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#include "SDL_sysvideo.h" 279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_endian.h" 289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Functions to blit from 8-bit surfaces to other surfaces */ 309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1to1(SDL_BlitInfo *info) 329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifndef USE_DUFFS_LOOP 349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width, height; 379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src, *map, *dst; 389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip, dstskip; 399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width = info->d_width; 429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall height = info->d_height; 439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src = info->s_pixels; 449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip = info->s_skip; 459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst = info->d_pixels; 469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip = info->d_skip; 479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall map = info->table; 489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef USE_DUFFS_LOOP 519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = map[*src]; 549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall , width); 589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=width; c; --c ) { 609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = map[*src]; 619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* This is now endian dependent */ 709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#if ( SDL_BYTEORDER == SDL_LIL_ENDIAN ) 719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define HI 1 729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define LO 0 739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else /* ( SDL_BYTEORDER == SDL_BIG_ENDIAN ) */ 749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define HI 0 759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define LO 1 769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1to2(SDL_BlitInfo *info) 789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifndef USE_DUFFS_LOOP 809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width, height; 839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src, *dst; 849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 *map; 859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip, dstskip; 869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width = info->d_width; 899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall height = info->d_height; 909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src = info->s_pixels; 919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip = info->s_skip; 929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst = info->d_pixels; 939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip = info->d_skip; 949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall map = (Uint16 *)info->table; 959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef USE_DUFFS_LOOP 979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint16 *)dst = map[*src++]; 1019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 2; 1029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }, 1039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width); 1049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 1059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 1069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 1089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Memory align at 4-byte boundary, if necessary */ 1099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (long)dst & 0x03 ) { 1109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Don't do anything if width is 0 */ 1119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( width == 0 ) { 1129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 1139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall --width; 1159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 1179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Perform copy alignment */ 1189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint16 *)dst = map[*src++]; 1199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 2; 1209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Copy in 4 pixel chunks */ 1229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=width/4; c; --c ) { 1239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint32 *)dst = 1249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (map[src[HI]]<<16)|(map[src[LO]]); 1259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += 2; 1269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 4; 1279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint32 *)dst = 1289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (map[src[HI]]<<16)|(map[src[LO]]); 1299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += 2; 1309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 4; 1319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Get any leftovers */ 1339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (width & 3) { 1349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 3: 1359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint16 *)dst = map[*src++]; 1369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 2; 1379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 2: 1389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint32 *)dst = 1399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (map[src[HI]]<<16)|(map[src[LO]]); 1409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += 2; 1419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 4; 1429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 1: 1449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint16 *)dst = map[*src++]; 1459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 2; 1469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 1499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 1509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 1529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 1539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Copy in 4 pixel chunks */ 1549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=width/4; c; --c ) { 1559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint32 *)dst = 1569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (map[src[HI]]<<16)|(map[src[LO]]); 1579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += 2; 1589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 4; 1599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint32 *)dst = 1609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (map[src[HI]]<<16)|(map[src[LO]]); 1619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += 2; 1629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 4; 1639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Get any leftovers */ 1659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (width & 3) { 1669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 3: 1679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint16 *)dst = map[*src++]; 1689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 2; 1699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 2: 1709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint32 *)dst = 1719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (map[src[HI]]<<16)|(map[src[LO]]); 1729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += 2; 1739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 4; 1749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 1: 1769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *(Uint16 *)dst = map[*src++]; 1779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 2; 1789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 1819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 1829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif /* USE_DUFFS_LOOP */ 1859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1to3(SDL_BlitInfo *info) 1879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifndef USE_DUFFS_LOOP 1899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 1909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 1919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int o; 1929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width, height; 1939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src, *map, *dst; 1949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip, dstskip; 1959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 1979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width = info->d_width; 1989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall height = info->d_height; 1999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src = info->s_pixels; 2009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip = info->s_skip; 2019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst = info->d_pixels; 2029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip = info->d_skip; 2039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall map = info->table; 2049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 2069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef USE_DUFFS_LOOP 2079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 2089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall o = *src * 4; 2109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[0] = map[o++]; 2119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[1] = map[o++]; 2129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[2] = map[o++]; 2139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 2159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 3; 2169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall , width); 2179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 2189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=width; c; --c ) { 2199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall o = *src * 4; 2209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[0] = map[o++]; 2219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[1] = map[o++]; 2229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[2] = map[o++]; 2239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 2249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 3; 2259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif /* USE_DUFFS_LOOP */ 2279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 2289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 2299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1to4(SDL_BlitInfo *info) 2329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifndef USE_DUFFS_LOOP 2349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int c; 2359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 2369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width, height; 2379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src; 2389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 *map, *dst; 2399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip, dstskip; 2409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 2429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width = info->d_width; 2439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall height = info->d_height; 2449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src = info->s_pixels; 2459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall srcskip = info->s_skip; 2469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst = (Uint32 *)info->d_pixels; 2479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip = info->d_skip/4; 2489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall map = (Uint32 *)info->table; 2499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 2519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef USE_DUFFS_LOOP 2529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 2539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst++ = map[*src++]; 2549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall , width); 2559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 2569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( c=width/4; c; --c ) { 2579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst++ = map[*src++]; 2589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst++ = map[*src++]; 2599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst++ = map[*src++]; 2609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst++ = map[*src++]; 2619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch ( width & 3 ) { 2639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 3: 2649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst++ = map[*src++]; 2659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 2: 2669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst++ = map[*src++]; 2679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 1: 2689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst++ = map[*src++]; 2699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif /* USE_DUFFS_LOOP */ 2719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 2729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 2739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1to1Key(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 int srcskip = info->s_skip; 2829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *dst = info->d_pixels; 