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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"
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static int CGX_HWAccelBlit(SDL_Surface * src, SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect);
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// 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
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BMKBRP(struct BitMap *a, WORD b, WORD c, struct RastPort *d, WORD e, WORD f,
WORD g, WORD h, UBYTE i, APTR j)
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BltMaskBitMapRastPort(a, b, c, d, e, f, g, h, i, j);
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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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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);
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#endif
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CGX_SetHWColorKey(_THIS, SDL_Surface * surface, Uint32 key)
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if (surface->hwdata) {
if (surface->hwdata->mask)
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SDL_free(surface->hwdata->mask);
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if (surface->hwdata->mask =
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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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LockBitMapTags(surface->hwdata->bmap, LBMI_BASEADDRESS,
(ULONG) & surface->pixels,
LBMI_BYTESPERROW, (ULONG) & pitch, TAG_DONE)) {
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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:
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D(bug("Pixel mode non supported for color key..."));
SDL_free(surface->hwdata->mask);
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surface->hwdata->mask = NULL;
ok = -1;
}
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UnLockBitMap(lock);
D(bug("...Colorkey built!\n"));
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return ok;
}
}
}
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D(bug("HW colorkey not supported for this depth\n"));
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}
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CGX_CheckHWBlit(_THIS, SDL_Surface * src, SDL_Surface * dst)
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{
// Doesn't support yet alpha blitting
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if (src->hwdata && !(src->flags & (SDL_SRCALPHA))) {
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D(bug("CheckHW blit... OK!\n"));
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if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
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if (CGX_SetHWColorKey(this, src, src->format->colorkey) < 0) {
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src->flags &= ~SDL_HWACCEL;
return -1;
}
}
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src->flags |= SDL_HWACCEL;
src->map->hw_blit = CGX_HWAccelBlit;
return 1;
} else
src->flags &= ~SDL_HWACCEL;
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D(bug("CheckHW blit... NO!\n"));
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}
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static int temprp_init = 0;
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static struct RastPort temprp;
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CGX_HWAccelBlit(SDL_Surface * src, SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect)
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{
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struct SDL_VideoDevice *this = src->hwdata->videodata;
// D(bug("Accel blit!\n"));
if (src->flags & SDL_SRCCOLORKEY && src->hwdata->mask) {
if (dst == SDL_VideoSurface) {
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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);
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} else if (dst->hwdata) {
if (!temprp_init) {
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InitRastPort(&temprp);
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temprp_init = 1;
}
temprp.BitMap = (struct BitMap *) dst->hwdata->bmap;
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BMKBRP(src->hwdata->bmap, srcrect->x, srcrect->y,
&temprp, dstrect->x, dstrect->y,
srcrect->w, srcrect->h, 0xc0, src->hwdata->mask);
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}
} else if (dst == SDL_VideoSurface) {
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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);
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} else if (dst->hwdata)
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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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}
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CGX_FillHWRect(_THIS, SDL_Surface * dst, SDL_Rect * dstrect, Uint32 color)
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{
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if (dst == SDL_VideoSurface) {
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FillPixelArray(SDL_RastPort, dstrect->x + SDL_Window->BorderLeft,
dstrect->y + SDL_Window->BorderTop, dstrect->w,
dstrect->h, color);
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} else if (dst->hwdata) {
if (!temprp_init) {
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InitRastPort(&temprp);
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temprp_init = 1;
}
temprp.BitMap = (struct BitMap *) dst->hwdata->bmap;
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FillPixelArray(&temprp, dstrect->x, dstrect->y, dstrect->w,
dstrect->h, color);
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}
return 0;
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}
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/* vi: set ts=4 sw=4 expandtab: */