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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 |
5153 | IgorA | 136 | proc ZB_setTexture uses eax ebx, zb:dword, texture:dword |
137 | mov eax,[zb] |
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138 | mov ebx,[texture] |
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139 | mov dword[eax+offs_zbuf_current_texture],ebx |
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140 | ret |
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141 | endp |
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142 | |||
143 | INTERP_Z equ 1 |
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144 | INTERP_ST equ 1 |
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145 | |||
146 | macro DRAW_INIT |
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147 | { |
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5187 | IgorA | 148 | mov eax,[zb] |
149 | mov eax,[eax+offs_zbuf_current_texture] |
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150 | mov [texture],eax |
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5153 | IgorA | 151 | } |
152 | |||
153 | macro PUT_PIXEL _a |
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154 | { |
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5187 | IgorA | 155 | local .end_0 |
156 | mov eax,[z] |
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157 | shr eax,ZB_POINT_Z_FRAC_BITS |
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6126 | IgorA | 158 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
5187 | IgorA | 159 | jl .end_0 |
5922 | IgorA | 160 | ;edi = pp |
6126 | IgorA | 161 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 162 | if TGL_FEATURE_RENDER_BITS eq 24 |
6108 | IgorA | 163 | mov ebx,[t] |
164 | and ebx,0x3fc00000 |
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6141 | IgorA | 165 | mov eax,[s] |
166 | and eax,0x003fc000 |
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167 | or ebx,eax |
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6108 | IgorA | 168 | shr ebx,14 |
169 | imul ebx,3 |
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170 | add ebx,[texture] ;ptr = texture + (((t & 0x3fc00000) | s) >> 14) * 3 |
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171 | mov ax,word[ebx] |
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172 | mov word[edi+3*_a],ax ;pp[3 * _a]= ptr[0,1] |
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173 | mov al,byte[ebx+2] |
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174 | mov byte[edi+3*_a +2],al ;pp[3 * _a + 2]= ptr[2] |
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5153 | IgorA | 175 | else |
6126 | IgorA | 176 | ;pp[_a]=texture[((t & 0x3FC00000) | s) >> 14] |
5153 | IgorA | 177 | end if |
5187 | IgorA | 178 | .end_0: |
5175 | IgorA | 179 | mov eax,[dzdx] |
180 | add [z],eax |
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181 | mov eax,[dsdx] |
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182 | add [s],eax |
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183 | mov eax,[dtdx] |
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184 | add [t],eax |
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5153 | IgorA | 185 | } |
186 | |||
6134 | IgorA | 187 | align 16 |
5153 | IgorA | 188 | proc ZB_fillTriangleMapping, zb:dword, p0:dword, p1:dword, p2:dword |
189 | locals |
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190 | texture dd ? ;PIXEL* |
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191 | include 'ztriangle.inc' |
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192 | |||
193 | ; |
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194 | ; Texture mapping with perspective correction. |
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195 | ; We use the gradient method to make less divisions. |
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196 | ; TODO: pipeline the division |
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197 | ; |
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198 | if 1 |
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199 | |||
200 | INTERP_Z equ 1 |
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201 | INTERP_STZ equ 1 |
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202 | |||
203 | NB_INTERP equ 8 |
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204 | |||
205 | macro DRAW_INIT |
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206 | { |
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5187 | IgorA | 207 | mov eax,[zb] |
208 | mov eax,[eax+offs_zbuf_current_texture] |
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209 | mov [texture],eax |
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6108 | IgorA | 210 | mov dword[esp-4],NB_INTERP |
211 | fild dword[esp-4] |
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5187 | IgorA | 212 | fild dword[dzdx] |
6108 | IgorA | 213 | fst dword[fdzdx] ;fdzdx = (float)dzdx |
214 | fmul st0,st1 |
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215 | fstp dword[fndzdx] ;fndzdx = NB_INTERP * fdzdx |
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216 | fld dword[fdzdx] |
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217 | fmul st0,st1 |
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218 | fstp dword[ndszdx] ;ndszdx = NB_INTERP * dszdx |
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219 | fmul dword[dtzdx] |
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220 | fstp dword[ndtzdx] ;ndtzdx = NB_INTERP * dtzdx |
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5153 | IgorA | 221 | } |
222 | |||
223 | macro PUT_PIXEL _a |
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224 | { |
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5187 | IgorA | 225 | local .end_0 |
226 | mov eax,[z] |
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227 | shr eax,ZB_POINT_Z_FRAC_BITS |
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6126 | IgorA | 228 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
5187 | IgorA | 229 | jl .end_0 |
5922 | IgorA | 230 | ;edi = pp |
6126 | IgorA | 231 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5153 | IgorA | 232 | if TGL_FEATURE_RENDER_BITS eq 24 |
6108 | IgorA | 233 | mov ebx,[t] |
234 | and ebx,0x3fc00000 |
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235 | mov eax,[s] |
