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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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8069 | IgorA | 41 | mov eax,[ecx+ZBufferPoint.r] |
42 | mov [colorB],ah ;colorB=p2.r>>8 |
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43 | mov eax,[ecx+ZBufferPoint.g] |
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5208 | IgorA | 44 | mov [colorG],ah ;colorG=p2.g>>8 |
8069 | IgorA | 45 | mov eax,[ecx+ZBufferPoint.b] |
46 | mov [colorR],ah ;colorR=p2.b>>8 |
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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 |
8069 | IgorA | 55 | if _a eq 0 |
56 | mov ebx,[dzdx] |
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57 | end if |
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5175 | IgorA | 58 | mov eax,[z] |
6126 | IgorA | 59 | shr eax,ZB_POINT_Z_FRAC_BITS |
60 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
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5175 | IgorA | 61 | jl .end_0 |
62 | ;edi = pp |
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6126 | IgorA | 63 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 64 | if TGL_FEATURE_RENDER_BITS eq 24 |
8069 | IgorA | 65 | mov ax,word[colorB] ;сохраняем colorB и colorG |
66 | mov word[edi+3*_a],ax |
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6111 | IgorA | 67 | mov al,[colorR] |
68 | mov byte[edi+3*_a +2],al |
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5187 | IgorA | 69 | ;else |
6126 | IgorA | 70 | ;pp[_a]=color |
5153 | IgorA | 71 | end if |
5175 | IgorA | 72 | .end_0: |
8069 | IgorA | 73 | add [z],ebx |
5153 | IgorA | 74 | } |
75 | |||
6134 | IgorA | 76 | align 16 |
5153 | IgorA | 77 | proc ZB_fillTriangleFlat, zb:dword, p0:dword, p1:dword, p2:dword |
78 | locals |
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79 | if TGL_FEATURE_RENDER_BITS eq 24 |
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8069 | IgorA | 80 | colorB db ? |
5153 | IgorA | 81 | colorG db ? |
8069 | IgorA | 82 | colorR db ? ;unsigned char |
5153 | IgorA | 83 | else |
84 | color dd ? ;int |
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85 | end if |
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86 | include 'ztriangle.inc' |
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87 | |||
88 | ; |
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89 | ; Smooth filled triangle. |
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90 | ; The code below is very tricky :) |
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91 | ; |
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92 | |||
93 | INTERP_Z equ 1 |
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94 | INTERP_RGB equ 1 |
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95 | |||
96 | macro DRAW_INIT |
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97 | { |
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98 | } |
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99 | |||
100 | macro PUT_PIXEL _a |
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101 | { |
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5187 | IgorA | 102 | local .end_0 |
5175 | IgorA | 103 | mov eax,[z] |
104 | shr eax,ZB_POINT_Z_FRAC_BITS |
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6126 | IgorA | 105 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
5187 | IgorA | 106 | jl .end_0 |
107 | ;edi = pp |
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6126 | IgorA | 108 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 109 | if TGL_FEATURE_RENDER_BITS eq 24 |
6111 | IgorA | 110 | mov eax,[og1] |
8069 | IgorA | 111 | mov al,byte[or1+1] |
6111 | IgorA | 112 | mov word[edi+3*_a],ax |
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: |
8069 | IgorA | 120 | if _a eq 0 |
121 | mov ebx,[dzdx] |
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122 | mov ecx,[dgdx] |
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123 | mov edx,[drdx] |
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124 | end if |
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125 | add [z],ebx |
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126 | add [og1],ecx |
