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Fonts: Fixed CalcTextSize() width rounding so it behaves more like a ceil. (#3776)

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his is in order for text wrapping to have enough space when provided width precisely calculated with CalcTextSize().x. Amend 7b0bf230.
Note that the rounding of either positions and widths are technically undesirable (e.g. #3437, #791) but variety of code is currently on it so we are first fixing current behavior before we'll eventually change it.
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ocornut 2021-02-01 12:48:33 +01:00
parent 9499afdf5e
commit 4622fa4b66
2 changed files with 9 additions and 1 deletions
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6
imgui.cpp
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@ -4410,7 +4410,11 @@ ImVec2 ImGui::CalcTextSize(const char* text, const char* text_end, bool hide_tex
ImVec2 text_size = font->CalcTextSizeA(font_size, FLT_MAX, wrap_width, text, text_display_end, NULL);
// Round
text_size.x = IM_FLOOR(text_size.x + 0.95f);
// FIXME: This has been here since Dec 2015 (7b0bf230) but down the line we want this out.
// FIXME: Investigate using ceilf or e.g.
// - https://git.musl-libc.org/cgit/musl/tree/src/math/ceilf.c
// - https://embarkstudios.github.io/rust-gpu/api/src/libm/math/ceilf.rs.html
text_size.x = IM_FLOOR(text_size.x + 0.99999f);
return text_size;
}