src/video/SDL_blit_1.c
author Edgar Simo <bobbens@gmail.com>
Mon, 04 Aug 2008 11:30:16 +0000
branchgsoc2008_force_feedback
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permissions -rw-r--r--
Fixed warning.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library 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 GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#include "SDL_video.h"
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#include "SDL_blit.h"
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#include "SDL_sysvideo.h"
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#include "SDL_endian.h"
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/* Functions to blit from 8-bit surfaces to other surfaces */
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static void
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Blit1to1(SDL_BlitInfo * info)
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{
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#ifndef USE_DUFFS_LOOP
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    int c;
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#endif
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    int width, height;
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    Uint8 *src, *map, *dst;
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    int srcskip, dstskip;
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    /* Set up some basic variables */
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    width = info->dst_w;
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    height = info->dst_h;
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    src = info->src;
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    srcskip = info->src_skip;
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    dst = info->dst;
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    dstskip = info->dst_skip;
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    map = info->table;
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    while (height--) {
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#ifdef USE_DUFFS_LOOP
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        /* *INDENT-OFF* */
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		DUFFS_LOOP(
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			{
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			  *dst = map[*src];
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			}
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			dst++;
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			src++;
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		, width);
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        /* *INDENT-ON* */
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#else
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        for (c = width; c; --c) {
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            *dst = map[*src];
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            dst++;
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            src++;
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        }
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#endif
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        src += srcskip;
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        dst += dstskip;
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    }
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}
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/* This is now endian dependent */
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#if ( SDL_BYTEORDER == SDL_LIL_ENDIAN )
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#define HI	1
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#define LO	0
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#else /* ( SDL_BYTEORDER == SDL_BIG_ENDIAN ) */
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#define HI	0
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#define LO	1
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#endif
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static void
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Blit1to2(SDL_BlitInfo * info)
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{
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#ifndef USE_DUFFS_LOOP
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    int c;
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#endif
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    int width, height;
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    Uint8 *src, *dst;
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    Uint16 *map;
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    int srcskip, dstskip;
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    /* Set up some basic variables */
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    width = info->dst_w;
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    height = info->dst_h;
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    src = info->src;
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    srcskip = info->src_skip;
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    dst = info->dst;
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    dstskip = info->dst_skip;
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    map = (Uint16 *) info->table;
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#ifdef USE_DUFFS_LOOP
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    while (height--) {
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		/* *INDENT-OFF* */
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		DUFFS_LOOP(
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		{
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			*(Uint16 *)dst = map[*src++];
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			dst += 2;
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		},
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		width);
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		/* *INDENT-ON* */
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        src += srcskip;
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        dst += dstskip;
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    }
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#else
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    /* Memory align at 4-byte boundary, if necessary */
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    if ((long) dst & 0x03) {
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        /* Don't do anything if width is 0 */
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        if (width == 0) {
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            return;
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        }
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        --width;
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        while (height--) {
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            /* Perform copy alignment */
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            *(Uint16 *) dst = map[*src++];
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            dst += 2;
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            /* Copy in 4 pixel chunks */
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            for (c = width / 4; c; --c) {
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                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
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                src += 2;
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                dst += 4;
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                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
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                src += 2;
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                dst += 4;
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   136
            }
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            /* Get any leftovers */
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            switch (width & 3) {
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            case 3:
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                *(Uint16 *) dst = map[*src++];
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                dst += 2;
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   142
            case 2:
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                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
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                src += 2;
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                dst += 4;
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                break;
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   147
            case 1:
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                *(Uint16 *) dst = map[*src++];
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                dst += 2;
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   150
                break;
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   151
            }
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            src += srcskip;
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            dst += dstskip;
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        }
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    } else {
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        while (height--) {
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            /* Copy in 4 pixel chunks */
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            for (c = width / 4; c; --c) {
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   159
                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
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                src += 2;
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                dst += 4;
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   162
                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
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                src += 2;
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                dst += 4;
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   165
            }
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   166
            /* Get any leftovers */
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   167
            switch (width & 3) {
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   168
            case 3:
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                *(Uint16 *) dst = map[*src++];
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                dst += 2;
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   171
            case 2:
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                *(Uint32 *) dst = (map[src[HI]] << 16) | (map[src[LO]]);
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                src += 2;
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   174
                dst += 4;
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   175
                break;
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   176
            case 1:
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   177
                *(Uint16 *) dst = map[*src++];
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                dst += 2;
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   179
                break;
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   180
            }
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   181
            src += srcskip;
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            dst += dstskip;
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   183
        }
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   184
    }
0
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#endif /* USE_DUFFS_LOOP */
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   186
}
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   187
static void
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Blit1to3(SDL_BlitInfo * info)
0
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{
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   190
#ifndef USE_DUFFS_LOOP
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    int c;
0
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   192
#endif
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   193
    int o;
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   194
    int width, height;
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   195
    Uint8 *src, *map, *dst;
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   196
    int srcskip, dstskip;
0
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diff changeset
   197
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   198
    /* Set up some basic variables */
2262
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   199
    width = info->dst_w;
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   200
    height = info->dst_h;
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   201
    src = info->src;
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c785543d1843 Okay, still some bugs, but everything builds again...