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127 | add [or1],edx |
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5187 | IgorA | 128 | mov eax,[dbdx] |
129 | add [ob1],eax |
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5153 | IgorA | 130 | } |
131 | |||
6134 | IgorA | 132 | align 16 |
5153 | IgorA | 133 | proc ZB_fillTriangleSmooth, zb:dword, p0:dword, p1:dword, p2:dword |
134 | locals |
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135 | include 'ztriangle.inc' |
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136 | |||
6134 | IgorA | 137 | align 16 |
6243 | IgorA | 138 | proc ZB_setTexture uses eax ebx, zb:dword, texture:dword,\ |
139 | s_bound:dword, t_bound:dword, s_log2:dword |
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5153 | IgorA | 140 | mov eax,[zb] |
141 | mov ebx,[texture] |
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8069 | IgorA | 142 | mov dword[eax+ZBuffer.current_texture],ebx |
6243 | IgorA | 143 | mov ebx,[s_log2] |
8069 | IgorA | 144 | mov dword[eax+ZBuffer.s_log2],ebx |
6243 | IgorA | 145 | mov ebx,[s_bound] |
8069 | IgorA | 146 | mov dword[eax+ZBuffer.s_bound],ebx |
6243 | IgorA | 147 | mov ebx,[t_bound] |
8069 | IgorA | 148 | mov dword[eax+ZBuffer.t_bound],ebx |
5153 | IgorA | 149 | ret |
150 | endp |
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151 | |||
152 | INTERP_Z equ 1 |
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153 | INTERP_ST equ 1 |
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154 | |||
155 | macro DRAW_INIT |
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156 | { |
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5187 | IgorA | 157 | mov eax,[zb] |
8069 | IgorA | 158 | mov ebx,[eax+ZBuffer.current_texture] |
6243 | IgorA | 159 | mov [texture],ebx |
8069 | IgorA | 160 | mov ebx,[eax+ZBuffer.s_log2] |
6243 | IgorA | 161 | mov [s_log2],ebx ;s_log2 = zb.s_log2 |
8069 | IgorA | 162 | mov ebx,[eax+ZBuffer.s_bound] |
6243 | IgorA | 163 | mov [s_bound],ebx ;s_bound = zb.s_bound |
8069 | IgorA | 164 | mov ebx,[eax+ZBuffer.t_bound] |
6243 | IgorA | 165 | mov [t_bound],ebx ;t_bound = zb.t_bound |
5153 | IgorA | 166 | } |
167 | |||
168 | macro PUT_PIXEL _a |
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169 | { |
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5187 | IgorA | 170 | local .end_0 |
171 | mov eax,[z] |
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172 | shr eax,ZB_POINT_Z_FRAC_BITS |
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6126 | IgorA | 173 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
5187 | IgorA | 174 | jl .end_0 |
5922 | IgorA | 175 | ;edi = pp |
6126 | IgorA | 176 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 177 | if TGL_FEATURE_RENDER_BITS eq 24 |
6108 | IgorA | 178 | mov ebx,[t] |
6243 | IgorA | 179 | and ebx,[t_bound] |
180 | mov ecx,[s_log2] |
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181 | shr ebx,cl ;(t & t_bound) >> s_log2 |
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6141 | IgorA | 182 | mov eax,[s] |
6243 | IgorA | 183 | and eax,[s_bound] |
184 | shr eax,ZB_POINT_TEXEL_SIZE |
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6141 | IgorA | 185 | or ebx,eax |
8069 | IgorA | 186 | lea ebx,[ebx+2*ebx] |
6108 | IgorA | 187 | add ebx,[texture] ;ptr = texture + (((t & 0x3fc00000) | s) >> 14) * 3 |
188 | mov ax,word[ebx] |
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189 | mov word[edi+3*_a],ax ;pp[3 * _a]= ptr[0,1] |
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190 | mov al,byte[ebx+2] |
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191 | mov byte[edi+3*_a +2],al ;pp[3 * _a + 2]= ptr[2] |
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5153 | IgorA | 192 | else |
6126 | IgorA | 193 | ;pp[_a]=texture[((t & 0x3FC00000) | s) >> 14] |
5153 | IgorA | 194 | end if |
5187 | IgorA | 195 | .end_0: |
5175 | IgorA | 196 | mov eax,[dzdx] |
197 | add [z],eax |
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198 | mov eax,[dsdx] |
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199 | add [s],eax |
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200 | mov eax,[dtdx] |
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201 | add [t],eax |
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5153 | IgorA | 202 | } |
