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557 lines
21 KiB
557 lines
21 KiB
# some primitives for moving the cursor without making assumptions about |
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# raster order |
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fn move-cursor-left screen: (addr screen) { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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compare cursor-x, 0 |
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{ |
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break-if-> |
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return |
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} |
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cursor-x <- decrement |
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set-cursor-position screen, cursor-x, cursor-y |
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} |
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|
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fn move-cursor-right screen: (addr screen) { |
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var _width/eax: int <- copy 0 |
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var dummy/ecx: int <- copy 0 |
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_width, dummy <- screen-size screen |
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var limit/edx: int <- copy _width |
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limit <- decrement |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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compare cursor-x, limit |
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{ |
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break-if-< |
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return |
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} |
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cursor-x <- increment |
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set-cursor-position screen, cursor-x, cursor-y |
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} |
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|
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fn move-cursor-up screen: (addr screen) { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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compare cursor-y, 0 |
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{ |
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break-if-> |
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return |
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} |
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cursor-y <- decrement |
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set-cursor-position screen, cursor-x, cursor-y |
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} |
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|
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fn move-cursor-down screen: (addr screen) { |
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var dummy/eax: int <- copy 0 |
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var _height/ecx: int <- copy 0 |
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dummy, _height <- screen-size screen |
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var limit/edx: int <- copy _height |
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limit <- decrement |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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compare cursor-y, limit |
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{ |
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break-if-< |
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return |
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} |
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cursor-y <- increment |
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set-cursor-position screen, cursor-x, cursor-y |
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} |
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|
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fn move-cursor-to-left-margin-of-next-line screen: (addr screen) { |
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var dummy/eax: int <- copy 0 |
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var _height/ecx: int <- copy 0 |
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dummy, _height <- screen-size screen |
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var limit/edx: int <- copy _height |
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limit <- decrement |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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compare cursor-y, limit |
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{ |
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break-if-< |
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return |
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} |
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cursor-y <- increment |
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cursor-x <- copy 0 |
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set-cursor-position screen, cursor-x, cursor-y |
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} |
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|
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fn draw-code-point-at-cursor-over-full-screen screen: (addr screen), c: code-point, color: int, background-color: int { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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var _offset/eax: int <- draw-code-point screen, c, cursor-x, cursor-y, color, background-color |
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var offset/edx: int <- copy _offset |
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var width/eax: int <- copy 0 |
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var dummy/ecx: int <- copy 0 |
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width, dummy <- screen-size screen |
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move-cursor-rightward-and-downward screen, 0 width |
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offset <- decrement |
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compare offset, 0 |
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{ |
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break-if-= |
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# should never move downward here |
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move-cursor-rightward-and-downward screen, 0 width |
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} |
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} |
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# draw a single line of text from x, y to xmax |
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# return the next 'x' coordinate |
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# if there isn't enough space, truncate |
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fn draw-text-rightward screen: (addr screen), text: (addr array byte), x: int, xmax: int, y: int, color: int, background-color: int -> _/eax: int { |
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var stream-storage: (stream byte 0x400/print-buffer-size) |
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var stream/esi: (addr stream byte) <- address stream-storage |
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write stream, text |
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var xcurr/eax: int <- draw-stream-rightward screen, stream, x, xmax, y, color, background-color |
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return xcurr |
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} |
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|
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# draw a single-line stream from x, y to xmax |
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# return the next 'x' coordinate |
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# if there isn't enough space, truncate |
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fn draw-stream-rightward screen: (addr screen), stream: (addr stream byte), x: int, xmax: int, y: int, color: int, background-color: int -> _/eax: int { |
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var xcurr/ecx: int <- copy x |
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{ |
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var g/eax: code-point-utf8 <- read-code-point-utf8 stream |
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compare g, 0xffffffff/end-of-file |
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break-if-= |
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var c/eax: code-point <- to-code-point g |
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var offset/eax: int <- draw-code-point screen, c, xcurr, y, color, background-color |
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xcurr <- add offset |
