(Breaking) Fonts: removed PushFontSize(), PopFontSize().

docs/CHANGELOG.txt

@@ -150,7 +150,7 @@ Breaking changes:
   ImGuiContext to create one, you'll need to call ImFontAtlasUpdateNewFrame() yourself.
   An assert will trigger if you don't.
 - Fonts: obsolete ImGui::SetWindowFontScale() which is not useful anymore. Prefer using
-  PushFontSize(style.FontSizeBase * factor) or to manipulate other scaling factors.
+  PushFont(NULL, style.FontSizeBase * factor) or to manipulate other scaling factors.
 - Fonts: obsoleted ImFont::Scale which is not useful anymore.
 - Fonts: changed ImFont::CalcWordWrapPositionA() to ImFont::CalcWordWrapPosition():
    - old: const char* CalcWordWrapPositionA(float scale, const char* text, ....);
@@ -270,7 +270,6 @@ Other changes:
 - Fonts: ImFontAtlas::AddFontXXX() functions may be called at any time during the frame.
 - Fonts: ImFontAtlas::AddFontXXX() can fail more gracefully if error handling is configured
   to not assert (this will be better exposed via future font flags).
-- Fonts: added ImGui::PushFontSize()/PopFontSize() functions.
 - Fonts: added style.FontScaleBase scaling factor (previously called io.FontGlobalScale).
 - Fonts: added style.FontScaleDpi scaling factor. This is designed to be be changed on
   per-monitor/per-viewport basis, which `io.ConfigDpiScaleFonts` does automatically.

docs/FAQ.md

@@ -572,7 +572,7 @@ Since 1.92 (June 2025) fonts may be dynamically used at any size.
 
