7502 - baremetal text: better interface
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@ -35,10 +35,11 @@ fn draw-text-rightward screen: (addr screen), text: (addr array byte), x: int, x
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return xcurr
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}
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# draw text from (x, y) to (xmax, ymax), wrapping as necessary
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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, return 0 without modifying the screen
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fn draw-text-rightward-wrapped screen: (addr screen), text: (addr array byte), x: int, y: int, xmax: int, ymax: int, color: int -> _/eax: int, _/ecx: int {
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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 -> _/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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@ -55,7 +56,7 @@ fn draw-text-rightward-wrapped screen: (addr screen), text: (addr array byte), x
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compare xcurr, xmax
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{
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break-if-<
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xcurr <- copy x
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xcurr <- copy xmin
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ycurr <- add 0x10 # font-height
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}
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loop
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@ -78,7 +79,7 @@ fn draw-text-rightward-wrapped screen: (addr screen), text: (addr array byte), x
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compare xcurr, xmax
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{
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break-if-<
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xcurr <- copy x
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xcurr <- copy xmin
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ycurr <- add 0x10 # font-height
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}
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loop
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@ -1,4 +1,4 @@
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# Draw ASCII text within a bounding box, while wrapping.
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# Drawing ASCII text incrementally within a bounding box.
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#
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# To build a disk image:
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# ./translate_mu_baremetal baremetal/ex6.mu # emits disk.img
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@ -10,8 +10,11 @@
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# Expected output: a box and text that doesn't overflow it
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fn main {
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draw-box 0, 0xf, 0xf, 0x61, 0x41, 0x4
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var x/eax: int <- copy 0
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var y/ecx: int <- copy 0
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x, y <- draw-text-rightward-wrapped 0, "hello from baremetal Mu!", 0x10, 0x10, 0x60, 0x40, 0xa # xmax = 0x60, ymax = 0x40
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draw-box 0, 0xf, 0x1f, 0x79, 0x51, 0x4
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var x/eax: int <- copy 0x20
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var y/ecx: int <- copy 0x20
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x, y <- draw-text-wrapping-right-then-down 0, "hello ", 0x10, 0x20, 0x78, 0x50, x, y, 0xa # (0x10, 0x20) -> (0x78, 0x50)
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x, y <- draw-text-wrapping-right-then-down 0, "from ", 0x10, 0x20, 0x78, 0x50, x, y, 0xa
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x, y <- draw-text-wrapping-right-then-down 0, "baremetal ", 0x10, 0x20, 0x78, 0x50, x, y, 0xa
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x, y <- draw-text-wrapping-right-then-down 0, "Mu!", 0x10, 0x20, 0x78, 0x50, x, y, 0xa
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}
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