Instead of splitting everything at once, split off one line at a time.
The code could be more compact but I want to avoid using substr on the
very common special case when a string contains no newlines.
Asking FreeType for metrics before asking it for a render, when rendering
would compute the metrics anyway, is wasteful. Now the width of text, for
horizontal alignment purposes, is simply the width of the render.
In well-described fonts, this enables multi-line text (e.g. in manuals) to be
more readable.
The term "height" is also replaced with "line spacing" in Font's code.
This does away with per-link selector directories in link files. It is assumed
that, if a user has access to write files to be launched by an application at
some location, he or she also has access to write files in the previews/
subdirectory under it.
The alpha change is so that:
* some of the background is still visible, which includes the name of the
application for which the selector is being called, its description, and
text in the status bar;
* the preview, if bright, does not obscure the file names too much.
Selector previews are now shown full-screen (320x240) instead of being a
160x160px square on the right.
These issues are fixed:
* loadPNG gave RGBA surfaces unconditionally. Now it gives RGB surfaces if
its second parameter, defaulting to true, is false. This fixes adding per-
surface alpha values, because an RGBA surface ignores its per-surface value.
* Surface::loadImage is updated to receive a third parameter, defaulting to
true, to determine whether alpha is loaded.
* SurfaceCollection::defaultAlpha was never used.
* SurfaceCollection::defaultAlpha defaulted to false, so even if it were used,
it would have loaded images without alpha.
This commit ensures that a fully constructed Font object will not crash
gmenu2x when it is used, even if loading the font or initialising SDL_ttf
altogether has failed. Instead, it will render no text, but icons and
images are still drawn.
The proper way to signal an error would be to throw an exception and fail
to construct the Font object. However, gmenu2x does not use exceptions.
Since 2002-09-03, SDL_ttf performs reference counting on TTF_Init and
TTF_Quit. If two fonts were loaded concurrently via the Font class and
one was destructed, the destructor of the first object would call TTF_Quit,
making the second object unusable. The constructor now calls TTF_Init
unconditionally to prevent this situation.
The reference counting behavior was introduced in this SDL_ttf commit:
http://hg.libsdl.org/SDL_ttf/rev/fc0371908009
This breaks one thing: the "params" option of the links must be
only one parameter (without spaces). The only way to actually
set this option being to edit the config files manually, it is
pretty safe to assume it will never contain two parameters.
