diff options
Diffstat (limited to 'home')
| -rw-r--r-- | home/overworld.asm | 76 | ||||
| -rw-r--r-- | home/vblank.asm | 2 | ||||
| -rw-r--r-- | home/vcopy.asm | 51 |
3 files changed, 66 insertions, 63 deletions
diff --git a/home/overworld.asm b/home/overworld.asm index 6b3a75c6..051d055e 100644 --- a/home/overworld.asm +++ b/home/overworld.asm @@ -555,10 +555,10 @@ CheckMapConnections:: ; 07ba (0:07ba) jr z,.savePointer1 .pointerAdjustmentLoop1 ld a,[wWestConnectedMapWidth] ; width of connected map - add a,$06 + add a,MAP_BORDER * 2 ld e,a - ld d,$00 - ld b,$00 + ld d,0 + ld b,0 add hl,de dec c jr nz,.pointerAdjustmentLoop1 @@ -591,10 +591,10 @@ CheckMapConnections:: ; 07ba (0:07ba) jr z,.savePointer2 .pointerAdjustmentLoop2 ld a,[wEastConnectedMapWidth] - add a,$06 + add a,MAP_BORDER * 2 ld e,a - ld d,$00 - ld b,$00 + ld d,0 + ld b,0 add hl,de dec c jr nz,.pointerAdjustmentLoop2 @@ -883,15 +883,15 @@ LoadTileBlockMap:: ; 09fc (0:09fc) ld hl,wOverworldMap ld a,[W_CURMAPWIDTH] ld [hMapWidth],a - add a,$06 ; border (east and west) + add a,MAP_BORDER * 2 ; east and west ld [hMapStride],a ; map width + border - ld b,$00 + ld b,0 ld c,a ; make space for north border (next 3 lines) add hl,bc add hl,bc add hl,bc - ld c,$03 + ld c,MAP_BORDER add hl,bc ; this puts us past the (west) border ld a,[W_MAPDATAPTR] ; tile map pointer ld e,a @@ -995,7 +995,7 @@ LoadTileBlockMap:: ; 09fc (0:09fc) ret LoadNorthSouthConnectionsTileMap:: ; 0ade (0:0ade) - ld c,$03 + ld c,MAP_BORDER .loop push de push hl @@ -1016,7 +1016,7 @@ LoadNorthSouthConnectionsTileMap:: ; 0ade (0:0ade) inc h .noCarry1 ld a,[W_CURMAPWIDTH] - add a,$06 + add a,MAP_BORDER * 2 add e ld e,a jr nc,.noCarry2 @@ -1029,7 +1029,7 @@ LoadNorthSouthConnectionsTileMap:: ; 0ade (0:0ade) LoadEastWestConnectionsTileMap:: ; 0b02 (0:0b02) push hl push de - ld c,$03 + ld c,MAP_BORDER .innerLoop ld a,[hli] ld [de],a @@ -1045,7 +1045,7 @@ LoadEastWestConnectionsTileMap:: ; 0b02 (0:0b02) inc h .noCarry1 ld a,[W_CURMAPWIDTH] - add a,$06 + add a,MAP_BORDER * 2 add e ld e,a jr nc,.noCarry2 @@ -1387,7 +1387,7 @@ LoadCurrentMapView:: ; 0caa (0:0caa) ; update tile block map pointer to next row's address pop de ld a,[W_CURMAPWIDTH] - add a,$06 + add a,MAP_BORDER * 2 add e ld e,a jr nc,.noCarry @@ -1418,7 +1418,7 @@ LoadCurrentMapView:: ; 0caa (0:0caa) ld bc,$0002 add hl,bc .copyToVisibleAreaBuffer - coord de, 0, 0 ; base address for the tiles that are directly transfered to VRAM during V-blank + coord de, 0, 0 ; base address for the tiles that are directly transferred to VRAM during V-blank ld b, SCREEN_HEIGHT .rowLoop2 ld c, SCREEN_WIDTH @@ -1662,7 +1662,7 @@ MoveTileBlockMapPointerWest:: ; 0e6f (0:0e6f) ret MoveTileBlockMapPointerSouth:: ; 0e79 (0:0e79) - add a,$06 + add a,MAP_BORDER * 2 ld b,a ld a,[de] add b @@ -1675,7 +1675,7 @@ MoveTileBlockMapPointerSouth:: ; 0e79 (0:0e79) ret MoveTileBlockMapPointerNorth:: ; 