1669 lines
60 KiB
Plaintext
1669 lines
60 KiB
Plaintext
''***************************************
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''* Graphics Driver v1.0 *
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''* Author: Chip Gracey *
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''* Copyright (c) 2005 Parallax, Inc. *
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''* See end of file for terms of use. *
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''***************************************
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''
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'' Theory of Operation:
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''
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'' A cog is launched which processes commands via the PUB routines.
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''
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'' Points, lines, arcs, sprites, text, and polygons are rasterized into
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'' a specified stretch of memory which serves as a generic bitmap buffer.
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''
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'' The bitmap can be displayed by the TV.SRC or VGA.SRC driver.
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''
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'' See GRAPHICS_DEMO.SRC for usage example.
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''
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CON
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#1, _setup, _color, _width, _plot, _line, _arc, _vec, _vecarc, _pix, _pixarc, _text, _textarc, _textmode, _fill, _loop
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VAR
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long cog
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long command
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long bitmap_base 'bitmap data
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long bitmap_longs
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word bases[32]
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long pixel_width 'pixel data
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long slices[8]
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long text_xs, text_ys, text_sp, text_just 'text data (these 4 must be contiguous)
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PUB start : okay
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'' Start graphics driver - starts a cog
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'' returns false if no cog available
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fontptr := @font 'set font pointer (same for all instances)
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stop
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okay := cog := cognew(@loop, @command) + 1
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PUB stop
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'' Stop graphics driver - frees a cog
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if cog
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cogstop(cog~ - 1)
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command~
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PUB setup(x_tiles, y_tiles, x_origin, y_origin, base_ptr) | bases_ptr, slices_ptr
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'' Set bitmap parameters
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''
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'' x_tiles - number of x tiles (tiles are 16x16 pixels each)
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'' y_tiles - number of y tiles
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'' x_origin - relative-x center pixel
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'' y_origin - relative-y center pixel
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'' base_ptr - base address of bitmap
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setcommand(_loop, 0) 'make sure last command finished
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repeat bases_ptr from 0 to x_tiles - 1 <# 31 'write bases
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bases[bases_ptr] := base_ptr + bases_ptr * y_tiles << 6
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y_tiles <<= 4 'adjust arguments and do setup command
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y_origin := y_tiles - y_origin - 1
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bases_ptr := @bases
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slices_ptr := @slices
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setcommand(_setup, @x_tiles)
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bitmap_base := base_ptr 'retain high-level bitmap data
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bitmap_longs := x_tiles * y_tiles
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PUB clear
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'' Clear bitmap
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setcommand(_loop, 0) 'make sure last command finished
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longfill(bitmap_base, 0, bitmap_longs) 'clear bitmap
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PUB copy(dest_ptr)
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'' Copy bitmap
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'' use for double-buffered display (flicker-free)
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''
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'' dest_ptr - base address of destination bitmap
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setcommand(_loop, 0) 'make sure last command finished
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longmove(dest_ptr, bitmap_base, bitmap_longs) 'copy bitmap
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PUB color(c)
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'' Set pixel color to two-bit pattern
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''
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'' c - color code in bits[1..0]
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setcommand(_color, @colors[c & 3]) 'set color
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PUB width(w) | pixel_passes, r, i, p
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'' Set pixel width
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'' actual width is w[3..0] + 1
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''
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'' w - 0..15 for round pixels, 16..31 for square pixels
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r := not w & $10 'determine pixel shape/width
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w &= $F
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pixel_width := w
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pixel_passes := w >> 1 + 1
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setcommand(_width, @w) 'do width command now to avoid updating slices when busy
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p := w ^ $F 'update slices to new shape/width
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repeat i from 0 to w >> 1
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slices[i] := true >> (p << 1) << (p & $E)
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if r and pixels[w] & |< i
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p += 2
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if r and i == pixel_passes - 2
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p += 2
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PUB colorwidth(c, w)
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'' Set pixel color and width
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color(c)
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width(w)
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PUB plot(x, y)
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'' Plot point
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''
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'' x,y - point
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setcommand(_plot, @x)
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PUB line(x, y)
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'' Draw a line to point
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''
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'' x,y - endpoint
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setcommand(_line, @x)
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PUB arc(x, y, xr, yr, angle, anglestep, steps, arcmode)
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'' Draw an arc
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''
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'' x,y - center of arc
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'' xr,yr - radii of arc
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'' angle - initial angle in bits[12..0] (0..$1FFF = 0°..359.956°)
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'' anglestep - angle step in bits[12..0]
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'' steps - number of steps (0 just leaves (x,y) at initial arc position)
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'' arcmode - 0: plot point(s)
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'' 1: line to point(s)
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'' 2: line between points
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'' 3: line from point(s) to center
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setcommand(_arc, @x)
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PUB vec(x, y, vecscale, vecangle, vecdef_ptr)
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'' Draw a vector sprite
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''
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'' x,y - center of vector sprite
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'' vecscale - scale of vector sprite ($100 = 1x)
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'' vecangle - rotation angle of vector sprite in bits[12..0]
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'' vecdef_ptr - address of vector sprite definition
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''
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''
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'' Vector sprite definition:
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''
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'' word $8000|$4000+angle 'vector mode + 13-bit angle (mode: $4000=plot, $8000=line)
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'' word length 'vector length
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'' ... 'more vectors
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'' ...
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'' word 0 'end of definition
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setcommand(_vec, @x)
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PUB vecarc(x, y, xr, yr, angle, vecscale, vecangle, vecdef_ptr)
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'' Draw a vector sprite at an arc position
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''
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'' x,y - center of arc
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'' xr,yr - radii of arc
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'' angle - angle in bits[12..0] (0..$1FFF = 0°..359.956°)
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'' vecscale - scale of vector sprite ($100 = 1x)
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'' vecangle - rotation angle of vector sprite in bits[12..0]
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'' vecdef_ptr - address of vector sprite definition
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setcommand(_vecarc, @x)
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PUB pix(x, y, pixrot, pixdef_ptr)
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'' Draw a pixel sprite
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''
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'' x,y - center of vector sprite
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'' pixrot - 0: 0°, 1: 90°, 2: 180°, 3: 270°, +4: mirror
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'' pixdef_ptr - address of pixel sprite definition
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''
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''
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'' Pixel sprite definition:
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''
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'' word 'word align, express dimensions and center, define pixels
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'' byte xwords, ywords, xorigin, yorigin
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'' word %%xxxxxxxx,%%xxxxxxxx
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'' word %%xxxxxxxx,%%xxxxxxxx
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'' word %%xxxxxxxx,%%xxxxxxxx
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'' ...
