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Rev | Author | Line No. | Line |
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5153 | IgorA | 1 | ; fill triangle profile |
2 | ; #define PROFILE |
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3 | |||
4 | CLIP_XMIN equ (1<<0) |
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5 | CLIP_XMAX equ (1<<1) |
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6 | CLIP_YMIN equ (1<<2) |
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7 | CLIP_YMAX equ (1<<3) |
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8 | CLIP_ZMIN equ (1<<4) |
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9 | CLIP_ZMAX equ (1<<5) |
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10 | |||
6134 | IgorA | 11 | align 16 |
5153 | IgorA | 12 | proc gl_transform_to_viewport uses eax ebx ecx, context:dword,v:dword |
13 | locals |
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14 | point dd ? |
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15 | endl |
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16 | mov eax,[context] |
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17 | mov ebx,[v] |
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18 | |||
19 | ; coordinates |
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20 | fld1 |
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21 | fdiv dword[ebx+offs_vert_pc+offs_W] ;st0 = 1/v.pc.W |
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22 | |||
23 | fld dword[ebx+offs_vert_pc+offs_X] ;st0 = v.pc.X |
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24 | fmul st0,st1 |
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25 | fmul dword[eax+offs_cont_viewport+offs_vpor_scale+offs_X] |
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26 | fadd dword[eax+offs_cont_viewport+offs_vpor_trans+offs_X] |
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27 | fistp dword[ebx+offs_vert_zp] ;v.zp.x = st0, st0 = st1 |
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28 | |||
29 | fld dword[ebx+offs_vert_pc+offs_Y] ;st0 = v.pc.Y |
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30 | fmul st0,st1 |
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31 | fmul dword[eax+offs_cont_viewport+offs_vpor_scale+offs_Y] |
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32 | fadd dword[eax+offs_cont_viewport+offs_vpor_trans+offs_Y] |
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33 | fistp dword[ebx+offs_vert_zp+offs_zbup_y] ;v.zp.y = st0, st0 = st1 |
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34 | |||
35 | fld dword[ebx+offs_vert_pc+offs_Z] ;st0 = v.pc.Z |
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36 | fmul st0,st1 |
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37 | fmul dword[eax+offs_cont_viewport+offs_vpor_scale+offs_Z] |
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38 | fadd dword[eax+offs_cont_viewport+offs_vpor_trans+offs_Z] |
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39 | fistp dword[ebx+offs_vert_zp+offs_zbup_z] ;v.zp.z = st0, st0 = st1 |
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40 | |||
5187 | IgorA | 41 | ffree st0 |
42 | fincstp |
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43 | |||
5153 | IgorA | 44 | ; color |
5208 | IgorA | 45 | cmp dword[eax+offs_cont_lighting_enabled],0 ;if (context.lighting_enabled) |
46 | je @f |
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5153 | IgorA | 47 | mov ecx,ebx |
48 | add ecx,offs_vert_zp+offs_zbup_b |
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49 | push ecx |
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50 | add ecx,offs_zbup_g-offs_zbup_b |
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51 | push ecx |
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52 | add ecx,offs_zbup_r-offs_zbup_g |
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53 | push ecx |
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54 | stdcall RGBFtoRGBI, dword[ebx+offs_vert_color],dword[ebx+offs_vert_color+4],dword[ebx+offs_vert_color+8] |
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55 | jmp .end_if |
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6134 | IgorA | 56 | align 4 |
5153 | IgorA | 57 | @@: |
58 | ; no need to convert to integer if no lighting : take current color |
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59 | mov ecx,[eax+offs_cont_longcurrent_color] |
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60 | mov dword[ebx+offs_vert_zp+offs_zbup_r],ecx |
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61 | mov ecx,[eax+offs_cont_longcurrent_color+4] |
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62 | mov dword[ebx+offs_vert_zp+offs_zbup_g],ecx |
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63 | mov ecx,[eax+offs_cont_longcurrent_color+8] |
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64 | mov dword[ebx+offs_vert_zp+offs_zbup_b],ecx |
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65 | .end_if: |
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66 | |||
67 | ; texture |
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5353 | IgorA | 68 | cmp dword[eax+offs_cont_texture_2d_enabled],0 |
69 | je @f |
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5153 | IgorA | 70 | mov dword[point],dword(ZB_POINT_S_MAX - ZB_POINT_S_MIN) |
71 | fild dword[point] |
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72 | fmul dword[ebx+offs_vert_tex_coord] ;st0 *= v.tex_coord.X |
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73 | fistp dword[ebx+offs_vert_zp+offs_zbup_s] |
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74 | add dword[ebx+offs_vert_zp+offs_zbup_s],ZB_POINT_S_MIN |
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75 | |||
76 | mov dword[point],dword(ZB_POINT_T_MAX - ZB_POINT_T_MIN) |
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77 | fild dword[point] |
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6134 | IgorA | 78 | fmul dword[ebx+offs_vert_tex_coord+offs_Y] ;st0 *= v.tex_coord.Y |
5153 | IgorA | 79 | fistp dword[ebx+offs_vert_zp+offs_zbup_t] |
80 | add dword[ebx+offs_vert_zp+offs_zbup_s],ZB_POINT_T_MIN |
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81 | @@: |
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82 | ret |
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83 | endp |
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84 | |||
6134 | IgorA | 85 | align 16 |
5153 | IgorA | 86 | proc gl_add_select1 uses eax ebx ecx, context:dword, z1:dword,z2:dword,z3:dword |
87 | mov eax,[z1] |
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88 | mov ebx,eax |
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89 | cmp [z2],eax |
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90 | jge @f |
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91 | mov eax,[z2] |
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92 | @@: |
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93 | cmp [z3],eax |
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94 | jge @f |
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95 | mov eax,[z3] |
