Fill out parts of iters in _pixman_implementation_{src,dest}_iter_init()

This makes _pixman_implementation_{src,dest}_iter_init() responsible
for filling parts of the information in the iterators. Specifically,
the information passed as arguments is stored in the iterator.

Also add a height field to pixman_iter_t().

4 files changed, 24 insertions, 11 deletions

diff --git a/pixman/pixman-general.c b/pixman/pixman-general.c
index 872fb7e..1a0fa7c 100644
--- a/pixman/pixman-general.c
+++ b/pixman/pixman-general.c
@@ -44,12 +44,6 @@ general_src_iter_init (pixman_implementation_t *imp,
 		       int x, int y, int width, int height,
 		       uint8_t *buffer, iter_flags_t flags)
 {
-    iter->image = image;
-    iter->x = x;
-    iter->y = y;
-    iter->width = width;
-    iter->buffer = (uint32_t *)buffer;
-
     if (image->type == SOLID)
     {
 	_pixman_solid_fill_iter_init (
diff --git a/pixman/pixman-implementation.c b/pixman/pixman-implementation.c
index 892767e..bdd4543 100644
--- a/pixman/pixman-implementation.c
+++ b/pixman/pixman-implementation.c
@@ -274,6 +274,14 @@ _pixman_implementation_src_iter_init (pixman_implementation_t	*imp,
 				      uint8_t			*buffer,
 				      iter_flags_t		 flags)
 {
+    iter->image = image;
+    iter->buffer = (uint32_t *)buffer;
+    iter->x = x;
+    iter->y = y;
+    iter->width = width;
+    iter->height = height;
+    iter->flags = flags;
+
     if (!image)
     {
 	iter->get_scanline = get_scanline_null;
@@ -301,6 +309,14 @@ _pixman_implementation_dest_iter_init (pixman_implementation_t	*imp,
 				       uint8_t			*buffer,
 				       iter_flags_t		 flags)
 {
+    iter->image = image;
+    iter->buffer = (uint32_t *)buffer;
+    iter->x = x;
+    iter->y = y;
+    iter->width = width;
+    iter->height = height;
+    iter->flags = flags;
+
     (*imp->dest_iter_init) (
 	imp, iter, image, x, y, width, height, buffer, flags);
 }
diff --git a/pixman/pixman-private.h b/pixman/pixman-private.h
index 1473dc4..ea9545f 100644
--- a/pixman/pixman-private.h
+++ b/pixman/pixman-private.h
@@ -212,14 +212,19 @@ typedef enum
 
 struct pixman_iter_t
 {
-    pixman_iter_get_scanline_t	get_scanline;
-    pixman_iter_write_back_t	write_back;
-
+    /* These are initialized by _pixman_implementation_{src,dest}_init */
     pixman_image_t *		image;
     uint32_t *			buffer;
     int				x, y;
     int				width;
+    int				height;
+    iter_flags_t		flags;
+
+    /* These function pointers are initialized by the implementation */
+    pixman_iter_get_scanline_t	get_scanline;
+    pixman_iter_write_back_t	write_back;
 
+    /* These fields are scratch data that implementations can use */
     uint8_t *			bits;
     int				stride;
 };
diff --git a/pixman/pixman-sse2.c b/pixman/pixman-sse2.c
index d4a34e9..43a6bf2 100644
--- a/pixman/pixman-sse2.c
+++ b/pixman/pixman-sse2.c
@@ -6004,8 +6004,6 @@ sse2_src_iter_init (pixman_implementation_t *imp,
 
 		iter->bits = b + s * y + x * PIXMAN_FORMAT_BPP (f->format) / 8;
 		iter->stride = s;
-		iter->width = width;
-		iter->buffer = (uint32_t *)buffer;
 
 		iter->get_scanline = f->get_scanline;
 		return;