19682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* 29682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL - Simple DirectMedia Layer 39682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Copyright (C) 1997-2012 Sam Lantinga 49682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 59682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is free software; you can redistribute it and/or 69682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall modify it under the terms of the GNU Lesser General Public 79682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License as published by the Free Software Foundation; either 89682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall version 2.1 of the License, or (at your option) any later version. 99682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is distributed in the hope that it will be useful, 119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall but WITHOUT ANY WARRANTY; without even the implied warranty of 129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Lesser General Public License for more details. 149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall You should have received a copy of the GNU Lesser General Public 169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License along with this library; if not, write to the Free Software 179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sam Lantinga 209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall slouken@libsdl.org 219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_config.h" 239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_video.h" 259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_blit.h" 269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Functions to blit from bitmaps to other surfaces */ 289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBto1(SDL_BlitInfo *info) 309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width, height; 339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src, *map, *dst; 349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip, dstskip; 359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width = info->d_width; 389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall height = info->d_height; 399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src = info->s_pixels; 409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip = info->s_skip; 419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst = info->d_pixels; 429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip = info->d_skip; 439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall map = info->table; 449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( map ) { 479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( 1 ) { 559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = map[bit]; 569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( 1 ) { 729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = bit; 739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBto2(SDL_BlitInfo *info) 839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width, height; 869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src; 879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 *map, *dst; 889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip, dstskip; 899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width = info->d_width; 929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall height = info->d_height; 939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src = info->s_pixels; 949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip = info->s_skip; 959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst = (Uint16 *)info->d_pixels; 969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip = info->d_skip/2; 979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall map = (Uint16 *)info->table; 989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 1019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 1029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 1039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 1049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 1059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 1079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( 1 ) { 1089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = map[bit]; 1099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 1119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 1129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 1149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 1159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBto3(SDL_BlitInfo *info) 1189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c, o; 1209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width, height; 1219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src, *map, *dst; 1229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip, dstskip; 1239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 1259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width = info->d_width; 1269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall height = info->d_height; 1279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src = info->s_pixels; 1289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip = info->s_skip; 1299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst = info->d_pixels; 1309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip = info->d_skip; 1319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall map = info->table; 1329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 1339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 1359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 1369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 1379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 1389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 1399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 1419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( 1 ) { 1429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall o = bit * 4; 1439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[0] = map[o++]; 1449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[1] = map[o++]; 1459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[2] = map[o++]; 1469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 1489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 3; 1499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 1519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 1529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBto4(SDL_BlitInfo *info) 1559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width, height; 1579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src; 1589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 *map, *dst; 1599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip, dstskip; 1609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 1619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 1639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width = info->d_width; 1649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall height = info->d_height; 1659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src = info->s_pixels; 1669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip = info->s_skip; 1679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst = (Uint32 *)info->d_pixels; 1689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip = info->d_skip/4; 1699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall map = (Uint32 *)info->table; 1709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 1719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 1739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 1749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 1759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 1769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 1779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 1799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( 1 ) { 1809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = map[bit]; 1819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 1839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 1849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 1869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 1879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBto1Key(SDL_BlitInfo *info) 1919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 1939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 1949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 1959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *dst = info->d_pixels; 1969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 1979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 1989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = info->src->colorkey; 1999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *palmap = info->table; 2009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 2019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 2039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 2049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( palmap ) { 2069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 2079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 2089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 2099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 2109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 2119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 2139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( bit != ckey ) { 2149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = palmap[bit]; 2159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 2179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 2189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 2209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 2219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 2239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 2249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 2259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 2269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 2279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 2289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 2309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( bit != ckey ) { 2319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = bit; 2329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 2349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 2359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 2379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 2389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBto2Key(SDL_BlitInfo *info) 2439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 2459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 2469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 2479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 *dstp = (Uint16 *)info->d_pixels; 2489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 2499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 2509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = info->src->colorkey; 2519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *palmap = info->table; 2529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 2539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 