Mercurial > sdl-ios-xcode
view src/video/SDL_blit_0.c @ 855:aa4ac9e65d92
I noticed MacOSX SDL sets up working directory to parent of executable.
On BeOS is should setup it the same way, but it only does when Tracker
wasn't restarted.
I checked code and it looks like a hack to me :(
It looks for env variable and than comapres it to default when OpenTracker
was started after boot, and wasn't restarted. That's probably ok, for that
exact case. Unfortunetly that variable isn't always like that. For
example, after Tracker crashes and is restarted, env variable most
probably is different (depends on how Tracker was restarted, by what
application, etc... for example: i have launcher application from which i
can restart Tracker, and after that nev variable points to that
application's directory, not Tracker's).
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Tue, 24 Feb 2004 18:58:40 +0000 |
parents | b8d311d90021 |
children | e9d23bb80140 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 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; }