tomato-testing/docs/FONTS.md
Green Sky 5af8cfa879 Squashed 'external/imgui/imgui/' changes from d4ddc46e77..d6cb3c923d
d6cb3c923d Version 1.90.1
6470e2279e Debug Tools: DebugRenderKeyboardPreview() scales better.
fdf8d02be1 Debug Tools: Added io.ConfigDebugIsDebuggerPresent and Debug Break buttons. (#2673)
788bb58b6b Metrics: Tweak, reorganize tools menu.
a5dec42866 Debug Tools: Debug Log: Clicking any filter with SHIFT held enables it for 2 frames only. (#5855)
a3eea8a75a Backends: OpenGL3: Update GL3W based imgui_impl_opengl3_loader.h to load "libGL.so" and variants, fixing regression on distros missing a symlink. (#6983)
69bf3291df Internals, Inputs: Fix for ImGuiInputFlags_RepeatUntilXXX logic when #ifdef IMGUI_DISABLE_OBSOLETE_KEYIO is not set.
af00b182e3 Examples: SDL3: Minor fixes following changes to API (SDL_WindowFlags -> Uint32).
fc2e532f99 Shortcut: do not return true on mods changes. Internals: added ImGuiInputFlags_RepeatUntilKeyModsChange, ImGuiInputFlags_RepeatUntilKeyModsChangeFromNone, ImGuiInputFlags_RepeatUntilOtherKeyPress. (#456, #2637)
8323a06e6d Inputs: passing ImGuiInputFlags_RepeatXXX options automatically adds ImGuiInputFlags_Repeat.
58261dbe9a Internals: alter ImGuiInputFlags values to leave room + indent.
f1ae47c4b9 Docs: update links to Proggy Fonts. (#7211)
7f9533b840 ColorPicker: Fixed saturation/value cursor radius not scaling properly.
27e83c2953 Add comment about how ImGuiKey values are named after US keyboard keys. (#7205)
278cf1a7bc Readme: updated binaries. (#7193)
edeb8ee3ab More compact issue_template.yml
c6716f5e9f Fixed typo (#7197)
a1b06823fe Windows: BeginChild(): Resize borders rendered even when ImGuiWindowFlags_NoBackground is specified. (#1710, #7194)
0461ade24b Reworked issue template (amends) (#5927, #5915)
c528b688cf Reworked issue template. (#5927, #5915)
26eef4df87 Update issue_template.md
7938550d52 Comments and some extra line-wrapping in demo (#3193)
4758f74676 imgui_freetype: fix nullptr to ImTextureID cast (#7192)
6f10cef2a1 Backends: Vulkan: moved structure declarations.
33d18c580b Misc: During shutdown, check that io.BackendPlatformUserData and io.BackendRendererUserData are NULL. (#7175)
0ea99132c8 Backends: Vulkan: Stop creating command pools with VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT as we don't reset them.
4778560e66 Backends: Vulkan: Added MinAllocationSize field in ImGui_ImplVulkan_InitInfo to workaround zealous validation layer. (#7189, #4238)
e8dd47effa Backends: WebGPU: Fixing an issue when opening a popup in the wgpu backend (#7191)
718fa0eec6 Happy new year!
240ab5890b Backends: GLFW, Input: Use Unicode version of WndProc for get correct input for text in utf-8 code page. (#7174)
4a2426449a Drags, Sliders, Inputs: removed all attempts to filter non-numerical characters during text editing. (#6810, #7096)
f039e69b9c Settings: Fixed an issue marking settings as dirty when merely clicking on a border or resize grip without moving it.
8340a30d27 Debug: move debug assertion in post-clip code to reduce overhead. (#4796 and more).
1e1013085b Debug Tools: Debug Log: Hide its own clipper log to reduce noise in the output.
036a6c875e ColorEdit4: Further tweaks for very small sizes. (#7120, #7121)
0bd6489721 DragScalarN, SliderScalarN, InputScalarN, PushMultiItemsWidths: fixed multi-components width in tight space (#7120, #7121)
0000739c08 Internals: Fixed function name typo.
33d426842d Backends: Vulkan: ImGui_ImplVulkan_CreateFontsTexture() calls vkQueueWaitIdle() instead of vkDeviceWaitIdle(). (#7148, #6943, #6715, #6327, #3743, #4618)
3cb805489b Backends: GLFW, Emscripten: fixes for canvas resizing, amends. (#6751)
22a7d241ff Backends: GLFW, Emscripten: fixes for canvas resizing. (#6751)
b4c5a83cfe Commented out obsolete ImGuiKey_KeyPadEnter redirection to ImGuiKey_KeypadEnter. (#2625, #7143)
70f2aaff43 Nav: tabbing happen within FocusScope. ImGuiWindowFlags_NavFlattened make window inherit focus scope from parent.
55073aa7a3 Examples; SDL: added missing return values checks from SDL_CreateWindow() calls. (#7147)
8764a1b7c4 Backends: Vulkan: free FontCommandBuffer explicitely (not actually required in normal code path, unless ImGui_ImplVulkan_DestroyDeviceObjects is declared directly). (#7104)
089ed30323 Replace usages of ImGuiKey_KeyPadEnter with ImGuiKey_KeypadEnter. (#7143)
e265610a0c Fixes for MSVC code analyzer.
f59b54c6f4 Nav: Activation can also be performed with Keypad Enter. (#5606)
0d582dabf3 Fixed warning (amend 54c1bde)
6cfe3ddf52 InputTextMultiline: Tabbing through a multi-line text editor using ImGuiInputTextFlags_AllowTabInput doesn't activate it. (#3092, #5759, #787)
54c1bdeceb Internals: removed unused ImGuiItemStatusFlags_FocusedByTabbing. (#4449)
4afffa36e9 InputTextMultiline: Fixed Tab character input not repeating
f6836ff37f Misc: Rework debug display of texture id in Metrics window (amend) (#7090)
07dbd46ddd Misc: Rework debug display of texture id in Metrics window to avoid compile-error when ImTextureID is defined to be larger than 64-bits. (#7090)
34646627aa ColorEdit4: improve components width computation to better distribute the error (#7120) (#7123)
86512eac06 DragScalarN, SliderScalarN, InputScalarN, PushMultiItemsWidths: improve multi-components width computation to better distribute the error. (#7120, #7121)
03298fe875 Windows: Fixed some auto-resizing path using style.WindowMinSize.x (instead of x/y).  (#7106)
69f524ba95 DragScalarN, SliderScalarN, InputScalarN, PushMultiItemsWidths: Added when component <= 0. (#7095)
9d8de45313 Image(): comment and minor refactor to resurface the fact that a border size may be added. (#2118)
5366bd09bf Scrolling: internal scrolling value is rounded instead of truncated. (#6677)
c58d2c89c3 Tabs: Added ImGuiTabItemFlags_NoAssumedClosure to enable app to react on closure attempt. (#7084)
1fade35159 DragScalarN, SliderScalarN, InputScalarN, PushMultiItemsWidths: Fixed incorrect pushes into ItemWidth stack when number of components is 1. [#7095]
58ca5f6424 Shortcut(): clearer early out in SetShortcutRouting() -> CalcRoutingScore() path.
