Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 603 insertions, 0 deletions

diff --git a/app/operations/gimpoperationcagetransform.c b/app/operations/gimpoperationcagetransform.c
new file mode 100644
index 0000000..d2f0450
--- /dev/null
+++ b/app/operations/gimpoperationcagetransform.c
@@ -0,0 +1,603 @@
+/* GIMP - The GNU Image Manipulation Program
+ *
+ * gimpoperationcage.c
+ * Copyright (C) 2010 Michael Muré <batolettre@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "operations-types.h"
+
+#include "gimpoperationcagetransform.h"
+#include "gimpcageconfig.h"
+
+#include "gimp-intl.h"
+
+enum
+{
+  PROP_0,
+  PROP_CONFIG,
+  PROP_FILL,
+};
+
+
+static void         gimp_operation_cage_transform_finalize                (GObject             *object);
+static void         gimp_operation_cage_transform_get_property            (GObject             *object,
+                                                                           guint                property_id,
+                                                                           GValue              *value,
+                                                                           GParamSpec          *pspec);
+static void         gimp_operation_cage_transform_set_property            (GObject             *object,
+                                                                           guint                property_id,
+                                                                           const GValue        *value,
+                                                                           GParamSpec          *pspec);
+static void         gimp_operation_cage_transform_prepare                 (GeglOperation       *operation);
+static gboolean     gimp_operation_cage_transform_process                 (GeglOperation       *operation,
+                                                                           GeglBuffer          *in_buf,
+                                                                           GeglBuffer          *aux_buf,
+                                                                           GeglBuffer          *out_buf,
+                                                                           const GeglRectangle *roi,
+                                                                           gint                 level);
+static void         gimp_operation_cage_transform_interpolate_source_coords_recurs
+                                                                          (GimpOperationCageTransform  *oct,
+                                                                           GeglBuffer          *out_buf,
+                                                                           const GeglRectangle *roi,
+                                                                           GimpVector2          p1_s,
+                                                                           GimpVector2          p1_d,
+                                                                           GimpVector2          p2_s,
+                                                                           GimpVector2          p2_d,
+                                                                           GimpVector2          p3_s,
+                                                                           GimpVector2          p3_d,
+                                                                           gint                 recursion_depth,
+                                                                           gfloat              *coords);
+static GimpVector2  gimp_cage_transform_compute_destination               (GimpCageConfig      *config,
+                                                                           gfloat              *coef,
+                                                                           GeglSampler         *coef_sampler,
+                                                                           GimpVector2          coords);
+GeglRectangle       gimp_operation_cage_transform_get_cached_region       (GeglOperation       *operation,
+                                                                           const GeglRectangle *roi);
+GeglRectangle       gimp_operation_cage_transform_get_required_for_output (GeglOperation       *operation,
+                                                                           const gchar         *input_pad,
+                                                                           const GeglRectangle *roi);
+GeglRectangle       gimp_operation_cage_transform_get_bounding_box        (GeglOperation       *operation);
+
+
+G_DEFINE_TYPE (GimpOperationCageTransform, gimp_operation_cage_transform,
+                      GEGL_TYPE_OPERATION_COMPOSER)
+
+#define parent_class gimp_operation_cage_transform_parent_class
+
+
+static void
+gimp_operation_cage_transform_class_init (GimpOperationCageTransformClass *klass)
+{
+  GObjectClass               *object_class    = G_OBJECT_CLASS (klass);
+  GeglOperationClass         *operation_class = GEGL_OPERATION_CLASS (klass);
+  GeglOperationComposerClass *filter_class    = GEGL_OPERATION_COMPOSER_CLASS (klass);
+
+  object_class->get_property               = gimp_operation_cage_transform_get_property;
+  object_class->set_property               = gimp_operation_cage_transform_set_property;
+  object_class->finalize                   = gimp_operation_cage_transform_finalize;
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:cage-transform",
+                                 "categories",  "transform",
+                                 "description", _("Convert a set of coefficient buffer to a coordinate buffer for the GIMP cage tool"),
+                                 NULL);
+
+  operation_class->prepare                 = gimp_operation_cage_transform_prepare;
+
+  operation_class->get_required_for_output = gimp_operation_cage_transform_get_required_for_output;
+  operation_class->get_cached_region       = gimp_operation_cage_transform_get_cached_region;
+  operation_class->get_bounding_box        = gimp_operation_cage_transform_get_bounding_box;
+  /* XXX Temporarily disable multi-threading on this operation because
+   * it is much faster when single-threaded. See bug 787663.
