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150 lines
3.7 KiB
Plaintext
150 lines
3.7 KiB
Plaintext
;license:MIT
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;(c) 2020 by 4am
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;
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!source "src/fx/fx.hgr.precomputed.1bit.a"
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!source "src/fx/fx.dhgr.common.a"
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!macro BUILD_SPARSE_BITMASKS_DHGR .copymasks, .mirror_copymasks {
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; build sparse lookup tables for bitmasks
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ldx #$00
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txa
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- sta .copymasks, x
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sta $C005
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sta .copymasks, x
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sta $C004
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inx
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bne -
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lda #%00000111
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sta .copymasks+$80
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sta .mirror_copymasks+$40
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lda #%00011000
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sta .copymasks+$A0
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sta .mirror_copymasks+$20
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lda #%01100000
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sta .copymasks+$C0
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sta .mirror_copymasks
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sta $C005
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lda #%10000011
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sta .copymasks
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sta .mirror_copymasks+$C0
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lda #%10001100
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sta .copymasks+$20
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sta .mirror_copymasks+$A0
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lda #%10110000
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sta .copymasks+$40
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sta .mirror_copymasks+$80
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lda #%11000000
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sta .copymasks+$60
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sta .mirror_copymasks+$60
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sta $C004
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; X=0
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}
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!macro FX_PRECOMPUTED_1BIT_DHGR .coords {
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+BUILD_SPARSE_BITMASKS_DHGR copymasks, mirror_copymasks
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+BUILD_HGR_LOOKUP_TABLES_X_IS_ALREADY_0 hgrlo, hgr1hi
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+BUILD_HGR_MIRROR_LOOKUP_TABLES hgrlomirror, hgr1himirror
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+BUILD_MIRROR_COLS mirror_cols
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+COPY_SELF_TO_AUXMEM
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ldx #(end-start) ; copy InputLoop code to zero page
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- lda start-1, x
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sta $FF, x
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dex
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bne -
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jmp InputLoop
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start
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!pseudopc 0 {
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Exit1Bit rts
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InputLoop
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ldy #0
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input=*+1
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ldx .coords, y ; first value: HGR row (only 0..95 will be in input array)
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bmi Exit1Bit ; if > 127 then we're done
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+ROW_X_TO_BASE_ADDRESSES
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+ROW_X_TO_MIRROR_ADDRESSES
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inc input
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lda (input), y
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+HIGH_3_LOW_5 input
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sty <y
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clc
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bankloop
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lda copymasks, x
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beq +
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sta <copymask
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; main 1x2 block in top-left quadrant
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src1=*+1
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lda $FDFD, y
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eor (<dest1), y
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copymask=*+1
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and #$FD ; SMC
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eor (<dest1), y
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dest1=*+1
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sta $FDFD, y
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src2=*+1
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lda $FDFD, y
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eor (<dest2), y
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and <copymask
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eor (<dest2), y
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dest2=*+1
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sta $FDFD, y
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; corresponding 1x2 block in bottom-left quadrant (opposite row, original column)
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+COPY_BIT_ZP mirror_src1, mirror_dest1, copymask
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+COPY_BIT_ZP mirror_src2, mirror_dest2, copymask
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+
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lda mirror_copymasks, x
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beq +
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sta <mirror_copymask
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; corresponding 1x2 block in bottom-right quadrant (opposite row, opposite column)
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lda mirror_cols, y
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tay
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mirror_src1=*+1
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lda $FDFD, y
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eor (<mirror_dest1), y
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mirror_copymask=*+1
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and #$FD ; SMC
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eor (<mirror_dest1), y
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mirror_dest1=*+1
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sta $FDFD, y
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mirror_src2=*+1
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lda $FDFD, y
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eor (<mirror_dest2), y
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and <mirror_copymask
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eor (<mirror_dest2), y
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mirror_dest2=*+1
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sta $FDFD, y
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; corresponding 1x2 block in top-right quadrant (same row, opposite column)
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+COPY_BIT_ZP src1, dest1, mirror_copymask
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+COPY_BIT_ZP src2, dest2, mirror_copymask
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+
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bcs +
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sta $C003
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sta $C005
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y=*+1
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ldy #$FD
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sec
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bcs bankloop
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+ sta $C002
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sta $C004
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+INC_INPUT_AND_LOOP InputLoop
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}
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end
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!if * and 1 {
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!byte 0 ;align 2 but avoids the fake allocation bug if it was aligned already
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}
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}
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