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Rev | Author | Line No. | Line |
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6141 | IgorA | 1 | ; |
2 | ; Опции для функций: |
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3 | ; |
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4 | ;INTERP_Z - использование Z буфера (всегда включено) |
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5 | ;INTERP_RGB - сглажевание цветов |
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6 | ;INTERP_ST - наложение текстуры в ортогональной проэкции |
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7 | ;INTERP_STZ - наложение текстуры в перспективной проэкции |
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8 | ; |
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9 | ; Функции рисования треугольников: |
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10 | ; |
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11 | ;ZB_fillTriangleFlat - треугольник одного цвета |
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12 | ;ZB_fillTriangleSmooth - треугольник с разными цветами вершин |
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13 | ;ZB_fillTriangleMapping - треугольник с текстурой в ортогональной проэкции |
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14 | ;ZB_fillTriangleMappingPerspective - треугольник с текстурой в перспективной проэкции |
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15 | ; |
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5153 | IgorA | 16 | |
6141 | IgorA | 17 | macro calc_d1d2 f, r1, r2 |
18 | { |
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19 | fld dword[fdy2] |
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20 | fmul st0,st2 |
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21 | fld dword[fdy1] |
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22 | fmul st0,st2 |
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23 | fsubp |
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24 | f#stp dword[r1] ;r1 = (fdy2*d1 - fdy1*d2) |
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25 | fld dword[fdx1] |
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26 | fmulp |
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27 | fld dword[fdx2] |
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28 | fmul st0,st2 |
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29 | fsubp |
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30 | f#stp dword[r2] ;r2 = (fdx1*d2 - fdx2*d1) |
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31 | ffree st0 ;d1 |
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32 | fincstp |
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33 | } |
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34 | |||
5153 | IgorA | 35 | INTERP_Z equ 1 |
36 | |||
37 | macro DRAW_INIT |
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38 | { |
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39 | if TGL_FEATURE_RENDER_BITS eq 24 |
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40 | mov ecx,[p2] |
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41 | mov eax,[ecx+offs_zbup_r] |
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5208 | IgorA | 42 | mov [colorR],ah ;colorR=p2.r>>8 |
5153 | IgorA | 43 | mov eax,[ecx+offs_zbup_g] |
5208 | IgorA | 44 | mov [colorG],ah ;colorG=p2.g>>8 |
5153 | IgorA | 45 | mov eax,[ecx+offs_zbup_b] |
5208 | IgorA | 46 | mov [colorB],ah ;colorB=p2.b>>8 |
5187 | IgorA | 47 | ;else |
6126 | IgorA | 48 | ;color=RGB_TO_PIXEL(p2.r,p2.g,p2.b) |
5153 | IgorA | 49 | end if |
50 | } |
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51 | |||
52 | macro PUT_PIXEL _a |
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53 | { |
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5175 | IgorA | 54 | local .end_0 |
55 | mov eax,[z] |
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6126 | IgorA | 56 | shr eax,ZB_POINT_Z_FRAC_BITS |
57 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
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5175 | IgorA | 58 | jl .end_0 |
59 | ;edi = pp |
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6126 | IgorA | 60 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 61 | if TGL_FEATURE_RENDER_BITS eq 24 |
6111 | IgorA | 62 | mov al,[colorR] |
63 | mov ah,[colorG] |
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64 | mov word[edi+3*_a],ax |
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65 | mov al,[colorB] |
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66 | mov byte[edi+3*_a +2],al |
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5187 | IgorA | 67 | ;else |
6126 | IgorA | 68 | ;pp[_a]=color |
5153 | IgorA | 69 | end if |
5175 | IgorA | 70 | .end_0: |
71 | mov eax,[dzdx] |
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72 | add [z],eax |
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5153 | IgorA | 73 | } |
74 | |||
6134 | IgorA | 75 | align 16 |
5153 | IgorA | 76 | proc ZB_fillTriangleFlat, zb:dword, p0:dword, p1:dword, p2:dword |
77 | locals |
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78 | if TGL_FEATURE_RENDER_BITS eq 24 |