d72e1563d4 Removed CalcListClipping() marked obsolete in 1.86. (#3841) + comments
9a2985611c Backend: Android: Remove Redundant Check (#7093)
0b77980cab Moved Tables API related declarations to their own section in imgui.h
aaf157cfdd Commented out ImGuiFreeType::BuildFontAtlas() obsoleted in 1.81. Commented out legacy ImGuiColumnsFlags_XXX symbols redirecting to ImGuiOldColumnsFlags_XXX, obsoleted in 1.80.
1fd5ff7152 Avoid C++26 removed deprecated arithmetic conversion on enumerations. (#7088, #7089. #2983, #3040)
52886872f1 Misc: Added IMGUI_USER_H_FILENAME to change the path included when using IMGUI_INCLUDE_IMGUI_USER_H. (#7039)
5768de79e2 InputText, ColorEdit, ColorPicker: better support for undocumented ImGuiItemFlags_ReadOnly flag. (#7079, #211)
b112d73edb Menus: amend to clarify/fix static analyzer warning.  (#6671, #6926)
2ee40d3cf9 Menus: Tweaked hover slack logic, adding a timer to avoid situations where a slow vertical movements toward another parent BeginMenu() can keep the wrong child menu open. (#6671, #6926)
b4b864e40a Backends: Vulkan: Fixed mismatching allocator passed to vkCreateCommandPool() vs vkDestroyCommandPool(). (#7075)
d2b0167610 Fixed link error when using IMGUI_DISABLE_DEBUG_TOOLS
7965494ff3 Debug Tools: Added DebugFlashStyleColor() to identify a style color. Added to Style Editor.
c1a3c7f445 Fixed Clang zealous warnings
c6ec69c7c1 Using nullptr in remaining examples/backends locations. (#6313, #7071, #4537)
888834c636 Backends: Android: Fixed build breaking typo. (#7060)
077e4db772 Misc: Added extra courtesy ==/!= operators when IMGUI_DEFINE_MATH_OPERATORS is defined.
6f171a066d Nav, IO: SetNextFrameWantCaptureKeyboard(false) calls are not overrided back to true when navigation is enabled. (#6997)
1f3090a48d Backends: SDL3: Fix indent (#7062)
86891b0986 Backends: Android: ImGui_ImplAndroid_HandleInputEvent() takes a const AInputEvent* (#7060)
f37f6f67f6  Windows: BeginChild(): Fixed auto-resizing erroneously limiting size to host viewport minus padding. (#7063)
bce4db00bc Drag and Drop: Fixed drop target highlight on items temporarily pushing a widened clip rect. (#7049, #4281, #3272)
65a10410e3 Docs: Add suggestion to turn of char8_t behavior for C++20 (#7025)
61b8197942 Misc: Renamed some defines in imstb_textedit.h to avoid conflicts when using unity/jumbo builds.
3733b5064e Backends: SDL3: Fixed unused variable warning on master on some targets. (#7000)
c5c1c4134b Backends: OpenGL3: imgui_impl_opengl3_loader.h: change #define ARRAY_SIZE to GL3W_ARRAY_SIZE to avoid external conflicts (#7017, #7018)
7bb0a525c3 Fixed text functions fast-path for handling "%s" and "%.*s" to handle null pointers gracefully. (#7016, #3466, #6846)
3d083dbe1a Version 1.90.1 WIP
b81bd7ed98 Version 1.90.0
623bff23ce Windows: WindowMinSize not applied on AlwaysAutoResize window. (amend e2035a5)
f298491a8a Docs: amend/tweak details about using io.WantCaptureMouse. (#7012)
5de1312e1c SplitterBehavior: tweak to not assert due to floating point precision.
afadf74a53 BeginChild: undo child name simplification as it reveal an issue with handling of ### in child names.
46843b683b Fonts: minor/shallow amends (#6925)
ade4d0e08a Fonts: added support for RasterizerDensity to FreeType based atlas generator. (#6925)
ed29ff08ba Fonts: added support for RasterizerDensity in built-in atlas generator. (#6925)
abfb9269b5 Fonts: added RasterizerDensity to ImFontConfig. (#6925)
add915bdc4 Backends: SDL3: Updates for recent API changes. (#7000)
4ad5817aac Update backends/language lists
75c46a3930 Demo: Partly fix resizing constraint demo. (#6210, #5627)
fe6544622b SetNextWindowSizeConstraints() clarified parameters, fixed comments. (#1139, #3186, #3270)
454f36d2af Removed 'bool border' legacy versions of BeginChild() as they seemingly have no value other than confusing user and IDE.
44dbad64d7 Backends: Vulkan: Fixes for VK_NO_PROTOTYPES.
79a9e2fdfb Backends: Vulkan: (Breaking) full font upload is performed by ImGui_ImplVulkan_CreateFontsTexture(), no need for user code to create or provide a command-buffer. Removed ImGui_ImplVulkan_DestroyFontUploadObjects(). (#6943, #6715, #6327, #3743, #4618)
6e7b43b6c7 Backends: Vulkan: Added ImGui_ImplVulkan_DestroyFontsTexture(), made ImGui_ImplVulkan_CreateFontsTexture() destroy previous one. (#6943, #6715, #6327, #3743, #4618)
d0da79c572 Defining IMGUI_DISABLE_OBSOLETE_FUNCTIONS now automaticaly define IMGUI_DISABLE_OBSOLETE_KEYIO. (#4921)
ab522dd18c Removed IM_OFFSETOF() macro in favor of using offsetof() available in C++11. Kept redirection define. (#4537)
0f50b52da4 Backends: OpenGL3: Update GL3W based imgui_impl_opengl3_loader.h to load "libGL.so" instead of "libGL.so.1". (#6983)
5170a9d6dc Tables: Internals: renamed TableDrawContextMenu() to TableDrawDefaultContextMenu() for clarify.
fea52e29aa Tables: added flags to TableDrawContextMenu() in order to display selected sections + added internal table->DisableDefaultContextMenu = true way to submit your own contents.
0d3b468cb3 BeginChild(): added ImGuiChildFlags_AutoResizeX, ImGuiChildFlags_AutoResizeY, ImGuiChildFlags_AlwaysAutoResize + support for SetNextWindowSizeConstraints(). (#1666, #1395, #1496, #1710) + Demo
44345c2108 Better documented the difference between BeginListBox() and BeginChild() w/ ImGuiChildFlags_FrameStyle.
fa4c49b4a7 BeginChild(): resizing is only clamped on axis where there's no scrollbar. Added an extra ResizeX in Demo->Simple Layout.
cdbc21a191 BeginChild(): Added ImGuiChildFlags_FrameStyle as a replacement for BeginChildFrame(). (#1666, #1496, #1395, #1710, #462, #503, #263)
ab47efd9a0 Bits / comments
561af15d67 Internal: Added owner aware variant of IsMouseDoubleClicked() for consistency.
376035fd01 Nav: fixed programmatic nav calls (e.g. SetKeyboardFocusHere() from storing io.KeyMods)
cfc71ab7c5 Made ImDrawCallback_ResetRenderState special value -8 instead of -1 so it is pointer aligned (#6969)
1ab63d925f Undid some of the changes done by c95fbb4 because they are not compatible with docking code.
c0bc43ccff Offset values for ImGuiWindowFlags_NoNavInputs, ImGuiWindowFlags_NoNavFocus, ImGuiWindowFlags_UnsavedDocument.
