void switchmode(void)
{
uint32_t saved;
SDL_Surface *tmp = NULL;
SDL_Surface *oldscreen;
vgageti(0, 0, (uint8_t *)&tmp, 80, 200);
oldscreen = screen;
saved = addflag;
if(addflag == 0)
addflag = SDL_FULLSCREEN;
else
addflag = 0;
if(setmode() == false) {
addflag = saved;
if(setmode() == false) {
fprintf(stderr, "Fatal: failed to change videomode and"\
"fallback mode failed as well. Exitting.\n");
exit(1);
}
}
SDL_SetColors(screen, tmp->format->palette->colors, 0, \
tmp->format->palette->ncolors);
vgaputi(0, 0, (uint8_t *)&tmp, 80, 200);
SDL_FreeSurface(tmp);
SDL_FreeSurface(oldscreen);
}
void vgaputim(int16_t x, int16_t y, int16_t ch, int16_t w, int16_t h)
{
SDL_Surface *tmp;
SDL_Surface *mask;
SDL_Surface *scr = NULL;
uint8_t *tmp_pxl, *mask_pxl, *scr_pxl;
int16_t realsize;
int16_t i;
tmp = ch2bmap(sprites[ch*2], w, h);
mask = ch2bmap(sprites[ch*2+1], w, h);
vgageti(x, y, (uint8_t *)&scr, w, h);
realsize = scr->w * scr->h;
tmp_pxl = (uint8_t *)tmp->pixels;
mask_pxl = (uint8_t *)mask->pixels;
scr_pxl = (uint8_t *)scr->pixels;
for(i=0;i<realsize;i++)
if(tmp_pxl[i] != 0xff)
scr_pxl[i] = (scr_pxl[i] & mask_pxl[i]) | \
tmp_pxl[i];
vgaputi(x, y, (uint8_t *)&scr, w, h);
tmp->pixels = NULL; /* We should NULL'ify these ppointers, or the VGLBitmapDestroy */
mask->pixels = NULL; /* will shoot itself in the foot by trying to dellocate statically */
SDL_FreeSurface(tmp);/* allocated arrays */
SDL_FreeSurface(mask);
SDL_FreeSurface(scr);
}
void
vgaputim(int16_t x, int16_t y, int16_t ch, int16_t w, int16_t h)
{
VGLBitmap *tmp;
VGLBitmap *mask;
VGLBitmap *scr = NULL;
int16_t realsize;
int16_t i;
tmp = ch2bmap(sprites[ch * 2], w, h);
mask = ch2bmap(sprites[ch * 2 + 1], w, h);
vgageti(x, y, (uint8_t *) & scr, w, h);
realsize = scr->Xsize * scr->Ysize;
for (i = 0; i < realsize; i++)
if (tmp->Bitmap[i] != 0xff)
scr->Bitmap[i] = (scr->Bitmap[i] & mask->Bitmap[i]) | \
tmp->Bitmap[i];
vgaputi(x, y, (uint8_t *) & scr, w, h);
tmp->Bitmap = NULL; /* We should NULL'ify these ppointers, or the
* VGLBitmapDestroy */
mask->Bitmap = NULL; /* will shoot itself in the foot by trying to
* dellocate statically */
VGLBitmapDestroy(tmp); /* allocated arrays */
VGLBitmapDestroy(mask);
VGLBitmapDestroy(scr);
}
void vgatitle(void)
{
SDL_Surface *tmp=NULL;
vgageti(0, 0, (uint8_t *)&tmp, 80, 200);
gettitle(tmp->pixels);
vgaputi(0, 0, (uint8_t *)&tmp, 80, 200);
SDL_FreeSurface(tmp);
}
void vgaclear(void)
{
SDL_Surface *tmp = NULL;
vgageti(0, 0, (uint8_t *)&tmp, 80, 200);
memset(tmp->pixels, 0x00, tmp->w*tmp->h);
vgaputi(0, 0, (uint8_t *)&tmp, 80, 200);
SDL_FreeSurface(tmp);
}
void vgatitle(void)
{
SDL_Surface *tmp=NULL;
vgageti(0, 0, (Uint3 *)&tmp, 80, 200);
gettitle((unsigned char*)tmp->pixels);
vgaputi(0, 0, (Uint3 *)&tmp, 80, 200);
SDL_FreeSurface(tmp);
}
void
vgatitle(void)
{
VGLBitmap *tmp = NULL;
vgageti(0, 0, (uint8_t *) & tmp, 80, 200);
gettitle(tmp->Bitmap);
vgaputi(0, 0, (uint8_t *) & tmp, 80, 200);
VGLBitmapDestroy(tmp);
}
int16_t
vgagetpix(int16_t x, int16_t y)
{
VGLBitmap *tmp = NULL;
uint16_t xi, yi;
uint16_t i = 0;
int16_t rval = 0;
if ((x > 319) || (y > 199))
return (0xff);
vgageti(x, y, (uint8_t *) & tmp, 1, 1);
for (yi = 0; yi < tmp->Ysize; yi++)
for (xi = 0; xi < tmp->Xsize; xi++)
if (tmp->Bitmap[i++])
rval |= 0x80 >> xi;
VGLBitmapDestroy(tmp);
return (rval & 0xee);
}
int16_t vgagetpix(int16_t x, int16_t y)
{
SDL_Surface *tmp = NULL;
uint16_t xi,yi;
uint16_t i = 0;
int16_t rval = 0;
uint8_t *pixels;
if ((x > 319) || (y > 199))
return (0xff);
vgageti(x, y, (uint8_t *)&tmp, 1, 1);
pixels = (uint8_t *)tmp->pixels;
for (yi=0;yi<tmp->h;yi++)
for (xi=0;xi<tmp->w;xi++)
if (pixels[i++])
rval |= 0x80 >> xi;
SDL_FreeSurface(tmp);
return(rval & 0xee);
}
Sint4 vgagetpix(Sint4 x, Sint4 y)
{
SDL_Surface *tmp = NULL;
Uint4 xi,yi;
Uint4 i = 0;
Sint4 rval = 0;
Uint8 *pixels;
if ((x > 319) || (y > 199))
return (0xff);
vgageti(x, y, (Uint3 *)&tmp, 1, 1);
pixels = (Uint8 *)tmp->pixels;
for (yi=0;yi<tmp->h;yi++)
for (xi=0;xi<tmp->w;xi++)
if (pixels[i++])
rval |= 0x80 >> xi;
SDL_FreeSurface(tmp);
return(rval & 0xee);
}
