fixed "(y, x) in widget" - ranger - mirror of ranger

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author	hut <hut@lavabit.com>	2009-12-28 23:52:39 +0100
committer	hut <hut@lavabit.com>	2009-12-28 23:52:39 +0100
commit	3e092587bbcd5d8123a323884cb03b54747005e4 (patch)
tree	909b220a94b306d2d4be8d7ddc15690662d13d0b /test/tc_keyapi.py
parent	975028d45f2356f6947144a0da1ce280c381c836 (diff)
download	ranger-3e092587bbcd5d8123a323884cb03b54747005e4.tar.gz

fixed "(y, x) in widget"

Diffstat (limited to 'test/tc_keyapi.py')

0 files changed, 0 insertions, 0 deletions

# load an image from disk and display it on screen # # To build: # $ ./translate shell/*.mu # generates code.img # Load a pbm, pgm or ppm image (no more than 255 levels) # $ dd if=/dev/zero of=data.img count=20160 # $ cat x.pbm |dd of=data.img conv=notrunc # or # $ cat t.pgm |dd of=data.img conv=notrunc # or # $ cat snail.ppm |dd of=data.img conv=notrunc # To run: # $ qemu-system-i386 -hda code.img -hdb data.img type image { type: int # supported types: # 1: portable bitmap (P1) - pixels 0 or 1 # 2: portable greymap (P2) - pixels 1-byte greyscale values # 3: portable pixmap (P3) - pixels 3-byte rgb values max: int width: int height: int data: (handle array byte) } fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk) { var img-storage: image var img/esi: (addr image) <- address img-storage load-image img, data-disk #? render-image screen, img, 0/x, 0/y, 0x300/width, 0x300/height set-cursor-position screen, 0 0 render-image screen, img, 0/x, 0/y, 0x258/width=600, 0x190/height=400 #? draw-rect screen, 0x5c 0x60, 0x6c 0x6c, 9/blue #? render-image screen, img, 0x20/x, 0x80/y, 0x12c/width=300, 0xc8/height=200 render-pgm-image screen, img, 0x220/x, 0x80/y, 0x12c/width=300, 0xc8/height=200 } fn load-image self: (addr image), data-disk: (addr disk) { # data-disk -> stream var s-storage: (stream byte 0x200000) # 512* 0x1000 sectors var s/ebx: (addr stream byte) <- address s-storage draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "loading sectors from data disk", 3/fg, 0/bg move-cursor-to-left-margin-of-next-line 0/screen load-sectors data-disk, 0/lba, 0x100/sectors, s load-sectors data-disk, 0x100/lba, 0x100/sectors, s load-sectors data-disk, 0x200/lba, 0x100/sectors, s load-sectors data-disk, 0x300/lba, 0x100/sectors, s load-sectors data-disk, 0x400/lba, 0x100/sectors, s load-sectors data-disk, 0x500/lba, 0x100/sectors, s load-sectors data-disk, 0x600/lba, 0x100/sectors, s load-sectors data-disk, 0x700/lba, 0x100/sectors, s load-sectors data-disk, 0x800/lba, 0x100/sectors, s load-sectors data-disk, 0x900/lba, 0x100/sectors, s load-sectors data-disk, 0xa00/lba, 0x100/sectors, s load-sectors data-disk, 0xb00/lba, 0x100/sectors, s load-sectors data-disk, 0xc00/lba, 0x100/sectors, s load-sectors data-disk, 0xd00/lba, 0x100/sectors, s load-sectors data-disk, 0xe00/lba, 0x100/sectors, s load-sectors data-disk, 0xf00/lba, 0x100/sectors, s draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "parsing", 3/fg, 0/bg move-cursor-to-left-margin-of-next-line 0/screen initialize-image self, s } fn initialize-image _self: (addr image), in: (addr stream byte) { var self/esi: (addr image) <- copy _self var mode-storage: slice var mode/ecx: (addr slice) <- address mode-storage next-word in, mode { var P1?/eax: boolean <- slice-equal? mode, "P1" compare P1?, 0/false break-if-= var type-a/eax: (addr int) <- get self, type copy-to *type-a, 1/ppm initialize-image-from-pbm self, in return } { var P2?/eax: boolean <- slice-equal? mode, "P2" compare P2?, 0/false break-if-= var type-a/eax: (addr int) <- get self, type copy-to *type-a, 2/pgm initialize-image-from-pgm self, in return } { var P3?/eax: boolean <- slice-equal? mode, "P3" compare P3?, 0/false break-if-= var type-a/eax: (addr int) <- get self, type copy-to *type-a, 3/ppm initialize-image-from-ppm self, in return } abort "initialize-image: unrecognized image type" } # dispatch to a few variants with mostly identical boilerplate fn render-image screen: (addr screen), _img: (addr image), xmin: int, ymin: int, width: int, height: int { var img/esi: (addr image) <- copy _img var type-a/eax: (addr int) <- get img, type { compare *type-a, 1/pbm break-if-!