mirror of https://github.com/nmlgc/ReC98.git
50 lines
1.0 KiB
NASM
50 lines
1.0 KiB
NASM
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; Blits all tiles in the ring buffer to the playfield in VRAM.
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; void tiles_render_all();
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public tiles_render_all
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tiles_render_all proc near
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push si
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push di
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call egc_start_copy_inlined_noframe
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mov di, ((RES_Y - TILE_H) * ROW_SIZE) + PLAYFIELD_VRAM_X
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mov bx, offset _tile_ring[TILES_MEMORY_X * (TILES_Y - 1) * 2]
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mov ax, GRAM_400
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mov es, ax
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assume es:nothing
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@@start_row:
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mov dl, TILES_X
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@@next_tile_in_row:
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mov si, [bx]
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mov cx, TILE_H
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nop
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@@blit_tile_lines:
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mov ax, es:[si]
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mov es:[di], ax
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add si, ROW_SIZE
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add di, ROW_SIZE
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loop @@blit_tile_lines
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sub di, (TILE_H * ROW_SIZE) - TILE_VRAM_W
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add bx, 2
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dec dl
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jnz short @@next_tile_in_row
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sub bx, (TILES_MEMORY_X + TILES_X) * 2
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sub di, (TILE_H * ROW_SIZE) + (TILE_VRAM_W * TILES_X)
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jge short @@start_row
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call egc_off
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pop di
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pop si
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retn
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tiles_render_all endp
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; void egc_start_copy_inlined_noframe();
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public egc_start_copy_inlined_noframe
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egc_start_copy_inlined_noframe proc near
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EGC_START_COPY_INLINED
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retn
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egc_start_copy_inlined_noframe endp
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nop
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