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add -d:useStb

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This commit is contained in:
Ryan Oldenburg 2021-01-21 19:07:07 -06:00
parent d337e04732
commit 773036a3ba
2 changed files with 18 additions and 11 deletions
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20
src/pixie/fileformats/jpg.nim
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@ -1,17 +1,23 @@
import pixie/images, pixie/common, pixie/fileformats/stb_image/stb_image
import pixie/images, pixie/common
when defined(useStb):
import pixie/fileformats/stb_image/stb_image
const
jpgStartOfImage* = [0xFF.uint8, 0xD8]
proc decodeJpg*(data: seq[uint8]): Image =
## Decodes the JPEG into an Image.
var
width: int
height: int
let pixels = loadFromMemory(data, width, height)
when not defined(useStb):
raise newException(PixieError, "Decoding JPG requires -d:useStb")
else:
var
width: int
height: int
let pixels = loadFromMemory(data, width, height)
result = newImage(width, height)
copyMem(result.data[0].addr, pixels[0].unsafeAddr, pixels.len)
result = newImage(width, height)
copyMem(result.data[0].addr, pixels[0].unsafeAddr, pixels.len)
proc decodeJpg*(data: string): Image {.inline.} =
decodeJpg(cast[seq[uint8]](data))

9
tests/test_jpg.nim
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@ -1,5 +1,6 @@
import pixie/fileformats/jpg
when defined(useStb):
import pixie/fileformats/jpg
let
original = readFile("tests/images/jpg/jpeg420exif.jpg")
stbDecoded = decodeJpg(original)
let
original = readFile("tests/images/jpg/jpeg420exif.jpg")
stbDecoded = decodeJpg(original)