| 1 | /* -*- mode: C; tab-width:8; c-basic-offset:2 -*- */
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| 2 |
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| 3 | /*
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| 4 | * Mesa 3-D graphics library
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| 5 | * Version: 3.3
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| 6 | *
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| 7 | * Copyright (C) 1999 Brian Paul All Rights Reserved.
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| 8 | *
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| 9 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 10 | * copy of this software and associated documentation files (the "Software"),
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| 11 | * to deal in the Software without restriction, including without limitation
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| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 13 | * and/or sell copies of the Software, and to permit persons to whom the
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| 14 | * Software is furnished to do so, subject to the following conditions:
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| 15 | *
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| 16 | * The above copyright notice and this permission notice shall be included
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| 17 | * in all copies or substantial portions of the Software.
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| 18 | *
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| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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| 22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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| 23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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| 25 | *
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| 26 | *
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| 27 | * Original Mesa / 3Dfx device driver (C) 1999 David Bucciarelli, by the
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| 28 | * terms stated above.
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| 29 | *
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| 30 | * Thank you for your contribution, David!
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| 31 | *
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| 32 | * Please make note of the above copyright/license statement. If you
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| 33 | * contributed code or bug fixes to this code under the previous (GNU
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| 34 | * Library) license and object to the new license, your code will be
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| 35 | * removed at your request. Please see the Mesa docs/COPYRIGHT file
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| 36 | * for more information.
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| 37 | *
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| 38 | * Additional Mesa/3Dfx driver developers:
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| 39 | * Daryll Strauss <daryll@precisioninsight.com>
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| 40 | * Keith Whitwell <keith@precisioninsight.com>
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| 41 | *
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| 42 | * See fxapi.h for more revision/author details.
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| 43 | */
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| 44 |
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| 45 |
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| 46 | /* Build clip space vertices from object space data.
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| 47 | */
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| 48 | static void TAG(fx_setup_full)( struct vertex_buffer *VB, GLuint do_clip )
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| 49 | {
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| 50 | GLcontext *ctx = VB->ctx;
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| 51 | GLfloat *f = (GLfloat *) FX_DRIVER_DATA(VB)->verts;
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| 52 | fxMesaContext fxMesa = FX_CONTEXT(VB->ctx);
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| 53 | GLuint count = VB->Count;
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| 54 | GLuint i;
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| 55 |
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| 56 | const GLfloat * const m = ctx->ModelProjectMatrix.m;
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| 57 |
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| 58 | #if (TYPE & SETUP_RGBA)
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| 59 | GLubyte *color = (GLubyte *)VB->ColorPtr->data;
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| 60 | GLuint color_stride = VB->ColorPtr->stride;
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| 61 | #endif
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| 62 |
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| 63 | #if (TYPE & SETUP_TMU0)
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| 64 | GLuint tmu0_source = fxMesa->tmu_source[0];
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| 65 | struct gl_texture_unit *t0 = &ctx->Texture.Unit[tmu0_source];
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| 66 | GLint s0scale = FX_TEXTURE_DATA(t0)->int_sScale;
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| 67 | GLint t0scale = FX_TEXTURE_DATA(t0)->int_tScale;
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| 68 | GLint *tmu0_int_data = (GLint *)VB->TexCoordPtr[tmu0_source]->data;
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| 69 | GLuint tmu0_stride = VB->TexCoordPtr[tmu0_source]->stride;
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| 70 | #endif
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| 71 |
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| 72 | #if (TYPE & SETUP_TMU1)
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| 73 | GLuint tmu1_source = fxMesa->tmu_source[1];
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| 74 | struct gl_texture_unit *t1 = &ctx->Texture.Unit[tmu1_source];
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| 75 | GLint s1scale = FX_TEXTURE_DATA(t1)->int_sScale;
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| 76 | GLint t1scale = FX_TEXTURE_DATA(t1)->int_tScale;
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| 77 | GLint *tmu1_int_data = (GLint *)VB->TexCoordPtr[tmu1_source]->data;
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| 78 | GLuint tmu1_stride = VB->TexCoordPtr[tmu1_source]->stride;
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| 79 | #endif
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| 80 |
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| 81 | (void) fxMesa;
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| 82 | (void) ctx;
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| 83 | (void) i;
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| 84 | (void) f;
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| 85 |
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| 86 | /* Use 3 seperate loops because it's easier for assembly. A
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| 87 | * best-case solution might be to do all three in a single assembly
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| 88 | * loop.