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loop |
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} |
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set-cursor-position screen, xcurr, y |
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return xcurr |
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} |
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fn draw-text-rightward-over-full-screen screen: (addr screen), text: (addr array byte), x: int, y: int, color: int, background-color: int -> _/eax: int { |
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var width/eax: int <- copy 0 |
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var height/ecx: int <- copy 0 |
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width, height <- screen-size screen |
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var result/eax: int <- draw-text-rightward screen, text, x, width, y, color, background-color |
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return result |
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} |
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fn draw-text-rightward-from-cursor screen: (addr screen), text: (addr array byte), xmax: int, color: int, background-color: int { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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cursor-x <- draw-text-rightward screen, text, cursor-x, xmax, cursor-y, color, background-color |
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set-cursor-position screen, cursor-x, cursor-y |
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} |
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fn draw-text-rightward-from-cursor-over-full-screen screen: (addr screen), text: (addr array byte), color: int, background-color: int { |
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var width/eax: int <- copy 0 |
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var height/ecx: int <- copy 0 |
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width, height <- screen-size screen |
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draw-text-rightward-from-cursor screen, text, width, color, background-color |
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} |
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fn render-code-point screen: (addr screen), c: code-point, xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var x/ecx: int <- copy x |
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compare c, 0xa/newline |
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{ |
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break-if-!= |
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# minimum effort to clear cursor |
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var dummy/eax: int <- draw-code-point screen, 0x20/space, x, y, color, background-color |
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x <- copy xmin |
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increment y |
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return x, y |
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} |
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var offset/eax: int <- draw-code-point screen, c, x, y, color, background-color |
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x <- add offset |
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compare x, xmax |
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{ |
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break-if-< |
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x <- copy xmin |
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increment y |
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} |
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return x, y |
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} |
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# draw text in the rectangle from (xmin, ymin) to (xmax, ymax), starting from (x, y), wrapping as necessary |
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# return the next (x, y) coordinate in raster order where drawing stopped |
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# that way the caller can draw more if given the same min and max bounding-box. |
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# if there isn't enough space, truncate |
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fn draw-text-wrapping-right-then-down screen: (addr screen), _text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, _x: int, _y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var stream-storage: (stream byte 0x200/print-buffer-size) |
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var stream/edi: (addr stream byte) <- address stream-storage |
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var text/esi: (addr array byte) <- copy _text |
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var len/eax: int <- length text |
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compare len, 0x200/print-buffer-size |
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{ |
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break-if-< |
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write stream, "ERROR: stream too small in draw-text-wrapping-right-then-down" |
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} |
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compare len, 0x200/print-buffer-size |
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{ |
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break-if->= |
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write stream, text |
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} |
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var x/eax: int <- copy _x |
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var y/ecx: int <- copy _y |
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x, y <- draw-stream-wrapping-right-then-down screen, stream, xmin, ymin, xmax, ymax, x, y, color, background-color |
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return x, y |
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} |
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# draw a stream in the rectangle from (xmin, ymin) to (xmax, ymax), starting from (x, y), wrapping as necessary |
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# return the next (x, y) coordinate in raster order where drawing stopped |
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# that way the caller can draw more if given the same min and max bounding-box. |
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# if there isn't enough space, truncate |
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fn draw-stream-wrapping-right-then-down screen: (addr screen), stream: (addr stream byte), xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var xcurr/ecx: int <- copy x |
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var ycurr/edx: int <- copy y |
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var c/ebx: code-point <- copy 0 |
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var next-c/esi: code-point <- copy 0 |
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$draw-stream-wrapping-right-then-down:loop: { |
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# read c from either next-c or stream |
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$draw-stream-wrapping-right-then-down:read-base: { |
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compare next-c, 0 |
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{ |
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break-if-= |
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c <- copy next-c |
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next-c <- copy 0 |
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break $draw-stream-wrapping-right-then-down:read-base |
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} |
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var g/eax: code-point-utf8 <- read-code-point-utf8 stream |
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var _c/eax: code-point <- to-code-point g |
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c <- copy _c |
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} |
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compare c, 0xffffffff/end-of-file |
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break-if-= |
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compare c, 0xa/newline |
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{ |
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break-if-!= |
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# minimum effort to clear cursor |
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var dummy/eax: int <- draw-code-point screen, 0x20/space, xcurr, ycurr, color, background-color |
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xcurr <- copy xmin |
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ycurr <- increment |
