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Patch from Mark Wooding to introduce a draw_thick_line() function in

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the drawing API, for use by Loopy. It's optional: drawing.c will
construct an acceptable alternative using a filled polygon if the
front end doesn't provide it.

Net and Netslide previously had static functions called
draw_thick_line(), whose claim to the name is less justified and so
they've been renamed.

[originally from svn r8962]
This commit is contained in:
Simon Tatham
2010-05-29 15:43:46 +00:00
parent ef6e78c6ac
commit 9cd182ffa9
7 changed files with 95 additions and 25 deletions
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19
loopy.c
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@ -3543,21 +3543,10 @@ static void game_redraw(drawing *dr, game_drawstate *ds, game_state *oldstate,
if (draw_faint_lines)
draw_line(dr, x1, y1, x2, y2, line_colour);
} else {
/* (dx, dy) points roughly from (x1, y1) to (x2, y2).
* The line is then "fattened" in a (roughly) perpendicular
* direction to create a thin rectangle. */
int dx = (x1 > x2) ? -1 : ((x1 < x2) ? 1 : 0);
int dy = (y1 > y2) ? -1 : ((y1 < y2) ? 1 : 0);
int points[8];
points[0] = x1 + dy;
points[1] = y1 - dx;
points[2] = x1 - dy;
points[3] = y1 + dx;
points[4] = x2 - dy;
points[5] = y2 + dx;
points[6] = x2 + dy;
points[7] = y2 - dx;
draw_polygon(dr, points, 4, line_colour, line_colour);
draw_thick_line(dr, 3.0,
x1 + 0.5, y1 + 0.5,
x2 + 0.5, y2 + 0.5,
line_colour);
}
if (ds->started) {
/* Draw dots at ends of the line */