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1901 | serge | 1 | /* |
2 | * Mesa 3-D graphics library |
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3 | * Version: 6.5 |
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4 | * |
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5 | * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. |
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6 | * |
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7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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8 | * copy of this software and associated documentation files (the "Software"), |
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9 | * to deal in the Software without restriction, including without limitation |
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10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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11 | * and/or sell copies of the Software, and to permit persons to whom the |
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12 | * Software is furnished to do so, subject to the following conditions: |
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13 | * |
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14 | * The above copyright notice and this permission notice shall be included |
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15 | * in all copies or substantial portions of the Software. |
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16 | * |
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17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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20 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
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21 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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23 | * |
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24 | * Authors: |
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25 | * Keith Whitwell |
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26 | */ |
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27 | |||
28 | |||
29 | #ifndef POSTFIX |
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30 | #define POSTFIX |
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31 | #endif |
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32 | |||
33 | #ifndef INIT |
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34 | #define INIT(x) |
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35 | #endif |
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36 | |||
37 | #ifndef NEED_EDGEFLAG_SETUP |
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38 | #define NEED_EDGEFLAG_SETUP 0 |
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39 | #define EDGEFLAG_GET(a) 0 |
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40 | #define EDGEFLAG_SET(a,b) (void)b |
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41 | #endif |
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42 | |||
43 | #ifndef RESET_STIPPLE |
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44 | #define RESET_STIPPLE |
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45 | #endif |
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46 | |||
47 | #ifndef TEST_PRIM_END |
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48 | #define TEST_PRIM_END(prim) (flags & PRIM_END) |
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49 | #define TEST_PRIM_BEGIN(prim) (flags & PRIM_BEGIN) |
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50 | #endif |
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51 | |||
52 | #ifndef ELT |
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53 | #define ELT(x) x |
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54 | #endif |
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55 | |||
56 | #ifndef RENDER_TAB_QUALIFIER |
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57 | #define RENDER_TAB_QUALIFIER static |
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58 | #endif |
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59 | |||
60 | static void TAG(render_points)( struct gl_context *ctx, |
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61 | GLuint start, |
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62 | GLuint count, |
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63 | GLuint flags ) |
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64 | { |
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65 | LOCAL_VARS; |
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66 | (void) flags; |
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67 | |||
68 | INIT(GL_POINTS); |
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69 | RENDER_POINTS( start, count ); |
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70 | POSTFIX; |
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71 | } |
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72 | |||
73 | static void TAG(render_lines)( struct gl_context *ctx, |
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74 | GLuint start, |
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75 | GLuint count, |
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76 | GLuint flags ) |
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77 | { |
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78 | GLuint j; |
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79 | LOCAL_VARS; |
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80 | (void) flags; |
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81 | |||
82 | INIT(GL_LINES); |
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83 | for (j=start+1; j |
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84 | RESET_STIPPLE; |
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85 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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86 | RENDER_LINE( ELT(j-1), ELT(j) ); |
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87 | else |
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88 | RENDER_LINE( ELT(j), ELT(j-1) ); |
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89 | } |
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90 | POSTFIX; |
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91 | } |
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92 | |||
93 | |||
94 | static void TAG(render_line_strip)( struct gl_context *ctx, |
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95 | GLuint start, |
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96 | GLuint count, |
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97 | GLuint flags ) |
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98 | { |
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99 | GLuint j; |
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100 | LOCAL_VARS; |
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101 | (void) flags; |
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102 | |||
103 | INIT(GL_LINE_STRIP); |
