Adjusted logic in Term_pict_cocoa() to handle big tile mode.

diff --git a/src/main-cocoa.m b/src/main-cocoa.m
index d47ddf8..e4b4834 100644 (file)
--- a/src/main-cocoa.m
+++ b/src/main-cocoa.m
@@ -3016,12 +3016,18 @@ static errr Term_pict_cocoa(int x, int y, int n, TERM_COLOR *ap,
     
     AngbandContext* angbandContext = Term->data;
     int any_change = 0;
+    int step = (use_bigtile) ? 2 : 1;
     struct PendingCellChange *pc;
 
     if (angbandContext->changes == 0) {
        /* Bail out; there was an earlier memory allocation failure. */
        return 1;
     }
+    /*
+     * In bigtile mode, it is sufficient that the bounds for the modified
+     * region only encompass the left cell for the region affected by the
+     * tile and that only that cell has to have the details of the changes.
+     */
     if (angbandContext->changes->rows[y] == 0) {
        angbandContext->changes->rows[y] =
            create_row_change(angbandContext->cols);
@@ -3040,12 +3046,12 @@ static errr Term_pict_cocoa(int x, int y, int n, TERM_COLOR *ap,
     if (angbandContext->changes->rows[y]->xmin > x) {
        angbandContext->changes->rows[y]->xmin = x;
     }
-    if (angbandContext->changes->rows[y]->xmax < x + n - 1) {
-       angbandContext->changes->rows[y]->xmax = x + n - 1;
+    if (angbandContext->changes->rows[y]->xmax < x + step * (n - 1)) {
+       angbandContext->changes->rows[y]->xmax = x + step * (n - 1);
     }
     for (pc = angbandContext->changes->rows[y]->cell_changes + x;
-        pc != angbandContext->changes->rows[y]->cell_changes + x + n;
-        ++pc) {
+        pc != angbandContext->changes->rows[y]->cell_changes + x + step * n;
+        pc += step) {
        TERM_COLOR a = *ap++;
        char c = *cp++;
        TERM_COLOR ta = *tap++;