2839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 2849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *palmap = info->table; 2859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = info->src->colorkey; 2869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( palmap ) { 2889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 2899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 2909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( *src != ckey ) { 2929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = palmap[*src]; 2939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 2959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 2969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }, 2979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width); 2989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 2999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 3009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 3029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 3039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 3049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( *src != ckey ) { 3069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dst = *src; 3079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst++; 3099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 3109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }, 3119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width); 3129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 3139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 3149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1to2Key(SDL_BlitInfo *info) 3199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 3219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 3229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 3239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 3249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 *dstp = (Uint16 *)info->d_pixels; 3259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 3269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 *palmap = (Uint16 *)info->table; 3279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = info->src->colorkey; 3289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 3309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip /= 2; 3319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 3339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 3349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( *src != ckey ) { 3369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dstp=palmap[*src]; 3379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 3399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstp++; 3409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }, 3419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width); 3429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 3439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstp += dstskip; 3449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1to3Key(SDL_BlitInfo *info) 3489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 3509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 3519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 3529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 3539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *dst = info->d_pixels; 3549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 3559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *palmap = info->table; 3569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = info->src->colorkey; 3579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int o; 3589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 3609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 3619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( *src != ckey ) { 3639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall o = *src * 4; 3649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[0] = palmap[o++]; 3659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[1] = palmap[o++]; 3669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst[2] = palmap[o++]; 3679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 3699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += 3; 3709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }, 3719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width); 3729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 3739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 3749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1to4Key(SDL_BlitInfo *info) 3789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 3809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 3819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 3829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 3839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 *dstp = (Uint32 *)info->d_pixels; 3849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 3859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 *palmap = (Uint32 *)info->table; 3869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = info->src->colorkey; 3879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 3899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstskip /= 4; 3909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 3929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 3939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( *src != ckey ) { 3959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *dstp = palmap[*src]; 3969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 3989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstp++; 3999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }, 4009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width); 4019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 4029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstp += dstskip; 4039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 4059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1toNAlpha(SDL_BlitInfo *info) 4079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 4089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 4099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 4109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 4119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 4129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *dst = info->d_pixels; 4139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 4149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_PixelFormat *dstfmt = info->dst; 4159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const SDL_Color *srcpal = info->src->palette->colors; 4169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstbpp; 4179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const int A = info->src->alpha; 4189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 4209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstbpp = dstfmt->BytesPerPixel; 4219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 4239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int sR, sG, sB; 4249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dR, dG, dB; 4259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP4( 4269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 pixel; 4289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sR = srcpal[*src].r; 4299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sG = srcpal[*src].g; 4309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sB = srcpal[*src].b; 4319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DISEMBLE_RGB(dst, dstbpp, dstfmt, 4329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pixel, dR, dG, dB); 4339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); 4349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); 4359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 4369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstbpp; 4379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }, 4389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width); 4399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 4409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 4419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 4439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Blit1toNAlphaKey(SDL_BlitInfo *info) 4459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 4469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int width = info->d_width; 4479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int height = info->d_height; 4489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *src = info->s_pixels; 4499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int srcskip = info->s_skip; 4509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *dst = info->d_pixels; 4519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstskip = info->d_skip; 4529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_PixelFormat *srcfmt = info->src; 4539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_PixelFormat *dstfmt = info->dst; 4549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const SDL_Color *srcpal = info->src->palette->colors; 4559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 ckey = srcfmt->colorkey; 4569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dstbpp; 4579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const int A = srcfmt->alpha; 4589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set up some basic variables */ 4609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstbpp = dstfmt->BytesPerPixel; 4619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( height-- ) { 4639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int sR, sG, sB; 4649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int dR, dG, dB; 4659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DUFFS_LOOP( 4669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( *src != ckey ) { 4689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint32 pixel; 4699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sR = srcpal[*src].r; 4709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sG = srcpal[*src].g; 4719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall sB = srcpal[*src].b; 4729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DISEMBLE_RGB(dst, dstbpp, dstfmt, 4739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pixel, dR, dG, dB); 4749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); 4759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); 4769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src++; 4789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstbpp; 4799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall }, 4809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall width); 4819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall src += srcskip; 4829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dst += dstskip; 4839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 4859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic SDL_loblit one_blit[] = { 4879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall NULL, Blit1to1, Blit1to2, Blit1to3, Blit1to4 4889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 4899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic SDL_loblit one_blitkey[] = { 4919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall NULL, Blit1to1Key, Blit1to2Key, Blit1to3Key, Blit1to4Key 4929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 4939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallSDL_loblit SDL_CalculateBlit1(SDL_Surface *surface, int blit_index) 4959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 4969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int which; 4979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_PixelFormat *dstfmt; 4989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall dstfmt = surface->map->dst->format; 5009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( dstfmt->BitsPerPixel < 8 ) { 5019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall which = 0; 5029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 5039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall which = dstfmt->BytesPerPixel; 5049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch(blit_index) { 5069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 0: /* copy */ 5079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return one_blit[which]; 5089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 1: /* colorkey */ 5109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return one_blitkey[which]; 5119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 2: /* alpha */ 5139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Supporting 8bpp->8bpp alpha is doable but requires lots of 5149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall tables which consume space and takes time to precompute, 5159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall so is better left to the user */ 5169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return which >= 2 ? Blit1toNAlpha : NULL; 5179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 3: /* alpha + colorkey */ 5199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return which >= 2 ? Blit1toNAlphaKey : NULL; 5209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 5229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return NULL; 5239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 524