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104 | |||
105 | if (TEST_PRIM_BEGIN(flags)) { |
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106 | RESET_STIPPLE; |
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107 | } |
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108 | |||
109 | for (j=start+1; j |
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110 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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111 | RENDER_LINE( ELT(j-1), ELT(j) ); |
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112 | else |
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113 | RENDER_LINE( ELT(j), ELT(j-1) ); |
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114 | } |
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115 | POSTFIX; |
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116 | } |
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117 | |||
118 | |||
119 | static void TAG(render_line_loop)( struct gl_context *ctx, |
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120 | GLuint start, |
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121 | GLuint count, |
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122 | GLuint flags ) |
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123 | { |
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124 | GLuint i; |
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125 | LOCAL_VARS; |
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126 | |||
127 | (void) flags; |
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128 | |||
129 | INIT(GL_LINE_LOOP); |
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130 | |||
131 | if (start+1 < count) { |
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132 | if (TEST_PRIM_BEGIN(flags)) { |
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133 | RESET_STIPPLE; |
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134 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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135 | RENDER_LINE( ELT(start), ELT(start+1) ); |
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136 | else |
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137 | RENDER_LINE( ELT(start+1), ELT(start) ); |
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138 | } |
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139 | |||
140 | for ( i = start+2 ; i < count ; i++) { |
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141 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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142 | RENDER_LINE( ELT(i-1), ELT(i) ); |
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143 | else |
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144 | RENDER_LINE( ELT(i), ELT(i-1) ); |
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145 | } |
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146 | |||
147 | if ( TEST_PRIM_END(flags)) { |
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148 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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149 | RENDER_LINE( ELT(count-1), ELT(start) ); |
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150 | else |
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151 | RENDER_LINE( ELT(start), ELT(count-1) ); |
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152 | } |
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153 | } |
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154 | |||
155 | POSTFIX; |
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156 | } |
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157 | |||
158 | |||
159 | static void TAG(render_triangles)( struct gl_context *ctx, |
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160 | GLuint start, |
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161 | GLuint count, |
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162 | GLuint flags ) |
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163 | { |
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164 | GLuint j; |
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165 | LOCAL_VARS; |
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166 | (void) flags; |
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167 | |||
168 | INIT(GL_TRIANGLES); |
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169 | if (NEED_EDGEFLAG_SETUP) { |
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170 | for (j=start+2; j |
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171 | /* Leave the edgeflags as supplied by the user. |
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172 | */ |
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173 | RESET_STIPPLE; |
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174 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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175 | RENDER_TRI( ELT(j-2), ELT(j-1), ELT(j) ); |
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176 | else |
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177 | RENDER_TRI( ELT(j-1), ELT(j), ELT(j-2) ); |
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178 | } |
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179 | } else { |
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180 | for (j=start+2; j |
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181 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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182 | RENDER_TRI( ELT(j-2), ELT(j-1), ELT(j) ); |
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183 | else |
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184 | RENDER_TRI( ELT(j-1), ELT(j), ELT(j-2) ); |
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185 | } |
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186 | } |
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187 | POSTFIX; |
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188 | } |
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189 | |||
190 | |||
191 | |||
192 | static void TAG(render_tri_strip)( struct gl_context *ctx, |
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193 | GLuint start, |
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194 | GLuint count, |
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195 | GLuint flags ) |
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196 | { |
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197 | GLuint j; |
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198 | GLuint parity = 0; |
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199 | LOCAL_VARS; |
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200 | |||
201 | INIT(GL_TRIANGLE_STRIP); |
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202 | if (NEED_EDGEFLAG_SETUP) { |
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203 | for (j=start+2;j |
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204 | GLuint ej2, ej1, ej; |
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205 | GLboolean ef2, ef1, ef; |
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206 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) { |
