imgui: Don't shrink fonts based on their line height

3rdparty/imgui/CHANGELOG.txt

@@ -1,6 +1,10 @@
 dear imgui
 CHANGELOG
 
+PCSX2 Changes (must be reapplied after each update, use git blame on this changelog to inspect the commit that originally applied the change):
+- Don't shrink fonts based on their line height, and allow PCSX2 to specify a line height
+  - Issue: https://github.com/ocornut/imgui/issues/9063
+
 This document holds the user-facing changelog that we also use in release notes.
 We generally fold multiple commits pertaining to the same topic as a single entry.
 Changes to backends are also included within the individual .cpp files of each backend.

3rdparty/imgui/include/imgui.h

@@ -3556,6 +3556,7 @@ struct ImFontConfig
     float           RasterizerMultiply;     // 1.0f     // Linearly brighten (>1.0f) or darken (<1.0f) font output. Brightening small fonts may be a good workaround to make them more readable. This is a silly thing we may remove in the future.
     float           RasterizerDensity;      // 1.0f     // [LEGACY: this only makes sense when ImGuiBackendFlags_RendererHasTextures is not supported] DPI scale multiplier for rasterization. Not altering other font metrics: makes it easy to swap between e.g. a 100% and a 400% fonts for a zooming display, or handle Retina screen. IMPORTANT: If you change this it is expected that you increase/decrease font scale roughly to the inverse of this, otherwise quality may look lowered.
     float           ExtraSizeScale;         // 1.0f     // Extra rasterizer scale over SizePixels.
+    float           LineHeight;             // 1.0f     // [PCSX2 Custom] The spacing between lines of the font, in ems.
 
     // [Internal]
     ImFontFlags     Flags;                  // Font flags (don't use just yet, will be exposed in upcoming 1.92.X updates)
@@ -3852,6 +3853,7 @@ struct ImFont
     ImFontAtlas*                OwnerAtlas;         // 4-8   // What we have been loaded into.
     ImFontFlags                 Flags;              // 4     // Font flags.
     float                       CurrentRasterizerDensity;    // Current rasterizer density. This is a varying state of the font.
+    float                       LineHeight;         // 4     // Line Height
 
     // [Internal] Members: Cold ~24-52 bytes
     // Conceptually Sources[] is the list of font sources merged to create this font.

3rdparty/imgui/src/imgui_draw.cpp

@@ -2425,6 +2425,7 @@ ImFontConfig::ImFontConfig()
     GlyphMaxAdvanceX = FLT_MAX;
     RasterizerMultiply = 1.0f;
     RasterizerDensity = 1.0f;
+    LineHeight = 1.0f;
     EllipsisChar = 0;
 }
 
@@ -3046,6 +3047,7 @@ ImFont* ImFontAtlas::AddFont(const ImFontConfig* font_cfg_in)
         font->Flags = font_cfg_in->Flags;
         font->LegacySize = font_cfg_in->SizePixels;
         font->CurrentRasterizerDensity = font_cfg_in->RasterizerDensity;
+        font->LineHeight = font_cfg_in->LineHeight;
         Fonts.push_back(font);
     }
     else
@@ -5612,8 +5614,8 @@ ImVec2 ImFontCalcTextSizeEx(ImFont* font, float size, float max_width, float wra
         text_end_display = text_end;
 
     ImFontBaked* baked = font->GetFontBaked(size);
-    const float line_height = size;
-    const float scale = line_height / baked->Size;
+    const float line_height = ImCeil(size * font->LineHeight);
+    const float scale = size / baked->Size;
 
     ImVec2 text_size = ImVec2(0, 0);
     float line_width = 0.0f;
@@ -5753,7 +5755,7 @@ begin:
     if (!text_end)
         text_end = text_begin + ImStrlen(text_begin); // ImGui:: functions generally already provides a valid text_end, so this is merely to handle direct calls.
 
-    const float line_height = size;
+    const float line_height = ImCeil(size * LineHeight);
     ImFontBaked* baked = GetFontBaked(size);
 
     const float scale = size / baked->Size;

3rdparty/imgui/src/imgui_freetype.cpp

@@ -439,7 +439,7 @@ static bool ImGui_ImplFreeType_FontBakedInit(ImFontAtlas* atlas, ImFontConfig* s
     // (FT_Set_Pixel_Sizes() essentially calls FT_Request_Size() with FT_SIZE_REQUEST_TYPE_NOMINAL)
     const float rasterizer_density = src->RasterizerDensity * baked->RasterizerDensity;
     FT_Size_RequestRec req;
-    req.type = (bd_font_data->UserFlags & ImGuiFreeTypeLoaderFlags_Bitmap) ? FT_SIZE_REQUEST_TYPE_NOMINAL : FT_SIZE_REQUEST_TYPE_REAL_DIM;
+    req.type = FT_SIZE_REQUEST_TYPE_NOMINAL;
     req.width = 0;
     req.height = (uint32_t)(size * 64 * rasterizer_density);
     req.horiResolution = 0;