| 1 | /* $Id: interp_tmp.h,v 1.2 2000-05-23 20:34:51 jeroen Exp $ */
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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: 3.1
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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 | #define INTERP_UBYTE( out, t, a, b ) { \
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| 28 | GLfloat fa = UBYTE_COLOR_TO_FLOAT_COLOR(a); \
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| 29 | GLfloat fb = UBYTE_COLOR_TO_FLOAT_COLOR(b); \
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| 30 | GLfloat fo = LINTERP(t, fa, fb); \
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| 31 | FLOAT_COLOR_TO_UBYTE_COLOR(out, fo); \
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| 32 | }
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| 33 |
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| 34 | #if 1
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| 35 |
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| 36 | #define INTERP_RGBA(nr, t, out, a, b) { \
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| 37 | int i; \
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| 38 | for (i = 0; i < nr; i++) { \
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| 39 | GLfloat fa = UBYTE_COLOR_TO_FLOAT_COLOR(a[i]); \
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| 40 | GLfloat fb = UBYTE_COLOR_TO_FLOAT_COLOR(b[i]); \
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| 41 | GLfloat fo = LINTERP(t, fa, fb); \
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| 42 | FLOAT_COLOR_TO_UBYTE_COLOR(out[i], fo); \
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| 43 | } \
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| 44 | }
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| 45 | #else
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| 46 |
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| 47 | #define INTERP_RGBA(nr, t, out, a, b) { \
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| 48 | int n; \
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| 49 | const GLuint ti = FloatToInt(t*256.0F); \
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| 50 | const GLubyte *Ib = (const GLubyte *)&a[0]; \
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| 51 | const GLubyte *Jb = (const GLubyte *)&b[0]; \
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| 52 | GLubyte *Ob = (GLubyte *)&out[0]; \
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| 53 | \
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| 54 | for (n = 0 ; n < nr ; n++) \
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| 55 | Ob[n] = (GLubyte) (Ib[n] + ((ti * (Jb[n] - Ib[n]))/256)); \
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| 56 | }
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| 57 | #endif
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| 58 |
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| 59 | static void NAME( struct vertex_buffer *VB,
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| 60 | GLuint dst, GLfloat t, GLuint in, GLuint out )
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| 61 | {
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| 62 | (void) VB;
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| 63 | (void) dst;
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| 64 | (void) t;
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| 65 | (void) in;
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| 66 | (void) out;
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| 67 |
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| 68 | #if (IND & CLIP_RGBA0)
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| 69 | INTERP_RGBA( 4, t,
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| 70 | VB->Color[0]->data[dst],
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| 71 | VB->Color[0]->data[in],
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| 72 | VB->Color[0]->data[out] );
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| 73 | #endif
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| 74 |
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| 75 | #if (IND & CLIP_RGBA1)
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| 76 | if (VB->ctx->TriangleCaps & DD_TRI_LIGHT_TWOSIDE) {
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| 77 | INTERP_RGBA( 4, t,
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| 78 | VB->Color[1]->data[dst],
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| 79 | VB->Color[1]->data[in],
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| 80 | VB->Color[1]->data[out] );
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| 81 | }
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| 82 |
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| 83 | if (VB->ctx->TriangleCaps & DD_SEPERATE_SPECULAR)
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| 84 | {
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| 85 | INTERP_RGBA( 3, t,
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| 86 | VB->Spec[0][dst],
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| 87 | VB->Spec[0][in],
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| 88 | VB->Spec[0][out] );
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| 89 |
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| 90 | if (VB->ctx->TriangleCaps & DD_TRI_LIGHT_TWOSIDE) {
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| 91 | INTERP_RGBA( 3, t,
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| 92 | VB->Spec[1][dst],
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| 93 | VB->Spec[1][in],
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| 94 | VB->Spec[1][out] );
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| 95 | }
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| 96 | }
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| 97 | #endif
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| 98 |
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| 99 | #if (IND & CLIP_FOG_COORD)
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| 100 | {
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| 101 | GLubyte a = VB->Spec[0][in][3], b = VB->Spec[0][out][3];
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| 102 | INTERP_UBYTE( VB->Spec[0][dst][3], t, a, b );
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| 103 | }
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| 104 | #endif
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| 105 |
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| 106 |
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| 107 | #if (IND & CLIP_INDEX0)
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| 108 | VB->IndexPtr->data[dst] = (GLuint) (GLint)
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| 109 | LINTERP( t,
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| 110 | (GLfloat) VB->Index[0]->data[in],
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| 111 | (GLfloat) VB->Index[0]->data[out] );
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| 112 | #endif
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| 113 |
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| 114 | #if (IND & CLIP_INDEX1)
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| 115 | VB->Index[1]->data[dst] = (GLuint) (GLint)
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| 116 | LINTERP( t,
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| 117 | (GLfloat) VB->Index[1]->data[in],
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| 118 | (GLfloat) VB->Index[1]->data[out] );
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| 119 | #endif
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| 120 |
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| 121 | #if (IND & CLIP_TEX0)
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| 122 | INTERP_SZ( t,
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| 123 | VB->TexCoordPtr[0]->data,
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| 124 | dst, in, out,
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| 125 | VB->TexCoordPtr[0]->size );
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| 126 | #endif
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| 127 |
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| 128 | #if (IND & CLIP_TEX1)
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| 129 | INTERP_SZ( t,
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| 130 | VB->TexCoordPtr[1]->data,
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| 131 | dst, in, out,
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| 132 | VB->TexCoordPtr[1]->size );
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| 133 | #endif
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| 134 | }
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| 135 |
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| 136 |
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| 137 | #undef IND
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| 138 | #undef NAME
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