1 #include <stdlib.h> 2 #include <string.h> 3 4 #include "lua.h" 5 #include "lauxlib.h" 6 #include "lualib.h" 7 #include "../../include/console.h" 8 #include "../../lib/sys/vesa/vesa.h" 9 #include "../../lib/sys/vesa/video.h" 10 11 int vesacon_load_background(const char *filename); 12 13 static int vesa_getmodes(lua_State *L) 14 { 15 com32sys_t rm; 16 uint16_t mode, *mode_ptr; 17 struct vesa_general_info *gi; 18 struct vesa_mode_info *mi; 19 int nmode = 1; 20 int rv = -1; 21 22 gi = lmalloc(sizeof *gi); 23 if (!gi) 24 return -1; 25 26 mi = lmalloc(sizeof *mi); 27 if (!mi) 28 goto out; 29 30 memset(&rm, 0, sizeof(rm)); 31 memset(gi, 0, sizeof *gi); 32 33 gi->signature = VBE2_MAGIC; /* Get VBE2 extended data */ 34 rm.eax.w[0] = 0x4F00; /* Get SVGA general information */ 35 rm.edi.w[0] = OFFS(gi); 36 rm.es = SEG(gi); 37 __intcall(0x10, &rm, &rm); 38 39 if ( rm.eax.w[0] != 0x004F ) 40 goto out; /* Function call failed */ 41 if ( gi->signature != VESA_MAGIC ) { 42 rv = -2; /* No magic */ 43 goto out; 44 } 45 if ( gi->version < 0x0102 ) { 46 rv = -3; /* VESA 1.2+ required */ 47 goto out; 48 } 49 50 lua_newtable(L); /* list of modes */ 51 52 /* Copy general info */ 53 memcpy(&__vesa_info.gi, gi, sizeof *gi); 54 55 /* Search for a 640x480 mode with a suitable color and memory model... */ 56 57 mode_ptr = GET_PTR(gi->video_mode_ptr); 58 59 while ((mode = *mode_ptr++) != 0xFFFF) { 60 mode &= 0x1FF; /* The rest are attributes of sorts */ 61 62 printf("Found mode: 0x%04x (%dx%dx%d)\n", mode, mi->h_res, mi->v_res, mi->bpp); 63 64 memset(&rm, 0, sizeof(rm)); 65 memset(mi, 0, sizeof *mi); 66 rm.eax.w[0] = 0x4F01; /* Get SVGA mode information */ 67 rm.ecx.w[0] = mode; 68 rm.edi.w[0] = OFFS(mi); 69 rm.es = SEG(mi); 70 __intcall(0x10, &rm, &rm); 71 72 /* Must be a supported mode */ 73 if ( rm.eax.w[0] != 0x004f ) 74 continue; 75 76 lua_pushnumber(L, nmode++); 77 lua_newtable(L); /* mode info */ 78 79 lua_pushstring(L, "mode"); 80 lua_pushnumber(L, mode); 81 lua_settable(L,-3); 82 83 lua_pushstring(L, "hres"); 84 lua_pushnumber(L, mi->h_res); 85 lua_settable(L,-3); 86 87 lua_pushstring(L, "vres"); 88 lua_pushnumber(L, mi->v_res); 89 lua_settable(L,-3); 90 91 lua_pushstring(L, "bpp"); 92 lua_pushnumber(L, mi->bpp); 93 lua_settable(L,-3); 94 95 lua_settable(L, -3); /* add to mode list */ 96 97 } 98 99 rv = 1; 100 out: 101 lfree(mi); 102 lfree(gi); 103 return rv; 104 } 105 106 107 static int vesa_setmode(lua_State *L) 108 { 109 /* Preventing GCC to complain about unused L*/ 110 L=L; 111 openconsole(&dev_rawcon_r, &dev_vesaserial_w); 112 113 return 0; 114 } 115 116 117 static int vesa_load_background(lua_State *L) 118 { 119 const char *filename = luaL_checkstring(L, 1); 120 121 vesacon_load_background(filename); 122 123 return 0; 124 } 125 126 static const luaL_Reg vesalib[] = { 127 {"getmodes", vesa_getmodes}, 128 {"setmode", vesa_setmode}, 129 {"load_background", vesa_load_background}, 130 {NULL, NULL} 131 }; 132 133 /* This defines a function that opens up your library. */ 134 135 LUALIB_API int luaopen_vesa (lua_State *L) { 136 luaL_newlib(L, vesalib); 137 return 1; 138 } 139 140
