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M4: Further endian fixes

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This commit is contained in:
Paul Gilbert 2024-05-24 20:31:39 -07:00
parent 4b3780b4c1
commit 2a5ffabb74
1 changed files with 11 additions and 6 deletions
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17
engines/m4/wscript/ws_load.cpp
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@ -1721,7 +1721,7 @@ bool ws_OpenSSstream(SysFile *sysFile, Anim8 *anim8) {
numSprites = FROM_LE_32(celsPtr[CELS_COUNT]);
myRegs[IDX_CELS_INDEX] = -(1 << 16); // First frame inc will make it 0
myRegs[IDX_CELS_COUNT] = numSprites << 16;
myRegs[IDX_CELS_FRAME_RATE] = celsPtr[CELS_FRAME_RATE] << 16;
myRegs[IDX_CELS_FRAME_RATE] = FROM_LE_32(celsPtr[CELS_FRAME_RATE]) << 16;
// Here we convert the offset table to become the actual size of the data for each sprite
// This is so the stream can be optimized to always read in on sprite boundaries
@ -1731,17 +1731,22 @@ bool ws_OpenSSstream(SysFile *sysFile, Anim8 *anim8) {
maxFrameSize = 0;
// For all but the last frame, the frame size is the difference in offset values
for (i = 0; i < numSprites - 1; i++) {
offsets[i] = offsets[i + 1] - offsets[i];
if (offsets[i] > maxFrameSize) {
uint32 diff = FROM_LE_32(offsets[i + 1]) - FROM_LE_32(offsets[i]);
WRITE_LE_UINT32(&offsets[i], diff);
if (FROM_LE_32(offsets[i]) > maxFrameSize) {
maxFrameSize = offsets[i];
obesest_frame = i;
}
}
// For the last sprite we take the entire chunk size - the chunk header - the offset for that sprite
offsets[numSprites - 1] = celsPtr[CELS_SRC_SIZE] - ((SS_HEAD_SIZE + celsPtr[CELS_COUNT]) << 2) - offsets[numSprites - 1];
if (offsets[numSprites - 1] > maxFrameSize) {
maxFrameSize = offsets[numSprites - 1];
WRITE_LE_UINT32(&offsets[numSprites - 1], FROM_LE_32(celsPtr[CELS_SRC_SIZE]) -
((SS_HEAD_SIZE + FROM_LE_32(celsPtr[CELS_COUNT])) << 2) -
FROM_LE_32(offsets[numSprites - 1]));
if (FROM_LE_32(offsets[numSprites - 1]) > maxFrameSize) {
maxFrameSize = FROM_LE_32(offsets[numSprites - 1]);
obesest_frame = numSprites - 1;
}