--- /dev/null
+/*****************************************************************************/
+/* */
+/* geosicon.c */
+/* */
+/* GEOS icon format backend for the sp65 sprite and bitmap utility */
+/* */
+/* */
+/* */
+/* (C) 2012, Ullrich von Bassewitz */
+/* Roemerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
+
+
+
+/* common */
+#include "attrib.h"
+#include "print.h"
+
+/* sp65 */
+#include "attr.h"
+#include "error.h"
+#include "geosicon.h"
+
+
+
+/*****************************************************************************/
+/* Data */
+/*****************************************************************************/
+
+
+
+/* Screen size of geos icon */
+#define WIDTH 24U
+#define HEIGHT 21U
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+StrBuf* GenGeosIcon (const Bitmap* B, const Collection* A attribute ((unused)))
+/* Generate binary output in GEOS icon format for the bitmap B. The output
+ * is stored in a string buffer (which is actually a dynamic char array) and
+ * returned.
+ */
+{
+ StrBuf* D;
+ unsigned X, Y;
+
+
+ /* Output the image properties */
+ Print (stdout, 1, "Image is %ux%u with %u colors%s\n",
+ GetBitmapWidth (B), GetBitmapHeight (B), GetBitmapColors (B),
+ BitmapIsIndexed (B)? " (indexed)" : "");
+
+ /* Check the bitmap properties */
+ if (!BitmapIsIndexed (B) ||
+ GetBitmapHeight (B) != HEIGHT ||
+ GetBitmapWidth (B) != WIDTH ||
+ GetBitmapColors (B) > 2) {
+ Error ("Invalid bitmap properties for conversion to GEOS icon");
+ }
+
+ /* Create the output buffer and resize it to the required size. */
+ D = NewStrBuf ();
+ SB_Realloc (D, 63);
+
+ /* Convert the image */
+ for (Y = 0; Y < HEIGHT; ++Y) {
+ unsigned char V = 0;
+ for (X = 0; X < WIDTH; ++X) {
+
+ /* Fetch next bit into byte buffer */
+ V = (V << 1) | (GetPixel (B, X, Y).Index & 0x01);
+
+ /* Store full bytes into the output buffer */
+ if ((X & 0x07) == 0x07) {
+ SB_AppendChar (D, V);
+ V = 0;
+ }
+ }
+ }
+
+ /* Return the converted bitmap */
+ return D;
+}
+
+
+
--- /dev/null
+/*****************************************************************************/
+/* */
+/* geosicon.h */
+/* */
+/* GEOS icon format backend for the sp65 sprite and bitmap utility */
+/* */
+/* */
+/* */
+/* (C) 2012, Ullrich von Bassewitz */
+/* Roemerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
+
+
+
+#ifndef GEOSICON_H
+#define GEOSICON_H
+
+
+
+/* common */
+#include "coll.h"
+#include "strbuf.h"
+
+/* sp65 */
+#include "bitmap.h"
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+StrBuf* GenGeosIcon (const Bitmap* B, const Collection* A);
+/* Generate binary output in GEOS icon format for the bitmap B. The output
+ * is stored in a string buffer (which is actually a dynamic char array) and
+ * returned.
+ */
+
+
+
+/* End of geosicon.h */
+
+#endif
+
+
+