Mercurial > sdl-ios-xcode
view src/video/SDL_blit_0.c @ 571:8e3ce997621c
Date: Thu, 16 Jan 2003 13:48:31 +0200
From: "Mike Gorchak"
Subject: All QNX patches
whole patches concerning QNX. Almost all code has been rewritten by Julian
and me. Added initial support for hw overlays in QNX and many many others
fixes.
P.S. This patches has been reviewed by Dave Rempel from QSSL and included in
SDL 1.2.5 distribution, which coming on 3rd party CD for newest 6.2.1
version of QNX, which will be available soon.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 20 Jan 2003 01:38:37 +0000 |
parents | f6ffac90895c |
children | b8d311d90021 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif #include <stdio.h> #include <string.h> #include "SDL_types.h" #include "SDL_video.h" #include "SDL_blit.h" /* Functions to blit from bitmaps to other surfaces */ static void BlitBto1(SDL_BlitInfo *info) { int c; int width, height; Uint8 *src, *map, *dst; int srcskip, dstskip; /* Set up some basic variables */ width = info->d_width; height = info->d_height; src = info->s_pixels; srcskip = info->s_skip; dst = info->d_pixels; dstskip = info->d_skip; map = info->table; srcskip += width-(width+7)/8; if ( map ) { while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( 1 ) { *dst = map[bit]; } dst++; byte <<= 1; } src += srcskip; dst += dstskip; } } else { while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( 1 ) { *dst = bit; } dst++; byte <<= 1; } src += srcskip; dst += dstskip; } } } static void BlitBto2(SDL_BlitInfo *info) { int c; int width, height; Uint8 *src; Uint16 *map, *dst; int srcskip, dstskip; /* Set up some basic variables */ width = info->d_width; height = info->d_height; src = info->s_pixels; srcskip = info->s_skip; dst = (Uint16 *)info->d_pixels; dstskip = info->d_skip/2; map = (Uint16 *)info->table; srcskip += width-(width+7)/8; while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( 1 ) { *dst = map[bit]; } byte <<= 1; dst++; } src += srcskip; dst += dstskip; } } static void BlitBto3(SDL_BlitInfo *info) { int c, o; int width, height; Uint8 *src, *map, *dst; int srcskip, dstskip; /* Set up some basic variables */ width = info->d_width; height = info->d_height; src = info->s_pixels; srcskip = info->s_skip; dst = info->d_pixels; dstskip = info->d_skip; map = info->table; srcskip += width-(width+7)/8; while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( 1 ) { o = bit * 4; dst[0] = map[o++]; dst[1] = map[o++]; dst[2] = map[o++]; } byte <<= 1; dst += 3; } src += srcskip; dst += dstskip; } } static void BlitBto4(SDL_BlitInfo *info) { int width, height; Uint8 *src; Uint32 *map, *dst; int srcskip, dstskip; int c; /* Set up some basic variables */ width = info->d_width; height = info->d_height; src = info->s_pixels; srcskip = info->s_skip; dst = (Uint32 *)info->d_pixels; dstskip = info->d_skip/4; map = (Uint32 *)info->table; srcskip += width-(width+7)/8; while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( 1 ) { *dst = map[bit]; } byte <<= 1; dst++; } src += srcskip; dst += dstskip; } } static void BlitBto1Key(SDL_BlitInfo *info) { int width = info->d_width; int height = info->d_height; Uint8 *src = info->s_pixels; Uint8 *dst = info->d_pixels; int srcskip = info->s_skip; int dstskip = info->d_skip; Uint32 ckey = info->src->colorkey; Uint8 *palmap = info->table; int c; /* Set up some basic variables */ srcskip += width-(width+7)/8; if ( palmap ) { while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( bit != ckey ) { *dst = palmap[bit]; } dst++; byte <<= 1; } src += srcskip; dst += dstskip; } } else { while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( bit != ckey ) { *dst = bit; } dst++; byte <<= 1; } src += srcskip; dst += dstskip; } } } static void BlitBto2Key(SDL_BlitInfo *info) { int width = info->d_width; int height = info->d_height; Uint8 *src = info->s_pixels; Uint16 *dstp = (Uint16 *)info->d_pixels; int srcskip = info->s_skip; int dstskip = info->d_skip; Uint32 ckey = info->src->colorkey; Uint8 *palmap = info->table; int c; /* Set up some basic variables */ srcskip += width-(width+7)/8; dstskip /= 2; while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( bit != ckey ) { *dstp=((Uint16 *)palmap)[bit]; } byte <<= 1; dstp++; } src += srcskip; dstp += dstskip; } } static void BlitBto3Key(SDL_BlitInfo *info) { int width = info->d_width; int height = info->d_height; Uint8 *src = info->s_pixels; Uint8 *dst = info->d_pixels; int srcskip = info->s_skip; int dstskip = info->d_skip; Uint32 ckey = info->src->colorkey; Uint8 *palmap = info->table; int c; /* Set up some basic variables */ srcskip += width-(width+7)/8; while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( bit != ckey ) { memcpy(dst, &palmap[bit*4], 3); } byte <<= 1; dst += 3; } src += srcskip; dst += dstskip; } } static void BlitBto4Key(SDL_BlitInfo *info) { int width = info->d_width; int height = info->d_height; Uint8 *src = info->s_pixels; Uint32 *dstp = (Uint32 *)info->d_pixels; int srcskip = info->s_skip; int dstskip = info->d_skip; Uint32 ckey = info->src->colorkey; Uint8 *palmap = info->table; int c; /* Set up some basic variables */ srcskip += width-(width+7)/8; dstskip /= 4; while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( bit != ckey ) { *dstp=((Uint32 *)palmap)[bit]; } byte <<= 1; dstp++; } src += srcskip; dstp += dstskip; } } static void BlitBtoNAlpha(SDL_BlitInfo *info) { int width = info->d_width; int height = info->d_height; Uint8 *src = info->s_pixels; Uint8 *dst = info->d_pixels; int srcskip = info->s_skip; int dstskip = info->d_skip; const SDL_Color *srcpal = info->src->palette->colors; SDL_PixelFormat *dstfmt = info->dst; int dstbpp; int c; const int A = info->src->alpha; /* Set up some basic variables */ dstbpp = dstfmt->BytesPerPixel; srcskip += width-(width+7)/8; while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( 1 ) { Uint32 pixel; unsigned sR, sG, sB; unsigned dR, dG, dB; sR = srcpal[bit].r; sG = srcpal[bit].g; sB = srcpal[bit].b; DISEMBLE_RGB(dst, dstbpp, dstfmt, pixel, dR, dG, dB); ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); } byte <<= 1; dst += dstbpp; } src += srcskip; dst += dstskip; } } static void BlitBtoNAlphaKey(SDL_BlitInfo *info) { int width = info->d_width; int height = info->d_height; Uint8 *src = info->s_pixels; Uint8 *dst = info->d_pixels; int srcskip = info->s_skip; int dstskip = info->d_skip; SDL_PixelFormat *srcfmt = info->src; SDL_PixelFormat *dstfmt = info->dst; const SDL_Color *srcpal = srcfmt->palette->colors; int dstbpp; int c; const int A = srcfmt->alpha; Uint32 ckey = srcfmt->colorkey; /* Set up some basic variables */ dstbpp = dstfmt->BytesPerPixel; srcskip += width-(width+7)/8; while ( height-- ) { Uint8 byte = 0, bit; for ( c=0; c<width; ++c ) { if ( (c&7) == 0 ) { byte = *src++; } bit = (byte&0x80)>>7; if ( bit != ckey ) { int sR, sG, sB; int dR, dG, dB; Uint32 pixel; sR = srcpal[bit].r; sG = srcpal[bit].g; sB = srcpal[bit].b; DISEMBLE_RGB(dst, dstbpp, dstfmt, pixel, dR, dG, dB); ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); } byte <<= 1; dst += dstbpp; } src += srcskip; dst += dstskip; } } static SDL_loblit bitmap_blit[] = { NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 }; static SDL_loblit colorkey_blit[] = { NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key }; SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int blit_index) { int which; if ( surface->map->dst->format->BitsPerPixel < 8 ) { which = 0; } else { which = surface->map->dst->format->BytesPerPixel; } switch(blit_index) { case 0: /* copy */ return bitmap_blit[which]; case 1: /* colorkey */ return colorkey_blit[which]; case 2: /* alpha */ return which >= 2 ? BlitBtoNAlpha : NULL; case 4: /* alpha + colorkey */ return which >= 2 ? BlitBtoNAlphaKey : NULL; } return NULL; }