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https://github.com/deater/dos33fsprogs.git
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second: more messing with draw_boxes
This commit is contained in:
Vince Weaver
parent
3251444dd5
commit
07377a0204
@ -1,29 +1,23 @@
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;
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;
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; optional color, x1,y1 x2,y2
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;
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; HLIN x1,x2 at y1
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; VLIN y1,y2 at X1
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; PLOT x1,y1
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; BOX x1,y1 to x2,y2
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; CLEAR -
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;==========================
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; draw box scene
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;==========================
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; data in INL/INH
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SET_COLOR = $C0
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END = $80
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CLEAR = $81
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BOX = $82
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HLIN = $83
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VLIN = $84
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PLOT = $85
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HLIN_ADD= $86
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HLIN_ADD_LSAME= $87
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HLIN_ADD_RSAME= $88
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BOX_ADD= $89
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BOX_ADD_LSAME= $8A
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BOX_ADD_RSAME= $8B
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VLIN_ADD= $8C
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SET_COLOR = $C0 ; special case, color 0..15 in bottom nybble
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END = $80 ; 0 :
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CLEAR = $81 ; 0 : clear screen to black (0)
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BOX = $82 ; 4 : x1,y1 to x2,y2
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HLIN = $83 ; 3 : x1,x2 at y1
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VLIN = $84 ; 3 : y1,y2 at x1
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PLOT = $85 ; 2 : x1,y1
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HLIN_ADD= $86 ; 2 : x1,x2 at prev_y1+1
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HLIN_ADD_LSAME= $87 ; 1 : prev_x1,x2 at prev_y1+1
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HLIN_ADD_RSAME= $88 ; 1 : x1,prev_x2 at prev_y1+1
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BOX_ADD= $89 ; 3 : x1,prev_y1+1, x2, y2
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BOX_ADD_LSAME= $8A ; 2 : prev_x1,prev_y1+1, x2, y2
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BOX_ADD_RSAME= $8B ; 2 : x1,prev_y1+1, prev_x2, y2
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VLIN_ADD= $8C ; 2 : y1,y2 at prev_x1+1
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BLACK = $00
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RED = $01
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@ -46,12 +40,13 @@ WHITE = $0f
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; top bit set, repeat last command
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; 11xx xxxx
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; ??xx xxxx
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; 00 = co-ord
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; 10 = new command
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; 11 = new-color
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draw_scene:
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lda #0 ; always clear to black
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@ -66,36 +61,63 @@ draw_scene_loop:
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; command
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asl ; clear top bit
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beq done_scene ; if 0, END
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bmi set_color ; if negative, color
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lsr ; shift back down
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sta LAST_TYPE ; store last type
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jsr inc_inl
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jsr inc_inl ; 16 bit increment
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repeat_last:
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lda LAST_TYPE
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; iny ; point to next byte
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beq done_scene ; if 0, END
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; use jump table for rest
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and #$3f
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tax
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dex ; types start at 1
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lda draw_table_h,X
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pha
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sta table_jsr_smc+2
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; pha
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lda draw_table_l,X
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pha
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rts ; jump to it
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; pha
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sta table_jsr_smc+1
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table_jsr_smc:
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jsr $FFFF
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;========================================
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; adds A to input pointer and continues
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update_pointer:
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ldx LAST_TYPE
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lda bytes_used,X
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update_pointer_already_in_a:
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clc
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adc INL
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sta INL
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lda #0
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adc INH
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sta INH
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bcc draw_scene_loop ; bra (would only be set if wrap $FFFF)
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;============================
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; done scene
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;============================
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; increment pointer and return
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done_scene:
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inc INL
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bne really_done_scene
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inc INH
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really_done_scene:
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rts
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;============================
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; set color
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;============================
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; color is A*2h
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set_color:
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; make top and bottom byte the same
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@ -109,34 +131,32 @@ set_color:
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adc COLOR
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sta COLOR
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lda #1 ; we were one byte long
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; bne update_pointer
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; special case as we are encoded differently from
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; the actions
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lda #1 ; we were one byte long
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bne update_pointer_already_in_a ; bra
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; adds A to input pointer and continues
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update_pointer:
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clc
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adc INL
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sta INL
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lda #0
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adc INH
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sta INH
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jmp draw_scene_loop
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bytes_used:
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.byte 0,0,4,3 ; END, CLEAR, BOX, HLIN
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.byte 3,2,2,1 ; VLIN, PLOT, HLIN_ADD, HLIN_ADD_LSAME
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.byte 1,3,2,2 ; HLIN_ADD_RSAME, BOX_ADD, BOX_ADD_LSAME
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.byte 2,2 ; BOX_ADD_RSAME, VLIN_ADD
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draw_table_l:
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.byte <(clear_screen-1),<(draw_box-1),<(draw_hlin-1),<(draw_vlin-1)
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.byte <(draw_plot-1)
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.byte <(draw_hlin_add-1),<(draw_hlin_add_lsame-1),<(draw_hlin_add_rsame-1)
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.byte <(draw_box_add-1),<(draw_box_add_lsame-1),<(draw_box_add_rsame-1)
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.byte <(draw_vlin_add-1)
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.byte <(clear_screen),<(draw_box),<(draw_hlin),<(draw_vlin)
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.byte <(draw_plot)
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.byte <(draw_hlin_add),<(draw_hlin_add_lsame),<(draw_hlin_add_rsame)
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.byte <(draw_box_add),<(draw_box_add_lsame),<(draw_box_add_rsame)
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.byte <(draw_vlin_add)
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draw_table_h:
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.byte >(clear_screen-1),>(draw_box-1),>(draw_hlin-1),>(draw_vlin-1)
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.byte >(draw_plot-1)
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.byte >(draw_hlin_add-1),>(draw_hlin_add_lsame-1),>(draw_hlin_add_rsame-1)
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.byte >(draw_box_add-1),>(draw_box_add_lsame-1),>(draw_box_add_rsame-1)
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.byte >(draw_vlin_add-1)
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.byte >(clear_screen),>(draw_box),>(draw_hlin),>(draw_vlin)
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.byte >(draw_plot)
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.byte >(draw_hlin_add),>(draw_hlin_add_lsame),>(draw_hlin_add_rsame)
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.byte >(draw_box_add),>(draw_box_add_lsame),>(draw_box_add_rsame)
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.byte >(draw_vlin_add)
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;=================================
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;=================================
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@ -144,9 +164,8 @@ draw_table_h:
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;=================================
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;=================================
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clear_screen:
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jsr clear_fullgr
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lda #0
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jmp update_pointer
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jmp clear_fullgr ; tail call
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; jmp draw_scene_loop ; skip inc pointer
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;=================================
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;=================================
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@ -165,7 +184,6 @@ clear_screen:
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; 3/4 case, 2 to 1 (!)
