From fde8a1ab65d5e33d90123a3aaa9b5c15e249689f Mon Sep 17 00:00:00 2001
From: Loic Guegan <manzerbredes@mailbox.org>
Date: Thu, 29 Apr 2021 08:49:41 +0200
Subject: Debug, add memory print driver

---
 src/drivers/psftext.cc | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 src/drivers/psftext.cc

(limited to 'src/drivers/psftext.cc')

diff --git a/src/drivers/psftext.cc b/src/drivers/psftext.cc
new file mode 100644
index 0000000..da7e8c9
--- /dev/null
+++ b/src/drivers/psftext.cc
@@ -0,0 +1,66 @@
+#include "psftext.hpp"
+#include "core/paging.hpp"
+#include "libs/string.hpp"
+#include "drivers/framebuffer.hpp"
+
+PSF_STATUS psf_status;
+
+void psftext_init(void* psf_addr){
+    printk("Loading PSF font... ");
+    memcpy(psf_addr, &psf_status.header, sizeof(PSF_HEADER));
+    if(psf_status.header.magic!=PSF_MAGIC){
+        printk("Invalid PSF magic number. Abort.\n");
+        return;
+    }
+
+    printk("Flags %d Version %d Glyphs number %d Size %dx%d", 
+    psf_status.header.flags, psf_status.header.version,
+    psf_status.header.glyph_count, psf_status.header.glyph_width, psf_status.header.glyph_height);
+    psf_status.x=0;
+    psf_status.y=0;
+    psf_status.psf_addr=(u8*)psf_addr;
+    psf_status.nline=fb_cfg.height/psf_status.header.glyph_height;
+    psf_status.nchar=fb_cfg.width/psf_status.header.glyph_width;
+    psf_status.bg=0;
+    psf_status.fg=200;
+    print("\n");
+}
+
+void psftext_putchar(char c){
+    if(c=='\n'){
+        psf_status.y++;
+        psf_status.x=0;
+        if(psf_status.y>psf_status.nline)
+            framebuffer_scrollup(psf_status.header.glyph_height);
+        return;
+    }
+
+    u8* glyph=(psf_status.psf_addr+psf_status.header.header_length+c*psf_status.header.glyph_size);
+    FB_PIXEL pixel;
+    for(int i=0;i<psf_status.header.glyph_height;i++){
+        for(int k=0;k<(psf_status.header.glyph_width/8);k++){
+            u8 mask=1<<7;
+            u8 row=*(glyph+k);
+            for(int j=0;j<8;j++){
+                u16 status=row&mask;
+                u8 color=status ? psf_status.fg:psf_status.bg;
+                pixel.x=j+k*8+psf_status.x*psf_status.header.glyph_width;
+                pixel.y=i+psf_status.y*psf_status.header.glyph_height;
+                pixel.r=color;
+                pixel.g=color;
+                pixel.b=color;
+                pixel.a=color;
+                framebuffer_draw(pixel);
+                mask>>=1;
+            }
+        }
+        glyph+=psf_status.header.glyph_width/8;
+    }
+    psf_status.x++;
+    if(psf_status.x>psf_status.nchar){
+        psf_status.y++;
+        psf_status.x=0;
+        if(psf_status.y>psf_status.nline)
+            framebuffer_scrollup(psf_status.header.glyph_height);
+    }
+}
\ No newline at end of file
-- 
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