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mu
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give up on .pgm files with color depths != 255 

Things kinda seem to work for color depths close to 255, but it isn't
really the goal here, and I don't have the skills of numerical analysis
to track this down.
This commit is contained in:
Kartik K. Agaram 2021-07-13 13:32:54 -07:00
parent 96bf3700fd
commit bee126654f
1 changed files with 5 additions and 9 deletions
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14
img.mu
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@ -17,7 +17,6 @@ type image {
# 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)
@ -252,13 +251,12 @@ fn initialize-image-from-pgm _self: (addr image), in: (addr stream byte) {
{
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"
break-if-=
set-cursor-position 0/screen, 0/x 2/y
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "levels of grey is not 255; continuing and hoping for the best", 0x2b/fg 0/bg
}
var dest/edi: (addr int) <- get self, max
copy-to *dest, tmp
# save width, height
dest <- get self, width
var dest/edi: (addr int) <- get self, width
copy-to *dest, width
dest <- get self, height
copy-to *dest, height
@ -796,10 +794,8 @@ fn initialize-image-from-ppm _self: (addr image), in: (addr stream byte) {
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
var dest/edi: (addr int) <- get self, width
copy-to *dest, width
dest <- get self, height
copy-to *dest, height