= render-pbm-image screen, img, xmin, ymin, width, height return } { compare *type-a, 2/pgm break-if-!= var img2-storage: image var img2/edi: (addr image) <- address img2-storage dither-pgm-unordered img, img2 #? render-raw-image screen, img2, xmin, ymin, width, height return } { compare *type-a, 3/ppm break-if-!= render-ppm-image screen, img, xmin, ymin, width, height return } abort "render-image: unrecognized image type" } ## helpers # import a black-and-white ascii bitmap (each pixel is 0 or 1) fn initialize-image-from-pbm _self: (addr image), in: (addr stream byte) { var self/esi: (addr image) <- copy _self var curr-word-storage: slice var curr-word/ecx: (addr slice) <- address curr-word-storage # load width, height next-word in, curr-word var tmp/eax: int <- parse-decimal-int-from-slice curr-word var width/edx: int <- copy tmp next-word in, curr-word tmp <- parse-decimal-int-from-slice curr-word var height/ebx: int <- copy tmp # save width, height var dest/eax: (addr int) <- get self, width copy-to *dest, width dest <- get self, height copy-to *dest, height # initialize data var capacity/edx: int <- copy width capacity <- multiply height var data-ah/edi: (addr handle array byte) <- get self, data populate data-ah, capacity var _data/eax: (addr array byte) <- lookup *data-ah var data/edi: (addr array byte) <- copy _data var i/ebx: int <- copy 0 { compare i, capacity break-if->= next-word in, curr-word var src/eax: int <- parse-decimal-int-from-slice curr-word { var dest/ecx: (addr byte) <- index data, i copy-byte-to *dest, src } i <- increment loop } } # render a black-and-white ascii bitmap (each pixel is 0 or 1) fn render-pbm-image screen: (addr screen), _img: (addr image), xmin: int, ymin: int, width: int, height: int { var img/esi: (addr image) <- copy _img # yratio = height/img->height var img-height-a/eax: (addr int) <- get img, height var img-height/xmm0: float <- convert *img-height-a var yratio/xmm1: float <- convert height yratio <- divide img-height # xratio = width/img->width var img-width-a/eax: (addr int) <- get img, width var img-width/ebx: int <- copy *img-width-a var img-width-f/xmm0: float <- convert img-width var xratio/xmm2: float <- convert width xratio <- divide img-width-f # esi = img->data var img-data-ah/eax: (addr handle array byte) <- get img, data var _img-data/eax: (addr array byte) <- lookup *img-data-ah var img-data/esi: (addr array byte) <- copy _img-data var len/edi: int <- length img-data # var one/eax: int <- copy 1 var one-f/xmm3: float <- convert one var width-f/xmm4: float <- convert width var height-f/xmm5: float <- convert height var zero/eax: int <- copy 0 var zero-f/xmm0: float <- convert zero var y/xmm6: float <- copy zero-f { compare y, height-f break-if-float>= var imgy-f/xmm5: float <- copy y imgy-f <- divide yratio var imgy/edx: int <- truncate imgy-f var x/xmm7: float <- copy zero-f { compare x, width-f break-if-float>= var imgx-f/xmm5: float <- copy x imgx-f <- divide xratio var imgx/ecx: int <- truncate imgx-f var idx/eax: int <- copy imgy idx <- multiply img-width idx <- add imgx # error info in case we rounded wrong and 'index' will fail bounds-check compare idx, len { break-if-< set-cursor-position 0/screen, 0x20/x 0x20/y draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, imgx, 3/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, imgy, 4/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, idx, 5/fg 0/bg } var src-a/eax: (addr byte) <- index img-data, idx var src/eax: byte <- copy-byte *src-a var color-int/eax: int <- copy src { compare color-int, 0/black break-if-= color-int <- copy 0xf/white } var screenx/ecx: int <- convert x screenx <- add xmin var screeny/edx: int <- convert y screeny <- add ymin pixel screen, screenx, screeny, color-int x <- add one-f loop } y <- add one-f loop } } # import a greyscale ascii "greymap" (each pixel is a shade of grey from 0 to 255) fn initialize-image-from-pgm _self: (addr image), in: (addr stream byte) { var self/esi: (addr image) <- copy _self var curr-word-storage: slice var curr-word/ecx: (addr slice) <- address curr-word-storage # load width, height next-word in, curr-word var tmp/eax: int <- parse-decimal-int-from-slice curr-word var width/edx: int <- copy tmp next-word in, curr-word tmp <- parse-decimal-int-from-slice curr-word var height/ebx: int <- copy tmp # check and save color levels next-word in, curr-word { tmp <- parse-decimal-int-from-slice curr-word compare tmp, 0xff break-if-<= abort "initialize-image-from-pgm: no more than 255 levels of grey" } var dest/edi: (addr int) <- get self, max copy-to *dest, tmp # save width, height dest <- get self, width copy-to *dest, width dest <- get self, height copy-to *dest, height # initialize data var capacity/edx: int <- copy width capacity <- multiply height var data-ah/edi: (addr handle array byte) <- get self, data populate data-ah, capacity var _data/eax: (addr array byte) <- lookup *data-ah var data/edi: (addr array byte) <- copy _data var i/ebx: int <- copy 0 { compare i, capacity break-if->= next-word in, curr-word var src/eax: int <- parse-decimal-int-from-slice curr-word { var dest/ecx: (addr byte) <- index data, i copy-byte-to *dest, src } i <- increment loop } } # render a greyscale ascii "greymap" (each pixel is a shade of grey from 0 to 255) by quantizing the shades fn render-pgm-image screen: (addr screen), _img: (addr image), xmin: int, ymin: int, width: int, height: int { var img/esi: (addr image) <- copy _img # yratio = height/img->height var img-height-a/eax: (addr int) <- get img, height var img-height/xmm0: float <- convert *img-height-a var yratio/xmm1: float <- convert height yratio <- divide img-height # xratio = width/img->width var img-width-a/eax: (addr int) <- get img, width var img-width/ebx: int <- copy *img-width-a var img-width-f/xmm0: float <- convert img-width var xratio/xmm2: float <- convert width xratio <- divide img-width-f # esi = img->data var img-data-ah/eax: (addr handle array byte) <- get img, data var _img-data/eax: (addr array byte) <- lookup *img-data-ah var img-data/esi: (addr array byte) <- copy _img-data var len/edi: int <- length img-data # var one/eax: int <- copy 1 var one-f/xmm3: float <- convert one var width-f/xmm4: float <- convert width var height-f/xmm5: float <- convert height var zero/eax: int <- copy 0 var zero-f/xmm0: float <- convert zero var y/xmm6: float <- copy zero-f { compare y, height-f break-if-float>= var imgy-f/xmm5: float <- copy y imgy-f <- divide yratio var imgy/edx: int <- truncate imgy-f var x/xmm7: float <- copy zero-f { compare x, width-f break-if-float>= var imgx-f/xmm5: float <- copy x imgx-f <- divide xratio var imgx/ecx: int <- truncate imgx-f var idx/eax: int <- copy imgy idx <- multiply img-width idx <- add imgx # error info in case we rounded wrong and 'index' will fail bounds-check compare idx, len { break-if-< set-cursor-position 0/screen, 0x20/x 0x20/y draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, imgx, 3/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, imgy, 4/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, idx, 5/fg 0/bg } var src-a/eax: (addr byte) <- index img-data, idx var src/eax: byte <- copy-byte *src-a var color-int/eax: int <- nearest-grey src var screenx/ecx: int <- convert x screenx <- add xmin var screeny/edx: int <- convert y screeny <- add ymin pixel screen, screenx, screeny, color-int x <- add one-f loop } y <- add one-f loop } } fn nearest-grey level-255: byte -> _/eax: int { var result/eax: int <- copy level-255 result <- shift-right 4 result <- add 0x10 return result } fn dither-pgm-unordered-monochrome _src: (addr image), _dest: (addr image) { var src/esi: (addr image) <- copy _src var dest/edi: (addr image) <- copy _dest # copy 'width' var src-width-a/eax: (addr int) <- get src, width var tmp/eax: int <- copy *src-width-a var src-width: int copy-to src-width, tmp { var dest-width-a/edx: (addr int) <- get dest, width copy-to *dest-width-a, tmp } # copy 'height' var src-height-a/eax: (addr