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96 | @@: |
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97 | cmp [z2],ebx |
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98 | jle @f |
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99 | mov ebx,[z2] |
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100 | @@: |
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101 | cmp [z3],ebx |
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102 | jle @f |
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103 | mov ebx,[z3] |
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104 | @@: |
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105 | mov ecx,0xffffffff |
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106 | sub ecx,ebx |
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107 | push ecx |
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108 | mov ecx,0xffffffff |
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109 | sub ecx,eax |
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110 | push ecx |
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111 | stdcall gl_add_select, [context] ;,0xffffffff-eax,0xffffffff-ebx |
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112 | ret |
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113 | endp |
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114 | |||
115 | ; point |
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116 | |||
6134 | IgorA | 117 | align 16 |
5153 | IgorA | 118 | proc gl_draw_point uses eax ebx, context:dword, p0:dword |
119 | mov ebx,[p0] |
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120 | cmp dword[ebx+offs_vert_clip_code],0 ;if (p0.clip_code == 0) |
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121 | jne @f |
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122 | mov eax,[context] |
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123 | cmp dword[eax+offs_cont_render_mode],GL_SELECT |
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124 | jne .els |
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125 | stdcall gl_add_select, eax,dword[ebx+offs_vert_zp+offs_zbup_z],dword[ebx+offs_vert_zp+offs_zbup_z] ;p0.zp.z,p0.zp.z |
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126 | jmp @f |
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6134 | IgorA | 127 | align 4 |
5153 | IgorA | 128 | .els: |
129 | add ebx,offs_vert_zp |
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130 | stdcall ZB_plot, dword[eax+offs_cont_zb],ebx |
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131 | @@: |
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132 | ret |
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133 | endp |
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134 | |||
135 | ; line |
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136 | |||
6134 | IgorA | 137 | align 16 |
5153 | IgorA | 138 | proc interpolate uses eax ebx ecx, q:dword,p0:dword,p1:dword,t:dword |
139 | mov eax,[q] |
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140 | mov ebx,[p0] |
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141 | mov ecx,[p1] |
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142 | fld dword[t] |
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143 | |||
144 | ; интерполяция по координатам |
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5353 | IgorA | 145 | fld dword[ecx+offs_vert_pc] |
146 | fsub dword[ebx+offs_vert_pc] |
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5153 | IgorA | 147 | fmul st0,st1 |
5353 | IgorA | 148 | fadd dword[ebx+offs_vert_pc] |
149 | fstp dword[eax+offs_vert_pc] ;q.pc.X = p0.pc.X + (p1.pc.X - p0.pc.X) * t |
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5153 | IgorA | 150 | |
5175 | IgorA | 151 | fld dword[ecx+offs_vert_pc+offs_Y] |
152 | fsub dword[ebx+offs_vert_pc+offs_Y] |
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5153 | IgorA | 153 | fmul st0,st1 |
5175 | IgorA | 154 | fadd dword[ebx+offs_vert_pc+offs_Y] |
155 | fstp dword[eax+offs_vert_pc+offs_Y] |
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5153 | IgorA | 156 | |
5175 | IgorA | 157 | fld dword[ecx+offs_vert_pc+offs_Z] |
158 | fsub dword[ebx+offs_vert_pc+offs_Z] |
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5153 | IgorA | 159 | fmul st0,st1 |
5175 | IgorA | 160 | fadd dword[ebx+offs_vert_pc+offs_Z] |
161 | fstp dword[eax+offs_vert_pc+offs_Z] |
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5153 | IgorA | 162 | |
5175 | IgorA | 163 | fld dword[ecx+offs_vert_pc+offs_W] |
164 | fsub dword[ebx+offs_vert_pc+offs_W] |
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5153 | IgorA | 165 | fmul st0,st1 |
5175 | IgorA | 166 | fadd dword[ebx+offs_vert_pc+offs_W] |
167 | fstp dword[eax+offs_vert_pc+offs_W] |
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5153 | IgorA | 168 | |
169 | ; интерполяция по цвету |
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170 | fld dword[ecx+offs_vert_color] |
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171 | fsub dword[ebx+offs_vert_color] |
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172 | fmul st0,st1 |
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173 | fadd dword[ebx+offs_vert_color] |
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174 | fstp dword[eax+offs_vert_color] |
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175 | |||
176 | fld dword[ecx+offs_vert_color+4] |
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177 | fsub dword[ebx+offs_vert_color+4] |
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178 | fmul st0,st1 |
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179 | fadd dword[ebx+offs_vert_color+4] |
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180 | fstp dword[eax+offs_vert_color+4] |
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181 | |||
182 | fld dword[ecx+offs_vert_color+8] |
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183 | fsub dword[ebx+offs_vert_color+8] |
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184 | fmul st0,st1 |
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185 | fadd dword[ebx+offs_vert_color+8] |
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186 | fstp dword[eax+offs_vert_color+8] |
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5208 | IgorA | 187 | |
188 | ffree st0 |
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189 | fincstp |
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5153 | IgorA | 190 | ret |
191 | endp |
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192 | |||
193 | ; |
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194 | ; Line Clipping |
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195 | ; |
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196 | |||
197 | ; Line Clipping algorithm from 'Computer Graphics', Principles and |
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198 | ; Practice |
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199 | ; tmin,tmax -> &float |
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6134 | IgorA | 200 | align 16 |