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236 | and eax,0x003fc000 |
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237 | or ebx,eax |
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238 | shr ebx,14 |
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239 | imul ebx,3 |
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240 | add ebx,[texture] ;ptr = texture + (((t & 0x3fc00000) | (s & 0x003FC000)) >> 14) * 3 |
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241 | mov ax,word[ebx] |
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242 | mov word[edi+3*_a],ax ;pp[3 * _a]= ptr[0,1] |
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243 | mov al,byte[ebx+2] |
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244 | mov byte[edi+3*_a +2],al ;pp[3 * _a + 2]= ptr[2] |
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5153 | IgorA | 245 | else |
246 | ; pp[_a]=*(PIXEL *)((char *)texture+ |
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5187 | IgorA | 247 | ; (((t & 0x3FC00000) | (s & 0x003FC000)) >> (17 - PSZSH))); |
5153 | IgorA | 248 | end if |
5187 | IgorA | 249 | .end_0: |
5175 | IgorA | 250 | mov eax,[dzdx] |
251 | add [z],eax |
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252 | mov eax,[dsdx] |
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253 | add [s],eax |
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254 | mov eax,[dtdx] |
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255 | add [t],eax |
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5153 | IgorA | 256 | } |
257 | |||
5175 | IgorA | 258 | DRAW_LINE_M equ 1 |
259 | |||
6113 | IgorA | 260 | macro DRAW_LINE |
5175 | IgorA | 261 | { |
262 | if TGL_FEATURE_RENDER_BITS eq 24 |
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6108 | IgorA | 263 | mov eax,[x2] |
264 | sar eax,16 |
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6113 | IgorA | 265 | mov edi,[x1] |
266 | sub eax,edi |
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6111 | IgorA | 267 | mov [n],eax ;n = (x2 >> 16) - x1 |
6134 | IgorA | 268 | fld1 |
6108 | IgorA | 269 | fild dword[z1] |
6113 | IgorA | 270 | fst dword[f_z] ;fz = (float)z1 |
6108 | IgorA | 271 | fdivp |
272 | fstp dword[zinv] ;zinv = 1.0 / fz |
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273 | imul edi,PSZB |
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274 | add edi,[pp1] ;pp = (pp1 + x1 * PSZB) |
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6126 | IgorA | 275 | mov esi,[x1] |
276 | shl esi,1 |
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277 | add esi,[pz1] ;pz = pz1 + x1 |
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6108 | IgorA | 278 | mov eax,[z1] |
279 | mov [z],eax ;z = z1 |
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280 | mov eax,[sz1] |
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281 | mov [s_z],eax ;sz = sz1 |
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282 | mov eax,[tz1] |
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283 | mov [t_z],eax ;tz = tz1 |
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284 | align 4 |
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6111 | IgorA | 285 | .cycle_2: ;while (n>=(NB_INTERP-1)) |
286 | cmp dword[n],NB_INTERP-1 |
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6108 | IgorA | 287 | jl .cycle_2_end |
288 | fld dword[zinv] |
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289 | fld st0 |
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290 | fmul dword[s_z] ;ss = (sz * zinv) |
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291 | fist dword[s] ;s = (int) ss |
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292 | fmul dword[fdzdx] |
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293 | fchs |
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294 | fadd dword[dszdx] |
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295 | fmul dword[zinv] |
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296 | fistp dword[dsdx] ;dsdx = (int)( (dszdx - ss*fdzdx)*zinv ) |
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297 | fmul dword[t_z] ;tt = (tz * zinv) |
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298 | fist dword[t] ;t = (int) tt |
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299 | fmul dword[fdzdx] |
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300 | fchs |
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301 | fadd dword[dtzdx] |
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302 | fmul dword[zinv] |
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303 | fistp dword[dtdx] ;dtdx = (int)( (dtzdx - tt*fdzdx)*zinv ) |
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6134 | IgorA | 304 | fld1 |
6113 | IgorA | 305 | fld dword[f_z] |
6108 | IgorA | 306 | fadd dword[fndzdx] |
6113 | IgorA | 307 | fst dword[f_z] ;fz += fndzdx |
6108 | IgorA | 308 | fdivp |
309 | fstp dword[zinv] ;zinv = 1.0 / fz |
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310 | PUT_PIXEL 0 |
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311 | PUT_PIXEL 1 |
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312 | PUT_PIXEL 2 |
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313 | PUT_PIXEL 3 |
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314 | PUT_PIXEL 4 |
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315 | PUT_PIXEL 5 |
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316 | PUT_PIXEL 6 |
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317 | PUT_PIXEL 7 |
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6126 | IgorA | 318 | add esi,2*NB_INTERP ;pz += NB_INTERP |
6108 | IgorA | 319 | add edi,NB_INTERP*PSZB ;pp += NB_INTERP * PSZB |
6111 | IgorA | 320 | sub dword[n],NB_INTERP ;n -= NB_INTERP |
6108 | IgorA | 321 | fld dword[ndszdx] |
322 | fadd dword[s_z] |
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6111 | IgorA | 323 | fstp dword[s_z] ;sz += ndszdx |
6108 | IgorA | 324 | fld dword[ndtzdx] |
325 | fadd dword[t_z] |
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326 | fstp dword[t_z] ;tz += ndtzdx |
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327 | jmp .cycle_2 |
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6134 | IgorA | 328 | align 4 |
6108 | IgorA | 329 | .cycle_2_end: |
330 | fld dword[zinv] |
