[gimp/metadata-browser] app: port gimp_brush_core_color_area_with_pixmap() to GeglBufferIterator

[Roman Joost <romanofski src gnome org>]

commit 3879f19968c4e3893debd400fb6905857fe22b69
Author: Michael Natterer <mitch gimp org>
Date:   Sat Apr 14 08:41:08 2012 +0200

    app: port gimp_brush_core_color_area_with_pixmap() to GeglBufferIterator
    
    This can be simplified, needs revisiting.

 app/paint/gimpbrushcore.c  |   62 +++++++++++++++++++------------------------
 app/paint/gimpbrushcore.h  |    2 +-
 app/paint/gimppaintbrush.c |    4 +--
 3 files changed, 29 insertions(+), 39 deletions(-)
---
diff --git a/app/paint/gimpbrushcore.c b/app/paint/gimpbrushcore.c
index e6e3dbb..ddfabf1 100644
--- a/app/paint/gimpbrushcore.c
+++ b/app/paint/gimpbrushcore.c
@@ -25,8 +25,6 @@
 
 #include "paint-types.h"
 
-#include "base/pixel-region.h"
-
 #include "gegl/gimp-gegl-utils.h"
 
 #include "core/gimpbrush.h"
@@ -119,14 +117,12 @@ static void      gimp_brush_core_invalidate_cache   (GimpBrush         *brush,
                                                      GimpBrushCore     *core);
 
 /*  brush pipe utility functions  */
-static void  gimp_brush_core_paint_line_pixmap_mask (GimpImage         *dest,
-                                                     GimpDrawable      *drawable,
+static void  gimp_brush_core_paint_line_pixmap_mask (GimpDrawable      *drawable,
                                                      const GimpTempBuf *pixmap_mask,
                                                      const GimpTempBuf *brush_mask,
                                                      guchar            *d,
                                                      gint               x,
                                                      gint               y,
-                                                     gint               bytes,
                                                      gint               width,
                                                      GimpBrushApplicationMode  mode);
 
@@ -1546,28 +1542,24 @@ void
 gimp_brush_core_color_area_with_pixmap (GimpBrushCore            *core,
                                         GimpDrawable             *drawable,
                                         const GimpCoords         *coords,
-                                        GimpTempBuf              *area,
+                                        GeglBuffer               *area,
                                         gint                      area_x,
                                         gint                      area_y,
                                         GimpBrushApplicationMode  mode)
 {
-  GimpImage         *image;
-  PixelRegion        destPR;
-  void              *pr;
-  guchar            *d;
-  gint               ulx;
-  gint               uly;
-  gint               offsetx;
-  gint               offsety;
-  gint               y;
-  const GimpTempBuf *pixmap_mask;
-  const GimpTempBuf *brush_mask;
+  GeglBufferIterator *iter;
+  GeglRectangle      *roi;
+  gint                bpp;
+  gint                ulx;
+  gint                uly;
+  gint                offsetx;
+  gint                offsety;
+  const GimpTempBuf  *pixmap_mask;
+  const GimpTempBuf  *brush_mask;
 
   g_return_if_fail (GIMP_IS_BRUSH (core->brush));
   g_return_if_fail (core->brush->pixmap != NULL);
 
-  image = gimp_item_get_image (GIMP_ITEM (drawable));
-
   /*  scale the brushes  */
   pixmap_mask = gimp_brush_core_transform_pixmap (core, core->brush);
 
@@ -1579,11 +1571,6 @@ gimp_brush_core_color_area_with_pixmap (GimpBrushCore            *core,
   else
     brush_mask = NULL;
 
-  pixel_region_init_temp_buf (&destPR, area,
-                              0, 0, area->width, area->height);
-
-  pr = pixel_regions_register (1, &destPR);
-
   /*  Calculate upper left corner of brush as in
    *  gimp_paint_core_get_paint_area.  Ugly to have to do this here, too.
    */
@@ -1593,38 +1580,43 @@ gimp_brush_core_color_area_with_pixmap (GimpBrushCore            *core,
   /*  Not sure why this is necessary, but empirically the code does
    *  not work without it for even-sided brushes.  See bug #166622.
    */
-  if (pixmap_mask->width %2 == 0)
+  if (pixmap_mask->width % 2 == 0)
     ulx += ROUND (coords->x) - floor (coords->x);
-  if (pixmap_mask->height %2 == 0)
+  if (pixmap_mask->height % 2 == 0)
     uly += ROUND (coords->y) - floor (coords->y);
 
   offsetx = area_x - ulx;
   offsety = area_y - uly;
 
-  for (; pr != NULL; pr = pixel_regions_process (pr))
+  bpp = babl_format_get_bytes_per_pixel (gegl_buffer_get_format (area));
+
+  iter = gegl_buffer_iterator_new (area, NULL, 0, NULL,
+                                   GEGL_BUFFER_WRITE, GEGL_ABYSS_NONE);
+  roi = &iter->roi[0];
+
+  while (gegl_buffer_iterator_next (iter))
     {
-      d = destPR.data;
+      guchar *d = iter->data[0];
+      gint    y;
 
-      for (y = 0; y < destPR.h; y++)
+      for (y = 0; y < roi->height; y++)
         {
-          gimp_brush_core_paint_line_pixmap_mask (image, drawable,
+          gimp_brush_core_paint_line_pixmap_mask (drawable,
                                                   pixmap_mask, brush_mask,
                                                   d, offsetx, y + offsety,
-                                                  destPR.bytes, destPR.w, mode);
-          d += destPR.rowstride;
+                                                  roi->width, mode);
+          d += roi->width * bpp;
         }
     }
 }
 
 static void
-gimp_brush_core_paint_line_pixmap_mask (GimpImage                *dest,
-                                        GimpDrawable             *drawable,
+gimp_brush_core_paint_line_pixmap_mask (GimpDrawable             *drawable,
                                         const GimpTempBuf        *pixmap_mask,
                                         const GimpTempBuf        *brush_mask,
                                         guchar                   *d,
                                         gint                      x,
                                         gint                      y,
-                                        gint                      bytes,
                                         gint                      width,
                                         GimpBrushApplicationMode  mode)
 {
diff --git a/app/paint/gimpbrushcore.h b/app/paint/gimpbrushcore.h
index ef7008d..1110a14 100644
--- a/app/paint/gimpbrushcore.h
+++ b/app/paint/gimpbrushcore.h
@@ -121,7 +121,7 @@ void   gimp_brush_core_color_area_with_pixmap
                                       (GimpBrushCore            *core,
                                        GimpDrawable             *drawable,
                                        const GimpCoords         *coords,
-                                       GimpTempBuf              *area,
+                                       GeglBuffer               *area,
                                        gint                      area_x,
                                        gint                      area_y,
                                        GimpBrushApplicationMode  mode);
diff --git a/app/paint/gimppaintbrush.c b/app/paint/gimppaintbrush.c
index 86545be..f55a92c 100644
--- a/app/paint/gimppaintbrush.c
+++ b/app/paint/gimppaintbrush.c
@@ -181,11 +181,9 @@ _gimp_paintbrush_motion (GimpPaintCore    *paint_core,
       /* otherwise check if the brush has a pixmap and use that to
        * color the area
        */
-      GimpTempBuf *area = gimp_gegl_buffer_get_temp_buf (paint_buffer);
-
       gimp_brush_core_color_area_with_pixmap (brush_core, drawable,
                                               coords,
-                                              area,
+                                              paint_buffer,
                                               paint_buffer_x,
                                               paint_buffer_y,
                                               gimp_paint_options_get_brush_mode (paint_options));