diff options
Diffstat (limited to 'src/kernel/graphics/vesa.h')
| -rw-r--r-- | src/kernel/graphics/vesa.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/kernel/graphics/vesa.h b/src/kernel/graphics/vesa.h new file mode 100644 index 0000000..9023029 --- /dev/null +++ b/src/kernel/graphics/vesa.h @@ -0,0 +1,70 @@ +#ifndef MELVIX_VESA_H +#define MELVIX_VESA_H + +#include <stdint.h> + +struct vbe_best { + uint8_t bpp; + uint16_t height; + uint16_t width; + uint32_t framebuffer; + uint32_t bytes_per_line; + uint32_t bytes_per_pixel; + uint32_t x_cur_max; + uint32_t y_cur_max; +} __attribute__ ((packed)); + +struct vbe_info { + char signature[4]; // must be "VESA" to indicate valid VBE support + uint16_t version; // VBE version; high byte is major version, low byte is minor version + uint32_t oem; // segment:offset pointer to OEM + uint32_t capabilities; // bitfield that describes card capabilities + uint32_t video_modes; // segment:offset pointer to list of supported video modes + uint16_t video_memory; // amount of video memory in 64KB blocks + uint16_t software_rev; // software revision + uint32_t vendor; // segment:offset to card vendor string + uint32_t product_name; // segment:offset to card model name + uint32_t product_rev; // segment:offset pointer to product revision + char reserved[222]; // reserved for future expansion + char oem_data[256]; // OEM BIOSes store their strings in this area +} __attribute__ ((packed)); + +struct vbe_mode_info { + uint16_t attributes; // deprecated, only bit 7 should be of interest to you, and it indicates the mode supports a linear frame buffer. + uint8_t window_a; // deprecated + uint8_t window_b; // deprecated + uint16_t granularity; // deprecated; used while calculating bank numbers + uint16_t window_size; + uint16_t segment_a; + uint16_t segment_b; + uint32_t win_func_ptr; // deprecated; used to switch banks from protected mode without returning to real mode + uint16_t pitch; // number of bytes per horizontal line + uint16_t width; // width in pixels + uint16_t height; // height in pixels + uint8_t w_char; // unused... + uint8_t y_char; // ... + uint8_t planes; + uint8_t bpp; // bits per pixel in this mode + uint8_t banks; // deprecated; total number of banks in this mode + uint8_t memory_model; + uint8_t bank_size; // deprecated; size of a bank, almost always 64 KB but may be 16 KB... + uint8_t image_pages; + uint8_t reserved0; + + uint8_t red_mask; + uint8_t red_position; + uint8_t green_mask; + uint8_t green_position; + uint8_t blue_mask; + uint8_t blue_position; + uint8_t reserved_mask; + uint8_t reserved_position; + uint8_t direct_color_attributes; + + uint32_t framebuffer; // physical address of the linear frame buffer; write here to draw to the screen + uint32_t off_screen_mem_off; + uint16_t off_screen_mem_size; // size of memory in the framebuffer but not being displayed on the screen + uint8_t reserved1[206]; +} __attribute__ ((packed)); + +#endif |