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ensure command alignment is correct #292

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ensure command alignment is correct #292

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3 changes: 3 additions & 0 deletions src/rencache.c
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
#include <stdio.h>
#include <stdalign.h>
#include "rencache.h"

/* a cache over the software renderer -- all drawing operations are stored as
Expand Down Expand Up @@ -78,6 +79,8 @@ static RenRect merge_rects(RenRect a, RenRect b) {


static Command* push_command(int type, int size) {
size_t alignment = alignof(max_align_t) - 1;
size = (size + alignment) & ~alignment;
Command *cmd = (Command*) (command_buf + command_buf_idx);
int n = command_buf_idx + size;
if (n > COMMAND_BUF_SIZE) {
Expand Down