Add a routine implementing midpoint circle algorithm
Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
---
include/gui/graphic_utils.h | 3 +++
lib/gui/graphic_utils.c | 26 ++++++++++++++++++++++++++
2 files changed, 29 insertions(+)
diff --git a/include/gui/graphic_utils.h b/include/gui/graphic_utils.h
index 231b3a9..279fdf9 100644
--- a/include/gui/graphic_utils.h
+++ b/include/gui/graphic_utils.h
@@ -28,4 +28,7 @@ void gu_invert_area(struct fb_info *info, void *buf, int
startx, int starty, int
void gu_screen_blit_area(struct screen *sc, int startx, int starty, int width,
int height);
+void gu_fill_rectangle(struct screen *sc,
+ int x1, int y1, int x2, int y2,
+ u8 r, u8 g, u8 b, u8 a);
#endif /* __GRAPHIC_UTILS_H__ */
diff --git a/lib/gui/graphic_utils.c b/lib/gui/graphic_utils.c
index 2fe9fa3..c6c4373 100644
--- a/lib/gui/graphic_utils.c
+++ b/lib/gui/graphic_utils.c
@@ -336,3 +336,29 @@ void gu_screen_blit(struct screen *sc)
if (info->screen_base_shadow)
memcpy(info->screen_base, info->screen_base_shadow, sc->fbsize);
}
+
+void gu_fill_rectangle(struct screen *sc,
+ int x1, int y1, int x2, int y2,
+ u8 r, u8 g, u8 b, u8 a)
+{
+ int y;
+ void *buf = gui_screen_render_buffer(sc);
+
+ BUG_ON(x1 < 0 || y1 < 0 ||
+ x2 < 0 || y2 < 0);
+
+ if (x2 < x1)
+ swap(x1, x2);
+ if (y2 < y1)
+ swap(y1, y2);
+
+ for(y = y1; y <= y2; y++) {
+ int x;
+ unsigned char *pixel = buf + y * sc->info->line_length +
+ x1 * (sc->info->bits_per_pixel / 8);
+ for(x = x1; x <= x2; x++) {
+ gu_set_rgba_pixel(sc->info, pixel, r, g, b, a);
+ pixel += sc->info->bits_per_pixel / 8;
+ }
+ }
+}
--
2.5.5
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