5153 | IgorA | 201 | proc ClipLine1 uses ebx, denom:dword,num:dword,tmin:dword,tmax:dword |
5278 | IgorA | 202 | fld dword[denom] |
203 | ftst |
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5153 | IgorA | 204 | fstsw ax |
205 | sahf |
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5278 | IgorA | 206 | jbe .els_0 ;if (denom>0) |
5153 | IgorA | 207 | fld dword[num] |
5278 | IgorA | 208 | fxch st1 |
209 | fdivp ;t=num/denom |
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5153 | IgorA | 210 | mov ebx,[tmax] |
211 | fcom dword[ebx] |
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212 | fstsw ax |
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213 | sahf |
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5278 | IgorA | 214 | ja .r0_f1 ;if (t>*tmax) return 0 |
5153 | IgorA | 215 | mov ebx,[tmin] |
216 | fcom dword[ebx] |
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217 | fstsw ax |
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218 | sahf |
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5278 | IgorA | 219 | jbe .r1_f1 ;if (t>*tmin) *tmin=t |
220 | fstp dword[ebx] |
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5153 | IgorA | 221 | jmp .r1 |
6134 | IgorA | 222 | align 4 |
5278 | IgorA | 223 | .els_0: ;else if (denom<0) |
224 | jae .els_1 |
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5153 | IgorA | 225 | fld dword[num] |
5278 | IgorA | 226 | fxch st1 |
227 | fdivp ;t=num/denom |
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5153 | IgorA | 228 | mov ebx,[tmin] |
229 | fcom dword[ebx] |
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230 | fstsw ax |
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231 | sahf |
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5278 | IgorA | 232 | jb .r0_f1 ;if (t<*tmin) return 0 |
5153 | IgorA | 233 | mov ebx,[tmax] |
234 | fcom dword[ebx] |
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235 | fstsw ax |
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236 | sahf |
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5278 | IgorA | 237 | jae .r1_f1 |
5153 | IgorA | 238 | fstp dword[ebx] ;if (t<*tmin) *tmax=t |
5278 | IgorA | 239 | jmp .r1 |
6134 | IgorA | 240 | align 4 |
5278 | IgorA | 241 | .els_1: ;else if (num>0) |
242 | ffree st0 ;denom |
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243 | fincstp |
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244 | fld dword[num] |
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245 | ftst |
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246 | fstsw ax |
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247 | sahf |
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248 | ja .r0_f1 ;if (num>0) return 0 |
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249 | jmp .r1_f1 |
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6134 | IgorA | 250 | align 4 |
5278 | IgorA | 251 | .r0_f1: ;return 0 & free st0 |
5218 | IgorA | 252 | ffree st0 |
253 | fincstp |
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5278 | IgorA | 254 | .r0: ;return 0 |
5153 | IgorA | 255 | xor eax,eax |
256 | jmp .end_f |
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6134 | IgorA | 257 | align 4 |
5278 | IgorA | 258 | .r1_f1: ;return 1 & free st0 |
5218 | IgorA | 259 | ffree st0 |
260 | fincstp |
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5278 | IgorA | 261 | .r1: ;return 1 |
5153 | IgorA | 262 | xor eax,eax |
263 | inc eax |
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264 | .end_f: |
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265 | ret |
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266 | endp |
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267 | |||
6134 | IgorA | 268 | align 16 |
5218 | IgorA | 269 | proc gl_draw_line, context:dword, p1:dword, p2:dword |
5153 | IgorA | 270 | locals |
271 | d_x dd ? |
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272 | d_y dd ? |
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273 | d_z dd ? |
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274 | d_w dd ? |
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275 | x1 dd ? |
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276 | y1 dd ? |
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277 | z1 dd ? |
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278 | w1 dd ? |
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279 | q1 GLVertex ? |
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280 | q2 GLVertex ? |
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281 | tmin dd ? ;ebp-8 |
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282 | tmax dd ? ;ebp-4 |
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283 | endl |
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5218 | IgorA | 284 | pushad |
5153 | IgorA | 285 | mov edx,[context] |
286 | mov edi,[p1] |
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287 | mov esi,[p2] |
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288 | |||
289 | cmp dword[edi+offs_vert_clip_code],0 |
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290 | jne .els_i |
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291 | cmp dword[esi+offs_vert_clip_code],0 |
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292 | jne .els_i |
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293 | ;if ( (p1.clip_code | p2.clip_code) == 0) |
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294 | cmp dword[edx+offs_cont_render_mode],GL_SELECT ;if (context.render_mode == GL_SELECT) |
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295 | jne .els_1 |
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296 | stdcall gl_add_select1, edx,dword[edi+offs_vert_zp+offs_zbup_z],\ |
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297 | dword[esi+offs_vert_zp+offs_zbup_z],dword[esi+offs_vert_zp+offs_zbup_z] |
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298 | jmp .end_f |
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6134 | IgorA | 299 | align 4 |
5153 | IgorA | 300 | .els_1: |
301 | add edi,offs_vert_zp |
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302 | add esi,offs_vert_zp |
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303 | push esi |
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304 | push edi |
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305 | push dword[edx+offs_cont_zb] |
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306 | cmp dword[edx+offs_cont_depth_test],0 |
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307 | je .els_2 |
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308 | ;if (context.depth_test) |
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309 | call ZB_line_z ;, dword[edx+offs_cont_zb],edi,esi |
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310 | jmp .end_f |
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6134 | IgorA | 311 | align 4 |
5153 | IgorA | 312 | .els_2: |
313 | call ZB_line ;, dword[edx+offs_cont_zb],edi,esi |
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314 | jmp .end_f |
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6134 | IgorA | 315 | align 4 |
