[gegl] sampler.c/h: tile size and offset more friendly to resize without too much slow down for bad rotatio

[Nicolas Robidoux <nrobidoux src gnome org>]

commit f31b7e999b8a4615a77136b73d13df05b7393fa0
Author: Nicolas Robidoux <nrobidoux git gnome org>
Date:   Sat Dec 29 19:35:25 2012 -0500

    sampler.c/h: tile size and offset more friendly to resize without too much slow down for bad rotations

 gegl/buffer/gegl-sampler.c |   12 ++++++------
 gegl/buffer/gegl-sampler.h |    2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/gegl/buffer/gegl-sampler.c b/gegl/buffer/gegl-sampler.c
index 515ea93..fa5b468 100644
--- a/gegl/buffer/gegl-sampler.c
+++ b/gegl/buffer/gegl-sampler.c
@@ -274,10 +274,10 @@ gegl_sampler_get_ptr (GeglSampler *const sampler,
       fetch_rectangle.height = maximum_height;
       fetch_rectangle.x =
         x + sampler->context_rect[0].x -
-        (maximum_width  - sampler->context_rect[0].width ) / (gint) 3;
+        (maximum_width  - sampler->context_rect[0].width ) / (gint) 4;
       fetch_rectangle.y =
         y + sampler->context_rect[0].y -
-        (maximum_height - sampler->context_rect[0].height) / (gint) 3;
+        (maximum_height - sampler->context_rect[0].height) / (gint) 4;
 
       gegl_buffer_get (sampler->buffer,
                        &fetch_rectangle,
@@ -347,9 +347,9 @@ gegl_sampler_get_from_buffer (GeglSampler *const sampler,
       fetch_rectangle.width  = maximum_width;
       fetch_rectangle.height = maximum_height;
       fetch_rectangle.x = x -
-        (maximum_width  - sampler->context_rect[0].width ) / (gint) 3;
+        (maximum_width  - sampler->context_rect[0].width ) / (gint) 4;
       fetch_rectangle.y = y -
-        (maximum_height - sampler->context_rect[0].height) / (gint) 3;
+        (maximum_height - sampler->context_rect[0].height) / (gint) 4;
 
       gegl_buffer_get (sampler->buffer,
                        &fetch_rectangle,
@@ -428,10 +428,10 @@ gegl_sampler_get_from_mipmap (GeglSampler *const sampler,
       fetch_rectangle.height = maximum_height;
       fetch_rectangle.x =
         x + sampler->context_rect[level].x -
-        (maximum_width  - sampler->context_rect[level].width ) / (gint) 3;
+        (maximum_width  - sampler->context_rect[level].width ) / (gint) 4;
       fetch_rectangle.y =
         y + sampler->context_rect[level].y -
-        (maximum_height - sampler->context_rect[level].height) / (gint) 3;
+        (maximum_height - sampler->context_rect[level].height) / (gint) 4;
 
       gegl_buffer_get (sampler->buffer,
                        &fetch_rectangle,
diff --git a/gegl/buffer/gegl-sampler.h b/gegl/buffer/gegl-sampler.h
index 999d32d..96c14b4 100644
--- a/gegl/buffer/gegl-sampler.h
+++ b/gegl/buffer/gegl-sampler.h
@@ -41,7 +41,7 @@ G_BEGIN_DECLS
  * Best thing to do seems to use rectangular buffer tiles that are
  * twice as wide as they are tall.
  */
-#define GEGL_SAMPLER_MAXIMUM_HEIGHT (32)
+#define GEGL_SAMPLER_MAXIMUM_HEIGHT (64)
 #define GEGL_SAMPLER_MAXIMUM_WIDTH (GEGL_SAMPLER_MAXIMUM_HEIGHT)
 
 typedef struct _GeglSamplerClass GeglSamplerClass;