video-vga: add routines for vga

1 files changed, 36 insertions, 0 deletions

diff --git a/kernel/video-vga.h b/kernel/video-vga.h
new file mode 100644
index 0000000..ddcfc31
--- /dev/null
+++ b/kernel/video-vga.h
@@ -0,0 +1,36 @@
+#ifndef KERNEL_VIDEO_VGA
+#define KERNEL_VIDEO_VGA
+
+#include <stddef.h>
+#include <stdint.h>
+
+/* Hardware text mode color constants. */
+enum vga_colors {
+	VGA_COLOR_BLACK = 0,
+	VGA_COLOR_BLUE = 1,
+	VGA_COLOR_GREEN = 2,
+	VGA_COLOR_CYAN = 3,
+	VGA_COLOR_RED = 4,
+	VGA_COLOR_MAGENTA = 5,
+	VGA_COLOR_BROWN = 6,
+	VGA_COLOR_LIGHT_GREY = 7,
+	VGA_COLOR_DARK_GREY = 8,
+	VGA_COLOR_LIGHT_BLUE = 9,
+	VGA_COLOR_LIGHT_GREEN = 10,
+	VGA_COLOR_LIGHT_CYAN = 11,
+	VGA_COLOR_LIGHT_RED = 12,
+	VGA_COLOR_LIGHT_MAGENTA = 13,
+	VGA_COLOR_LIGHT_BROWN = 14,
+	VGA_COLOR_WHITE = 15
+};
+
+uint8_t vga_entry_color(enum vga_colors fg, enum vga_colors bg);
+uint16_t vga_entry(uint8_t uc, uint8_t color);
+void vga_init(void);
+void vga_setcolor(uint8_t color);
+void vga_scroll(size_t lines);
+void vga_putchar(char c);
+void vga_write(const char *str, size_t size);
+void vga_print(const char *str);
+
+#endif /* KERNEL_VIDEO_VGA */