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loop $draw-stream-wrapping-right-then-down:loop |
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} |
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var offset/eax: int <- draw-code-point screen, c, xcurr, ycurr, color, background-color |
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# overlay a combining character if necessary |
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$draw-stream-wrapping-right-then-down:read-combiner: { |
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var done?/eax: boolean <- stream-empty? stream |
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compare done?, 0/false |
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break-if-!= |
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# read a character |
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var g/eax: code-point-utf8 <- read-code-point-utf8 stream |
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var c/eax: code-point <- to-code-point g |
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# if not a combining character, save for next iteration and loop |
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{ |
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var combining-code-point?/eax: boolean <- combining-code-point? c |
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compare combining-code-point?, 0/false |
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} |
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{ |
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break-if-!= |
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next-c <- copy c |
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break $draw-stream-wrapping-right-then-down:read-combiner |
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} |
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# otherwise overlay it without saving its width |
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# This means strange results if a base and its combiner have different |
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# widths. We'll always follow the base width. |
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var dummy/eax: int <- overlay-code-point screen, c, xcurr, ycurr, color, background-color |
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} |
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xcurr <- add offset |
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compare xcurr, xmax |
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{ |
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break-if-< |
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xcurr <- copy xmin |
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ycurr <- increment |
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} |
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loop |
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} |
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set-cursor-position screen, xcurr, ycurr |
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return xcurr, ycurr |
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} |
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fn draw-stream-wrapping-right-then-down-from-cursor screen: (addr screen), stream: (addr stream byte), xmin: int, ymin: int, xmax: int, ymax: int, color: int, background-color: int { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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var end-x/edx: int <- copy cursor-x |
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end-x <- increment |
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compare end-x, xmax |
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{ |
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break-if-< |
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cursor-x <- copy xmin |
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cursor-y <- increment |
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} |
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cursor-x, cursor-y <- draw-stream-wrapping-right-then-down screen, stream, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color, background-color |
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} |
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fn draw-stream-wrapping-right-then-down-from-cursor-over-full-screen screen: (addr screen), stream: (addr stream byte), color: int, background-color: int { |
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var width/eax: int <- copy 0 |
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var height/ecx: int <- copy 0 |
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width, height <- screen-size screen |
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draw-stream-wrapping-right-then-down-from-cursor screen, stream, 0/xmin, 0/ymin, width, height, color, background-color |
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} |
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fn move-cursor-rightward-and-downward screen: (addr screen), xmin: int, xmax: int { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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cursor-x <- increment |
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compare cursor-x, xmax |
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{ |
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break-if-< |
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cursor-x <- copy xmin |
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cursor-y <- increment |
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} |
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set-cursor-position screen, cursor-x, cursor-y |
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} |
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fn draw-text-wrapping-right-then-down-over-full-screen screen: (addr screen), text: (addr array byte), x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var x2/eax: int <- copy 0 |
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var y2/ecx: int <- copy 0 |
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x2, y2 <- screen-size screen # width, height |
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x2, y2 <- draw-text-wrapping-right-then-down screen, text, 0/xmin, 0/ymin, x2, y2, x, y, color, background-color |
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return x2, y2 # cursor-x, cursor-y |
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} |
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fn draw-text-wrapping-right-then-down-from-cursor screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, color: int, background-color: int { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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var end-x/edx: int <- copy cursor-x |
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end-x <- increment |
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compare end-x, xmax |
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{ |
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break-if-< |
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cursor-x <- copy xmin |
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cursor-y <- increment |
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} |
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cursor-x, cursor-y <- draw-text-wrapping-right-then-down screen, text, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color, background-color |
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} |
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fn draw-text-wrapping-right-then-down-from-cursor-over-full-screen screen: (addr screen), text: (addr array byte), color: int, background-color: int { |
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var width/eax: int <- copy 0 |
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var height/ecx: int <- copy 0 |
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width, height <- screen-size screen |
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draw-text-wrapping-right-then-down-from-cursor screen, text, 0/xmin, 0/ymin, width, height, color, background-color |
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} |
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fn draw-int32-hex-wrapping-right-then-down screen: (addr screen), n: int, xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var stream-storage: (stream byte 0x100) |
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var stream/esi: (addr stream byte) <- address stream-storage |
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write-int32-hex stream, n |
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var xcurr/edx: int <- copy x |
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var ycurr/ecx: int <- copy y |
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{ |
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var g/eax: code-point-utf8 <- read-code-point-utf8 stream |
