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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 | |||
11 | offs_X equ 0 |
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12 | offs_Y equ 4 |
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13 | offs_Z equ 8 |
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14 | offs_W equ 12 |
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15 | |||
16 | align 4 |
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17 | proc gl_transform_to_viewport uses eax ebx ecx, context:dword,v:dword |
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18 | locals |
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19 | point dd ? |
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20 | endl |
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21 | mov eax,[context] |
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22 | mov ebx,[v] |
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23 | |||
24 | ; coordinates |
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25 | fld1 |
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26 | fdiv dword[ebx+offs_vert_pc+offs_W] ;st0 = 1/v.pc.W |
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27 | |||
28 | fld dword[ebx+offs_vert_pc+offs_X] ;st0 = v.pc.X |
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29 | fmul st0,st1 |
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30 | fmul dword[eax+offs_cont_viewport+offs_vpor_scale+offs_X] |
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31 | fadd dword[eax+offs_cont_viewport+offs_vpor_trans+offs_X] |
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32 | fistp dword[ebx+offs_vert_zp] ;v.zp.x = st0, st0 = st1 |
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33 | |||
34 | fld dword[ebx+offs_vert_pc+offs_Y] ;st0 = v.pc.Y |
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35 | fmul st0,st1 |
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36 | fmul dword[eax+offs_cont_viewport+offs_vpor_scale+offs_Y] |
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37 | fadd dword[eax+offs_cont_viewport+offs_vpor_trans+offs_Y] |
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38 | fistp dword[ebx+offs_vert_zp+offs_zbup_y] ;v.zp.y = st0, st0 = st1 |
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39 | |||
40 | fld dword[ebx+offs_vert_pc+offs_Z] ;st0 = v.pc.Z |
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41 | fmul st0,st1 |
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42 | fmul dword[eax+offs_cont_viewport+offs_vpor_scale+offs_Z] |
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43 | fadd dword[eax+offs_cont_viewport+offs_vpor_trans+offs_Z] |
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44 | fistp dword[ebx+offs_vert_zp+offs_zbup_z] ;v.zp.z = st0, st0 = st1 |
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45 | |||
46 | ; color |
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47 | bt dword[eax+offs_cont_lighting_enabled],0 |
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48 | jnc @f |
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49 | mov ecx,ebx |
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50 | add ecx,offs_vert_zp+offs_zbup_b |
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51 | push ecx |
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52 | add ecx,offs_zbup_g-offs_zbup_b |
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53 | push ecx |
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54 | add ecx,offs_zbup_r-offs_zbup_g |
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55 | push ecx |
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56 | stdcall RGBFtoRGBI, dword[ebx+offs_vert_color],dword[ebx+offs_vert_color+4],dword[ebx+offs_vert_color+8] |
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57 | jmp .end_if |
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58 | @@: |
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59 | ; no need to convert to integer if no lighting : take current color |
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60 | push ecx |
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61 | mov ecx,[eax+offs_cont_longcurrent_color] |
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62 | mov dword[ebx+offs_vert_zp+offs_zbup_r],ecx |
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63 | mov ecx,[eax+offs_cont_longcurrent_color+4] |
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64 | mov dword[ebx+offs_vert_zp+offs_zbup_g],ecx |
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65 | mov ecx,[eax+offs_cont_longcurrent_color+8] |
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66 | mov dword[ebx+offs_vert_zp+offs_zbup_b],ecx |
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67 | pop ecx |
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68 | .end_if: |
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69 | |||
70 | ; texture |
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71 | bt dword[eax+offs_cont_texture_2d_enabled],0 |
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72 | jnc @f |
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73 | mov dword[point],dword(ZB_POINT_S_MAX - ZB_POINT_S_MIN) |
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74 | fild dword[point] |
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75 | fmul dword[ebx+offs_vert_tex_coord] ;st0 *= v.tex_coord.X |
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76 | fistp dword[ebx+offs_vert_zp+offs_zbup_s] |
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77 | add dword[ebx+offs_vert_zp+offs_zbup_s],ZB_POINT_S_MIN |
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78 | |||
79 | mov dword[point],dword(ZB_POINT_T_MAX - ZB_POINT_T_MIN) |
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80 | fild dword[point] |
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81 | fmul dword[ebx+offs_vert_tex_coord+4] ;st0 *= v.tex_coord.Y |
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82 | fistp dword[ebx+offs_vert_zp+offs_zbup_t] |
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83 | add dword[ebx+offs_vert_zp+offs_zbup_s],ZB_POINT_T_MIN |
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84 | @@: |
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85 | if DEBUG ;gl_transform_to_viewport |
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86 | push edi |
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87 | mov ecx,80 |
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88 | mov eax,[ebx+offs_vert_zp] |