5153 | IgorA | 316 | .els_i: |
317 | ;else if ( (p1.clip_code & p2.clip_code) != 0 ) |
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318 | mov eax,[edi+offs_vert_clip_code] |
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319 | and eax,[esi+offs_vert_clip_code] |
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6134 | IgorA | 320 | or eax,eax |
321 | jnz .end_f |
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5153 | IgorA | 322 | .els_0: |
323 | |||
324 | fld dword[esi+offs_vert_pc+offs_X] |
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325 | fsub dword[edi+offs_vert_pc+offs_X] |
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326 | fstp dword[d_x] ;d_x = p2.pc.X - p1.pc.X |
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327 | fld dword[esi+offs_vert_pc+offs_Y] |
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328 | fsub dword[edi+offs_vert_pc+offs_Y] |
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329 | fstp dword[d_y] ;d_y = p2.pc.Y - p1.pc.Y |
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330 | fld dword[esi+offs_vert_pc+offs_Z] |
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331 | fsub dword[edi+offs_vert_pc+offs_Z] |
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332 | fstp dword[d_z] ;d_z = p2.pc.Z - p1.pc.Z |
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333 | fld dword[esi+offs_vert_pc+offs_W] |
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334 | fsub dword[edi+offs_vert_pc+offs_W] |
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335 | fstp dword[d_w] ;d_w = p2.pc.W - p1.pc.W |
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336 | |||
337 | mov eax,[edi+offs_vert_pc+offs_X] |
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338 | mov [x1],eax ;x1 = p1.pc.X |
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339 | mov eax,[edi+offs_vert_pc+offs_Y] |
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340 | mov [y1],eax ;y1 = p1.pc.Y |
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341 | mov eax,[edi+offs_vert_pc+offs_Z] |
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342 | mov [z1],eax ;z1 = p1.pc.Z |
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343 | mov eax,[edi+offs_vert_pc+offs_W] |
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344 | mov [w1],eax ;w1 = p1.pc.W |
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345 | |||
346 | mov dword[tmin],0.0 |
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347 | mov dword[tmax],1.0 |
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348 | |||
349 | mov eax,ebp |
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350 | sub eax,4 |
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351 | push eax ;толкаем в стек адрес &tmax |
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352 | sub eax,4 |
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353 | push eax ;толкаем в стек адрес &tmin |
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354 | fld dword[x1] |
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355 | fadd dword[w1] |
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356 | fchs |
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357 | fstp dword[esp-4] |
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358 | fld dword[d_x] |
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359 | fadd dword[d_w] |
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360 | fstp dword[esp-8] |
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361 | sub esp,8 |
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362 | call ClipLine1 ;d_x+d_w,-x1-w1,&tmin,&tmax |
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363 | bt eax,0 |
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364 | jnc .end_f |
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365 | |||
366 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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367 | fld dword[x1] |
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368 | fsub dword[w1] |
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369 | fstp dword[esp-4] |
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370 | fld dword[d_w] |
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371 | fsub dword[d_x] |
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372 | fstp dword[esp-8] |
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373 | sub esp,8 |
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374 | call ClipLine1 ;-d_x+d_w,x1-w1,&tmin,&tmax |
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375 | bt eax,0 |
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376 | jnc .end_f |
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377 | |||
378 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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379 | fld dword[y1] |
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380 | fadd dword[w1] |
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381 | fchs |
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382 | fstp dword[esp-4] |
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383 | fld dword[d_y] |
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384 | fadd dword[d_w] |
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385 | fstp dword[esp-8] |
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386 | sub esp,8 |
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387 | call ClipLine1 ;d_y+d_w,-y1-w1,&tmin,&tmax |
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388 | bt eax,0 |
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389 | jnc .end_f |
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390 | |||
391 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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392 | fld dword[y1] |
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393 | fsub dword[w1] |
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394 | fstp dword[esp-4] |
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395 | fld dword[d_w] |
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396 | fsub dword[d_y] |
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397 | fstp dword[esp-8] |
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398 | sub esp,8 |
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399 | call ClipLine1 ;-d_y+d_w,y1-w1,&tmin,&tmax |
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400 | bt eax,0 |
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401 | jnc .end_f |
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402 | |||
403 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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404 | fld dword[z1] |
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405 | fadd dword[w1] |
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406 | fchs |
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407 | fstp dword[esp-4] |
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408 | fld dword[d_z] |
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409 | fadd dword[d_w] |