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compare g, 0xffffffff/end-of-file |
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break-if-= |
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var c/eax: code-point <- to-code-point g |
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var offset/eax: int <- draw-code-point screen, c, xcurr, ycurr, color, background-color |
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xcurr <- add offset |
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compare xcurr, xmax |
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{ |
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break-if-< |
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xcurr <- copy xmin |
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ycurr <- increment |
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} |
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loop |
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} |
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set-cursor-position screen, xcurr, ycurr |
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return xcurr, ycurr |
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} |
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fn draw-int32-hex-wrapping-right-then-down-over-full-screen screen: (addr screen), n: int, x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var x2/eax: int <- copy 0 |
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var y2/ecx: int <- copy 0 |
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x2, y2 <- screen-size screen # width, height |
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x2, y2 <- draw-int32-hex-wrapping-right-then-down screen, n, 0/xmin, 0/ymin, x2, y2, x, y, color, background-color |
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return x2, y2 # cursor-x, cursor-y |
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} |
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fn draw-int32-hex-wrapping-right-then-down-from-cursor screen: (addr screen), n: int, xmin: int, ymin: int, xmax: int, ymax: int, color: int, background-color: int { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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var end-x/edx: int <- copy cursor-x |
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end-x <- increment |
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compare end-x, xmax |
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{ |
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break-if-< |
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cursor-x <- copy xmin |
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cursor-y <- increment |
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} |
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cursor-x, cursor-y <- draw-int32-hex-wrapping-right-then-down screen, n, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color, background-color |
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} |
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fn draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen screen: (addr screen), n: int, color: int, background-color: int { |
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var width/eax: int <- copy 0 |
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var height/ecx: int <- copy 0 |
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width, height <- screen-size screen |
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draw-int32-hex-wrapping-right-then-down-from-cursor screen, n, 0/xmin, 0/ymin, width, height, color, background-color |
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} |
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fn draw-int32-decimal-wrapping-right-then-down screen: (addr screen), n: int, xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var stream-storage: (stream byte 0x100) |
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var stream/esi: (addr stream byte) <- address stream-storage |
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write-int32-decimal stream, n |
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var xcurr/edx: int <- copy x |
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var ycurr/ecx: int <- copy y |
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{ |
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var g/eax: code-point-utf8 <- read-code-point-utf8 stream |
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compare g, 0xffffffff/end-of-file |
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break-if-= |
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var c/eax: code-point <- to-code-point g |
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var offset/eax: int <- draw-code-point screen, c, xcurr, ycurr, color, background-color |
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xcurr <- add offset |
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compare xcurr, xmax |
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{ |
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break-if-< |
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xcurr <- copy xmin |
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ycurr <- increment |
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} |
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loop |
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} |
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set-cursor-position screen, xcurr, ycurr |
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return xcurr, ycurr |
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} |
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|
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fn draw-int32-decimal-wrapping-right-then-down-over-full-screen screen: (addr screen), n: int, x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var x2/eax: int <- copy 0 |
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var y2/ecx: int <- copy 0 |
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x2, y2 <- screen-size screen # width, height |
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x2, y2 <- draw-int32-decimal-wrapping-right-then-down screen, n, 0/xmin, 0/ymin, x2, y2, x, y, color, background-color |
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return x2, y2 # cursor-x, cursor-y |
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} |
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|
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fn draw-int32-decimal-wrapping-right-then-down-from-cursor screen: (addr screen), n: int, xmin: int, ymin: int, xmax: int, ymax: int, color: int, background-color: int { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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var end-x/edx: int <- copy cursor-x |
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end-x <- increment |
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compare end-x, xmax |
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{ |
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break-if-< |
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cursor-x <- copy xmin |
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cursor-y <- increment |
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} |
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cursor-x, cursor-y <- draw-int32-decimal-wrapping-right-then-down screen, n, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color, background-color |
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} |
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fn draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen screen: (addr screen), n: int, color: int, background-color: int { |
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var width/eax: int <- copy 0 |
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var height/ecx: int <- copy 0 |
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width, height <- screen-size screen |
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draw-int32-decimal-wrapping-right-then-down-from-cursor screen, n, 0/xmin, 0/ymin, width, height, color, background-color |
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} |
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## Text direction: down then right |
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# draw a single line of text vertically from x, y to ymax |
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# return the next 'y' coordinate |
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# if there isn't enough space, truncate |
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fn draw-text-downward screen: (addr screen), text: (addr array byte), x: int, y: int, ymax: int, color: int, background-color: int -> _/eax: int { |
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var stream-storage: (stream byte 0x100) |
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var stream/esi: (addr stream byte) <- address stream-storage |
