separating: there will be libk and libc

2025-01-07 15:23:14 +01:00
parent b3687d20ee
commit a8582ba343
32 changed files with 29 additions and 31 deletions
--- a/drivers/framebuffer.c
+++ b/drivers/framebuffer.c
@@ -0,0 +1,131 @@
+// Framebuffer driver
+// Author: xamidev
+// Licensed under the Unlicense. See the repo below.
+// https://github.com/xamidev/blankos
+
+#include <stdint.h>
+#include "framebuffer.h"
+#include "serial.h"
+#include "../kernel/system.h"
+#include "../kernel/kheap.h"
+
+extern char* framebuffer;
+
+void psf_init()
+{
+	uint16_t glyph = 0;
+	PSF_font *font = (PSF_font*)&FONT_START;
+	if (font->flags)
+	{
+		unicode = NULL;
+		return;
+	}
+
+	char* s = (char*)((unsigned char*)&FONT_START + font->headersize + font->numglyph * font->bytesperglyph);
+	unicode = calloc(USHRT_MAX, 2);
+	
+	while((uintptr_t)s>(uintptr_t)FONT_END){
+        uint16_t uc = (uint16_t)((unsigned char)s[0]);
+        if(uc == 0xFF) {
+            glyph++;
+            s++;
+            continue;
+        } else if(uc & 128) {
+            /* UTF-8 to unicode */
+            if((uc & 32) == 0 ) {
+                uc = ((s[0] & 0x1F)<<6)+(s[1] & 0x3F);
+                s++;
+            } else
+            if((uc & 16) == 0 ) {
+                uc = ((((s[0] & 0xF)<<6)+(s[1] & 0x3F))<<6)+(s[2] & 0x3F);
+                s+=2;
+            } else
+            if((uc & 8) == 0 ) {
+                uc = ((((((s[0] & 0x7)<<6)+(s[1] & 0x3F))<<6)+(s[2] & 0x3F))<<6)+(s[3] & 0x3F);
+                s+=3;
+            } else
+                uc = 0;
+        }
+        /* save translation */
+        unicode[uc] = glyph;
+        s++;
+    }
+}
+
+void putpixel(uint32_t* fb, int pitch, int bpp, int x, int y, uint32_t color)
+{
+	uint32_t* pixel_addr = (uint32_t*)((uint8_t*)fb + y * pitch + x *(bpp / 8));
+	*pixel_addr = color;
+}
+
+void draw_char(unsigned short int c, int cx, int cy, uint32_t fg, uint32_t bg)
+{
+	PSF_font *font = (PSF_font*)&FONT_START;
+	int bytesperline=(font->width+7)/8;
+	if (unicode != NULL) {
+		c = unicode[c];
+	}
+
+	unsigned char* glyph = (unsigned char*)&FONT_START + font->headersize + (c>0&&c<font->numglyph?c:0)*font->bytesperglyph;
+
+	int offs =
+		(cy * font->height * scanline) +
+		(cx * (font->width) * sizeof(PIXEL));
+
+	unsigned int x, y;
+	int line, mask;
+
+	for (y=0; y<font->height; y++)
+	{
+		line=offs;
+		mask=1<<(font->width-1);
+
+		for (x=0; x<font->width; x++)
+		{
+			*((PIXEL*)(framebuffer + line)) = *((unsigned int*)glyph) & mask ? fg : bg;
+			mask >>= 1;
+			line += sizeof(PIXEL);
+		}
+
+		glyph += bytesperline;
+		offs += scanline;
+	}
+}
+
+void scroll()
+{
+	serial_printf(3, "Scrolling...\r");
+	uint32_t bg_color = 0x00000000;
+	PSF_font *font = (PSF_font*)&FONT_START;
+	
+	int line_size = font->height * scanline;
+	int framebuffer_size = scanline * font->height * (1080/font->height);
+
+	// Erasing first line
+	for (uint32_t y=0; y<font->height; y++)
+	{
+		for (uint32_t x=0; x<scanline/sizeof(PIXEL); x++)
+		{
+			*((PIXEL*)(framebuffer + y * scanline + x * sizeof(PIXEL))) = bg_color;
+		}
+	}
+
+	// Moving all lines up by 1 line
+	for (int y=1; y<(framebuffer_size/line_size); y++)
+	{
+		void* src = framebuffer + y*line_size;
+		void* dst = framebuffer + (y-1)*line_size;
+		memmove(dst, src, line_size);
+	}
+
+	// Erasing last line
+	int last_line_start = (framebuffer_size/line_size-1) * line_size;
+	for (uint32_t y=0; y<font->height; y++)
+	{
+		for (uint32_t x=0; x<scanline/sizeof(PIXEL); x++)
+		{
+			*((PIXEL*)(framebuffer + last_line_start + y * scanline + x * sizeof(PIXEL))) = bg_color;
+		}
+	}
+}
+