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1 #ifndef VBE_H_
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2 #define VBE_H_
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3
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4 #include "inttypes.h"
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5
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6 #ifdef __GNUC__
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7 #define PACKED __attribute__((packed))
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8 #else
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9 #define PACKED
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10 #endif
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11
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12 #define VBE_ATTR_LFB (1 << 7)
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13 #define VBE_MODE_LFB (1 << 14)
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14
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15 #pragma pack (push, 0)
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16 struct vbe_info {
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17 uint8_t sig[4];
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18 uint16_t version;
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19 uint32_t oem_str_ptr;
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20 uint8_t caps[4]; /* capabilities */
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21 uint32_t vid_mode_ptr; /* vbefarptr to video mode list */
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22 uint16_t total_mem; /* num of 64k mem blocks */
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23 uint16_t oem_sw_rev; /* VBE implementation software revision */
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24 uint32_t oem_vendor_name_ptr;
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25 uint32_t oem_product_name_ptr;
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26 uint32_t oem_product_rev_ptr;
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27 uint8_t reserved[222];
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28 uint8_t oem_data[256];
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29 } PACKED;
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30
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31 struct vbe_mode_info {
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32 uint16_t mode_attr;
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33 uint8_t wina_attr, winb_attr;
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34 uint16_t win_gran, win_size;
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35 uint16_t wina_seg, winb_seg;
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36 uint32_t win_func;
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37 uint16_t scanline_bytes;
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38
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39 /* VBE 1.2 and above */
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40 uint16_t xres, yres;
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41 uint8_t xcharsz, ycharsz;
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42 uint8_t num_planes;
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43 uint8_t bpp;
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44 uint8_t num_banks;
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45 uint8_t mem_model;
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46 uint8_t bank_size; /* bank size in KB */
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47 uint8_t num_img_pages;
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48 uint8_t reserved1;
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49
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50 /* direct color fields */
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51 uint8_t rmask_size, rpos;
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52 uint8_t gmask_size, gpos;
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53 uint8_t bmask_size, bpos;
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54 uint8_t xmask_size, xpos;
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55 uint8_t cmode_info; /* direct color mode attributes */
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56
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57 /* VBE 2.0 and above */
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58 uint32_t fb_addr; /* physical address of the linear framebuffer */
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59 uint32_t reserved2;
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60 uint16_t reserved3;
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61
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62 uint8_t reserved4[206];
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63 } PACKED;
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64 #pragma pack (pop)
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65
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66 struct vbe_info *vbe_get_info(void);
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67 struct vbe_mode_info *vbe_get_mode_info(int mode);
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68
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69 int vbe_set_mode(int mode);
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70
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71 int vbe_set_palette_bits(int bits);
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72 void vbe_set_palette(int idx, int *col, int count, int bits);
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73
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74 #define VBE_SET_DISP_START_NOW 0
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75 #define VBE_SET_DISP_START_VBLANK 0x80
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76 int vbe_set_disp_start(int x, int y, int when);
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77
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78 #define VBE_SCANLEN_PIXELS 0
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79 #define VBE_SCANLEN_BYTES 2
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80 int vbe_set_scanlen(int len, int mode);
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81 int vbe_get_scanlen(int mode);
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82
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83 void print_mode_info(FILE *fp, struct vbe_mode_info *modei);
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84
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85 #endif /* VBE_H_ */
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