mirror of
https://github.com/reactos/reactos.git
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138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/*
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* Texture compression
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* Version: 1.0
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*
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* Copyright (C) 2004 Daniel Borca All Rights Reserved.
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*
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* this is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* this is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Make; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef INTERNAL_H_included
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#define INTERNAL_H_included
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/*****************************************************************************\
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* DLL stuff
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\*****************************************************************************/
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#ifdef __WIN32__
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#define TAPI __declspec(dllexport)
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#define TAPIENTRY __stdcall
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#else
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#define TAPI
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#define TAPIENTRY
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#endif
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/*****************************************************************************\
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* 64bit types on 32bit machine
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\*****************************************************************************/
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#if defined(__GNUC__) && !defined(__cplusplus)
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typedef unsigned long long qword;
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#define Q_MOV32(a, b) a = b
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#define Q_OR32(a, b) a |= b
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#define Q_SHL(a, c) a <<= c
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#else /* !__GNUC__ */
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typedef struct {
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dword lo, hi;
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} qword;
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#define Q_MOV32(a, b) a.lo = b
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#define Q_OR32(a, b) a.lo |= b
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#define Q_SHL(a, c) \
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do { \
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if ((c) >= 32) { \
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a.hi = a.lo << ((c) - 32); \
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a.lo = 0; \
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} else { \
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a.hi = (a.hi << (c)) | (a.lo >> (32 - (c)));\
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a.lo <<= c; \
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} \
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} while (0)
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#endif /* !__GNUC__ */
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/*****************************************************************************\
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* Config
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\*****************************************************************************/
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#define RCOMP 0
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#define GCOMP 1
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#define BCOMP 2
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#define ACOMP 3
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/*****************************************************************************\
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* Metric
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\*****************************************************************************/
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#define F(i) (float)1 /* can be used to obtain an oblong metric: 0.30 / 0.59 / 0.11 */
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#define SAFECDOT 1 /* for paranoids */
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#define MAKEIVEC(NV, NC, IV, B, V0, V1) \
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do { \
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/* compute interpolation vector */\
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float d2 = 0.0F; \
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float rd2; \
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\
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for (i = 0; i < NC; i++) { \
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IV[i] = (V1[i] - V0[i]) * F(i);\
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d2 += IV[i] * IV[i]; \
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} \
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rd2 = (float)NV / d2; \
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B = 0; \
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for (i = 0; i < NC; i++) { \
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IV[i] *= F(i); \
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B -= IV[i] * V0[i]; \
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IV[i] *= rd2; \
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} \
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B = B * rd2 + 0.5F; \
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} while (0)
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#define CALCCDOT(TEXEL, NV, NC, IV, B, V)\
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do { \
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float dot = 0.0F; \
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for (i = 0; i < NC; i++) { \
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dot += V[i] * IV[i]; \
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} \
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TEXEL = (int)(dot + B); \
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if (SAFECDOT) { \
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if (TEXEL < 0) { \
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TEXEL = 0; \
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} else if (TEXEL > NV) { \
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TEXEL = NV; \
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} \
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} \
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} while (0)
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/*****************************************************************************\
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* Utility functions
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\*****************************************************************************/
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void
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_mesa_upscale_teximage2d (unsigned int inWidth, unsigned int inHeight,
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unsigned int outWidth, unsigned int outHeight,
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unsigned int comps,
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const byte *src, int srcRowStride,
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unsigned char *dest);
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#endif
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