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89 | lea edi,[buf_param] |
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90 | stdcall convert_int_to_str,ecx |
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91 | stdcall str_n_cat,edi,txt_zp_sp,2 |
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92 | stdcall str_len,edi |
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93 | add edi,eax |
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94 | sub ecx,eax |
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95 | |||
96 | mov eax,[ebx+offs_vert_zp+offs_zbup_y] |
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97 | stdcall convert_int_to_str,ecx |
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98 | stdcall str_n_cat,edi,txt_zp_sp,2 |
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99 | stdcall str_len,edi |
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100 | add edi,eax |
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101 | sub ecx,eax |
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102 | |||
103 | mov eax,[ebx+offs_vert_zp+offs_zbup_z] |
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104 | stdcall convert_int_to_str,ecx |
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105 | |||
106 | stdcall str_n_cat,edi,txt_nl,2 |
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107 | stdcall dbg_print,f_ttv,buf_param |
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108 | pop edi |
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109 | end if |
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110 | ret |
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111 | endp |
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112 | |||
113 | align 4 |
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114 | proc gl_add_select1 uses eax ebx ecx, context:dword, z1:dword,z2:dword,z3:dword |
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115 | mov eax,[z1] |
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116 | mov ebx,eax |
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117 | cmp [z2],eax |
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118 | jge @f |
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119 | mov eax,[z2] |
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120 | @@: |
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121 | cmp [z3],eax |
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122 | jge @f |
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123 | mov eax,[z3] |
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124 | @@: |
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125 | cmp [z2],ebx |
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126 | jle @f |
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127 | mov ebx,[z2] |
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128 | @@: |
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129 | cmp [z3],ebx |
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130 | jle @f |
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131 | mov ebx,[z3] |
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132 | @@: |
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133 | mov ecx,0xffffffff |
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134 | sub ecx,ebx |
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135 | push ecx |
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136 | mov ecx,0xffffffff |
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137 | sub ecx,eax |
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138 | push ecx |
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139 | stdcall gl_add_select, [context] ;,0xffffffff-eax,0xffffffff-ebx |
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140 | ret |
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141 | endp |
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142 | |||
143 | ; point |
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144 | |||
145 | align 4 |
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146 | proc gl_draw_point uses eax ebx, context:dword, p0:dword |
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147 | mov ebx,[p0] |
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148 | cmp dword[ebx+offs_vert_clip_code],0 ;if (p0.clip_code == 0) |
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149 | jne @f |
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150 | mov eax,[context] |
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151 | cmp dword[eax+offs_cont_render_mode],GL_SELECT |
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152 | jne .els |
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153 | 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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154 | jmp @f |
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155 | .els: |
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156 | add ebx,offs_vert_zp |
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157 | stdcall ZB_plot, dword[eax+offs_cont_zb],ebx |
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158 | @@: |
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159 | ret |
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160 | endp |
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161 | |||
162 | ; line |
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163 | |||
164 | align 4 |
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165 | proc interpolate uses eax ebx ecx, q:dword,p0:dword,p1:dword,t:dword |
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166 | mov eax,[q] |
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167 | mov ebx,[p0] |
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168 | mov ecx,[p1] |
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169 | fld dword[t] |
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170 | |||
171 | ; интерполяция по координатам |
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5175 | IgorA | 172 | fld dword[ecx+offs_vert_pc+offs_X] |
173 | fsub dword[ebx+offs_vert_pc+offs_X] |
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5153 | IgorA | 174 | fmul st0,st1 |
5175 | IgorA | 175 | fadd dword[ebx+offs_vert_pc+offs_X] |
176 | fstp dword[eax+offs_vert_pc+offs_X] |
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5153 | IgorA | 177 | |
5175 | IgorA | 178 | fld dword[ecx+offs_vert_pc+offs_Y] |
179 | fsub dword[ebx+offs_vert_pc+offs_Y] |