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410 | fstp dword[esp-8] |
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411 | sub esp,8 |
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412 | call ClipLine1 ;d_z+d_w,-z1-w1,&tmin,&tmax |
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413 | bt eax,0 |
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414 | jnc .end_f |
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415 | |||
416 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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417 | fld dword[z1] |
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418 | fsub dword[w1] |
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419 | fstp dword[esp-4] |
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420 | fld dword[d_w] |
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421 | fsub dword[d_z] |
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422 | fstp dword[esp-8] |
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423 | sub esp,8 |
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424 | call ClipLine1 ;-d_z+d_w,z1-w1,&tmin,&tmax |
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425 | bt eax,0 |
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426 | jnc .end_f |
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427 | |||
428 | mov eax,ebp |
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429 | sub eax,8+2*sizeof.GLVertex ;eax = &q1 |
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430 | stdcall interpolate, eax,edi,esi,[tmin] |
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431 | stdcall gl_transform_to_viewport, edx,eax |
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432 | add eax,sizeof.GLVertex ;eax = &q2 |
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433 | stdcall interpolate, eax,edi,esi,[tmax] |
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434 | stdcall gl_transform_to_viewport, edx,eax |
||
435 | |||
436 | sub eax,sizeof.GLVertex ;eax = &q1 |
||
437 | mov ebx,eax |
||
438 | add ebx,offs_vert_zp+offs_zbup_b |
||
439 | push ebx |
||
440 | add ebx,offs_zbup_g-offs_zbup_b |
||
441 | push ebx |
||
442 | add ebx,offs_zbup_r-offs_zbup_g |
||
443 | push ebx |
||
444 | stdcall RGBFtoRGBI, dword[eax+offs_vert_color],dword[eax+offs_vert_color+4],dword[eax+offs_vert_color+8] |
||
445 | |||
446 | add eax,sizeof.GLVertex ;eax = &q2 |
||
447 | mov ebx,eax |
||
448 | add ebx,offs_vert_zp+offs_zbup_b |
||
449 | push ebx |
||
450 | add ebx,offs_zbup_g-offs_zbup_b |
||
451 | push ebx |
||
452 | add ebx,offs_zbup_r-offs_zbup_g |
||
453 | push ebx |
||
454 | stdcall RGBFtoRGBI, dword[eax+offs_vert_color],dword[eax+offs_vert_color+4],dword[eax+offs_vert_color+8] |
||
455 | |||
456 | add eax,offs_vert_zp ;eax = &q2.zp |
||
457 | push eax |
||
458 | sub eax,sizeof.GLVertex ;eax = &q1.zp |
||
459 | push eax |
||
460 | push dword[edx+offs_cont_zb] |
||
461 | cmp dword[edx+offs_cont_depth_test],0 |
||
462 | je .els_3 |
||
463 | call ZB_line_z ;(context.zb,&q1.zp,&q2.zp) |
||
464 | jmp .end_f |
||
6134 | IgorA | 465 | align 4 |
5153 | IgorA | 466 | .els_3: |
467 | call ZB_line ;(context.zb,&q1.zp,&q2.zp) |
||
468 | .end_f: |
||
5218 | IgorA | 469 | popad |
5153 | IgorA | 470 | ret |
471 | endp |
||
472 | |||
473 | ; triangle |
||
474 | |||
475 | ; |
||
476 | ; Clipping |
||
477 | ; |
||
478 | |||
479 | ; We clip the segment [a,b] against the 6 planes of the normal volume. |
||
480 | ; We compute the point 'c' of intersection and the value of the parameter 't' |
||
481 | ; of the intersection if x=a+t(b-a). |
||
482 | ; |
||
483 | ; sign: 0 -> '-', 1 -> '+' |
||
484 | macro clip_func sign,dir,dir1,dir2 |
||
485 | { |
||
486 | locals |
||
487 | t dd ? |
||
488 | d_X dd ? |
||
489 | d_Y dd ? |
||
490 | d_Z dd ? |
||
491 | d_W dd ? |
||
492 | endl |
||
493 | mov edx,[a] |
||
494 | mov ebx,[b] |
||
495 | mov ecx,[c] |
||
5175 | IgorA | 496 | fld dword[ebx+offs_X] |
497 | fsub dword[edx+offs_X] |
||
5153 | IgorA | 498 | fstp dword[d_X] ;d_X = (b.X - a.X) |
5175 | IgorA | 499 | fld dword[ebx+offs_Y] |
500 | fsub dword[edx+offs_Y] |
||
5153 | IgorA | 501 | fstp dword[d_Y] ;d_Y = (b.Y - a.Y) |
5175 | IgorA | 502 | fld dword[ebx+offs_Z] |
503 | fsub dword[edx+offs_Z] |
||
5153 | IgorA | 504 | fstp dword[d_Z] ;d_Z = (b.Z - a.Z) |
5175 | IgorA | 505 | fld dword[ebx+offs_W] |
506 | fsub dword[edx+offs_W] |
||
5153 | IgorA | 507 | fst dword[d_W] ;d_W = (b.W - a.W) |
508 | if sign eq 0 |
||
509 | fadd dword[d#dir] |
||
510 | else |
||
511 | fsub dword[d#dir] |
||
512 | end if |
||
513 | |||
5218 | IgorA | 514 | ftst |
5153 | IgorA | 515 | fstsw ax |
516 | sahf |
||
5208 | IgorA | 517 | jne @f |
518 | fldz |
||
5153 | IgorA | 519 | fst dword[t] ;t=0 |
520 | jmp .e_zero |
||
6134 | IgorA | 521 | align 4 |
5153 | IgorA | 522 | @@: ;else |
523 | fld dword[edx+offs#dir] |
||
524 | if sign eq 0 |
||
525 | fchs |
||
526 | end if |
||
527 | fsub dword[edx+offs_W] |
||
528 | fdiv st0,st1 |
||
529 | fst dword[t] ;t = ( sign a.dir - a.W) / den |
||
530 | .e_zero: |
||
531 | |||
532 | fmul dword[d#dir1] ;st0 = t * d.dir1 |
||
533 | fadd dword[edx+offs#dir1] |
||
534 | fstp dword[ecx+offs#dir1] ;c.dir1 = a.dir1 + t * d.dir1 |
||
535 | |||
5208 | IgorA | 536 | ffree st0 |
537 | fincstp |
||
538 | |||
5153 | IgorA | 539 | fld dword[t] |
540 | fmul dword[d#dir2] ;st0 = t * d.dir2 |
||
541 | fadd dword[edx+offs#dir2] |
||
542 | fstp dword[ecx+offs#dir2] ;c.dir2 = a.dir2 + t * d.dir2 |
||
543 | |||
544 | fld dword[t] |
||
545 | fmul dword[d_W] |
||
546 | fadd dword[edx+offs_W] |
||
547 | fst dword[ecx+offs_W] ;c.W = a.W + t * d_W |
||
548 | |||
549 | if sign eq 0 |
||
550 | fchs |
||
551 | end if |
||
552 | fstp dword[ecx+offs#dir] ;c.dir = sign c.W |
||
553 | mov eax,[t] |
||
554 | } |
||
555 | |||
6134 | IgorA | 556 | align 16 |
5153 | IgorA | 557 | proc clip_xmin uses ebx ecx edx, c:dword, a:dword, b:dword |
558 | clip_func 0,_X,_Y,_Z |
||
559 | ret |
||
560 | endp |
||
561 | |||
6134 | IgorA | 562 | align 16 |
5153 | IgorA | 563 | proc clip_xmax uses ebx ecx edx, c:dword, a:dword, b:dword |
564 | clip_func 1,_X,_Y,_Z |
||
565 | ret |
||
566 | endp |
||
567 | |||
6134 | IgorA | 568 | align 16 |
5153 | IgorA | 569 | proc clip_ymin uses ebx ecx edx, c:dword, a:dword, b:dword |
570 | clip_func 0,_Y,_X,_Z |
||
571 | ret |
||
572 | endp |
||
573 | |||
6134 | IgorA | 574 | align 16 |
5153 | IgorA | 575 | proc clip_ymax uses ebx ecx edx, c:dword, a:dword, b:dword |
576 | clip_func 1,_Y,_X,_Z |
||
577 | ret |
||
578 | endp |
||
579 | |||
6134 | IgorA | 580 | align 16 |
5153 | IgorA | 581 | proc clip_zmin uses ebx ecx edx, c:dword, a:dword, b:dword |
582 | clip_func 0,_Z,_X,_Y |
||
583 | ret |
||
584 | endp |
||
585 | |||
6134 | IgorA | 586 | align 16 |
5153 | IgorA | 587 | proc clip_zmax uses ebx ecx edx, c:dword, a:dword, b:dword |
588 | clip_func 1,_Z,_X,_Y |
||
589 | ret |
||
590 | endp |
||
591 | |||
592 | align 4 |
||
593 | clip_proc dd clip_xmin,clip_xmax, clip_ymin,clip_ymax, clip_zmin,clip_zmax |
||
594 | |||
6134 | IgorA | 595 | align 16 |
5208 | IgorA | 596 | proc updateTmp uses eax ebx ecx edx, context:dword, q:dword, p0:dword, p1:dword, t:dword |
