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Match DecodeSS2 (#1476)

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Co-authored-by: jonschz <jonschz@users.noreply.github.com>
This commit is contained in:
jonschz
2025-05-25 07:59:58 +02:00
committed by GitHub
parent a860e76dba
commit 8e54a20d7d
1 changed files with 84 additions and 49 deletions
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117
LEGO1/omni/src/video/flic.cpp
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@@ -355,64 +355,99 @@ void DecodeLC(LPBITMAPINFOHEADER p_bitmapHeader, BYTE* p_pixelData, BYTE* p_data
// FUNCTION: BETA10 0x1013e61d
void DecodeSS2(LPBITMAPINFOHEADER p_bitmapHeader, BYTE* p_pixelData, BYTE* p_data, FLIC_HEADER* p_flcHeader)
{
short width = (short) p_flcHeader->width - 1;
short row = (short) p_flcHeader->height - 1;
short lines = *((short*) p_data);
BYTE* data = p_data + 2;
short xofs = 0;
short yofs = 0;
while (--lines > 0) {
short token;
short width = p_flcHeader->width;
short token = 0;
while (TRUE) {
token = *((short*) data);
data += 2;
// LINE: BETA10 0x1013e643
short xmax = xofs + width - 1;
if (token < 0) {
if (token & 0x4000) {
// LINE: BETA10 0x1013e652
union {
BYTE* byte;
WORD* word;
} data = {p_data};
// The first word in the data following the chunk header contains the number of lines in the chunk.
// The line count does not include skipped lines.
short lines = *(short*) data.word++;
// LINE: BETA10 0x1013e666
short row = p_flcHeader->height - yofs - 1;
goto start_packet;
skip_lines:
// The layout in BETA10 strongly suggests that lots of `goto`s are used.
// LINE: BETA10 0x1013e684
row += token;
}
else {
WritePixel(p_bitmapHeader, p_pixelData, width, row, token);
token = *((WORD*) data);
data += 2;
start_packet:
// LINE: BETA10 0x1013e692
token = *(short*) data.word++;
if (token >= 0) {
goto column_loop;
}
if ((unsigned short) token & 0x4000) {
goto skip_lines;
}
WritePixel(p_bitmapHeader, p_pixelData, xmax, row, token);
token = *(short*) data.word++;
// LINE: BETA10 0x1013e6ef
if (!token) {
row--;
if (--lines <= 0) {
if (--lines > 0) {
goto start_packet;
}
return;
}
}
else {
break;
}
}
}
else {
break;
}
}
short column = 0;
do {
column += *(data++);
short type = *((char*) data++);
column_loop:
// LINE: BETA10 0x1013e71e
short column = xofs;
column_loop_inner:
// LINE: BETA10 0x1013e726
column += *data.byte++;
// LINE: BETA10 0x1013e73a
short type = *(char*) data.byte++;
type += type;
if (type >= 0) {
WritePixels(p_bitmapHeader, p_pixelData, column, row, data, type);
WritePixels(p_bitmapHeader, p_pixelData, column, row, data.byte, type);
column += type;
data += type;
data.byte += type;
// LINE: BETA10 0x1013e797
if (--token != 0) {
goto column_loop_inner;
}
else {
type = -type;
short p_pixel = *((WORD*) data);
data += 2;
WritePixelPairs(p_bitmapHeader, p_pixelData, column, row, p_pixel, type >> 1);
column += type;
}
} while (--token);
row--;
if (--lines > 0) {
goto start_packet;
}
return;
}
type = -type;
WORD* p_pixel = data.word++;
WritePixelPairs(p_bitmapHeader, p_pixelData, column, row, *p_pixel, type >> 1);
column += type;
// LINE: BETA10 0x1013e813
if (--token != 0) {
goto column_loop_inner;
}
row--;
if (--lines > 0) {
goto start_packet;
}
return;
}
}