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(Breaking) Fonts: obsolete PushFont() default parameter.

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ocornut
2025-06-24 18:53:40 +02:00
parent 04a5b9c2cf
commit ca72eb0596
3 changed files with 45 additions and 31 deletions
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26
docs/CHANGELOG.txt
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@@ -73,17 +73,25 @@ Breaking changes:
Platform_GetWindowFramebufferScale() handler in 'docking' branch.
- Fonts: **IMPORTANT** on Font Sizing:
- Before 1.92, fonts were of a single size. They can now be dynamically sized.
- PushFont() API now has an optional size parameter. PushFontSize() was also added.
void PushFont(ImFont* font) --> void PushFont(ImFont* font, float size = 0.0f);
- Before 1.92: ImGui::PushFont() always used font "default" size specified in AddFont() call.
- Since 1.92: ImGui::PushFont() preserve the current font size which is a shared value.
- PushFont() API now has a REQUIRED size parameter.
void PushFont(ImFont* font) --> void PushFont(ImFont* font, float size);
- PushFont(font, 0.0f) // Change font and keep current size
- PushFont(NULL, 20.0f) // Keep font and change current size
- PushFont(font, 20.0f) // Change font and set size to 20.0f
- PushFont(font, style.FontSizeBase * 2.0f) // Change font and set size to be twice bigger than current size.
- PushFont(font, font->LegacySize) // Change font and set size to size passed to AddFontXXX() function. Same as pre-1.92 behavor, for fixed size fonts.
- To use old behavior:
- use 'ImGui::PushFont(font, font->LegacySize)' at call site (preferred).
- or set 'ImFontConfig::Flags |= ImFontFlags_DefaultToLegacySize' in AddFont() call
(not desirable as it requires e.g. all third-party code to be aware of it).
We intentionally didn't add a default parameter because it would make the long-term
transition more difficult.
- Kept inline redirection font. Will obsolete.
- External scale factors may be applied over the provided size.
This is why it is called 'FontSizeBase' in the style structure.
- ImFont::FontSize was removed and does not make sense anymore.
ImFont::LegacySize is the size passed to AddFont().
- Removed support for PushFont(NULL) which was a shortcut for "default font".
- Removed support for old PushFont(NULL) which was a shortcut for "revert to default font".
- Renamed/moved 'io.FontGlobalScale' to 'style.FontScaleMain'.
- Fonts: **IMPORTANT** on Font Merging:
- When searching for a glyph in multiple merged fonts: font inputs are now scanned in order
@@ -182,8 +190,8 @@ Breaking changes:
- renamed ImGuiFreeType::GetBuilderForFreeType() to ImGuiFreeType::GetFontLoader()
- old: io.Fonts->FontBuilderIO = ImGuiFreeType::GetBuilderForFreeType()
- new: io.Fonts.FontLoader = ImGuiFreeType::GetFontLoader();
- DrawList: Fixed a regression from 1.91.1 where a Begin()/PushFont()/AddImage() sequence
would not restore the correct atlas Texture Identifier when the PushFont() call used
- DrawList: Fixed a regression from 1.91.1 where a Begin()/PushFont()/AddImage() sequence
would not restore the correct atlas Texture Identifier when the PushFont() call used
a font from a different atlas. (#8694, caused by #3224, #3875, #6398, #7903)
- DrawList: Renamed ImDrawList::PushTextureID()/PopTextureID() to PushTexture()/PopTexture().
- Fonts: (users of custom rectangles)
@@ -332,7 +340,7 @@ Other changes:
one in docking (they accidentally diverged). (#8554)
- Windows: BeginChild(): fixed being unable to combine manual resize on one axis
and automatic resize on the other axis. (#8690)
e.g. neither ImGuiChildFlags_ResizeX | ImGuiChildFlags_AutoResizeY
e.g. neither ImGuiChildFlags_ResizeX | ImGuiChildFlags_AutoResizeY
or ImGuiChildFlags_ResizeY | ImGuiChildFlags_AutoResizeX worked before.
- TreeNode: added experimental flags to draw tree hierarchy outlines linking
parent and tree nodes: (#2920)
@@ -357,7 +365,7 @@ Other changes:
- TreeNode: fixed incorrect clipping of arrow/bullet when using ImGuiTreeNodeFlags_SpanAllColumns.
- InputText: fixed cursor positioning issue using up/down keys near end of lines while
editing non-ASCII text. (Regression from 1.91.2) (#8635, #7925)
- InputText: fixed a buffer overrun that could happen when using dynamically resizing
- InputText: fixed a buffer overrun that could happen when using dynamically resizing
buffers (e.g. imgui_stdlib.cpp for std::string, or ImGuiInputTextFlags_CallbackRezize)
and programmatically making an insertion. (#8689) [@ocornut, @m9710797]
- Tables: fixed TableHeader() eager vertical clipping of text which may be noticeable

20
imgui.cpp
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@@ -470,10 +470,11 @@ CODE
- With a legacy backend (< 1.92): Instead of setting io.FontGlobalScale = 1.0f/N -> set ImFontCfg::RasterizerDensity = N. This already worked before, but is now pretty much required.
