Bug 561186 – GdkPixbuf API type checking needs cleanup

2008-11-30  Christian Dywan  <christian@imendio.com>

	Bug 561186 – GdkPixbuf API type checking needs cleanup

	* gdk-pixbuf-loader.c (gdk_pixbuf_loader_write),
	(gdk_pixbuf_loader_get_pixbuf), (gdk_pixbuf_loader_get_animation),
	(gdk_pixbuf_loader_close), (gdk_pixbuf_loader_get_format):
	* gdk-pixbuf-scale.c (gdk_pixbuf_scale), (gdk_pixbuf_composite),
	(gdk_pixbuf_composite_color), (gdk_pixbuf_scale_simple),
	(gdk_pixbuf_composite_color_simple):
	* gdk-pixbuf-simple-anim.c (gdk_pixbuf_simple_anim_add_frame):
	* gdk-pixbuf-util.c (gdk_pixbuf_add_alpha),
	(gdk_pixbuf_apply_embedded_orientation):
        Improve type checking in pixbuf API

svn path=/trunk/; revision=21832

5 files changed, 28 insertions, 18 deletions

diff --git a/gdk-pixbuf/ChangeLog b/gdk-pixbuf/ChangeLog
index 4d88a4359..577b267fc 100644
--- a/gdk-pixbuf/ChangeLog
+++ b/gdk-pixbuf/ChangeLog
@@ -1,3 +1,18 @@
+2008-11-30  Christian Dywan  <christian@imendio.com>
+
+	Bug 561186 – GdkPixbuf API type checking needs cleanup
+
+	* gdk-pixbuf-loader.c (gdk_pixbuf_loader_write),
+	(gdk_pixbuf_loader_get_pixbuf), (gdk_pixbuf_loader_get_animation),
+	(gdk_pixbuf_loader_close), (gdk_pixbuf_loader_get_format):
+	* gdk-pixbuf-scale.c (gdk_pixbuf_scale), (gdk_pixbuf_composite),
+	(gdk_pixbuf_composite_color), (gdk_pixbuf_scale_simple),
+	(gdk_pixbuf_composite_color_simple):
+	* gdk-pixbuf-simple-anim.c (gdk_pixbuf_simple_anim_add_frame):
+	* gdk-pixbuf-util.c (gdk_pixbuf_add_alpha),
+	(gdk_pixbuf_apply_embedded_orientation):
+        Improve type checking in pixbuf API
+
 2008-10-13  Matthias Clasen  <mclasen@redhat.com>
 
 	Bug 555791 – Natuilus Crashes when opening USB MP3 Player Contents
diff --git a/gdk-pixbuf/gdk-pixbuf-loader.c b/gdk-pixbuf/gdk-pixbuf-loader.c
index 9ec812599..f51d4478d 100644
--- a/gdk-pixbuf/gdk-pixbuf-loader.c
+++ b/gdk-pixbuf/gdk-pixbuf-loader.c
@@ -446,7 +446,6 @@ gdk_pixbuf_loader_write (GdkPixbufLoader *loader,
 {
         GdkPixbufLoaderPrivate *priv;
   
-        g_return_val_if_fail (loader != NULL, FALSE);
         g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), FALSE);
   
         g_return_val_if_fail (buf != NULL, FALSE);
@@ -632,7 +631,6 @@ gdk_pixbuf_loader_get_pixbuf (GdkPixbufLoader *loader)
 {
         GdkPixbufLoaderPrivate *priv;
   
-        g_return_val_if_fail (loader != NULL, NULL);
         g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
   
         priv = loader->priv;
@@ -661,7 +659,6 @@ gdk_pixbuf_loader_get_animation (GdkPixbufLoader *loader)
 {
         GdkPixbufLoaderPrivate *priv;
   
-        g_return_val_if_fail (loader != NULL, NULL);
         g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
   
         priv = loader->priv;
@@ -694,7 +691,6 @@ gdk_pixbuf_loader_close (GdkPixbufLoader *loader,
         GdkPixbufLoaderPrivate *priv;
         gboolean retval = TRUE;
   
-        g_return_val_if_fail (loader != NULL, TRUE);
         g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), TRUE);
         g_return_val_if_fail (error == NULL || *error == NULL, TRUE);
   
@@ -773,7 +769,6 @@ gdk_pixbuf_loader_get_format (GdkPixbufLoader *loader)
 {
         GdkPixbufLoaderPrivate *priv;
   
-        g_return_val_if_fail (loader != NULL, NULL);
         g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
   
         priv = loader->priv;
diff --git a/gdk-pixbuf/gdk-pixbuf-scale.c b/gdk-pixbuf/gdk-pixbuf-scale.c
index 4ede8d868..694a8cb6e 100644
--- a/gdk-pixbuf/gdk-pixbuf-scale.c
+++ b/gdk-pixbuf/gdk-pixbuf-scale.c
@@ -70,8 +70,8 @@ gdk_pixbuf_scale (const GdkPixbuf *src,
 		  double           scale_y,
 		  GdkInterpType    interp_type)
 {
-  g_return_if_fail (src != NULL);
-  g_return_if_fail (dest != NULL);
+  g_return_if_fail (GDK_IS_PIXBUF (src));
+  g_return_if_fail (GDK_IS_PIXBUF (dest));
   g_return_if_fail (dest_x >= 0 && dest_x + dest_width <= dest->width);
   g_return_if_fail (dest_y >= 0 && dest_y + dest_height <= dest->height);
 
