From ac6ef66cc8f60ecc9d7ee8691bf7a73fcc24f4b7 Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Sun, 16 Feb 2025 21:13:58 -0500
Subject: renderer: set font size functions on init

---
 main.c     | 21 +--------------------
 renderer.c | 47 ++++++++++++++++++++++++++++++-----------------
 renderer.h |  2 +-
 3 files changed, 32 insertions(+), 38 deletions(-)

diff --git a/main.c b/main.c
index 1f57612..3a90419 100644
--- a/main.c
+++ b/main.c
@@ -36,8 +36,6 @@ static const mu_Color COLOR_SCROLLTHUMB = WHITE;
 /* Function declarations. */
 
 static void set_style(mu_Context *ctx);
-static int text_width(mu_Font font, const char *text, int len);
-static int text_height(mu_Font font);
 static void main_loop(mu_Context *ctx, UI *ui);
 static void process_frame(mu_Context *ctx, UI *ui);
 static void main_window(mu_Context *ctx, UI *ui);
@@ -47,14 +45,10 @@ static void main_window(mu_Context *ctx, UI *ui);
 
 int
 main(void) {
-	/* Init renderer. */
-	r_init();
-
 	/* Init microui. */
 	static mu_Context ctx;
 	mu_init(&ctx);
-	ctx.text_width = text_width;
-	ctx.text_height = text_height;
+	r_init(&ctx);
 	set_style(&ctx);
 
 	/* Init data structures. */
@@ -84,19 +78,6 @@ set_style(mu_Context *ctx) {
 	ctx->style->colors[MU_COLOR_SCROLLTHUMB] = COLOR_SCROLLTHUMB;
 }
 
-static int
-text_width(mu_Font font, const char *text, int len) {
-	if (len < 0) {
-		len = strlen(text);
-	}
-	return r_get_text_width(text, len);
-}
-
-static int
-text_height(mu_Font font) {
-	return r_get_text_height();
-}
-
 static void
 main_loop(mu_Context *ctx, UI *ui) {
 	for (;;) {
diff --git a/renderer.c b/renderer.c
index 4720ac0..5bbfbcb 100644
--- a/renderer.c
+++ b/renderer.c
@@ -12,6 +12,10 @@ enum window {
   HEIGHT = 600,
 };
 
+enum text {
+	TEXT_HEIGHT = 18,
+};
+
 static const mu_Color COLOR_BG = {0, 0, 0, 255};
 
 static const char button_map[256] = {
@@ -42,6 +46,27 @@ static int buf_idx;
 static SDL_Window *window;
 
 
+static int text_width(mu_Font font, const char *text, int len) {
+  if (len < 0) {
+    len = strlen(text);
+  }
+
+  int res = 0;
+  for (const char *p = text; *p && len--; p++) {
+    if ((*p & 0xc0) == 0x80) { continue; }
+    int chr = mu_min((unsigned char) *p, 127);
+    res += atlas[ATLAS_FONT + chr].w;
+  }
+  return res;
+}
+
+
+static int
+text_height(mu_Font font) {
+  return TEXT_HEIGHT;
+}
+
+
 static void flush(void) {
   if (buf_idx == 0) { return; }
 
@@ -211,7 +236,7 @@ static void render_command(mu_Command *cmd) {
 }
 
 
-void r_init(void) {
+void r_init(mu_Context *ctx) {
   /* init SDL window */
   SDL_Init(SDL_INIT_EVERYTHING);
   window = SDL_CreateWindow(
@@ -239,6 +264,10 @@ void r_init(void) {
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
   assert(glGetError() == 0);
+
+  /* init microui */
+  ctx->text_width = text_width;
+  ctx->text_height = text_height;
 }
 
 
@@ -266,22 +295,6 @@ void r_present(void) {
 }
 
 
-int r_get_text_width(const char *text, int len) {
-  int res = 0;
-  for (const char *p = text; *p && len--; p++) {
-    if ((*p & 0xc0) == 0x80) { continue; }
-    int chr = mu_min((unsigned char) *p, 127);
-    res += atlas[ATLAS_FONT + chr].w;
-  }
-  return res;
-}
-
-
-int r_get_text_height(void) {
-  return 18;
-}
-
-
 void r_get_window_size(int *w, int *h) {
   SDL_GetWindowSize(window, w, h);
 }
diff --git a/renderer.h b/renderer.h
index 759bfd6..7d52a8a 100644
--- a/renderer.h
+++ b/renderer.h
@@ -3,7 +3,7 @@
 
 #include "microui.h"
 
-void r_init(void);
+void r_init(mu_Context *ctx);
 void r_handle_input(mu_Context *ctx);
 void r_render(mu_Context *ctx);
 void r_present(void);
-- 
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