root / lab5 / graphics.c @ 103
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| 1 | 95 | up20180655 | #include "graphics.h" |
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| 2 | #include "graphics_macros.h" |
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| 3 | #include "errors.h" |
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| 4 | |||
| 5 | #include <lcom/lcf.h> |
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| 6 | |||
| 7 | #include <stdio.h> |
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| 8 | |||
| 9 | static void *video_mem; /** @brief Frame-buffer VM address */ |
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| 10 | 103 | up20180655 | static vbe_mode_info_t vbe_mem_info;
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| 11 | 99 | up20180655 | static mmap_t mem_map;
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| 12 | 95 | up20180655 | |
| 13 | 99 | up20180655 | int (get_permission)(unsigned int base_addr, unsigned int size) { |
| 14 | 95 | up20180655 | struct minix_mem_range mmr;
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| 15 | 99 | up20180655 | mmr.mr_base = base_addr; |
| 16 | mmr.mr_limit = base_addr + size; |
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| 17 | return sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mmr);
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| 18 | } |
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| 19 | 95 | up20180655 | |
| 20 | 99 | up20180655 | int (get_permissions_first_mbyte)(void) { |
| 21 | return get_permission(MBYTE_BASE, MBYTE_SIZE);
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| 22 | } |
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| 23 | 95 | up20180655 | |
| 24 | 103 | up20180655 | int (vbe_get_mode_information)(uint16_t mode) {
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| 25 | memset(&vbe_mem_info, 0, sizeof(vbe_mode_info_t)); // reset values |
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| 26 | 95 | up20180655 | |
| 27 | 99 | up20180655 | struct reg86 reg_86;
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| 28 | 103 | up20180655 | memset(®_86, 0, sizeof(struct reg86)); // reset struct |
| 29 | 98 | up20180655 | |
| 30 | 99 | up20180655 | vbe_mode_info_t *virtual_addr = lm_alloc(sizeof(vbe_mode_info_t), &mem_map);
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| 31 | 98 | up20180655 | |
| 32 | 99 | up20180655 | reg_86.intno = VC_BIOS_SERV; |
| 33 | reg_86.ah = VBE_CALL; |
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| 34 | reg_86.al = VBE_MD_INFO; |
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| 35 | reg_86.cx = mode; |
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| 36 | reg_86.es = PB2BASE(mem_map.phys); |
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| 37 | reg_86.di = PB2OFF(mem_map.phys); |
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| 38 | // BIOS CALL
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| 39 | if (sys_int86(®_86)) {
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| 40 | printf("%s: sys_int86 failed\n", __func__);
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| 41 | if (free_memory()) {
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| 42 | printf("%s: lm_free failed\n", __func__);
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| 43 | return LCF_ERROR;
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| 44 | } |
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| 45 | return BIOS_CALL_ERROR;
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| 46 | 95 | up20180655 | } |
| 47 | |||
| 48 | 103 | up20180655 | memcpy((void*)&vbe_mem_info, (void*)virtual_addr, mem_map.size); |
| 49 | 99 | up20180655 | return SUCCESS;
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| 50 | } |
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| 51 | 95 | up20180655 | |
| 52 | 103 | up20180655 | phys_bytes get_phys_addr(void) {
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| 53 | return vbe_mem_info.PhysBasePtr;
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| 54 | } |
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| 55 | |||
| 56 | unsigned int get_vram_size(void) { |
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| 57 | return vbe_mem_info.XResolution * vbe_mem_info.YResolution * ((vbe_mem_info.BitsPerPixel + 7) >> 3); |
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| 58 | } |
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| 59 | |||
| 60 | uint16_t get_XRes(void) {
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| 61 | return vbe_mem_info.XResolution;
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| 62 | } |
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| 63 | |||
| 64 | uint16_t get_YRes(void) {
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| 65 | return vbe_mem_info.YResolution;
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| 66 | } |
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| 67 | |||
| 68 | uint16_t get_bits_pixel(void) {
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| 69 | return vbe_mem_info.BitsPerPixel;
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| 70 | } |
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| 71 | |||
| 72 | int (map_vram)(void) { |
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| 73 | 99 | up20180655 | int r;
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| 74 | 103 | up20180655 | unsigned int vram_base = get_phys_addr(); |
| 75 | unsigned int vram_size = get_vram_size(); |
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| 76 | 99 | up20180655 | if ((r = get_permission(vram_base, vram_size)))
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| 77 | panic("%s: sys_privctl (ADD MEM) failed: %d\n", __func__, r);
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| 78 | 95 | up20180655 | |
| 79 | 99 | up20180655 | video_mem = vm_map_phys(SELF, (void *)vram_base, vram_size);
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| 80 | 95 | up20180655 | |
| 81 | if (video_mem == MAP_FAILED)
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| 82 | 99 | up20180655 | panic("%s: couldn't map video memory.", __func__);
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| 83 | 95 | up20180655 | |
| 84 | 99 | up20180655 | return SUCCESS;
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| 85 | } |
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| 86 | |||
| 87 | int (free_memory)(void) { |
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| 88 | 103 | up20180655 | return !lm_free(&mem_map);
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| 89 | 99 | up20180655 | } |
| 90 | |||
| 91 | int (set_graphics_mode)(uint16_t mode) {
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| 92 | struct reg86 reg_86;
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| 93 | |||
| 94 | 103 | up20180655 | memset(®_86, 0, sizeof(struct reg86)); // reset struct |
| 95 | 96 | up20180655 | |
| 96 | 99 | up20180655 | // Set Reg86
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| 97 | 98 | up20180655 | reg_86.intno = VC_BIOS_SERV; |
| 98 | reg_86.ah = VBE_CALL; |
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| 99 | reg_86.al = SET_VBE_MD; |
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| 100 | reg_86.bx = mode | LINEAR_FRAME_BUFFER_MD; |
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| 101 | 96 | up20180655 | |
| 102 | 98 | up20180655 | // BIOS CALL
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| 103 | if (sys_int86(®_86)) {
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| 104 | printf("%s: sys_int86 failed\n", __func__);
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| 105 | return BIOS_CALL_ERROR;
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| 106 | } |
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| 107 | 99 | up20180655 | |
| 108 | 95 | up20180655 | return SUCCESS;
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| 109 | } |
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| 110 | 102 | up20180642 | |
| 111 | int (vg_draw_hline)(uint16_t x, uint16_t y, uint16_t len, uint32_t color){
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| 112 | /*
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| 113 | uint8_t color8 = color;
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| 114 | for(uint16_t l = 0; l < len; ++l){
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| 115 | *(video_mem+y*1024+x+len) = color8;
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| 116 | }*/
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| 117 | return 0; |
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| 118 | } |