@@ -130,8 +130,8 @@ gdk_pixbuf_composite (const GdkPixbuf *src,
 		      GdkInterpType    interp_type,
 		      int              overall_alpha)
 {
-  g_return_if_fail (src != NULL);
-  g_return_if_fail (dest != NULL);
+  g_return_if_fail (GDK_IS_PIXBUF (src));
+  g_return_if_fail (GDK_IS_PIXBUF (dest));
   g_return_if_fail (dest_x >= 0 && dest_x + dest_width <= dest->width);
   g_return_if_fail (dest_y >= 0 && dest_y + dest_height <= dest->height);
   g_return_if_fail (overall_alpha >= 0 && overall_alpha <= 255);
@@ -197,8 +197,8 @@ gdk_pixbuf_composite_color (const GdkPixbuf *src,
 			    guint32          color1,
 			    guint32          color2)
 {
-  g_return_if_fail (src != NULL);
-  g_return_if_fail (dest != NULL);
+  g_return_if_fail (GDK_IS_PIXBUF (src));
+  g_return_if_fail (GDK_IS_PIXBUF (dest));
   g_return_if_fail (dest_x >= 0 && dest_x + dest_width <= dest->width);
   g_return_if_fail (dest_y >= 0 && dest_y + dest_height <= dest->height);
   g_return_if_fail (overall_alpha >= 0 && overall_alpha <= 255);
@@ -247,7 +247,7 @@ gdk_pixbuf_scale_simple (const GdkPixbuf *src,
 {
   GdkPixbuf *dest;
 
-  g_return_val_if_fail (src != NULL, NULL);
+  g_return_val_if_fail (GDK_IS_PIXBUF (src), NULL);
   g_return_val_if_fail (dest_width > 0, NULL);
   g_return_val_if_fail (dest_height > 0, NULL);
 
@@ -293,7 +293,7 @@ gdk_pixbuf_composite_color_simple (const GdkPixbuf *src,
 {
   GdkPixbuf *dest;
 
-  g_return_val_if_fail (src != NULL, NULL);
+  g_return_val_if_fail (GDK_IS_PIXBUF (src), NULL);
   g_return_val_if_fail (dest_width > 0, NULL);
   g_return_val_if_fail (dest_height > 0, NULL);
   g_return_val_if_fail (overall_alpha >= 0 && overall_alpha <= 255, NULL);
diff --git a/gdk-pixbuf/gdk-pixbuf-simple-anim.c b/gdk-pixbuf/gdk-pixbuf-simple-anim.c
index 108036f9d..3cd156044 100644
--- a/gdk-pixbuf/gdk-pixbuf-simple-anim.c
+++ b/gdk-pixbuf/gdk-pixbuf-simple-anim.c
@@ -423,8 +423,8 @@ gdk_pixbuf_simple_anim_add_frame (GdkPixbufSimpleAnim *animation,
   GdkPixbufFrame *frame;
   int nframe = 0;
   
-  g_return_if_fail (animation != NULL);
-  g_return_if_fail (pixbuf != NULL);
+  g_return_if_fail (GDK_IS_PIXBUF_SIMPLE_ANIM (animation));
+  g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
   
   nframe = g_list_length (animation->frames);
   
@@ -432,7 +432,7 @@ gdk_pixbuf_simple_anim_add_frame (GdkPixbufSimpleAnim *animation,
   frame->delay_time = (gint) (1000 / animation->rate);
   frame->elapsed = (gint) (frame->delay_time * nframe);
   animation->total_time += frame->delay_time;
-  frame->pixbuf = GDK_PIXBUF (g_object_ref (pixbuf));
+  frame->pixbuf = g_object_ref (pixbuf);
 
   animation->frames = g_list_append (animation->frames, frame);
 }
diff --git a/gdk-pixbuf/gdk-pixbuf-util.c b/gdk-pixbuf/gdk-pixbuf-util.c
index f682aec9b..6e8f09eac 100644
--- a/gdk-pixbuf/gdk-pixbuf-util.c
+++ b/gdk-pixbuf/gdk-pixbuf-util.c
@@ -55,7 +55,7 @@ gdk_pixbuf_add_alpha (const GdkPixbuf *pixbuf,
 	GdkPixbuf *new_pixbuf;
 	int x, y;
 
-	g_return_val_if_fail (pixbuf != NULL, NULL);
+	g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
 	g_return_val_if_fail (pixbuf->colorspace == GDK_COLORSPACE_RGB, NULL);
 	g_return_val_if_fail (pixbuf->n_channels == 3 || pixbuf->n_channels == 4, NULL);
 	g_return_val_if_fail (pixbuf->bits_per_sample == 8, NULL);
@@ -277,7 +277,7 @@ gdk_pixbuf_apply_embedded_orientation (GdkPixbuf *src)
 	GdkPixbuf   *temp;
 	GdkPixbuf   *dest;
 
-	g_return_val_if_fail (src != NULL, NULL);
+	g_return_val_if_fail (GDK_IS_PIXBUF (src), NULL);
 
 	/* Read the orientation option associated with the pixbuf */
 	orientation_string = gdk_pixbuf_get_option (src, "orientation");