void scale_bitmap_asm(grs_bitmap *source_bmp, grs_bitmap *dest_bmp, int x0, int y0, int x1, int y1, fix u0, fix v0, fix u1, fix v1 )
{
fix du, dv, v;
int y;
du = (u1-u0) / (x1-x0);
dv = (v1-v0) / (y1-y0);
v = v0;
for (y=y0; y<=y1; y++ ) {
scale_row_asm_transparent( &source_bmp->bm_data[source_bmp->bm_rowsize*f2i(v)], &dest_bmp->bm_data[dest_bmp->bm_rowsize*y+x0], x1-x0+1, u0, du );
v += dv;
}
}
void scale_bitmap_asm_rle(grs_bitmap *source_bmp, grs_bitmap *dest_bmp, int x0, int y0, int x1, int y1, fix u0, fix v0, fix u1, fix v1 )
{
fix du, dv, v;
int y, last_row=-1;
du = (u1-u0) / (x1-x0);
dv = (v1-v0) / (y1-y0);
v = v0;
for (y=y0; y<=y1; y++ ) {
if ( f2i(v) != last_row ) {
last_row = f2i(v);
decode_row( source_bmp, last_row );
}
scale_row_asm_transparent( scale_rle_data, &dest_bmp->bm_data[dest_bmp->bm_rowsize*y+x0], x1-x0+1, u0, du );
v += dv;
}
}
void scale_bitmap_c_rle(grs_bitmap *source_bmp, grs_bitmap *dest_bmp, int x0, int y0, int x1, int y1, fix u0, fix v0, fix u1, fix v1, int orientation )
{
fix du, dv, v;
int y, last_row=-1;
// Rotation doesn't work because explosions are not square!
// -- if (orientation & 4) {
// -- int t;
// -- t = u0; u0 = v0; v0 = t;
// -- t = u1; u1 = v1; v1 = t;
// -- }
du = (u1-u0) / (x1-x0);
dv = (v1-v0) / (y1-y0);
if (orientation & 1) {
u0 = u1;
du = -du;
}
if (orientation & 2) {
v0 = v1;
dv = -dv;
if (dv < 0)
v0--;
}
v = v0;
if (v<0) { //was: Assert(v >= 0);
//Int3(); //this should be checked in higher-level routine
return;
}
for (y=y0; y<=y1; y++ ) {
if ( f2i(v) != last_row ) {
last_row = f2i(v);
decode_row( source_bmp, last_row );
}
scale_row_asm_transparent( scale_rle_data, &dest_bmp->bm_texBuf[dest_bmp->bm_props.rowsize*y+x0], x1-x0+1, u0, du );
v += dv;
}
}