403 lines
10 KiB
Common Lisp
403 lines
10 KiB
Common Lisp
((code
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(label main
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; Open screen
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; use load immediate because it is a pointer to a string, not a value
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(load-immediate $0 &screen-namespace)
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(load-immediate $11 0)
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(syscall OPEN $18 $0 $11) ; open(out Plex screen, in namespace, in flags)
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(load-offset-32 $0 $18 4) ; load handle
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(load-offset-32 $20 $18 8) ; load width
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(load-offset-32 $22 $18 12) ; load size
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(load-immediate $1 16) ; offset for screen buffer
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(add-nat $21 $18 $1)
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; open mouse
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(load-immediate $16 &mouse-namespace)
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(syscall OPEN $15 $16 $11) ; open(out Plex mouse, in namespace, in flags)
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(load-offset-32 $16 $15 4) ; load handle
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; outline_swatch(screen, BLACK, 1, 1);
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(push $21)
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(push $20)
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(load-absolute-32 $1 &BLACK)
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(push $1)
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(load-immediate $12 1)
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(push $12)
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(load-immediate $13 1)
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(push $13)
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(call &draw-outlined-swatch)
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; outline_swatch(screen, WHITE, 1, 1);
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(push $21)
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(push $20)
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(load-absolute-32 $1 &WHITE)
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(push $1)
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(load-immediate $12 21)
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(push $12)
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(load-immediate $13 1)
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(push $13)
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(call &draw-outlined-swatch)
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; screen.draw();
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(syscall WRITE $0 $21 $22)
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(load-immediate $3 16)
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(label draw-loop
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; load mouse click data
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(syscall READ $16 $2 $3 $15)
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(load-offset-8 $9 $15 16) ; load btn1 pressed
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(jump-eq-nat &draw-loop $9 $11)
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(load-offset-32 $7 $2 8) ; load x
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(load-offset-32 $8 $2 12) ; load y
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(load-immediate $14 20) ; box size
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; first row
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(push $21)
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(push $20)
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(load-absolute-32 $1 &BLACK)
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(push $1)
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(load-immediate $12 1)
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(push $12)
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(load-immediate $13 1)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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(push $21)
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(push $20)
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(load-absolute-32 $1 &WHITE)
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(push $1)
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(load-immediate $12 21)
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(push $12)
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(load-immediate $13 1)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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; row 2
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(push $21)
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(push $20)
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(load-absolute-32 $1 &CHARCOAL)
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(push $1)
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(load-immediate $12 1)
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(push $12)
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(load-immediate $13 21)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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(push $21)
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(push $20)
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(load-absolute-32 $1 &DARK-GRAY)
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(push $1)
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(load-immediate $12 21)
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(push $12)
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(load-immediate $13 21)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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; row 3
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(push $21)
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(push $20)
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(load-absolute-32 $1 &RED)
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(push $1)
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(load-immediate $12 1)
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(push $12)
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(load-immediate $13 41)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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(push $21)
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(push $20)
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(load-absolute-32 $1 &ORANGE)
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(push $1)
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(load-immediate $12 21)
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(push $12)
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(load-immediate $13 41)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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; row 3
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(push $21)
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(push $20)
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(load-absolute-32 $1 &YELLOW)
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(push $1)
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(load-immediate $12 1)
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(push $12)
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(load-immediate $13 61)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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(push $21)
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(push $20)
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(load-absolute-32 $1 &GREEN)
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(push $1)
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(load-immediate $12 21)
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(push $12)
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(load-immediate $13 61)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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; row 4
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(push $21)
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(push $20)
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(load-absolute-32 $1 &BLUE)
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(push $1)
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(load-immediate $12 1)
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(push $12)
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(load-immediate $13 81)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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(push $21)
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(push $20)
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(load-absolute-32 $1 &PURPLE)
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(push $1)
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(load-immediate $12 21)
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(push $12)
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(load-immediate $13 81)
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(push $13)
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(call &draw-outlined-swatch)
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(push $14) ; box_size (20)
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(push $13) ; box_y
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(push $12) ; box_x
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(push $8) ; click_y
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(push $7) ; click_x
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(push $1) ; color
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(call &set-color-if-clicked)
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(syscall WRITE $0 $21 $22)
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(load-absolute-32 $22 &SELECTED-COLOR) ; color
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(load-immediate $1 5) ; size of brush