f1d1a8d32b Windows: use relative mouse movement for border resize when the border geometry has moved. (#1710)
9235352400 BeginChild: Added ImGuiChildFlags_ResizeX and ImGuiChildFlags_ResizeY. (#1710)
34a0bc456e BeginChild: Added ImGuiChildFlags_AlwaysUseWindowPadding, obsoleted ImGuiWindowFlags_AlwaysUseWindowPadding. (#462, (toward #1666, #1496, #1395, #1710)
7713c29258 BeginChild: Upgraded 'bool border = true' parameter to use a ImGuiChildFlags type and the ImGuiChildFlags_Border value. (toward #1666, #1496, #1395, #1710)
88fec09715 ColorPicker4(): Fixed ImGuiColorEditFlags_NoTooltip when ImGuiColorEditFlags_NoSidePreview is also set. (#6957)
313676d200 Settings: omit outputing Collapsed=0 in .ini file. Changelog + docs tweaks
8ee85137d8 BeginChild(): Internal name used by child windows now omits the hash/id if the child window is submitted in root of id stack of parent window.
4e4042bc33 Windows: tidying up skipitems logic at end of Begin(), normally should be no meaningful side-effect.
bc3c6e74e6 Windows: fixed double-clicked border from showing highlighted at the new position.
e2035a514c Windows: shared code for CalcWindowMinSize().
c95fbb4464 Windows: Double-clicking bottom or right window border auto-resize on a singles axis.
ade2acfd1d Inputs: Added IsKeyChordPressed() public helper function.
1b9cb52d7b BeginChild(): rename parameters to reduce diff of upcoming patches.
f8dc03d702 Windows: Can also auto-resize by double-clicking lower-left resize grip (not only lower-right one).
56f7e853be Demo: expose more Combo flags + misc tidying up.
9a5da23553 Changelog formatting
d6d00b4fcf Moved BeginChild() above BeginChildEx() as it is more readable.
99913b5051 Internals: added IsKeyChordPressed() for consistency.
a8bdbfddf9 Tables: Fixed top-most and left-most outer border overlapping inner clip-rect when scrolling. (#6765)
8db02ef8df Tables: Fixed an issue with ScrollX enabled where an extraneous draw command would be created.
947255c3da Tooltips: made it possible to use ImGuiHoveredFlags_ForTooltip + a ImGuiHoveredFlags_DelayXXXX override. (#1485)
0b8c6b9bce Internals: removed seemingly unused AutoFitChildAxises.
12a3c77c2f Demo: Minor tweak to angled headers demo.
f96c5443b1 Tables: fixed angled headers with frozen columns.
32228d8add Tables: added Angled headers support. Added ImGuiTableColumnFlags_AngledHeader, ImGui::TableHeadersAngledRow(), style.TableAngledHeadersAngle. (#2957)
9f851ebfe4 Tables: added ImGuiTableFlags_HighlightHoveredColumn.
be1311cfc1 Tables: fixed double-clicking on a column from clearing HoveredColumnBorder for a frame.
08606714a3 Fixed incorrect assert in FocusTopMostWindowUnderOne() preventing child+popup from being used. (#6915, #718)
5053d79a24 Tables: Internal: rework so stacked headers height may be used.
b9ebb8e06f Tables: fixed right-clicking right-most section (past right-most column) from highlighting right-most column.
feddcf3030 Combo: amends for ImGuiComboFlags_WidthFitPreview. (#6881)
112d8fc41d Combo: added ImGuiComboFlags_WidthFitPreview. (#6881)
001f102f38 IO, Backends: added ImGuiKey_AppBack, ImGuiKey_AppForward. (#6891, #4921)
7bbd758681 Backends: Win32: revert oops chunk.
b0758c86d8 Backends: Added support for extra ImGuiKey values: F13 to F24 function keys. (#6891, #4921)
73346e4341 IO: Add extra keys to ImGuiKey enumerator: ImGuiKey_F13 to ImGuiKey_F24. (#6891, #4921)
0312a29e4c ImageButton(): clarify purpose of size. (#6901, #5533, #4471, #2464, #1390).
1107bffe84 Popups: clarified meaning of 'p_open != NULL' in BeginPopupModal() + set back user value to false when popup is closed in ways other than clicking the close button. (#6900)
2c07d581de TreeNode: Added ImGuiTreeNodeFlags_SpanAllColumns for use in tables. (#3151, #3565, #2451, #2438)
085ed7bfbe Drag and Drop: Rework drop target highlight. (#4281, #3272)
0dd756bceb Moved GetCursorScreenPos/SetCursorScreenPos on top of its section.
a63e2f0a33 Drag and Drop: Fixed submitting a tooltip from drop target location. Added demo.
64b1aeebf5 Backends: OpenGL3: rename gl3w's loader symbols to allow LTO compilation with another copy of gl3w. (#6875, #6668, #4445)
28b237f94d Separator(): Altered end-points to use more standard boundaries. (#205, #4787, #1643, #759)
330d763477 Separator: clarified setting the ImGuiSeparatorFlags_SpanAllColumns flag. (#759)
a61438740d Debug Tools: Metrics: Added "Show groups rectangles" in tools.
701a047ac0 Fonts: Fix clang compiling warning & error with freetype + lunasvg (#6873, #6842, #6591)
03e2a7f584 Debug Tools: Rename ShowIdStackToolWindow() -> ShowIDStackToolWindow(). (#4631)
c21278eeae Debug Tools: Rename ShowIdStackToolWindow() -> ShowIDStackToolWindow(). (#4631)
2f431a948c IO: removed io.MetricsActiveAllocations introduced in 1.63. Same as 'g.DebugMemAllocCount - g.DebugMemFreeCount' (still displayed in Metrics.
f1519efb16 BeginGroup(): fix/amend 9ece0bd.
456aa3bc0a Menus: Fixed a bug where activating an item in a child-menu and dragging mouse over the parent-menu would erroneously close the child-menu. (#6869)
9ece0bdc02 BeginGroup(): Fixed a bug pushing line lower extent too far down when called after a call to SameLine() followed by manual cursor manipulation.
8175a47881 Debug Tools: Renamed ShowStackToolWindow() ("Stack Tool") to ShowIdStackToolWindow() ("ID Stack Tool"). (#4631)
204ae8a407 Internals: added ImRect::ContainsWithPad()
94da5842ef Renamed ImFloor() to ImTrunc(). Renamed ImFloorSigned() to ImFloor(). (#6861)
e5ca5351d5 TabBar: Fixed position of unsaved document marker (ImGuiTabItemFlags_UnsavedDocument) which was accidentally offset in 1.89.9. (#6862)
72ae6f5200 Fixed MousePosPrev with has never been valid outside of NewFrame().
12ee2dd789 Backends: Win32: Synthesize key-down event on key-up for VK_SNAPSHOT / ImGuiKey_PrintScreen as Windows doesn't emit it. (#6859)
d4869207e3 Misc: Most text functions also treat "%.*s" (along with "%s") specially to avoid formatting. (#3466, #6846)
f4790f6f66 BeginItemTooltip: Rename flag in comment (#6853)
daf49e9d82 Made ImFileOpen reuse a memory buffer so .ini saving doesn't allocate once every time. Added commented out MemAlloc/MemFree debug log.