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5153 | IgorA | 180 | fmul st0,st1 |
5175 | IgorA | 181 | fadd dword[ebx+offs_vert_pc+offs_Y] |
182 | fstp dword[eax+offs_vert_pc+offs_Y] |
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5153 | IgorA | 183 | |
5175 | IgorA | 184 | fld dword[ecx+offs_vert_pc+offs_Z] |
185 | fsub dword[ebx+offs_vert_pc+offs_Z] |
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5153 | IgorA | 186 | fmul st0,st1 |
5175 | IgorA | 187 | fadd dword[ebx+offs_vert_pc+offs_Z] |
188 | fstp dword[eax+offs_vert_pc+offs_Z] |
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5153 | IgorA | 189 | |
5175 | IgorA | 190 | fld dword[ecx+offs_vert_pc+offs_W] |
191 | fsub dword[ebx+offs_vert_pc+offs_W] |
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5153 | IgorA | 192 | fmul st0,st1 |
5175 | IgorA | 193 | fadd dword[ebx+offs_vert_pc+offs_W] |
194 | fstp dword[eax+offs_vert_pc+offs_W] |
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5153 | IgorA | 195 | |
196 | ; интерполяция по цвету |
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197 | fld dword[ecx+offs_vert_color] |
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198 | fsub dword[ebx+offs_vert_color] |
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199 | fmul st0,st1 |
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200 | fadd dword[ebx+offs_vert_color] |
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201 | fstp dword[eax+offs_vert_color] |
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202 | |||
203 | fld dword[ecx+offs_vert_color+4] |
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204 | fsub dword[ebx+offs_vert_color+4] |
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205 | fmul st0,st1 |
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206 | fadd dword[ebx+offs_vert_color+4] |
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207 | fstp dword[eax+offs_vert_color+4] |
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208 | |||
209 | fld dword[ecx+offs_vert_color+8] |
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210 | fsub dword[ebx+offs_vert_color+8] |
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211 | fmul st0,st1 |
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212 | fadd dword[ebx+offs_vert_color+8] |
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213 | fstp dword[eax+offs_vert_color+8] |
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214 | ret |
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215 | endp |
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216 | |||
217 | ; |
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218 | ; Line Clipping |
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219 | ; |
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220 | |||
221 | ; Line Clipping algorithm from 'Computer Graphics', Principles and |
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222 | ; Practice |
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223 | ; tmin,tmax -> &float |
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224 | align 4 |
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225 | proc ClipLine1 uses ebx, denom:dword,num:dword,tmin:dword,tmax:dword |
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226 | fldz |
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227 | fcom dword[denom] |
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228 | fstsw ax |
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229 | sahf |
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230 | je .u2 |
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231 | jmp @f |
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232 | .u2: |
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233 | fcom dword[num] |
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234 | fstsw ax |
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235 | sahf |
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236 | jb .r0 ;if (denom==0 && num>0) return 0 |
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237 | jmp .r1 |
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238 | @@: |
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239 | |||
240 | fcom dword[denom] |
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241 | fstsw ax |
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242 | sahf |
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243 | ja .els_0 ;if (0 |
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244 | fld dword[num] |
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245 | fdiv dword[denom] |
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246 | |||
247 | mov ebx,[tmax] |
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248 | fcom dword[ebx] |
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249 | fstsw ax |
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250 | sahf |
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251 | ja .r0 ;if (t>*tmax) return 0 |
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252 | |||
253 | mov ebx,[tmin] |
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254 | fcom dword[ebx] |
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255 | fstsw ax |
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256 | sahf |
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257 | jbe .r1 |
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258 | fstp dword[ebx] ;if (t>*tmin) *tmin=t |
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259 | jmp .r1 |
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260 | |||
261 | .els_0: ;else if (0>denom) |
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262 | fld dword[num] |
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263 | fdiv dword[denom] |
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264 | |||
265 | mov ebx,[tmin] |
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266 | fcom dword[ebx] |
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267 | fstsw ax |
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268 | sahf |
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269 | jb .r0 ;if (t<*tmin) return 0 |
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270 | |||
271 | mov ebx,[tmax] |
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272 | fcom dword[ebx] |
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273 | fstsw ax |
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274 | sahf |
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275 | jae .r1 |
