About the mask

Hello, Soplik depending on how you define it. If you unlock the sprite pin in advance, you can speed it up a lot. and if you display the sprite according to location, taking from the sign “by mask” or “not by mask" it might become slower. actually it makes sense if the sprites are large enough and the places are not in the mask more than "by mask"

Hello, All How much can you speed up? if you determine in advance which familiar places are displayed by the mask, and which ones just like that? Thank you.

Hello Sinus Fighting games, that is. And racing - if only racing were written for Spec. Oh, and you can’t display it horizontally pixel by pixel.

Hello, Soplik Regular output: ;hl->de spr: ld c,height push de ld b,width row: call putzn inc e jr z,$+6 ld a,d sub 8 ld d,a djnz row pop de call d_de_zn dec c jr nz,spr optimized: ld a,(hl) inc hl exx ldc,a ld b,8 exx ld c,height spr: push de ld b,width row: exx rr c djnz$+9 exx ld a,(hl) inc hl exx ldc,a ld b,8 exx call nc,put_zn call c,put_zn_msk inc e jr z,$+6 ld a,d sub 8 ld d,a djnz row pop de call d_de_zn dec c jr nz,spr put_zn: dup 8 ld a,(hl) ld(de),a inc hl inc d edup ret put_zn_msk: dup 8 ld a,(de) and (hl) inc hl or(hl) ld(de),a inc hl inc d edup ret Please don't blame me if I messed up somewhere or didn't optimize it, it was written on the fly. I think the general principle of working with a bit mask is clear %)