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setcommand(_pix, @x)
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PUB pixarc(x, y, xr, yr, angle, pixrot, pixdef_ptr)
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'' Draw a pixel sprite at an arc position
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''
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'' x,y - center of arc
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'' xr,yr - radii of arc
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'' angle - angle in bits[12..0] (0..$1FFF = 0°..359.956°)
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'' pixrot - 0: 0°, 1: 90°, 2: 180°, 3: 270°, +4: mirror
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'' pixdef_ptr - address of pixel sprite definition
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setcommand(_pixarc, @x)
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PUB text(x, y, string_ptr) | justx, justy
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'' Draw text
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''
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'' x,y - text position (see textmode for sizing and justification)
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'' string_ptr - address of zero-terminated string (it may be necessary to call .finish
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'' immediately afterwards to prevent subsequent code from clobbering the
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'' string as it is being drawn
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justify(string_ptr, @justx) 'justify string and draw text
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setcommand(_text, @x)
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PUB textarc(x, y, xr, yr, angle, string_ptr) | justx, justy
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'' Draw text at an arc position
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''
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'' x,y - center of arc
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'' xr,yr - radii of arc
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'' angle - angle in bits[12..0] (0..$1FFF = 0°..359.956°)
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'' string_ptr - address of zero-terminated string (it may be necessary to call .finish
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'' immediately afterwards to prevent subsequent code from clobbering the
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'' string as it is being drawn
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justify(string_ptr, @justx) 'justify string and draw text
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setcommand(_textarc, @x)
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PUB textmode(x_scale, y_scale, spacing, justification)
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'' Set text size and justification
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''
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'' x_scale - x character scale, should be 1+
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'' y_scale - y character scale, should be 1+
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'' spacing - character spacing, 6 is normal
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'' justification - bits[1..0]: 0..3 = left, center, right, left
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'' bits[3..2]: 0..3 = bottom, center, top, bottom
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longmove(@text_xs, @x_scale, 4) 'retain high-level text data
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setcommand(_textmode, @x_scale) 'set text mode
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PUB box(x, y, box_width, box_height) | x2, y2, pmin, pmax
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'' Draw a box with round/square corners, according to pixel width
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''
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'' x,y - box left, box bottom
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if box_width > pixel_width and box_height > pixel_width
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pmax := pixel_width - (pmin := pixel_width >> 1) 'get pixel-half-min and pixel-half-max
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x += pmin 'adjust coordinates to accomodate width
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y += pmin
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x2 := x + box_width - 1 - pixel_width
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y2 := y + box_height - 1 - pixel_width
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plot(x, y) 'plot round/square corners
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plot(x, y2)
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plot(x2, y)
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plot(x2, y2)
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fill(x, y2 + pmax, 0, (x2 - x) << 16, 0, 0, pmax) 'fill gaps
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fill(x, y, 0, (x2 - x) << 16, 0, 0, pmin)
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fill(x - pmin, y2, 0, (x2 - x + pixel_width) << 16, 0, 0, y2 - y)
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PUB quad(x1, y1, x2, y2, x3, y3, x4, y4)
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'' Draw a solid quadrilateral
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'' vertices must be ordered clockwise or counter-clockwise
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tri(x1, y1, x2, y2, x3, y3) 'draw two triangle to make 4-sides polygon
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tri(x3, y3, x4, y4, x1, y1)
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PUB tri(x1, y1, x2, y2, x3, y3) | xy[2]
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'' Draw a solid triangle
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' reorder vertices by descending y
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case (y1 => y2) & %100 | (y2 => y3) & %010 | (y1 => y3) & %001
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%000:
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longmove(@xy, @x1, 2)
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longmove(@x1, @x3, 2)
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longmove(@x3, @xy, 2)
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%010:
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longmove(@xy, @x1, 2)
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longmove(@x1, @x2, 4)
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longmove(@x3, @xy, 2)
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%011:
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longmove(@xy, @x1, 2)
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longmove(@x1, @x2, 2)
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longmove(@x2, @xy, 2)
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%100:
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longmove(@xy, @x3, 2)
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longmove(@x2, @x1, 4)
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longmove(@x1, @xy, 2)
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%101:
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longmove(@xy, @x2, 2)
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longmove(@x2, @x3, 2)
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longmove(@x3, @xy, 2)
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' draw triangle
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fill(x1, y1, (x3 - x1) << 16 / (y1 - y3 + 1), (x2 - x1) << 16 / (y1 - y2 + 1), (x3 - x2) << 16 / (y2 - y3 + 1), y1 - y2, y1 - y3)
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PUB finish
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'' Wait for any current graphics command to finish
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'' use this to insure that it is safe to manually manipulate the bitmap
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setcommand(_loop, 0) 'make sure last command finished
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PRI fill(x, y, da, db, db2, linechange, lines_minus_1)
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setcommand(_fill, @x)
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PRI justify(string_ptr, justptr) | x
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x := (strsize(string_ptr) - 1) * text_xs * text_sp + text_xs * 5 - 1
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long[justptr] := -lookupz(text_just >> 2 & 3: 0, x >> 1, x, 0)
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long[justptr][1] := -lookupz(text_just & 3: 0, text_ys << 3, text_ys << 4, 0)
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PRI setcommand(cmd, argptr)
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command := cmd << 16 + argptr 'write command and pointer
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repeat while command 'wait for command to be cleared, signifying receipt
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CON
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' Vector font primitives
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xa0 = %000 << 0 'x line start / arc center
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xa1 = %001 << 0
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xa2 = %010 << 0
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xa3 = %011 << 0
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xa4 = %100 << 0
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xa5 = %101 << 0
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xa6 = %110 << 0
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xa7 = %111 << 0
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ya0 = %0000 << 3 'y line start / arc center
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ya1 = %0001 << 3
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ya2 = %0010 << 3
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ya3 = %0011 << 3
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ya4 = %0100 << 3
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ya5 = %0101 << 3
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ya6 = %0110 << 3
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ya7 = %0111 << 3
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ya8 = %1000 << 3
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ya9 = %1001 << 3
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yaA = %1010 << 3
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yaB = %1011 << 3
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yaC = %1100 << 3
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yaD = %1101 << 3
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yaE = %1110 << 3
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yaF = %1111 << 3
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xb0 = %000 << 7 'x line end
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xb1 = %001 << 7
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xb2 = %010 << 7
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xb3 = %011 << 7
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xb4 = %100 << 7
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xb5 = %101 << 7
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xb6 = %110 << 7
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xb7 = %111 << 7
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yb0 = %0000 << 10 'y line end
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yb1 = %0001 << 10
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yb2 = %0010 << 10
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yb3 = %0011 << 10
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yb4 = %0100 << 10
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yb5 = %0101 << 10
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yb6 = %0110 << 10
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yb7 = %0111 << 10
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yb8 = %1000 << 10
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yb9 = %1001 << 10
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ybA = %1010 << 10
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ybB = %1011 << 10
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ybC = %1100 << 10
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ybD = %1101 << 10
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ybE = %1110 << 10
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ybF = %1111 << 10
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ax1 = %0 << 7 'x arc radius
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ax2 = %1 << 7
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ay1 = %00 << 8 'y arc radius
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ay2 = %01 << 8
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ay3 = %10 << 8
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ay4 = %11 << 8
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a0 = %0000 << 10 'arc start/length
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a1 = %0001 << 10 'bits[1..0] = start (0..3 = 0°, 90°, 180°, 270°)
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a2 = %0010 << 10 'bits[3..2] = length (0..3 = 360°, 270°, 180°, 90°)
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a3 = %0011 << 10
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a4 = %0100 << 10
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a5 = %0101 << 10
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a6 = %0110 << 10
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a7 = %0111 << 10
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a8 = %1000 << 10
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a9 = %1001 << 10
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aA = %1010 << 10
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aB = %1011 << 10
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aC = %1100 << 10
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aD = %1101 << 10
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aE = %1110 << 10
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aF = %1111 << 10
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fline = %0 << 14 'line command
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farc = %1 << 14 'arc command
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more = %1 << 15 'another arc/line
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DAT
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' Color codes
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colors long %%0000000000000000
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long %%1111111111111111
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long %%2222222222222222
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long %%3333333333333333
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' Round pixel recipes
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pixels byte %00000000,%00000000,%00000000,%00000000 '0,1,2,3
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byte %00000000,%00000000,%00000010,%00000101 '4,5,6,7
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byte %00001010,%00001010,%00011010,%00011010 '8,9,A,B
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byte %00110100,%00111010,%01110100,%01110100 'C,D,E,F
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' Vector font - standard ascii characters ($21-$7E)
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font word fline + xa2 + yaC + xb2 + yb7 + more '!