+   */
+  operation_class->threaded                = FALSE;
+
+  filter_class->process                    = gimp_operation_cage_transform_process;
+
+  g_object_class_install_property (object_class, PROP_CONFIG,
+                                   g_param_spec_object ("config",
+                                                        "Config",
+                                                        "A GimpCageConfig object, that define the transformation",
+                                                        GIMP_TYPE_CAGE_CONFIG,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT));
+
+  g_object_class_install_property (object_class, PROP_FILL,
+                                   g_param_spec_boolean ("fill-plain-color",
+                                                         _("Fill with plain color"),
+                                                         _("Fill the original position of the cage with a plain color"),
+                                                         FALSE,
+                                                         G_PARAM_READWRITE));
+}
+
+static void
+gimp_operation_cage_transform_init (GimpOperationCageTransform *self)
+{
+  self->format_coords = babl_format_n(babl_type("float"), 2);
+}
+
+static void
+gimp_operation_cage_transform_finalize (GObject *object)
+{
+  GimpOperationCageTransform *self = GIMP_OPERATION_CAGE_TRANSFORM (object);
+
+  g_clear_object (&self->config);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_operation_cage_transform_get_property (GObject    *object,
+                                            guint       property_id,
+                                            GValue     *value,
+                                            GParamSpec *pspec)
+{
+  GimpOperationCageTransform *self = GIMP_OPERATION_CAGE_TRANSFORM (object);
+
+  switch (property_id)
+    {
+    case PROP_CONFIG:
+      g_value_set_object (value, self->config);
+      break;
+    case PROP_FILL:
+      g_value_set_boolean (value, self->fill_plain_color);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_operation_cage_transform_set_property (GObject      *object,
+                                            guint         property_id,
+                                            const GValue *value,
+                                            GParamSpec   *pspec)
+{
+  GimpOperationCageTransform *self = GIMP_OPERATION_CAGE_TRANSFORM (object);
+
+  switch (property_id)
+    {
+    case PROP_CONFIG:
+      if (self->config)
+        g_object_unref (self->config);
+      self->config = g_value_dup_object (value);
+      break;
+    case PROP_FILL:
+      self->fill_plain_color = g_value_get_boolean (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_operation_cage_transform_prepare (GeglOperation *operation)
+{
+  GimpOperationCageTransform *oct    = GIMP_OPERATION_CAGE_TRANSFORM (operation);
+  GimpCageConfig             *config = GIMP_CAGE_CONFIG (oct->config);
+
+  gegl_operation_set_format (operation, "input",
+                             babl_format_n (babl_type ("float"),
+                                            2 * gimp_cage_config_get_n_points (config)));
+  gegl_operation_set_format (operation, "output",
+                             babl_format_n (babl_type ("float"), 2));
+}
+
+static gboolean
+gimp_operation_cage_transform_process (GeglOperation       *operation,
+                                       GeglBuffer          *in_buf,
+                                       GeglBuffer          *aux_buf,
+                                       GeglBuffer          *out_buf,
+                                       const GeglRectangle *roi,
+                                       gint                 level)
+{
+  GimpOperationCageTransform *oct    = GIMP_OPERATION_CAGE_TRANSFORM (operation);
+  GimpCageConfig             *config = GIMP_CAGE_CONFIG (oct->config);
+  GeglRectangle               cage_bb;
+  gfloat                     *coords;
+  gfloat                     *coef;
+  const Babl                 *format_coef;
+  GeglSampler                *coef_sampler;
+  GimpVector2                 plain_color;
+  GeglBufferIterator         *it;
+  gint                        x, y;
+  gboolean                    output_set;
+  GimpCagePoint              *point;
+  guint                       n_cage_vertices;
+
+  /* pre-fill the out buffer with no-displacement coordinate */
+  it      = gegl_buffer_iterator_new (out_buf, roi, 0, NULL,
+                                      GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE, 1);
+  cage_bb = gimp_cage_config_get_bounding_box (config);
+
+  point = &(g_array_index (config->cage_points, GimpCagePoint, 0));
+  plain_color.x = (gint) point->src_point.x;
+  plain_color.y = (gint) point->src_point.y;
+
+  n_cage_vertices = gimp_cage_config_get_n_points (config);
+
+  while (gegl_buffer_iterator_next (it))
+    {
+      /* iterate inside the roi */
+      gint    n_pixels = it->length;
+      gfloat *output   = it->items[0].data;
+
+      x = it->items[0].roi.x; /* initial x         */
+      y = it->items[0].roi.y; /* and y coordinates */
+
+      while (n_pixels--)
+        {
+          output_set = FALSE;
+          if (oct->fill_plain_color)
+            {
+              if (x > cage_bb.x &&
+                  y > cage_bb.y &&
+                  x < cage_bb.x + cage_bb.width &&
+                  y < cage_bb.y + cage_bb.height)
+                {
+                  if (gimp_cage_config_point_inside (config, x, y))
+                    {
+                      output[0] = plain_color.x;
+                      output[1] = plain_color.y;
+                      output_set = TRUE;
+                    }
+                }
+            }
+          if (!output_set)
+            {
+              output[0] = x + 0.5;
+              output[1] = y + 0.5;
+            }
+
+          output += 2;