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207 | ej2 = ELT(j-2+parity); |
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208 | ej1 = ELT(j-1-parity); |
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209 | ej = ELT(j); |
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210 | } |
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211 | else { |
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212 | ej2 = ELT(j-1+parity); |
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213 | ej1 = ELT(j-parity); |
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214 | ej = ELT(j-2); |
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215 | } |
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216 | ef2 = EDGEFLAG_GET( ej2 ); |
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217 | ef1 = EDGEFLAG_GET( ej1 ); |
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218 | ef = EDGEFLAG_GET( ej ); |
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219 | if (TEST_PRIM_BEGIN(flags)) { |
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220 | RESET_STIPPLE; |
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221 | } |
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222 | EDGEFLAG_SET( ej2, GL_TRUE ); |
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223 | EDGEFLAG_SET( ej1, GL_TRUE ); |
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224 | EDGEFLAG_SET( ej, GL_TRUE ); |
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225 | RENDER_TRI( ej2, ej1, ej ); |
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226 | EDGEFLAG_SET( ej2, ef2 ); |
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227 | EDGEFLAG_SET( ej1, ef1 ); |
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228 | EDGEFLAG_SET( ej, ef ); |
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229 | } |
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230 | } else { |
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231 | for (j=start+2; j |
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232 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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233 | RENDER_TRI( ELT(j-2+parity), ELT(j-1-parity), ELT(j) ); |
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234 | else |
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235 | RENDER_TRI( ELT(j-1+parity), ELT(j-parity), ELT(j-2) ); |
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236 | } |
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237 | } |
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238 | POSTFIX; |
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239 | } |
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240 | |||
241 | |||
242 | static void TAG(render_tri_fan)( struct gl_context *ctx, |
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243 | GLuint start, |
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244 | GLuint count, |
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245 | GLuint flags ) |
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246 | { |
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247 | GLuint j; |
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248 | LOCAL_VARS; |
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249 | (void) flags; |
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250 | |||
251 | INIT(GL_TRIANGLE_FAN); |
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252 | if (NEED_EDGEFLAG_SETUP) { |
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253 | for (j=start+2;j |
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254 | /* For trifans, all edges are boundary. |
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255 | */ |
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256 | GLuint ejs = ELT(start); |
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257 | GLuint ej1 = ELT(j-1); |
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258 | GLuint ej = ELT(j); |
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259 | GLboolean efs = EDGEFLAG_GET( ejs ); |
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260 | GLboolean ef1 = EDGEFLAG_GET( ej1 ); |
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261 | GLboolean ef = EDGEFLAG_GET( ej ); |
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262 | if (TEST_PRIM_BEGIN(flags)) { |
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263 | RESET_STIPPLE; |
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264 | } |
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265 | EDGEFLAG_SET( ejs, GL_TRUE ); |
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266 | EDGEFLAG_SET( ej1, GL_TRUE ); |
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267 | EDGEFLAG_SET( ej, GL_TRUE ); |
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268 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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269 | RENDER_TRI( ejs, ej1, ej); |
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270 | else |
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271 | RENDER_TRI( ej, ejs, ej1); |
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272 | EDGEFLAG_SET( ejs, efs ); |
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273 | EDGEFLAG_SET( ej1, ef1 ); |
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274 | EDGEFLAG_SET( ej, ef ); |
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275 | } |
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276 | } else { |
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277 | for (j=start+2;j |
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278 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT) |
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279 | RENDER_TRI( ELT(start), ELT(j-1), ELT(j) ); |
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280 | else |
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281 | RENDER_TRI( ELT(j), ELT(start), ELT(j-1) ); |
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282 | } |
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283 | } |
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284 | |||
285 | POSTFIX; |
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286 | } |
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287 | |||
288 | |||
289 | static void TAG(render_poly)( struct gl_context *ctx, |
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290 | GLuint start, |
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291 | GLuint count, |
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292 | GLuint flags ) |
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293 | { |
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294 | GLuint j = start+2; |
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295 | LOCAL_VARS; |
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296 | (void) flags; |
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297 | |||
298 | INIT(GL_POLYGON); |
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299 | if (NEED_EDGEFLAG_SETUP) { |