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word fline + xa2 + ya5 + xb2 + yb4
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word fline + xa1 + yaD + xb1 + ybC + more '"
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word fline + xa3 + yaD + xb3 + ybC
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word fline + xa1 + yaA + xb1 + yb6 + more '#
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word fline + xa3 + yaA + xb3 + yb6 + more
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word fline + xa0 + ya9 + xb4 + yb9 + more
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word fline + xa0 + ya7 + xb4 + yb7
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word farc + xa2 + ya9 + a9 + ax2 + ay1 + more '$
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word farc + xa2 + ya7 + aB + ax2 + ay1 + more
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word fline + xa0 + ya6 + xb2 + yb6 + more
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word fline + xa2 + yaA + xb4 + ybA + more
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word fline + xa2 + yaA + xb2 + ybB + more
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word fline + xa2 + ya6 + xb2 + yb5
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word farc + xa1 + yaA + a0 + ax1 + ay1 + more '%
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word farc + xa3 + ya6 + a0 + ax1 + ay1 + more
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word fline + xa0 + ya6 + xb4 + ybA
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word farc + xa2 + yaA + a7 + ax1 + ay1 + more '&
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word farc + xa2 + ya7 + a5 + ax2 + ay2 + more
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word fline + xa1 + yaA + xb4 + yb5
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word fline + xa2 + yaD + xb2 + ybC ' '
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word farc + xa3 + ya9 + aD + ax1 + ay4 + more '(
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word farc + xa3 + ya7 + aE + ax1 + ay4 + more
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word fline + xa2 + ya7 + xb2 + yb9
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word farc + xa1 + ya9 + aC + ax1 + ay4 + more ')
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word farc + xa1 + ya7 + aF + ax1 + ay4 + more
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word fline + xa2 + ya7 + xb2 + yb9
|
|
|
|
word fline + xa4 + ya6 + xb0 + ybA + more '*
|
|
word fline + xa0 + ya6 + xb4 + ybA + more
|
|
word fline + xa2 + yaB + xb2 + yb5
|
|
|
|
word fline + xa0 + ya8 + xb4 + yb8 + more '+
|
|
word fline + xa2 + yaA + xb2 + yb6
|
|
|
|
word fline + xa2 + ya4 + xb1 + yb3 ',
|
|
|
|
word fline + xa0 + ya8 + xb4 + yb8 '-
|
|
|
|
word fline + xa2 + ya5 + xb2 + yb4 '.
|
|
|
|
word fline + xa0 + ya4 + xb4 + ybC '/
|
|
|
|
word farc + xa2 + ya8 + a0 + ax2 + ay4 '0
|
|
|
|
word fline + xa0 + ya4 + xb4 + yb4 + more '1
|
|
word fline + xa2 + ya4 + xb2 + ybC + more
|
|
word fline + xa0 + yaA + xb2 + ybC
|
|
|
|
word farc + xa2 + yaA + a8 + ax2 + ay2 + more '2
|
|
word farc + xa2 + yaA + aF + ax2 + ay3 + more
|
|
word farc + xa2 + ya4 + aD + ax2 + ay3 + more
|
|
word fline + xa0 + ya4 + xb4 + yb4
|
|
|
|
word farc + xa2 + yaA + a7 + ax2 + ay2 + more '3
|
|
word farc + xa2 + ya6 + a6 + ax2 + ay2
|
|
|
|
word fline + xa2 + yaC + xb0 + yb7 + more '4
|
|
word fline + xa0 + ya7 + xb4 + yb7 + more
|
|
word fline + xa3 + ya4 + xb3 + yb8
|
|
|
|
word farc + xa2 + ya6 + aB + ax2 + ay2 + more '5
|
|
word fline + xa4 + yaC + xb0 + ybC + more
|
|
word fline + xa0 + yaC + xb0 + yb8 + more
|
|
word fline + xa0 + ya8 + xb2 + yb8 + more
|
|
word fline + xa0 + ya4 + xb2 + yb4
|
|
|
|
word farc + xa2 + ya6 + a0 + ax2 + ay2 + more '6
|
|
word farc + xa2 + ya8 + aD + ax2 + ay4 + more
|
|
word fline + xa0 + ya6 + xb0 + yb8 + more
|
|
word fline + xa2 + yaC + xb3 + ybC
|
|
|
|
word fline + xa0 + yaC + xb4 + ybC + more '7
|
|
word fline + xa1 + ya4 + xb4 + ybC
|
|
|
|
word farc + xa2 + ya6 + a0 + ax2 + ay2 + more '8
|
|
word farc + xa2 + yaA + a0 + ax2 + ay2
|
|
|
|
word farc + xa2 + yaA + a0 + ax2 + ay2 + more '9
|
|
word farc + xa2 + ya8 + aF + ax2 + ay4 + more
|
|
word fline + xa4 + ya8 + xb4 + ybA + more
|
|
word fline + xa1 + ya4 + xb2 + yb4
|
|
|
|
word fline + xa2 + ya6 + xb2 + yb7 + more ':
|
|
word fline + xa2 + yaA + xb2 + yb9
|
|
|
|
word fline + xa2 + ya4 + xb1 + yb3 + more ';
|
|
word fline + xa2 + ya8 + xb2 + yb7
|
|
|
|
word fline + xa0 + ya8 + xb4 + ybA + more '<
|
|
word fline + xa0 + ya8 + xb4 + yb6
|
|
|
|
word fline + xa0 + yaA + xb4 + ybA + more '=
|
|
word fline + xa0 + ya6 + xb4 + yb6
|
|
|
|
word fline + xa4 + ya8 + xb0 + ybA + more '>
|
|
word fline + xa4 + ya8 + xb0 + yb6
|
|
|
|
word farc + xa2 + yaB + a8 + ax2 + ay1 + more '?
|
|
word farc + xa3 + yaB + aF + ax1 + ay2 + more
|
|
word farc + xa3 + ya7 + aD + ax1 + ay2 + more
|
|
word fline + xa2 + ya5 + xb2 + yb4
|
|
|
|
word farc + xa2 + ya8 + a0 + ax1 + ay1 + more '@
|
|
word farc + xa2 + ya8 + a4 + ax2 + ay3 + more
|
|
word farc + xa3 + ya8 + aF + ax1 + ay1 + more
|
|
word farc + xa2 + ya6 + aF + ax2 + ay1 + more
|
|
word fline + xa3 + ya7 + xb3 + yb9
|
|
|
|
word farc + xa2 + yaA + a8 + ax2 + ay2 + more 'A
|
|
word fline + xa0 + ya4 + xb0 + ybA + more
|
|
word fline + xa4 + ya4 + xb4 + ybA + more
|
|
word fline + xa0 + ya8 + xb4 + yb8
|
|
|
|
word farc + xa2 + yaA + aB + ax2 + ay2 + more 'B
|
|
word farc + xa2 + ya6 + aB + ax2 + ay2 + more
|
|
word fline + xa0 + ya4 + xb0 + ybC + more
|
|
word fline + xa0 + ya4 + xb2 + yb4 + more
|
|
word fline + xa0 + ya8 + xb2 + yb8 + more
|
|
word fline + xa0 + yaC + xb2 + ybC
|
|
|
|
word farc + xa2 + yaA + a8 + ax2 + ay2 + more 'C
|
|
word farc + xa2 + ya6 + aA + ax2 + ay2 + more
|
|
word fline + xa0 + ya6 + xb0 + ybA
|
|
|
|