2559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 2569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip /= 2; 2579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 2599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 2609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 2619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 2629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 2639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 2659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( bit != ckey ) { 2669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dstp=((Uint16 *)palmap)[bit]; 2679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 2699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstp++; 2709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 2729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstp += dstskip; 2739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBto3Key(SDL_BlitInfo *info) 2779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 2799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 2809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 2819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *dst = info->d_pixels; 2829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 2839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 2849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = info->src->colorkey; 2859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *palmap = info->table; 2869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 2879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 2899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 2909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 2929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 2939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 2949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 2959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 2969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 2989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( bit != ckey ) { 2999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memcpy(dst, &palmap[bit*4], 3); 3009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 3029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 3; 3039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 3059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 3069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBto4Key(SDL_BlitInfo *info) 3109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 3129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 3139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 3149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 *dstp = (Uint32 *)info->d_pixels; 3159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 3169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 3179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = info->src->colorkey; 3189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *palmap = info->table; 3199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 3209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 3229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 3239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip /= 4; 3249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 3269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 3279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 3289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 3299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 3309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 3329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( bit != ckey ) { 3339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dstp=((Uint32 *)palmap)[bit]; 3349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 3369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstp++; 3379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 3399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstp += dstskip; 3409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBtoNAlpha(SDL_BlitInfo *info) 3449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 3469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 3479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 3489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *dst = info->d_pixels; 3499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 3509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 3519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const SDL_Color *srcpal = info->src->palette->colors; 3529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_PixelFormat *dstfmt = info->dst; 3539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstbpp; 3549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 3559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const int A = info->src->alpha; 3569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 3589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstbpp = dstfmt->BytesPerPixel; 3599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 3609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 3629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 3639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 3649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 3659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 3669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 3689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( 1 ) { 3699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 pixel; 3709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall unsigned sR, sG, sB; 3719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall unsigned dR, dG, dB; 3729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sR = srcpal[bit].r; 3739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sG = srcpal[bit].g; 3749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sB = srcpal[bit].b; 3759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DISEMBLE_RGB(dst, dstbpp, dstfmt, 3769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pixel, dR, dG, dB); 3779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); 3789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); 3799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 3819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstbpp; 3829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 3849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 3859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void BlitBtoNAlphaKey(SDL_BlitInfo *info) 3899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 3919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 3929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 3939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *dst = info->d_pixels; 3949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 3959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 3969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_PixelFormat *srcfmt = info->src; 3979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_PixelFormat *dstfmt = info->dst; 3989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const SDL_Color *srcpal = srcfmt->palette->colors; 3999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstbpp; 4009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 4019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const int A = srcfmt->alpha; 4029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = srcfmt->colorkey; 4039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 4059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstbpp = dstfmt->BytesPerPixel; 4069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip += width-(width+7)/8; 4079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 4099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 byte = 0, bit; 4109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=0; c<width; ++c ) { 4119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (c&7) == 0 ) { 4129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte = *src++; 4139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bit = (byte&0x80)>>7; 4159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( bit != ckey ) { 4169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int sR, sG, sB; 4179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dR, dG, dB; 4189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 pixel; 4199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sR = srcpal[bit].r; 4209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sG = srcpal[bit].g; 4219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sB = srcpal[bit].b; 4229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DISEMBLE_RGB(dst, dstbpp, dstfmt, 4239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pixel, dR, dG, dB); 4249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); 4259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); 4269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall byte <<= 1; 4289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstbpp; 4299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 4319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 4329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 4349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic SDL_loblit bitmap_blit[] = { 4369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 4379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 4389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic SDL_loblit colorkey_blit[] = { 4409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key 4419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 4429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallSDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int blit_index) 4449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 4459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int which; 4469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( surface->format->BitsPerPixel != 1 ) { 4489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* We don't support sub 8-bit packed pixel modes */ 4499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return NULL; 4509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( surface->map->dst->format->BitsPerPixel < 8 ) { 4529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall which = 0; 4539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 4549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall which = surface->map->dst->format->BytesPerPixel; 4559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch(blit_index) { 4579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 0: /* copy */ 4589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return bitmap_blit[which]; 4599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 1: /* colorkey */ 4619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return colorkey_blit[which]; 4629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 2: /* alpha */ 4649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return which >= 2 ? BlitBtoNAlpha : NULL; 4659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 4: /* alpha + colorkey */ 4679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return which >= 2 ? BlitBtoNAlphaKey : NULL; 4689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return NULL; 4709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 4719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 472