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Date: Sun, 3 Aug 2003 22:07:57 +0200 From: Max Horn Subject: SDL OSX fullscreen FIX the attached patch fixes the fullscreen problems on SDL/OSX. The cause was that click events are bounded by winRect. Now, winRect is set to the size of the video surface. But if you e.g. request a 640x420 surface, you might get a 640x480 "real" surface. Still, SDL_VideoSurface->h will be set to 420! Thus, the upper 60 pixels in my example received no mouse down events. My fix simply disables this clipping when in full screen mode - after all, all clicks then should be inside the screen surface. Higher SDL functions ensure that the coordinates then are clipped to 640x420. It works fine in all my tests here. I don't know if it's the right thing to do in multi screen scenarios, though.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 04 Aug 2003 01:00:30 +0000
parents f6ffac90895c
children b8d311d90021
line wrap: on
line source

/*
    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 "SDL_types.h"
#include "SDL_video.h"
#include "SDL_blit.h"
#include "SDL_sysvideo.h"
#include "SDL_endian.h"

/* Functions to blit from 8-bit surfaces to other surfaces */

static void Blit1to1(SDL_BlitInfo *info)
{
#ifndef USE_DUFFS_LOOP
	int c;
#endif
	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;

	while ( height-- ) {
#ifdef USE_DUFFS_LOOP
		DUFFS_LOOP(
			{
			  *dst = map[*src];
			}
			dst++;
			src++;
		, width);
#else
		for ( c=width; c; --c ) {
		        *dst = map[*src];
			dst++;
			src++;
		}
#endif
		src += srcskip;
		dst += dstskip;
	}
}
/* This is now endian dependent */
#if ( SDL_BYTEORDER == SDL_LIL_ENDIAN )
#define HI	1
#define LO	0
#else /* ( SDL_BYTEORDER == SDL_BIG_ENDIAN ) */
#define HI	0
#define LO	1
#endif
static void Blit1to2(SDL_BlitInfo *info)
{
#ifndef USE_DUFFS_LOOP
	int c;
#endif
	int width, height;
	Uint8 *src, *dst;
	Uint16 *map;
	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 = (Uint16 *)info->table;

#ifdef USE_DUFFS_LOOP
	while ( height-- ) {
		DUFFS_LOOP(
		{
			*(Uint16 *)dst = map[*src++];
			dst += 2;
		},
		width);
		src += srcskip;
		dst += dstskip;
	}
#else
	/* Memory align at 4-byte boundary, if necessary */
	if ( (long)dst & 0x03 ) {
		/* Don't do anything if width is 0 */
		if ( width == 0 ) {
			return;
		}
		--width;

		while ( height-- ) {
			/* Perform copy alignment */
			*(Uint16 *)dst = map[*src++];
			dst += 2;

			/* Copy in 4 pixel chunks */
			for ( c=width/4; c; --c ) {
				*(Uint32 *)dst =
					(map[src[HI]]<<16)|(map[src[LO]]);
				src += 2;
				dst += 4;
				*(Uint32 *)dst =
					(map[src[HI]]<<16)|(map[src[LO]]);
				src += 2;
				dst += 4;
			}
			/* Get any leftovers */
			switch (width & 3) {
				case 3:
					*(Uint16 *)dst = map[*src++];
					dst += 2;
				case 2:
					*(Uint32 *)dst =
					  (map[src[HI]]<<16)|(map[src[LO]]);
					src += 2;
					dst += 4;
					break;
				case 1:
					*(Uint16 *)dst = map[*src++];
					dst += 2;
					break;
			}
			src += srcskip;
			dst += dstskip;
		}
	} else { 
		while ( height-- ) {
			/* Copy in 4 pixel chunks */
			for ( c=width/4; c; --c ) {
				*(Uint32 *)dst =
					(map[src[HI]]<<16)|(map[src[LO]]);
				src += 2;
				dst += 4;
				*(Uint32 *)dst =
					(map[src[HI]]<<16)|(map[src[LO]]);
				src += 2;
				dst += 4;
			}
			/* Get any leftovers */
			switch (width & 3) {
				case 3:
					*(Uint16 *)dst = map[*src++];
					dst += 2;
				case 2:
					*(Uint32 *)dst =
					  (map[src[HI]]<<16)|(map[src[LO]]);
					src += 2;
					dst += 4;
					break;
				case 1:
					*(Uint16 *)dst = map[*src++];
					dst += 2;
					break;
			}
			src += srcskip;
			dst += dstskip;
		}
	}
#endif /* USE_DUFFS_LOOP */
}
static void Blit1to3(SDL_BlitInfo *info)
{
#ifndef USE_DUFFS_LOOP
	int c;
#endif
	int 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;