d6360c1ba9 Fonts, imgui_freetype: Fixed a warning and leak in IMGUI_ENABLE_FREETYPE_LUNASVG support. (#6842, #6591)
6c022f9bf1 IO, Inputs: rename SetMousePos() to TeleportMousePos(). (#6837, #228)
ff36fe365e IO, Inputs: setting io.WantSetMousePos ignores incoming MousePos events. (#6837, #228)
ef8ff1b5d8 TabBar, Style: added style.TabBarBorderSize and associated ImGuiStyleVar_TabBarBorderSize. (#6820, #4859, #5022, #5239)
6addf28c4b Fonts: Ensure calling AddFontXXX function doesn't invalidates ImFont's ConfigData pointers prior to building again. (#6825)
b101cf46b6 ListBox, Combo: Changed signature of "name getter" callback in old one-liner ListBox()/Combo() apis.
8a2cd81091 TypingSelect: always enable nav highlight.
223b19f116 Fixed warning when builidng with IMGUI_DISABLE_DEBUG_TOOLS.
779568bb38 TypingSelect: tidy up some more + split ino functions to make reuse simpler.
661a70fc79 TypingSelect: fast switch between characters in + debug, internal renames.
32171a8b0c Fonts: Better assert during load when passing truncated font data or wrong data size. (#6822)
c32db3c72b Tables: Fixed an edge-case when no columns are visible + table scrollbar is visible + user code is always testing return value of TableSetColumnIndex() to coarse clip.
c86ce70968 Internal: Nav,MultiSelect: import ImGuiSelectionUserData, SetNextItemSelectionUserData() from MultiSelect. Track NavLastValidSelectionUserData as a convenience.
f336e639e9 TypingSelect: rework GetTypingSelectRequest(), provide TypingSelectFindResult().
9714594c35 Tooltips: made using SetItemTooltip()/IsItemHovered(ImGuiHoveredFlags_ForTooltip) defaults to activate tooltips on disabled items.. (#1485)
6eb2681c09 Internals: InitOrLoadWindowSettings() clear Size again for better data nuking in tests. Debug Log: added ImGuiDebugLogFlags_OutputToTestEngine flag.
bed492da70 Tables: amend support for auto-resize. (#6807)
556a1397a9 Tables: Remove comment referencing removed field SortSign (#6807)
3aceb61059 Tables: Request user to submit contents when outer host-window is requesting auto-resize. (#6510)
da21b74313 Tables: Fixed subtle drawing overlap between borders in some situations. (#2957, #6765)
5a483c2ffb Tables: Fixed top-most outer border being drawn with both TableBorderLight and TableBorderStrong in some situations, causing the earlier to be visible underneath when alpha is not 1.0f.
a34071876f Tables: Fixed bottom-most and right-most outer border offset by one. (#6765, #3752)
357f752bed Docs: add more links to the top of every examples and backends files.
b9ab6e2019 Nav: Tabbing always enable nav highlight when ImGuiConfigFlags_NavEnableKeyboard is set. (#6802, #3092, #5759, #787)
0e1ce76ea8 InputTextMultiline: Fixed Tabbing cycle leading to a situation where Enter key wouldn't be accepted by the widget when navigation highlight is visible. (#6802, #3092, #5759, #787)
bd63a9f056 Fonts: 'float size_pixels' passed to AddFontXXX() functions is now rounded to lowest integer. (#3164, #3309, #6800)
0962c9fb72 TypingSelect: Added first version of GetTypingSelectRequest() API.
7812039402 ImVector: Added find_index() helper.
44a6b493ee Commented out obsolete ImDrawCornerFlags_XXX. Commented out runtime support for hardcoded ~0 or 0x01..0x0F rounding flags values for AddRect()/AddRectFilled()/PathRect()/AddImageRounded()
becd75676f Commented out obsolete redirecting function: GetWindowContentRegionWidth().
727c462069 Internals: Added ImTextFindPreviousUtf8Codepoint() helper + comments.
c9d3c29aa3 Backend: Win32: support keyboard codepage conversion for when compiling in MBCS mode and creating a non-Unicode window. (#6785, #6782, #5725)
e3d9b875c9 ImDrawList: added PathEllipticalArcTo(), AddEllipse(), AddEllipseFilled(). (#2743)
fa2e5710ac MenuBar: Fixed an issue where layouting an item in the menu-bar would erroneously egister contents size. (#6789)
56a7b8b724 Backends: GLFW: Clear emscripten's MouseWheel callback before shutdown. (#6790, #6096, #4019)
d8ef864b02 InputTextMultiline: Fixed a crash pressing Down on last empty line of a multiline buffer. (#6783, #6000)
cf1c4a0cb1 BeginListBox(): fixed not consuming SetNextWindowXXX data when returning false.
fb9b006865 Version 1.90 WIP
f24387fa2b Version 1.89.9 (fixed changelog header)
c4dc8fd101 Docs: Update FONTS.md (#6781, #6632, #6339, #5763, #5330, #2234, #2042, #1259, #951, #220)
c6e0284ac5 Fixed minor warning.
fef3389157 Version 1.89.9
7b5fb33296 Tables: Internals: renamed CellPaddingY to RowCellPaddingY.
bdc4dfebf5 Tables: Amend support for cross-cell SameLine() for first column. Amend 9a93fb5 + 8f5ce73.
9a93fb5716 Tables: Fixed support for cross-cell SameLine() by preserving Line Y1 position. Amend 8f5ce73.
e8a5c9e1b8 Tables: Made it possible to change style.CellPadding.y between rows. Added demo.
3816d478df ImDrawList: small debug-mode optimization when calling AddRect() without rounding + Selectable: small debug-mode optimization.
8c497793f9 Demo: Tweak table sorting demo code.
303dc091b4 Revert "IO: ImGuiMod_Shortcut (Ctrl/Cmd depending on platform) is reflected in io.KeyMods. (#5923, #456)"
b8f93a8fe0 IO: ImGuiMod_Shortcut (Ctrl/Cmd depending on platform) is reflected in io.KeyMods. (#5923, #456)
a066074054 Clipper: Fixed a bug if attempt to force-include a range which matches an already included range. (#3841)
bdd9b96fa3 Demo: Reorganized "Examples" menu. Tweak Property Editor.
08b3a1a34a ImDrawList: Automatically calling ChannelsMerge() if not done after a split.
f93d0befaf Slider: fixed support for ImGuiItemFlags_ReadOnly/ImGuiSliderFlags_ReadOnly although it is technically unused/undocumented. (#6758)
d6e9fad60e Tables: Fix typo in TableGetSortSpecs comment + amend comment. (#6755)
82d177ccbd Using range-based for where it makes sense. (#4537)
33ea1e8b78 ColorEdit, ColorPicker: Manipulating options popup don't mark item as edited. (#6722)
f617fe7890 Clipper: Renamed IncludeRangeByIndices()/ForceDisplayRangeByIndices() to IncludeItemsByIndex(). (#6424, #3841)
200053771a Clipper: Added IncludeIndex() helper to include a single item. (#6424, #3841)
4a7810e992 Update README.md
