cogl: improves header and coding style consistency

We've had complaints that our Cogl code/headers are a bit "special" so
this is a first pass at tidying things up by giving them some
consistency. These changes are all consistent with how new code in Cogl
is being written, but the style isn't consistently applied across all
code yet.

There are two parts to this patch; but since each one required a large
amount of effort to maintain tidy indenting it made sense to combine the
changes to reduce the time spent re indenting the same lines.

The first change is to use a consistent style for declaring function
prototypes in headers. Cogl headers now consistently use this style for
prototypes:

 return_type
 cogl_function_name (CoglType arg0,
                     CoglType arg1);

Not everyone likes this style, but it seems that most of the currently
active Cogl developers agree on it.

The second change is to constrain the use of redundant glib data types
in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all
been replaced with int, unsigned int, float, long, unsigned long and char
respectively. When talking about pixel data; use of guchar has been
replaced with guint8, otherwise unsigned char can be used.

The glib types that we continue to use for portability are gboolean,
gint{8,16,32,64}, guint{8,16,32,64} and gsize.

The general intention is that Cogl should look palatable to the widest
range of C programmers including those outside the Gnome community so
- especially for the public API - we want to minimize the number of
foreign looking typedefs.

cogl/cogl-pixel-buffer.c

@@ -76,12 +76,15 @@
 
 #endif
 
-static void _cogl_pixel_buffer_free (CoglPixelBuffer *buffer);
+static void
+_cogl_pixel_buffer_free (CoglPixelBuffer *buffer);
 
 #if !defined (COGL_HAS_GLES)
-static const CoglBufferVtable cogl_pixel_buffer_vtable;
+static const CoglBufferVtable
+cogl_pixel_buffer_vtable;
 #endif
-static const CoglBufferVtable cogl_malloc_pixel_buffer_vtable;
+static const CoglBufferVtable
+cogl_malloc_pixel_buffer_vtable;
 
 /* we don't want to use the stock COGL_HANDLE_DEFINE * for 2 reasons:
  *   - it defines already deprecated symbols
@@ -138,7 +141,7 @@ cogl_is_##type_name##_EXP (CoglHandle handle)		        \
 COGL_HANDLE_DEFINE_EXP(PixelBuffer, pixel_buffer)
 
 CoglHandle
-cogl_pixel_buffer_new_EXP (guint size)
+cogl_pixel_buffer_new_EXP (unsigned int size)
 {
   CoglPixelBuffer *pixel_buffer = g_slice_new0 (CoglPixelBuffer);
   CoglBuffer *buffer = COGL_BUFFER (pixel_buffer);
@@ -179,14 +182,14 @@ cogl_pixel_buffer_new_EXP (guint size)
 }
 
 CoglHandle
-cogl_pixel_buffer_new_for_size_EXP (guint            width,
-                                    guint            height,
-                                    CoglPixelFormat  format,
-                                    guint           *rowstride)
+cogl_pixel_buffer_new_for_size_EXP (unsigned int    width,
+                                    unsigned int    height,
+                                    CoglPixelFormat format,
+                                    unsigned int   *rowstride)
 {
   CoglHandle buffer;
   CoglPixelBuffer *pixel_buffer;
-  guint stride;
+  unsigned int stride;
 
   /* creating a buffer to store "any" format does not make sense */
   if (G_UNLIKELY (format == COGL_PIXEL_FORMAT_ANY))
@@ -225,13 +228,13 @@ _cogl_pixel_buffer_free (CoglPixelBuffer *buffer)
 }
 
 #if !defined (COGL_HAS_GLES)
-static guchar *
+static guint8 *
 _cogl_pixel_buffer_map (CoglBuffer       *buffer,
                         CoglBufferAccess  access)
 {
   CoglPixelBuffer *pixel_buffer = COGL_PIXEL_BUFFER (buffer);
   GLenum gl_target;
-  guchar *data;
+  guint8 *data;
 
   _COGL_GET_CONTEXT (ctx, NULL);
 
@@ -281,9 +284,9 @@ _cogl_pixel_buffer_unmap (CoglBuffer *buffer)
 
 static gboolean
 _cogl_pixel_buffer_set_data (CoglBuffer   *buffer,
-                             guint         offset,
-                             const guchar *data,
-                             guint         size)
+                             unsigned int  offset,
+                             const guint8 *data,
+                             unsigned int  size)
 {
   CoglPixelBuffer *pixel_buffer = COGL_PIXEL_BUFFER (buffer);
 
@@ -315,13 +318,13 @@ _cogl_pixel_buffer_set_data (CoglBuffer   *buffer,
 
 #if 0
 gboolean
-cogl_pixel_buffer_set_region_EXP (CoglHandle  buffer,
-                                  guchar     *data,
-                                  guint       src_width,
-                                  guint       src_height,
-                                  guint       src_rowstride,
-                                  guint       dst_x,
-                                  guint       dst_y)
+cogl_pixel_buffer_set_region_EXP (CoglHandle   buffer,
+                                  guint8      *data,
+                                  unsigned int src_width,
+                                  unsigned int src_height,
+                                  unsigned int src_rowstride,
+                                  unsigned int dst_x,
+                                  unsigned int dst_y)
 {
   if (!cogl_is_pixel_buffer (buffer))
     return FALSE;
@@ -342,7 +345,7 @@ static const CoglBufferVtable cogl_pixel_buffer_vtable =
  * Fallback path, buffer->data points to a malloc'ed buffer.
  */
 
-static guchar *
+static guint8 *
 _cogl_malloc_pixel_buffer_map (CoglBuffer       *buffer,
                                CoglBufferAccess  access)
 {
@@ -358,9 +361,9 @@ _cogl_malloc_pixel_buffer_unmap (CoglBuffer *buffer)
 
 static gboolean
 _cogl_malloc_pixel_buffer_set_data (CoglBuffer   *buffer,
-                                    guint         offset,
-                                    const guchar *data,
-                                    guint         size)
+                                    unsigned int  offset,
+                                    const guint8 *data,
+                                    unsigned int  size)
 {
   memcpy (buffer->data + offset, data, size);
   return TRUE;