word farc + xa2 + yaA + aC + ax2 + ay2 + more 'D
|
|
word farc + xa2 + ya6 + aF + ax2 + ay2 + more
|
|
word fline + xa0 + ya4 + xb0 + ybC + more
|
|
word fline + xa4 + ya6 + xb4 + ybA + more
|
|
word fline + xa0 + ya4 + xb2 + yb4 + more
|
|
word fline + xa0 + yaC + xb2 + ybC
|
|
|
|
word fline + xa0 + ya4 + xb0 + ybC + more 'E
|
|
word fline + xa0 + ya4 + xb4 + yb4 + more
|
|
word fline + xa0 + ya8 + xb3 + yb8 + more
|
|
word fline + xa0 + yaC + xb4 + ybC
|
|
|
|
word fline + xa0 + ya4 + xb0 + ybC + more 'F
|
|
word fline + xa0 + ya8 + xb3 + yb8 + more
|
|
word fline + xa0 + yaC + xb4 + ybC
|
|
|
|
word farc + xa2 + yaA + a8 + ax2 + ay2 + more 'G
|
|
word farc + xa2 + ya6 + aA + ax2 + ay2 + more
|
|
word fline + xa0 + ya6 + xb0 + ybA + more
|
|
word fline + xa4 + ya4 + xb4 + yb7 + more
|
|
word fline + xa3 + ya7 + xb4 + yb7
|
|
|
|
word fline + xa0 + ya4 + xb0 + ybC + more 'H
|
|
word fline + xa4 + ya4 + xb4 + ybC + more
|
|
word fline + xa0 + ya8 + xb4 + yb8
|
|
|
|
word fline + xa2 + ya4 + xb2 + ybC + more 'I
|
|
word fline + xa0 + ya4 + xb4 + yb4 + more
|
|
word fline + xa0 + yaC + xb4 + ybC
|
|
|
|
word farc + xa2 + ya6 + aA + ax2 + ay2 + more 'J
|
|
word fline + xa4 + ya6 + xb4 + ybC
|
|
|
|
word fline + xa0 + ya4 + xb0 + ybC + more 'K
|
|
word fline + xa4 + yaC + xb0 + yb8 + more
|
|
word fline + xa4 + ya4 + xb0 + yb8
|
|
|
|
word fline + xa0 + ya4 + xb0 + ybC + more 'L
|
|
word fline + xa0 + ya4 + xb4 + yb4
|
|
|
|
word fline + xa0 + ya4 + xb0 + ybC + more 'M
|
|
word fline + xa4 + ya4 + xb4 + ybC + more
|
|
word fline + xa2 + ya8 + xb0 + ybC + more
|
|
word fline + xa2 + ya8 + xb4 + ybC
|
|
|
|
word fline + xa0 + ya4 + xb0 + ybC + more 'N
|
|
word fline + xa4 + ya4 + xb4 + ybC + more
|
|
word fline + xa4 + ya4 + xb0 + ybC
|
|
|
|
word farc + xa2 + yaA + a8 + ax2 + ay2 + more '0
|
|
word farc + xa2 + ya6 + aA + ax2 + ay2 + more
|
|
word fline + xa0 + ya6 + xb0 + ybA + more
|
|
word fline + xa4 + ya6 + xb4 + ybA
|
|
|
|
word farc + xa2 + yaA + aB + ax2 + ay2 + more 'P
|
|
word fline + xa0 + ya4 + xb0 + ybC + more
|
|
word fline + xa0 + ya8 + xb2 + yb8 + more
|
|
word fline + xa0 + yaC + xb2 + ybC
|
|
|
|
word farc + xa2 + yaA + a8 + ax2 + ay2 + more 'Q
|
|
word farc + xa2 + ya6 + aA + ax2 + ay2 + more
|
|
word fline + xa0 + ya6 + xb0 + ybA + more
|
|
word fline + xa4 + ya6 + xb4 + ybA + more
|
|
word fline + xa2 + ya6 + xb4 + yb3
|
|
|
|
word farc + xa2 + yaA + aB + ax2 + ay2 + more 'R
|
|
word fline + xa0 + ya4 + xb0 + ybC + more
|
|
word fline + xa0 + ya8 + xb2 + yb8 + more
|
|
word fline + xa0 + yaC + xb2 + ybC + more
|
|
word fline + xa4 + ya4 + xb2 + yb8
|
|
|
|
word farc + xa2 + yaA + a4 + ax2 + ay2 + more 'S
|
|
word farc + xa2 + ya6 + a6 + ax2 + ay2
|
|
|
|
word fline + xa2 + ya4 + xb2 + ybC + more 'T
|
|
word fline + xa0 + yaC + xb4 + ybC
|
|
|
|
word farc + xa2 + ya6 + aA + ax2 + ay2 + more 'U
|
|
word fline + xa0 + ya6 + xb0 + ybC + more
|
|
word fline + xa4 + ya6 + xb4 + ybC
|
|
|
|
word fline + xa2 + ya4 + xb0 + ybC + more 'V
|
|
word fline + xa2 + ya4 + xb4 + ybC
|
|
|
|
word fline + xa0 + yaC + xb0 + yb4 + more 'W
|
|
word fline + xa4 + yaC + xb4 + yb4 + more
|
|
word fline + xa2 + ya8 + xb0 + yb4 + more
|
|
word fline + xa2 + ya8 + xb4 + yb4
|
|
|
|
word fline + xa4 + ya4 + xb0 + ybC + more 'X
|
|
word fline + xa0 + ya4 + xb4 + ybC
|
|
|
|
word fline + xa0 + yaC + xb2 + yb8 + more 'Y
|
|
word fline + xa4 + yaC + xb2 + yb8 + more
|
|
word fline + xa2 + ya4 + xb2 + yb8
|
|
|
|
word fline + xa0 + yaC + xb4 + ybC + more 'Z
|
|
word fline + xa0 + ya4 + xb4 + ybC + more
|
|
word fline + xa0 + ya4 + xb4 + yb4
|
|
|
|
word fline + xa2 + yaD + xb2 + yb3 + more '[
|
|
word fline + xa2 + yaD + xb4 + ybD + more
|
|
word fline + xa2 + ya3 + xb4 + yb3
|
|
|
|
word fline + xa4 + ya4 + xb0 + ybC '\
|
|
|
|
word fline + xa2 + yaD + xb2 + yb3 + more '[
|
|
word fline + xa2 + yaD + xb0 + ybD + more
|
|
word fline + xa2 + ya3 + xb0 + yb3
|
|
|
|
word fline + xa2 + yaA + xb0 + yb6 + more '^
|
|
word fline + xa2 + yaA + xb4 + yb6
|
|
|
|
word fline + xa0 + ya1 + xa4 + yb1 '_
|
|
|
|
word fline + xa1 + ya9 + xb3 + yb7 '`
|
|
|
|
word farc + xa2 + ya6 + a0 + ax2 + ay2 + more 'a
|
|
word fline + xa4 + ya4 + xb4 + yb8
|
|
|
|
word farc + xa2 + ya6 + a0 + ax2 + ay2 + more 'b
|
|
word fline + xa0 + ya4 + xb0 + ybC
|
|
|
|
word farc + xa2 + ya6 + a9 + ax2 + ay2 + more 'c
|
|
word fline + xa2 + ya4 + xb4 + yb4 + more
|
|
word fline + xa2 + ya8 + xb4 + yb8
|
|
|
|
word farc + xa2 + ya6 + a0 + ax2 + ay2 + more 'd
|
|
word fline + xa4 + ya4 + xb4 + ybC
|
|
|
|
word farc + xa2 + ya6 + a4 + ax2 + ay2 + more 'e
|
|
word fline + xa0 + ya6 + xb4 + yb6 + more
|
|
word fline + xa2 + ya4 + xb4 + yb4
|
|
|
|
word farc + xa4 + yaA + aD + ax2 + ay2 + more 'f
|
|
word fline + xa0 + ya8 + xb4 + yb8 + more
|
|
word fline + xa2 + ya4 + xb2 + ybA
|
|
|
|
word farc + xa2 + ya6 + a0 + ax2 + ay2 + more 'g
|
|
word farc + xa2 + ya3 + aF + ax2 + ay2 + more
|
|
word fline + xa4 + ya3 + xb4 + yb8 + more
|
|
word fline + xa1 + ya1 + xb2 + yb1
|
|
|
|
word farc + xa2 + ya6 + a8 + ax2 + ay2 + more 'h
|
|
word fline + xa0 + ya4 + xb0 + ybC + more
|
|
word fline + xa4 + ya4 + xb4 + yb6
|
|
|
|
word fline + xa1 + ya4 + xb3 + yb4 + more 'i
|
|
word fline + xa2 + ya4 + xb2 + yb8 + more
|
|
word fline + xa1 + ya8 + xb2 + yb8 + more
|
|
word fline + xa2 + yaB + xb2 + ybA
|
|
|
|
word farc + xa0 + ya3 + aF + ax2 + ay2 + more 'j
|
|
word fline + xa2 + ya3 + xb2 + yb8 + more
|
|
word fline + xa1 + ya8 + xb2 + yb8 + more
|
|
word fline + xa2 + yaB + xb2 + ybA
|
|
|
|
word fline + xa0 + ya4 + xb0 + ybC + more 'k
|
|
word fline + xa0 + ya6 + xb2 + yb6 + more
|
|
word fline + xa2 + ya6 + xb4 + yb8 + more
|
|
word fline + xa2 + ya6 + xb4 + yb4
|
|
|
|
word fline + xa1 + ya4 + xb3 + yb4 + more 'l
|
|
word fline + xa2 + ya4 + xb2 + ybC + more
|
|
word fline + xa1 + yaC + xb2 + ybC
|
|
|
|