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| 89 | */
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| 90 | gl_xform_points3_v16_general(FX_DRIVER_DATA(VB)->verts[0].f,
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| 91 | m,
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| 92 | VB->ObjPtr->start,
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| 93 | VB->ObjPtr->stride,
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| 94 | count);
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| 95 |
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| 96 | if (do_clip)
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| 97 | {
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| 98 | VB->ClipAndMask = ~0;
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| 99 | VB->ClipOrMask = 0;
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| 100 | gl_cliptest_points4_v16(FX_DRIVER_DATA(VB)->verts[0].f,
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| 101 | FX_DRIVER_DATA(VB)->verts[count].f,
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| 102 | &(VB->ClipOrMask),
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| 103 | &(VB->ClipAndMask),
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| 104 | VB->ClipMask);
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| 105 | }
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| 106 |
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| 107 |
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| 108 | #if (TYPE)
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| 109 | for (i = 0 ; i < count ; i++, f += 16) {
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| 110 | #if (TYPE & SETUP_RGBA)
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| 111 | GLubyte *col = color; color += color_stride;
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| 112 | UBYTE_COLOR_TO_FLOAT_255_COLOR2( f[CLIP_R], col[0] );
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| 113 | UBYTE_COLOR_TO_FLOAT_255_COLOR2( f[CLIP_G], col[1] );
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| 114 | UBYTE_COLOR_TO_FLOAT_255_COLOR2( f[CLIP_B], col[2] );
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| 115 | UBYTE_COLOR_TO_FLOAT_255_COLOR2( f[CLIP_A], col[3] );
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| 116 | #endif
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| 117 | #if (TYPE & SETUP_TMU0)
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| 118 | * (int *) &f[CLIP_S0] = s0scale + tmu0_int_data[0];
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| 119 | * (int *) &f[CLIP_T0] = t0scale + tmu0_int_data[1];
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| 120 | STRIDE_T(tmu0_int_data, GLint, tmu0_stride);
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| 121 | #endif
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| 122 | #if (TYPE & SETUP_TMU1)
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| 123 | * (int *) &f[CLIP_S1] = s1scale + tmu1_int_data[0];
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| 124 | * (int *) &f[CLIP_T1] = t1scale + tmu1_int_data[1];
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| 125 | STRIDE_T(tmu1_int_data, GLint, tmu1_stride);
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| 126 | #endif
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| 127 | }
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| 128 | #endif
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| 129 |
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| 130 | FX_DRIVER_DATA(VB)->last_vert = &(FX_DRIVER_DATA(VB)->verts[count]);
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| 131 | }
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| 132 |
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| 133 |
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| 134 | /* Do viewport map, device scale and perspective projection.
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| 135 | *
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| 136 | * Rearrange fxVertices to look like grVertices.
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| 137 | */
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| 138 | static void TAG(fx_project_vertices)( GLfloat *first,
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| 139 | GLfloat *last,
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| 140 | const GLfloat *mat,
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| 141 | GLuint stride )
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| 142 | {
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| 143 | GLfloat *f;
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| 144 | VARS_XYZ;
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| 145 |
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| 146 | for ( f = first ; f != last ; STRIDE_F(f, stride))
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| 147 | {
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| 148 | GLfloat oow = 1.0f/f[CLIP_WCOORD]; /* urp! */
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| 149 |
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| 150 | #if FX_USE_PARGB
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| 151 | if (TYPE & SETUP_RGBA) {
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| 152 | PACK_4F_ARGB(GET_PARGB(f),f[CLIP_A],f[CLIP_R],f[CLIP_G],f[CLIP_B]);
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| 153 | }
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| 154 | #else
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| 155 | if (TYPE & SETUP_RGBA) {
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| 156 | f[RCOORD]=f[CLIP_R];
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| 157 | }
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| 158 | #endif
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| 159 | if (TYPE & SETUP_TMU1) {
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| 160 | f[S1COORD] = f[CLIP_S1] * oow;
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| 161 | f[T1COORD] = f[CLIP_T1] * oow;
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| 162 | }
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| 163 |
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| 164 | if (TYPE & SETUP_TMU0) {
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| 165 | f[T0COORD] = f[CLIP_T0] * oow;
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| 166 | f[S0COORD] = f[CLIP_S0] * oow;
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| 167 | }
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| 168 |
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| 169 | DO_SETUP_XYZ;
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| 170 |
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| 171 | f[OOWCOORD] = oow;
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| 172 | }
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| 173 | }
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| 174 |
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| 175 | static void TAG(fx_project_clipped_vertices)( GLfloat *first,
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| 176 | GLfloat *last,
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| 177 | const GLfloat *mat,
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| 178 | GLuint stride,
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| 179 | const GLubyte *mask )
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| 180 | {
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| 181 | GLfloat *f;
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| 182 | VARS_XYZ;
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| 183 |
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| 184 | for ( f = first ; f != last ; STRIDE_F(f, stride), mask++) {
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| 185 | if (!*mask) {
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| 186 |
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| 187 | GLfloat oow = 1.0f / f[CLIP_WCOORD];