	while ( height-- ) {
#ifdef USE_DUFFS_LOOP
		DUFFS_LOOP(
			{
				o = *src * 4;
				dst[0] = map[o++];
				dst[1] = map[o++];
				dst[2] = map[o++];
			}
			src++;
			dst += 3;
		, width);
#else
		for ( c=width; c; --c ) {
			o = *src * 4;
			dst[0] = map[o++];
			dst[1] = map[o++];
			dst[2] = map[o++];
			src++;
			dst += 3;
		}
#endif /* USE_DUFFS_LOOP */
		src += srcskip;
		dst += dstskip;
	}
}
static void Blit1to4(SDL_BlitInfo *info)
{
#ifndef USE_DUFFS_LOOP
	int c;
#endif
	int width, height;
	Uint8 *src;
	Uint32 *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 = (Uint32 *)info->d_pixels;
	dstskip = info->d_skip/4;
	map = (Uint32 *)info->table;

	while ( height-- ) {
#ifdef USE_DUFFS_LOOP
		DUFFS_LOOP(
			*dst++ = map[*src++];
		, width);
#else
		for ( c=width/4; c; --c ) {
			*dst++ = map[*src++];
			*dst++ = map[*src++];
			*dst++ = map[*src++];
			*dst++ = map[*src++];
		}
		switch ( width & 3 ) {
			case 3:
				*dst++ = map[*src++];
			case 2:
				*dst++ = map[*src++];
			case 1:
				*dst++ = map[*src++];
		}
#endif /* USE_DUFFS_LOOP */
		src += srcskip;
		dst += dstskip;
	}
}

static void Blit1to1Key(SDL_BlitInfo *info)
{
	int width = info->d_width;
	int height = info->d_height;
	Uint8 *src = info->s_pixels;
	int srcskip = info->s_skip;
	Uint8 *dst = info->d_pixels;
	int dstskip = info->d_skip;
	Uint8 *palmap = info->table;
	Uint32 ckey = info->src->colorkey;
        
	if ( palmap ) {
		while ( height-- ) {
			DUFFS_LOOP(
			{
				if ( *src != ckey ) {
				  *dst = palmap[*src];
				}
				dst++;
				src++;
			},
			width);
			src += srcskip;
			dst += dstskip;
		}
	} else {
		while ( height-- ) {
			DUFFS_LOOP(
			{
				if ( *src != ckey ) {
				  *dst = *src;
				}
				dst++;
				src++;
			},
			width);
			src += srcskip;
			dst += dstskip;
		}
	}
}

static void Blit1to2Key(SDL_BlitInfo *info)
{
	int width = info->d_width;
	int height = info->d_height;
	Uint8 *src = info->s_pixels;
	int srcskip = info->s_skip;
	Uint16 *dstp = (Uint16 *)info->d_pixels;
	int dstskip = info->d_skip;
	Uint16 *palmap = (Uint16 *)info->table;
	Uint32 ckey = info->src->colorkey;

	/* Set up some basic variables */
	dstskip /= 2;

	while ( height-- ) {
		DUFFS_LOOP(
		{
			if ( *src != ckey ) {
				*dstp=palmap[*src];
			}
			src++;
			dstp++;
		},
		width);
		src += srcskip;
		dstp += dstskip;
	}
}

static void Blit1to3Key(SDL_BlitInfo *info)
{
	int width = info->d_width;
	int height = info->d_height;
	Uint8 *src = info->s_pixels;
	int srcskip = info->s_skip;
	Uint8 *dst = info->d_pixels;
	int dstskip = info->d_skip;
	Uint8 *palmap = info->table;
	Uint32 ckey = info->src->colorkey;
	int o;

