Allow RGB JPEG files to be created/decoded when using the LJT colorspace extensions
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.2.x@809 632fc199-4ca6-4c93-a231-07263d6284db
diff --git a/jdcolext.c b/jdcolext.c
index 07da949..3b8aeff 100644
--- a/jdcolext.c
+++ b/jdcolext.c
@@ -102,3 +102,40 @@
}
}
}
+
+
+/*
+ * Convert RGB to extended RGB: just swap the order of source pixels
+ */
+
+INLINE
+LOCAL(void)
+rgb_rgb_convert_internal (j_decompress_ptr cinfo,
+ JSAMPIMAGE input_buf, JDIMENSION input_row,
+ JSAMPARRAY output_buf, int num_rows)
+{
+ register JSAMPROW inptr0, inptr1, inptr2;
+ register JSAMPROW outptr;
+ register JDIMENSION col;
+ JDIMENSION num_cols = cinfo->output_width;
+
+ while (--num_rows >= 0) {
+ inptr0 = input_buf[0][input_row];
+ inptr1 = input_buf[1][input_row];
+ inptr2 = input_buf[2][input_row];
+ input_row++;
+ outptr = *output_buf++;
+ for (col = 0; col < num_cols; col++) {
+ /* We can dispense with GETJSAMPLE() here */
+ outptr[RGB_RED] = inptr0[col];
+ outptr[RGB_GREEN] = inptr1[col];
+ outptr[RGB_BLUE] = inptr2[col];
+ /* Set unused byte to 0xFF so it can be interpreted as an opaque */
+ /* alpha channel value */
+#ifdef RGB_ALPHA
+ outptr[RGB_ALPHA] = 0xFF;
+#endif
+ outptr += RGB_PIXELSIZE;
+ }
+ }
+}