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Provide fallback for missing fonts

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If the user-provided font can't be loaded, try to load the default font.
If the default font can't be loaded (e.g. xsystem4 isn't installed), try
to load the default font from the project directory.
This commit is contained in:
Nunuhara Cabbage
2020-09-04 20:54:35 -07:00
parent d30689a8fd
commit c432d8fa2d
1 changed files with 25 additions and 4 deletions
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src/text.c
+25 -4
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@@ -35,11 +35,22 @@
*/
#define MAX_FONT_SIZE 128
#define DEFAULT_FONT_GOTHIC "fonts/VL-Gothic-Regular.ttf"
#define DEFAULT_FONT_MINCHO "fonts/HanaMinA.ttf"
static const char *local_font_paths[] = {
[FONT_GOTHIC] = DEFAULT_FONT_GOTHIC,
[FONT_MINCHO] = DEFAULT_FONT_MINCHO
};
static const char *default_font_paths[] = {
[FONT_GOTHIC] = XSYS4_DATA_DIR "/" DEFAULT_FONT_GOTHIC,
[FONT_MINCHO] = XSYS4_DATA_DIR "/" DEFAULT_FONT_MINCHO
};
// TODO: install fonts on system, and provide run-time configuration option
const char *font_paths[] = {
[FONT_GOTHIC] = XSYS4_DATA_DIR "/fonts/VL-Gothic-Regular.ttf",
[FONT_MINCHO] = XSYS4_DATA_DIR "/fonts/HanaMinA.ttf"
[FONT_GOTHIC] = XSYS4_DATA_DIR "/" DEFAULT_FONT_GOTHIC,
[FONT_MINCHO] = XSYS4_DATA_DIR "/" DEFAULT_FONT_MINCHO
};
struct font {
@@ -74,6 +85,16 @@ static struct font_metrics font_metrics = {
}
};
static TTF_Font *open_font(enum font_face face, unsigned int size)
{
TTF_Font *font;
if ((font = TTF_OpenFont(font_paths[face], size)))
return font;
if ((font = TTF_OpenFont(default_font_paths[face], size)))
return font;
return TTF_OpenFont(local_font_paths[face], size);
}
bool gfx_set_font(enum font_face face, unsigned int size)
{
struct _font *ff = &font_table[face];
@@ -92,7 +113,7 @@ bool gfx_set_font(enum font_face face, unsigned int size)
// open font if needed
if (!ff->fonts[size].size) {
if (!(ff->fonts[size].font = TTF_OpenFont(font_paths[face], size))) {
if (!(ff->fonts[size].font = open_font(face, size))) {
WARNING("Error opening font: %s:%d", font_paths[face], size);
return false;
}