Unify SDL2 RWops and SDL3 IOStream operations for files, memory,
font resources, and WAV decoding. Keep stream close ownership explicit
and cover memory stream reads in both SDL configurations.
Add the compile-time SDL major version option and propagate it through
interface targets. Route SDL includes through C99 compatibility headers
while keeping SDL2 as the desktop and Emscripten default.
Let win/dialog.c and win/menubar.c define input_modal_string,
input_modal_number, menu_open and menu_init directly instead of
dispatching to them through wrappers.
Consolidate the Android and Emscripten implementations of the string/
number input dialogs into input_modal.c, and split the input-dialog API
out of menu.h into input_modal.h.
When a game defines no VolumeValancer[], fall back to two generic
channels so BGM and sound effects can be adjusted independently.
Volume controls are now always available, so drop the conditional menu
handling.
Switch the bundled mincho font from a Source Han Serif JP subset to a
subset of IPA Mincho, which has monospace ASCII glyphs.
IPA Mincho's hhea ascent/descent already match its OS/2 typo metrics, so
adjust_metrics.py is no longer needed. However, IPA Mincho is distributed
under the IPA Font License v1.0, under which a subset is a "Derived
Program"; Article 3.1(4) forbids the derived font's name from containing
the licensed program's name ("IPA"). Add rename_font.py to rewrite the
name table accordingly, and replace licenses/mincho.txt with the IPA Font
License.
This will set the process code page to UTF-8 on Windows 10 version 1903
or above, allowing Japanese file names to be handled correctly even if
the system locale is not Japanese.
`-texthook print` prints text to console, and `-texthook copy`
automatically copies text to clipboard (for use with text hooker tools).
On Windows, copy mode can be toggled from the menu bar.
kichikuou