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Added Fonts readme details and links to Sweet16 font. (#2085)

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omar 2018-09-17 13:15:57 +02:00
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37
misc/fonts/README.txt
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@ -1,9 +1,11 @@
The code in imgui.cpp embeds a copy of 'ProggyClean.ttf' (by Tristan Grimmer) that is used by default.
We embed the font in source code so you can use Dear ImGui without any file system access.
The code in imgui.cpp embeds a copy of 'ProggyClean.ttf' (by Tristan Grimmer),
a 13 pixels high, pixel-perfect font used by default.
We embed it font in source code so you can use Dear ImGui without any file system access.
You may also load external .TTF/.OTF files.
The files in this folder are suggested fonts, provided as a convenience.
(Note: .OTF support in stb_truetype.h currently doesn't appear to load every font)
(Note: .OTF support in imstb_truetype.h currently doesn't appear to load every font)
Fonts are rasterized in a single texture at the time of calling either of io.Fonts->GetTexDataAsAlpha8()/GetTexDataAsRGBA32()/Build().
Also read dear imgui FAQ in imgui.cpp!
@ -11,6 +13,7 @@ Also read dear imgui FAQ in imgui.cpp!
If you have other loading/merging/adding fonts, you can post on the Dear ImGui "Getting Started" forum:
https://discourse.dearimgui.org/c/getting-started
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INDEX:
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@ -35,7 +38,7 @@ If you have other loading/merging/adding fonts, you can post on the Dear ImGui "
u8"hello"
u8"こんにちは" // this will be encoded as UTF-8
- If you want to include a backslash \ character in your string literal, you need to double them e.g. "folder\\filename".
- Please use the Discourse forum (https://discourse.dearimgui.org) and not the Github issue tracker.
- Please use the Discourse forum (https://discourse.dearimgui.org) and not the Github issue tracker for basic font loading questions.
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@ -68,7 +71,11 @@ If you have other loading/merging/adding fonts, you can post on the Dear ImGui "
io.Fonts->AddFontFromFileTTF("fonts/fontawesome-webfont.ttf", 13.0f, &config, icon_ranges);
// Usage, e.g.
ImGui::Button(ICON_FA_SEARCH " Search"); // C string literals can be concatenated at compilation time, this is the same as "A" "B" becoming "AB"
ImGui::Button(ICON_FA_SEARCH " Search");
// C string _literals_ can be concatenated at compilation time, e.g. "hello" " world"
// ICON_FA_SEARCH is defined as a string literal so this is the same as "A" "B" becoming "AB"
// Usage, e.g.
ImGui::Text("%s among %d items", ICON_FA_SEARCH, count);
See Links below for other icons fonts and related tools.
@ -124,12 +131,13 @@ If you have other loading/merging/adding fonts, you can post on the Dear ImGui "
// Add character ranges and merge into the previous font
// The ranges array is not copied by the AddFont* functions and is used lazily
// so ensure it is available for duration of font usage
static const ImWchar icons_ranges[] = { 0xf000, 0xf3ff, 0 }; // will not be copied by AddFont* so keep in scope.
// so ensure it is available at the time of building or calling GetTexDataAsRGBA32().
static const ImWchar icons_ranges[] = { 0xf000, 0xf3ff, 0 }; // Will not be copied by AddFont* so keep in scope.
ImFontConfig config;
config.MergeMode = true;
io.Fonts->AddFontFromFileTTF("DroidSans.ttf", 18.0f, &config, io.Fonts->GetGlyphRangesJapanese());
io.Fonts->AddFontFromFileTTF("fontawesome-webfont.ttf", 18.0f, &config, icons_ranges);
io.Fonts->Build();
Add a fourth parameter to bake specific font ranges only:
@ -153,12 +161,15 @@ If you have other loading/merging/adding fonts, you can post on the Dear ImGui "
FREETYPE RASTERIZER, SMALL FONT SIZES
---------------------------------------
Dear Imgui uses stb_truetype.h to rasterize fonts (with optional oversampling).
This technique and implementation are not ideal for fonts rendered at _small sizes_, which may appear a little blurry.
Dear ImGui uses imstb_truetype.h to rasterize fonts (with optional oversampling).
This technique and its implementation are not ideal for fonts rendered at _small sizes_, which may appear a
little blurry or hard to read.
There is an implementation of the ImFontAtlas builder using FreeType that you can use in the misc/freetype/ folder.
FreeType supports auto-hinting which tends to improve the readability of small fonts.
Note that this code currently creates textures that are unoptimally too large (could be fixed with some work)
Note that this code currently creates textures that are unoptimally too large (could be fixed with some work).
Also note that correct sRGB space blending will have an important effect on your font rendering quality.
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@ -174,7 +185,9 @@ If you have other loading/merging/adding fonts, you can post on the Dear ImGui "
builder.AddChar(0x7262); // Add a specific character
builder.AddRanges(io.Fonts->GetGlyphRangesJapanese()); // Add one of the default ranges
builder.BuildRanges(&ranges); // Build the final result (ordered ranges with all the unique characters submitted)
io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_in_pixels, NULL, ranges.Data);
io.Fonts->Build(); // Build the atlas while 'ranges' is still in scope and not deleted.
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@ -242,6 +255,10 @@ If you have other loading/merging/adding fonts, you can post on the Dear ImGui "
(Icons) IcoMoon - Custom Icon font builder
https://icomoon.io/app
(Pixel perfect) Sweet16, Sweet16 Mono, by Martin Sedlak (Latin + Supplemental + Extended A)
https://github.com/kmar/Sweet16Font
Also include .inl file to use directly in dear imgui.
(Regular) Open Sans Fonts
https://fonts.google.com/specimen/Open+Sans