166 lines
5.1 KiB
C++
166 lines
5.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program 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 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/*
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* aautil.h --- helpers for anti-aliasing routines for Allegro
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*
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* This file is gift-ware. This file is given to you freely
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* as a gift. You may use, modify, redistribute, and generally hack
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* it about in any way you like, and you do not have to give anyone
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* anything in return.
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*
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* I do not accept any responsibility for any effects, adverse or
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* otherwise, that this code may have on just about anything that
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* you can think of. Use it at your own risk.
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*
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* Copyright (C) 1998, 1999 Michael Bukin
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*/
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#ifndef AGS_LIB_AASTR_AAUTIL_H
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#define AGS_LIB_AASTR_AAUTIL_H
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#include "ags/lib/allegro.h"
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namespace AGS3 {
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/*
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* Change aa_BITS, and never aa_SIZE or aa_MASK.
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* 8 or 4 are probably the fastest for i386+.
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* Recompile the package after changing aa_BITS.
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*/
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#ifdef aa_BITS
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#undef aa_BITS
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#endif
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#define aa_BITS 8
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#if ((aa_BITS < 0) || (aa_BITS > 12))
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#error aa_BITS must be (0 <= aa_BITS <= 12)
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#endif
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#define aa_SIZE (1UL << aa_BITS)
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#define aa_MASK (aa_SIZE - 1)
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#define aa_MAX_SIZE (1UL << 12)
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#define aa_MAX_NUM (aa_MAX_SIZE * aa_MAX_SIZE)
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/* Prepare Bresenham line parameters. */
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#define aa_PREPARE(inc,dd,i1,i2,_yw,_xw) \
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{ \
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int xw = (_xw); \
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int yw = (_yw); \
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\
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if ((xw == 0) || ((yw < xw) && (yw > -xw))) { \
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(inc) = 0; \
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} \
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else { \
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(inc) = yw / xw; \
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yw %= xw; \
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} \
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if (yw < 0) { \
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(inc) -= 1; \
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yw += xw; \
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} \
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(i2) = ((dd) = ((i1) = 2 * yw) - xw) - xw; \
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}
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/* Advance to the next point. */
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#define aa_ADVANCE(y,inc,dd,i1,i2) \
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{ \
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if ((dd) >= 0) \
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(y) += (inc) + 1, (dd) += (i2); \
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else \
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(y) += (inc), (dd) += (i1); \
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}
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Prepare offsets for direct access to 24bpp bitmap. */
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void _aa_prepare_for_24bpp(void);
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/* Add r,g,b values from source bitmap. */
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void _aa_add_rgb8(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2, uint32_t _num);
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#ifdef ALLEGRO_COLOR16
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void _aa_add_rgb15(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2, uint32_t _num);
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void _aa_add_rgb16(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2, uint32_t _num);
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#endif
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#ifdef ALLEGRO_COLOR24
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void _aa_add_rgb24(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2, uint32_t _num);
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#endif
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#ifdef ALLEGRO_COLOR32
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void _aa_add_rgb32(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2, uint32_t _num);
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#endif
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/* Put pixel to destination bitmap. */
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void _aa_put_rgb8(byte *addr, int _x);
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#ifdef ALLEGRO_COLOR16
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void _aa_put_rgb15(byte *addr, int _x);
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void _aa_put_rgb16(byte *addr, int _x);
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#endif
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#ifdef ALLEGRO_COLOR24
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void _aa_put_rgb24(byte *addr, int _x);
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#endif
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#ifdef ALLEGRO_COLOR32
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void _aa_put_rgb32(byte *addr, int _x);
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#endif
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/* Add r,g,b and transparency values from source bitmap. */
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void _aa_masked_add_rgb8(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2,
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uint32_t _num);
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#ifdef ALLEGRO_COLOR16
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void _aa_masked_add_rgb15(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2,
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uint32_t _num);
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void _aa_masked_add_rgb16(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2,
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uint32_t _num);
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#endif
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#ifdef ALLEGRO_COLOR24
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void _aa_masked_add_rgb24(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2,
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uint32_t _num);
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#endif
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#ifdef ALLEGRO_COLOR32
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void _aa_masked_add_rgb32(BITMAP *_src, int _sx1, int _sx2, int _sy1, int _sy2,
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uint32_t _num);
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#endif
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/* Put masked pixel to destination bitmap. */
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void _aa_masked_put_rgb8(byte *addr, int _x);
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#ifdef ALLEGRO_COLOR16
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void _aa_masked_put_rgb15(byte *addr, int _x);
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void _aa_masked_put_rgb16(byte *addr, int _x);
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#endif
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#ifdef ALLEGRO_COLOR24
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void _aa_masked_put_rgb24(byte *addr, int _x);
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#endif
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#ifdef ALLEGRO_COLOR32
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void _aa_masked_put_rgb32(byte *addr, int _x);
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#endif
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#ifdef __cplusplus
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}
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#endif
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} // namespace AGS3
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#endif
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