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276 | fstp dword[ebx] ;if (t<*tmin) *tmax=t |
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277 | jmp .r1 |
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278 | |||
279 | .r0: ;return 0 |
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280 | xor eax,eax |
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281 | jmp .end_f |
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282 | .r1: ;return 1 |
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283 | xor eax,eax |
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284 | inc eax |
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285 | .end_f: |
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286 | if DEBUG ;ClipLine1 |
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287 | push edi |
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288 | mov ecx,80 |
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289 | lea edi,[buf_param] |
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290 | stdcall convert_int_to_str,ecx |
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291 | |||
292 | stdcall str_n_cat,edi,txt_nl,2 |
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293 | stdcall dbg_print,f_cl1,buf_param |
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294 | pop edi |
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295 | end if |
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296 | ffree st0 ;профилактика для очистки стека |
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297 | fincstp ;как минимум одно значение в стеке уже есть |
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298 | ret |
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299 | endp |
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300 | |||
301 | align 4 |
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302 | proc gl_draw_line uses eax ebx edx edi esi, context:dword, p1:dword, p2:dword |
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303 | locals |
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304 | d_x dd ? |
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305 | d_y dd ? |
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306 | d_z dd ? |
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307 | d_w dd ? |
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308 | x1 dd ? |
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309 | y1 dd ? |
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310 | z1 dd ? |
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311 | w1 dd ? |
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312 | q1 GLVertex ? |
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313 | q2 GLVertex ? |
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314 | tmin dd ? ;ebp-8 |
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315 | tmax dd ? ;ebp-4 |
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316 | endl |
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317 | |||
318 | mov edx,[context] |
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319 | mov edi,[p1] |
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320 | mov esi,[p2] |
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321 | |||
322 | if DEBUG |
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323 | jmp @f |
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324 | f_1 db ' gl_draw_line',0 |
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325 | @@: |
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326 | stdcall dbg_print,f_1,m_1 |
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327 | end if |
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328 | cmp dword[edi+offs_vert_clip_code],0 |
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329 | jne .els_i |
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330 | cmp dword[esi+offs_vert_clip_code],0 |
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331 | jne .els_i |
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332 | ;if ( (p1.clip_code | p2.clip_code) == 0) |
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333 | cmp dword[edx+offs_cont_render_mode],GL_SELECT ;if (context.render_mode == GL_SELECT) |
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334 | jne .els_1 |
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335 | stdcall gl_add_select1, edx,dword[edi+offs_vert_zp+offs_zbup_z],\ |
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336 | dword[esi+offs_vert_zp+offs_zbup_z],dword[esi+offs_vert_zp+offs_zbup_z] |
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337 | jmp .end_f |
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338 | .els_1: |
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339 | add edi,offs_vert_zp |
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340 | add esi,offs_vert_zp |
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341 | push esi |
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342 | push edi |
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343 | push dword[edx+offs_cont_zb] |
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344 | cmp dword[edx+offs_cont_depth_test],0 |
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345 | je .els_2 |
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346 | ;if (context.depth_test) |
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347 | call ZB_line_z ;, dword[edx+offs_cont_zb],edi,esi |
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348 | jmp .end_f |
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349 | .els_2: |
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350 | call ZB_line ;, dword[edx+offs_cont_zb],edi,esi |
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351 | jmp .end_f |
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352 | .els_i: |
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353 | ;else if ( (p1.clip_code & p2.clip_code) != 0 ) |
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354 | mov eax,[edi+offs_vert_clip_code] |
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355 | and eax,[esi+offs_vert_clip_code] |
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356 | cmp eax,0 |
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357 | jne .end_f |
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358 | .els_0: |
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359 | if DEBUG |
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360 | stdcall dbg_print,f_1,m_2 |