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write stream, text |
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var ycurr/eax: int <- draw-stream-downward screen, stream, x, y, ymax, color, background-color |
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return ycurr |
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} |
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|
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# draw a single-line stream vertically from x, y to ymax |
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# return the next 'y' coordinate |
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# if there isn't enough space, truncate |
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# TODO: should we track horizontal width? |
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fn draw-stream-downward screen: (addr screen), stream: (addr stream byte), x: int, y: int, ymax: int, color: int, background-color: int -> _/eax: int { |
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var ycurr/ecx: int <- copy y |
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{ |
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var g/eax: code-point-utf8 <- read-code-point-utf8 stream |
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compare g, 0xffffffff/end-of-file |
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break-if-= |
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var c/eax: code-point <- to-code-point g |
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var dummy/eax: int <- draw-code-point screen, c, x, ycurr, color, background-color |
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ycurr <- increment |
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loop |
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} |
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set-cursor-position screen, x, ycurr |
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return ycurr |
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} |
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fn draw-text-downward-from-cursor screen: (addr screen), text: (addr array byte), ymax: int, color: int, background-color: int { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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var result/eax: int <- draw-text-downward screen, text, cursor-x, cursor-y, ymax, color, background-color |
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} |
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# draw text down and right in the rectangle from (xmin, ymin) to (xmax, ymax), starting from (x, y), wrapping as necessary |
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# return the next (x, y) coordinate in raster order where drawing stopped |
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# that way the caller can draw more if given the same min and max bounding-box. |
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# if there isn't enough space, truncate |
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fn draw-text-wrapping-down-then-right screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, _x: int, _y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var stream-storage: (stream byte 0x100) |
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var stream/esi: (addr stream byte) <- address stream-storage |
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write stream, text |
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var x/eax: int <- copy _x |
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var y/ecx: int <- copy _y |
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x, y <- draw-stream-wrapping-down-then-right screen, stream, xmin, ymin, xmax, ymax, x, y, color, background-color |
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return x, y |
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} |
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# draw a stream down and right in the rectangle from (xmin, ymin) to (xmax, ymax), starting from (x, y), wrapping as necessary |
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# return the next (x, y) coordinate in raster order where drawing stopped |
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# that way the caller can draw more if given the same min and max bounding-box. |
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# if there isn't enough space, truncate |
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# TODO: should we track horizontal width? just always offset by 2 for now |
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fn draw-stream-wrapping-down-then-right screen: (addr screen), stream: (addr stream byte), xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var xcurr/edx: int <- copy x |
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var ycurr/ecx: int <- copy y |
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{ |
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var g/eax: code-point-utf8 <- read-code-point-utf8 stream |
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compare g, 0xffffffff/end-of-file |
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break-if-= |
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var c/eax: code-point <- to-code-point g |
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var offset/eax: int <- draw-code-point screen, c, xcurr, ycurr, color, background-color |
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ycurr <- increment |
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compare ycurr, ymax |
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{ |
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break-if-< |
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xcurr <- add 2 |
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ycurr <- copy ymin |
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} |
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loop |
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} |
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set-cursor-position screen, xcurr, ycurr |
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return xcurr, ycurr |
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} |
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fn draw-text-wrapping-down-then-right-over-full-screen screen: (addr screen), text: (addr array byte), x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int { |
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var x2/eax: int <- copy 0 |
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var y2/ecx: int <- copy 0 |
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x2, y2 <- screen-size screen # width, height |
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x2, y2 <- draw-text-wrapping-down-then-right screen, text, 0/xmin, 0/ymin, x2, y2, x, y, color, background-color |
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return x2, y2 # cursor-x, cursor-y |
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} |
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fn draw-text-wrapping-down-then-right-from-cursor screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, color: int, background-color: int { |
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var cursor-x/eax: int <- copy 0 |
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var cursor-y/ecx: int <- copy 0 |
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cursor-x, cursor-y <- cursor-position screen |
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var end-y/edx: int <- copy cursor-y |
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end-y <- increment |
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compare end-y, ymax |
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{ |
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break-if-< |
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cursor-x <- increment |
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cursor-y <- copy ymin |
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} |
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cursor-x, cursor-y <- draw-text-wrapping-down-then-right screen, text, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color, background-color |
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} |
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fn draw-text-wrapping-down-then-right-from-cursor-over-full-screen screen: (addr screen), text: (addr array byte), color: int, background-color: int { |
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var width/eax: int <- copy 0 |
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var height/ecx: int <- copy 0 |
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width, height <- screen-size screen |
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draw-text-wrapping-down-then-right-from-cursor screen, text, 0/xmin, 0/ymin, width, height, color, background-color |
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}
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