203 | |||
6134 | IgorA | 204 | align 16 |
5153 | IgorA | 205 | proc ZB_fillTriangleMapping, zb:dword, p0:dword, p1:dword, p2:dword |
206 | locals |
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207 | texture dd ? ;PIXEL* |
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6243 | IgorA | 208 | s_log2 dd ? ;unsigned int |
209 | s_bound dd ? ;unsigned int |
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210 | t_bound dd ? ;unsigned int |
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5153 | IgorA | 211 | include 'ztriangle.inc' |
212 | |||
213 | ; |
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214 | ; Texture mapping with perspective correction. |
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215 | ; We use the gradient method to make less divisions. |
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216 | ; TODO: pipeline the division |
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217 | ; |
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218 | |||
219 | INTERP_Z equ 1 |
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220 | INTERP_STZ equ 1 |
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221 | |||
222 | NB_INTERP equ 8 |
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223 | |||
224 | macro DRAW_INIT |
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225 | { |
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5187 | IgorA | 226 | mov eax,[zb] |
8069 | IgorA | 227 | mov ebx,[eax+ZBuffer.current_texture] |
6243 | IgorA | 228 | mov [texture],ebx |
8069 | IgorA | 229 | mov ebx,[eax+ZBuffer.s_log2] |
6243 | IgorA | 230 | mov [s_log2],ebx ;s_log2 = zb.s_log2 |
8069 | IgorA | 231 | mov ebx,[eax+ZBuffer.s_bound] |
6243 | IgorA | 232 | mov [s_bound],ebx ;s_bound = zb.s_bound |
8069 | IgorA | 233 | mov ebx,[eax+ZBuffer.t_bound] |
6243 | IgorA | 234 | mov [t_bound],ebx ;t_bound = zb.t_bound |
6108 | IgorA | 235 | mov dword[esp-4],NB_INTERP |
236 | fild dword[esp-4] |
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5187 | IgorA | 237 | fild dword[dzdx] |
6108 | IgorA | 238 | fst dword[fdzdx] ;fdzdx = (float)dzdx |
239 | fmul st0,st1 |
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240 | fstp dword[fndzdx] ;fndzdx = NB_INTERP * fdzdx |
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241 | fld dword[fdzdx] |
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242 | fmul st0,st1 |
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243 | fstp dword[ndszdx] ;ndszdx = NB_INTERP * dszdx |
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244 | fmul dword[dtzdx] |
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245 | fstp dword[ndtzdx] ;ndtzdx = NB_INTERP * dtzdx |
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5153 | IgorA | 246 | } |
247 | |||
248 | macro PUT_PIXEL _a |
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249 | { |
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5187 | IgorA | 250 | local .end_0 |
251 | mov eax,[z] |
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252 | shr eax,ZB_POINT_Z_FRAC_BITS |
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6126 | IgorA | 253 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
5187 | IgorA | 254 | jl .end_0 |
5922 | IgorA | 255 | ;edi = pp |
6126 | IgorA | 256 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 257 | if TGL_FEATURE_RENDER_BITS eq 24 |
6108 | IgorA | 258 | mov ebx,[t] |
6243 | IgorA | 259 | and ebx,[t_bound] |
260 | mov ecx,[s_log2] |
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261 | shr ebx,cl ;(t & t_bound) >> s_log2 |
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6108 | IgorA | 262 | mov eax,[s] |
6243 | IgorA | 263 | and eax,[s_bound] |
264 | shr eax,ZB_POINT_TEXEL_SIZE |
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6108 | IgorA | 265 | or ebx,eax |
8069 | IgorA | 266 | lea ebx,[ebx+2*ebx] |
6108 | IgorA | 267 | add ebx,[texture] ;ptr = texture + (((t & 0x3fc00000) | (s & 0x003FC000)) >> 14) * 3 |
268 | mov ax,word[ebx] |
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269 | mov word[edi+3*_a],ax ;pp[3 * _a]= ptr[0,1] |
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270 | mov al,byte[ebx+2] |