- With a new backend (1.92+): This should be all automatic. FramebufferScale is automatically used to set current font RasterizerDensity. FramebufferScale is a per-viewport property provided by backend through the Platform_GetWindowFramebufferScale() handler in 'docking' branch.
- Fonts: **IMPORTANT** on Font Sizing: Before 1.92, fonts were of a single size. They can now be dynamically sized.
- PushFont() API now has an optional size parameter. PushFontSize() was also added.
- Before 1.92: ImGui::PushFont() always used font "default" size specified in AddFont() call.
- Since 1.92: ImGui::PushFont() preserve the current font size which is a shared value.
- PushFont() API now has a REQUIRED size parameter. PushFontSize() was also added.
- Before 1.92: PushFont() always used font "default" size specified in AddFont() call. It is equivalent to calling PushFont(font, font->LegacySize).
- Since 1.92: PushFont(font, 0.0f) preserve the current font size which is a shared value.
- To use old behavior: (A) use 'ImGui::PushFont(font, font->LegacySize)' at call site (preferred). (B) Set 'ImFontConfig::Flags |= ImFontFlags_DefaultToLegacySize' in AddFont() call (not desirable as it requires e.g. third-party code to be aware of it).
- Kept inline single parameter function. Will obsolete.
- Fonts: **IMPORTANT** on Font Merging:
- When searching for a glyph in multiple merged fonts: font inputs are now scanned in orderfor the first font input which the desired glyph. This is technically a different behavior than before!
- e.g. If you are merging fonts you may have glyphs that you expected to load from Font Source 2 which exists in Font Source 1. After the update and when using a new backend, those glyphs may now loaded from Font Source 1!
@@ -8901,23 +8902,22 @@ void ImGui::SetFontRasterizerDensity(float rasterizer_density)
UpdateCurrentFontSize(0.0f);
}
// If you want to scale an existing font size:
// - Use e.g. PushFontSize(style.FontSizeBase * factor) (= value before external scale factors applied).
// - Do NOT use PushFontSize(GetFontSize() * factor) (= value after external scale factors applied).
// If you want to scale an existing font size! Read comments in imgui.h!
void ImGui::PushFont(ImFont* font, float font_size_base)
{
ImGuiContext& g = *GImGui;
//if (font == NULL) // Before 1.92 (June 2025), PushFont(NULL) == PushFont(GetDefaultFont())
// font = g.Font;
IM_ASSERT(font != NULL);
IM_ASSERT(font_size_base >= 0.0f);
g.FontStack.push_back({ g.Font, g.FontSizeBase, g.FontSize });
if (font_size_base <= 0.0f)
if (font_size_base == 0.0f)
{
if (font->Flags & ImFontFlags_DefaultToLegacySize)
font_size_base = font->LegacySize; // Legacy: use AddFont() specified font size. Same as doing PushFont(font, font->LegacySize)
font_size_base = font->LegacySize; // Legacy: use AddFont() specified font size. Same as doing PushFont(font, font->LegacySize)
else
font_size_base = g.FontSizeBase; // Keep current font size
font_size_base = g.FontSizeBase; // Keep current font size
}
SetCurrentFont(font, font_size_base, 0.0f);
}
@@ -16909,7 +16909,7 @@ void ImGui::DebugNodeFont(ImFont* font)
Indent();
if (cfg->ShowFontPreview)
{
PushFont(font);
PushFont(font, 0.0f);
Text("The quick brown fox jumps over the lazy dog");
PopFont();
}

30
imgui.h
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@@ -493,21 +493,26 @@ namespace ImGui
IMGUI_API void SetScrollFromPosY(float local_y, float center_y_ratio = 0.5f); // adjust scrolling amount to make given position visible. Generally GetCursorStartPos() + offset to compute a valid position.
// Parameters stacks (font)
// - PushFont(font, 0.0f) // Change font and keep current size
// - PushFont(NULL, 20.0f) // Keep font and change current size
// - PushFont(font, 20.0f) // Change font and set size to 20.0f
// - PushFont(font, style.FontSizeBase * 2.0f) // Change font and set size to be twice bigger than current size.
// - PushFont(font, font->LegacySize) // Change font and set size to size passed to AddFontXXX() function. Same as pre-1.92 behavior.
// *IMPORTANT* before 1.92, fonts had a single size. They can now be dynamically be adjusted.
// - Before 1.92: PushFont() always used font default size.
// - Since 1.92: PushFont() preserve the current shared font size.
// - To use old behavior (single size font, size specified in AddFontXXX() call:
// - Use 'PushFont(font, font->LegacySize)' at call site
// - Or set 'ImFontConfig::Flags |= ImFontFlags_DefaultToLegacySize' before calling AddFont(), and then 'PushFont(font)' will use this size.