int) <- get src, height var tmp/eax: int <- copy *src-height-a var src-height: int copy-to src-height, tmp { var dest-height-a/ecx: (addr int) <- get dest, height copy-to *dest-height-a, tmp } # transform 'data' var capacity/ebx: int <- copy src-width capacity <- multiply src-height var dest/edi: (addr image) <- copy _dest var dest-data-ah/eax: (addr handle array byte) <- get dest, data populate dest-data-ah, capacity var _dest-data/eax: (addr array byte) <- lookup *dest-data-ah var dest-data/edi: (addr array byte) <- copy _dest-data # needs a buffer to temporarily hold more than 256 levels of precision var errors-storage: (array int 0xc0000) var errors/ebx: (addr array int) <- address errors-storage var src-data-ah/eax: (addr handle array byte) <- get src, data var _src-data/eax: (addr array byte) <- lookup *src-data-ah var src-data/esi: (addr array byte) <- copy _src-data var y/edx: int <- copy 0 { compare y, src-height break-if->= #? psd "y", y, 9/fg, 0/x, y var x/ecx: int <- copy 0 { compare x, src-width break-if->= #? psd "x", x, 3/fg, x, y var curr/eax: byte <- _read-pgm-buffer src-data, x, y, src-width var curr-int/eax: int <- copy curr curr-int <- shift-left 0x10 # we have 32 bits; we'll use 16 bits for the fraction and leave 8 for unanticipated overflow var error/esi: int <- _read-dithering-error errors, x, y, src-width error <- add curr-int $_dither-pgm-unordered-monochrome:update-error: { #? psd "e", error, 5/fg, x, y compare error, 0x800000 { break-if->= #? psd "p", 0, 0x14/fg, x, y _write-raw-buffer dest-data, x, y, src-width, 0/black break $_dither-pgm-unordered-monochrome:update-error } #? psd "p", 1, 0xf/fg, x, y _write-raw-buffer dest-data, x, y, src-width, 1/white error <- subtract 0xff0000 } _diffuse-dithering-error-floyd-steinberg errors, x, y, src-width, src-height, error x <- increment loop } move-cursor-to-left-margin-of-next-line 0/screen y <- increment loop } } fn dither-pgm-unordered _src: (addr image), _dest: (addr image) { var src/esi: (addr image) <- copy _src var dest/edi: (addr image) <- copy _dest # copy 'width' var src-width-a/eax: (addr int) <- get src, width var tmp/eax: int <- copy *src-width-a var src-width: int copy-to src-width, tmp { var dest-width-a/edx: (addr int) <- get dest, width copy-to *dest-width-a, tmp } # copy 'height' var src-height-a/eax: (addr int) <- get src, height var tmp/eax: int <- copy *src-height-a var src-height: int copy-to src-height, tmp { var dest-height-a/ecx: (addr int) <- get dest, height copy-to *dest-height-a, tmp } # transform 'data' var capacity/ebx: int <- copy src-width capacity <- multiply src-height var dest/edi: (addr image) <- copy _dest var dest-data-ah/eax: (addr handle array byte) <- get dest, data populate dest-data-ah, capacity var _dest-data/eax: (addr array byte) <- lookup *dest-data-ah var dest-data/edi: (addr array byte) <- copy _dest-data # needs a buffer to temporarily hold more than 256 levels of precision var errors-storage: (array int 0xc0000) var errors/ebx: (addr array int) <- address errors-storage var src-data-ah/eax: (addr handle array byte) <- get src, data var _src-data/eax: (addr array byte) <- lookup *src-data-ah var src-data/esi: (addr array byte) <- copy _src-data var y/edx: int <- copy 0 { compare y, src-height break-if->= set-cursor-position 0/screen, 0 0 draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "y ", 3/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, y, 3/fg 0/bg var x/ecx: int <- copy 0 { compare x, src-width break-if->= #? psd "x", x, 3/fg, x, y var initial-color/eax: byte <- _read-pgm-buffer src-data, x, y, src-width #? { #? var foo/eax: int <- copy initial-color #? psd "r", foo, 7/fg, x, y #? } var error/esi: int <- _read-dithering-error errors, x, y, src-width { var foo/eax: int <- copy error foo <- shift-right-signed 0x10 compare foo, 0xff break-if-< pixel 0/screen x, y, 4/red #? set-cursor-position 0/screen, 0x20 0x20 #? draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, x, 3/fg 0/bg #? draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, y, 4/fg 0/bg #? abort "error