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Allow looped animation to be used safely with old clients

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fixes #12657
This commit is contained in:
sfan5 2022-09-04 16:22:12 +02:00
parent adb03ccc6d
commit c607bee19e
4 changed files with 15 additions and 8 deletions
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14
src/tileanimation.cpp
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@ -19,21 +19,27 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "tileanimation.h"
#include "util/serialize.h"
void TileAnimationParams::serialize(std::ostream &os, u16 protocol_version) const
void TileAnimationParams::serialize(std::ostream &os, u16 protocol_ver) const
{
// The particle code overloads the length parameter so that negative numbers
// indicate an extra feature which old clients don't understand (crash).
// In hindsight it would have been better to use an extra parameter for this
// but we're stuck with this now.
const bool need_abs = protocol_ver < 40;
writeU8(os, type);
if (type == TAT_VERTICAL_FRAMES) {
writeU16(os, vertical_frames.aspect_w);
writeU16(os, vertical_frames.aspect_h);
writeF32(os, vertical_frames.length);
writeF32(os, need_abs ? fabs(vertical_frames.length) : vertical_frames.length);
} else if (type == TAT_SHEET_2D) {
writeU8(os, sheet_2d.frames_w);
writeU8(os, sheet_2d.frames_h);
writeF32(os, sheet_2d.frame_length);
writeF32(os, need_abs ? fabs(sheet_2d.frame_length) : sheet_2d.frame_length);
}
}
void TileAnimationParams::deSerialize(std::istream &is, u16 protocol_version)
void TileAnimationParams::deSerialize(std::istream &is, u16 protocol_ver)
{
type = (TileAnimationType) readU8(is);