597 | mov ebx,[q] |
||
598 | mov edx,[context] |
||
599 | mov eax,[p0] |
||
5175 | IgorA | 600 | cmp dword[edx+offs_cont_current_shade_model],GL_SMOOTH ;if (context.current_shade_model == GL_SMOOTH) |
601 | jne .els_0 |
||
5208 | IgorA | 602 | mov ecx,[p1] |
603 | fld dword[ecx+offs_vert_color] |
||
604 | fsub dword[eax+offs_vert_color] |
||
605 | fmul dword[t] |
||
606 | fadd dword[eax+offs_vert_color] |
||
607 | fstp dword[ebx+offs_vert_color] ;q.color.v[0]=p0.color.v[0] + (p1.color.v[0]-p0.color.v[0])*t |
||
608 | fld dword[ecx+offs_vert_color+4] |
||
609 | fsub dword[eax+offs_vert_color+4] |
||
610 | fmul dword[t] |
||
611 | fadd dword[eax+offs_vert_color+4] |
||
612 | fstp dword[ebx+offs_vert_color+4] ;q.color.v[1]=p0.color.v[1] + (p1.color.v[1]-p0.color.v[1])*t |
||
613 | fld dword[ecx+offs_vert_color+8] |
||
614 | fsub dword[eax+offs_vert_color+8] |
||
615 | fmul dword[t] |
||
616 | fadd dword[eax+offs_vert_color+8] |
||
617 | fstp dword[ebx+offs_vert_color+8] ;q.color.v[2]=p0.color.v[2] + (p1.color.v[2]-p0.color.v[2])*t |
||
5175 | IgorA | 618 | jmp @f |
6134 | IgorA | 619 | align 4 |
5175 | IgorA | 620 | .els_0: |
5208 | IgorA | 621 | mov ecx,[eax+offs_vert_color] |
622 | mov [ebx+offs_vert_color],ecx ;q.color.v[0]=p0.color.v[0] |
||
623 | mov ecx,[eax+offs_vert_color+4] |
||
624 | mov [ebx+offs_vert_color+4],ecx ;q.color.v[1]=p0.color.v[1] |
||
625 | mov ecx,[eax+offs_vert_color+8] |
||
626 | mov [ebx+offs_vert_color+8],ecx ;q.color.v[2]=p0.color.v[2] |
||
5175 | IgorA | 627 | @@: |
5153 | IgorA | 628 | |
5175 | IgorA | 629 | cmp dword[edx+offs_cont_texture_2d_enabled],0 ;if (context.texture_2d_enabled) |
630 | je @f |
||
5208 | IgorA | 631 | mov ecx,[p1] |
632 | fld dword[ecx+offs_vert_tex_coord+offs_X] |
||
633 | fsub dword[eax+offs_vert_tex_coord+offs_X] |
||
634 | fmul dword[t] |
||
635 | fadd dword[eax+offs_vert_tex_coord+offs_X] |
||
636 | fstp dword[ebx+offs_vert_tex_coord+offs_X] ;q.tex_coord.X=p0.tex_coord.X + (p1.tex_coord.X-p0.tex_coord.X)*t |
||
637 | fld dword[ecx+offs_vert_tex_coord+offs_Y] |
||
638 | fsub dword[eax+offs_vert_tex_coord+offs_Y] |
||
639 | fmul dword[t] |
||
640 | fadd dword[eax+offs_vert_tex_coord+offs_Y] |
||
641 | fstp dword[ebx+offs_vert_tex_coord+offs_Y] ;q.tex_coord.Y=p0.tex_coord.Y + (p1.tex_coord.Y-p0.tex_coord.Y)*t |
||
5175 | IgorA | 642 | @@: |
5153 | IgorA | 643 | |
5208 | IgorA | 644 | stdcall gl_clipcode, [ebx+offs_vert_pc+offs_X],[ebx+offs_vert_pc+offs_Y],\ |
645 | [ebx+offs_vert_pc+offs_Z],[ebx+offs_vert_pc+offs_W] |
||
646 | mov dword[ebx+offs_vert_clip_code],eax |
||
5353 | IgorA | 647 | or eax,eax ;if (q.clip_code==0) |
648 | jnz @f |
||
5208 | IgorA | 649 | stdcall gl_transform_to_viewport,[context],ebx |
650 | mov eax,ebx |
||
651 | add eax,offs_vert_zp+offs_zbup_b |
||
652 | push eax |
||
653 | add eax,offs_zbup_g-offs_zbup_b |
||
654 | push eax |
||
655 | add eax,offs_zbup_r-offs_zbup_g |
||
656 | push eax |
||
657 | stdcall RGBFtoRGBI, dword[ebx+offs_vert_color],dword[ebx+offs_vert_color+4],dword[ebx+offs_vert_color+8] |
||
658 | @@: |
||
5175 | IgorA | 659 | ret |
660 | endp |
||
5153 | IgorA | 661 | |
6134 | IgorA | 662 | align 16 |
5175 | IgorA | 663 | proc gl_draw_triangle, context:dword, p0:dword, p1:dword, p2:dword |
664 | locals |
||
665 | cc rd 3 |
||
666 | front dd ? |
||
667 | norm dd ? ;float |
||
668 | endl |
||
669 | pushad |
||
670 | mov ebx,[p0] |
||
671 | mov ecx,[p1] |
||
672 | mov edx,[p2] |
||
673 | mov edi,[ebx+offs_vert_clip_code] |
||
674 | mov dword[cc],edi |
||
675 | mov eax,[ecx+offs_vert_clip_code] |
||
676 | mov dword[cc+4],eax |
||
677 | or edi,eax |
||
678 | mov eax,[edx+offs_vert_clip_code] |
||
679 | mov dword[cc+8],eax |
||
5208 | IgorA | 680 | or edi,eax ;co = cc[0] | cc[1] | cc[2] |
5153 | IgorA | 681 | |
5175 | IgorA | 682 | ; we handle the non clipped case here to go faster |
5353 | IgorA | 683 | ;or edi,___ - было выше |
684 | jnz .els_0 |
||
685 | ;if (co==0) |
||
5175 | IgorA | 686 | mov edi,dword[edx+offs_vert_zp+offs_zbup_x] |
5208 | IgorA | 687 | sub edi,dword[ebx+offs_vert_zp+offs_zbup_x] |
5418 | IgorA | 688 | mov dword[norm],edi ;p2.x-p0.x |
5175 | IgorA | 689 | fild dword[norm] |
5213 | IgorA | 690 | mov edi,dword[ecx+offs_vert_zp+offs_zbup_y] |
691 | sub edi,dword[ebx+offs_vert_zp+offs_zbup_y] |
||
5418 | IgorA | 692 | mov dword[norm],edi ;p1.y-p0.y |
5175 | IgorA | 693 | fimul dword[norm] |
5418 | IgorA | 694 | fchs |
5175 | IgorA | 695 | mov edi,dword[ecx+offs_vert_zp+offs_zbup_x] |
696 | sub edi,dword[ebx+offs_vert_zp+offs_zbup_x] |
||
5418 | IgorA | 697 | mov dword[norm],edi ;p1.x-p0.x |
5175 | IgorA | 698 | fild dword[norm] |
699 | mov edi,dword[edx+offs_vert_zp+offs_zbup_y] |
||
5208 | IgorA | 700 | sub edi,dword[ebx+offs_vert_zp+offs_zbup_y] |
5418 | IgorA | 701 | mov dword[norm],edi ;p2.y-p0.y |
5175 | IgorA | 702 | fimul dword[norm] |
5418 | IgorA | 703 | faddp |
5175 | IgorA | 704 | ;st0 = (p1.zp.x-p0.zp.x)*(p2.zp.y-p0.zp.y) - (p2.zp.x-p0.zp.x)*(p1.zp.y-p0.zp.y) |
5153 | IgorA | 705 | |
5175 | IgorA | 706 | mov dword[front],0 |
5418 | IgorA | 707 | ftst |
5175 | IgorA | 708 | fstsw ax |
5418 | IgorA | 709 | ffree st0 |
710 | fincstp |
||
5175 | IgorA | 711 | sahf |
712 | je .end_f |
||
5418 | IgorA | 713 | jae @f |
714 | inc dword[front] ;front = norm < 0.0 |
||
5175 | IgorA | 715 | @@: |
716 | mov edi,[context] |
||
717 | mov eax,dword[edi+offs_cont_current_front_face] |
||
718 | xor dword[front],eax ;front ^= context.current_front_face |
||
5418 | IgorA | 719 | |
5175 | IgorA | 720 | ; back face culling |
721 | cmp dword[edi+offs_cont_cull_face_enabled],0 |
||
722 | je .els_1 |
||
723 | ; most used case first |
||
724 | cmp dword[edi+offs_cont_current_cull_face],GL_BACK |
||
725 | jne @f |
||
726 | cmp dword[front],0 |
||
727 | je .end_f |
||
728 | stdcall dword[edi+offs_cont_draw_triangle_front], edi,ebx,ecx,edx |
||
729 | jmp .end_f |
||
6134 | IgorA | 730 | align 4 |
5175 | IgorA | 731 | @@: |
732 | cmp dword[edi+offs_cont_current_cull_face],GL_FRONT |
||
733 | jne .end_f |
||
734 | cmp dword[front],0 |
||
735 | jne .end_f |
||
736 | stdcall dword[edi+offs_cont_draw_triangle_back], edi,ebx,ecx,edx |
||
737 | jmp .end_f |
||
6134 | IgorA | 738 | align 4 |
5175 | IgorA | 739 | .els_1: |
740 | ; no culling |
||
741 | cmp dword[front],0 |
||
742 | je @f |
||
743 | stdcall dword[edi+offs_cont_draw_triangle_front], edi,ebx,ecx,edx |
||
5213 | IgorA | 744 | jmp .end_f |
6134 | IgorA | 745 | align 4 |
5175 | IgorA | 746 | @@: |
747 | stdcall dword[edi+offs_cont_draw_triangle_back], edi,ebx,ecx,edx |
||
748 | jmp .end_f |
||
6134 | IgorA | 749 | align 4 |
5175 | IgorA | 750 | .els_0: |
5208 | IgorA | 751 | ;eax = cc[2] |
5175 | IgorA | 752 | and eax,[cc] |
5208 | IgorA | 753 | and eax,[cc+4] ;eax = c_and = cc[0] & cc[1] & cc[2] |
5353 | IgorA | 754 | or eax,eax ;if (c_and==0) |
755 | jnz .end_f |
||
5175 | IgorA | 756 | stdcall gl_draw_triangle_clip, [context],ebx,ecx,edx,0 |
757 | .end_f: |
||
758 | popad |
||
759 | ret |
||
760 | endp |
||
5153 | IgorA | 761 | |
6134 | IgorA | 762 | align 16 |
5175 | IgorA | 763 | proc gl_draw_triangle_clip, context:dword, p0:dword, p1:dword, p2:dword, clip_bit:dword |
