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tiffdec: add grayscale support

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the file is always decoded to RGBA, so just the samples_per_px needed an
update

Bug: webp:563
Change-Id: I95d95c3b9e45dc8ecb2223f89f4ba791f0b21e8b
This commit is contained in:
James Zern 2022-03-31 21:38:00 -07:00
parent e685feef0c
commit 0957fd69ee
1 changed files with 3 additions and 1 deletions
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4
imageio/tiffdec.c
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@ -188,7 +188,9 @@ int ReadTIFF(const uint8_t* const data, size_t data_size,
fprintf(stderr, "Error! Cannot retrieve TIFF samples-per-pixel info.\n");
goto End;
}
if (samples_per_px < 3 || samples_per_px > 4) goto End; // not supported
if (!(samples_per_px == 1 || samples_per_px == 3 || samples_per_px == 4)) {
goto End; // not supported
}
if (!(TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &image_width) &&
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &image_height))) {