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361 | end if |
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362 | |||
363 | finit |
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364 | fld dword[esi+offs_vert_pc+offs_X] |
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365 | fsub dword[edi+offs_vert_pc+offs_X] |
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366 | fstp dword[d_x] ;d_x = p2.pc.X - p1.pc.X |
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367 | fld dword[esi+offs_vert_pc+offs_Y] |
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368 | fsub dword[edi+offs_vert_pc+offs_Y] |
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369 | fstp dword[d_y] ;d_y = p2.pc.Y - p1.pc.Y |
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370 | fld dword[esi+offs_vert_pc+offs_Z] |
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371 | fsub dword[edi+offs_vert_pc+offs_Z] |
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372 | fstp dword[d_z] ;d_z = p2.pc.Z - p1.pc.Z |
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373 | fld dword[esi+offs_vert_pc+offs_W] |
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374 | fsub dword[edi+offs_vert_pc+offs_W] |
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375 | fstp dword[d_w] ;d_w = p2.pc.W - p1.pc.W |
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376 | |||
377 | mov eax,[edi+offs_vert_pc+offs_X] |
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378 | mov [x1],eax ;x1 = p1.pc.X |
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379 | mov eax,[edi+offs_vert_pc+offs_Y] |
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380 | mov [y1],eax ;y1 = p1.pc.Y |
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381 | mov eax,[edi+offs_vert_pc+offs_Z] |
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382 | mov [z1],eax ;z1 = p1.pc.Z |
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383 | mov eax,[edi+offs_vert_pc+offs_W] |
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384 | mov [w1],eax ;w1 = p1.pc.W |
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385 | |||
386 | mov dword[tmin],0.0 |
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387 | mov dword[tmax],1.0 |
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388 | |||
389 | mov eax,ebp |
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390 | sub eax,4 |
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391 | push eax ;толкаем в стек адрес &tmax |
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392 | sub eax,4 |
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393 | push eax ;толкаем в стек адрес &tmin |
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394 | fld dword[x1] |
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395 | fadd dword[w1] |
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396 | fchs |
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397 | fstp dword[esp-4] |
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398 | fld dword[d_x] |
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399 | fadd dword[d_w] |
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400 | fstp dword[esp-8] |
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401 | sub esp,8 |
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402 | call ClipLine1 ;d_x+d_w,-x1-w1,&tmin,&tmax |
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403 | bt eax,0 |
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404 | jnc .end_f |
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405 | |||
406 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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407 | fld dword[x1] |
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408 | fsub dword[w1] |
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409 | fstp dword[esp-4] |
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410 | fld dword[d_w] |
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411 | fsub dword[d_x] |
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412 | fstp dword[esp-8] |
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413 | sub esp,8 |
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414 | call ClipLine1 ;-d_x+d_w,x1-w1,&tmin,&tmax |
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415 | bt eax,0 |
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416 | jnc .end_f |
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417 | |||
418 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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419 | fld dword[y1] |
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420 | fadd dword[w1] |
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421 | fchs |
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422 | fstp dword[esp-4] |
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423 | fld dword[d_y] |
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424 | fadd dword[d_w] |
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425 | fstp dword[esp-8] |
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426 | sub esp,8 |
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427 | call ClipLine1 ;d_y+d_w,-y1-w1,&tmin,&tmax |
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428 | bt eax,0 |
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429 | jnc .end_f |
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430 | |||
431 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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432 | fld dword[y1] |
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433 | fsub dword[w1] |
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434 | fstp dword[esp-4] |
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435 | fld dword[d_w] |
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436 | fsub dword[d_y] |
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437 | fstp dword[esp-8] |
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438 | sub esp,8 |
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439 | call ClipLine1 ;-d_y+d_w,y1-w1,&tmin,&tmax |
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440 | bt eax,0 |
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441 | jnc .end_f |
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442 | |||
443 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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444 | fld dword[z1] |
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445 | fadd dword[w1] |
