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Use union, unexpected 93 % on LEGO1

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This commit is contained in:
jonschz 2025-05-25 07:45:15 +02:00
parent 38e5b06808
commit abf8fc5ef0
1 changed files with 16 additions and 13 deletions
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29
LEGO1/omni/src/video/flic.cpp
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@ -365,12 +365,15 @@ void DecodeSS2(LPBITMAPINFOHEADER p_bitmapHeader, BYTE* p_pixelData, BYTE* p_dat
short xmax = xofs + width - 1;
// LINE: BETA10 0x1013e652
BYTE* data = p_data;
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;
data += 2;
short lines = *(short*) data.word++;
// data += 2;
// LINE: BETA10 0x1013e666
short row = p_flcHeader->height - yofs - 1;
@ -386,8 +389,8 @@ void DecodeSS2(LPBITMAPINFOHEADER p_bitmapHeader, BYTE* p_pixelData, BYTE* p_dat
start_packet:
// LINE: LEGO1 0x100bdaef
// LINE: BETA10 0x1013e692
token = *(short*) data;
data += 2;
token = *(short*) data.word;
data.byte += 2;
// LINE: LEGO1 0x100bdafb
if (token >= 0) {
goto column_loop;
@ -399,8 +402,8 @@ void DecodeSS2(LPBITMAPINFOHEADER p_bitmapHeader, BYTE* p_pixelData, BYTE* p_dat
// LINE: LEGO1 0x100bdb0a
WritePixel(p_bitmapHeader, p_pixelData, xmax, row, token);
token = *(short*) data;
data += 2;
token = *(short*) data.word;
data.byte += 2;
// LINE: LEGO1 0x100bdb2f
// LINE: BETA10 0x1013e6ef
@ -421,15 +424,15 @@ void DecodeSS2(LPBITMAPINFOHEADER p_bitmapHeader, BYTE* p_pixelData, BYTE* p_dat
column_loop_inner:
// LINE: LEGO1 0x100bdb50
// LINE: BETA10 0x1013e726
column += *data++;
column += *data.byte++;
// LINE: BETA10 0x1013e73a
short type = *(char*) data++;
short type = *(char*) data.byte++;
type += type;
if (type >= 0) {
WritePixels(p_bitmapHeader, p_pixelData, column, row, (BYTE*) data, type);
WritePixels(p_bitmapHeader, p_pixelData, column, row, (BYTE*) data.byte, type);
column += type;
data += type;
data.byte += type;
// LINE: BETA10 0x1013e797
if (--token != 0) {
goto column_loop_inner;
@ -442,8 +445,8 @@ void DecodeSS2(LPBITMAPINFOHEADER p_bitmapHeader, BYTE* p_pixelData, BYTE* p_dat
}
type = -type;
WORD* p_pixel = (WORD*) data;
data += 2;
WORD* p_pixel = (WORD*) data.byte;
data.byte += 2;
WritePixelPairs(p_bitmapHeader, p_pixelData, column, row, *p_pixel, type >> 1);
column += type;
// LINE: BETA10 0x1013e813