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| 188 | #if FX_USE_PARGB
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| 189 | if (TYPE & SETUP_RGBA) {
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| 190 | const GLuint r = f[CLIP_R];
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| 191 | const GLuint g = f[CLIP_G];
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| 192 | const GLuint b = f[CLIP_B];
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| 193 | const GLuint a = f[CLIP_A];
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| 194 | /* ToDo Optimize */
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| 195 | GET_PARGB(f) = a << 24 | r << 16 | g << 8 | b;
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| 196 | }
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| 197 | #else
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| 198 | if (TYPE & SETUP_RGBA) {
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| 199 | f[RCOORD]=f[CLIP_R];
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| 200 | }
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| 201 | #endif
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| 202 |
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| 203 | if (TYPE & SETUP_TMU1) {
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| 204 | f[S1COORD] = f[CLIP_S1] * oow;
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| 205 | f[T1COORD] = f[CLIP_T1] * oow;
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| 206 | }
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| 207 |
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| 208 | if (TYPE & SETUP_TMU0) {
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| 209 | f[T0COORD] = f[CLIP_T0] * oow;
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| 210 | f[S0COORD] = f[CLIP_S0] * oow;
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| 211 | }
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| 212 |
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| 213 | DO_SETUP_XYZ;
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| 214 |
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| 215 | f[OOWCOORD] = oow;
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| 216 | }
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| 217 | }
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| 218 | }
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| 219 |
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| 220 |
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| 221 | static
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| 222 | #if (SIZE <= 8)
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| 223 | INLINE
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| 224 | #endif
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| 225 | void TAG(fx_tri_clip)( GLuint **p_elts,
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| 226 | fxVertex *verts,
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| 227 | GLubyte *clipmask,
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| 228 | GLuint *p_next_vert,
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| 229 | GLubyte mask )
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| 230 | {
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| 231 | GLuint *elts = *p_elts;
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| 232 | GLuint next_vert = *p_next_vert;
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| 233 | GLuint vlist1[VB_MAX_CLIPPED_VERTS];
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| 234 | GLuint vlist2[VB_MAX_CLIPPED_VERTS];
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| 235 | GLuint *inlist[2];
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| 236 | GLuint *out;
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| 237 | GLuint in = 0;
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| 238 | GLuint n = 3;
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| 239 | GLuint i;
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| 240 |
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| 241 | inlist[0] = elts;
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| 242 | inlist[1] = vlist2;
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| 243 |
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| 244 | CLIP(-,0,CLIP_RIGHT_BIT);
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| 245 | CLIP(+,0,CLIP_LEFT_BIT);
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| 246 | CLIP(-,1,CLIP_TOP_BIT);
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| 247 | CLIP(+,1,CLIP_BOTTOM_BIT);
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| 248 | CLIP(-,2,CLIP_FAR_BIT);
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| 249 | CLIP(+,2,CLIP_NEAR_BIT);
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| 250 |
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| 251 | /* Convert the planar polygon to a list of triangles.
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| 252 | */
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| 253 | out = inlist[in];
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| 254 |
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| 255 | for (i = 2 ; i < n ; i++) {
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| 256 | elts[0] = out[0];
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| 257 | elts[1] = out[i-1];
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| 258 | elts[2] = out[i];
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| 259 | elts += 3;
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| 260 | }
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| 261 |
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| 262 | *p_next_vert = next_vert;
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| 263 | *p_elts = elts;
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| 264 | }
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| 265 |
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| 266 |
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| 267 | static INLINE void TAG(fx_line_clip)( GLuint **p_elts,
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| 268 | fxVertex *verts,
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| 269 | GLubyte *clipmask,
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| 270 | GLuint *p_next_vert,
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| 271 | GLubyte mask )
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| 272 | {
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| 273 | GLuint *elts = *p_elts;
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| 274 | GLfloat *I = verts[elts[0]].f;
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| 275 | GLfloat *J = verts[elts[1]].f;
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| 276 | GLuint next_vert = *p_next_vert;
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| 277 |
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| 278 | LINE_CLIP(1,0,0,-1,CLIP_LEFT_BIT);
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| 279 | LINE_CLIP(-1,0,0,1,CLIP_RIGHT_BIT);
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| 280 | LINE_CLIP(0,1,0,-1,CLIP_TOP_BIT);
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| 281 | LINE_CLIP(0,-1,0,1,CLIP_BOTTOM_BIT);
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| 282 | LINE_CLIP(0,0,1,-1,CLIP_FAR_BIT);
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| 283 | LINE_CLIP(0,0,-1,1,CLIP_NEAR_BIT);
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| 284 |
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| 285 | *p_next_vert = next_vert;
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| 286 | *p_elts += 2;
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| 287 | }
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| 288 |
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| 289 |
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| 290 | /* Build a table of functions to clip each primitive type.
