[chore] EVERYTHING!

fonts/pixel_font.cpp

@@ -1,12 +1,28 @@
-#include <fonts/sylva_sd.h>
+#include <fonts/hankaku.h>
 #include <fonts/pixel_font.h>
 #include <graphics/draw.h>
 #include <common.h>
 
+static unsigned int pf_x = 0;
+static unsigned int pf_y = 1;
+
+void pf_reset_position(void) {
+    // 其实应该还要清一下屏，后面思考一个安全的做法
+    pf_x = 0;
+    pf_y = 1;
+}
+
 void pf_print_char(char c, unsigned int basex, unsigned int basey, EFI_GRAPHICS_OUTPUT_BLT_PIXEL color) {
     for (unsigned int y = 0; y < 16; y++) {
         unsigned char data = hankaku_pixels[c][y];
         for (int x = 7; x >= 0; x--) {
+            // 解码Hankaku字体
+            /*
+            既然都在这了，就讲一下Hankaku字体是如何解码的
+            比如一个
+            {0x00, 0x82, 0x82, 0x44, 0x44, 0x44, 0x28, 0x28, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x00}
+            每一个Hex代表一行，比如0x82就是一行，转换成Bin得到10000010，1代表有像素，0代表没像素
+            */
             unsigned int current = data & 1;
             data >>= 1;
             if (current)
@@ -15,8 +31,27 @@ void pf_print_char(char c, unsigned int basex, unsigned int basey, EFI_GRAPHICS_
     }
 }
 
-void pf_print(char* text, unsigned int basex, unsigned int basey, EFI_GRAPHICS_OUTPUT_BLT_PIXEL color) {
+void pf_print(const char* text, EFI_GRAPHICS_OUTPUT_BLT_PIXEL color) {
     for (unsigned int i = 0; i < strlen(text); i++) {
-        pf_print_char(text[i], basex + 9 * i, basey, color);
+        char c = text[i];
+        if (c == '\n') {
+            pf_x = 0;
+            pf_y++;
+            if ((pf_y - 1) * 16 >= g_gfx.vr) {
+                gfx_clear();
+                pf_y = 1;
+            }
+            continue;
+        }
+        if (pf_x * 9 + 9 > g_gfx.hr) {
+            pf_x = 0;
+            pf_y++;
+            if ((pf_y - 1) * 16 >= g_gfx.vr) {
+                gfx_clear();
+                pf_y = 1;
+            }
+        }
+        pf_print_char(c, pf_x * 9, (pf_y - 1) * 16, color);
+        pf_x++;
     }
 }