diff options
Diffstat (limited to 'src/draw/ao_rect.c')
| -rw-r--r-- | src/draw/ao_rect.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/draw/ao_rect.c b/src/draw/ao_rect.c new file mode 100644 index 00000000..fee7bbd5 --- /dev/null +++ b/src/draw/ao_rect.c @@ -0,0 +1,55 @@ +/* + * Copyright © 2016 Keith Packard <keithp@keithp.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include "ao.h" +#include "ao_draw.h" +#include "ao_draw_int.h" + +#define bound(val,max) do { \ + if (val < 0) { \ + val = 0; \ + } \ + if (val > max) { \ + val = max; \ + } \ + } while (0) + +void +ao_rect(const struct ao_bitmap *dst, + int16_t x, + int16_t y, + int16_t width, + int16_t height, + uint32_t fill, + uint8_t rop) +{ + int16_t x2 = x + width; + int16_t y2 = y + height; + + bound(x, dst->width); + bound(x2, dst->width); + bound(y, dst->height); + bound(y2, dst->height); + + if (x < x2 && y < y2) { + ao_solid(ao_and(rop, fill), + ao_xor(rop, fill), + dst->base + y * dst->stride, + dst->stride, + x, + x2 - x, + y2 - y); + } +} + |