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| 291 | */
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| 292 | #define LOCAL_VARS \
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| 293 | GLuint *elt = VB->EltPtr->data; \
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| 294 | fxVertex *verts = FX_DRIVER_DATA(VB)->verts; \
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| 295 | GLuint next_vert = VB->Count; \
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| 296 | GLuint *out = FX_DRIVER_DATA(VB)->clipped_elements.data; \
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| 297 | GLubyte *mask = VB->ClipMask; \
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| 298 |
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| 299 |
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| 300 | #define POSTFIX \
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| 301 | FX_DRIVER_DATA(VB)->clipped_elements.count = \
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| 302 | out - FX_DRIVER_DATA(VB)->clipped_elements.data; \
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| 303 | FX_DRIVER_DATA(VB)->last_vert = &verts[next_vert];
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| 304 |
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| 305 | #define INIT(x)
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| 306 |
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| 307 | #define RENDER_POINTS(start, count) \
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| 308 | do { \
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| 309 | GLuint i; \
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| 310 | for (i = start ; i < count ; i++ ) \
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| 311 | CLIP_POINT( elt[i] ); \
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| 312 | } while (0)
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| 313 |
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| 314 | #define RENDER_LINE(i1, i0) \
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| 315 | CLIP_LINE(elt[i1], elt[i0])
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| 316 |
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| 317 | #define RENDER_TRI(i2, i1, i0, pv, parroty) \
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| 318 | do { \
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| 319 | GLuint e2 = elt[i2], e1 = elt[i1], e0 = elt[i0]; \
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| 320 | if (parroty) e2 = elt[i1], e1 = elt[i2]; \
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| 321 | CLIP_TRIANGLE( e2, e1, e0 ); \
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| 322 | } while (0)
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| 323 |
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| 324 | #define RENDER_QUAD(i3, i2, i1, i0, pv) \
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| 325 | CLIP_TRIANGLE(elt[i3], elt[i2], elt[i0]); \
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| 326 | CLIP_TRIANGLE(elt[i2], elt[i1], elt[i0])
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| 327 |
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| 328 | #define PRESERVE_TAG
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| 329 | #include "render_tmp.h"
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| 330 |
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| 331 |
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| 332 | static void TAG(fx_init_fastpath)( struct fx_fast_tab *tab )
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| 333 | {
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| 334 | GLuint i;
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| 335 |
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| 336 | /* Use the render templates to do clipping.
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| 337 | */
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| 338 | TAG(render_init)();
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| 339 | for (i = 0 ; i < GL_POLYGON+2 ; i++)
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| 340 | tab->clip[i] = TAG(render_tab)[i];
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| 341 |
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| 342 | tab->build_vertices = TAG(fx_setup_full);
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| 343 | tab->project_vertices = TAG(fx_project_vertices);
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| 344 | tab->project_clipped_vertices = TAG(fx_project_clipped_vertices);
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| 345 |
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| 346 | #if defined(USE_3DNOW_ASM)
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| 347 | if (gl_x86_cpu_features & GL_CPU_3Dnow) {
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| 348 | extern void TAG(fx_3dnow_project_vertices)( GLfloat *first,
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| 349 | GLfloat *last,
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| 350 | const GLfloat *mat,
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| 351 | GLuint stride );
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| 352 |
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| 353 | extern void TAG(fx_3dnow_project_clipped_vertices)( GLfloat *first,
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| 354 | GLfloat *last,
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| 355 | const GLfloat *mat,
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| 356 | GLuint stride,
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| 357 | const GLubyte *mask );
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| 358 |
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| 359 | tab->project_vertices = TAG(fx_3dnow_project_vertices);
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| 360 | tab->project_clipped_vertices = TAG(fx_3dnow_project_clipped_vertices);
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| 361 | }
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| 362 | #endif
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| 363 | }
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| 364 |
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| 365 | #undef TYPE
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| 366 | #undef TAG
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| 367 | #undef SIZE
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