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This is mainly to aid investigation of bug Trac #6310.
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This commit introduces the following changes:
1. Graphics::loadThumbnail()
Now returns a boolean and takes a new argument skipThumbnail which
defaults to false. In case of true, loadThumbnail() reads past the
thumbnail data in the input stream instead of actually loading the
thumbnail. This simplifies savegame handling where, up until now,
many engines always read the whole savegame metadata (including
the thumbnail) and then threw away the thumbnail when not needed
(which is in almost all cases, the most common exception being
MetaEngine::querySaveMetaInfos() which is responsible for loading
savegame metadata for displaying it in the GUI launcher.
2. readSavegameHeader()
Engines which already implement such a method (name varies) now take
a new argument skipThumbnail (default: true) which is passed
through to loadThumbnail(). This means that the default case for
readSavegameHeader() is now _not_ loading the thumbnail from a
savegame and just reading past it. In those cases, e.g.
querySaveMetaInfos(), where we actually are interested in loading
the thumbnail readSavegameHeader() needs to explicitely be called
with skipThumbnail == false.
Engines whose readSavegameHeader() (name varies) already takes an
argument loadThumbnail have been adapted to have a similar
prototype and semantics.
I.e. readSaveHeader(in, loadThumbnail, header) now is
readSaveHeader(in, header, skipThumbnail).
3. Error handling
Engines which previously did not check the return value of
readSavegameHeader() (name varies) now do so ensuring that possibly
broken savegames (be it a broken thumbnail or something else) don't
make it into the GUI launcher list in the first place.
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This flag is removed for a few reasons:
* Engines universally set this flag to true for widths > 320,
which made it redundant everywhere;
* This flag functioned primarily as a "force 1x scaler" flag,
since its behaviour was almost completely undocumented and users
would need to figure out that they'd need an explicit non-default
scaler set to get a scaler to operate at widths > 320;
* (Most importantly) engines should not be in the business of
deciding how the backend may choose to render its virtual screen.
The choice of rendering behaviour belongs to the user, and the
backend, in that order.
A nearby future commit restores the default1x scaler behaviour in
the SDL backend code for the moment, but in the future it is my
hope that there will be a better configuration UI to allow users
to specify how they want scaling to work for high resolutions.
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Thanks to N.E.C <beholdnec@gmail.com> for this.
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Added it into hasFeature() of all engines which returned `true` in
simpleSaveNames() before.
As mentioned in #788, SCI is not always using simple names, so it
doesn't have such feature now.
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Engines with "simple" savenames would support "Run in background" in
save/load dialog and gradual save slots unlocking. Other engines
save/load feature would be locked until save sync is over.
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Some backends like GCW0 do no support graphics >320x240 due to
the hardware limitation (downscaling is possible but it will ruin
the pixel hunting which is often part of the gameplay).
Instead of manually updating the list of engines, we now introduce
a new dependency.
I marked all relevant engines, but some, like tinsel, require more
work with putting their relevant high-res games under USE_HIGHRES
define.
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Polish version. Fix for bug #6591
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sound
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This is the final fix for bug #6590 - "HOPKINS-PL: Crash using computer
in office".
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Have simplified the parsing of the COMPUTAN.TXT file prior to looking at
supporting the Polish file format variant.
These change should have no functional difference, but improve the code
by removing a set-but-unused bool in the MenuItem structure, fixing a
number of repeated "magic" values to be explicit as various buffer sizes
and replacing usage of strcpy with the safer version from our Common
code etc.
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This previously crashed on the Polish version due to a variant file
format causing the parsing to make several invalid memory accesses.
This prevents this crash and any other in future, though it does not
fix the parsing of the variant file format.
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This shouldn't be a problem, as current client code either must find a
terminator when parsing the byte buffer or have preknowledge of the
buffer size from a file size or fixed call, so the appended null
termination will not cause issues. This change thus allows client code
to add sanity checks to prevent reading off the end of the buffer.
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The SoundManager filled the sound handles with zeroes, which made
the mixer confuse them with active sound handle zero. In my case,
this happened to be the intro music, and the music was stopped when
playWavSample() wrongly thought its sound handle was in use.
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optional text flag
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a11f579a3f1690cf55c5402b8453fbaef6dd16fb
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Each engine now only has to provide a single configure.engine file
adding the engine into the configure script, which then produces the
required other files automatically.
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This is now generated automatically by the configure script from the
engine directory names.
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This is the third and final commit enabling fully pluggable engines.
Now providing an engine folder contains a configure.engine, engine.mk
and engine-plugin.h file, it will be picked up automatically by the
configure script.
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This is the second part of allowing engines to be added dynamically.
Each folder in engines/ which must contain a file named "engine.mk"
containing the make definitions for that engine.
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This is the first part of allowing engines to be added dynamically.
They are placed into a folder in engines/ which must contain a file
named "configure.engine" to add the engine, which is pulled into the
top level configure script automatically.
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