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GUI: Add a function to draw vertical/horizontal bars 

Add a function to draw solid vertical or horizontal bars.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Andrey Smirnov 2016-06-27 21:27:56 -07:00 committed by Sascha Hauer
parent d7fc1c18e7
commit 0cd1a51924
2 changed files with 32 additions and 0 deletions
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3
include/gui/graphic_utils.h
View File

@ -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__ */

29
lib/gui/graphic_utils.c
View File

@ -336,3 +336,32 @@ 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);
x1 = max(0, x1);
y1 = max(0, y1);
x2 = (x2 < 0) ? sc->info->xres - 1 : x2;
y2 = (y2 < 0) ? sc->info->yres - 1 : y2;
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;
}
}
}