data/brushes/vine.gih new files, a sample hose and a sample pixmap brush

* data/brushes/vine.gih
        * data/brushes/pepper.gpb: new files, a sample hose
        and a sample pixmap brush

        * docs/gpb.txt
        * docs/gih.txt: vague description of the current pixmap
        brush and hose formats

        * app/gimpbrushhose.c
        * app/gimpbrushpicmap.c: use the brush spacing info now

ChangeLog

@@ -1,3 +1,16 @@
+Thu Aug 19 00:18:32 1999 Adrian Likins <alikins@redhat.com>
+	
+	* data/brushes/vine.gih
+	* data/brushes/pepper.gpb: new files, a sample hose
+	and a sample pixmap brush
+
+	* docs/gpb.txt
+	* docs/gih.txt: vague description of the current pixmap
+	brush and hose formats
+
+	* app/gimpbrushhose.c
+	* app/gimpbrushpicmap.c: use the brush spacing info now
+
 Wed Aug 18 22:49:31 1999 Adrian Likins <alikins@redhat.com>
 	
 	* app/apptypes.h: add GradientPaintMode enum

app/gimpbrushhose.c

@@ -194,6 +194,13 @@ gimp_brush_hose_load (char *file_name)
 						  header.height,
 						  header.bytes,
 						  0, 0, NULL);
+
+	  GIMP_BRUSH(brush)->spacing = header.spacing;
+	  /* set up spacing axis */
+	  GIMP_BRUSH(brush)->x_axis.x = header.width  / 2.0;
+	  GIMP_BRUSH(brush)->x_axis.y = 0.0;
+	  GIMP_BRUSH(brush)->y_axis.x = 0.0;
+	  GIMP_BRUSH(brush)->y_axis.y = header.height / 2.0;
 	  /*  Read the brush mask data  */
 	  
 	  if ((fread (temp_buf_data (GIMP_BRUSH(brush)->mask),

app/gimpbrushpixmap.c

@@ -153,8 +153,13 @@ gimp_brush_pixmap_load (char *file_name)
        /*  Get a new brush mask  */
        GIMP_BRUSH(brush)->mask = temp_buf_new (header.width, header.height, header.bytes,
 					       0, 0, NULL);
-       /*  Read the brush mask data  */
-  
+           GIMP_BRUSH(brush)->spacing = header.spacing;
+     /* set up spacing axis */
+	   GIMP_BRUSH(brush)->x_axis.x = header.width  / 2.0;
+	   GIMP_BRUSH(brush)->x_axis.y = 0.0;
+	   GIMP_BRUSH(brush)->y_axis.x = 0.0;
+	   GIMP_BRUSH(brush)->y_axis.y = header.height / 2.0;
+	   /*  Read the brush mask data  */
        if ((fread (temp_buf_data (GIMP_BRUSH(brush)->mask), 1, header.width * header.height,
 		   fp)) <	 header.width * header.height)
        g_message ("GIMP brush file appears to be truncated.");

docs/gih.txt

@@ -0,0 +1,53 @@
+Gimp I* Hose Format
+
+	The gih format is use to store a series of pixmap brushes,
+and some extra info for how to use them. 
+
+Basically, the format is real simple. It is a text header, followed
+by a series of gpb files, all concatenated together.
+
+The header format
+================
+
+First line is the name of the hose.
+Second line is the number of brushes in file
+
+ie
+===========================
+Fire
+6
+===========================
+
+The rest is just gpb files catted in.
+
+Making a gih file:
+
+	1. Create a series of gpb files. Note these do not
+	need to be the same size.
+
+	2. Create a text header like above.
+
+	3. Combine them all together:
+
+		cat header brush1.gpb brush2.gpb brush3.gpb > foo.gih
+
+
+Thats about it for now.
+
+
+Other bits:
+==========
+
+The spacing for the hose is currently based on the spacing
+for the last brush in the hose. 
+
+WARNING:
+=======
+
+The header file format, and possible the entire file format
+is likely to change.
+
+
+Adrian Likins
+aug 18, 1999
+

docs/gpb.txt

@@ -0,0 +1,64 @@
+Gimp Pixmap Brush File Format
+
+The current format for gpb files, the pixmap
+bnrush format is very simple. What it essentially
+boils down to is a greyscale gbr (gimp brush) and
+a rgb pat (gimp pattern) concatented into the same file.
+
+The gbr is first, and is used for the greyscale mask for
+the brush. The pat is second and is used for the rgb info in
+the file.
+
+The name and spacing info for the greyscale portion
+is used for the name and spacing of the pixmap
+brush.
+
+The greyscale mask and the rgb data need to be of
+the same height and width.
+
+At the time of writing this, there isnt a gpb file
+loader or saver plugin, so the easiest way to
+create gpb's is:
+
+	1. Create a rgb image of some sort. The best
+	images seem to be something on a black background,
+	but thats not required. 
+
+	2. Generate a mask for all the parts of the image
+	that should be transparent in the final product. There
+	are several ways to do this but quickmask, or select
+	by color, selection to channel seem to be a good way to 
+	do it. This mask needs to be greyscale. So I usually
+	make it a selection, and then use "save selection 
+	as channel"
+
+	3. Take that mask, select all, and cut it. Then
+	open a new greyscale image, and paste it into the
+	image. This is the easiest way to insure the images
+	are the same size and are aligned. The white portions
+	of this image will be what is opaque in the pixmap
+	brush.
+	
+	 Take the above mask, and save it as a .gbr file. 
+	It doesnt need to be in the brushes dir.
+
+	5. Take the original rgb image, remove any mask layers,
+	and flatten the image. Setting background color to black
+	and flattening to a black background seems to work
+	a little better. 
+
+	Take this image, and save it as a .pat file. This does
+	not need to be in the patterns directory.
+
+	6. Go to a shell, and concatenate the files together
+	into a .gpb. Ie, for a mask named foo.gbr, and a
+	rgb pat name foo.pat:
+
+		cat foo.gbr foo.pat > foo.gpb
+
+	7. Copy that foo.gpb to your brushes dir
+
+
+Adrian Likins
+aug 18, 1999
+