981abb4612 Examples: Emscripten+webgpu: Fixed WGPUInstance creation process + use preferred framebuffer format. (#6640, #6748)
4a81424492 CloseButton, CollapseButton: don't include FramePadding into size. Use ItemInnerSpacing.x between title bar buttons. (#6749)
b41811a68c CollapseButton: handle clipping better + align circle like in docking branch.
040e818d72 Fix typo in SameLine comment (#6745)
162f8e01aa Backends: SDL3: fixed typo in 1e17d59 (#6735)
ba1fa904a9 IO: Exposed io.PlatformLocaleDecimalPoint to configure decimal point ('.' or ','). (#6719, #2278)
a1a7a1bc03 InputFloat, SliderFloat, DragFloat: always turn both '.' and ',' into the current decimal point character. (#6719, #2278)
a6857ede03 IO: fix writing to incorrect union section for MouseSource in AddMousePosEvent and AddMouseButtonEvent. (#6727, #2702)
c06c796242 TreeNode: added note about ImGuiTreeNodeFlags_Bullet.
1e17d59965 Backends: SDL2,SDL3: added ImGui_ImplSDL2_InitForOther() / ImGui_ImplSDL3_InitForOther().
983b95bc87 Demo: tweak explanation about static keyword. (#6718)
d2c7cbcbf9 Misc: Made multiple calls to Render() during the same frame early out faster.
ac64b65634 Render: draw dimmed background earlier to match docking code. (#6716)
8f5ce73140 Tables: Made it possible to use SameLine(0,0) after TableNextColumn() or TableSetColumnIndex() in order to reuse line height from previous cell.
1362fc0c56 Debug, Internals: Added DebugDrawCursorPos(), DebugDrawLineExtents() helpers.
bc3c0ce772 Nav, TreeNode: Pressing Left with ImGuiTreeNodeFlags_NavLeftJumpsBackHere now goes through proper navigation logic: honor scrolling and selection. (#1079, #1131)
edebb90a9a Demo: amend/fix for MinGW
4d6fbaff11 Demo: define standard PRI names we use (if missing) instead of defininig IM_PRId64, IM_PRIu64.
226923fa7e Metrics: Fixed "Drawlists" section and per-viewport equivalent appearing empty (regression from c649aca).
2b1fc6f765 Demo: Demonstrate out-of-order rendering using ImDrawListSplitter.
cf3726bcbc Internals: rename bg/fg drawlist holders in structs to reduce confusion.
52587c28d6 ImDrawList: Fixed OOB access in _CalcCircleAutoSegmentCount when passing excessively large radius to AddCircle(). (#6657, #5317)
f8c768760b Typo fix: _NoHostExtenY -> _NoHostExtendY (#6687)
c00e68102c Docs: update CONTRIBUTING.md
b7a7d673b9 Fixed an integer overflow and div-by-zero in SliderInt() when v_max is INT_MAX (#6675, #6679)
d6d94d90bf Version 1.89.9 WIP
f7eea63872 Version v1.89.8
ab490dc7b8 Fonts: Amends for support for OpenType SVG fonts using lunasvg (#6591, #6607)
2ad8c60abc Fonts: Added support for OpenType SVG fonts using lunasvg (#6591, #6607)
19ae142bdd Mark alternative ImColor constructors as constexpr, second attempt (#6656)
dc2b0a2823 Disable -Wreserved-identifier warning on Clang (applying to member fields seems excessively weird).
88a330ebef Revert "Mark alternative ImColor constructors as constexpr (#6656)"
fa2f1bfbb0 Examples: Vulkan: Fixed Vulkan descriptor pools. (#6642)
7c5b0e8292 Mark alternative ImColor constructors as constexpr (#6656)
eefc9035f0 Fonts: ImFontConfig::OversampleH now defaults to 2 instead of 3.
c87b9fdb15 Docs update. Improved Fonts troubleshooting section.
556ce9f543 imgui_stdlib: Fix warning (#6658)
79d6f4e211 Misc: Avoid stb_textedit.h reincluding string.h while in a namespace. (#6653, #4791)
f1781c20a3 Added IMGUI_DISABLE_STB_SPRINTF_IMPLEMENTATION config macro to disable stb_sprintf implementation (#6626)
1109de3827 Tooltips: fixed ImGuiHoveredFlags_ForTooltip conflicting with ImGuiHoveredFlags_NoNavOverride since 10c7709f. (#6622, #1485)
db66e33e9e Tables: fixed GetContentRegionAvail().y report not taking account of lower cell padding or of using ImGuiTableFlags_NoHostExtendY. (#6619)
2bc5d17ac3 Tables: fixed calculation of multi-instance shared decoration/scrollbar width of scrolling tables. (#5920, #6619)
e5977f05d8 Backends: GLFW: revert support for GLFW_CURSOR_DISABLED, let user use ImGuiConfigFlags_NoMouse. (#5625, #6609)
d342ec10cc Overlap, IsItemHovered: clarification on using IsItemHovered() on a non-reactive item after a reactive overlappable one. (#6610)
52125a54a5 Tables: added TableGetHoveredRow() in imgui_internal.h. (#6250, #6347, #6588, #3740)
77eba4d0d1 CI: resume using latest Emscripten
3dc3aef8a4 Backends: WebGPU: fix webgpu changes for Dawn. (#6602, #6188)
0e8eb8c48e Removed _MSC_VER <= 1500 checks for Visual Studio 2008 or earlier.
863ac31f01 Doc: various tweaks + tweak imconfig comments.
33e13c85e1 Backends: Made all backends sources files support global IMGUI_DISABLE. (#6601)
6888e6cdff ImDrawData: call _PopUnusedDrawCmd() later. as RenderDimmedBackgrounds() rely on a valid command being there (especially in docking branch). (#6406, #4879, #1878)
dbeeeae593 ImDrawData: Slight refactor so internal logic uses same logic as AddDrawList().  (#6406, #4879, #1878)
1a9ddd2396 ImDrawData: added AddDrawList() helper function. (#6406, #4879, #1878)
c649aca20a ImDrawData: changed CmdLists from raw array to ImVector<> owned by ImDrawData itself. Faclitate user-manipulation of the array (#6406, #4879, #1878) + deep swap. (#6597, #6475, #6167, #5776, #5109, #4763, #3515, #1860)
cc4c37dbac Nav: PageUp/PageDown always set NavJustMovedTo even when landing on same spot (which can trigger a selection).
b7cdb5a31e Scrollbar: layout needs to take account of window border size, so a border size will slightly reduce scrollbar size. (#2522)
5ce636b0ba Tweak to accomodate for build* directories anywhere.
140726d23f Fixed CTRL+Tab dimming background assert when target window has a callback in the last ImDrawCmd. (#4857, #5937)
b32ef809c3 InputText: Fixed a case where deactivation frame would write to underlying buffer or call CallbackResize although unnecessary, in a frame where the return value was false.
3349296370 InputText: Tweak ImGuiInputTextFlags_EscapeClearsAll handling so decision is taken on input buffer + Showcase a few more InputText() flags. (#5688, #2620)
6aa408c6af IO: Added io.ClearEventsQueue(). Obsoleted io.ClearInputCharacters(). (#4921)
9a15730c2a Demo: better showcase use of SetNextItemAllowOverlap(). (#6574, #6512, #3909, #517)
3fe4319314 Version 1.89.8 WIP

