diff options
| -rw-r--r-- | payloads/libpayload/drivers/video/graphics.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/payloads/libpayload/drivers/video/graphics.c b/payloads/libpayload/drivers/video/graphics.c index 01e3565996..943f8edcae 100644 --- a/payloads/libpayload/drivers/video/graphics.c +++ b/payloads/libpayload/drivers/video/graphics.c @@ -223,16 +223,24 @@ int clear_canvas(const struct rgb_color *rgb) int clear_screen(const struct rgb_color *rgb) { - uint32_t color; - struct vector p; - if (cbgfx_init()) return CBGFX_ERROR_INIT; - color = calculate_color(rgb); - for (p.y = 0; p.y < screen.size.height; p.y++) - for (p.x = 0; p.x < screen.size.width; p.x++) - set_pixel(&p, color); + struct vector p; + uint32_t color = calculate_color(rgb); + const int bpp = fbinfo->bits_per_pixel; + const int bpl = fbinfo->bytes_per_line; + + /* If all significant bytes in color are equal, fastpath through memset. + * We assume that for 32bpp the high byte gets ignored anyway. */ + if ((((color >> 8) & 0xff) == (color & 0xff)) && (bpp == 16 || + (((color >> 16) & 0xff) == (color & 0xff)))) { + memset(fbaddr, color & 0xff, screen.size.height * bpl); + } else { + for (p.y = 0; p.y < screen.size.height; p.y++) + for (p.x = 0; p.x < screen.size.width; p.x++) + set_pixel(&p, color); + } return CBGFX_SUCCESS; } |