word farc + xa1 + ya7 + a8 + ax1 + ay1 + more 'm
|
|
word farc + xa3 + ya7 + a8 + ax1 + ay1 + more
|
|
word fline + xa0 + ya4 + xb0 + yb8 + more
|
|
word fline + xa2 + ya4 + xb2 + yb7 + more
|
|
word fline + xa4 + ya4 + xb4 + yb7
|
|
|
|
word farc + xa2 + ya6 + a8 + ax2 + ay2 + more 'n
|
|
word fline + xa0 + ya4 + xb0 + yb8 + more
|
|
word fline + xa4 + ya4 + xb4 + yb6
|
|
|
|
word farc + xa2 + ya6 + a0 + ax2 + ay2 'o
|
|
|
|
word farc + xa2 + ya6 + a0 + ax2 + ay2 + more 'p
|
|
word fline + xa0 + ya1 + xb0 + yb8
|
|
|
|
word farc + xa2 + ya6 + a0 + ax2 + ay2 + more 'q
|
|
word fline + xa4 + ya1 + xb4 + yb8
|
|
|
|
word farc + xa2 + ya7 + a8 + ax2 + ay1 + more 'r
|
|
word fline + xa0 + ya4 + xb0 + yb8
|
|
|
|
word farc + xa2 + ya7 + a9 + ax2 + ay1 + more 's
|
|
word farc + xa2 + ya5 + aB + ax2 + ay1 + more
|
|
word fline + xa0 + ya4 + xb2 + yb4 + more
|
|
word fline + xa2 + ya8 + xb4 + yb8
|
|
|
|
word farc + xa4 + ya6 + aE + ax2 + ay2 + more 't
|
|
word fline + xa0 + ya8 + xb4 + yb8 + more
|
|
word fline + xa2 + ya6 + xb2 + ybA
|
|
|
|
word farc + xa2 + ya6 + aA + ax2 + ay2 + more 'u
|
|
word fline + xa0 + ya6 + xb0 + yb8 + more
|
|
word fline + xa4 + ya4 + xb4 + yb8
|
|
|
|
word fline + xa0 + ya8 + xb2 + yb4 + more 'v
|
|
word fline + xa4 + ya8 + xb2 + yb4
|
|
|
|
word farc + xa1 + ya5 + aA + ax1 + ay1 + more 'w
|
|
word farc + xa3 + ya5 + aA + ax1 + ay1 + more
|
|
word fline + xa0 + ya5 + xb0 + yb8 + more
|
|
word fline + xa2 + ya5 + xb2 + yb6 + more
|
|
word fline + xa4 + ya5 + xb4 + yb8
|
|
|
|
word fline + xa0 + ya8 + xb4 + yb4 + more 'x
|
|
word fline + xa0 + ya4 + xb4 + yb8
|
|
|
|
word farc + xa2 + ya6 + aA + ax2 + ay2 + more 'y
|
|
word farc + xa2 + ya3 + aF + ax2 + ay2 + more
|
|
word fline + xa4 + ya3 + xb4 + yb8 + more
|
|
word fline + xa0 + ya6 + xb0 + yb8 + more
|
|
word fline + xa1 + ya1 + xb2 + yb1
|
|
|
|
word fline + xa0 + ya8 + xb4 + yb8 + more 'z
|
|
word fline + xa4 + ya8 + xb0 + yb4 + more
|
|
word fline + xa0 + ya4 + xb4 + yb4
|
|
|
|
word farc + xa3 + yaA + aD + ax1 + ay3 + more '{
|
|
word farc + xa1 + ya6 + aC + ax1 + ay2 + more
|
|
word farc + xa1 + yaA + aF + ax1 + ay2 + more
|
|
word farc + xa3 + ya6 + aE + ax1 + ay3
|
|
|
|
word fline + xa2 + ya3 + xb2 + ybD '|
|
|
|
|
word farc + xa1 + yaA + aC + ax1 + ay3 + more '}
|
|
word farc + xa3 + ya6 + aD + ax1 + ay2 + more
|
|
word farc + xa3 + yaA + aE + ax1 + ay2 + more
|
|
word farc + xa1 + ya6 + aF + ax1 + ay3
|
|
|
|
word farc + xa1 + ya8 + a8 + ax1 + ay1 + more '~
|
|
word farc + xa3 + ya8 + aA + ax1 + ay1
|
|
|
|
' Vector font - custom characters ($7F+)
|
|
|
|
word fline + xa2 + ya9 + xb0 + yb4 + more 'delta
|
|
word fline + xa2 + ya9 + xb4 + yb4 + more
|
|
word fline + xa0 + ya4 + xb4 + yb4
|
|
|
|
word farc + xa2 + ya7 + a8 + ax2 + ay2 + more 'omega
|
|
word farc + xa1 + ya7 + aE + ax1 + ay2 + more
|
|
word farc + xa3 + ya7 + aF + ax1 + ay2 + more
|
|
word fline + xa1 + ya5 + xb1 + yb4 + more
|
|
word fline + xa3 + ya5 + xb3 + yb4 + more
|
|
word fline + xa0 + ya4 + xb1 + yb4 + more
|
|
word fline + xa4 + ya4 + xb3 + yb4
|
|
|
|
word farc + xa2 + ya8 + a0 + ax1 + ay1 'bullet
|
|
|
|
CON fx = 3 'number of custom characters
|
|
|
|
DAT
|
|
|
|
'*************************************
|
|
'* Assembly language graphics driver *
|
|
'*************************************
|
|
|
|
org
|
|
'
|
|
'
|
|
' Graphics driver - main loop
|
|
'
|
|
loop rdlong t1,par wz 'wait for command
|
|
if_z jmp #loop
|
|
|
|
movd :arg,#arg0 'get 8 arguments
|
|
mov t2,t1
|
|
mov t3,#8
|
|
:arg rdlong arg0,t2
|
|
add :arg,d0
|
|
add t2,#4
|
|
djnz t3,#:arg
|
|
|
|
wrlong zero,par 'zero command to signify received
|
|
|
|
call #setd 'set dx,dy from arg0,arg1
|
|
|
|
ror t1,#16+2 'lookup command address
|
|
add t1,#jumps
|
|
movs :table,t1
|
|
rol t1,#2
|
|
shl t1,#3
|
|
:table mov t2,0
|
|
shr t2,t1
|
|
and t2,#$FF
|
|
jmp t2 'jump to command
|
|
|
|
|
|
jumps byte 0 '0
|
|
byte setup_ '1
|
|
byte color_ '2
|
|
byte width_ '3
|
|
byte plot_ '4
|
|
byte line_ '5
|
|
byte arc_ '6
|
|
byte vec_ '7
|
|
byte vecarc_ '8
|
|
byte pix_ '9
|
|
byte pixarc_ 'A
|
|
byte text_ 'B
|
|
byte textarc_ 'C
|
|
byte textmode_ 'D
|
|
byte fill_ 'E
|
|
byte loop 'F
|
|
'
|
|
'
|
|
' setup(x_tiles, y_tiles*16, x_origin, y_origin, base_ptr) bases_ptr, slices_ptr
|
|
'
|
|
setup_ mov xlongs,arg0 'set xlongs, ylongs
|
|
mov ylongs,arg1
|
|
mov xorigin,arg2 'set xorigin, yorigin
|
|
mov yorigin,arg3
|
|
mov basesptr,arg5 'set pointers
|
|
mov slicesptr,arg6
|
|
|
|
jmp #loop
|
|
'
|
|
'
|
|
' color(c)
|
|
'
|
|
color_ mov pcolor,arg0 'set pixel color
|
|
|
|
jmp #loop
|
|
'
|
|
'
|
|
' width(w) pixel_passes
|
|
'
|
|
width_ mov pwidth,arg0 'set pixel width
|
|
mov passes,arg1 'set pixel passes
|
|
|
|
jmp #loop
|
|
'
|
|
'
|
|
' plot(x, y)
|
|
'
|
|
plot_ call #plotd
|
|
|
|
jmp #loop
|
|
'
|
|
'
|
|
' line(x, y)
|
|
'
|
|
line_ call #linepd
|
|
|
|
jmp #loop
|
|
'
|
|
'
|
|
' arc(x, y, xr, yr, angle, anglestep, iterations, mode)
|
|
'
|
|
arc_ and arg7,#3 'limit mode
|
|
|
|
:loop call #arca 'get arc dx,dy
|
|
|
|
cmp arg7,#1 wz 'if not mode 1, set px,py
|
|
if_nz mov px,dx
|
|
if_nz mov py,dy
|
|
|
|
tjz arg6,#loop 'if no points exit with new px,py
|
|
|
|
cmp arg7,#3 wz 'if mode 3, set center
|
|
if_z call #setd
|
|
|
|
test arg7,#1 wz 'if mode 0 or 2, plot point
|
|
if_z call #plotp
|
|
|
|
test arg7,#1 wz 'if mode 1 or 3, plot line
|
|
if_nz call #linepd
|
|
|
|
cmp arg7,#2 wz 'if mode 2, set mode 1
|
|
if_z mov arg7,#1
|
|
|
|
add arg4,arg5 'step angle
|
|
djnz arg6,#:loop 'loop if more iterations
|
|
|
|
jmp #loop
|
|
'
|
|
'
|
|
' vec(x, y, vecscale, vecangle, vecdef_ptr)
|
|
' vecarc(x, y, xr, yr, angle, vecscale, vecangle, vecdef_ptr)
|
|
'
|
|
' vecdef: word $8000/$4000+angle 'vector mode + 13-bit angle (mode: $4000=plot, $8000=line)
|
|
' word length 'vector length
|
|
' ... 'more vectors
|
|
' ...
