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of the previous image bounds
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place (gcc ASAN detects it)
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Apparently, this has not been tested for a long time, and might be a
refactoring relict. Anyhow, we have to pass the context to
`GIFNextPixel` as well.
This issue has been reported by Kleber Tarcísio.
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Whenever `gdImageGifAnimAddPtr()` calls `gdImageGifAnimAddCtx()` and
the latter fails, we must not call `gdDPExtractData()`; otherwise a
double-free would occur. Since `gdImageGifAnimAddCtx` is a void
function, and we can't change that for BC reasons, we're introducing
a static helper which is used internally.
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Whenever `gdImage*Ptr()` calls `gdImage*Ctx()` and the latter fails, we
must not call `gdDPExtractData()`; otherwise a double-free would
happen. Since `gdImage*Ctx()` are void functions, and we can't change
that for BC reasons, we're introducing static helpers which are used
internally.
We're adding a regression test for `gdImageJpegPtr()`, but not for
`gdImageGifPtr()` and `gdImageWbmpPtr()` since we don't know how to
trigger failure of the respective `gdImage*Ctx()` calls.
This potential security issue has been reported by Solmaz Salimi (aka.
Rooney).
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This is preparation for adding some linting checks for new commits from
people. Shouldn't be any functional changes here (tests still pass!).
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This makes the code better readable in the sources, and we get syntax
highlighting in the generated HTML wherever we want it (i.e. not necessarily
always as with `-hl all`).
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To do so we have to add Menu.txt to the project, but we can ignore
Languages.txt and Topics.txt, at least for now.
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When given invalid inputs, we might be fed the EOF marker before it is
actually the EOF. The gif logic assumes once it sees the EOF marker,
there won't be any more data, so it leaves the cur_bits index possibly
negative. So when we get more data, we underflow the masks array.
Flag it so we don't try to output anything more. The image is invalid,
so we shouldn't be truncating any valid inputs.
This fixes #209.
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This changeset imports documention for gdImage to gdImagePng*() into
Natural Docs. Documention is based on the text of the original
manual, version 2.0.36 but adapted to better suit the format.
Subsequent changesets will introduce docs for subsequent manual
entries.
naturaldocs, when present, is invoked by bootstrap.sh. The completed
manual will be in docs/naturaldocs/html/index.html. It can also be
explicitly invoked by running docs/naturaldocs/run_docs.sh.
This change also removed docs/naturaldocs/project/Menu.txt, since it
currently contains no non-generated content and is prone to introduce
noise into the changeset.
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resource leaks and some other minor errors
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* gdImageCreateFrom*() returns null if null pointer given
* gdImage*() puts nothing if null pointer given
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