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300 | GLboolean efstart = EDGEFLAG_GET( ELT(start) ); |
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301 | GLboolean efcount = EDGEFLAG_GET( ELT(count-1) ); |
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302 | |||
303 | /* If the primitive does not begin here, the first edge |
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304 | * is non-boundary. |
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305 | */ |
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306 | if (!TEST_PRIM_BEGIN(flags)) |
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307 | EDGEFLAG_SET( ELT(start), GL_FALSE ); |
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308 | else { |
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309 | RESET_STIPPLE; |
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310 | } |
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311 | |||
312 | /* If the primitive does not end here, the final edge is |
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313 | * non-boundary. |
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314 | */ |
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315 | if (!TEST_PRIM_END(flags)) |
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316 | EDGEFLAG_SET( ELT(count-1), GL_FALSE ); |
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317 | |||
318 | /* Draw the first triangles (possibly zero) |
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319 | */ |
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320 | if (j+1 |
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321 | GLboolean ef = EDGEFLAG_GET( ELT(j) ); |
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322 | EDGEFLAG_SET( ELT(j), GL_FALSE ); |
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323 | RENDER_TRI( ELT(j-1), ELT(j), ELT(start) ); |
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324 | EDGEFLAG_SET( ELT(j), ef ); |
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325 | j++; |
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326 | |||
327 | /* Don't render the first edge again: |
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328 | */ |
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329 | EDGEFLAG_SET( ELT(start), GL_FALSE ); |
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330 | |||
331 | for (;j+1 |
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332 | GLboolean efj = EDGEFLAG_GET( ELT(j) ); |
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333 | EDGEFLAG_SET( ELT(j), GL_FALSE ); |
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334 | RENDER_TRI( ELT(j-1), ELT(j), ELT(start) ); |
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335 | EDGEFLAG_SET( ELT(j), efj ); |
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336 | } |
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337 | } |
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338 | |||
339 | /* Draw the last or only triangle |
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340 | */ |
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341 | if (j < count) |
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342 | RENDER_TRI( ELT(j-1), ELT(j), ELT(start) ); |
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343 | |||
344 | /* Restore the first and last edgeflags: |
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345 | */ |
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346 | EDGEFLAG_SET( ELT(count-1), efcount ); |
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347 | EDGEFLAG_SET( ELT(start), efstart ); |
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348 | |||
349 | } |
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350 | else { |
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351 | for (j=start+2;j |
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352 | RENDER_TRI( ELT(j-1), ELT(j), ELT(start) ); |
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353 | } |
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354 | } |
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355 | POSTFIX; |
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356 | } |
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357 | |||
358 | static void TAG(render_quads)( struct gl_context *ctx, |
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359 | GLuint start, |
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360 | GLuint count, |
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361 | GLuint flags ) |
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362 | { |
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363 | GLuint j; |
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364 | LOCAL_VARS; |
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365 | (void) flags; |
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366 | |||
367 | INIT(GL_QUADS); |
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368 | if (NEED_EDGEFLAG_SETUP) { |
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369 | for (j=start+3; j |
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370 | /* Use user-specified edgeflags for quads. |
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371 | */ |
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372 | RESET_STIPPLE; |
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373 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT || |
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374 | !ctx->Const.QuadsFollowProvokingVertexConvention) |
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375 | RENDER_QUAD( ELT(j-3), ELT(j-2), ELT(j-1), ELT(j) ); |
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376 | else |
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377 | RENDER_QUAD( ELT(j-2), ELT(j-1), ELT(j), ELT(j-3) ); |
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378 | } |
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379 | } else { |
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380 | for (j=start+3; j |
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381 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT || |
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382 | !ctx->Const.QuadsFollowProvokingVertexConvention) |
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383 | RENDER_QUAD( ELT(j-3), ELT(j-2), ELT(j-1), ELT(j) ); |
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384 | else |
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385 | RENDER_QUAD( ELT(j-2), ELT(j-1), ELT(j), ELT(j-3) ); |
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386 | } |
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387 | } |
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388 | POSTFIX; |
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389 | } |
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390 | |||
391 | static void TAG(render_quad_strip)( struct gl_context *ctx, |
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392 | GLuint start, |
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393 | GLuint count, |
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394 | GLuint flags ) |
