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text: Error instead of crash when glyph does not fit into page

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Fixes #1626
This commit is contained in:
rdb 2024-03-27 10:58:35 +01:00
parent 8ea2301d16
commit 237d27dfd9
1 changed files with 26 additions and 8 deletions
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34
panda/src/text/dynamicTextFont.cxx
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@ -621,6 +621,9 @@ make_glyph(int character, FT_Face face, int glyph_index) {
render_distance_field(image, outline, bounds.xMin, bounds.yMin);
glyph = slot_glyph(character, int_x_size, int_y_size, advance);
if (glyph == nullptr) {
return nullptr;
}
if (!_needs_image_processing) {
copy_pnmimage_to_texture(image, glyph);
} else {
@ -633,6 +636,9 @@ make_glyph(int character, FT_Face face, int glyph_index) {
// other processing before it goes to the texture, we can just copy it
// directly into the texture.
glyph = slot_glyph(character, bitmap.width, bitmap.rows, advance);
if (glyph == nullptr) {
return nullptr;
}
copy_bitmap_to_texture(bitmap, glyph);
} else {
@ -660,6 +666,9 @@ make_glyph(int character, FT_Face face, int glyph_index) {
tex_x_size += outline * 2;
tex_y_size += outline * 2;
glyph = slot_glyph(character, int_x_size, int_y_size, advance);
if (glyph == nullptr) {
return nullptr;
}
if (outline != 0) {
// Pad the glyph image to make room for the outline.
@ -940,10 +949,7 @@ slot_glyph(int character, int x_size, int y_size, PN_stdfloat advance) {
if (page->is_empty()) {
// If we couldn't even put it on an empty page, we're screwed.
text_cat.error()
<< "Glyph of size " << x_size << " by " << y_size
<< " pixels won't fit on an empty page.\n";
return nullptr;
goto does_not_fit;
}
pi = (pi + 1) % _pages.size();
@ -954,15 +960,27 @@ slot_glyph(int character, int x_size, int y_size, PN_stdfloat advance) {
if (garbage_collect() != 0) {
// Yes, we just freed up some space. Try once more, recursively.
return slot_glyph(character, x_size, y_size, advance);
}
} else {
// No good; all recorded glyphs are actually in use. We need to make a
// new page.
// No good; all recorded glyphs are actually in use. We need to make a new
// page.
{
_preferred_page = _pages.size();
PT(DynamicTextPage) page = new DynamicTextPage(this, _preferred_page);
_pages.push_back(page);
return page->slot_glyph(character, x_size, y_size, _texture_margin, advance);
DynamicTextGlyph *glyph = page->slot_glyph(character, x_size, y_size, _texture_margin, advance);
if (glyph != nullptr) {
return glyph;
}
}
does_not_fit:
// If you get this error, increase text-page-size in Config.prc.
text_cat.error()
<< "Glyph of size " << x_size << " by " << y_size
<< " pixels won't fit on an empty page.\n";
return nullptr;
}
/**