// *IMPORTANT* External scale factors are applied over the provided value. If you want to scale an existing font size:
// - OK: PushFontSize(style.FontSizeBase * 2.0f) (= value before external scale factors applied).
// - NOT OK: PushFontSize(GetFontSize() * 2.0f) (= value after external scale factors applied. External scale factors are: 'style.FontScaleMain * style.FontScaleDpi * maybe more').
IMGUI_API void PushFont(ImFont* font, float font_size_base = -1); // use NULL as a shortcut to push default font. Use <0.0f to keep current font size.
// - In 1.92 we have REMOVED the single parameter version of PushFont() because it seems like the easiest way to provide an error-proof transition.
// - PushFont(font) before 1.92 = PushFont(font, font->LegacySize) after 1.92 // Use default font size as passed to AddFontXXX() function.
// *IMPORTANT* external scale factors are applied over the provided size. If you want to scale an *existing* font size:
// - External scale factors are: 'style.FontScaleMain * style.FontScaleDpi' and maybe more.
// - CORRECT: PushFont(NULL, style.FontSizeBase) // use current unscaled size == does nothing
// - CORRECT: PushFont(NULL, style.FontSizeBase * 2.0f) // use current unscaled size x2 == make text twice bigger
// - INCORRECT: PushFont(NULL, GetFontSize()) // INCORRECT! use size after external factors applied == EXTERNAL SCALING FACTORS WILL APPLY TWICE!
// - INCORRECT: PushFont(NULL, GetFontSize() * 2.0f) // INCORRECT! use size after external factors applied == EXTERNAL SCALING FACTORS WILL APPLY TWICE!
IMGUI_API void PushFont(ImFont* font, float font_size_base_unscaled); // Use NULL as a shortcut to keep current font. Use 0.0f to keep current size.
IMGUI_API void PopFont();
IMGUI_API void PushFontSize(float font_size_base); // keep current font, change its size. Final 'font size = font_size_base * external scale factors'.
IMGUI_API void PopFontSize();
IMGUI_API ImFont* GetFont(); // get current font
IMGUI_API float GetFontSize(); // get current font size (= height in pixels) AFTER external scale factors applied. *IMPORTANT* DO NOT PASS THIS VALUE TO PushFont()/PushFontSize()! Use ImGui::GetStyle().FontSizeBase to get value before external scale factors.
IMGUI_API float GetFontSize(); // get current scaled font size (= height in pixels). AFTER external scale factors applied. *IMPORTANT* DO NOT PASS THIS VALUE TO PushFont()/PushFontSize()! Use ImGui::GetStyle().FontSizeBase to get value before external scale factors.
IMGUI_API ImFontBaked* GetFontBaked(); // get current font bound at current size // == GetFont()->GetFontBaked(GetFontSize())
// Parameters stacks (shared)
@@ -3756,7 +3761,7 @@ struct ImFontBaked
enum ImFontFlags_
{
ImFontFlags_None = 0,
ImFontFlags_DefaultToLegacySize = 1 << 0, // Legacy compatibility: make PushFont() calls without explicit size use font->LegacySize instead of current font size.
ImFontFlags_DefaultToLegacySize = 1 << 0, // Legacy compatibility: make `PushFont(font)` == `PushFont(font, font->LegacySize)`. Otherwise by default/shared current font size is used.
ImFontFlags_NoLoadError = 1 << 1, // Disable throwing an error/assert when calling AddFontXXX() with missing file/data. Calling code is expected to check AddFontXXX() return value.
ImFontFlags_NoLoadGlyphs = 1 << 2, // [Internal] Disable loading new glyphs.
ImFontFlags_LockBakedSizes = 1 << 3, // [Internal] Disable loading new baked sizes, disable garbage collecting current ones. e.g. if you want to lock a font to a single size. Important: if you use this to preload given sizes, consider the possibility of multiple font density used on Retina display.
@@ -3949,7 +3954,8 @@ struct ImGuiPlatformImeData
namespace ImGui
{
// OBSOLETED in 1.92.0 (from June 2025)
IMGUI_API void SetWindowFontScale(float scale); // Set font scale factor for current window. Prefer using PushFontSize(style.FontSizeBase * factor) or use style.FontScaleMain to scale all windows.
static inline void PushFont(ImFont* font) { IM_ASSERT(font != NULL); PushFont(font, font->LegacySize); }
IMGUI_API void SetWindowFontScale(float scale); // Set font scale factor for current window. Prefer using PushFont(NULL, style.FontSizeBase * factor) or use style.FontScaleMain to scale all windows.
// OBSOLETED in 1.91.9 (from February 2025)
IMGUI_API void Image(ImTextureRef tex_ref, const ImVec2& image_size, const ImVec2& uv0, const ImVec2& uv1, const ImVec4& tint_col, const ImVec4& border_col); // <-- 'border_col' was removed in favor of ImGuiCol_ImageBorder. If you use 'tint_col', use ImageWithBg() instead.
// OBSOLETED in 1.91.0 (from July 2024)