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446 | fchs |
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447 | fstp dword[esp-4] |
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448 | fld dword[d_z] |
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449 | fadd dword[d_w] |
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450 | fstp dword[esp-8] |
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451 | sub esp,8 |
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452 | call ClipLine1 ;d_z+d_w,-z1-w1,&tmin,&tmax |
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453 | bt eax,0 |
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454 | jnc .end_f |
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455 | |||
456 | sub esp,8 ;толкаем в стек адреса переменных &tmin и &tmax |
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457 | fld dword[z1] |
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458 | fsub dword[w1] |
||
459 | fstp dword[esp-4] |
||
460 | fld dword[d_w] |
||
461 | fsub dword[d_z] |
||
462 | fstp dword[esp-8] |
||
463 | sub esp,8 |
||
464 | call ClipLine1 ;-d_z+d_w,z1-w1,&tmin,&tmax |
||
465 | bt eax,0 |
||
466 | jnc .end_f |
||
467 | |||
468 | mov eax,ebp |
||
469 | sub eax,8+2*sizeof.GLVertex ;eax = &q1 |
||
470 | stdcall interpolate, eax,edi,esi,[tmin] |
||
471 | stdcall gl_transform_to_viewport, edx,eax |
||
472 | add eax,sizeof.GLVertex ;eax = &q2 |
||
473 | stdcall interpolate, eax,edi,esi,[tmax] |
||
474 | stdcall gl_transform_to_viewport, edx,eax |
||
475 | |||
476 | sub eax,sizeof.GLVertex ;eax = &q1 |
||
477 | mov ebx,eax |
||
478 | add ebx,offs_vert_zp+offs_zbup_b |
||
479 | push ebx |
||
480 | add ebx,offs_zbup_g-offs_zbup_b |
||
481 | push ebx |
||
482 | add ebx,offs_zbup_r-offs_zbup_g |
||
483 | push ebx |
||
484 | stdcall RGBFtoRGBI, dword[eax+offs_vert_color],dword[eax+offs_vert_color+4],dword[eax+offs_vert_color+8] |
||
485 | |||
486 | add eax,sizeof.GLVertex ;eax = &q2 |
||
487 | mov ebx,eax |
||
488 | add ebx,offs_vert_zp+offs_zbup_b |
||
489 | push ebx |
||
490 | add ebx,offs_zbup_g-offs_zbup_b |
||
491 | push ebx |
||
492 | add ebx,offs_zbup_r-offs_zbup_g |
||
493 | push ebx |
||
494 | stdcall RGBFtoRGBI, dword[eax+offs_vert_color],dword[eax+offs_vert_color+4],dword[eax+offs_vert_color+8] |
||
495 | |||
496 | add eax,offs_vert_zp ;eax = &q2.zp |
||
497 | push eax |
||
498 | sub eax,sizeof.GLVertex ;eax = &q1.zp |
||
499 | push eax |
||
500 | push dword[edx+offs_cont_zb] |
||
501 | cmp dword[edx+offs_cont_depth_test],0 |
||
502 | je .els_3 |
||
503 | call ZB_line_z ;(context.zb,&q1.zp,&q2.zp) |
||
504 | jmp .end_f |
||
505 | .els_3: |
||
506 | call ZB_line ;(context.zb,&q1.zp,&q2.zp) |
||
507 | .end_f: |
||
508 | ret |
||
509 | endp |
||
510 | |||
511 | ; triangle |
||
512 | |||
513 | ; |
||
514 | ; Clipping |
||
515 | ; |
||
516 | |||
517 | ; We clip the segment [a,b] against the 6 planes of the normal volume. |
||
518 | ; We compute the point 'c' of intersection and the value of the parameter 't' |
||
519 | ; of the intersection if x=a+t(b-a). |
||
520 | ; |
||
521 | ; sign: 0 -> '-', 1 -> '+' |
||
522 | macro clip_func sign,dir,dir1,dir2 |
||
523 | { |
||
524 | locals |
||
525 | t dd ? |
||
526 | d_X dd ? |
||
527 | d_Y dd ? |
||
528 | d_Z dd ? |
||
529 | d_W dd ? |
||
530 | endl |
||
531 | mov edx,[a] |
||
532 | mov ebx,[b] |
||
533 | mov ecx,[c] |
||
5175 | IgorA | 534 | fld dword[ebx+offs_X] |
535 | fsub dword[edx+offs_X] |
||
5153 | IgorA | 536 | fstp dword[d_X] ;d_X = (b.X - a.X) |
5175 | IgorA | 537 | fld dword[ebx+offs_Y] |
538 | fsub dword[edx+offs_Y] |
||
5153 | IgorA | 539 | fstp dword[d_Y] ;d_Y = (b.Y - a.Y) |
5175 | IgorA | 540 | fld dword[ebx+offs_Z] |
541 | fsub dword[edx+offs_Z] |
||
5153 | IgorA | 542 | fstp dword[d_Z] ;d_Z = (b.Z - a.Z) |
5175 | IgorA | 543 | fld dword[ebx+offs_W] |
544 | fsub dword[edx+offs_W] |
||
5153 | IgorA | 545 | fst dword[d_W] ;d_W = (b.W - a.W) |
546 | if sign eq 0 |
||
547 | fadd dword[d#dir] |
||
548 | else |
||
549 | fsub dword[d#dir] |
||
550 | end if |
||
551 | |||
552 | fldz |
||
5175 | IgorA | 553 | fcompp |
5153 | IgorA | 554 | fstsw ax |
555 | sahf |
||
556 | ja @f |
||
557 | fst dword[t] ;t=0 |
||
558 | jmp .e_zero |
||
559 | @@: ;else |
||
560 | fld dword[edx+offs#dir] |
||
561 | if sign eq 0 |
||
562 | fchs |
||
563 | end if |
||
564 | fsub dword[edx+offs_W] |
||
565 | fdiv st0,st1 |
||
566 | fst dword[t] ;t = ( sign a.dir - a.W) / den |
||
567 | .e_zero: |
||
568 | |||
569 | fmul dword[d#dir1] ;st0 = t * d.dir1 |
||
570 | fadd dword[edx+offs#dir1] |
||
571 | fstp dword[ecx+offs#dir1] ;c.dir1 = a.dir1 + t * d.dir1 |
||
572 | |||
573 | fld dword[t] |
||
574 | fmul dword[d#dir2] ;st0 = t * d.dir2 |
||
575 | fadd dword[edx+offs#dir2] |
||
576 | fstp dword[ecx+offs#dir2] ;c.dir2 = a.dir2 + t * d.dir2 |
||
577 | |||
578 | fld dword[t] |
||
579 | fmul dword[d_W] |
||
580 | fadd dword[edx+offs_W] |
||
581 | fst dword[ecx+offs_W] ;c.W = a.W + t * d_W |
||
582 | |||
583 | if sign eq 0 |
||
584 | fchs |
||
585 | end if |
||
586 | fstp dword[ecx+offs#dir] ;c.dir = sign c.W |
||
587 | mov eax,[t] |
||
588 | } |
||
589 | |||
590 | align 4 |
||
591 | proc clip_xmin uses ebx ecx edx, c:dword, a:dword, b:dword |
||
592 | clip_func 0,_X,_Y,_Z |
||
593 | ret |
||
594 | endp |
||
595 | |||
596 | align 4 |
||
597 | proc clip_xmax uses ebx ecx edx, c:dword, a:dword, b:dword |
||
598 | clip_func 1,_X,_Y,_Z |
||
599 | ret |
||
600 | endp |
||
601 | |||
602 | align 4 |
||
603 | proc clip_ymin uses ebx ecx edx, c:dword, a:dword, b:dword |
||
604 | clip_func 0,_Y,_X,_Z |
||
605 | ret |
||
606 | endp |
||
607 | |||
608 | align 4 |
||
609 | proc clip_ymax uses ebx ecx edx, c:dword, a:dword, b:dword |
||
610 | clip_func 1,_Y,_X,_Z |
||
611 | ret |
||
612 | endp |
||
613 | |||
614 | align 4 |
||
615 | proc clip_zmin uses ebx ecx edx, c:dword, a:dword, b:dword |
||
616 | clip_func 0,_Z,_X,_Y |
||
617 | ret |
||
618 | endp |
||
619 | |||
620 | align 4 |
||
621 | proc clip_zmax uses ebx ecx edx, c:dword, a:dword, b:dword |
||
622 | clip_func 1,_Z,_X,_Y |
||
623 | ret |
||
624 | endp |
||
625 | |||
626 | align 4 |
||
627 | clip_proc dd clip_xmin,clip_xmax, clip_ymin,clip_ymax, clip_zmin,clip_zmax |
||
628 | |||
5175 | IgorA | 629 | align 4 |
630 | proc updateTmp uses edx, context:dword, q:dword, p0:dword, p1:dword, t:dword |
||
631 | mov eax,[context] |
||
632 | cmp dword[edx+offs_cont_current_shade_model],GL_SMOOTH ;if (context.current_shade_model == GL_SMOOTH) |
||
633 | jne .els_0 |
||
5153 | IgorA | 634 | ; q->color.v[0]=p0->color.v[0] + (p1->color.v[0]-p0->color.v[0])*t; |