too high" #? psd "e", foo, 5/fg, x, y } # error += (initial-color << 16) { var tmp/eax: int <- copy initial-color tmp <- shift-left 0x10 # we have 32 bits; we'll use 16 bits for the fraction and leave 8 for unanticipated overflow error <- add tmp } # nearest-color = nearest(error >> 16) var nearest-color/eax: int <- copy error nearest-color <- shift-right-signed 0x10 { compare nearest-color, 0 break-if->= nearest-color <- copy 0 } # . round to nearest multiple of 0x10 { var tmp/ecx: int <- copy nearest-color tmp <- and 0xf compare tmp, 8 break-if-< nearest-color <- add 8 } nearest-color <- and 0xf0 # error -= (nearest-color << 16) { var tmp/eax: int <- copy nearest-color tmp <- shift-left 0x10 error <- subtract tmp } # color-index = (nearest-color >> 4 + 16) var color-index/eax: int <- copy nearest-color color-index <- shift-right 4 color-index <- add 0x10 #? psd "p", color-index, 4/fg, x, y var color-index-byte/eax: byte <- copy-byte color-index _write-raw-buffer dest-data, x, y, src-width, color-index-byte _diffuse-dithering-error-floyd-steinberg errors, x, y, src-width, src-height, error x <- increment loop } #? { #? compare y, 0x60 #? break-if-< move-cursor-to-left-margin-of-next-line 0/screen #? } #? { #? var key/eax: byte <- read-key 0/keyboard #? compare key, 0 #? loop-if-= #? } y <- increment loop } } # Use Floyd-Steinberg algorithm for diffusing error at x, y in a 2D grid of # dimensions (width, height) # # https://tannerhelland.com/2012/12/28/dithering-eleven-algorithms-source-code.html # # Error is currently a fixed-point number with 16-bit fraction. But # interestingly this function doesn't care about that. fn _diffuse-dithering-error-floyd-steinberg errors: (addr array int), x: int, y: int, width: int, height: int, error: int { { compare error, 0 break-if-!= return } var width-1/esi: int <- copy width width-1 <- decrement var height-1/edi: int <- copy height height-1 <- decrement # delta = error/16 #? show-errors errors, width, height, x, y var delta/ecx: int <- copy error delta <- shift-right-signed 4 # In Floyd-Steinberg, each pixel X transmits its errors to surrounding # pixels in the following proportion: # X 7/16 # 3/16 5/16 1/16 var x/edx: int <- copy x { compare x, width-1 break-if->= var tmp/eax: int <- copy 7 tmp <- multiply delta var xright/edx: int <- copy x xright <- increment _accumulate-dithering-error errors, xright, y, width, tmp } var y/ebx: int <- copy y { compare y, height-1 break-if-< return } var ybelow: int copy-to ybelow, y increment ybelow { compare x, 0 break-if-<= var tmp/eax: int <- copy 3 tmp <- multiply delta var xleft/edx: int <- copy x xleft <- decrement _accumulate-dithering-error errors, xleft, ybelow, width, tmp } { var tmp/eax: int <- copy 5 tmp <- multiply delta _accumulate-dithering-error errors, x, ybelow, width, tmp } { compare x, width-1 break-if->= var xright/edx: int <- copy x xright <- increment _accumulate-dithering-error errors, xright, ybelow, width, delta } #? show-errors errors, width, height, x, y } fn _accumulate-dithering-error errors: (addr array int), x: int, y: int, width: int, error: int { var curr/esi: int <- _read-dithering-error errors, x, y, width curr <- add error _write-dithering-error errors, x, y, width, curr } fn _read-dithering-error _errors: (addr array int), x: int, y: int, width: int -> _/esi: int { var errors/esi: (addr array int) <- copy _errors var idx/ecx: int <- copy y idx <- multiply width idx <- add x #? psd "i", idx, 5/fg, x, y var result-a/eax: (addr int) <- index errors, idx return *result-a } fn _write-dithering-error _errors: (addr array int), x: int, y: int, width: int, val: int { var errors/esi: (addr array int) <- copy _errors var idx/ecx: int <- copy y idx <- multiply width idx <- add x #? draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, idx, 7/fg 0/bg #? move-cursor-to-left-margin-of-next-line 0/screen var src/eax: int <- copy val var dest-a/edi: (addr int) <- index errors, idx copy-to *dest-a, src } fn _read-pgm-buffer _buf: (addr array byte), x: int, y: int, width: int -> _/eax: byte { var buf/esi: (addr array byte) <- copy _buf var idx/ecx: int <- copy y idx <- multiply width idx <- add x var result-a/eax: (addr byte) <- index buf, idx var result/eax: byte <- copy-byte *result-a return result } fn _write-raw-buffer _buf: (addr array byte), x: int, y: int, width: int, val: byte { var buf/esi: (addr array byte) <- copy _buf var idx/ecx: int <- copy y idx <- multiply width idx <- add x var src/eax: byte <- copy val var dest-a/edi: (addr byte) <- index buf, idx copy-byte-to *dest-a, src } fn show-errors errors: (addr array int), width: int, height: int, x: int, y: int { compare y, 1 { break-if-= return } compare x, 0 { break-if-= return } var y/edx: int <- copy 0 { compare y, height break-if->= var x/ecx: int <- copy 0 { compare x, width break-if->= var error/esi: int <- _read-dithering-error errors, x, y, width psd "e", error, 5/fg, x, y x <- increment loop } move-cursor-to-left-margin-of-next-line 0/screen y <- increment loop } } fn psd s: (addr array byte), d: int, fg: int, x: int, y: int { #? { #? compare y, 0x60 #? break-if->= #? return #? } #? { #? compare y, 0x6c #? break-if-<= #? return #? } { compare x, 0x40 break-if->= return } #? { #? compare x, 0x6c #? break-if-<= #? return #? } draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, s, 7/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, d, fg 0/bg } fn psx s: (addr array byte), d: int, fg: int, x: int, y: int { #? { #? compare y, 0x60 #? break-if->= #? return #? } #? { #? compare y, 0x6c #? break-if-<= #? return #? } { compare x, 0x20 break-if->= return } #? { #? compare x, 0x6c #? break-if-<= #? return #? } draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, s, 7/fg 0/bg draw-int32-hex-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, d, fg 0/bg } # import a color ascii "pixmap" (each pixel consists of 3 shades of r/g/b from 0 to 255) fn initialize-image-from-ppm _self: (addr image), in: (addr stream byte) { var self/esi: (addr image) <- copy _self var curr-word-storage: slice var curr-word/ecx: (addr slice) <- address curr-word-storage # load width, height next-word in, curr-word var tmp/eax: int <- parse-decimal-int-from-slice curr-word var width/edx: int <- copy tmp next-word in, curr-word tmp <- parse-decimal-int-from-slice curr-word var height/ebx: int <- copy tmp next-word in, curr-word # check color levels { tmp <- parse-decimal-int-from-slice curr-word compare tmp, 0xff break-if-= abort "initialize-image-from-ppm: supports exactly 255 levels per rgb channel" } var dest/edi: (addr int) <- get self, max copy-to *dest, tmp # save width, height dest <- get self, width copy-to *dest, width dest <- get self, height copy-to *dest, height # initialize data var capacity/edx: int <- copy width capacity <- multiply height # . multiply by 3 for the r/g/b channels var tmp/eax: int <- copy capacity tmp <- shift-left 1 capacity <- add tmp # var data-ah/edi: (addr handle array byte) <- get self, data populate data-ah, capacity var _data/eax: (addr array byte) <- lookup *data-ah var data/edi: (addr array byte) <- copy _data var i/ebx: int <- copy 0 { compare i, capacity break-if->= next-word in, curr-word var src/eax: int <- parse-decimal-int-from-slice curr-word { var dest/ecx: (addr byte) <- index data, i copy-byte-to *dest, src } i <- increment loop } } # import a color ascii "pixmap" (each pixel consists of 3 shades of r/g/b from 0 to 255) fn render-ppm-image screen: (addr screen), _img: (addr image), xmin: int, ymin: int, width: int, height: int { var img/esi: (addr image) <- copy _img # yratio = height/img->height var img-height-a/eax: (addr int) <- get img, height var img-height/xmm0: float <- convert *img-height-a var yratio/xmm1: float <- convert height yratio <- divide img-height # xratio = width/img->width var img-width-a/eax: (addr int) <- get img, width var img-width/ebx: int <- copy *img-width-a var img-width-f/xmm0: float <- convert img-width var xratio/xmm2: float <- convert width xratio <- divide img-width-f # esi = img->data var img-data-ah/eax: (addr handle array byte) <- get img, data var _img-data/eax: (addr array