add LoadFontGraphicsData to Rom

src/app/rom.cc

@@ -126,6 +126,66 @@ absl::Status Rom::LoadAllGraphicsData() {
   return absl::OkStatus();
 }
 
+absl::Status Rom::LoadFontGraphicsData() {
+  std::vector<uint8_t> data(0x2000);
+  for (int i = 0; i < 0x2000; i++) {
+    data[i] = rom_data_[core::gfx_font + i];
+  }
+
+  // NEED TO GET THE APPROPRIATE SIZE FOR THAT
+  std::vector<uint8_t> new_data(0x2000);
+  std::vector<uint8_t> mask = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
+  int sheet_position = 0;
+
+  // 8x8 tile
+  for (int s = 0; s < 4; s++)  // Per Sheet
+  {
+    for (int j = 0; j < 4; j++)  // Per Tile Line Y
+    {
+      for (int i = 0; i < 16; i++)  // Per Tile Line X
+      {
+        for (int y = 0; y < 8; y++)  // Per Pixel Line
+        {
+          auto position = (y * 2) + (i * 16) + (j * 256) + sheet_position;
+          uint8_t line_bits0 = data[position];
+          uint8_t line_bits1 = data[position + 1];
+
+          for (int x = 0; x < 4; x++)  // Per Pixel X
+          {
+            uint8_t pixdata = 0;
+            uint8_t pixdata2 = 0;
+
+            if ((line_bits0 & mask[(x * 2)]) == mask[(x * 2)]) {
+              pixdata += 1;
+            }
+            if ((line_bits1 & mask[(x * 2)]) == mask[(x * 2)]) {
+              pixdata += 2;
+            }
+
+            if ((line_bits0 & mask[(x * 2) + 1]) == mask[(x * 2) + 1]) {
+              pixdata2 += 1;
+            }
+            if ((line_bits1 & mask[(x * 2) + 1]) == mask[(x * 2) + 1]) {
+              pixdata2 += 2;
+            }
+
+            new_data[(y * 64) + (x) + (i * 4) + (j * 512) + (s * 2048)] =
+                (uint8_t)((pixdata << 4) | pixdata2);
+          }
+        }
+      }
+    }
+
+    sheet_position += 0x400;
+  }
+
+  for (int i = 0; i < 0x4000; i++) {
+    font_gfx_data_[i] = new_data[i];
+  }
+
+  return absl::OkStatus();
+}
+
 absl::Status Rom::LoadFromFile(const std::string& filename, bool z3_load) {
   std::string full_filename = std::filesystem::absolute(filename).string();
   if (full_filename.empty()) {