764 | locals |
||
765 | co dd ? |
||
766 | cc rd 3 |
||
767 | edge_flag_tmp dd ? |
||
768 | clip_mask dd ? |
||
5208 | IgorA | 769 | q rd 3 ;GLVertex* |
5175 | IgorA | 770 | tmp1 GLVertex ? |
771 | tmp2 GLVertex ? |
||
772 | endl |
||
773 | pushad |
||
774 | mov ebx,[p0] |
||
775 | mov ecx,[p1] |
||
776 | mov edx,[p2] |
||
5208 | IgorA | 777 | |
5175 | IgorA | 778 | mov edi,[ebx+offs_vert_clip_code] |
5208 | IgorA | 779 | mov [cc],edi |
5175 | IgorA | 780 | mov eax,[ecx+offs_vert_clip_code] |
5208 | IgorA | 781 | mov [cc+4],eax |
5175 | IgorA | 782 | or edi,eax |
783 | mov eax,[edx+offs_vert_clip_code] |
||
5208 | IgorA | 784 | mov [cc+8],eax |
5175 | IgorA | 785 | or edi,eax |
5208 | IgorA | 786 | mov [co],edi ;co = cc[0] | cc[1] | cc[2] |
5175 | IgorA | 787 | |
5353 | IgorA | 788 | or edi,edi ;if (co == 0) |
789 | jnz .els_0 |
||
5175 | IgorA | 790 | stdcall gl_draw_triangle, [context],ebx,ecx,edx |
791 | jmp .end_f |
||
6134 | IgorA | 792 | align 4 |
5175 | IgorA | 793 | .els_0: |
5208 | IgorA | 794 | ;eax = cc[2] |
5175 | IgorA | 795 | and eax,[cc] |
5208 | IgorA | 796 | and eax,[cc+4] ;c_and = cc[0] & cc[1] & cc[2] |
5175 | IgorA | 797 | |
798 | ; the triangle is completely outside |
||
5353 | IgorA | 799 | or eax,eax ;if (c_and!=0) return |
800 | jnz .end_f |
||
5175 | IgorA | 801 | |
5208 | IgorA | 802 | ; find the next direction to clip |
803 | .cycle_0: ;while (clip_bit < 6 && (co & (1 << clip_bit)) == 0) |
||
804 | cmp dword[clip_bit],6 |
||
805 | jge .cycle_0_end |
||
806 | xor eax,eax |
||
807 | inc eax |
||
808 | mov ecx,[clip_bit] |
||
809 | shl eax,cl |
||
810 | and eax,[co] |
||
5353 | IgorA | 811 | or eax,eax |
812 | jnz .cycle_0_end |
||
5208 | IgorA | 813 | inc dword[clip_bit] |
814 | jmp .cycle_0 |
||
6134 | IgorA | 815 | align 4 |
5208 | IgorA | 816 | .cycle_0_end: |
5153 | IgorA | 817 | |
5175 | IgorA | 818 | ; this test can be true only in case of rounding errors |
819 | cmp dword[clip_bit],6 |
||
820 | if 0 |
||
821 | jne @f |
||
5153 | IgorA | 822 | ; printf("Error:\n"); |
823 | ; printf("%f %f %f %f\n",p0->pc.X,p0->pc.Y,p0->pc.Z,p0->pc.W); |
||
824 | ; printf("%f %f %f %f\n",p1->pc.X,p1->pc.Y,p1->pc.Z,p1->pc.W); |
||
825 | ; printf("%f %f %f %f\n",p2->pc.X,p2->pc.Y,p2->pc.Z,p2->pc.W); |
||
5175 | IgorA | 826 | jmp .end_f |
827 | @@: |
||
5208 | IgorA | 828 | end if |
829 | if 1 |
||
5175 | IgorA | 830 | je .end_f |
831 | end if |
||
5153 | IgorA | 832 | |
5208 | IgorA | 833 | xor eax,eax |
834 | inc eax |
||
835 | mov ecx,[clip_bit] |
||
836 | shl eax,cl |
||
837 | mov [clip_mask],eax ;1 << clip_bit |
||
838 | mov edi,[cc] |
||
839 | xor edi,[cc+4] |
||
840 | xor edi,[cc+8] |
||
841 | and eax,edi ;eax = co1 = (cc[0] ^ cc[1] ^ cc[2]) & clip_mask |
||
5153 | IgorA | 842 | |
5208 | IgorA | 843 | mov ecx,[p1] ;востанавливаем после shl ___,cl |
5153 | IgorA | 844 | |
5353 | IgorA | 845 | or eax,eax ;if (co1) |
846 | jz .els_1 |
||
5208 | IgorA | 847 | ; one point outside |
848 | mov eax,[cc] |
||
849 | and eax,[clip_mask] |
||
5353 | IgorA | 850 | or eax,eax ;if (cc[0] & clip_mask) |
851 | jz .els_2 |
||
5208 | IgorA | 852 | ;q[0]=p0 q[1]=p1 q[2]=p2 |
853 | mov [q],ebx |
||
854 | mov [q+4],ecx |
||
855 | mov [q+8],edx |
||
856 | jmp .els_2_end |
||
6134 | IgorA | 857 | align 4 |
5208 | IgorA | 858 | .els_2: |
859 | mov eax,[cc+4] |
||
860 | and eax,[clip_mask] |
||
5353 | IgorA | 861 | or eax,eax ;else if (cc[1] & clip_mask) |
862 | jz .els_3 |
||
5208 | IgorA | 863 | ;q[0]=p1 q[1]=p2 q[2]=p0 |
864 | mov [q],ecx |
||
865 | mov [q+4],edx |
||
866 | mov [q+8],ebx |
||
867 | jmp .els_2_end |
||
6134 | IgorA | 868 | align 4 |
5208 | IgorA | 869 | .els_3: |
870 | ;q[0]=p2 q[1]=p0 q[2]=p1 |
||
871 | mov [q],edx |
||
872 | mov [q+4],ebx |
||
873 | mov [q+8],ecx |
||
874 | .els_2_end: |
||
5153 | IgorA | 875 | |
5208 | IgorA | 876 | mov ebx,[q] |
877 | add ebx,offs_vert_pc |
||
878 | mov ecx,[q+4] |
||
879 | add ecx,offs_vert_pc |
||
880 | mov edx,[q+8] |
||
881 | add edx,offs_vert_pc |
||
5153 | IgorA | 882 | |
5208 | IgorA | 883 | lea eax,[clip_proc] |
884 | mov edi,[clip_bit] |
||
885 | shl edi,2 |
||
886 | add eax,edi |
||
887 | mov edi,ebp |
||
888 | sub edi,(2*sizeof.GLVertex)-offs_vert_pc |
||
889 | stdcall dword[eax],edi,ebx,ecx ;clip_proc[clip_bit](&tmp1.pc,&q[0].pc,&q[1].pc) |
||
890 | sub edi,offs_vert_pc |
||
5153 | IgorA | 891 | |
5208 | IgorA | 892 | sub ebx,offs_vert_pc |
893 | sub ecx,offs_vert_pc |
||
894 | stdcall updateTmp,[context],edi,ebx,ecx,eax ;updateTmp(c,&tmp1,q[0],q[1],tt) |
||
895 | add ebx,offs_vert_pc |
||
5153 | IgorA | 896 | |
5208 | IgorA | 897 | lea eax,[clip_proc] |
898 | mov edi,[clip_bit] |
||
899 | shl edi,2 |
||
900 | add eax,edi |
||
901 | mov edi,ebp |
||
902 | sub edi,sizeof.GLVertex-offs_vert_pc |
||
903 | stdcall dword[eax],edi,ebx,edx ;clip_proc[clip_bit](&tmp2.pc,&q[0].pc,&q[2].pc) |
||
904 | sub edi,offs_vert_pc |
||
905 | sub ebx,offs_vert_pc |
||
906 | sub edx,offs_vert_pc |
||
907 | stdcall updateTmp,[context],edi,ebx,edx,eax ;updateTmp(c,&tmp2,q[0],q[2],tt) |
||
908 | |||
909 | mov eax,[ebx+offs_vert_edge_flag] |
||
5353 | IgorA | 910 | mov [tmp1.edge_flag],eax ;q[0].edge_flag |
5208 | IgorA | 911 | mov eax,[edx+offs_vert_edge_flag] |
912 | mov [edge_flag_tmp],eax ;q[2].edge_flag |
||
913 | mov dword[edx+offs_vert_edge_flag],0 ;q[2].edge_flag=0 |
||
914 | mov eax,[clip_bit] |
||
915 | inc eax |
||
916 | push eax ;для вызова нижней функции |
||
917 | mov edi,ebp |
||
918 | sub edi,2*sizeof.GLVertex |
||
919 | stdcall gl_draw_triangle_clip,[context],edi,ecx,edx,eax ;gl_draw_triangle_clip(c,&tmp1,q[1],q[2],clip_bit+1) |
||
920 | |||
921 | mov dword[tmp2.edge_flag],0 |
||
922 | mov dword[tmp1.edge_flag],0 |
||
923 | mov eax,[edge_flag_tmp] |
||
924 | mov [edx+offs_vert_edge_flag],eax ;q[2].edge_flag=edge_flag_tmp |
||
925 | push edx |
||
926 | push edi |
||
927 | add edi,sizeof.GLVertex ;edi = &tmp2 |
||
928 | stdcall gl_draw_triangle_clip,[context],edi ;gl_draw_triangle_clip(c,&tmp2,&tmp1,q[2],clip_bit+1) |
||
929 | jmp .end_f |
||
6134 | IgorA | 930 | align 4 |
5208 | IgorA | 931 | .els_1: |
932 | ; two points outside |
||
933 | mov eax,[cc] |
||
934 | and eax,[clip_mask] |
||
935 | cmp eax,0 ;if (cc[0] & clip_mask)==0 |
||
936 | jne .els_4 |
||
937 | ;q[0]=p0 q[1]=p1 q[2]=p2 |
||
938 | mov [q],ebx |
||
939 | mov [q+4],ecx |
||
940 | mov [q+8],edx |
||
941 | jmp .els_4_end |
||
6134 | IgorA | 942 | align 4 |
5208 | IgorA | 943 | .els_4: |
944 | mov eax,[cc+4] |
||
945 | and eax,[clip_mask] |
||
946 | cmp eax,0 ;else if (cc[1] & clip_mask)==0 |
||
947 | jne .els_5 |
||
948 | ;q[0]=p1 q[1]=p2 q[2]=p0 |
||
949 | mov [q],ecx |
||
950 | mov [q+4],edx |
||
951 | mov [q+8],ebx |
||
952 | jmp .els_4_end |
||
6134 | IgorA | 953 | align 4 |
5208 | IgorA | 954 | .els_5: |
955 | ;q[0]=p2 q[1]=p0 q[2]=p1 |
||
956 | mov [q],edx |
||
957 | mov [q+4],ebx |
||
958 | mov [q+8],ecx |
||
959 | .els_4_end: |
||
960 | |||
961 | mov ebx,[q] |
||
962 | add ebx,offs_vert_pc |
||
963 | mov ecx,[q+4] |
||
964 | add ecx,offs_vert_pc |
||
965 | mov edx,[q+8] |
||
966 | add edx,offs_vert_pc |
||
967 | |||
968 | lea eax,[clip_proc] |
||
969 | mov edi,[clip_bit] |
||