byte) <- lookup *img-data-ah var img-data/esi: (addr array byte) <- copy _img-data var len/edi: int <- length img-data # var one/eax: int <- copy 1 var one-f/xmm3: float <- convert one var width-f/xmm4: float <- convert width var height-f/xmm5: float <- convert height var zero/eax: int <- copy 0 var zero-f/xmm0: float <- convert zero var y/xmm6: float <- copy zero-f { compare y, height-f break-if-float>= var imgy-f/xmm5: float <- copy y imgy-f <- divide yratio var imgy/edx: int <- truncate imgy-f var x/xmm7: float <- copy zero-f { compare x, width-f break-if-float>= var imgx-f/xmm5: float <- copy x imgx-f <- divide xratio var imgx/ecx: int <- truncate imgx-f var idx/eax: int <- copy imgy idx <- multiply img-width idx <- add imgx # . multiply by 3 for the r/g/b channels { var tmp/ecx: int <- copy idx tmp <- shift-left 1 idx <- add tmp } # error info in case we rounded wrong and 'index' will fail bounds-check compare idx, len { break-if-< set-cursor-position 0/screen, 0x20/x 0x20/y draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, imgx, 3/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, imgy, 4/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, idx, 5/fg 0/bg } # r channel var r: int { var src-a/eax: (addr byte) <- index img-data, idx var src/eax: byte <- copy-byte *src-a copy-to r, src } idx <- increment # g channel var g: int { var src-a/eax: (addr byte) <- index img-data, idx var src/eax: byte <- copy-byte *src-a copy-to g, src } idx <- increment # b channel var b: int { var src-a/eax: (addr byte) <- index img-data, idx var src/eax: byte <- copy-byte *src-a copy-to b, src } idx <- increment # plot nearest color var color/eax: int <- nearest-color-euclidean r, g, b var screenx/ecx: int <- convert x screenx <- add xmin var screeny/edx: int <- convert y screeny <- add ymin pixel screen, screenx, screeny, color x <- add one-f loop } y <- add one-f loop } } fn render-raw-image screen: (addr screen), _img: (addr image), xmin: int, ymin: int, width: int, height: int { var img/esi: (addr image) <- copy _img # yratio = height/img->height var img-height-a/eax: (addr int) <- get img, height var img-height/xmm0: float <- convert *img-height-a var yratio/xmm1: float <- convert height yratio <- divide img-height # xratio = width/img->width var img-width-a/eax: (addr int) <- get img, width var img-width/ebx: int <- copy *img-width-a var img-width-f/xmm0: float <- convert img-width var xratio/xmm2: float <- convert width xratio <- divide img-width-f # esi = img->data var img-data-ah/eax: (addr handle array byte) <- get img, data var _img-data/eax: (addr array byte) <- lookup *img-data-ah var img-data/esi: (addr array byte) <- copy _img-data var len/edi: int <- length img-data # var one/eax: int <- copy 1 var one-f/xmm3: float <- convert one var width-f/xmm4: float <- convert width var height-f/xmm5: float <- convert height var zero/eax: int <- copy 0 var zero-f/xmm0: float <- convert zero var y/xmm6: float <- copy zero-f { compare y, height-f break-if-float>= var imgy-f/xmm5: float <- copy y imgy-f <- divide yratio var imgy/edx: int <- truncate imgy-f var x/xmm7: float <- copy zero-f { compare x, width-f break-if-float>= var imgx-f/xmm5: float <- copy x imgx-f <- divide xratio var imgx/ecx: int <- truncate imgx-f var idx/eax: int <- copy imgy idx <- multiply img-width idx <- add imgx # error info in case we rounded wrong and 'index' will fail bounds-check compare idx, len { break-if-< set-cursor-position 0/screen, 0x20/x 0x20/y draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, imgx, 3/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, imgy, 4/fg 0/bg draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, idx, 5/fg 0/bg } var color-a/eax: (addr byte) <- index img-data, idx var color/eax: byte <- copy-byte *color-a var color-int/eax: int <- copy color var screenx/ecx: int <- convert x screenx <- add xmin var screeny/edx: int <- convert y screeny <- add ymin pixel screen, screenx, screeny, color-int x <- add one-f loop } y <- add one-f loop } }


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