635 | ; q->color.v[1]=p0->color.v[1] + (p1->color.v[1]-p0->color.v[1])*t; |
||
636 | ; q->color.v[2]=p0->color.v[2] + (p1->color.v[2]-p0->color.v[2])*t; |
||
5175 | IgorA | 637 | jmp @f |
638 | .els_0: |
||
5153 | IgorA | 639 | ; q->color.v[0]=p0->color.v[0]; |
640 | ; q->color.v[1]=p0->color.v[1]; |
||
641 | ; q->color.v[2]=p0->color.v[2]; |
||
5175 | IgorA | 642 | @@: |
5153 | IgorA | 643 | |
5175 | IgorA | 644 | cmp dword[edx+offs_cont_texture_2d_enabled],0 ;if (context.texture_2d_enabled) |
645 | je @f |
||
5153 | IgorA | 646 | ; q->tex_coord.X=p0->tex_coord.X + (p1->tex_coord.X-p0->tex_coord.X)*t; |
647 | ; q->tex_coord.Y=p0->tex_coord.Y + (p1->tex_coord.Y-p0->tex_coord.Y)*t; |
||
5175 | IgorA | 648 | @@: |
5153 | IgorA | 649 | |
650 | ; q->clip_code=gl_clipcode(q->pc.X,q->pc.Y,q->pc.Z,q->pc.W); |
||
651 | ; if (q->clip_code==0){ |
||
652 | ; gl_transform_to_viewport(c,q); |
||
653 | ; RGBFtoRGBI(q->color.v[0],q->color.v[1],q->color.v[2],q->zp.r,q->zp.g,q->zp.b); |
||
654 | ; } |
||
5175 | IgorA | 655 | ret |
656 | endp |
||
5153 | IgorA | 657 | |
5175 | IgorA | 658 | align 4 |
659 | proc gl_draw_triangle, context:dword, p0:dword, p1:dword, p2:dword |
||
660 | locals |
||
661 | cc rd 3 |
||
662 | front dd ? |
||
663 | norm dd ? ;float |
||
664 | endl |
||
665 | pushad |
||
666 | mov ebx,[p0] |
||
667 | mov ecx,[p1] |
||
668 | mov edx,[p2] |
||
669 | |||
670 | mov edi,[ebx+offs_vert_clip_code] |
||
671 | mov dword[cc],edi |
||
672 | mov eax,[ecx+offs_vert_clip_code] |
||
673 | mov dword[cc+4],eax |
||
674 | or edi,eax |
||
675 | mov eax,[edx+offs_vert_clip_code] |
||
676 | mov dword[cc+8],eax |
||
677 | or edi,eax |
||
5153 | IgorA | 678 | |
5175 | IgorA | 679 | ; we handle the non clipped case here to go faster |
680 | cmp edi,0 |
||
681 | jne .els_0 |
||
682 | mov edi,dword[edx+offs_vert_zp+offs_zbup_x] |
||
683 | mov edi,dword[ebx+offs_vert_zp+offs_zbup_x] |
||
684 | mov dword[norm],edi |
||
685 | fild dword[norm] |
||
686 | mov esi,dword[ecx+offs_vert_zp+offs_zbup_y] |
||
687 | mov esi,dword[ebx+offs_vert_zp+offs_zbup_y] |
||
688 | mov dword[norm],edi |
||
689 | fimul dword[norm] |
||
690 | mov edi,dword[ecx+offs_vert_zp+offs_zbup_x] |
||
691 | sub edi,dword[ebx+offs_vert_zp+offs_zbup_x] |
||
692 | mov dword[norm],edi |
||
693 | fild dword[norm] |
||
694 | mov edi,dword[edx+offs_vert_zp+offs_zbup_y] |
||
695 | mov edi,dword[ebx+offs_vert_zp+offs_zbup_y] |
||
696 | mov dword[norm],edi |
||
697 | fimul dword[norm] |
||
698 | fsub st0,st1 |
||
5153 | IgorA | 699 | |
5175 | IgorA | 700 | ;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 | 701 | |
5175 | IgorA | 702 | mov dword[front],0 |
703 | fldz |
||
704 | fcom st1 |
||
705 | fstsw ax |
||
706 | sahf |
||
707 | je .end_f |
||
708 | jb @f |
||
709 | inc dword[front] ;front = 0.0 > norm |
||
710 | @@: |
||
711 | mov edi,[context] |
||
712 | mov eax,dword[edi+offs_cont_current_front_face] |
||
713 | xor dword[front],eax ;front ^= context.current_front_face |
||
5153 | IgorA | 714 | |
5175 | IgorA | 715 | ; back face culling |
716 | cmp dword[edi+offs_cont_cull_face_enabled],0 |
||
717 | je .els_1 |
||
718 | ; most used case first |
||
719 | cmp dword[edi+offs_cont_current_cull_face],GL_BACK |
||
720 | jne @f |
||
721 | cmp dword[front],0 |
||
722 | je .end_f |
||
723 | stdcall dword[edi+offs_cont_draw_triangle_front], edi,ebx,ecx,edx |
||
724 | jmp .end_f |
||
725 | @@: |
||
726 | cmp dword[edi+offs_cont_current_cull_face],GL_FRONT |
||
727 | jne .end_f |
||
728 | cmp dword[front],0 |
||
729 | jne .end_f |
||
730 | stdcall dword[edi+offs_cont_draw_triangle_back], edi,ebx,ecx,edx |
||
731 | jmp .end_f |
||
732 | .els_1: |
||
733 | ; no culling |
||
734 | cmp dword[front],0 |
||
735 | je @f |
||
736 | stdcall dword[edi+offs_cont_draw_triangle_front], edi,ebx,ecx,edx |
||
737 | @@: |
||
738 | stdcall dword[edi+offs_cont_draw_triangle_back], edi,ebx,ecx,edx |
||
739 | jmp .end_f |
||
740 | .els_0: |
||
741 | and eax,[cc] |
||
742 | and eax,[cc+4] |
||
743 | cmp eax,0 |
||
744 | jne @f |
||
745 | stdcall gl_draw_triangle_clip, [context],ebx,ecx,edx,0 |
||
746 | .end_f: |
||
747 | finit |
||
748 | @@: |
||
749 | popad |
||
750 | ret |
||
751 | endp |
||
5153 | IgorA | 752 | |
5175 | IgorA | 753 | align 4 |
754 | proc gl_draw_triangle_clip, context:dword, p0:dword, p1:dword, p2:dword, clip_bit:dword |
||
755 | locals |
||
756 | co dd ? |
||
757 | co1 dd ? |
||
758 | cc rd 3 |
||
759 | edge_flag_tmp dd ? |
||
760 | clip_mask dd ? |
||
761 | tmp1 GLVertex ? |
||
762 | tmp2 GLVertex ? |
||
763 | q rd 3 ;GLVertex* |
||
764 | tt dd ? ;float |
||
765 | endl |
||
766 | pushad |
||
767 | |||
768 | mov ebx,[p0] |
||
769 | mov ecx,[p1] |
||
770 | mov edx,[p2] |
||
771 | |||
772 | mov edi,[ebx+offs_vert_clip_code] |
||
773 | mov dword[cc],edi |
||
774 | mov eax,[ecx+offs_vert_clip_code] |
||
775 | mov dword[cc+4],eax |
||
776 | or edi,eax |
||
777 | mov eax,[edx+offs_vert_clip_code] |
||
778 | mov dword[cc+8],eax |
||
779 | or edi,eax |
||
780 | mov dword[co],edi |
||
781 | |||
782 | cmp edi,0 |
||
783 | jne .els_0 |
||
784 | stdcall gl_draw_triangle, [context],ebx,ecx,edx |
||
785 | jmp .end_f |
||
786 | .els_0: |
||
787 | and eax,[cc] |
||
788 | and eax,[cc+4] |
||
789 | |||
790 | ; the triangle is completely outside |
||
791 | cmp eax,0 |
||
792 | jne .end_f |
||
793 | |||
794 | ; find the next direction to clip |
||
5153 | IgorA | 795 | ; while (clip_bit < 6 && (co & (1 << clip_bit)) == 0) { |
796 | ; clip_bit++; |
||
797 | ; } |
||
798 | |||
5175 | IgorA | 799 | ; this test can be true only in case of rounding errors |
800 | cmp dword[clip_bit],6 |
||
801 | if 0 |
||
802 | jne @f |
||
5153 | IgorA | 803 | ; printf("Error:\n"); |
804 | ; printf("%f %f %f %f\n",p0->pc.X,p0->pc.Y,p0->pc.Z,p0->pc.W); |
||
805 | ; printf("%f %f %f %f\n",p1->pc.X,p1->pc.Y,p1->pc.Z,p1->pc.W); |
||
806 | ; printf("%f %f %f %f\n",p2->pc.X,p2->pc.Y,p2->pc.Z,p2->pc.W); |
||
5175 | IgorA | 807 | jmp .end_f |
808 | @@: |
||
809 | else |
||
810 | je .end_f |
||
811 | end if |
||
5153 | IgorA | 812 | |
813 | ; clip_mask = 1 << clip_bit; |
||
814 | ; co1=(cc[0] ^ cc[1] ^ cc[2]) & clip_mask; |
||
815 | |||
816 | ; if (co1) { |
||
817 | ; /* one point outside */ |
||
818 | |||
819 | ; if (cc[0] & clip_mask) { q[0]=p0; q[1]=p1; q[2]=p2; } |
||
820 | ; else if (cc[1] & clip_mask) { q[0]=p1; q[1]=p2; q[2]=p0; } |
||
821 | ; else { q[0]=p2; q[1]=p0; q[2]=p1; } |
||
822 | ; |
||
823 | ; tt=clip_proc[clip_bit](&tmp1.pc,&q[0]->pc,&q[1]->pc); |
||
824 | ; updateTmp(c,&tmp1,q[0],q[1],tt); |
||
825 | ; |
||