git-subtree-dir: external/imgui/imgui
git-subtree-split: d6cb3c923d28dcebb2d8d9605ccc7229ccef19eb
2024-01-17 20:29:18 +01:00

24 KiB

(You may browse this at https://github.com/ocornut/imgui/blob/master/docs/FONTS.md or view this file with any Markdown viewer)

Dear ImGui: Using Fonts

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 in the source code so you can use Dear ImGui without any file system access. ProggyClean does not scale smoothly, therefore it is recommended that you load your own file when using Dear ImGui in an application aiming to look nice and wanting to support multiple resolutions.

You may also load external .TTF/.OTF files. In the misc/fonts/ folder you can find a few suggested fonts, provided as a convenience.

Also read the FAQ: https://www.dearimgui.com/faq (there is a Fonts section!)

Index


Troubleshooting

A vast majority of font and text related issues encountered comes from 4 things:

(1) Invalid filename due to use of \ or unexpected working directory.

See About Filenames. AddFontXXX functions should assert if the filename is incorrect.

(2) Invalid UTF-8 encoding of your non-ASCII strings.

See About UTF-8 Encoding. Use the encoding viewer to confirm encoding of string literal in your source code is correct.

(3) Missing glyph ranges.

You need to load a font with explicit glyph ranges if you want to use non-ASCII characters. See Fonts Loading Instructions. Use Debug Tools confirm loaded fonts and loaded glyph ranges.

This is a current constraint of Dear ImGui (which we will lift in the future): when loading a font you need to specify which characters glyphs to load. All loaded fonts glyphs are rendered into a single texture atlas ahead of time. Calling either of io.Fonts->GetTexDataAsAlpha8(), io.Fonts->GetTexDataAsRGBA32() or io.Fonts->Build() will build the atlas. This is generally called by the Renderer backend, e.g. ImGui_ImplDX11_NewFrame() calls it. If you use custom glyphs ranges, make sure the array is persistent and available during the calls to GetTexDataAsAlpha8()/GetTexDataAsRGBA32()/Build().

(4) Font atlas texture fails to upload to GPU.

This is often of byproduct of point 3. If you have large number of glyphs or multiple fonts, the texture may become too big for your graphics API. The typical result of failing to upload a texture is if every glyph or everything appears as empty black or white rectangle. Mind the fact that some graphics drivers have texture size limitation. If you are building a PC application, mind the fact that your users may use hardware with lower limitations than yours.

Some solutions:

  • You may reduce oversampling, e.g. font_config.OversampleH = 1, this will half your texture size for a quality looss. Note that while OversampleH = 2 looks visibly very close to 3 in most situations, with OversampleH = 1 the quality drop will be noticeable. Read about oversampling here.
  • Reduce glyphs ranges by calculating them from source localization data. You can use the ImFontGlyphRangesBuilder for this purpose and rebuilding your atlas between frames when new characters are needed. This will be the biggest win!
  • Set io.Fonts.Flags |= ImFontAtlasFlags_NoPowerOfTwoHeight; to disable rounding the texture height to the next power of two.
  • Set io.Fonts.TexDesiredWidth to specify a texture width to reduce maximum texture height (see comment in ImFontAtlas::Build() function).
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How should I handle DPI in my application?

See FAQ entry.

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Fonts Loading Instructions

Load default font:

ImGuiIO& io = ImGui::GetIO();
io.Fonts->AddFontDefault();

Load .TTF/.OTF file with:

ImGuiIO& io = ImGui::GetIO();
io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels);

If you get an assert stating "Could not load font file!", your font filename is likely incorrect. Read About filenames carefully.

