bool bitmap_resize(struct bitmap *img, HermesHandle hermes_h,
HermesFormat *fmt, int nw, int nh)
{
unsigned int state = 0;
short bpp = bitmap_get_bpp( img );
int stride = bitmap_get_rowstride( img );
int err;
if( img->resized != NULL ) {
if( img->resized->width != nw || img->resized->height != nh ) {
bitmap_destroy( img->resized );
img->resized = NULL;
} else {
/* the bitmap is already resized */
return(true);
}
}
/* allocate the mem for resized bitmap */
if (img->opaque == true) {
state |= BITMAP_OPAQUE;
}
img->resized = bitmap_create_ex( nw, nh, bpp, nw*bpp, state, NULL );
if( img->resized == NULL ) {
printf("W: %d, H: %d, bpp: %d\n", nw, nh, bpp);
assert(img->resized);
return(false);
}
/* allocate an converter, only for resizing */
err = Hermes_ConverterRequest( hermes_h,
fmt,
fmt
);
if( err == 0 ) {
return(false);
}
err = Hermes_ConverterCopy( hermes_h,
img->pixdata,
0, /* x src coord of top left in pixel coords */
0, /* y src coord of top left in pixel coords */
bitmap_get_width( img ), bitmap_get_height( img ),
stride, /* stride as bytes */
img->resized->pixdata,
0, /* x dst coord of top left in pixel coords */
0, /* y dst coord of top left in pixel coords */
nw, nh,
bitmap_get_rowstride(img->resized) /* stride as bytes */
);
if( err == 0 ) {
bitmap_destroy( img->resized );
img->resized = NULL;
return(false);
}
return(true);
}
void *bitmap_create(int w, int h, unsigned int state)
{
return bitmap_create_ex( w, h, NS_BMP_DEFAULT_BPP, w * NS_BMP_DEFAULT_BPP, state, NULL );
}
