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#ifndef MELVIX_VESA_H
#define MELVIX_VESA_H
#include <stdint.h>
#include <system.h>
/**
* The CPUs response to the 0x4F00 call
* Used to receive the supported video modes
*/
struct vbe_info {
char signature[4];
u16 version;
u32 oem;
u32 capabilities;
u32 video_modes;
u16 video_memory;
u16 software_rev;
u32 vendor;
u32 product_name;
u32 product_rev;
char reserved[222];
char oem_data[256];
} __attribute__((packed));
/**
* The CPUs response to the 0x4F01 call
* Used to get information about a specific video mode code
*/
struct vbe_mode_info_all {
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];
} __attribute__((packed));
struct vbe_mode_info {
u16 attributes;
u16 pitch;
u16 width;
u16 height;
u8 bpp;
u8 memory_model;
u32 framebuffer;
} __attribute__((packed));
/**
* Set the video mode to a specified resolution using
* a video mode code
* @param mode The requested video mode code from 0x4F00 call
*/
void vbe_set_mode(unsigned short mode);
/**
* Find the highest resolution using 0x4F00 and call
* vbe_set_mode using the video_modes far_ptr
*/
void set_optimal_resolution();
/**
* Sets one of the fonts inside the font header file
* @param height The desired font height
*/
void vesa_set_font(int height);
/**
* Draws a single char
* @param ch The char
*/
void vesa_draw_char(char ch);
/**
* Draw a char from keyboard
* @param ch The character
*/
void vesa_keyboard_char(char ch);
/**
* Draw a string in VESA mode
* @param data The string
*/
void vesa_draw_string(const char *data);
/**
* Draw a number in VESA mode
* @param n The number
*/
void vesa_draw_number(int n);
/**
* Updates the cursor
* @param x The X position
* @param y The Y position
*/
void vesa_draw_cursor(int x, int y);
/**
* Sets the color using a rgb number
* @param color The color
*/
void vesa_set_color(u32 color);
/**
* An enum with vesa colors
* From https://github.com/joshdick/onedark.vim/ License: MIT
*/
enum vesa_color {
vesa_black = 0x1d1f24,
vesa_red = 0xE06C75,
vesa_green = 0x98C379,
vesa_yellow = 0xE5C07B,
vesa_blue = 0x61AFEF,
vesa_magenta = 0xC678DD,
vesa_cyan = 0x56B6C2,
vesa_white = 0xABB2BF,
vesa_dark_black = 0x3E4452,
vesa_dark_red = 0xBE5046,
vesa_dark_green = 0x98C379,
vesa_dark_yellow = 0xD19A66,
vesa_dark_blue = 0x61AFEF,
vesa_dark_magenta = 0xC678DD,
vesa_dark_cyan = 0x56B6C2,
vesa_dark_white = 0x5C6370,
};
/**
* The default text color
*/
const u32 default_text_color;
/**
* The current text color (as normalized array)
*/
u32 terminal_color[3];
/**
* The current input
*/
char text[1024];
/**
* The current video mode
*/
struct vbe_mode_info *current_mode_info;
/**
* The width of the current video mode
*/
int vbe_width;
/**
* The height of the current video mode
*/
int vbe_height;
/**
* The pitch (bytes per line) of the current video mode
*/
int vbe_pitch;
/**
* The bytes per line (pixel width) of the current video mode
*/
int vbe_bpl;
/**
* The framebuffer interface
*/
u8 *fb;
u8 *cursor_buffer;
#endif
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