Rev 54 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 54 | pj | 1 | /* VGAlib version 1.2 - (c) 1993 Tommy Frandsen */ |
| 2 | /* */ |
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| 3 | /* This library is free software; you can redistribute it and/or */ |
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| 4 | /* modify it without any restrictions. This library is distributed */ |
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| 5 | /* in the hope that it will be useful, but without any warranty. */ |
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| 6 | |||
| 7 | /* Multi-chipset support Copyright 1993 Harm Hanemaayer */ |
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| 8 | /* partially copyrighted (C) 1993 by Hartmut Schirmer */ |
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| 9 | |||
| 10 | /* Converted to especially ugly code and seriously hacked for Mach32: */ |
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| 11 | /* M. Weller in 1994 */ |
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| 12 | #include <stdlib.h> |
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| 13 | |||
| 14 | #include "vga.h" |
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| 15 | #include "vgaio.h" |
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| 16 | #include "libvga.h" |
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| 17 | #include "driver.h" |
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| 18 | |||
| 19 | /* |
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| 20 | * In grayscale mode, we convert RGB colors to a Y component on the |
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| 21 | * green-channel (the Y component is used in grayscale TV sets for the |
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| 22 | * same purpose and corresponds to the "brightness" of the color as |
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| 23 | * perceived by the human eye. In order to be able to return to the |
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| 24 | * user the original green-component, we save a backup copy of the |
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| 25 | * green channel in __svgalib_green_backup: |
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| 26 | */ |
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| 27 | int __svgalib_green_backup[256]; |
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| 28 | |||
| 29 | |||
| 30 | static int set_lut(int index, int red, int green, int blue) |
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| 31 | { |
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| 32 | if (__svgalib_novga) return 1; |
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| 33 | |||
| 34 | /* prevents lockups */ |
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| 35 | if ((__svgalib_chipset == MACH64)) { |
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| 36 | outb(0x02ec+0x5c00,index); |
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| 37 | outb(0x02ec+0x5c01,red); |
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| 38 | outb(0x02ec+0x5c01,green); |
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| 39 | outb(0x02ec+0x5c01,blue); |
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| 40 | return 0; |
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| 41 | } |
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| 42 | |||
| 43 | __svgalib_outpal(index,red,green,blue); |
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| 44 | |||
| 45 | return 0; |
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| 46 | } |
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| 47 | |||
| 48 | |||
| 49 | static int get_lut(int index, int *red, int *green, int *blue) |
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| 50 | { |
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| 51 | if (__svgalib_novga) return 0; |
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| 52 | |||
| 53 | /* prevents lockups on mach64 */ |
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| 54 | if ((__svgalib_chipset == MACH64)) { |
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| 55 | outb(0x02ec+0x5c00,index); |
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| 56 | *red=port_in(0x02ec+0x5c01); |
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| 57 | *green=port_in(0x02ec+0x5c01); |
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| 58 | *blue=port_in(0x02ec+0x5c01); |
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| 59 | return 0; |
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| 60 | } |
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| 61 | |||
| 62 | __svgalib_inpal(index,red,green,blue); |
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| 63 | |||
| 64 | return 0; |
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| 65 | } |
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| 66 | |||
| 67 | int vga_setpalette(int index, int red, int green, int blue) |
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| 68 | { |
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| 69 | |||
| 81 | giacomo | 70 | DTP(("setpalette %i %i %i %i\n",index,red,green,blue)); |
| 54 | pj | 71 | |
| 72 | if (__svgalib_grayscale) { |
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| 73 | if ((unsigned) index >= sizeof(__svgalib_green_backup) / sizeof(__svgalib_green_backup[0])) { |
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| 81 | giacomo | 74 | cprintf("vga_setpalette: color index %d out of range\n", index); |
| 54 | pj | 75 | } |
| 76 | __svgalib_green_backup[index] = green; |
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| 77 | |||
| 78 | green = 0.299 * red + 0.587 * green + 0.114 * blue; |
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| 79 | if (green < 0) |
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| 80 | green = 0; |
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| 81 | if (green > 255) |
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| 82 | green = 255; |
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| 83 | } |
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| 84 | |||
| 85 | if (__svgalib_driverspecs->emul && __svgalib_driverspecs->emul->setpalette) { |
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| 86 | return __svgalib_driverspecs->emul->setpalette(index, red, green, blue); |
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| 87 | } else { |
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| 88 | return set_lut(index, red, green, blue); |
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| 89 | } |
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| 90 | } |
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| 91 | |||
| 92 | int vga_getpalette(int index, int *red, int *green, int *blue) |
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| 93 | { |
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| 94 | if (__svgalib_driverspecs->emul && __svgalib_driverspecs->emul->getpalette) |
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| 95 | __svgalib_driverspecs->emul->getpalette(index, red, green, blue); |
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| 96 | else get_lut(index, red, green, blue); |
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| 97 | if (__svgalib_grayscale) { |
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| 98 | if ((unsigned) index >= sizeof(__svgalib_green_backup) / sizeof(__svgalib_green_backup[0])) { |
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| 81 | giacomo | 99 | cprintf("vga_getpalette: color index %d out of range\n", index); |
| 54 | pj | 100 | } |
| 101 | *green = __svgalib_green_backup[index]; |
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| 102 | } |
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| 103 | return 0; |
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| 104 | } |
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| 105 | |||
| 106 | |||
| 107 | int vga_setpalvec(int start, int num, int *pal) |
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| 108 | { |
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| 109 | int i; |
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| 110 | |||
| 81 | giacomo | 111 | DTP(("setpalvec %i %i %x\n",start,num,pal)); |
| 54 | pj | 112 | |
| 113 | if ((__svgalib_driverspecs->emul && __svgalib_driverspecs->emul->setpalette) || |
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| 114 | (__svgalib_outpal!=__svgalib_vga_outpal)) { |
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| 115 | for (i = start; i < start + num; ++i) { |
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| 116 | vga_setpalette(i, pal[0], pal[1], pal[2]); |
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| 117 | pal += 3; |
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| 118 | } |
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| 119 | } else { |
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| 120 | unsigned char string[768]; |
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| 121 | |||
| 122 | if ( num > 256 ) |
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| 123 | return 0; |
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| 124 | |||
| 125 | for (i = 0; i < num * 3; i++) |
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| 126 | string[i] = pal[i]; |
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| 127 | |||
| 128 | port_out ( start, 0x3c8 ); |
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| 129 | #if 0 |
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| 130 | port_rep_outb( string, num * 3, 0x3c9 ); |
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| 131 | #else |
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| 132 | for(i=0;i<num*3;i++)port_out(string[i],0x3c9); |
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| 133 | #endif |
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| 134 | } |
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| 135 | |||
| 136 | return num; |
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| 137 | } |
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| 138 | |||
| 139 | |||
| 140 | int vga_getpalvec(int start, int num, int *pal) |
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| 141 | { |
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| 142 | int i; |
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| 143 | |||
| 144 | for (i = start; i < start + num; ++i) { |
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| 145 | vga_getpalette(i, pal + 0, pal + 1, pal + 2); |
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| 146 | pal += 3; |
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| 147 | } |
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| 148 | return num; |
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| 149 | } |