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271 | mov byte[edi+3*_a +2],al ;pp[3 * _a + 2]= ptr[2] |
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5153 | IgorA | 272 | else |
273 | ; pp[_a]=*(PIXEL *)((char *)texture+ |
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5187 | IgorA | 274 | ; (((t & 0x3FC00000) | (s & 0x003FC000)) >> (17 - PSZSH))); |
5153 | IgorA | 275 | end if |
5187 | IgorA | 276 | .end_0: |
5175 | IgorA | 277 | mov eax,[dzdx] |
278 | add [z],eax |
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279 | mov eax,[dsdx] |
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280 | add [s],eax |
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281 | mov eax,[dtdx] |
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282 | add [t],eax |
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5153 | IgorA | 283 | } |
284 | |||
5175 | IgorA | 285 | DRAW_LINE_M equ 1 |
286 | |||
6113 | IgorA | 287 | macro DRAW_LINE |
5175 | IgorA | 288 | { |
289 | if TGL_FEATURE_RENDER_BITS eq 24 |
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6108 | IgorA | 290 | mov eax,[x2] |
291 | sar eax,16 |
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6113 | IgorA | 292 | mov edi,[x1] |
293 | sub eax,edi |
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6111 | IgorA | 294 | mov [n],eax ;n = (x2 >> 16) - x1 |
6134 | IgorA | 295 | fld1 |
6108 | IgorA | 296 | fild dword[z1] |
6113 | IgorA | 297 | fst dword[f_z] ;fz = (float)z1 |
6108 | IgorA | 298 | fdivp |
299 | fstp dword[zinv] ;zinv = 1.0 / fz |
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300 | imul edi,PSZB |
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301 | add edi,[pp1] ;pp = (pp1 + x1 * PSZB) |
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6126 | IgorA | 302 | mov esi,[x1] |
303 | shl esi,1 |
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304 | add esi,[pz1] ;pz = pz1 + x1 |
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6108 | IgorA | 305 | mov eax,[z1] |
306 | mov [z],eax ;z = z1 |
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307 | mov eax,[sz1] |
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308 | mov [s_z],eax ;sz = sz1 |
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309 | mov eax,[tz1] |
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310 | mov [t_z],eax ;tz = tz1 |
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311 | align 4 |
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6111 | IgorA | 312 | .cycle_2: ;while (n>=(NB_INTERP-1)) |
313 | cmp dword[n],NB_INTERP-1 |
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6108 | IgorA | 314 | jl .cycle_2_end |
315 | fld dword[zinv] |
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316 | fld st0 |
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317 | fmul dword[s_z] ;ss = (sz * zinv) |
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318 | fist dword[s] ;s = (int) ss |
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319 | fmul dword[fdzdx] |
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320 | fchs |
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321 | fadd dword[dszdx] |
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322 | fmul dword[zinv] |
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323 | fistp dword[dsdx] ;dsdx = (int)( (dszdx - ss*fdzdx)*zinv ) |
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324 | fmul dword[t_z] ;tt = (tz * zinv) |
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325 | fist dword[t] ;t = (int) tt |
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326 | fmul dword[fdzdx] |
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327 | fchs |
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328 | fadd dword[dtzdx] |
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329 | fmul dword[zinv] |
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330 | fistp dword[dtdx] ;dtdx = (int)( (dtzdx - tt*fdzdx)*zinv ) |
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6134 | IgorA | 331 | fld1 |
6113 | IgorA | 332 | fld dword[f_z] |
6108 | IgorA | 333 | fadd dword[fndzdx] |
6113 | IgorA | 334 | fst dword[f_z] ;fz += fndzdx |
6108 | IgorA | 335 | fdivp |
336 | fstp dword[zinv] ;zinv = 1.0 / fz |
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337 | PUT_PIXEL 0 |