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   202
    srcskip = info->src_skip;
2262
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   203
    dst = info->dst;
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   204
    dstskip = info->dst_skip;
1895
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   205
    map = info->table;
0
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diff changeset
   206
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   207
    while (height--) {
0
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   208
#ifdef USE_DUFFS_LOOP
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   209
		/* *INDENT-OFF* */
0
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   210
		DUFFS_LOOP(
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   211
			{
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   212
				o = *src * 4;
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   213
				dst[0] = map[o++];
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   214
				dst[1] = map[o++];
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diff changeset
   215
				dst[2] = map[o++];
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diff changeset
   216
			}
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   217
			src++;
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   218
			dst += 3;
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   219
		, width);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   220
		/* *INDENT-ON* */
0
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diff changeset
   221
#else
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   222
        for (c = width; c; --c) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   223
            o = *src * 4;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   224
            dst[0] = map[o++];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   225
            dst[1] = map[o++];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   226
            dst[2] = map[o++];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   227
            src++;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   228
            dst += 3;
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   229
        }
0
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   230
#endif /* USE_DUFFS_LOOP */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   231
        src += srcskip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   232
        dst += dstskip;
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   233
    }
0
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   234
}
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   235
static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   236
Blit1to4(SDL_BlitInfo * info)
0
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diff changeset
   237
{
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   238
#ifndef USE_DUFFS_LOOP
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   239
    int c;
0
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   240
#endif
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   241
    int width, height;
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   242
    Uint8 *src;
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   243
    Uint32 *map, *dst;
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   244
    int srcskip, dstskip;
0
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   245
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   246
    /* Set up some basic variables */
2262
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diff changeset
   247
    width = info->dst_w;
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diff changeset
   248
    height = info->dst_h;
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diff changeset
   249
    src = info->src;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   250
    srcskip = info->src_skip;
2262
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diff changeset
   251
    dst = (Uint32 *) info->dst;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   252
    dstskip = info->dst_skip / 4;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   253
    map = (Uint32 *) info->table;
0
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diff changeset
   254
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   255
    while (height--) {
0
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   256
#ifdef USE_DUFFS_LOOP
1895
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   257
		/* *INDENT-OFF* */
0
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   258
		DUFFS_LOOP(
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   259
			*dst++ = map[*src++];
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   260
		, width);
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		/* *INDENT-ON* */
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#else
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        for (c = width / 4; c; --c) {
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            *dst++ = map[*src++];
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            *dst++ = map[*src++];
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            *dst++ = map[*src++];
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            *dst++ = map[*src++];
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        }
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        switch (width & 3) {
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        case 3:
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            *dst++ = map[*src++];
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        case 2:
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            *dst++ = map[*src++];
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        case 1:
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            *dst++ = map[*src++];
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        }
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#endif /* USE_DUFFS_LOOP */
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        src += srcskip;
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        dst += dstskip;
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    }
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}
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static void
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Blit1to1Key(SDL_BlitInfo * info)
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{
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    int width = info->dst_w;
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    int height = info->dst_h;
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    Uint8 *src = info->src;
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    int srcskip = info->src_skip;
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    Uint8 *dst = info->dst;
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    int dstskip = info->dst_skip;
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    Uint8 *palmap = info->table;
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    Uint32 ckey = info->colorkey;
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    if (palmap) {
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        while (height--) {
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			/* *INDENT-OFF* */
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			DUFFS_LOOP(
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			{
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				if ( *src != ckey ) {
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				  *dst = palmap[*src];
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				}
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				dst++;
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				src++;
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			},
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			width);
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			/* *INDENT-ON* */
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            src += srcskip;
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            dst += dstskip;
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        }
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    } else {
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        while (height--) {
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			/* *INDENT-OFF* */
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			DUFFS_LOOP(
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			{
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				if ( *src != ckey ) {
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				  *dst = *src;
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   318
				}
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				dst++;
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				src++;
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			},
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			width);
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			/* *INDENT-ON* */
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            src += srcskip;