|
|
' word 0 'end of definition
|
|
'
|
|
vecarc_ call #arcmod
|
|
|
|
vec_ tjz arg2,#loop 'if scale 0, exit
|
|
|
|
:loop rdword t7,arg4 wz 'get vector mode+angle
|
|
add arg4,#2
|
|
|
|
if_z jmp #loop 'if mode+angle 0, exit
|
|
|
|
rdword t1,arg4 'get vector length
|
|
add arg4,#2
|
|
|
|
abs t2,arg2 wc 'add/sub vector angle to/from angle
|
|
mov t6,arg3
|
|
sumc t6,t7
|
|
|
|
call #multiply 'multiply length by scale
|
|
add t1,#$80 'round up 1/2 lsb
|
|
shr t1,#8
|
|
|
|
mov t4,t1 'get arc dx,dy
|
|
mov t5,t1
|
|
call #arcd
|
|
|
|
test t7,h8000 wc 'plot pixel or draw line?
|
|
if_nc call #plotd
|
|
test t7,h8000 wc
|
|
if_c call #linepd
|
|
|
|
jmp #:loop 'get next vector
|
|
'
|
|
'
|
|
' pix(x, y, pixrot, pixdef_ptr)
|
|
' pixarc(x, y, xr, yr, angle, pixrot, pixdef_ptr)
|
|
'
|
|
' pixdef: word
|
|
' byte xwords, ywords, xorigin, yorigin
|
|
' word %%xxxxxxxx,%%xxxxxxxx
|
|
' word %%xxxxxxxx,%%xxxxxxxx
|
|
' word %%xxxxxxxx,%%xxxxxxxx
|
|
' ...
|
|
'
|
|
pixarc_ call #arcmod
|
|
|
|
pix_ mov t6,pcolor 'save color
|
|
|
|
mov px,dx 'get center into px,py
|
|
mov py,dy
|
|
|
|
mov sy,pwidth 'get actual pixel width
|
|
add sy,#1
|
|
|
|
rdbyte dx,arg3 'get dimensions into dx,dy
|
|
add arg3,#1
|
|
rdbyte dy,arg3
|
|
add arg3,#1
|
|
|
|
rdbyte t1,arg3 'get origin and adjust px,py
|
|
add arg3,#1
|
|
rdbyte t2,arg3
|
|
add arg3,#1
|
|
neg t2,t2
|
|
sub t2,#1
|
|
add t2,dy
|
|
mov t3,sy
|
|
:adjust test arg2,#%001 wz
|
|
test arg2,#%110 wc
|
|
if_z sumnc px,t1
|
|
if_nz sumc py,t1
|
|
test arg2,#%010 wc
|
|
if_nz sumnc px,t2
|
|
if_z sumnc py,t2
|
|
djnz t3,#:adjust
|
|
|
|
:yline mov sx,#0 'plot entire pix
|
|
mov t3,dx
|
|
:xword rdword t4,arg3 'read next pix word
|
|
add arg3,#2
|
|
shl t4,#16
|
|
mov t5,#8
|
|
:xpixel rol t4,#2 'plot pixel within word
|
|
test t4,#1 wc 'set color
|
|
muxc pcolor,color1
|
|
test t4,#2 wc
|
|
muxc pcolor,color2 wz '(z=1 if color=0)
|
|
if_nz call #plotp
|
|
test arg2,#%001 wz 'update px,py for next x
|
|
test arg2,#%110 wc
|
|
if_z sumc px,sy
|
|
if_nz sumnc py,sy
|
|
add sx,sy
|
|
djnz t5,#:xpixel 'another x pixel?
|
|
djnz t3,#:xword 'another x word?
|
|
if_z sumnc px,sx 'update px,py for next y
|
|
if_nz sumc py,sx
|
|
test arg2,#%010 wc
|
|
if_nz sumc px,sy
|
|
if_z sumc py,sy
|
|
djnz dy,#:yline 'another y line?
|
|
|
|
mov pcolor,t6 'restore color
|
|
|
|
jmp #loop
|
|
'
|
|
'
|
|
' text(x, y, @string) justx, justy
|
|
' textarc(x, y, xr, yr, angle, @string) justx, justy
|
|
'
|
|
textarc_ call #arcmod
|
|
|
|
text_ add arg3,arg0 'add x into justx
|
|
add arg4,arg1 'add y into justy
|
|
|
|
:chr rdbyte t1,arg2 wz 'get chr
|
|
add arg2,#1
|
|
|
|
if_z jmp #loop 'if 0, done
|
|
|
|
sub t1,#$21 'if chr out of range, skip
|
|
cmp t1,#$7F-$21+fx wc
|
|
if_nc jmp #:skip
|
|
|
|
mov arg5,fontptr 'scan font for chr definition
|
|
:scan tjz t1,#:def
|
|
rdword t2,arg5
|
|
add arg5,#2
|
|
test t2,h8000 wc
|
|
if_nc sub t1,#1
|
|
jmp #:scan
|
|
|
|
:def rdword t7,arg5 'get font definition word
|
|
add arg5,#2
|
|
|
|
call #fontxy 'extract initial x,y
|
|
|
|
test t7,#$80 wc 'arc or line?
|
|
if_nc jmp #:line
|
|
|
|
|
|
mov t2,textsx 'arc, extract x radius
|
|
mov t3,#%0001_0001_1
|
|
call #fontb
|
|
mov t4,t1
|
|
|
|
mov t2,textsy 'extract y radius
|
|
mov t3,#%0010_0011_1
|
|
call #fontb
|
|
mov t5,t1
|
|
|
|
mov t2,#1 'extract starting angle
|
|
mov t3,#%0010_0011_0
|
|
call #fontb
|
|
shl t1,#11
|
|
|
|
mov t6,t1 'extract angle sweep
|
|
mov t3,#%0010_0011_0
|
|
call #fontb
|
|
neg arg6,t1
|
|
shl arg6,#4
|
|
add arg6,#65
|
|
|
|
call #arcd 'plot initial arc point
|
|
call #plotd
|
|
|
|
:arc call #arcd 'connect subsequent arc points with lines
|
|
call #linepd
|
|
add t6,#$80
|
|
djnz arg6,#:arc
|
|
|
|
jmp #:more
|
|
|
|
|
|
:line call #plotd 'line, plot initial x,y
|
|
|
|
call #fontxy 'extract terminal x,y
|
|
|
|
call #linepd 'draw line
|
|
|
|
|
|
:more test t7,#$02 wc 'more font definition?
