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view src/video/cybergfx/SDL_cgxaccel.c @ 3844:332a59e39ce1 SDL-ryan-multiple-audio-device

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I really don't want to update these last two audio backends...I added an error that says if no one complains, the backends will be removed eventually. So if anyone ever wants them and they care enough to speak up, we'll know to do something about it. If no one does, that's less code to maintain. :)
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 17 Oct 2006 06:45:17 +0000
parents c121d94672cb
children
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    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

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#include "SDL_endian.h"
#include "SDL_video.h"
#include "../SDL_sysvideo.h"
#include "../SDL_blit.h"
#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!

#if defined(__SASC) || defined(__PPC__) || defined(MORPHOS)
#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);
}

void
BBRP(struct BitMap *a, WORD b, WORD c, struct RastPort *d, WORD e, WORD f,
     WORD g, WORD h, UBYTE i)
{
    BltBitMapRastPort(a, b, c, d, e, f, g, h, i);
}

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)
{
    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)
            SDL_free(surface->hwdata->mask);

        if (surface->hwdata->mask =
            SDL_malloc(RASSIZE(surface->w, surface->h))) {
            Uint32 pitch, ok = 0;
            APTR lock;

            SDL_memset(surface->hwdata->mask, 255,
                       RASSIZE(surface->w, surface->h));

            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));

            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..."));
                    SDL_free(surface->hwdata->mask);
                    surface->hwdata->mask = NULL;
                    ok = -1;
                }
                UnLockBitMap(lock);
                D(bug("...Colorkey built!\n"));
                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);

    return 0;
}

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);
    }
    return 0;
}

/* vi: set ts=4 sw=4 expandtab: */