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331 | fld st0 |
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332 | fmul dword[s_z] ;ss = (sz * zinv) |
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333 | fist dword[s] ;s = (int) ss |
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334 | fmul dword[fdzdx] |
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335 | fchs |
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336 | fadd dword[dszdx] |
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337 | fmul dword[zinv] |
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338 | fistp dword[dsdx] ;dsdx = (int)( (dszdx - ss*fdzdx)*zinv ) |
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339 | fmul dword[t_z] ;tt = (tz * zinv) |
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340 | fist dword[t] ;t = (int) tt |
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341 | fmul dword[fdzdx] |
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342 | fchs |
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343 | fadd dword[dtzdx] |
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344 | fmul dword[zinv] |
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345 | fistp dword[dtdx] ;dtdx = (int)( (dtzdx - tt*fdzdx)*zinv ) |
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346 | align 4 |
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6111 | IgorA | 347 | .cycle_3: ;while (n>=0) |
348 | cmp dword[n],0 |
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6108 | IgorA | 349 | jl .cycle_3_end |
350 | PUT_PIXEL 0 |
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6126 | IgorA | 351 | add esi,2 ;pz += 1 |
6108 | IgorA | 352 | add edi,PSZB ;pp += PSZB |
6111 | IgorA | 353 | dec dword[n] |
6108 | IgorA | 354 | jmp .cycle_3 |
6134 | IgorA | 355 | align 4 |
6108 | IgorA | 356 | .cycle_3_end: |
5175 | IgorA | 357 | end if |
358 | } |
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359 | |||
6134 | IgorA | 360 | align 16 |
5153 | IgorA | 361 | proc ZB_fillTriangleMappingPerspective, zb:dword, p0:dword, p1:dword, p2:dword |
362 | locals |
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5175 | IgorA | 363 | texture dd ? ;PIXEL * |
364 | fdzdx dd ? ;float |
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5187 | IgorA | 365 | fndzdx dd ? ;float |
366 | ndszdx dd ? ;float |
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367 | ndtzdx dd ? ;float |
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6113 | IgorA | 368 | zinv dd ? ;float |
369 | f_z dd ? ;float - переменная отвечающая за геометрию текстуры |
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5153 | IgorA | 370 | include 'ztriangle.inc' |
371 | |||
372 | end if |
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373 | |||
374 | if 0 |
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375 | |||
376 | ; slow but exact version (only there for reference, incorrect for 24 |
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377 | ; bits) |
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378 | |||
379 | INTERP_Z equ 1 |
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380 | INTERP_STZ equ 1 |
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381 | |||
382 | macro DRAW_INIT |
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383 | { |
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5187 | IgorA | 384 | mov eax,[zb] |
385 | mov eax,[eax+offs_zbuf_current_texture] |
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386 | mov [texture],eax |
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5153 | IgorA | 387 | } |
388 | |||
389 | macro PUT_PIXEL _a |
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390 | { |
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5187 | IgorA | 391 | local .end_0 |
392 | mov eax,[z] |
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393 | shr eax,ZB_POINT_Z_FRAC_BITS |
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6126 | IgorA | 394 | cmp ax,word[esi+2*_a] ;if (zz >= pz[_a]) |
5187 | IgorA | 395 | jl .end_0 |
5922 | IgorA | 396 | ;edi = pp |
6126 | IgorA | 397 | mov word[esi+2*_a],ax ;пишем в буфер глубины новое значение |
5187 | IgorA | 398 | fild dword[z] |
399 | fld dword[s_z] |
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400 | fdiv st0,st1 |
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6111 | IgorA | 401 | fistp dword[esp-4] ;s = (int) (s_z / (float) z) |
402 | fld dword[t_z] |
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403 | fdiv st0,st1 |
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404 | fistp dword[esp-8] ;t = (int) (t_z / (float) z) |
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405 | mov eax,dword[esp-8] |
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406 | and eax,0x3FC00000 |
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407 | or eax,dword[esp-4] |
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408 | shr eax,12 ;14 |
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409 | add eax,[texture] |
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410 | mov eax,[eax] |
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411 | stosd ;pp[_a] = texture[((t & 0x3FC00000) | s) >> 14] |
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412 | sub edi,4 |
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5187 | IgorA | 413 | .end_0: |
5175 | IgorA | 414 | mov eax,[dzdx] |
415 | add [z],eax |
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5187 | IgorA | 416 | fld dword[dszdx] |
417 | fadd dword[s_z] |
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418 | fstp dword[s_z] |
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419 | fld dword,[dtzdx] |
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420 | fadd dword[t_z] |
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421 | fstp dword[t_z] |
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5153 | IgorA | 422 | } |
423 | |||
6134 | IgorA | 424 | align 16 |
5153 | IgorA | 425 | proc ZB_fillTriangleMappingPerspective, zb:dword, p0:dword, p1:dword, p2:dword |
426 | locals |
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427 | texture dd ? ;PIXEL* |
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428 | include 'ztriangle.inc' |
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429 | |||
430 | end if |