970 | shl edi,2 |
||
971 | add eax,edi |
||
972 | mov edi,ebp |
||
973 | sub edi,(2*sizeof.GLVertex)-offs_vert_pc |
||
974 | stdcall dword[eax],edi,ebx,ecx ;clip_proc[clip_bit](&tmp1.pc,&q[0].pc,&q[1].pc) |
||
975 | sub edi,offs_vert_pc |
||
976 | stdcall updateTmp,[context],edi,[q],[q+4],eax |
||
977 | |||
978 | lea eax,[clip_proc] |
||
979 | mov edi,[clip_bit] |
||
980 | shl edi,2 |
||
981 | add eax,edi |
||
982 | mov edi,ebp |
||
983 | sub edi,sizeof.GLVertex-offs_vert_pc |
||
984 | stdcall dword[eax],edi,ebx,edx ;clip_proc[clip_bit](&tmp2.pc,&q[0].pc,&q[2].pc) |
||
985 | sub edi,offs_vert_pc |
||
986 | stdcall updateTmp,[context],edi,[q],[q+8],eax |
||
987 | |||
5353 | IgorA | 988 | mov dword[tmp1.edge_flag],1 |
989 | mov eax,[edx+offs_vert_edge_flag-offs_vert_pc] |
||
990 | mov dword[tmp2.edge_flag],eax ;tmp2.edge_flag = q[2].edge_flag |
||
5208 | IgorA | 991 | mov eax,[clip_bit] |
992 | inc eax |
||
993 | push eax |
||
994 | push edi |
||
995 | sub edi,sizeof.GLVertex |
||
996 | stdcall gl_draw_triangle_clip,[context],[q],edi ;gl_draw_triangle_clip(c,q[0],&tmp1,&tmp2,clip_bit+1) |
||
5175 | IgorA | 997 | .end_f: |
998 | popad |
||
999 | ret |
||
1000 | endp |
||
5153 | IgorA | 1001 | |
6134 | IgorA | 1002 | align 16 |
5153 | IgorA | 1003 | proc gl_draw_triangle_select uses eax, context:dword, p0:dword,p1:dword,p2:dword |
1004 | mov eax,[p2] |
||
1005 | push dword[eax+offs_vert_zp+offs_Z] |
||
1006 | mov eax,[p1] |
||
1007 | push dword[eax+offs_vert_zp+offs_Z] |
||
1008 | mov eax,[p0] |
||
1009 | push dword[eax+offs_vert_zp+offs_Z] |
||
1010 | stdcall gl_add_select1, [context] ;,p0.zp.z, p1.zp.z, p2.zp.z |
||
1011 | ret |
||
1012 | endp |
||
1013 | |||
5175 | IgorA | 1014 | if PROFILE eq 1 |
1015 | count_triangles dd ? |
||
1016 | count_triangles_textured dd ? |
||
1017 | count_pixels dd ? |
||
1018 | end if |
||
5153 | IgorA | 1019 | |
6134 | IgorA | 1020 | align 16 |
5175 | IgorA | 1021 | proc gl_draw_triangle_fill, context:dword, p0:dword,p1:dword,p2:dword |
1022 | pushad |
||
1023 | if PROFILE eq 1 |
||
5153 | IgorA | 1024 | ; int norm; |
1025 | ; assert(p0->zp.x >= 0 && p0->zp.x < c->zb->xsize); |
||
1026 | ; assert(p0->zp.y >= 0 && p0->zp.y < c->zb->ysize); |
||
1027 | ; assert(p1->zp.x >= 0 && p1->zp.x < c->zb->xsize); |
||
1028 | ; assert(p1->zp.y >= 0 && p1->zp.y < c->zb->ysize); |
||
1029 | ; assert(p2->zp.x >= 0 && p2->zp.x < c->zb->xsize); |
||
1030 | ; assert(p2->zp.y >= 0 && p2->zp.y < c->zb->ysize); |
||
1031 | |||
1032 | ; norm=(p1->zp.x-p0->zp.x)*(p2->zp.y-p0->zp.y)- |
||
1033 | ; (p2->zp.x-p0->zp.x)*(p1->zp.y-p0->zp.y); |
||
1034 | ; count_pixels+=abs(norm)/2; |
||
5175 | IgorA | 1035 | inc dword[count_triangles] |
1036 | end if |
||
5153 | IgorA | 1037 | |
5175 | IgorA | 1038 | mov ebx,[p1] |
1039 | add ebx,offs_vert_zp |
||
1040 | mov ecx,[p2] |
||
1041 | add ecx,offs_vert_zp |
||
5153 | IgorA | 1042 | mov edx,[context] |
1043 | cmp dword[edx+offs_cont_texture_2d_enabled],0 |
||
1044 | je .els_i |
||
1045 | ;if (context.texture_2d_enabled) |
||
5175 | IgorA | 1046 | if PROFILE eq 1 |
1047 | inc dword[count_triangles_textured] |
||
1048 | end if |
||
5153 | IgorA | 1049 | mov eax,dword[edx+offs_cont_current_texture] |
1050 | mov eax,[eax] ;переход по указателю |
||
1051 | ;так как offs_text_images+offs_imag_pixmap = 0 то context.current_texture.images[0].pixmap = [eax] |
||
1052 | stdcall ZB_setTexture, dword[edx+offs_cont_zb],dword[eax] |
||
5175 | IgorA | 1053 | mov eax,[p0] |
1054 | add eax,offs_vert_zp |
||
6134 | IgorA | 1055 | push ecx |
1056 | push ebx |
||
1057 | push eax |
||
1058 | push dword[edx+offs_cont_zb] |
||
1059 | cmp dword[edx+offs_cont_matrix_model_projection_no_w_transform],0 |
||
1060 | je @f |
||
1061 | call ZB_fillTriangleMappingPerspective |
||
1062 | jmp .end_f |
||
1063 | align 4 |
||
1064 | @@: |
||
1065 | call ZB_fillTriangleMapping |
||
5153 | IgorA | 1066 | jmp .end_f |
6134 | IgorA | 1067 | align 4 |
5153 | IgorA | 1068 | .els_i: |
5175 | IgorA | 1069 | mov eax,[p0] |
1070 | add eax,offs_vert_zp |
||
1071 | cmp dword[edx+offs_cont_current_shade_model],GL_SMOOTH |
||
1072 | jne .els |
||
1073 | ;else if (context.current_shade_model == GL_SMOOTH) |
||
1074 | stdcall ZB_fillTriangleSmooth, dword[edx+offs_cont_zb],eax,ebx,ecx |
||
1075 | jmp .end_f |
||
6134 | IgorA | 1076 | align 4 |
5175 | IgorA | 1077 | .els: |
1078 | stdcall ZB_fillTriangleFlat, dword[edx+offs_cont_zb],eax,ebx,ecx |
||
5153 | IgorA | 1079 | .end_f: |
5175 | IgorA | 1080 | popad |
5153 | IgorA | 1081 | ret |
1082 | endp |
||
1083 | |||
1084 | ; Render a clipped triangle in line mode |
||
1085 | |||
6134 | IgorA | 1086 | align 16 |
5153 | IgorA | 1087 | proc gl_draw_triangle_line uses eax ebx ecx edx, context:dword, p0:dword,p1:dword,p2:dword |
1088 | mov edx,[context] |
||
1089 | cmp dword[edx+offs_cont_depth_test],0 |
||
1090 | je .els |
||
1091 | lea ecx,[ZB_line_z] |
||
1092 | jmp @f |
||
6134 | IgorA | 1093 | align 4 |
5153 | IgorA | 1094 | .els: |
1095 | lea ecx,[ZB_line] |
||
1096 | @@: |
||
1097 | |||
1098 | ;if (p0.edge_flag) ZB_line_z(context.zb,&p0.zp,&p1.zp) |
||
1099 | mov eax,[p0] |
||
1100 | cmp dword[eax+offs_vert_edge_flag],0 |
||
1101 | je @f |
||
1102 | mov ebx,eax |
||
1103 | add ebx,offs_vert_zp |
||
1104 | mov eax,[p1] |
||
1105 | add eax,offs_vert_zp |
||
1106 | stdcall ecx,dword[edx+offs_cont_zb],ebx,eax |
||
1107 | @@: |
||
1108 | ;if (p1.edge_flag) ZB_line_z(context.zb,&p1.zp,&p2.zp) |
||
1109 | mov eax,[p1] |
||
1110 | cmp dword[eax+offs_vert_edge_flag],0 |
||
1111 | je @f |
||
1112 | mov ebx,eax |
||
1113 | add ebx,offs_vert_zp |
||
1114 | mov eax,[p2] |
||
1115 | add eax,offs_vert_zp |
||
1116 | stdcall ecx,dword[edx+offs_cont_zb],ebx,eax |
||
1117 | @@: |
||
1118 | ;if (p2.edge_flag) ZB_line_z(context.zb,&p2.zp,&p0.zp); |
||
1119 | mov eax,[p2] |
||
1120 | cmp dword[eax+offs_vert_edge_flag],0 |
||
1121 | je @f |
||
1122 | mov ebx,eax |
||
1123 | add ebx,offs_vert_zp |
||
1124 | mov eax,[p0] |
||
1125 | add eax,offs_vert_zp |
||
1126 | stdcall ecx,dword[edx+offs_cont_zb],ebx,eax |
||
1127 | @@: |
||
1128 | |||
1129 | ret |
||
1130 | endp |
||
1131 | |||
1132 | ; Render a clipped triangle in point mode |
||
6134 | IgorA | 1133 | align 16 |
5153 | IgorA | 1134 | proc gl_draw_triangle_point uses eax ebx edx, context:dword, p0:dword,p1:dword,p2:dword |
1135 | mov edx,[context] |
||
1136 | mov eax,[p0] |
||
1137 | cmp dword[eax+offs_vert_edge_flag],0 |
||
1138 | je @f |
||
1139 | mov ebx,eax |
||
1140 | add ebx,offs_vert_zp |
||
1141 | stdcall ZB_plot,dword[edx+offs_cont_zb],ebx |
||
1142 | @@: |
||
5187 | IgorA | 1143 | mov eax,[p1] |
5153 | IgorA | 1144 | cmp dword[eax+offs_vert_edge_flag],0 |
1145 | je @f |
||
1146 | mov ebx,eax |
||
1147 | add ebx,offs_vert_zp |
||
1148 | stdcall ZB_plot,dword[edx+offs_cont_zb],ebx |
||
1149 | @@: |
||
5187 | IgorA | 1150 | mov eax,[p2] |
5153 | IgorA | 1151 | cmp dword[eax+offs_vert_edge_flag],0 |
1152 | je @f |
||
1153 | mov ebx,eax |
||
1154 | add ebx,offs_vert_zp |
||
1155 | stdcall ZB_plot,dword[edx+offs_cont_zb],ebx |
||
1156 | @@: |
||
1157 | ret |
||
1158 | endp>>>>>>><>><>>>*tmin)>*tmin)>0) |
||
1159 | |||
1160 | |||
1161 | |||
1162 |