| 1 | /* |
| 2 | * Texture compression |
| 3 | * Version: 1.0 |
| 4 | * |
| 5 | * Copyright (C) 2004 Daniel Borca All Rights Reserved. |
| 6 | * |
| 7 | * this is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * this is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with GNU Make; see the file COPYING. If not, write to |
| 19 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | |
| 23 | #ifndef INTERNAL_H_included |
| 24 | #define INTERNAL_H_included |
| 25 | |
| 26 | /*****************************************************************************\ |
| 27 | * DLL stuff |
| 28 | \*****************************************************************************/ |
| 29 | |
| 30 | #ifdef __WIN32__ |
| 31 | #define TAPI __declspec(dllexport) |
| 32 | #define TAPIENTRY /*__stdcall*/ |
| 33 | #else |
| 34 | #define TAPI |
| 35 | #define TAPIENTRY |
| 36 | #endif |
| 37 | |
| 38 | |
| 39 | /*****************************************************************************\ |
| 40 | * 64bit types on 32bit machine |
| 41 | \*****************************************************************************/ |
| 42 | |
| 43 | #if (defined(__GNUC__) && !defined(__cplusplus)) || defined(__MSC__) |
| 44 | |
| 45 | typedef unsigned long long qword; |
| 46 | |
| 47 | #define Q_MOV32(a, b) a = b |
| 48 | #define Q_OR32(a, b) a |= b |
| 49 | #define Q_SHL(a, c) a <<= c |
| 50 | |
| 51 | #else /* !__GNUC__ */ |
| 52 | |
| 53 | typedef struct { |
| 54 | dword lo, hi; |
| 55 | } qword; |
| 56 | |
| 57 | #define Q_MOV32(a, b) a.lo = b |
| 58 | #define Q_OR32(a, b) a.lo |= b |
| 59 | #define Q_SHL(a, c) \ |
| 60 | do { \ |
| 61 | if ((c) >= 32) { \ |
| 62 | a.hi = a.lo << ((c) - 32); \ |
| 63 | a.lo = 0; \ |
| 64 | } else { \ |
| 65 | a.hi = (a.hi << (c)) | (a.lo >> (32 - (c)));\ |
| 66 | a.lo <<= c; \ |
| 67 | } \ |
| 68 | } while (0) |
| 69 | |
| 70 | #endif /* !__GNUC__ */ |
| 71 | |
| 72 | |
| 73 | /*****************************************************************************\ |
| 74 | * Config |
| 75 | \*****************************************************************************/ |
| 76 | |
| 77 | #define RCOMP 0 |
| 78 | #define GCOMP 1 |
| 79 | #define BCOMP 2 |
| 80 | #define ACOMP 3 |
| 81 | |
| 82 | /*****************************************************************************\ |
| 83 | * Metric |
| 84 | \*****************************************************************************/ |
| 85 | |
| 86 | #define F(i) (float)1 /* can be used to obtain an oblong metric: 0.30 / 0.59 / 0.11 */ |
| 87 | #define SAFECDOT 1 /* for paranoids */ |
| 88 | |
| 89 | #define MAKEIVEC(NV, NC, IV, B, V0, V1) \ |
| 90 | do { \ |
| 91 | /* compute interpolation vector */\ |
| 92 | float d2 = 0.0F; \ |
| 93 | float rd2; \ |
| 94 | \ |
| 95 | for (i = 0; i < NC; i++) { \ |
| 96 | IV[i] = (V1[i] - V0[i]) * F(i);\ |
| 97 | d2 += IV[i] * IV[i]; \ |
| 98 | } \ |
| 99 | rd2 = (float)NV / d2; \ |
| 100 | B = 0; \ |
| 101 | for (i = 0; i < NC; i++) { \ |
| 102 | IV[i] *= F(i); \ |
| 103 | B -= IV[i] * V0[i]; \ |
| 104 | IV[i] *= rd2; \ |
| 105 | } \ |
| 106 | B = B * rd2 + 0.5F; \ |
| 107 | } while (0) |
| 108 | |
| 109 | #define CALCCDOT(TEXEL, NV, NC, IV, B, V)\ |
| 110 | do { \ |
| 111 | float dot = 0.0F; \ |
| 112 | for (i = 0; i < NC; i++) { \ |
| 113 | dot += V[i] * IV[i]; \ |
| 114 | } \ |
| 115 | TEXEL = (int)(dot + B); \ |
| 116 | if (SAFECDOT) { \ |
| 117 | if (TEXEL < 0) { \ |
| 118 | TEXEL = 0; \ |
| 119 | } else if (TEXEL > NV) { \ |
| 120 | TEXEL = NV; \ |
| 121 | } \ |
| 122 | } \ |
| 123 | } while (0) |
| 124 | |
| 125 | |
| 126 | /*****************************************************************************\ |
| 127 | * Utility functions |
| 128 | \*****************************************************************************/ |
| 129 | |
| 130 | void |
| 131 | _mesa_upscale_teximage2d (unsigned int inWidth, unsigned int inHeight, |
| 132 | unsigned int outWidth, unsigned int outHeight, |
| 133 | unsigned int comps, |
| 134 | const byte *src, int srcRowStride, |
| 135 | unsigned char *dest); |
| 136 | |
| 137 | #endif |