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79 | colorR db ? |
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80 | colorG db ? |
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81 | colorB db ? ;unsigned char |
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82 | else |
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83 | color dd ? ;int |
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84 | end if |
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85 | include 'ztriangle.inc' |
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86 | |||
87 | ; |
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88 | ; Smooth filled triangle. |
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89 | ; The code below is very tricky :) |
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90 | ; |
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91 | |||
92 | INTERP_Z equ 1 |
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93 | INTERP_RGB equ 1 |
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94 | |||
95 | macro DRAW_INIT |
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96 | { |
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97 | } |
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98 | |||
99 | macro PUT_PIXEL _a |
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100 | { |
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5187 | IgorA | 101 | local .end_0 |
5175 | IgorA | 102 | mov eax,[z] |
103 | shr eax,ZB_POINT_Z_FRAC_BITS |
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6126 | IgorA | 104 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
5187 | IgorA | 105 | jl .end_0 |
106 | ;edi = pp |
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6126 | IgorA | 107 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 108 | if TGL_FEATURE_RENDER_BITS eq 24 |
6111 | IgorA | 109 | mov ebx,[or1] |
110 | mov eax,[og1] |
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111 | mov al,bh |
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112 | mov word[edi+3*_a],ax |
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5187 | IgorA | 113 | mov eax,[ob1] |
114 | mov byte[edi+3*_a +2],ah |
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115 | end if |
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6111 | IgorA | 116 | ;if TGL_FEATURE_RENDER_BITS eq 32 |
6126 | IgorA | 117 | ;pp[_a] = RGB_TO_PIXEL(or1, og1, ob1) |
6111 | IgorA | 118 | ;end if |
5187 | IgorA | 119 | .end_0: |
5175 | IgorA | 120 | mov eax,[dzdx] |
121 | add [z],eax |
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5187 | IgorA | 122 | mov eax,[dgdx] |
123 | add [og1],eax |
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124 | mov eax,[drdx] |
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125 | add [or1],eax |
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126 | mov eax,[dbdx] |
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127 | add [ob1],eax |
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5153 | IgorA | 128 | } |
129 | |||
6134 | IgorA | 130 | align 16 |
5153 | IgorA | 131 | proc ZB_fillTriangleSmooth, zb:dword, p0:dword, p1:dword, p2:dword |
132 | locals |
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133 | include 'ztriangle.inc' |
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134 | |||
6134 | IgorA | 135 | align 16 |
6243 | IgorA | 136 | proc ZB_setTexture uses eax ebx, zb:dword, texture:dword,\ |
137 | s_bound:dword, t_bound:dword, s_log2:dword |
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5153 | IgorA | 138 | mov eax,[zb] |
139 | mov ebx,[texture] |
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140 | mov dword[eax+offs_zbuf_current_texture],ebx |
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6243 | IgorA | 141 | mov ebx,[s_log2] |
142 | mov dword[eax+offs_zbuf_s_log2],ebx |
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143 | mov ebx,[s_bound] |
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144 | mov dword[eax+offs_zbuf_s_bound],ebx |
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145 | mov ebx,[t_bound] |
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146 | mov dword[eax+offs_zbuf_t_bound],ebx |
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5153 | IgorA | 147 | ret |
148 | endp |
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149 | |||
150 | INTERP_Z equ 1 |
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151 | INTERP_ST equ 1 |
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152 | |||
153 | macro DRAW_INIT |
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154 | { |
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5187 | IgorA | 155 | mov eax,[zb] |
6243 | IgorA | 156 | mov ebx,[eax+offs_zbuf_current_texture] |
157 | mov [texture],ebx |
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158 | mov ebx,[eax+offs_zbuf_s_log2] |
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159 | mov [s_log2],ebx ;s_log2 = zb.s_log2 |
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160 | mov ebx,[eax+offs_zbuf_s_bound] |
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161 | mov [s_bound],ebx ;s_bound = zb.s_bound |
