fix RNG with zero seed, rename VGA->GFX

1 files changed, 40 insertions, 0 deletions

diff --git a/drivers/include/gfx.h b/drivers/include/gfx.h
new file mode 100644
index 0000000..bafd7a3
--- /dev/null
+++ b/drivers/include/gfx.h
@@ -0,0 +1,40 @@
+#include <stdint.h>
+
+enum vga_color_t {
+    VGA_BLACK = 0,
+    VGA_BLUE = 1,
+    VGA_GREEN = 2,
+    VGA_CYAN = 3,
+    VGA_RED = 4,
+    VGA_MAGENTA = 5,
+    VGA_BROWN = 6,
+    VGA_LIGHT_GRAY = 7,
+    VGA_DARK_GRAY = 8,
+    VGA_LIGHT_BLUE = 9,
+    VGA_LIGHT_GREEN = 10,
+    VGA_LIGHT_CYAN = 11,
+    VGA_LIGHT_RED = 12,
+    VGA_LIGHT_MAGENTA = 13,
+    VGA_LIGHT_BROWN = 14,
+    VGA_WHITE = 15
+};
+
+#define VGA_WIDTH  80
+#define VGA_HEIGHT 25
+
+#define VGA_MAKE_COLOR(fg, bg) (fg | bg << 4)
+#define VGA_MAKE_ENTRY(ch, col) (((uint16_t)ch)|((uint16_t)col<<8))
+#define VGA_RGBPACK(r, g, b)  ((r << 16)|(g << 8)|(b << 0))
+
+#define GFX_WHITE 0xFFFFFF
+#define GFX_BLACK 0x000000
+
+struct vbe_info_t;
+
+void gfx_init(struct vbe_info_t *vbe_mode_info);
+
+void gfx_drawpixel(int x, int y, uint32_t color);
+
+void gfx_clear(uint32_t color);
+
+extern const uint16_t *gfx_width, *gfx_height;