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; 3/6 case, 2 to 2
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draw_box:
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; iny
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lda (INL),Y
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sta X1
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iny
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@ -176,13 +194,10 @@ draw_box:
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sta X2
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iny
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lda (INL),Y
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sta Y2
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sta Y2 ; keep even though not necessary
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jsr draw_box_common
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done_draw_box:
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lda #4
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jmp update_pointer
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; fall through
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;==================================
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@ -211,7 +226,7 @@ odd_bottom_draw_box:
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; we're odd, need to call HLIN
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jsr hlin_mask_odd
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jsr hlin_common
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iny
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@ -265,8 +280,9 @@ done_draw_box_yloop:
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definitely_odd_bottom:
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; done
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rts
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; jmp update_pointer
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rts
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;=================================
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@ -293,12 +309,12 @@ draw_hlin:
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jsr hlin_mask_even
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jmp hlin_done
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do_hlin_mask_odd:
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jsr hlin_mask_odd
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jsr hlin_common
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; done
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hlin_done:
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lda #3
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jmp update_pointer
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rts
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; jmp update_pointer
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@ -328,13 +344,12 @@ draw_hlin_add:
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jsr hlin_mask_even
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jmp hlin_add_done
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do_hlin_add_mask_odd:
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jsr hlin_mask_odd
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jsr hlin_common
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; done
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hlin_add_done:
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lda #2
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jmp update_pointer
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; jmp update_pointer
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rts
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;=================================
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;=================================
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@ -360,13 +375,13 @@ draw_hlin_add_lsame:
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jsr hlin_mask_even
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jmp hlin_add_lsame_done
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do_hlin_add_lsame_mask_odd:
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jsr hlin_mask_odd
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jsr hlin_common
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; done
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hlin_add_lsame_done:
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lda #1
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jmp update_pointer
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; jmp update_pointer
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rts
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;=================================
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;=================================
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@ -392,13 +407,12 @@ draw_hlin_add_rsame:
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jsr hlin_mask_even
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jmp hlin_add_rsame_done
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do_hlin_add_rsame_mask_odd:
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jsr hlin_mask_odd
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jsr hlin_common
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; done
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hlin_add_rsame_done:
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lda #1
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jmp update_pointer
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; jmp update_pointer
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rts
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;=================================
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;=================================
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@ -418,12 +432,9 @@ draw_box_add:
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sta X2
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iny
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lda (INL),Y
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sta Y2
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sta Y2 ; needed?
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jsr draw_box_common
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lda #3
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jmp update_pointer
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jmp draw_box_common
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;=================================
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@ -443,12 +454,9 @@ draw_box_add_lsame:
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sta X2
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iny
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lda (INL),Y
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sta Y2
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sta Y2 ; needed?
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jsr draw_box_common
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lda #2
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jmp update_pointer
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jmp draw_box_common
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;=================================
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@ -468,12 +476,9 @@ draw_box_add_rsame:
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sta X1
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iny
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lda (INL),Y
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sta Y2
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sta Y2 ; needed?
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jsr draw_box_common
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lda #2
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jmp update_pointer
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jmp draw_box_common
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;=================================
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@ -492,8 +497,8 @@ draw_vlin_add:
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jsr draw_vlin_common
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lda #2
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jmp update_pointer
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; jmp update_pointer
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rts
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;=================================
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;=================================
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@ -512,9 +517,8 @@ draw_vlin:
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sta X1
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jsr draw_vlin_common
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lda #3
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jmp update_pointer
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; jmp update_pointer
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rts
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;================================
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draw_vlin_common:
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@ -625,9 +629,8 @@ plot_done:
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; done
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lda #2
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jmp update_pointer
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; jmp update_pointer
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rts
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;===================================
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;===================================
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@ -639,6 +642,8 @@ plot_done:
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; call the proper entry point
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; Y untouched
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hlin_common:
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hlin_mask_odd:
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lda #$0F
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.byte $2C ; bit trick
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@ -713,7 +718,8 @@ plot_s_smc:
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rts
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;===========================
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; 16-bit increment of INL
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; inline this?
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inc_inl:
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inc INL
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