Load multiple fonts:

// Init
ImGuiIO& io = ImGui::GetIO();
ImFont* font1 = io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels);
ImFont* font2 = io.Fonts->AddFontFromFileTTF("anotherfont.otf", size_pixels);

In your application loop, select which font to use:

ImGui::Text("Hello"); // use the default font (which is the first loaded font)
ImGui::PushFont(font2);
ImGui::Text("Hello with another font");
ImGui::PopFont();

For advanced options create a ImFontConfig structure and pass it to the AddFont() function (it will be copied internally):

ImFontConfig config;
config.OversampleH = 2;
config.OversampleV = 1;
config.GlyphExtraSpacing.x = 1.0f;
ImFont* font = io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, &config);

Combine multiple fonts into one:

// Load a first font
ImFont* font = io.Fonts->AddFontDefault();

// 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 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()); // Merge into first font
io.Fonts->AddFontFromFileTTF("fontawesome-webfont.ttf", 18.0f, &config, icons_ranges);             // Merge into first font
io.Fonts->Build();

Add a fourth parameter to bake specific font ranges only:

// Basic Latin, Extended Latin
io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, nullptr, io.Fonts->GetGlyphRangesDefault());

// Default + Selection of 2500 Ideographs used by Simplified Chinese
io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, nullptr, io.Fonts->GetGlyphRangesChineseSimplifiedCommon());

// Default + Hiragana, Katakana, Half-Width, Selection of 1946 Ideographs
io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, nullptr, io.Fonts->GetGlyphRangesJapanese());

See Using Custom Glyph Ranges section to create your own ranges.

Example loading and using a Japanese font:

ImGuiIO& io = ImGui::GetIO();
io.Fonts->AddFontFromFileTTF("NotoSansCJKjp-Medium.otf", 20.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
ImGui::Text(u8"こんにちは!テスト %d", 123);
if (ImGui::Button(u8"ロード"))
{
    // do stuff
}
ImGui::InputText("string", buf, IM_ARRAYSIZE(buf));
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);

sample code output
(settings: Dark style (left), Light style (right) / Font: NotoSansCJKjp-Medium, 20px / Rounding: 5)

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Loading Font Data from Memory

ImFont* font = io.Fonts->AddFontFromMemoryTTF(data, data_size, size_pixels, ...);

IMPORTANT: AddFontFromMemoryTTF() by default transfer ownership of the data buffer to the font atlas, which will attempt to free it on destruction. This was to avoid an unnecessary copy, and is perhaps not a good API (a future version will redesign it). If you want to keep ownership of the data and free it yourself, you need to clear the FontDataOwnedByAtlas field:

ImFontConfig font_cfg;
font_cfg.FontDataOwnedByAtlas = false;
ImFont* font = io.Fonts->AddFontFromMemoryTTF(data, data_size, size_pixels, &font_cfg);
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Loading Font Data Embedded In Source Code

  • Compile and use binary_to_compressed_c.cpp to create a compressed C style array that you can embed in source code.
  • See the documentation in binary_to_compressed_c.cpp for instructions on how to use the tool.
  • You may find a precompiled version binary_to_compressed_c.exe for Windows inside the demo binaries package (see README).
  • The tool can optionally output Base85 encoding to reduce the size of source code but the read-only arrays in the actual binary will be about 20% bigger.

Then load the font with:

ImFont* font = io.Fonts->AddFontFromMemoryCompressedTTF(compressed_data, compressed_data_size, size_pixels, ...);

or

ImFont* font = io.Fonts->AddFontFromMemoryCompressedBase85TTF(compressed_data_base85, size_pixels, ...);
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Using Icon Fonts

Using an icon font (such as FontAwesome or OpenFontIcons) is an easy and practical way to use icons in your Dear ImGui application. A common pattern is to merge the icon font within your main font, so you can embed icons directly from your strings without having to change fonts back and forth.

To refer to the icon UTF-8 codepoints from your C++ code, you may use those headers files created by Juliette Foucaut: https://github.com/juliettef/IconFontCppHeaders.

So you can use ICON_FA_SEARCH as a string that will render as a "Search" icon.

Example Setup:

// Merge icons into default tool font
#include "IconsFontAwesome.h"
ImGuiIO& io = ImGui::GetIO();
io.Fonts->AddFontDefault();

ImFontConfig config;
config.MergeMode = true;
config.GlyphMinAdvanceX = 13.0f; // Use if you want to make the icon monospaced
static const ImWchar icon_ranges[] = { ICON_MIN_FA, ICON_MAX_FA, 0 };
io.Fonts->AddFontFromFileTTF("fonts/fontawesome-webfont.ttf", 13.0f, &config, icon_ranges);

Example Usage:

// Usage, e.g.
ImGui::Text("%s among %d items", ICON_FA_SEARCH, count);
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"

See Links below for other icons fonts and related tools.

Monospace Icons?

To make your icon look more monospace and facilitate alignment, you may want to set the ImFontConfig::GlyphMinAdvanceX value when loading an icon font.

Screenshot

Here's an application using icons ("Avoyd", https://www.avoyd.com): avoyd

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Using FreeType Rasterizer (imgui_freetype)

  • 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.
  • Read documentation in the misc/freetype/ folder.
  • Correct sRGB space blending will have an important effect on your font rendering quality.
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Using Colorful Glyphs/Emojis

  • Rendering of colored emojis is supported by imgui_freetype with FreeType 2.10+.
  • You will need to load fonts with the ImGuiFreeTypeBuilderFlags_LoadColor flag.
  • Emojis are frequently encoded in upper Unicode layers (character codes >0x10000) and will need dear imgui compiled with IMGUI_USE_WCHAR32.
  • Not all types of color fonts are supported by FreeType at the moment.
  • Stateful Unicode features such as skin tone modifiers are not supported by the text renderer.

colored glyphs

io.Fonts->AddFontFromFileTTF("../../../imgui_dev/data/fonts/NotoSans-Regular.ttf", 16.0f);
static ImWchar ranges[] = { 0x1, 0x1FFFF, 0 };
static ImFontConfig cfg;
cfg.OversampleH = cfg.OversampleV = 1;
cfg.MergeMode = true;
cfg.FontBuilderFlags |= ImGuiFreeTypeBuilderFlags_LoadColor;
io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\seguiemj.ttf", 16.0f, &cfg, ranges);
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Using Custom Glyph Ranges

You can use the ImFontGlyphRangesBuilder helper to create glyph ranges based on text input. For example: for a game where your script is known, if you can feed your entire script to it and only build the characters the game needs.

ImVector<ImWchar> ranges;
ImFontGlyphRangesBuilder builder;
builder.AddText("Hello world");                        // Add a string (here "Hello world" contains 7 unique characters)
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, nullptr, ranges.Data);
io.Fonts->Build();                                     // Build the atlas while 'ranges' is still in scope and not deleted.
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Using Custom Colorful Icons

As an alternative to rendering colorful glyphs using imgui_freetype with ImGuiFreeTypeBuilderFlags_LoadColor, you may allocate your own space in the texture atlas and write yourself into it. (This is a BETA api, use if you are familiar with dear imgui and with your rendering backend)

  • You can use the ImFontAtlas::AddCustomRect() and ImFontAtlas::AddCustomRectFontGlyph() api to register rectangles that will be packed into the font atlas texture. Register them before building the atlas, then call Build()`.
  • You can then use ImFontAtlas::GetCustomRectByIndex(int) to query the position/size of your rectangle within the texture, and blit/copy any graphics data of your choice into those rectangles.
  • This API is beta because it is likely to change in order to support multi-dpi (multiple viewports on multiple monitors with varying DPI scale).

