diff options
Diffstat (limited to 'libgui')
| -rw-r--r-- | libgui/Makefile | 21 | ||||
| -rw-r--r-- | libgui/inc/vesa.h | 57 | ||||
| -rw-r--r-- | libgui/vesa.c | 42 |
3 files changed, 120 insertions, 0 deletions
diff --git a/libgui/Makefile b/libgui/Makefile new file mode 100644 index 0000000..89bbb35 --- /dev/null +++ b/libgui/Makefile @@ -0,0 +1,21 @@ +# MIT License, Copyright (c) 2020 Marvin Borner + +COBJS = vesa.o +CC = ../cross/opt/bin/i686-elf-gcc +LD = ../cross/opt/bin/i686-elf-ld +OC = ../cross/opt/bin/i686-elf-ar + +# Flags to make the binary smaller TODO: Remove after indirect pointer support! +CSFLAGS = -mpreferred-stack-boundary=2 -fno-asynchronous-unwind-tables -Os + +CFLAGS = $(CSFLAGS) -Wall -Wextra -nostdlib -nostdinc -ffreestanding -fno-builtin -mgeneral-regs-only -std=c99 -m32 -pedantic-errors -Iinc/ -I../libc/inc/ -Duserspace -fPIE + +%.o: %.c + @$(CC) -c $(CFLAGS) $< -o $@ + +libgui: $(COBJS) + @mkdir -p ../build/ + @$(AR) qc ../build/libgui.a $+ + +clean: + @find . -name "*.o" -type f -delete diff --git a/libgui/inc/vesa.h b/libgui/inc/vesa.h new file mode 100644 index 0000000..e34cdc0 --- /dev/null +++ b/libgui/inc/vesa.h @@ -0,0 +1,57 @@ +// MIT License, Copyright (c) 2020 Marvin Borner + +#ifndef VBE_H +#define VBE_H + +#include <def.h> + +struct vbe { + u16 attributes; + u8 window_a; + u8 window_b; + u16 granularity; + u16 window_size; + u16 segment_a; + u16 segment_b; + u32 win_func_ptr; + u16 pitch; + u16 width; + u16 height; + u8 w_char; + u8 y_char; + u8 planes; + u8 bpp; + u8 banks; + u8 memory_model; + u8 bank_size; + u8 image_pages; + u8 reserved0; + + u8 red_mask; + u8 red_position; + u8 green_mask; + u8 green_position; + u8 blue_mask; + u8 blue_position; + u8 reserved_mask; + u8 reserved_position; + u8 direct_color_attributes; + + u32 framebuffer; + u32 off_screen_mem_off; + u16 off_screen_mem_size; + u8 reserved1[206]; +}; + +struct vbe *vbe; +int vbe_width; +int vbe_height; +int vbe_bpl; +int vbe_pitch; +u8 *fb; + +void vesa_fill(const u32 color[3]); +void vesa_set_pixel(u16 x, u16 y, const u32 color[3]); +void vesa_init(struct vbe *info); + +#endif diff --git a/libgui/vesa.c b/libgui/vesa.c new file mode 100644 index 0000000..2d3e107 --- /dev/null +++ b/libgui/vesa.c @@ -0,0 +1,42 @@ +// MIT License, Copyright (c) 2020 Marvin Borner + +#include <def.h> +#include <vesa.h> + +void vesa_draw_rectangle(int x1, int y1, int x2, int y2, const u32 color[3]) +{ + int pos1 = x1 * vbe_bpl + y1 * vbe_pitch; + u8 *draw = &fb[pos1]; + for (int i = 0; i <= y2 - y1; i++) { + for (int j = 0; j <= x2 - x1; j++) { + draw[vbe_bpl * j] = color[2]; + draw[vbe_bpl * j + 1] = color[1]; + draw[vbe_bpl * j + 2] = color[0]; + } + draw += vbe_pitch; + } +} + +void vesa_set_pixel(u16 x, u16 y, const u32 color[3]) +{ + u8 pos = x * vbe_bpl + y * vbe_pitch; + u8 *draw = &fb[pos]; + draw[pos] = (char)color[2]; + draw[pos + 1] = (char)color[1]; + draw[pos + 2] = (char)color[0]; +} + +void vesa_fill(const u32 color[3]) +{ + vesa_draw_rectangle(0, 0, vbe->width - 1, vbe->height - 1, color); +} + +void vesa_init(struct vbe *info) +{ + vbe = info; + vbe_height = vbe->height; + vbe_width = vbe->width; + vbe_bpl = vbe->bpp >> 3; + vbe_pitch = vbe->pitch; + fb = (u8 *)vbe->framebuffer; +} |