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(push $21) ;base
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(push $20) ;width
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(push $22) ; color
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(push $7) ;x
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(push $8) ;y
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(push $1)
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(push $1)
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(call &draw-box)
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(jump &draw-loop))
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; Flush and halt
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(halt))
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(label set-color-if-clicked
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; Pop inputs from stack (in reverse order of pushing)
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(pop $11) ; $11 = color
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(pop $0) ; $0 = click_x
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(pop $1) ; $1 = click_y
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(pop $2) ; $2 = box_x
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(pop $3) ; $3 = box_y
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(pop $5) ; $5 = box_size
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; Compute right = box_x + box_size
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(add-int $6 $2 $5) ; $6 = right edge
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; Compute bottom = box_y + box_size
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(add-int $7 $3 $5) ; $7 = bottom edge
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; Bounds check: x in [box_x, right] and y in [box_y, bottom]
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(jump-lt-int &fail $0 $2)
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(jump-gt-int &fail $0 $6)
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(jump-lt-int &fail $1 $3)
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(jump-gt-int &fail $1 $7)
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(load-immediate $10 &SELECTED-COLOR)
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(store-absolute-8 $10 $11)
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(label fail)
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(return))
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(label draw-outlined-swatch
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(pop $3) ; y
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(pop $2) ; x
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(pop $1) ; color
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(pop $20)
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(pop $21)
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; Constants
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(load-absolute-32 $4 &GRAY)
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(load-absolute-32 $10 &SELECTED-COLOR)
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(jump-eq-int &set-selected $10 $1)
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(jump-eq-int &end-set-selected $4 $4)
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(label set-selected)
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(load-absolute-32 $4 &DARK-GRAY)
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(label end-set-selected)
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(load-immediate $5 20) ; outline size
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(load-immediate $6 17) ; fill size
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(load-immediate $7 2) ; offset
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(push $21) ; base
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(push $20) ; width
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(push $4) ; color (gray)
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(push $2) ; x
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(push $3) ; y
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(push $5) ; width (20)
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(push $5) ; height (20)
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(call &draw-box)
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(add-int $8 $2 $7) ; x + 2
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(add-int $9 $3 $7) ; y + 2
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(push $21) ; base
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(push $20) ; width
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(push $1) ; color (original)
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(push $8) ; x + 2
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(push $9) ; y + 2
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(push $6) ; width (17)
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(push $6) ; height (17)
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(call &draw-box)
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(return))
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; draw-box(color, x, y)
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; Pops: y, x, color
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(label draw-box
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; Pop arguments (reverse order)
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(pop $14) ; height
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(pop $12) ; width
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(pop $13) ; y_start
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(pop $11) ; x_start
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(pop $3) ; color
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(pop $2) ; width
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(pop $21) ; base
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; Constants
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(load-immediate $1 1) ; increment
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; Compute start address: base + y*640 + x
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(mul-int $15 $13 $2) ; $15 = y * 640
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(add-int $15 $15 $11) ; $15 += x
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(add-nat $15 $21 $15) ; $15 = base + pixel_offset
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(load-immediate $25 4)
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(add-nat $15 $15 $25) ; need to add offset for fat pointer size
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(register-move $4 $15)
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; Outer loop: height times
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(register-move $5 $14) ; $5 = row counter
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(label draw-box-outer
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(add-int $6 $4 $12) ; $6 = row end = current + width
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(register-move $7 $4) ; $7 = pixel pointer
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(memset-8 $7 $3 $12) ; draw row
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(add-int $4 $4 $2) ; next row (+= 640)
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(sub-int $5 $5 $1) ; decrement row count
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(jump-gt-int &draw-box-outer $5 0))
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(return)))
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(data
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(label screen-namespace "/dev/screen/0")
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(label mouse-namespace "/dev/mouse/0")
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(label SELECTED-COLOR 255)
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(label BLACK 0)
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(label WHITE 255)
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(label CHARCOAL 36)
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(label DARK-GRAY 73)
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(label GRAY 146)
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(label LIGHT-GRAY 182)
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(label DARK-RED 128)
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(label RED 224)
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(label DARK-YELLOW 144)
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(label YELLOW 252)
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(label DARK-TEAL 9)
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(label TEAL 18)
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(label DARK-GREEN 12)
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(label GREEN 16)
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(label LIME 28)
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(label LIGHT-CYAN 159)
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(label NAVY 2)
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(label BLUE 3)
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(label DEEP-SKY-BLUE 10)
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(label LIGHT-BLUE 19)
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(label PURPLE 131)
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(label LIGHT-PURPLE 147)
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(label DARK-MAGENTA 130)
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(label MAGENTA 227)
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(label PLUM 129)
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(label PINK 226)
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(label SADDLE-BROWN 72)
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(label PERU 141)
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(label SIENNA 136)
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(label ORANGE 241)
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(label DARK-ORANGE 208)
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(label GOLD 244)))
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