for (int idx = 0; idx < PALETTE_SIZE; ++idx)
palette[idx] = VGA_COLOR_TRANS(palette[idx]);
}
void Screen::loadRawPalette(Common::SeekableReadStream *stream) {
stream->read(&_rawPalette[0], PALETTE_SIZE);
for (byte *p = &_rawPalette[0]; p < &_rawPalette[PALETTE_SIZE]; ++p)
*p = VGA_COLOR_TRANS(*p);
}
void Screen::setManPalette() {
for (int i = 0; i < 0x42; i++) {
_rawPalette[672 + i] = VGA_COLOR_TRANS(_manPal[i]);
}
}
