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diff --git a/common/readpng.c b/common/readpng.c
new file mode 100644
index 0000000..2a74668
--- /dev/null
+++ b/common/readpng.c
@@ -0,0 +1,144 @@
+#include <stdio.h>
+#include <string.h>
+#include <png.h>
+#include "readpng.h"
+#include "lprintf.h"
+
+void readpng(void *dest, const char *fname, readpng_what what)
+{
+	FILE *fp;
+	png_structp png_ptr = NULL;
+	png_infop info_ptr = NULL;
+	png_bytepp row_ptr = NULL;
+
+	if (dest == NULL || fname == NULL)
+	{
+		return;
+	}
+
+	fp = fopen(fname, "rb");
+	if (fp == NULL)
+	{
+		lprintf(__FILE__ ": failed to open: %s\n", fname);
+		return;
+	}
+
+	png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+	if (!png_ptr)
+	{
+		lprintf(__FILE__ ": png_create_read_struct() failed\n");
+		fclose(fp);
+		return;
+	}
+
+	info_ptr = png_create_info_struct(png_ptr);
+	if (!info_ptr)
+	{
+		lprintf(__FILE__ ": png_create_info_struct() failed\n");
+		goto done;
+	}
+
+	// Start reading
+	png_init_io(png_ptr, fp);
+	png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_STRIP_ALPHA | PNG_TRANSFORM_PACKING, NULL);
+	row_ptr = png_get_rows(png_ptr, info_ptr);
+	if (row_ptr == NULL)
+	{
+		lprintf(__FILE__ ": png_get_rows() failed\n");
+		goto done;
+	}
+
+	// lprintf("%s: %ix%i @ %ibpp\n", fname, (int)info_ptr->width, (int)info_ptr->height, info_ptr->pixel_depth);
+
+	switch (what)
+	{
+		case READPNG_BG:
+		{
+			int height, width, h;
+			unsigned short *dst = dest;
+			if (info_ptr->pixel_depth != 24)
+			{
+				lprintf(__FILE__ ": bg image uses %ibpp, needed 24bpp\n", info_ptr->pixel_depth);
+				break;
+			}
+			height = info_ptr->height;
+			if (height > 240) height = 240;
+			width = info_ptr->width;
+			if (width > 320) width = 320;
+
+			for (h = 0; h < height; h++)
+			{
+				unsigned char *src = row_ptr[h];
+				int len = width;
+				while (len--)
+				{
+					*dst++ = ((src[0]&0xf8)<<8) | ((src[1]&0xf8)<<3) | (src[2] >> 3);
+					src += 3;
+				}
+				dst += 320 - width;
+			}
+			break;
+		}
+
+		case READPNG_FONT:
+		{
+			int x, y, x1, y1;
+			unsigned char *dst = dest;
+			if (info_ptr->width != 128 || info_ptr->height != 160)
+			{
+				lprintf(__FILE__ ": unexpected font image size %ix%i, needed 128x160\n",
+					(int)info_ptr->width, (int)info_ptr->height);
+				break;
+			}
+			if (info_ptr->pixel_depth != 8)
+			{
+				lprintf(__FILE__ ": font image uses %ibpp, needed 8bpp\n", info_ptr->pixel_depth);
+				break;
+			}
+			for (y = 0; y < 16; y++)
+			{
+				for (x = 0; x < 16; x++)
+				{
+					for (y1 = 0; y1 < 10; y1++)
+					{
+						unsigned char *src = row_ptr[y*10 + y1] + x*8;
+						for (x1 = 8/2; x1 > 0; x1--, src+=2)
+							*dst++ = ((src[0]^0xff) & 0xf0) | ((src[1]^0xff) >> 4);
+					}
+				}
+			}
+			break;
+		}
+
+		case READPNG_SELECTOR:
+		{
+			int x1, y1;
+			unsigned char *dst = dest;
+			if (info_ptr->width != 8 || info_ptr->height != 10)
+			{
+				lprintf(__FILE__ ": unexpected selector image size %ix%i, needed 8x10\n",
+					(int)info_ptr->width, (int)info_ptr->height);
+				break;
+			}
+			if (info_ptr->pixel_depth != 8)
+			{
+				lprintf(__FILE__ ": selector image uses %ibpp, needed 8bpp\n", info_ptr->pixel_depth);
+				break;
+			}
+			for (y1 = 0; y1 < 10; y1++)
+			{
+				unsigned char *src = row_ptr[y1];
+				for (x1 = 8/2; x1 > 0; x1--, src+=2)
+					*dst++ = ((src[0]^0xff) & 0xf0) | ((src[1]^0xff) >> 4);
+			}
+			break;
+		}
+	}
+
+
+done:
+	png_destroy_read_struct(&png_ptr, info_ptr ? &info_ptr : NULL, (png_infopp)NULL);
+	fclose(fp);
+}
+
+