From 5121d4bc820b39901461c759a8fbd57d3a8462e3 Mon Sep 17 00:00:00 2001 From: Marvin Borner Date: Wed, 22 Jul 2020 16:32:32 +0200 Subject: Switched to Makefile. Kinda for the sake of minimalism --- src/drivers/vesa.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 src/drivers/vesa.c (limited to 'src/drivers') diff --git a/src/drivers/vesa.c b/src/drivers/vesa.c new file mode 100644 index 0000000..ca130db --- /dev/null +++ b/src/drivers/vesa.c @@ -0,0 +1,25 @@ +#include +#include + +void vesa_draw_rectangle(int x1, int y1, int x2, int y2, const u32 color[3]) +{ + int vbe_bpl = vbe->bpp >> 3; + int vbe_pitch = vbe->pitch; + u8 *fb = (u8 *)vbe->framebuffer; + + int pos1 = x1 * vbe_bpl + y1 * vbe_pitch; + char *draw = (char *)&fb[pos1]; + for (int i = 0; i <= y2 - y1; i++) { + for (int j = 0; j <= x2 - x1; j++) { + draw[vbe_bpl * j] = (char)color[2]; + draw[vbe_bpl * j + 1] = (char)color[1]; + draw[vbe_bpl * j + 2] = (char)color[0]; + } + draw += vbe_pitch; + } +} + +void vesa_clear(const u32 color[3]) +{ + vesa_draw_rectangle(0, 0, vbe->width - 1, vbe->height - 1, color); +} -- cgit v1.2.3