|
|
if_c jmp #:def
|
|
|
|
:skip mov t1,textsp 'advance x to next chr position
|
|
mov t2,textsx
|
|
call #multiply
|
|
add arg3,t1
|
|
|
|
jmp #:chr 'get next chr
|
|
|
|
|
|
fontxy mov t2,textsx 'extract x
|
|
mov t3,#%0011_0111_0
|
|
call #fontb
|
|
mov arg0,t1
|
|
add arg0,arg3
|
|
|
|
mov t2,textsy 'extract y
|
|
mov t3,#%0100_1111_0
|
|
call #fontb
|
|
mov arg1,t1
|
|
add arg1,arg4
|
|
|
|
setd mov dx,xorigin 'set dx,dy from arg0,arg1
|
|
add dx,arg0
|
|
mov dy,yorigin
|
|
sub dy,arg1
|
|
setd_ret
|
|
fontxy_ret ret
|
|
|
|
|
|
fontb mov t1,t7 'extract bitrange from font word
|
|
shr t3,#1 wc
|
|
and t1,t3
|
|
if_c add t1,#1
|
|
shr t3,#4
|
|
shr t7,t3
|
|
|
|
shl t1,#32-4 'multiply t1[3..0] by t2
|
|
mov t3,#4
|
|
:loop shl t1,#1 wc
|
|
if_c add t1,t2
|
|
djnz t3,#:loop
|
|
|
|
fontb_ret ret
|
|
'
|
|
'
|
|
' textmode(x_scale, y_scale, spacing, justification)
|
|
'
|
|
textmode_ mov textsx,arg0 'set text x scale
|
|
mov textsy,arg1 'set text y scale
|
|
mov textsp,arg2 'set text spacing
|
|
|
|
jmp #loop
|
|
'
|
|
'
|
|
' fill(x, y, da, db, db2, linechange, lines_minus_1)
|
|
'
|
|
fill_ shl dx,#16 'get left and right fractions
|
|
or dx,h8000
|
|
mov t1,dx
|
|
|
|
mov t2,xlongs 'get x pixels
|
|
shl t2,#4
|
|
|
|
add arg6,#1 'pre-increment line counter
|
|
|
|
:yloop add dx,arg2 'adjust left and right fractions
|
|
add t1,arg3
|
|
|
|
cmps dx,t1 wc 'get left and right integers
|
|
if_c mov base0,dx
|
|
if_c mov base1,t1
|
|
if_nc mov base0,t1
|
|
if_nc mov base1,dx
|
|
sar base0,#16
|
|
sar base1,#16
|
|
|
|
cmps base0,t2 wc 'left out of range?
|
|
if_c cmps hFFFFFFFF,base1 wc 'right out of range?
|
|
if_c cmp dy,ylongs wc 'y out of range?
|
|
if_nc jmp #:skip 'if any, skip
|
|
|
|
mins base0,#0 'limit left and right
|
|
maxs base1,t2 wc
|
|
if_nc sub base1,#1
|
|
|
|
shl base0,#1 'make left mask
|
|
neg mask0,#1
|
|
shl mask0,base0
|
|
shr base0,#5
|
|
|
|
shl base1,#1 'make right mask
|
|
xor base1,#$1E
|
|
neg mask1,#1
|
|
shr mask1,base1
|
|
shr base1,#5
|
|
|
|
sub base1,base0 wz 'ready long count
|
|
add base1,#1
|
|
|
|
if_z and mask0,mask1 'if single long, merge masks
|
|
|
|
shl base0,#1 'get long base
|
|
add base0,basesptr
|
|
rdword base0,base0
|
|
shl dy,#2
|
|
add base0,dy
|
|
shr dy,#2
|
|
|
|
mov bits0,mask0 'ready left mask
|
|
:xloop mov bits1,pcolor 'make color mask
|
|
and bits1,bits0
|
|
rdlong pass,base0 'read-modify-write long
|
|
andn pass,bits0
|
|
or pass,bits1
|
|
wrlong pass,base0
|
|
shl ylongs,#2 'advance to next long
|
|
add base0,ylongs
|
|
shr ylongs,#2
|
|
cmp base1,#2 wz 'one more?
|
|
if_nz neg bits0,#1 'if not, ready full mask
|
|
if_z mov bits0,mask1 'if one more, ready right mask
|
|
djnz base1,#:xloop 'loop if more longs
|
|
|
|
:skip sub arg5,#1 wc 'delta change?
|
|
if_c mov arg3,arg4 'if so, set new deltas
|
|
:same
|
|
add dy,#1 'adjust y
|
|
djnz arg6,#:yloop 'another y?
|
|
|
|
jmp #loop
|
|
'
|
|
'
|
|
' Plot line from px,py to dx,dy
|
|
'
|
|
linepd cmps dx,px wc, wr 'get x difference
|
|
negc sx,#1 'set x direction
|
|
|
|
cmps dy,py wc, wr 'get y difference
|
|
negc sy,#1 'set y direction
|
|
|
|
abs dx,dx 'make differences absolute
|
|
abs dy,dy
|
|
|
|
cmp dx,dy wc 'determine dominant axis
|
|
if_nc tjz dx,#:last 'if both differences 0, plot single pixel
|
|
if_nc mov count,dx 'set pixel count
|
|
if_c mov count,dy
|
|
mov ratio,count 'set initial ratio
|
|
shr ratio,#1
|
|
if_c jmp #:yloop 'x or y dominant?
|
|
|
|
|
|
:xloop call #plotp 'dominant x line
|
|
add px,sx
|
|
sub ratio,dy wc
|
|
if_c add ratio,dx
|
|
if_c add py,sy
|
|
djnz count,#:xloop
|
|
|
|
jmp #:last 'plot last pixel
|
|
|
|
|
|
:yloop call #plotp 'dominant y line
|
|
add py,sy
|
|
sub ratio,dx wc
|
|
if_c add ratio,dy
|
|
if_c add px,sx
|
|
djnz count,#:yloop
|
|
|
|
:last call #plotp 'plot last pixel
|
|
|
|
linepd_ret ret
|
|
'
|
|
'
|
|
' Plot pixel at px,py
|
|
'
|
|
plotd mov px,dx 'set px,py to dx,dy
|
|
mov py,dy
|
|
|
|
plotp tjnz pwidth,#wplot 'if width > 0, do wide plot
|
|
|
|
mov t1,px 'compute pixel mask
|
|
shl t1,#1
|
|
mov mask0,#%11
|
|
shl mask0,t1
|
|
shr t1,#5
|
|
|
|
cmp t1,xlongs wc 'if x or y out of bounds, exit
|
|
if_c cmp py,ylongs wc
|
|
if_nc jmp #plotp_ret
|
|
|
|
mov bits0,pcolor 'compute pixel bits
|
|
and bits0,mask0
|
|
|
|
shl t1,#1 'get address of pixel long
|
|
add t1,basesptr
|
|
mov t2,py
|
|
rdword t1,t1
|
|
shl t2,#2
|
|
add t1,t2
|
|
|
|
rdlong t2,t1 'write pixel
|
|
andn t2,mask0
|
|
or t2,bits0
|
|
wrlong t2,t1
|
|
plotp_ret
|
|
plotd_ret ret
|
|
'
|
|
'
|
|
' Plot wide pixel
|
|
'
|
|
wplot mov t1,py 'if y out of bounds, exit
|
|
add t1,#7
|
|
mov t2,ylongs
|
|
add t2,#7+8
|
|
cmp t1,t2 wc
|
|
if_nc jmp #plotp_ret
|
|
|
|
mov t1,px 'determine x long pair
|
|
sub t1,#8
|
|
sar t1,#4
|
|
cmp t1,xlongs wc
|
|
muxc jumps,#%01 '(use jumps[1..0] to store writes)
|
|
add t1,#1
|
|
cmp t1,xlongs wc
|
|
muxc jumps,#%10
|
|
|
|
test jumps,#%11 wz 'if x out of bounds, exit
|
|
if_z jmp #plotp_ret
|
|
|
|
shl t1,#1 'get base pair
|
|
add t1,basesptr
|
|
rdword base1,t1
|
|
sub t1,#2
|
|
rdword base0,t1
|
|
|
|
mov t1,px 'determine pair shifts
|
|
shl t1,#1
|
|
movs :shift1,t1
|
|
xor :shift1,#7<<1
|
|
add t1,#9<<1
|
|
movs :shift0,t1
|
|