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162 | mov ebx,[eax+offs_zbuf_t_bound] |
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163 | mov [t_bound],ebx ;t_bound = zb.t_bound |
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5153 | IgorA | 164 | } |
165 | |||
166 | macro PUT_PIXEL _a |
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167 | { |
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5187 | IgorA | 168 | local .end_0 |
169 | mov eax,[z] |
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170 | shr eax,ZB_POINT_Z_FRAC_BITS |
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6126 | IgorA | 171 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
5187 | IgorA | 172 | jl .end_0 |
5922 | IgorA | 173 | ;edi = pp |
6126 | IgorA | 174 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 175 | if TGL_FEATURE_RENDER_BITS eq 24 |
6108 | IgorA | 176 | mov ebx,[t] |
6243 | IgorA | 177 | and ebx,[t_bound] |
178 | mov ecx,[s_log2] |
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179 | shr ebx,cl ;(t & t_bound) >> s_log2 |
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6141 | IgorA | 180 | mov eax,[s] |
6243 | IgorA | 181 | and eax,[s_bound] |
182 | shr eax,ZB_POINT_TEXEL_SIZE |
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6141 | IgorA | 183 | or ebx,eax |
6108 | IgorA | 184 | imul ebx,3 |
185 | add ebx,[texture] ;ptr = texture + (((t & 0x3fc00000) | s) >> 14) * 3 |
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186 | mov ax,word[ebx] |
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187 | mov word[edi+3*_a],ax ;pp[3 * _a]= ptr[0,1] |
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188 | mov al,byte[ebx+2] |
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189 | mov byte[edi+3*_a +2],al ;pp[3 * _a + 2]= ptr[2] |
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5153 | IgorA | 190 | else |
6126 | IgorA | 191 | ;pp[_a]=texture[((t & 0x3FC00000) | s) >> 14] |
5153 | IgorA | 192 | end if |
5187 | IgorA | 193 | .end_0: |
5175 | IgorA | 194 | mov eax,[dzdx] |
195 | add [z],eax |
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196 | mov eax,[dsdx] |
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197 | add [s],eax |
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198 | mov eax,[dtdx] |
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199 | add [t],eax |
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5153 | IgorA | 200 | } |
201 | |||
6134 | IgorA | 202 | align 16 |
5153 | IgorA | 203 | proc ZB_fillTriangleMapping, zb:dword, p0:dword, p1:dword, p2:dword |
204 | locals |
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205 | texture dd ? ;PIXEL* |
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6243 | IgorA | 206 | s_log2 dd ? ;unsigned int |
207 | s_bound dd ? ;unsigned int |
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208 | t_bound dd ? ;unsigned int |
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5153 | IgorA | 209 | include 'ztriangle.inc' |
210 | |||
211 | ; |
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212 | ; Texture mapping with perspective correction. |
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213 | ; We use the gradient method to make less divisions. |
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214 | ; TODO: pipeline the division |
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215 | ; |
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216 | |||
217 | INTERP_Z equ 1 |
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218 | INTERP_STZ equ 1 |
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219 | |||
220 | NB_INTERP equ 8 |
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221 | |||
222 | macro DRAW_INIT |
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223 | { |
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5187 | IgorA | 224 | mov eax,[zb] |
6243 | IgorA | 225 | mov ebx,[eax+offs_zbuf_current_texture] |
226 | mov [texture],ebx |
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227 | mov ebx,[eax+offs_zbuf_s_log2] |
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228 | mov [s_log2],ebx ;s_log2 = zb.s_log2 |
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229 | mov ebx,[eax+offs_zbuf_s_bound] |
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230 | mov [s_bound],ebx ;s_bound = zb.s_bound |
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231 | mov ebx,[eax+offs_zbuf_t_bound] |
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232 | mov [t_bound],ebx ;t_bound = zb.t_bound |
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6108 | IgorA | 233 | mov dword[esp-4],NB_INTERP |
234 | fild dword[esp-4] |
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5187 | IgorA | 235 | fild dword[dzdx] |
6108 | IgorA | 236 | fst dword[fdzdx] ;fdzdx = (float)dzdx |
237 | fmul st0,st1 |
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238 | fstp dword[fndzdx] ;fndzdx = NB_INTERP * fdzdx |
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239 | fld dword[fdzdx] |
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240 | fmul st0,st1 |