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395 | { |
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396 | GLuint j; |
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397 | LOCAL_VARS; |
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398 | (void) flags; |
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399 | |||
400 | INIT(GL_QUAD_STRIP); |
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401 | if (NEED_EDGEFLAG_SETUP) { |
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402 | for (j=start+3;j |
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403 | /* All edges are boundary. Set edgeflags to 1, draw the |
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404 | * quad, and restore them to the original values. |
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405 | */ |
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406 | GLboolean ef3 = EDGEFLAG_GET( ELT(j-3) ); |
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407 | GLboolean ef2 = EDGEFLAG_GET( ELT(j-2) ); |
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408 | GLboolean ef1 = EDGEFLAG_GET( ELT(j-1) ); |
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409 | GLboolean ef = EDGEFLAG_GET( ELT(j) ); |
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410 | if (TEST_PRIM_BEGIN(flags)) { |
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411 | RESET_STIPPLE; |
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412 | } |
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413 | EDGEFLAG_SET( ELT(j-3), GL_TRUE ); |
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414 | EDGEFLAG_SET( ELT(j-2), GL_TRUE ); |
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415 | EDGEFLAG_SET( ELT(j-1), GL_TRUE ); |
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416 | EDGEFLAG_SET( ELT(j), GL_TRUE ); |
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417 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT || |
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418 | !ctx->Const.QuadsFollowProvokingVertexConvention) |
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419 | RENDER_QUAD( ELT(j-1), ELT(j-3), ELT(j-2), ELT(j) ); |
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420 | else |
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421 | RENDER_QUAD( ELT(j-2), ELT(j), ELT(j-1), ELT(j-3) ); |
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422 | EDGEFLAG_SET( ELT(j-3), ef3 ); |
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423 | EDGEFLAG_SET( ELT(j-2), ef2 ); |
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424 | EDGEFLAG_SET( ELT(j-1), ef1 ); |
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425 | EDGEFLAG_SET( ELT(j), ef ); |
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426 | } |
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427 | } else { |
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428 | for (j=start+3;j |
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429 | if (ctx->Light.ProvokingVertex == GL_LAST_VERTEX_CONVENTION_EXT || |
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430 | !ctx->Const.QuadsFollowProvokingVertexConvention) |
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431 | RENDER_QUAD( ELT(j-1), ELT(j-3), ELT(j-2), ELT(j) ); |
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432 | else |
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433 | RENDER_QUAD( ELT(j-2), ELT(j), ELT(j-1), ELT(j-3) ); |
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434 | } |
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435 | } |
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436 | POSTFIX; |
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437 | } |
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438 | |||
439 | static void TAG(render_noop)( struct gl_context *ctx, |
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440 | GLuint start, |
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441 | GLuint count, |
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442 | GLuint flags ) |
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443 | { |
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444 | (void)(ctx && start && count && flags); |
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445 | } |
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446 | |||
447 | RENDER_TAB_QUALIFIER void (*TAG(render_tab)[GL_POLYGON+2])(struct gl_context *, |
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448 | GLuint, |
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449 | GLuint, |
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450 | GLuint) = |
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451 | { |
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452 | TAG(render_points), |
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453 | TAG(render_lines), |
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454 | TAG(render_line_loop), |
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455 | TAG(render_line_strip), |
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456 | TAG(render_triangles), |
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457 | TAG(render_tri_strip), |
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458 | TAG(render_tri_fan), |
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459 | TAG(render_quads), |
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460 | TAG(render_quad_strip), |
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461 | TAG(render_poly), |
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462 | TAG(render_noop), |
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463 | }; |
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464 | |||
465 | |||
466 | |||
467 | #ifndef PRESERVE_VB_DEFS |
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468 | #undef RENDER_TRI |
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469 | #undef RENDER_QUAD |
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470 | #undef RENDER_LINE |
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471 | #undef RENDER_POINTS |
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472 | #undef LOCAL_VARS |
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473 | #undef INIT |
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474 | #undef POSTFIX |
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475 | #undef RESET_STIPPLE |
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476 | #undef DBG |
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477 | #undef ELT |
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478 | #undef RENDER_TAB_QUALIFIER |
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479 | #endif |
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480 | |||
481 | #ifndef PRESERVE_TAG |
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482 | #undef TAG |
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483 | #endif |
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484 | |||
485 | #undef PRESERVE_VB_DEFS |
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486 | #undef PRESERVE_TAG>>> |