IFF: set every pixel of each line

Browse Source

Images are allocated without being initialized, so a reader must write
every pixel of every line. The IFF reader did not always:

- Maya: nothing checked that the tiles cover the image: areas no tile
  covers are now opaque black.
- readStandardImage(), readCDIImage(), readRGFXImage() and
  readDEEPImage() copied min(bytesPerLine, decoded line) bytes, and some
  decoded lines are shorter than the image line:
  - a PBM with 8 bitplanes and a 64 color CMAP was taken for HAM and
    allocated as RGB888, while PBM data are one index per pixel: HAM is
    no longer applied to PBM images;
  - other mismatches (e.g. HAM without CMAP, RGB8 with 32 bitplanes, CD-i
    CLUT3 or RGB888, a truncated CD-i line) are now an error: a decoded
    line that does not cover the image line is refused.

Added the read test pbm_64colors.iff, which fails without this change.

...

This commit is contained in:

Ana Bobillo

2026-10-29 08:27:06 +01:00

committed by Mirco Miranda

parent d6e97b1bd1

commit 296444189e

4 changed files with 26 additions and 14 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download Patch File Download Diff File Expand all files Collapse all files

autotests/read/iff/pbm_64colors.iff

BIN

Binary file not shown.

autotests/read/iff/pbm_64colors.png

BIN

Binary file not shown.

Side by Side After Width:  |  Height:  |  Size: 341 B