SDL_cgxaccel.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
slouken@libsdl.org
*/
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#include "SDL_config.h"
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#include "SDL_endian.h"
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#include "SDL_video.h"
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#include "../SDL_sysvideo.h"
#include "../SDL_blit.h"
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#include "SDL_cgxvideo.h"
static int CGX_HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
SDL_Surface *dst, SDL_Rect *dstrect);
// These are needed to avoid register troubles with gcc -O2!
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#if defined(__SASC) || defined(__PPC__) || defined(MORPHOS)
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#define BMKBRP(a,b,c,d,e,f,g,h,i,j) BltMaskBitMapRastPort(a,b,c,d,e,f,g,h,i,j)
#define BBRP(a,b,c,d,e,f,g,h,i) BltBitMapRastPort(a,b,c,d,e,f,g,h,i)
#define BBB(a,b,c,d,e,f,g,h,i,j,k) BltBitMap(a,b,c,d,e,f,g,h,i,j,k)
#else
void BMKBRP(struct BitMap *a,WORD b, WORD c,struct RastPort *d,WORD e,WORD f,WORD g,WORD h,UBYTE i,APTR j)
{BltMaskBitMapRastPort(a,b,c,d,e,f,g,h,i,j);}
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void BBRP(struct BitMap *a,WORD b, WORD c,struct RastPort *d,WORD e,WORD f,WORD g,WORD h,UBYTE i)
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{BltBitMapRastPort(a,b,c,d,e,f,g,h,i);}
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void BBB(struct BitMap *a,WORD b, WORD c,struct BitMap *d,WORD e,WORD f,WORD g,WORD h,UBYTE i,UBYTE j,UWORD *k)
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{BltBitMap(a,b,c,d,e,f,g,h,i,j,k);}
#endif
int CGX_SetHWColorKey(_THIS,SDL_Surface *surface, Uint32 key)
{
if(surface->hwdata)
{
if(surface->hwdata->mask)
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SDL_free(surface->hwdata->mask);
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if(surface->hwdata->mask=SDL_malloc(RASSIZE(surface->w,surface->h)))
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{
Uint32 pitch,ok=0;
APTR lock;
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SDL_memset(surface->hwdata->mask,255,RASSIZE(surface->w,surface->h));
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D(bug("Building colorkey mask: color: %ld, size: %ld x %ld, %ld bytes...Bpp:%ld\n",key,surface->w,surface->h,RASSIZE(surface->w,surface->h),surface->format->BytesPerPixel));
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if(lock=LockBitMapTags(surface->hwdata->bmap,LBMI_BASEADDRESS,(ULONG)&surface->pixels,
LBMI_BYTESPERROW,(ULONG)&pitch,TAG_DONE))
{
switch(surface->format->BytesPerPixel)
{
case 1:
{
unsigned char k=key;
register int i,j,t;
register unsigned char *dest=surface->hwdata->mask,*map=surface->pixels;
pitch-=surface->w;
for(i=0;i<surface->h;i++)
{
for(t=128,j=0;j<surface->w;j++)
{
if(*map==k)
*dest&=~t;
t>>=1;
if(t==0)
{
dest++;
t=128;
}
map++;
}
map+=pitch;
}
}
break;
case 2:
{
Uint16 k=key,*mapw;
register int i,j,t;
register unsigned char *dest=surface->hwdata->mask,*map=surface->pixels;
for(i=surface->h;i;--i)
{
mapw=(Uint16 *)map;
for(t=128,j=surface->w;j;--j)
{
if(*mapw==k)
*dest&=~t;
t>>=1;
if(t==0)
{
dest++;
t=128;
}
mapw++;
}
map+=pitch;
}
}
break;
case 4:
{
Uint32 *mapl;
register int i,j,t;
register unsigned char *dest=surface->hwdata->mask,*map=surface->pixels;
for(i=surface->h;i;--i)
{
mapl=(Uint32 *)map;
for(t=128,j=surface->w;j;--j)
{
if(*mapl==key)
*dest&=~t;
t>>=1;
if(t==0)
{
dest++;
t=128;
}
mapl++;
}
map+=pitch;
}
}
break;
default:
D(bug("Pixel mode non supported for color key..."));
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SDL_free(surface->hwdata->mask);
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surface->hwdata->mask=NULL;
ok=-1;
}
UnLockBitMap(lock);
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D(bug("...Colorkey built!\n"));
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return ok;
}
}
}
D(bug("HW colorkey not supported for this depth\n"));
return -1;
}
int CGX_CheckHWBlit(_THIS,SDL_Surface *src,SDL_Surface *dst)
{
// Doesn't support yet alpha blitting
if(src->hwdata&& !(src->flags & (SDL_SRCALPHA)))
{
D(bug("CheckHW blit... OK!\n"));
if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
if ( CGX_SetHWColorKey(this, src, src->format->colorkey) < 0 ) {
src->flags &= ~SDL_HWACCEL;
return -1;
}
}
src->flags|=SDL_HWACCEL;
src->map->hw_blit = CGX_HWAccelBlit;
return 1;
}
else
src->flags &= ~SDL_HWACCEL;
D(bug("CheckHW blit... NO!\n"));
return 0;
}
static int temprp_init=0;
static struct RastPort temprp;
static int CGX_HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
SDL_Surface *dst, SDL_Rect *dstrect)
{
struct SDL_VideoDevice *this=src->hwdata->videodata;
// D(bug("Accel blit!\n"));
if(src->flags&SDL_SRCCOLORKEY && src->hwdata->mask)
{
if(dst==SDL_VideoSurface)
{
BMKBRP(src->hwdata->bmap,srcrect->x,srcrect->y,
SDL_RastPort,dstrect->x+SDL_Window->BorderLeft,dstrect->y+SDL_Window->BorderTop,
srcrect->w,srcrect->h,0xc0,src->hwdata->mask);
}
else if(dst->hwdata)
{
if(!temprp_init)
{
InitRastPort(&temprp);
temprp_init=1;
}
temprp.BitMap=(struct BitMap *)dst->hwdata->bmap;
BMKBRP(src->hwdata->bmap,srcrect->x,srcrect->y,
&temprp,dstrect->x,dstrect->y,
srcrect->w,srcrect->h,0xc0,src->hwdata->mask);
}
}
else if(dst==SDL_VideoSurface)
{
BBRP(src->hwdata->bmap,srcrect->x,srcrect->y,SDL_RastPort,dstrect->x+SDL_Window->BorderLeft,dstrect->y+SDL_Window->BorderTop,srcrect->w,srcrect->h,0xc0);
}
else if(dst->hwdata)
BBB(src->hwdata->bmap,srcrect->x,srcrect->y,dst->hwdata->bmap,dstrect->x,dstrect->y,srcrect->w,srcrect->h,0xc0,0xff,NULL);
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return 0;
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}
int CGX_FillHWRect(_THIS,SDL_Surface *dst,SDL_Rect *dstrect,Uint32 color)
{
if(dst==SDL_VideoSurface)
{
FillPixelArray(SDL_RastPort,dstrect->x+SDL_Window->BorderLeft,dstrect->y+SDL_Window->BorderTop,dstrect->w,dstrect->h,color);
}
else if(dst->hwdata)
{
if(!temprp_init)
{
InitRastPort(&temprp);
temprp_init=1;
}
temprp.BitMap=(struct BitMap *)dst->hwdata->bmap;
FillPixelArray(&temprp,dstrect->x,dstrect->y,dstrect->w,dstrect->h,color);
}
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return 0;
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}