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            dst += dstskip;
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   326
        }
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   327
    }
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}
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static void
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Blit1to2Key(SDL_BlitInfo * info)
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{
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   333
    int width = info->dst_w;
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   334
    int height = info->dst_h;
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   335
    Uint8 *src = info->src;
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   336
    int srcskip = info->src_skip;
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   337
    Uint16 *dstp = (Uint16 *) info->dst;
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   338
    int dstskip = info->dst_skip;
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    Uint16 *palmap = (Uint16 *) info->table;
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    Uint32 ckey = info->colorkey;
0
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   341
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   342
    /* Set up some basic variables */
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    dstskip /= 2;
0
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   344
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   345
    while (height--) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   346
		/* *INDENT-OFF* */
0
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   347
		DUFFS_LOOP(
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   348
		{
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   349
			if ( *src != ckey ) {
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   350
				*dstp=palmap[*src];
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   351
			}
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   352
			src++;
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   353
			dstp++;
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   354
		},
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   355
		width);
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   356
		/* *INDENT-ON* */
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   357
        src += srcskip;
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   358
        dstp += dstskip;
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   359
    }
0
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   360
}
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   361
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   362
static void
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   363
Blit1to3Key(SDL_BlitInfo * info)
0
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diff changeset
   364
{
2262
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   365
    int width = info->dst_w;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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diff changeset
   366
    int height = info->dst_h;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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diff changeset
   367
    Uint8 *src = info->src;
2267
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diff changeset
   368
    int srcskip = info->src_skip;
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   369
    Uint8 *dst = info->dst;
2267
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diff changeset
   370
    int dstskip = info->dst_skip;
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   371
    Uint8 *palmap = info->table;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
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diff changeset
   372
    Uint32 ckey = info->colorkey;
1895
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   373
    int o;
0
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   374
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   375
    while (height--) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   376
		/* *INDENT-OFF* */
0
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diff changeset
   377
		DUFFS_LOOP(
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diff changeset
   378
		{
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   379
			if ( *src != ckey ) {
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parents:
diff changeset
   380
				o = *src * 4;
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parents:
diff changeset
   381
				dst[0] = palmap[o++];
74212992fb08 Initial revision
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parents:
diff changeset
   382
				dst[1] = palmap[o++];
74212992fb08 Initial revision
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parents:
diff changeset
   383
				dst[2] = palmap[o++];
74212992fb08 Initial revision
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parents:
diff changeset
   384
			}
74212992fb08 Initial revision
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parents:
diff changeset
   385
			src++;
74212992fb08 Initial revision
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parents:
diff changeset
   386
			dst += 3;
74212992fb08 Initial revision
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parents:
diff changeset
   387
		},
74212992fb08 Initial revision
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parents:
diff changeset
   388
		width);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   389
		/* *INDENT-ON* */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   390
        src += srcskip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   391
        dst += dstskip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   392
    }
0
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parents:
diff changeset
   393
}
74212992fb08 Initial revision
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diff changeset
   394
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diff changeset
   395
static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   396
Blit1to4Key(SDL_BlitInfo * info)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   397
{
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   398
    int width = info->dst_w;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   399
    int height = info->dst_h;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   400
    Uint8 *src = info->src;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   401
    int srcskip = info->src_skip;
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   402
    Uint32 *dstp = (Uint32 *) info->dst;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   403
    int dstskip = info->dst_skip;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   404
    Uint32 *palmap = (Uint32 *) info->table;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   405
    Uint32 ckey = info->colorkey;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   406
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   407
    /* Set up some basic variables */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   408
    dstskip /= 4;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   409
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   410
    while (height--) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   411
		/* *INDENT-OFF* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   412
		DUFFS_LOOP(
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   413
		{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   414
			if ( *src != ckey ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   415
				*dstp = palmap[*src];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   416
			}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   417
			src++;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   418
			dstp++;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   419
		},
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   420
		width);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   421
		/* *INDENT-ON* */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   422
        src += srcskip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   423
        dstp += dstskip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   424
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   425
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   426
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   427
static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   428
Blit1toNAlpha(SDL_BlitInfo * info)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   429
{
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   430
    int width = info->dst_w;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   431
    int height = info->dst_h;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   432
    Uint8 *src = info->src;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   433
    int srcskip = info->src_skip;
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   434
    Uint8 *dst = info->dst;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   435
    int dstskip = info->dst_skip;
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   436