826 | ; tt=clip_proc[clip_bit](&tmp2.pc,&q[0]->pc,&q[2]->pc); |
||
827 | ; updateTmp(c,&tmp2,q[0],q[2],tt); |
||
828 | ; |
||
829 | ; tmp1.edge_flag=q[0]->edge_flag; |
||
830 | ; edge_flag_tmp=q[2]->edge_flag; |
||
831 | ; q[2]->edge_flag=0; |
||
832 | ; gl_draw_triangle_clip(c,&tmp1,q[1],q[2],clip_bit+1); |
||
833 | ; |
||
834 | ; tmp2.edge_flag=0; |
||
835 | ; tmp1.edge_flag=0; |
||
836 | ; q[2]->edge_flag=edge_flag_tmp; |
||
837 | ; gl_draw_triangle_clip(c,&tmp2,&tmp1,q[2],clip_bit+1); |
||
838 | ; } else { |
||
839 | ; /* two points outside */ |
||
840 | |||
841 | ; if ((cc[0] & clip_mask)==0) { q[0]=p0; q[1]=p1; q[2]=p2; } |
||
842 | ; else if ((cc[1] & clip_mask)==0) { q[0]=p1; q[1]=p2; q[2]=p0; } |
||
843 | ; else { q[0]=p2; q[1]=p0; q[2]=p1; } |
||
844 | |||
845 | ; tt=clip_proc[clip_bit](&tmp1.pc,&q[0]->pc,&q[1]->pc); |
||
846 | ; updateTmp(c,&tmp1,q[0],q[1],tt); |
||
847 | |||
848 | ; tt=clip_proc[clip_bit](&tmp2.pc,&q[0]->pc,&q[2]->pc); |
||
849 | ; updateTmp(c,&tmp2,q[0],q[2],tt); |
||
850 | |||
851 | ; tmp1.edge_flag=1; |
||
852 | ; tmp2.edge_flag=q[2]->edge_flag; |
||
853 | ; gl_draw_triangle_clip(c,q[0],&tmp1,&tmp2,clip_bit+1); |
||
854 | ; } |
||
855 | ; } |
||
5175 | IgorA | 856 | .end_f: |
857 | popad |
||
858 | ret |
||
859 | endp |
||
5153 | IgorA | 860 | |
861 | align 4 |
||
862 | proc gl_draw_triangle_select uses eax, context:dword, p0:dword,p1:dword,p2:dword |
||
863 | mov eax,[p2] |
||
864 | push dword[eax+offs_vert_zp+offs_Z] |
||
865 | mov eax,[p1] |
||
866 | push dword[eax+offs_vert_zp+offs_Z] |
||
867 | mov eax,[p0] |
||
868 | push dword[eax+offs_vert_zp+offs_Z] |
||
869 | stdcall gl_add_select1, [context] ;,p0.zp.z, p1.zp.z, p2.zp.z |
||
870 | ret |
||
871 | endp |
||
872 | |||
5175 | IgorA | 873 | if PROFILE eq 1 |
874 | count_triangles dd ? |
||
875 | count_triangles_textured dd ? |
||
876 | count_pixels dd ? |
||
877 | end if |
||
5153 | IgorA | 878 | |
879 | align 4 |
||
5175 | IgorA | 880 | proc gl_draw_triangle_fill, context:dword, p0:dword,p1:dword,p2:dword |
881 | pushad |
||
882 | if PROFILE eq 1 |
||
5153 | IgorA | 883 | ; int norm; |
884 | ; assert(p0->zp.x >= 0 && p0->zp.x < c->zb->xsize); |
||
885 | ; assert(p0->zp.y >= 0 && p0->zp.y < c->zb->ysize); |
||
886 | ; assert(p1->zp.x >= 0 && p1->zp.x < c->zb->xsize); |
||
887 | ; assert(p1->zp.y >= 0 && p1->zp.y < c->zb->ysize); |
||
888 | ; assert(p2->zp.x >= 0 && p2->zp.x < c->zb->xsize); |
||
889 | ; assert(p2->zp.y >= 0 && p2->zp.y < c->zb->ysize); |
||
890 | |||
891 | ; norm=(p1->zp.x-p0->zp.x)*(p2->zp.y-p0->zp.y)- |
||
892 | ; (p2->zp.x-p0->zp.x)*(p1->zp.y-p0->zp.y); |
||
893 | ; count_pixels+=abs(norm)/2; |
||
5175 | IgorA | 894 | inc dword[count_triangles] |
895 | end if |
||
5153 | IgorA | 896 | |
5175 | IgorA | 897 | mov ebx,[p1] |
898 | add ebx,offs_vert_zp |
||
899 | mov ecx,[p2] |
||
900 | add ecx,offs_vert_zp |
||
5153 | IgorA | 901 | mov edx,[context] |
902 | cmp dword[edx+offs_cont_texture_2d_enabled],0 |
||
903 | je .els_i |
||
904 | ;if (context.texture_2d_enabled) |
||
5175 | IgorA | 905 | if PROFILE eq 1 |
906 | inc dword[count_triangles_textured] |
||
907 | end if |
||
5153 | IgorA | 908 | mov eax,dword[edx+offs_cont_current_texture] |
909 | mov eax,[eax] ;переход по указателю |
||
910 | ;так как offs_text_images+offs_imag_pixmap = 0 то context.current_texture.images[0].pixmap = [eax] |
||
911 | stdcall ZB_setTexture, dword[edx+offs_cont_zb],dword[eax] |
||
5175 | IgorA | 912 | mov eax,[p0] |
913 | add eax,offs_vert_zp |
||
914 | stdcall ZB_fillTriangleMappingPerspective, dword[edx+offs_cont_zb],eax,ebx,ecx |
||
5153 | IgorA | 915 | jmp .end_f |
916 | .els_i: |
||
5175 | IgorA | 917 | mov eax,[p0] |
918 | add eax,offs_vert_zp |
||
919 | cmp dword[edx+offs_cont_current_shade_model],GL_SMOOTH |
||
920 | jne .els |
||
921 | ;else if (context.current_shade_model == GL_SMOOTH) |
||
922 | stdcall ZB_fillTriangleSmooth, dword[edx+offs_cont_zb],eax,ebx,ecx |
||
923 | jmp .end_f |
||
924 | .els: |
||
925 | stdcall ZB_fillTriangleFlat, dword[edx+offs_cont_zb],eax,ebx,ecx |
||
5153 | IgorA | 926 | .end_f: |
5175 | IgorA | 927 | popad |
5153 | IgorA | 928 | ret |
929 | endp |
||
930 | |||
931 | ; Render a clipped triangle in line mode |
||
932 | |||
933 | align 4 |
||
934 | proc gl_draw_triangle_line uses eax ebx ecx edx, context:dword, p0:dword,p1:dword,p2:dword |
||
935 | mov edx,[context] |
||
936 | cmp dword[edx+offs_cont_depth_test],0 |
||
937 | je .els |
||
938 | lea ecx,[ZB_line_z] |
||
939 | jmp @f |
||
940 | .els: |
||
941 | lea ecx,[ZB_line] |
||
942 | @@: |
||
943 | |||
944 | ;if (p0.edge_flag) ZB_line_z(context.zb,&p0.zp,&p1.zp) |
||
945 | mov eax,[p0] |
||
946 | cmp dword[eax+offs_vert_edge_flag],0 |
||
947 | je @f |
||
948 | mov ebx,eax |
||
949 | add ebx,offs_vert_zp |
||
950 | mov eax,[p1] |
||
951 | add eax,offs_vert_zp |
||
952 | stdcall ecx,dword[edx+offs_cont_zb],ebx,eax |
||
953 | @@: |
||
954 | ;if (p1.edge_flag) ZB_line_z(context.zb,&p1.zp,&p2.zp) |
||
955 | mov eax,[p1] |
||
956 | cmp dword[eax+offs_vert_edge_flag],0 |
||
957 | je @f |
||
958 | mov ebx,eax |
||
959 | add ebx,offs_vert_zp |
||
960 | mov eax,[p2] |
||
961 | add eax,offs_vert_zp |
||
962 | stdcall ecx,dword[edx+offs_cont_zb],ebx,eax |
||
963 | @@: |
||
964 | ;if (p2.edge_flag) ZB_line_z(context.zb,&p2.zp,&p0.zp); |
||
965 | mov eax,[p2] |
||
966 | cmp dword[eax+offs_vert_edge_flag],0 |
||
967 | je @f |
||
968 | mov ebx,eax |
||
969 | add ebx,offs_vert_zp |
||
970 | mov eax,[p0] |
||
971 | add eax,offs_vert_zp |
||
972 | stdcall ecx,dword[edx+offs_cont_zb],ebx,eax |
||
973 | @@: |
||
974 | |||
975 | ret |
||
976 | endp |
||
977 | |||
978 | ; Render a clipped triangle in point mode |
||
979 | align 4 |
||
980 | proc gl_draw_triangle_point uses eax ebx edx, context:dword, p0:dword,p1:dword,p2:dword |
||
981 | mov edx,[context] |
||
982 | mov eax,[p0] |
||
983 | cmp dword[eax+offs_vert_edge_flag],0 |
||
984 | je @f |
||
985 | mov ebx,eax |
||
986 | add ebx,offs_vert_zp |
||
987 | stdcall ZB_plot,dword[edx+offs_cont_zb],ebx |
||
988 | @@: |
||
989 | add eax,[p1] |
||
990 | cmp dword[eax+offs_vert_edge_flag],0 |
||
991 | je @f |
||
992 | mov ebx,eax |
||
993 | add ebx,offs_vert_zp |
||
994 | stdcall ZB_plot,dword[edx+offs_cont_zb],ebx |
||
995 | @@: |
||
996 | add eax,[p2] |
||
997 | cmp dword[eax+offs_vert_edge_flag],0 |
||
998 | je @f |
||
999 | mov ebx,eax |
||
1000 | add ebx,offs_vert_zp |
||
1001 | stdcall ZB_plot,dword[edx+offs_cont_zb],ebx |
||
1002 | @@: |
||
1003 | ret |
||
1004 | endp>>>>>>><>><>>*tmin)>*tmin)> |
||
1005 | |||
1006 | |||
1007 | |||
1008 |