shithub: puzzles

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Fix a display glitch in Keen's pencil-mode cursor.

Draw pencil-mode cursor before corners of thick lines in order to make
the thick lines appear on top of the north-west corner of the pencil
cursor, just like they do with the non-pencil cursor.

--- a/keen.c

+++ b/keen.c

@@ -1790,6 +1790,18 @@

     draw_rect(dr, cx, cy, cw, ch,

 	      (tile & DF_HIGHLIGHT) ? COL_HIGHLIGHT : COL_BACKGROUND);

+    /* pencil-mode highlight */

+    if (tile & DF_HIGHLIGHT_PENCIL) {

+        int coords[6];

+        coords[0] = cx;

+        coords[1] = cy;

+        coords[2] = cx+cw/2;

+        coords[3] = cy;

+        coords[4] = cx;

+        coords[5] = cy+ch/2;

+        draw_polygon(dr, coords, 3, COL_HIGHLIGHT, COL_HIGHLIGHT);

+    }

+

     /*

      * Draw the corners of thick lines in corner-adjacent squares,

      * which jut into this square by one pixel.

@@ -1802,18 +1814,6 @@

 	draw_rect(dr, tx-GRIDEXTRA, ty+TILESIZE-1-2*GRIDEXTRA, GRIDEXTRA, GRIDEXTRA, COL_GRID);

     if (x+1 < w && y+1 < w && dsf_canonify(clues->dsf, y*w+x) != dsf_canonify(clues->dsf, (y+1)*w+x+1))

 	draw_rect(dr, tx+TILESIZE-1-2*GRIDEXTRA, ty+TILESIZE-1-2*GRIDEXTRA, GRIDEXTRA, GRIDEXTRA, COL_GRID);

-

-    /* pencil-mode highlight */

-    if (tile & DF_HIGHLIGHT_PENCIL) {

-        int coords[6];

-        coords[0] = cx;

-        coords[1] = cy;

-        coords[2] = cx+cw/2;

-        coords[3] = cy;

-        coords[4] = cx;

-        coords[5] = cy+ch/2;

-        draw_polygon(dr, coords, 3, COL_HIGHLIGHT, COL_HIGHLIGHT);

-    }

     /* Draw the box clue. */

     if (dsf_canonify(clues->dsf, y*w+x) == y*w+x) {