 To change font size:
 ```cpp
-ImGui::PushFontSize(42.0f);
+ImGui::PushFont(NULL, 42.0f);
 ```
 To change font and font size:
 ```cpp

docs/FONTS.md

@@ -77,7 +77,7 @@ Future versions of Dear ImGui should solve this problem.
 
 v1.92 introduces a newer, dynamic font system. It requires backend to support the `ImGuiBackendFlags_HasTextures` feature:
 - Users of icons, Asian and non-English languages do not need to pre-build all glyphs ahead of time. Saving on loading time, memory, and also reducing issues with missing glyphs. Specifying glyph ranges is not needed anymore.
-- `PushFontSize()` may be used anytime to change font size.
+- `PushFont(NULL, new_size)` may be used anytime to change font size.
 - Packing custom rectangles is more convenient as pixels may be written to immediately.
 - Any update to fonts previously required backend specific calls to re-upload the texture, and said calls were not portable across backends. It is now possible to scale fonts etc. in a way that doesn't require you to make backend-specific calls.
 - It is possible to plug a custom loader/backend to any font source.

docs/TODO.txt

@@ -249,7 +249,6 @@ It's mostly a bunch of personal notes, probably incomplete. Feel free to query i
  - font: finish CustomRectRegister() to allow mapping Unicode codepoint to custom texture data
  - font: remove ID from CustomRect registration, it seems unnecessary!
  - font: make it easier to submit own bitmap font (same texture, another texture?). (#2127, #2575)
- - font: PushFontSize API (#1018)
  - font: MemoryTTF taking ownership confusing/not obvious, maybe default should be opposite?
  - font: storing MinAdvanceX per font would allow us to skip calculating line width (under a threshold of character count) in loops looking for block width
  - font/demo: add tools to show glyphs used by a text blob, display U16 value, list missing glyphs.

imgui.cpp

@@ -470,7 +470,7 @@ 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 a REQUIRED size parameter. PushFontSize() was also added.
+                         - PushFont() API now has a REQUIRED size parameter.
                          - 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).
@@ -498,7 +498,7 @@ CODE
                        - Fonts: specifying glyph ranges is now unnecessary. The value of ImFontConfig::GlyphRanges[] is only useful for legacy backends. All GetGlyphRangesXXXX() functions are now marked obsolete: GetGlyphRangesDefault(), GetGlyphRangesGreek(), GetGlyphRangesKorean(), GetGlyphRangesJapanese(), GetGlyphRangesChineseSimplifiedCommon(), GetGlyphRangesChineseFull(), GetGlyphRangesCyrillic(), GetGlyphRangesThai(), GetGlyphRangesVietnamese().
                        - Fonts: removed ImFontAtlas::TexDesiredWidth to enforce a texture width. (#327)
                        - Fonts: if you create and manage ImFontAtlas instances yourself (instead of relying on ImGuiContext to create one, you'll need to call ImFontAtlasUpdateNewFrame() yourself. An assert will trigger if you don't.
-                       - Fonts: obsolete ImGui::SetWindowFontScale() which is not useful anymore. Prefer using 'PushFontSize(style.FontSizeBase * factor)' or to manipulate other scaling factors.
+                       - Fonts: obsolete ImGui::SetWindowFontScale() which is not useful anymore. Prefer using 'PushFont(NULL, style.FontSizeBase * factor)' or to manipulate other scaling factors.
                        - Fonts: obsoleted ImFont::Scale which is not useful anymore.
                        - Fonts: generally reworked Internals of ImFontAtlas and ImFont. While in theory a vast majority of users shouldn't be affected, some use cases or extensions might be. Among other things:
                           - ImDrawCmd::TextureId has been changed to ImDrawCmd::TexRef.
@@ -8551,7 +8551,7 @@ ImVec2 ImGui::GetFontTexUvWhitePixel()
     return GImGui->DrawListSharedData.TexUvWhitePixel;
 }
 
-// Prefer using PushFontSize(style.FontSizeBase * factor), or use style.FontScaleMain to scale all windows.
+// Prefer using PushFont(NULL, style.FontSizeBase * factor), or use style.FontScaleMain to scale all windows.
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
 void ImGui::SetWindowFontScale(float scale)
 {
@@ -8732,8 +8732,6 @@ bool ImGui::IsRectVisible(const ImVec2& rect_min, const ImVec2& rect_max)
 // - SetFontRasterizerDensity() [Internal]
 // - PushFont()
 // - PopFont()
-// - PushFontSize()
-// - PopFontSize()
 //-----------------------------------------------------------------------------
 
 void ImGui::UpdateFontsNewFrame()
@@ -8854,7 +8852,7 @@ void ImGui::UpdateCurrentFontSize(float restore_font_size_after_scaling)
         if (g.CurrentTable == NULL || g.CurrentTable->CurrentColumn != -1) // See 8465#issuecomment-2951509561. Ideally the SkipItems=true in tables would be amended with extra data.
             return;
 
-    // Restoring is pretty much only used by PopFont()/PopFontSize()
+    // Restoring is pretty much only used by PopFont()
     float final_size = (restore_font_size_after_scaling > 0.0f) ? restore_font_size_after_scaling : 0.0f;
     if (final_size == 0.0f)
     {
@@ -8935,17 +8933,6 @@ void  ImGui::PopFont()
     g.FontStack.pop_back();
 }
 
-void    ImGui::PushFontSize(float font_size_base)
-{
-    ImGuiContext& g = *GImGui;
-    PushFont(g.Font, font_size_base);
-}
-
-void    ImGui::PopFontSize()
-{
-    PopFont();
-}
-
 //-----------------------------------------------------------------------------
 // [SECTION] ID STACK
 //-----------------------------------------------------------------------------

imgui.h

@@ -509,10 +509,8 @@ namespace ImGui
     //  - 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 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 float         GetFontSize();                                                  // get current scaled font size (= height in pixels). AFTER external scale factors applied. *IMPORTANT* DO NOT PASS THIS VALUE TO PushFont()! 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)
@@ -2232,7 +2230,7 @@ IM_MSVC_RUNTIME_CHECKS_RESTORE
 struct ImGuiStyle
 {
     // ImGui::GetFontSize() == FontSizeBase * (FontScaleMain * FontScaleDpi * other_scaling_factors)
-    float       FontSizeBase;               // Current base font size before external scaling factors are applied. Use PushFont()/PushFontSize() to modify. Use ImGui::GetFontSize() to obtain scaled value.
+    float       FontSizeBase;               // Current base font size before external scaling factors are applied. Use PushFont(NULL, size) to modify. Use ImGui::GetFontSize() to obtain scaled value.
     float       FontScaleMain;              // Main scale factor. May be set by application once, or exposed to end-user.
     float       FontScaleDpi;               // Additional scale factor from viewport/monitor contents scale. When io.ConfigDpiScaleFonts is enabled, this is automatically overwritten when changing monitor DPI.
 

imgui_draw.cpp

@@ -5227,7 +5227,7 @@ ImFontBaked* ImFont::GetFontBaked(float size, float density)
     ImFontBaked* baked = LastBaked;
 
     // Round font size
-    // - ImGui::PushFontSize() will already round, but other paths calling GetFontBaked() directly also needs it (e.g. ImFontAtlasBuildPreloadAllGlyphRanges)
+    // - ImGui::PushFont() will already round, but other paths calling GetFontBaked() directly also needs it (e.g. ImFontAtlasBuildPreloadAllGlyphRanges)
     size = ImGui::GetRoundedFontSize(size);
 
     if (density < 0.0f)

imgui_internal.h

@@ -2143,7 +2143,7 @@ struct ImGuiContext
     ImFont*                 Font;                               // Currently bound font. (== FontStack.back().Font)
     ImFontBaked*            FontBaked;                          // Currently bound font at currently bound size. (== Font->GetFontBaked(FontSize))
     float                   FontSize;                           // Currently bound font size == line height (== FontSizeBase + externals scales applied in the UpdateCurrentFontSize() function).
-    float                   FontSizeBase;                       // Font size before scaling == style.FontSizeBase == value passed to PushFont() / PushFontSize() when specified.
+    float                   FontSizeBase;                       // Font size before scaling == style.FontSizeBase == value passed to PushFont() when specified.
     float                   FontBakedScale;                     // == FontBaked->Size / FontSize. Scale factor over baked size. Rarely used nowadays, very often == 1.0f.
     float                   FontRasterizerDensity;              // Current font density. Used by all calls to GetFontBaked().
     float                   CurrentDpiScale;                    // Current window/viewport DpiScale == CurrentViewport->DpiScale