Documentation. Spelling fixes.

* gdk-pixdata.c, gdk-pixdata.h: Documentation.
        * gdk-pixbuf-csource.1: Spelling fixes.

gdk-pixbuf/gdk-pixdata.h

@@ -25,9 +25,33 @@
 extern "C" {
 #endif /* __cplusplus */
 
-
+/**
+ * GDK_PIXBUF_MAGIC_NUMBER:
+ *
+ * Magic number for #GdkPixdata structures.
+ **/
 #define GDK_PIXBUF_MAGIC_NUMBER (0x47646b50)    /* 'GdkP' */
 
+/**
+ * GdkPixdataType:
+ * @GDK_PIXDATA_COLOR_TYPE_RGB:  each pixel has red, green and blue samples.
+ * @GDK_PIXDATA_COLOR_TYPE_RGBA: each pixel has red, green and blue samples 
+ *    and an alpha value.
+ * @GDK_PIXDATA_COLOR_TYPE_MASK: mask for the colortype flags of the enum.
+ * @GDK_PIXDATA_SAMPLE_WIDTH_8: each sample has 8 bits.
+ * @GDK_PIXDATA_SAMPLE_WIDTH_MASK: mask for the sample width flags of the enum.
+ * @GDK_PIXDATA_ENCODING_RAW: the pixel data is in raw form. 
+ * @GDK_PIXDATA_ENCODING_RLE: the pixel data is run-length encoded. Runs may 
+ *    be up to 127 bytes long; their length is stored in a single byte 
+ *    preceding the pixel data for the run. If a run is constant, its length
+ *    byte has the high bit set and the pixel data consists of a single pixel
+ *    which must be repeated. 
+ * @GDK_PIXDATA_ENCODING_MASK: mask for the encoding flags of the enum.
+ *
+ * An enumeration containing three sets of flags for a #GdkPixdata struct: 
+ * one for the used colorspace, one for the width of the samples and one 
+ * for the encoding of the pixel data.  
+ **/
 typedef enum
 {
   /* colorspace + alpha */
@@ -43,6 +67,23 @@ typedef enum
   GDK_PIXDATA_ENCODING_MASK     = 0x0f << 24
 } GdkPixdataType;
 
+/**
+ * GdkPixdata:
+ * @magic: magic number. A valid #GdkPixdata structure must have 
+ *    #GDK_PIXBUF_MAGIC_NUMBER here.
+ * @length: less than 1 to disable length checks, otherwise 
+ *    #GDK_PIXDATA_HEADER_LENGTH + length of @pixel_data. 
+ * @pixdata_type: information about colorspace, sample width and 
+ *    encoding, in a #GdkPixdataType. 
+ * @rowstride: padding used in @pixel_data or 0 to indicate no padding.
+ * @width: the width.
+ * @height: the height.
+ * @pixel_data: @width x @height pixels, encoded according to @pixdata_type
+ *   and @rowstride.
+ *
+ * A #GdkPixdata contains pixbuf information in a form suitable for 
+ * serialization and streaming.
+ **/
 typedef struct _GdkPixdata GdkPixdata;
 struct _GdkPixdata
 {
@@ -56,6 +97,12 @@ struct _GdkPixdata
   guint32 height;
   guint8 *pixel_data;
 };
+
+/**
+ * GDK_PIXDATA_HEADER_LENGTH:
+ *
+ * The length of a #GdkPixdata structure without the @pixel_data pointer.
+ **/
 #define	GDK_PIXDATA_HEADER_LENGTH	(4 + 4 + 4 + 4 + 4 + 4)
 
 /* the returned stream is plain htonl of GdkPixdata members + pixel_data */
@@ -71,6 +118,34 @@ gpointer	gdk_pixdata_from_pixbuf	(GdkPixdata		*pixdata,
 GdkPixbuf*	gdk_pixbuf_from_pixdata	(const GdkPixdata	*pixdata,
 					 gboolean		 copy_pixels,
 					 GError		       **error);
+/** 
+ * GdkPixdataDumpType:
+ * @GDK_PIXDATA_DUMP_PIXDATA_STREAM: Generate pixbuf data stream (a single 
+ *    string containing a serialized #GdkPixdata structure in network byte 
+ *    order).
+ * @GDK_PIXDATA_DUMP_PIXDATA_STRUCT: Generate #GdkPixdata structure (needs 
+ *    the #GdkPixdata structure definition from gdk-pixdata.h).
+ * @GDK_PIXDATA_DUMP_MACROS: Generate <function>*_ROWSTRIDE</function>,     
+ *    <function>*_WIDTH</function>, <function>*_HEIGHT</function>,
+ *    <function>*_BYTES_PER_PIXEL</function> and 
+ *    <function>*_RLE_PIXEL_DATA</function> or <function>*_PIXEL_DATA</function>
+ *    macro definitions for the image.
+ * @GDK_PIXDATA_DUMP_GTYPES: Generate GLib data types instead of 
+ *    standard C data types.
+ * @GDK_PIXDATA_DUMP_CTYPES: Generate standard C data types instead of 
+ *    GLib data types.
+ * @GDK_PIXDATA_DUMP_STATIC: Generate static symbols.
+ * @GDK_PIXDATA_DUMP_CONST: Generate const symbols.
+ * @GDK_PIXDATA_DUMP_RLE_DECODER: Provide a <function>*_RUN_LENGTH_DECODE(image_buf, rle_data, size, bpp)</function> 
+ *    macro definition  to  decode  run-length encoded image data.
+ *  
+ * An enumeration which is used by gdk_pixdata_to_csource() to
+ * determine the form of C source to be generated. The three values
+ * @GDK_PIXDATA_DUMP_PIXDATA_STREAM, @GDK_PIXDATA_DUMP_PIXDATA_STRUCT
+ * and @GDK_PIXDATA_DUMP_MACROS are mutually exclusive, as are
+ * @GDK_PIXBUF_DUMP_GTYPES and @GDK_PIXBUF_DUMP_CTYPES. The remaining
+ * elements are optional flags that can be freely added. 
+ **/
 typedef enum
 {
   /* type of source to save */