0e85 (0:0e85) - add a,$06 + add a,MAP_BORDER * 2 ld b,a ld a,[de] sub b @@ -1692,17 +1692,17 @@ MoveTileBlockMapPointerNorth:: ; 0e85 (0:0e85) ScheduleNorthRowRedraw:: ; 0e91 (0:0e91) coord hl, 0, 0 - call CopyToScreenEdgeTiles + call CopyToRedrawRowOrColumnSrcTiles ld a,[wMapViewVRAMPointer] - ld [H_SCREENEDGEREDRAWADDR],a + ld [hRedrawRowOrColumnDest],a ld a,[wMapViewVRAMPointer + 1] - ld [H_SCREENEDGEREDRAWADDR + 1],a - ld a,REDRAWROW - ld [H_SCREENEDGEREDRAW],a + ld [hRedrawRowOrColumnDest + 1],a + ld a,REDRAW_ROW + ld [hRedrawRowOrColumnMode],a ret -CopyToScreenEdgeTiles:: ; 0ea6 (0:0ea6) - ld de,wScreenEdgeTiles +CopyToRedrawRowOrColumnSrcTiles:: ; 0ea6 (0:0ea6) + ld de,wRedrawRowOrColumnSrcTiles ld c,2 * SCREEN_WIDTH .loop ld a,[hli] @@ -1714,7 +1714,7 @@ CopyToScreenEdgeTiles:: ; 0ea6 (0:0ea6) ScheduleSouthRowRedraw:: ; 0eb2 (0:0eb2) coord hl, 0, 16 - call CopyToScreenEdgeTiles + call CopyToRedrawRowOrColumnSrcTiles ld a,[wMapViewVRAMPointer] ld l,a ld a,[wMapViewVRAMPointer + 1] @@ -1724,11 +1724,11 @@ ScheduleSouthRowRedraw:: ; 0eb2 (0:0eb2) ld a,h and a,$03 or a,$98 - ld [H_SCREENEDGEREDRAWADDR + 1],a + ld [hRedrawRowOrColumnDest + 1],a ld a,l - ld [H_SCREENEDGEREDRAWADDR],a - ld a,REDRAWROW - ld [H_SCREENEDGEREDRAW],a + ld [hRedrawRowOrColumnDest],a + ld a,REDRAW_ROW + ld [hRedrawRowOrColumnMode],a ret ScheduleEastColumnRedraw:: ; 0ed3 (0:0ed3) @@ -1742,15 +1742,15 @@ ScheduleEastColumnRedraw:: ; 0ed3 (0:0ed3) add a,18 and a,$1f or b - ld [H_SCREENEDGEREDRAWADDR],a + ld [hRedrawRowOrColumnDest],a ld a,[wMapViewVRAMPointer + 1] - ld [H_SCREENEDGEREDRAWADDR + 1],a - ld a,REDRAWCOL - ld [H_SCREENEDGEREDRAW],a + ld [hRedrawRowOrColumnDest + 1],a + ld a,REDRAW_COL + ld [hRedrawRowOrColumnMode],a ret ScheduleColumnRedrawHelper:: ; 0ef2 (0:0ef2) - ld de,wScreenEdgeTiles + ld de,wRedrawRowOrColumnSrcTiles ld c,SCREEN_HEIGHT .loop ld a,[hli] @@ -1773,11 +1773,11 @@ ScheduleWestColumnRedraw:: ; 0f08 (0:0f08) coord hl, 0, 0 call ScheduleColumnRedrawHelper ld a,[wMapViewVRAMPointer] - ld [H_SCREENEDGEREDRAWADDR],a + ld [hRedrawRowOrColumnDest],a ld a,[wMapViewVRAMPointer + 1] - ld [H_SCREENEDGEREDRAWADDR + 1],a - ld a,REDRAWCOL - ld [H_SCREENEDGEREDRAW],a + ld [hRedrawRowOrColumnDest + 1],a + ld a,REDRAW_COL + ld [hRedrawRowOrColumnMode],a ret ; function to write the tiles that make up a tile block to memory diff --git a/home/vblank.asm b/home/vblank.asm index 8ffae9f1..f69d4a86 100644 --- a/home/vblank.asm +++ b/home/vblank.asm @@ -22,7 +22,7 @@ VBlank:: call AutoBgMapTransfer call VBlankCopyBgMap - call RedrawExposedScreenEdge + call RedrawRowOrColumn call VBlankCopy call VBlankCopyDouble call UpdateMovingBgTiles diff --git a/home/vcopy.asm b/home/vcopy.asm index 02caef29..69773cfe 100644 --- a/home/vcopy.asm +++ b/home/vcopy.asm @@ -33,23 +33,26 @@ ClearBgMap:: ; 1cf0 (0:1cf0) jr nz,.loop ret -; When the player takes a step, a