view src/video/SDL_blit_0.c @ 1135:cf6133247d34

Mac Classic and CodeWarrior patches. --ryan. From: =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb@algonet.se> Subject: Re: [SDL] Updated Mac patch Date: Tue, 6 Sep 2005 15:21:27 +0200 To: A list for developers using the SDL library <sdl@libsdl.org> Earlier, I wrote: > Updated the previous Mac patch to disable Carbon by default. > Also "fixed" the SDL.spec again, so that it builds on Darwin. > > http://www.algonet.se/~afb/SDL-1.2.9-mac.patch > Also applied fine to SDL12 CVS, when I tried it. > > Haven't completed any new packaging or projects for Xcode/PB, > but it seems to build and install fine here (in development). Tested the new patch to build with old CodeWarrior and MPW, and it seems it needed some hacks with those old headers... Just in case you want to support the archeological versions - here is a small add-on to the above patch, to fix those... http://www.algonet.se/~afb/SDL-1.2.9-classic.patch I couldn't get the old CW5 projects to build without a few modifications - such as deleting the stray old header in: "CWprojects/Support/Carbon/Include/ConditionalMacros.h" ? But I updated both projects to CW6 too and built for Carbon, and it ran all of the Mac test projects without any problems. The MPW file seems to have compiled, with a small order change. As long as you're still shipping the CWProjects and MPWmake with the download, they should probably be updated/fixed ? (another "solution" would of course be to just delete them) I'll post my new projects along with the new Xcode projects later on, along with XML exports of the various .mcp files. (CW5 builds for Classic / "PPC", and CW6 builds for Carbon) It'll be packaged as a part of the next SpriteWorld X release... http://spriteworldx.sourceforge.net/ [Classic/Carbon/Win/X11] --anders
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 08 Sep 2005 06:34:28 +0000
parents e6c91fd1911e
children c9b51268668f
line wrap: on
line source

/*
    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->format->BitsPerPixel != 1 ) {
		/* We don't support sub 8-bit packed pixel modes */
		return NULL;
	}
	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;
}