From f0cd69968e5667b5ab1d00a3a78a54c6f8cffd5d Mon Sep 17 00:00:00 2001
From: Fritz Elfert <felfert@to.com>
Date: Sun, 3 Mar 2002 23:49:27 +0000
Subject:  - Added bitmap conversion functions.  - Updated printer class
 according to Protocol doc 1.15

---
 lib/psibitmap.h | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 lib/psibitmap.h

(limited to 'lib/psibitmap.h')

diff --git a/lib/psibitmap.h b/lib/psibitmap.h
new file mode 100644
index 0000000..14383f8
--- /dev/null
+++ b/lib/psibitmap.h
@@ -0,0 +1,75 @@
+/*-*-c++-*-
+ * $Id$
+ *
+ * This file is part of plptools.
+ *
+ *  Copyright (C) 1999-2001 Fritz Elfert <felfert@to.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#ifndef _PSIBITMAP_H_
+#define _PSIBITMAP_H_
+
+#include <bufferstore.h>
+
+/**
+ * This function is used by encodeBitmap for retrieving image data.
+ * It must return a gray value between 0 and 255 where 0 is black and
+ * 255 is white.
+ *
+ * @param x The x coordinate of the pixel to get (0 = left)
+ * @param y The y coordinate of the pixel to get (0 = top)
+ */
+typedef int (*getPixelFunction_t)(int x, int y);
+
+/**
+ * Convert an image into a bitmap in Psion format.
+ *
+ * @param width    The width of the image to convert.
+ * @param height   The height of the image to convert.
+ * @param getPixel Pointer to a function for retrieving pixel values.
+ * @param rle      Flag: Perform RLE compression (currently ignored).
+ * @param out      Output buffer; gets filled with the Psion representation
+ *                 of the converted image.
+ */
+extern void
+encodeBitmap(int width, int height, getPixelFunction_t getPixel,
+	     bool rle, bufferStore &out);
+
+/**
+ * Convert a Psion bitmap to a 8bit/pixel grayscale image.
+ *
+ * @param p Pointer to an input buffer which contains the Psion-formatted
+ *          bitmap to convert. Must start with a Psion bitmap header.
+ * @param width  On return, the image width in pixels is returned here.
+ * @param height On return, the image height in pixels is returned here.
+ * @param out    Buffer which gets filled with the raw image data. Each pixel
+ *               is represented by a byte. The image data is organized in
+ *               height scanlines of width bytes, starting with the topmost
+ *               scanline.
+ *
+ * @returns      true on success, false if input data is inconsistent.
+ */
+extern bool
+decodeBitmap(const unsigned char *p, int &width, int &height, bufferStore &out);
+
+#endif // !_PSIBITMAP_H_
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * End:
+ */
-- 
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