Basic font atlas loading

.gitignore

@@ -1,2 +1,3 @@
 obj/*
 raylib-ascii-render
+unscii-16-full.ttf

Makefile

@@ -1,10 +1,13 @@
 CFLAGS += 
-LDFLAGS := -lm
+LDFLAGS := -lraylib
 OBJECTS := 
 
 raylib-ascii-render: lib
 	$(CC) $(CFLAGS) $(OBJECTS) src/main.c $(LDFLAGS) -o raylib-ascii-render
 
+run: raylib-ascii-render
+	./raylib-ascii-render
+
 all: raylib-ascii-render
 
 lib: $(OBJECTS)

src/main.c

@@ -1,6 +1,41 @@
+// x-run: make -C.. run
+#include <raylib.h>
 #include <stdio.h>
-#include <math.h>
 
 int main(void) {
-  printf("Hi!\n");
+  InitWindow(320, 240, "Loading...");
+  SetTargetFPS(30);
+
+  int font_size = 16, chars_x = 80, chars_y = 24;
+
+  Font font = LoadFontEx("unscii-16-full.ttf", font_size, NULL, 256);
+  Vector2 glyphSize = MeasureTextEx(font, "A", font_size, 0);
+  Image img_atlas = GenImageColor(glyphSize.x * 16, glyphSize.y * 8, BLACK);
+
+  for (int sym = ' '; sym < '\x7f'; sym++) {
+    Vector2 pos = { (sym & 0xf) * glyphSize.x, (sym >> 4) * glyphSize.y };
+    ImageDrawTextEx(&img_atlas, font, TextFormat("%c", sym), pos, font_size, 0, WHITE);
+    GlyphInfo glyph = font.glyphs[GetGlyphIndex(font, sym)];
+    ImageDraw(&img_atlas, glyph.image, (Rectangle){
+      0, 0,
+      glyph.image.width, glyph.image.height
+    }, (Rectangle){
+      pos.x + glyph.offsetX, pos.y + glyph.offsetY,
+      glyph.image.width, glyph.image.height
+    }, WHITE);
+  }
+
+  Texture2D tex_atlas = LoadTextureFromImage(img_atlas);
+  SetWindowSize(chars_x * glyphSize.x, chars_y * glyphSize.y);
+
+  for (int frame = 0; !WindowShouldClose(); frame++) {
+    BeginDrawing();
+    ClearBackground(BLACK);
+    DrawTexture(tex_atlas, 0, 0, WHITE);
+    EndDrawing();
+  }
+
+  UnloadFont(font);
+  UnloadImage(img_atlas);
+  UnloadTexture(tex_atlas);
 }