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241 | fstp dword[ndszdx] ;ndszdx = NB_INTERP * dszdx |
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242 | fmul dword[dtzdx] |
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243 | fstp dword[ndtzdx] ;ndtzdx = NB_INTERP * dtzdx |
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5153 | IgorA | 244 | } |
245 | |||
246 | macro PUT_PIXEL _a |
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247 | { |
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5187 | IgorA | 248 | local .end_0 |
249 | mov eax,[z] |
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250 | shr eax,ZB_POINT_Z_FRAC_BITS |
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6126 | IgorA | 251 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
5187 | IgorA | 252 | jl .end_0 |
5922 | IgorA | 253 | ;edi = pp |
6126 | IgorA | 254 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 255 | if TGL_FEATURE_RENDER_BITS eq 24 |
6108 | IgorA | 256 | mov ebx,[t] |
6243 | IgorA | 257 | and ebx,[t_bound] |
258 | mov ecx,[s_log2] |
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259 | shr ebx,cl ;(t & t_bound) >> s_log2 |
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6108 | IgorA | 260 | mov eax,[s] |
6243 | IgorA | 261 | and eax,[s_bound] |
262 | shr eax,ZB_POINT_TEXEL_SIZE |
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6108 | IgorA | 263 | or ebx,eax |
264 | imul ebx,3 |
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265 | add ebx,[texture] ;ptr = texture + (((t & 0x3fc00000) | (s & 0x003FC000)) >> 14) * 3 |
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266 | mov ax,word[ebx] |
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267 | mov word[edi+3*_a],ax ;pp[3 * _a]= ptr[0,1] |
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268 | mov al,byte[ebx+2] |
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269 | mov byte[edi+3*_a +2],al ;pp[3 * _a + 2]= ptr[2] |
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5153 | IgorA | 270 | else |
271 | ; pp[_a]=*(PIXEL *)((char *)texture+ |
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5187 | IgorA | 272 | ; (((t & 0x3FC00000) | (s & 0x003FC000)) >> (17 - PSZSH))); |
5153 | IgorA | 273 | end if |
5187 | IgorA | 274 | .end_0: |
5175 | IgorA | 275 | mov eax,[dzdx] |
276 | add [z],eax |
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277 | mov eax,[dsdx] |
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278 | add [s],eax |
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279 | mov eax,[dtdx] |
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280 | add [t],eax |
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5153 | IgorA | 281 | } |
282 | |||
5175 | IgorA | 283 | DRAW_LINE_M equ 1 |
284 | |||
6113 | IgorA | 285 | macro DRAW_LINE |
5175 | IgorA | 286 | { |
287 | if TGL_FEATURE_RENDER_BITS eq 24 |
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6108 | IgorA | 288 | mov eax,[x2] |
289 | sar eax,16 |
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6113 | IgorA | 290 | mov edi,[x1] |
291 | sub eax,edi |
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6111 | IgorA | 292 | mov [n],eax ;n = (x2 >> 16) - x1 |
6134 | IgorA | 293 | fld1 |
6108 | IgorA | 294 | fild dword[z1] |
6113 | IgorA | 295 | fst dword[f_z] ;fz = (float)z1 |
6108 | IgorA | 296 | fdivp |
297 | fstp dword[zinv] ;zinv = 1.0 / fz |
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298 | imul edi,PSZB |
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299 | add edi,[pp1] ;pp = (pp1 + x1 * PSZB) |
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6126 | IgorA | 300 | mov esi,[x1] |
301 | shl esi,1 |
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302 | add esi,[pz1] ;pz = pz1 + x1 |
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6108 | IgorA | 303 | mov eax,[z1] |
304 | mov [z],eax ;z = z1 |
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305 | mov eax,[sz1] |
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306 | mov [s_z],eax ;sz = sz1 |
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307 | mov eax,[tz1] |
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308 | mov [t_z],eax ;tz = tz1 |
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309 | align 4 |
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6111 | IgorA | 310 | .cycle_2: ;while (n>=(NB_INTERP-1)) |
311 | cmp dword[n],NB_INTERP-1 |
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6108 | IgorA | 312 | jl .cycle_2_end |
313 | fld dword[zinv] |
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314 | fld st0 |
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315 | fmul dword[s_z] ;ss = (sz * zinv) |
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316 | fist dword[s] ;s = (int) ss |
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317 | fmul dword[fdzdx] |
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318 | fchs |
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319 | fadd dword[dszdx] |
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320 | fmul dword[zinv] |
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321 | fistp dword[dsdx] ;dsdx = (int)( (dszdx - ss*fdzdx)*zinv ) |