Pseudo-code:

// Add font, then register two custom 13x13 rectangles mapped to glyph 'a' and 'b' of this font
ImFont* font = io.Fonts->AddFontDefault();
int rect_ids[2];
rect_ids[0] = io.Fonts->AddCustomRectFontGlyph(font, 'a', 13, 13, 13+1);
rect_ids[1] = io.Fonts->AddCustomRectFontGlyph(font, 'b', 13, 13, 13+1);

// Build atlas
io.Fonts->Build();

// Retrieve texture in RGBA format
unsigned char* tex_pixels = nullptr;
int tex_width, tex_height;
io.Fonts->GetTexDataAsRGBA32(&tex_pixels, &tex_width, &tex_height);

for (int rect_n = 0; rect_n < IM_ARRAYSIZE(rect_ids); rect_n++)
{
    int rect_id = rect_ids[rect_n];
    if (const ImFontAtlasCustomRect* rect = io.Fonts->GetCustomRectByIndex(rect_id))
    {
        // Fill the custom rectangle with red pixels (in reality you would draw/copy your bitmap data here!)
        for (int y = 0; y < rect->Height; y++)
        {
            ImU32* p = (ImU32*)tex_pixels + (rect->Y + y) * tex_width + (rect->X);
            for (int x = rect->Width; x > 0; x--)
                *p++ = IM_COL32(255, 0, 0, 255);
        }
    }
}
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About Filenames

Please note that many new C/C++ users have issues loading their files because the filename they provide is wrong due to incorrect assumption of what is the current directory.

Two things to watch for:

(1) In C/C++ and most programming languages if you want to use a backslash \ within a string literal, you need to write it double backslash \\. At it happens, Windows uses backslashes as a path separator, so be mindful.

io.Fonts->AddFontFromFileTTF("MyFiles\MyImage01.jpg", ...);   // This is INCORRECT!!
io.Fonts->AddFontFromFileTTF("MyFiles\\MyImage01.jpg", ...);  // This is CORRECT

In some situations, you may also use / path separator under Windows.

(2) Make sure your IDE/debugger settings starts your executable from the right working (current) directory. In Visual Studio you can change your working directory in project Properties > General > Debugging > Working Directory. People assume that their execution will start from the root folder of the project, where by default it often starts from the folder where object or executable files are stored.

io.Fonts->AddFontFromFileTTF("MyImage01.jpg", ...);       // Relative filename depends on your Working Directory when running your program!
io.Fonts->AddFontFromFileTTF("../MyImage01.jpg", ...);    // Load from the parent folder of your Working Directory
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About UTF-8 Encoding

For non-ASCII characters display, a common user issue is not passing correctly UTF-8 encoded strings.

(1) We provide a function ImGui::DebugTextEncoding(const char* text) which you can call to verify the content of your UTF-8 strings. This is a convenient way to confirm that your encoding is correct.

ImGui::SeparatorText("CORRECT");
ImGui::DebugTextEncoding(u8"こんにちは");

ImGui::SeparatorText("INCORRECT");
ImGui::DebugTextEncoding("こんにちは");

UTF-8 Encoding viewer

You can also find this tool under Metrics/Debuggers->Tools->UTF-8 Encoding viewer if you want to paste from clipboard, but this won't validate the UTF-8 encoding done by your compiler.

(2) To encode in UTF-8:

There are also compiler-specific ways to enforce UTF-8 encoding by default:

  • Visual Studio compiler: /utf-8 command-line flag.
  • Visual Studio compiler: #pragma execution_character_set("utf-8") inside your code.
  • Since May 2023 we have changed the Visual Studio projects of all our examples to use /utf-8 (see commit).

Or, since C++11, you can use the u8"my text" syntax to encode literal strings as UTF-8. e.g.:

ImGui::Text(u8"hello");
ImGui::Text(u8"こんにちは");   // this will always be encoded as UTF-8
ImGui::Text("こんにちは");     // the encoding of this is depending on compiler settings/flags and may be incorrect.

Since C++20, because the C++ committee hate its users, they decided to change the u8"" syntax to not return const char* but a new type const char8_t* which doesn't cast to const char*. Because of type usage of u8"" in C++20 is a little more tedious:

ImGui::Text((const char*)u8"こんにちは");

However, you can disable this behavior completely using the compiler option /Zc:char8_t- for MSVC and -fno-char8_t for Clang and GCC.

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Debug Tools

Metrics/Debugger->Fonts

You can use the Metrics/Debugger window (available in Demo>Tools) to browse your fonts and understand what's going on if you have an issue. You can also reach it in Demo->Tools->Style Editor->Fonts. The same information are also available in the Style Editor under Fonts.

Fonts debugging

UTF-8 Encoding Viewer**

You can use the UTF-8 Encoding viewer in Metrics/Debugger to verify the content of your UTF-8 strings. From C/C++ code, you can call ImGui::DebugTextEncoding("my string"); function to verify that your UTF-8 encoding is correct.

UTF-8 Encoding viewer

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Credits/Licenses For Fonts Included In Repository

Some fonts files are available in the misc/fonts/ folder:

Roboto-Medium.ttf, by Christian Robetson
Apache License 2.0
https://fonts.google.com/specimen/Roboto

Cousine-Regular.ttf, by Steve Matteson
Digitized data copyright (c) 2010 Google Corporation.
Licensed under the SIL Open Font License, Version 1.1
https://fonts.google.com/specimen/Cousine

DroidSans.ttf, by Steve Matteson
Apache License 2.0
https://www.fontsquirrel.com/fonts/droid-sans

ProggyClean.ttf, by Tristan Grimmer
MIT License
(recommended loading setting: Size = 13.0, GlyphOffset.y = +1)
http://www.proggyfonts.net/

ProggyTiny.ttf, by Tristan Grimmer
MIT License
(recommended loading setting: Size = 10.0, GlyphOffset.y = +1)
http://www.proggyfonts.net/

Karla-Regular.ttf, by Jonathan Pinhorn
SIL OPEN FONT LICENSE Version 1.1

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ICON FONTS

REGULAR FONTS

MONOSPACE FONTS

Pixel Perfect:

Regular:

Or use Arial Unicode or other Unicode fonts provided with Windows for full characters coverage (not sure of their licensing).

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