	while ( height-- ) {
		DUFFS_LOOP(
		{
			if ( *src != ckey ) {
				o = *src * 4;
				dst[0] = palmap[o++];
				dst[1] = palmap[o++];
				dst[2] = palmap[o++];
			}
			src++;
			dst += 3;
		},
		width);
		src += srcskip;
		dst += dstskip;
	}
}

static void Blit1to4Key(SDL_BlitInfo *info)
{
	int width = info->d_width;
	int height = info->d_height;
	Uint8 *src = info->s_pixels;
	int srcskip = info->s_skip;
	Uint32 *dstp = (Uint32 *)info->d_pixels;
	int dstskip = info->d_skip;
	Uint32 *palmap = (Uint32 *)info->table;
	Uint32 ckey = info->src->colorkey;

	/* Set up some basic variables */
	dstskip /= 4;

	while ( height-- ) {
		DUFFS_LOOP(
		{
			if ( *src != ckey ) {
				*dstp = palmap[*src];
			}
			src++;
			dstp++;
		},
		width);
		src += srcskip;
		dstp += dstskip;
	}
}

static void Blit1toNAlpha(SDL_BlitInfo *info)
{
	int width = info->d_width;
	int height = info->d_height;
	Uint8 *src = info->s_pixels;
	int srcskip = info->s_skip;
	Uint8 *dst = info->d_pixels;
	int dstskip = info->d_skip;
	SDL_PixelFormat *dstfmt = info->dst;
	const SDL_Color *srcpal	= info->src->palette->colors;
	int dstbpp;
	const int A = info->src->alpha;

	/* Set up some basic variables */
	dstbpp = dstfmt->BytesPerPixel;

	while ( height-- ) {
	        int sR, sG, sB;
		int dR, dG, dB;
	    	DUFFS_LOOP4(
			{
			        Uint32 pixel;
				sR = srcpal[*src].r;
				sG = srcpal[*src].g;
				sB = srcpal[*src].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);
				src++;
				dst += dstbpp;
			},
			width);
		src += srcskip;
		dst += dstskip;
	}
}

static void Blit1toNAlphaKey(SDL_BlitInfo *info)
{
	int width = info->d_width;
	int height = info->d_height;
	Uint8 *src = info->s_pixels;
	int srcskip = info->s_skip;
	Uint8 *dst = info->d_pixels;
	int dstskip = info->d_skip;
	SDL_PixelFormat *srcfmt = info->src;
	SDL_PixelFormat *dstfmt = info->dst;
	const SDL_Color *srcpal	= info->src->palette->colors;
	Uint32 ckey = srcfmt->colorkey;
	int dstbpp;
	const int A = srcfmt->alpha;

	/* Set up some basic variables */
	dstbpp = dstfmt->BytesPerPixel;

	while ( height-- ) {
	        int sR, sG, sB;
		int dR, dG, dB;
		DUFFS_LOOP(
		{
			if ( *src != ckey ) {
			        Uint32 pixel;
				sR = srcpal[*src].r;
				sG = srcpal[*src].g;
				sB = srcpal[*src].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);
			}
			src++;
			dst += dstbpp;
		},
		width);
		src += srcskip;
		dst += dstskip;
	}
}

static SDL_loblit one_blit[] = {
	NULL, Blit1to1, Blit1to2, Blit1to3, Blit1to4
};

static SDL_loblit one_blitkey[] = {
        NULL, Blit1to1Key, Blit1to2Key, Blit1to3Key, Blit1to4Key
};

SDL_loblit SDL_CalculateBlit1(SDL_Surface *surface, int blit_index)
{
	int which;
	SDL_PixelFormat *dstfmt;

	dstfmt = surface->map->dst->format;
	if ( dstfmt->BitsPerPixel < 8 ) {
		which = 0;
	} else {
		which = dstfmt->BytesPerPixel;
	}
	switch(blit_index) {
	case 0:			/* copy */
	    return one_blit[which];

	case 1:			/* colorkey */
	    return one_blitkey[which];

	case 2:			/* alpha */
	    /* Supporting 8bpp->8bpp alpha is doable but requires lots of
	       tables which consume space and takes time to precompute,
	       so is better left to the user */
	    return which >= 2 ? Blit1toNAlpha : NULL;

	case 3:			/* alpha + colorkey */
	    return which >= 2 ? Blit1toNAlphaKey : NULL;

	}
	return NULL;
}