| [80] | 1 | /********************************************************************** <BR>
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| 2 | This file is part of Crack dot Com's free source code release of
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| 3 | Golgotha. <a href="http://www.crack.com/golgotha_release"> <BR> for
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| 4 | information about compiling & licensing issues visit this URL</a>
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| 5 | <PRE> If that doesn't help, contact Jonathan Clark at
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| 6 | golgotha_source@usa.net (Subject should have "GOLG" in it)
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| 7 | ***********************************************************************/
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| 8 |
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| 9 | #include "software/r1_software_globals.hh"
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| 10 | #include "software/inline_fpu.hh"
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| 11 |
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| 12 | w32 *texture_affine_lit_starter()
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| 13 | {
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| 14 | w32 returnval;
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| 15 | _asm
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| 16 | {
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| 17 | mov eax,OFFSET dumb_addr
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| 18 | dumb_addr:
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| 19 | mov returnval,eax
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| 20 | }
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| 21 | return (w32 *)returnval;
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| 22 | }
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| 23 |
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| 24 | void texture_scanline_affine_lit(w16 *start_pixel,
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| 25 | sw32 start_x,
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| 26 | void *_left,//perspective_span *left,
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| 27 | sw32 width)
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| 28 | {
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| 29 | //temporary dwords for lighting calculations
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| 30 | w16 texel;
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| 31 | w32 t1,t2;
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| 32 | w32 l_lookup;
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| 33 |
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| 34 | start_pixel = (w16 *)((w8 *)start_pixel + start_x);
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| 35 |
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| 36 | affine_span *left = (affine_span *)_left;
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| 37 |
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| 38 | left_s = left->s + cur_grads.s_adjust;
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| 39 | left_t = left->t + cur_grads.t_adjust;
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| 40 | left_l = left->l;
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| 41 |
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| 42 | temp_dsdx = qftoi(cur_grads.dsdx);
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| 43 | temp_dtdx = qftoi(cur_grads.dtdx);
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| 44 |
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| 45 | width_global = width;
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| 46 |
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| 47 | while (width_global)
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| 48 | {
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| 49 | texel = *(r1_software_texture_ptr + (left_s>>16) + ((left_t>>16)<<r1_software_twidth_log2));
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| 50 |
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| 51 | l_lookup = left_l & (NUM_LIGHT_SHADES<<8);
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| 52 |
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| 53 | //lookup low bits
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| 54 | t1 = ((w32 *)(0xDEADBEEF))[l_lookup + (texel & 0xFF)];
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| 55 |
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| 56 | //lookup high bits
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| 57 | t2 = ((w32 *)(0xDEADBEEF)+ctable_size)[l_lookup + (texel>>8)];
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| 58 |
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| 59 | *start_pixel = (w16)(t1+t2);
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| 60 |
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| 61 | start_pixel++;
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| 62 |
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| 63 | left_s += temp_dsdx;
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| 64 | left_t += temp_dtdx;
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| 65 | left_l += dldx_fixed;
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| 66 |
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| 67 | width_global--;
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| 68 | }
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| 69 | }
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| 70 |
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| 71 | w32 *texture_affine_lit_sentinel()
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| 72 | {
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| 73 | w32 returnval;
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| 74 | _asm
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| 75 | {
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| 76 | mov eax,OFFSET dumb_addr
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| 77 | dumb_addr:
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| 78 | mov returnval,eax
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| 79 | }
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| 80 | return (w32 *)returnval;
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| 81 | }
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| 82 |
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| 83 | void insert_color_modify_address_low(w32 *address);
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| 84 | void insert_color_modify_address_high(w32 *address);
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| 85 | extern w32 color_modify_list[];
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| 86 | extern sw32 num_color_modifies;
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| 87 |
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| 88 | void setup_color_modify_affine_lit()
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| 89 | {
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| 90 | w32 *stop = texture_affine_lit_sentinel();
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| 91 |
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| 92 | w32 *search = texture_affine_lit_starter();
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| 93 | //start searching for 0xDEADBEEF
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| 94 | while (search < stop)
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| 95 | {
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| 96 | //casting craziness
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| 97 | search = (w32 *)((w8 *)search + 1);
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| 98 | if (*search==0xDEADBEEF)
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| 99 | {
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| 100 | insert_color_modify_address_low(search);
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| 101 | }
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| 102 | else
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| 103 | if (*search==(0xDEADBEEF + ctable_size_bytes))
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| 104 | {
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| 105 | insert_color_modify_address_high(search);
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| 106 | }
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| 107 | }
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| 108 | } |
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