From 5ad541c5ec6b4c5f19bf1938a2c1a9bd7dce79d2 Mon Sep 17 00:00:00 2001
From: KrahJohlito <krahjohlito@outlook.com>
Date: Fri, 15 Nov 2024 14:28:16 +1030
Subject: [PATCH] fonts: add per font sizing for themes - cfg entry example:
 default_font=myDefaultFont.ttf default_font_size=20

font1=mySmallerFont.ttf
font1_size=12

main3:
 type=ItemsList
 font=0
main4:
 type=ItemText
 font=1
---
 include/fntsys.h |  4 +++-
 src/fntsys.c     | 25 ++++++++++++++-----------
 src/themes.c     | 12 +++++++++++-
 3 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/include/fntsys.h b/include/fntsys.h
index ea58879aa..2706fe30d 100644
--- a/include/fntsys.h
+++ b/include/fntsys.h
@@ -6,6 +6,8 @@
 /// Value returned on errors
 #define FNT_ERROR   (-1)
 
+#define FNTSYS_DEFAULT_SIZE 17
+
 /** Initializes the font subsystem */
 void fntInit();
 
@@ -15,7 +17,7 @@ void fntEnd();
 /** Loads a font from a file path
  * @param path The path to the font file
  * @return font slot id (negative value means error happened) */
-int fntLoadFile(char *path);
+int fntLoadFile(char *path, int fontSize);
 
 /** Reloads the default font */
 int fntLoadDefault(char *path);
diff --git a/src/fntsys.c b/src/fntsys.c
index 0e55a10c3..35f50f10d 100644
--- a/src/fntsys.c
+++ b/src/fntsys.c
@@ -27,8 +27,6 @@ extern int size_poeveticanew_raw;
 /// Atlas height in pixels
 #define ATLAS_HEIGHT 256
 
-#define FNTSYS_CHAR_SIZE 17
-
 // freetype vars
 static FT_Library font_library;
 
@@ -76,6 +74,8 @@ typedef struct
     /// Nonzero if font is used
     int isValid;
 
+    int fontSize;
+
     /// Texture atlases (default to NULL)
     atlas_t *atlases[ATLAS_MAX];
 
@@ -200,6 +200,7 @@ static void fntInitSlot(font_t *font)
     font->cacheMaxPageID = -1;
     font->dataPtr = NULL;
     font->isValid = 0;
+    font->fontSize = 0;
 
     int aid = 0;
     for (; aid < ATLAS_MAX; ++aid)
@@ -220,6 +221,7 @@ static void fntDeleteSlot(font_t *font)
     }
 
     font->isValid = 0;
+    font->fontSize = 0;
 }
 
 void fntRelease(int id)
@@ -228,7 +230,7 @@ void fntRelease(int id)
         fntDeleteSlot(&fonts[id]);
 }
 
-static int fntLoadSlot(font_t *font, char *path)
+static int fntLoadSlot(font_t *font, char *path, int fontSize)
 {
     void *buffer = NULL;
     int bufferSize = -1;
@@ -256,6 +258,7 @@ static int fntLoadSlot(font_t *font, char *path)
     }
 
     font->isValid = 1;
+    font->fontSize = fontSize;
     fntUpdateAspectRatio();
 
     return 0;
@@ -285,14 +288,14 @@ void fntInit()
     fntLoadDefault(NULL);
 }
 
-int fntLoadFile(char *path)
+int fntLoadFile(char *path, int fontSize)
 {
     font_t *font;
     int i = 1;
     for (; i < FNT_MAX_COUNT; i++) {
         font = &fonts[i];
         if (!font->isValid) {
-            if (fntLoadSlot(font, path) != FNT_ERROR)
+            if (fntLoadSlot(font, path, fontSize) != FNT_ERROR)
                 return i;
             break;
         }
@@ -305,7 +308,7 @@ int fntLoadDefault(char *path)
 {
     font_t newFont, oldFont;
 
-    if (fntLoadSlot(&newFont, path) != FNT_ERROR) {
+    if (fntLoadSlot(&newFont, path, FNTSYS_DEFAULT_SIZE) != FNT_ERROR) {
         // copy over the new font definition
         // we have to lock this phase, as the old font may still be used
         // Note: No check for concurrency is done here, which is kinda funky!
@@ -454,7 +457,7 @@ void fntUpdateAspectRatio()
         if (fonts[i].isValid) {
             fntCacheFlush(&fonts[i]);
             // TODO: this seems correct, but the rest of the OPL UI (i.e. spacers) doesn't seem to be correctly scaled.
-            FT_Set_Char_Size(fonts[i].face, FNTSYS_CHAR_SIZE * 64, FNTSYS_CHAR_SIZE * 64, fDPI * ws, fDPI * hs);
+            FT_Set_Char_Size(fonts[i].face, fonts[i].fontSize * 64, fonts[i].fontSize * 64, fDPI * ws, fDPI * hs);
         }
     }
 }
@@ -518,9 +521,9 @@ int fntRenderString(int id, int x, int y, short aligned, size_t width, size_t he
     }
 
     if (aligned & ALIGN_VCENTER) {
-        y += rmScaleY(FNTSYS_CHAR_SIZE - 4) >> 1;
+        y += rmScaleY(fonts[id].fontSize - 4) >> 1;
     } else {
-        y += rmScaleY(FNTSYS_CHAR_SIZE - 2);
+        y += rmScaleY(fonts[id].fontSize - 2);
     }
 
     quad.color = colour;
@@ -644,9 +647,9 @@ int fntRenderString(int id, int x, int y, short aligned, size_t width, size_t he
     }
 
     if (aligned & ALIGN_VCENTER) {
-        y += rmScaleY(FNTSYS_CHAR_SIZE - 4) >> 1;
+        y += rmScaleY(fonts[id].fontSize - 4) >> 1;
     } else {
-        y += rmScaleY(FNTSYS_CHAR_SIZE - 2);
+        y += rmScaleY(fonts[id].fontSize - 2);
     }
 
     quad.color = colour;
diff --git a/src/themes.c b/src/themes.c
index f3ccdb4f1..338dcb1c7 100644
--- a/src/themes.c
+++ b/src/themes.c
@@ -1224,8 +1224,18 @@ static void thmLoadFonts(config_set_t *themeConfig, const char *themePath, theme
         const char *fntFile;
         if (configGetStr(themeConfig, fntKey, &fntFile)) {
             snprintf(fullPath, sizeof(fullPath), "%s%s", themePath, fntFile);
-            int fntHandle = fntLoadFile(fullPath);
 
+            int fontSize;
+            char sizeKey[64];
+            if (fntID == 0)
+                snprintf(sizeKey, sizeof(sizeKey), "default_font_size");
+            else
+                snprintf(sizeKey, sizeof(sizeKey), "font%d_size", fntID);
+
+            if (!configGetInt(themeConfig, sizeKey, &fontSize) || fontSize <= 0)
+                fontSize = FNTSYS_DEFAULT_SIZE;
+
+            int fntHandle = fntLoadFile(fullPath, fontSize);
             // Do we have a valid font? Assign the font handle to the theme font slot
             if (fntHandle != FNT_ERROR)
                 theme->fonts[fntID] = fntHandle;