---
src/stkutil.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
src/stkutil.h | 1 +
2 files changed, 109 insertions(+), 0 deletions(-)
diff --git a/src/stkutil.c b/src/stkutil.c
index 9cac850..dfac661 100644
--- a/src/stkutil.c
+++ b/src/stkutil.c
@@ -26,6 +26,7 @@
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
+#include <stdio.h>
#include <glib.h>
@@ -6076,3 +6077,110 @@ char *stk_text_to_html(const char *utf8,
/* return characters from string. Caller must free char data */
return g_string_free(string, FALSE);
}
+
+char *stk_image_to_xpm(const unsigned char *img, guint8 scheme)
+{
+ guint8 width, height;
+ int ncolors, nbits, bit, entry, cpp;
+ int i, j, k;
+ short clut_offset = 0;
+ guint8 *clut;
+ GString *xpm;
+ int pos = 0;
+ const char xpm_header[] = "/* XPM */\n";
+ const char declaration[] = "static char *xpm[] = {\n";
+ char temp[17];
+
+ if (img == NULL)
+ return NULL;
+
+ width = img[pos++];
+ height = img[pos++];
+
+ if (scheme == 0x11) {
+ nbits = 1;
+ ncolors = 2;
+ } else {
+ nbits = img[pos++];
+ ncolors = img[pos++];
+
+ /* the value of zero should be interpreted as 256 */
+ if (ncolors == 0)
+ ncolors = 256;
+
+ clut_offset = img[pos++] << 8;
+ clut_offset |= img[pos++];
+ }
+
+ /* determine the number of chars need to represent the pixel */
+ sprintf(temp, "%d", ncolors);
+ cpp = strlen(temp);
+
+ /* create values line */
+ sprintf(temp, "\"%d %d %d %d\",\n", width, height, ncolors, cpp);
+
+ /*
+ * space needed:
+ * header line
+ * declaration and beginning of assignment line
+ * values - strlen(values)
+ * colors - ncolors * (cpp + whitespace + deliminators + color)
+ * pixels - width * height * cpp + height deliminators "",\n
+ * end of assignment - 2 chars "};"
+ */
+ xpm = g_string_sized_new(strlen(xpm_header) + strlen(declaration) +
+ strlen(temp) + ((cpp + 14) * ncolors) +
+ (width * height * cpp) + (4 * height) + 2);
+ if (xpm == NULL)
+ return NULL;
+
+ /* add header, declaration, values */
+ g_string_append(xpm, xpm_header);
+ g_string_append(xpm, declaration);
+ g_string_append(xpm, temp);
+
+ /* create colors */
+ if (scheme == 0x11) {
+ g_string_append(xpm, "\"0\tc #000000\",\n");
+ g_string_append(xpm, "\"1\tc #FFFFFF\",\n");
+ } else {
+ clut = (guint8 *) &img[clut_offset];
+
+ for (i = 0; i < ncolors; i++) {
+ if ((i == (ncolors - 1)) && (scheme == 0x22))
+ g_string_append_printf(xpm,
+ "\"%*d\tc None\",\n",
+ cpp, i);
+ else
+ g_string_append_printf(xpm,
+ "\"%*d\tc #%02hhX%02hhX%02hhX\",\n",
+ cpp, i, clut[0], clut[1], clut[2]);
+ clut += 3;
+ }
+ }
+
+ /* height rows of width pixels */
+ k = 7;
+ for (i = 0; i < height; i++) {
+ g_string_append(xpm, "\"");
+ for (j = 0; j < width; j++) {
+ entry = 0;
+ for (bit = nbits - 1; bit >= 0; bit--) {
+ entry |= (img[pos] >> k & 0x1) << bit;
+ k--;
+
+ /* see if we crossed a byte boundary */
+ if (k < 0) {
+ k = 7;
+ pos++;
+ }
+ }
+ g_string_append_printf(xpm, "%*d", cpp, entry);
+ }
+ g_string_append(xpm, "\",\n");
+ }
+ g_string_append(xpm, "};");
+
+ /* Caller must free char data */
+ return g_string_free(xpm, FALSE);
+}
diff --git a/src/stkutil.h b/src/stkutil.h
index 1fbd68b..56ed255 100644
--- a/src/stkutil.h
+++ b/src/stkutil.h
@@ -1644,3 +1644,4 @@ const unsigned char *stk_pdu_from_envelope(const struct
stk_envelope *envelope,
unsigned int *out_length);
char *stk_text_to_html(const char *text,
const unsigned short *attrs, int num_attrs);
+char *stk_image_to_xpm(const unsigned char *img, guint8 scheme);
--
1.6.6.1
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