row or column of 2x2 tile blocks at the edge -; of the screen toward which they moved is exposed and has to be redrawn. -; This function does the redrawing. -RedrawExposedScreenEdge:: ; 1d01 (0:1d01) - ld a,[H_SCREENEDGEREDRAW] +RedrawRowOrColumn:: ; 1d01 (0:1d01) +; This function redraws a BG row of height 2 or a BG column of width 2. +; One of its main uses is redrawing the row or column that will be exposed upon +; scrolling the BG when the player takes a step. Redrawing only the exposed +; row or column is more efficient than redrawing the entire screen. +; However, this function is also called repeatedly to redraw the whole screen +; when necessary. It is also used in trade animation and elevator code. + ld a,[hRedrawRowOrColumnMode] and a ret z ld b,a xor a - ld [H_SCREENEDGEREDRAW],a + ld [hRedrawRowOrColumnMode],a dec b jr nz,.redrawRow .redrawColumn - ld hl,wScreenEdgeTiles - ld a,[H_SCREENEDGEREDRAWADDR] + ld hl,wRedrawRowOrColumnSrcTiles + ld a,[hRedrawRowOrColumnDest] ld e,a - ld a,[H_SCREENEDGEREDRAWADDR + 1] + ld a,[hRedrawRowOrColumnDest + 1] ld d,a ld c,SCREEN_HEIGHT .loop1 @@ -58,7 +61,7 @@ RedrawExposedScreenEdge:: ; 1d01 (0:1d01) inc de ld a,[hli] ld [de],a - ld a,31 + ld a,BG_MAP_WIDTH - 1 add e ld e,a jr nc,.noCarry @@ -72,23 +75,24 @@ RedrawExposedScreenEdge:: ; 1d01 (0:1d01) dec c jr nz,.loop1 xor a - ld [H_SCREENEDGEREDRAW],a + ld [hRedrawRowOrColumnMode],a ret .redrawRow - ld hl,wScreenEdgeTiles - ld a,[H_SCREENEDGEREDRAWADDR] + ld hl,wRedrawRowOrColumnSrcTiles + ld a,[hRedrawRowOrColumnDest] ld e,a - ld a,[H_SCREENEDGEREDRAWADDR + 1] + ld a,[hRedrawRowOrColumnDest + 1] ld d,a push de - call .drawHalf ; draw upper half + call .DrawHalf ; draw upper half pop de - ld a,32 ; width of VRAM background map + ld a,BG_MAP_WIDTH ; width of VRAM background map add e ld e,a - ; draw lower half -.drawHalf - ld c,10 + ; fall through and draw lower half + +.DrawHalf + ld c,SCREEN_WIDTH / 2 .loop2 ld a,[hli] ld [de],a @@ -113,7 +117,7 @@ RedrawExposedScreenEdge:: ; 1d01 (0:1d01) ; background per V-blank. It cycles through which third it draws. ; This transfer is turned off when walking around the map, but is turned ; on when talking to sprites, battling, using menus, etc. This is because -; the above function, RedrawExposedScreenEdge, is used when walking to +; the above function, RedrawRowOrColumn, is used when walking to ; improve efficiency. AutoBgMapTransfer:: ; 1d57 (0:1d57) ld a,[H_AUTOBGTRANSFERENABLED] @@ -302,12 +306,11 @@ VBlankCopyDouble:: VBlankCopy:: -; Copy [H_VBCOPYSIZE] 2bpp tiles +; Copy [H_VBCOPYSIZE] 2bpp tiles (or 16 * [H_VBCOPYSIZE] tile map entries) ; from H_VBCOPYSRC to H_VBCOPYDEST. -; Source and destination addresses -; are updated, so transfer can -; continue in subsequent calls. +; Source and destination addresses are updated, +; so transfer can continue in subsequent calls. ld a, [H_VBCOPYSIZE] and a |