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338 | PUT_PIXEL 1 |
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339 | PUT_PIXEL 2 |
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340 | PUT_PIXEL 3 |
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341 | PUT_PIXEL 4 |
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342 | PUT_PIXEL 5 |
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343 | PUT_PIXEL 6 |
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344 | PUT_PIXEL 7 |
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6126 | IgorA | 345 | add esi,2*NB_INTERP ;pz += NB_INTERP |
6108 | IgorA | 346 | add edi,NB_INTERP*PSZB ;pp += NB_INTERP * PSZB |
6111 | IgorA | 347 | sub dword[n],NB_INTERP ;n -= NB_INTERP |
6108 | IgorA | 348 | fld dword[ndszdx] |
349 | fadd dword[s_z] |
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6111 | IgorA | 350 | fstp dword[s_z] ;sz += ndszdx |
6108 | IgorA | 351 | fld dword[ndtzdx] |
352 | fadd dword[t_z] |
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353 | fstp dword[t_z] ;tz += ndtzdx |
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354 | jmp .cycle_2 |
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6134 | IgorA | 355 | align 4 |
6108 | IgorA | 356 | .cycle_2_end: |
357 | fld dword[zinv] |
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358 | fld st0 |
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359 | fmul dword[s_z] ;ss = (sz * zinv) |
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360 | fist dword[s] ;s = (int) ss |
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361 | fmul dword[fdzdx] |
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362 | fchs |
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363 | fadd dword[dszdx] |
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364 | fmul dword[zinv] |
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365 | fistp dword[dsdx] ;dsdx = (int)( (dszdx - ss*fdzdx)*zinv ) |
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366 | fmul dword[t_z] ;tt = (tz * zinv) |
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367 | fist dword[t] ;t = (int) tt |
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368 | fmul dword[fdzdx] |
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369 | fchs |
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370 | fadd dword[dtzdx] |
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371 | fmul dword[zinv] |
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372 | fistp dword[dtdx] ;dtdx = (int)( (dtzdx - tt*fdzdx)*zinv ) |
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373 | align 4 |
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6111 | IgorA | 374 | .cycle_3: ;while (n>=0) |
375 | cmp dword[n],0 |
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6108 | IgorA | 376 | jl .cycle_3_end |
377 | PUT_PIXEL 0 |
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6126 | IgorA | 378 | add esi,2 ;pz += 1 |
6108 | IgorA | 379 | add edi,PSZB ;pp += PSZB |
6111 | IgorA | 380 | dec dword[n] |
6108 | IgorA | 381 | jmp .cycle_3 |
6134 | IgorA | 382 | align 4 |
6108 | IgorA | 383 | .cycle_3_end: |
5175 | IgorA | 384 | end if |
385 | } |
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386 | |||
6134 | IgorA | 387 | align 16 |
5153 | IgorA | 388 | proc ZB_fillTriangleMappingPerspective, zb:dword, p0:dword, p1:dword, p2:dword |
389 | locals |
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5175 | IgorA | 390 | texture dd ? ;PIXEL * |
391 | fdzdx dd ? ;float |
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5187 | IgorA | 392 | fndzdx dd ? ;float |
393 | ndszdx dd ? ;float |
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394 | ndtzdx dd ? ;float |
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6113 | IgorA | 395 | zinv dd ? ;float |
396 | f_z dd ? ;float - переменная отвечающая за геометрию текстуры |
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6243 | IgorA | 397 | s_log2 dd ? ;unsigned int |
398 | s_bound dd ? ;unsigned int |
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399 | t_bound dd ? ;unsigned int |
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5153 | IgorA | 400 | include 'ztriangle.inc' |