Created base template for ImGUI application.

src/client/utils/setupFonts.nim

@@ -0,0 +1,76 @@
+import os, strformat
+import imguin/[cimgui, simple]
+
+import ./globals
+import ../utils/fonticon/IconsFontAwesome6
+export IconsFontAwesome6
+
+let IconfontFullPath = fmt"{CONQUEST_ROOT}/src/client/utils/fonticon/fa6/fa-solid-900.ttf"
+
+# Convert point to pixel
+proc point2px*(point: float32): cfloat = ((point * 96) / 72).cfloat
+
+# setupFonts
+type
+    TFontInfo = object
+        fontDir, osRootDir: string
+        fontTable: seq[(string, string, float)] # path, name, point
+
+when defined(windows):
+    const
+        fontInfo = TFontInfo(
+            osRootDir: os.getEnv("windir"), # get OS root
+            fontDir: "fonts",
+            fontTable: @[ #
+                ("segoeui.ttf", "Seoge UI", 14.4), 
+            ]
+        )
+else: # For Debian/Ubuntu/Mint
+    const
+        fontInfo = TFontInfo(
+            osRootDir: "/",
+            fontDir: "usr/share/fonts",
+            fontTable: @[
+                ("truetype/noto/NotoSansMono-Regular.ttf", "Noto Sans Mono", 20.0) 
+            ]
+        )
+
+proc new_ImFontConfig(): ImFontConfig =
+    # Custom constructor with default params taken from imgui.h
+    result.FontDataOwnedByAtlas = true
+    result.FontNo = 0
+    result.OversampleH = 3
+    result.OversampleV = 1
+    result.PixelSnapH = false
+    result.GlyphMaxAdvanceX = float.high
+    result.RasterizerMultiply = 1.0
+    result.RasterizerDensity = 1.0
+    result.MergeMode = false
+    result.EllipsisChar = cast[ImWchar](-1)
+
+proc setupFonts*(): (bool, string, string) =
+    let pio = igGetIO()
+    var config {.global.} = new_ImFontConfig()
+
+    # Load first base font
+    result = (false, "Default", "ProggyClean.ttf")
+    var seqFontNames: seq[(string, string)]
+    for (fontName, fontTitle, point) in fontInfo.fontTable:
+        let fontFullPath = os.joinPath(fontInfo.osRootDir, fontInfo.fontDir, fontName)
+        if os.fileExists(fontFullPath):
+            seqFontNames.add((fontName, fontTitle))
+            pio.Fonts.ImFontAtlas_AddFontFromFileTTF(fontFullPath.cstring, point.point2px, nil, nil)
+            break
+    
+    if seqFontNames.len > 0:
+        result = (true, seqFontNames[0][0].extractFilename, seqFontNames[0][1])
+    else:
+        pio.Fonts.ImFontAtlas_AddFontDefault(nil)
+
+    # Merge Icon font
+    config.MergeMode = true
+    var ranges_icon_fonts {.global.} = [ICON_MIN_FA.uint16, ICON_MAX_FA.uint16, 0]
+    if os.fileExists(IconfontFullPath):
+        pio.Fonts.ImFontAtlas_AddFontFromFileTTF(IconfontFullPath.cstring, 11.point2px, addr config, addr ranges_icon_fonts[0])
+    else:
+        echo "Error!: Can't find Icon fonts: ", IconfontFullPath