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322 | fmul dword[t_z] ;tt = (tz * zinv) |
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323 | fist dword[t] ;t = (int) tt |
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324 | fmul dword[fdzdx] |
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325 | fchs |
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326 | fadd dword[dtzdx] |
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327 | fmul dword[zinv] |
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328 | fistp dword[dtdx] ;dtdx = (int)( (dtzdx - tt*fdzdx)*zinv ) |
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6134 | IgorA | 329 | fld1 |
6113 | IgorA | 330 | fld dword[f_z] |
6108 | IgorA | 331 | fadd dword[fndzdx] |
6113 | IgorA | 332 | fst dword[f_z] ;fz += fndzdx |
6108 | IgorA | 333 | fdivp |
334 | fstp dword[zinv] ;zinv = 1.0 / fz |
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335 | PUT_PIXEL 0 |
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336 | PUT_PIXEL 1 |
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337 | PUT_PIXEL 2 |
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338 | PUT_PIXEL 3 |
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339 | PUT_PIXEL 4 |
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340 | PUT_PIXEL 5 |
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341 | PUT_PIXEL 6 |
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342 | PUT_PIXEL 7 |
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6126 | IgorA | 343 | add esi,2*NB_INTERP ;pz += NB_INTERP |
6108 | IgorA | 344 | add edi,NB_INTERP*PSZB ;pp += NB_INTERP * PSZB |
6111 | IgorA | 345 | sub dword[n],NB_INTERP ;n -= NB_INTERP |
6108 | IgorA | 346 | fld dword[ndszdx] |
347 | fadd dword[s_z] |
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6111 | IgorA | 348 | fstp dword[s_z] ;sz += ndszdx |
6108 | IgorA | 349 | fld dword[ndtzdx] |
350 | fadd dword[t_z] |
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351 | fstp dword[t_z] ;tz += ndtzdx |
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352 | jmp .cycle_2 |
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6134 | IgorA | 353 | align 4 |
6108 | IgorA | 354 | .cycle_2_end: |
355 | fld dword[zinv] |
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356 | fld st0 |
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357 | fmul dword[s_z] ;ss = (sz * zinv) |
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358 | fist dword[s] ;s = (int) ss |
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359 | fmul dword[fdzdx] |
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360 | fchs |
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361 | fadd dword[dszdx] |
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362 | fmul dword[zinv] |
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363 | fistp dword[dsdx] ;dsdx = (int)( (dszdx - ss*fdzdx)*zinv ) |
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364 | fmul dword[t_z] ;tt = (tz * zinv) |
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365 | fist dword[t] ;t = (int) tt |
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366 | fmul dword[fdzdx] |
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367 | fchs |
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368 | fadd dword[dtzdx] |
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369 | fmul dword[zinv] |
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370 | fistp dword[dtdx] ;dtdx = (int)( (dtzdx - tt*fdzdx)*zinv ) |
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371 | align 4 |
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6111 | IgorA | 372 | .cycle_3: ;while (n>=0) |
373 | cmp dword[n],0 |
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6108 | IgorA | 374 | jl .cycle_3_end |
375 | PUT_PIXEL 0 |
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6126 | IgorA | 376 | add esi,2 ;pz += 1 |
6108 | IgorA | 377 | add edi,PSZB ;pp += PSZB |
6111 | IgorA | 378 | dec dword[n] |
6108 | IgorA | 379 | jmp .cycle_3 |
6134 | IgorA | 380 | align 4 |
6108 | IgorA | 381 | .cycle_3_end: |
5175 | IgorA | 382 | end if |
383 | } |
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384 | |||
6134 | IgorA | 385 | align 16 |
5153 | IgorA | 386 | proc ZB_fillTriangleMappingPerspective, zb:dword, p0:dword, p1:dword, p2:dword |
387 | locals |
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5175 | IgorA | 388 | texture dd ? ;PIXEL * |
389 | fdzdx dd ? ;float |
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5187 | IgorA | 390 | fndzdx dd ? ;float |
391 | ndszdx dd ? ;float |
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392 | ndtzdx dd ? ;float |
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6113 | IgorA | 393 | zinv dd ? ;float |
394 | f_z dd ? ;float - переменная отвечающая за геометрию текстуры |
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6243 | IgorA | 395 | s_log2 dd ? ;unsigned int |
396 | s_bound dd ? ;unsigned int |
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397 | t_bound dd ? ;unsigned int |
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5153 | IgorA | 398 | include 'ztriangle.inc' |