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Fix crashes using flood fill algorithm in a large canvas (fix #4481)

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This commit is contained in:
David Capello 2024-05-23 10:45:43 -03:00
parent 8fce589069
commit 577f50b713
1 changed files with 6 additions and 8 deletions
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14
src/doc/algorithm/floodfill.cpp
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@ -24,21 +24,19 @@
#include <climits>
#include <cmath>
#include <limits>
#include <vector>
namespace doc {
namespace algorithm {
struct FLOODED_LINE { // store segments which have been flooded
short flags; // status of the segment
short lpos, rpos; // left and right ends of segment
short y; // y coordinate of the segment
char flags; // status of the segment
int lpos, rpos; // left and right ends of segment
int y; // y coordinate of the segment
int next; // linked list if several per line
};
/* Note: a 'short' is not sufficient for 'next' above in some corner cases. */
static std::vector<FLOODED_LINE> flood_buf;
static int flood_count; /* number of flooded segments */
@ -415,8 +413,8 @@ void floodfill(const Image* image,
FLOODED_LINE* p = (FLOODED_LINE*)&flood_buf[0];
for (int c=0; c<flood_count; c++) {
p[c].flags = 0;
p[c].lpos = SHRT_MAX;
p[c].rpos = SHRT_MIN;
p[c].lpos = std::numeric_limits<int>::max();
p[c].rpos = std::numeric_limits<int>::min();
p[c].y = y;
p[c].next = 0;
}