    SDL_PixelFormat *dstfmt = info->dst_fmt;
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   437
    const SDL_Color *srcpal = info->src_fmt->palette->colors;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   438
    int dstbpp;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   439
    const int A = info->a;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   440
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   441
    /* Set up some basic variables */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   442
    dstbpp = dstfmt->BytesPerPixel;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   443
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   444
    while (height--) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   445
        int sR, sG, sB;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   446
        int dR, dG, dB;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   447
	    	/* *INDENT-OFF* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   448
	    	DUFFS_LOOP4(
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   449
			{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   450
			        Uint32 pixel;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   451
				sR = srcpal[*src].r;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   452
				sG = srcpal[*src].g;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   453
				sB = srcpal[*src].b;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   454
				DISEMBLE_RGB(dst, dstbpp, dstfmt,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   455
					     pixel, dR, dG, dB);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   456
				ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   457
			  	ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   458
				src++;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   459
				dst += dstbpp;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   460
			},
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   461
			width);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   462
	    	/* *INDENT-ON* */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   463
        src += srcskip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   464
        dst += dstskip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   465
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   466
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   467
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   468
static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   469
Blit1toNAlphaKey(SDL_BlitInfo * info)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   470
{
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   471
    int width = info->dst_w;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   472
    int height = info->dst_h;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   473
    Uint8 *src = info->src;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   474
    int srcskip = info->src_skip;
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2257
diff changeset
   475
    Uint8 *dst = info->dst;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   476
    int dstskip = info->dst_skip;
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   477
    SDL_PixelFormat *srcfmt = info->src_fmt;
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   478
    SDL_PixelFormat *dstfmt = info->dst_fmt;
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   479
    const SDL_Color *srcpal = info->src_fmt->palette->colors;
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   480
    Uint32 ckey = info->colorkey;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   481
    int dstbpp;
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   482
    const int A = info->a;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   483
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   484
    /* Set up some basic variables */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   485
    dstbpp = dstfmt->BytesPerPixel;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   486
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   487
    while (height--) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   488
        int sR, sG, sB;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   489
        int dR, dG, dB;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   490
		/* *INDENT-OFF* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   491
		DUFFS_LOOP(
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   492
		{
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   493
			if ( *src != ckey ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   494
			        Uint32 pixel;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   495
				sR = srcpal[*src].r;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   496
				sG = srcpal[*src].g;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   497
				sB = srcpal[*src].b;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   498
				DISEMBLE_RGB(dst, dstbpp, dstfmt,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   499
							pixel, dR, dG, dB);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   500
				ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   501
			  	ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   502
			}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   503
			src++;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   504
			dst += dstbpp;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   505
		},
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   506
		width);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   507
		/* *INDENT-ON* */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   508
        src += srcskip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   509
        dst += dstskip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   510
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   511
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   512
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   513
static SDL_BlitFunc one_blit[] = {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   514
    NULL, Blit1to1, Blit1to2, Blit1to3, Blit1to4
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   515
};
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   516
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   517
static SDL_BlitFunc one_blitkey[] = {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   518
    NULL, Blit1to1Key, Blit1to2Key, Blit1to3Key, Blit1to4Key
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   519
};
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   520
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   521
SDL_BlitFunc
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   522
SDL_CalculateBlit1(SDL_Surface * surface)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   523
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   524
    int which;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   525
    SDL_PixelFormat *dstfmt;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   526
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   527
    dstfmt = surface->map->dst->format;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   528
    if (dstfmt->BitsPerPixel < 8) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   529
        which = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   530
    } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   531
        which = dstfmt->BytesPerPixel;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   532
    }
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   533
    switch (surface->map->info.flags) {
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   534
    case 0:
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   535
        return one_blit[which];
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   536
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   537
    case SDL_COPY_COLORKEY:
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   538
        return one_blitkey[which];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   539
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   540
    case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   541
        /* Supporting 8bpp->8bpp alpha is doable but requires lots of
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   542
           tables which consume space and takes time to precompute,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   543
           so is better left to the user */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   544
        return which >= 2 ? Blit1toNAlpha : NULL;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   545
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
   546
    case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   547
        return which >= 2 ? Blit1toNAlphaKey : NULL;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   548
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   549
    return NULL;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   550
}
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   551
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   552
/* vi: set ts=4 sw=4 expandtab: */