test t1,#$F<<1 wz '(account for special case)
|
|
if_z andn jumps,#%01
|
|
|
|
mov pass,#0 'ready to plot slices
|
|
mov slice,slicesptr
|
|
|
|
:loop rdlong mask0,slice 'get next slice
|
|
mov mask1,mask0
|
|
|
|
:shift0 shl mask0,#0 'position slice
|
|
:shift1 shr mask1,#0
|
|
|
|
mov bits0,pcolor 'colorize slice
|
|
and bits0,mask0
|
|
mov bits1,pcolor
|
|
and bits1,mask1
|
|
|
|
mov t1,py 'plot lower slice
|
|
add t1,pass
|
|
cmp t1,ylongs wc
|
|
if_c call #wslice
|
|
|
|
mov t1,py 'plot upper slice
|
|
test pwidth,#1 wc
|
|
subx t1,pass
|
|
cmp t1,ylongs wc
|
|
if_c call #wslice
|
|
|
|
add slice,#4 'next slice
|
|
add pass,#1
|
|
cmp pass,passes wz
|
|
if_nz jmp #:loop
|
|
|
|
jmp #plotp_ret
|
|
'
|
|
'
|
|
' Plot wide pixel slice
|
|
'
|
|
wslice shl t1,#2 'ready long offset
|
|
|
|
add base0,t1 'plot left slice
|
|
test jumps,#%01 wc
|
|
if_c rdlong t2,base0
|
|
if_c andn t2,mask0
|
|
if_c or t2,bits0
|
|
if_c wrlong t2,base0
|
|
|
|
add base1,t1 'plot right slice
|
|
test jumps,#%10 wc
|
|
if_c rdlong t2,base1
|
|
if_c andn t2,mask1
|
|
if_c or t2,bits1
|
|
if_c wrlong t2,base1
|
|
|
|
sub base0,t1 'restore bases
|
|
sub base1,t1
|
|
|
|
wslice_ret ret
|
|
'
|
|
'
|
|
' Get arc point from args and then move args 5..7 to 2..4
|
|
'
|
|
arcmod call #arca 'get arc using first 5 args
|
|
|
|
mov arg0,dx 'set arg0,arg1
|
|
sub arg0,xorigin
|
|
mov arg1,yorigin
|
|
sub arg1,dy
|
|
|
|
mov arg2,arg5 'move args 5..7 to 2..4
|
|
mov arg3,arg6
|
|
mov arg4,arg7
|
|
|
|
arcmod_ret ret
|
|
'
|
|
'
|
|
' Get arc dx,dy from arg0,arg1
|
|
'
|
|
' in: arg0,arg1 = center x,y
|
|
' arg2/t4 = x length
|
|
' arg3/t5 = y length
|
|
' arg4/t6 = 13-bit angle
|
|
'
|
|
' out: dx,dy = arc point
|
|
'
|
|
arca mov t4,arg2 'use args
|
|
mov t5,arg3
|
|
mov t6,arg4
|
|
|
|
arcd call #setd 'reset dx,dy to arg0,arg1
|
|
|
|
mov t1,t6 'get arc dx
|
|
mov t2,t4
|
|
call #polarx
|
|
add dx,t1
|
|
|
|
mov t1,t6 'get arc dy
|
|
mov t2,t5
|
|
call #polary
|
|
sub dy,t1
|
|
arcd_ret
|
|
arca_ret ret
|
|
'
|
|
'
|
|
' Polar to cartesian
|
|
'
|
|
' in: t1 = 13-bit angle
|
|
' t2 = 16-bit length
|
|
'
|
|
' out: t1 = x|y
|
|
'
|
|
polarx add t1,sine_90 'cosine, add 90° for sine lookup
|
|
polary test t1,sine_180 wz 'get sine quadrant 3|4 into nz
|
|
test t1,sine_90 wc 'get sine quadrant 2|4 into c
|
|
negc t1,t1 'if sine quadrant 2|4, negate table offset
|
|
or t1,sine_table 'or in sine table address >> 1
|
|
shl t1,#1 'shift left to get final word address
|
|
rdword t1,t1 'read sine/cosine word
|
|
call #multiply 'multiply sine/cosine by length to get x|y
|
|
add t1,h8000 'add 1/2 lsb to round up x|y fraction
|
|
shr t1,#16 'justify x|y integer
|
|
negnz t1,t1 'if sine quadrant 3|4, negate x|y
|
|
polary_ret
|
|
polarx_ret ret
|
|
|
|
sine_90 long $0800 '90° bit
|
|
sine_180 long $1000 '180° bit
|
|
sine_table long $E000 >> 1 'sine table address shifted right
|
|
'
|
|
'
|
|
' Multiply
|
|
'
|
|
' in: t1 = 16-bit multiplicand (t1[31..16] must be 0)
|
|
' t2 = 16-bit multiplier
|
|
'
|
|
' out: t1 = 32-bit product
|
|
'
|
|
multiply mov t3,#16
|
|
shl t2,#16
|
|
shr t1,#1 wc
|
|
|
|
:loop if_c add t1,t2 wc
|
|
rcr t1,#1 wc
|
|
djnz t3,#:loop
|
|
|
|
multiply_ret ret
|
|
'
|
|
'
|
|
' Defined data
|
|
'
|
|
zero long 0 'constants
|
|
d0 long $200
|
|
h8000 long $8000
|
|
hFFFFFFFF long $FFFFFFFF
|
|
color1 long %%1111111111111111
|
|
color2 long %%2222222222222222
|
|
|
|
fontptr long 0 'font pointer (set before cognew command)
|
|
|
|
pcolor long %%1111111111111111 'pixel color
|
|
pwidth long 0 'pixel width
|
|
passes long 1 'pixel passes
|
|
textsx long 1 'text scale x
|
|
textsy long 1 'text scale y
|
|
textsp long 6 'text spacing
|
|
'
|
|
'
|
|
' Undefined data
|
|
'
|
|
t1 res 1 'temps
|
|
t2 res 1
|
|
t3 res 1
|
|
t4 res 1
|
|
t5 res 1
|
|
t6 res 1
|
|
t7 res 1
|
|
|
|
arg0 res 1 'arguments passed from high-level
|
|
arg1 res 1
|
|
arg2 res 1
|
|
arg3 res 1
|
|
arg4 res 1
|
|
arg5 res 1
|
|
arg6 res 1
|
|
arg7 res 1
|
|
|
|
basesptr res 1 'pointers
|
|
slicesptr res 1
|
|
|
|
xlongs res 1 'bitmap metrics
|
|
ylongs res 1
|
|
xorigin res 1
|
|
yorigin res 1
|
|
|
|
dx res 1 'line/plot coordinates
|
|
dy res 1
|
|
px res 1
|
|
py res 1
|
|
|
|
sx res 1 'line
|
|
sy res 1
|
|
count res 1
|
|
ratio res 1
|
|
|
|
pass res 1 'plot
|
|
slice res 1
|
|
base0 res 1
|
|
base1 res 1
|
|
mask0 res 1
|
|
mask1 res 1
|
|
bits0 res 1
|
|
bits1 res 1
|
|
|
|
{{
|
|
|
|
┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
|
|
│ TERMS OF USE: MIT License │
|
|
├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
|
|
│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation │
|
|
│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, │
|
|
│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
|
|
│is furnished to do so, subject to the following conditions: │
|
|
│ │
|
|
│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
|
|
│ │
|
|
│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE │
|
|
│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR │
|
|
│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │
|
|
│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
|
|
└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
|
|
}} |