+
+          /* update x and y coordinates */
+          x++;
+          if (x >= (it->items[0].roi.x + it->items[0].roi.width))
+            {
+              x = it->items[0].roi.x;
+              y++;
+            }
+        }
+    }
+
+  if (! aux_buf)
+    return TRUE;
+
+  gegl_operation_progress (operation, 0.0, "");
+
+  /* pre-allocate memory outside of the loop */
+  coords       = g_slice_alloc (2 * sizeof (gfloat));
+  coef         = g_malloc (n_cage_vertices * 2 * sizeof (gfloat));
+  format_coef  = babl_format_n (babl_type ("float"), 2 * n_cage_vertices);
+  coef_sampler = gegl_buffer_sampler_new (aux_buf,
+                                          format_coef, GEGL_SAMPLER_NEAREST);
+
+  /* compute, reverse and interpolate the transformation */
+  for (y = cage_bb.y; y < cage_bb.y + cage_bb.height - 1; y++)
+    {
+      GimpVector2 p1_d, p2_d, p3_d, p4_d;
+      GimpVector2 p1_s, p2_s, p3_s, p4_s;
+
+      p1_s.y = y;
+      p2_s.y = y+1;
+      p3_s.y = y+1;
+      p3_s.x = cage_bb.x;
+      p4_s.y = y;
+      p4_s.x = cage_bb.x;
+
+      p3_d = gimp_cage_transform_compute_destination (config, coef, coef_sampler, p3_s);
+      p4_d = gimp_cage_transform_compute_destination (config, coef, coef_sampler, p4_s);
+
+      for (x = cage_bb.x; x < cage_bb.x + cage_bb.width - 1; x++)
+        {
+          p1_s = p4_s;
+          p2_s = p3_s;
+          p3_s.x = x+1;
+          p4_s.x = x+1;
+
+          p1_d = p4_d;
+          p2_d = p3_d;
+          p3_d = gimp_cage_transform_compute_destination (config, coef, coef_sampler, p3_s);
+          p4_d = gimp_cage_transform_compute_destination (config, coef, coef_sampler, p4_s);
+
+          if (gimp_cage_config_point_inside (config, x, y))
+            {
+              gimp_operation_cage_transform_interpolate_source_coords_recurs (oct,
+                                                                              out_buf,
+                                                                              roi,
+                                                                              p1_s, p1_d,
+                                                                              p2_s, p2_d,
+                                                                              p3_s, p3_d,
+                                                                              0,
+                                                                              coords);
+
+              gimp_operation_cage_transform_interpolate_source_coords_recurs (oct,
+                                                                              out_buf,
+                                                                              roi,
+                                                                              p1_s, p1_d,
+                                                                              p3_s, p3_d,
+                                                                              p4_s, p4_d,
+                                                                              0,
+                                                                              coords);
+            }
+        }
+
+      if ((y - cage_bb.y) % 20 == 0)
+        {
+          gdouble fraction = ((gdouble) (y - cage_bb.y) /
+                              (gdouble) (cage_bb.height));
+
+          /*  0.0 and 1.0 indicate progress start/end, so avoid them  */
+          if (fraction > 0.0 && fraction < 1.0)
+            {
+              gegl_operation_progress (operation, fraction, "");
+            }
+        }
+    }
+
+  g_object_unref (coef_sampler);
+  g_free (coef);
+  g_slice_free1 (2 * sizeof (gfloat), coords);
+
+  gegl_operation_progress (operation, 1.0, "");
+
+  return TRUE;
+}
+
+
+static void
+gimp_operation_cage_transform_interpolate_source_coords_recurs (GimpOperationCageTransform *oct,
+                                                                GeglBuffer                 *out_buf,
+                                                                const GeglRectangle        *roi,
+                                                                GimpVector2                 p1_s,
+                                                                GimpVector2                 p1_d,
+                                                                GimpVector2                 p2_s,
+                                                                GimpVector2                 p2_d,
+                                                                GimpVector2                 p3_s,
+                                                                GimpVector2                 p3_d,
+                                                                gint                        recursion_depth,
+                                                                gfloat                     *coords)
+{
+  gint xmin, xmax, ymin, ymax, x, y;
+
+  /* Stop recursion if all 3 vertices of the triangle are outside the
+   * ROI (left/right or above/below).
+   */
+  if (p1_d.x >= roi->x + roi->width &&
+      p2_d.x >= roi->x + roi->width &&
+      p3_d.x >= roi->x + roi->width) return;
+  if (p1_d.y >= roi->y + roi->height &&
+      p2_d.y >= roi->y + roi->height &&
+      p3_d.y >= roi->y + roi->height) return;
+
+  if (p1_d.x < roi->x &&
+      p2_d.x < roi->x &&
+      p3_d.x < roi->x) return;
+  if (p1_d.y < roi->y &&
+      p2_d.y < roi->y &&
+      p3_d.y < roi->y) return;
+
+  xmin = xmax = lrint (p1_d.x);
+  ymin = ymax = lrint (p1_d.y);
+
+  x = lrint (p2_d.x);
+  xmin = MIN (x, xmin);
+  xmax = MAX (x, xmax);
+
+  x = lrint (p3_d.x);
+  xmin = MIN (x, xmin);
+  xmax = MAX (x, xmax);
+
+  y = lrint (p2_d.y);
+  ymin = MIN (y, ymin);
+  ymax = MAX (y, ymax);
+
+  y = lrint (p3_d.y);
+  ymin = MIN (y, ymin);
+  ymax = MAX (y, ymax);
+
+  /* test if there is no more pixel in the triangle */
+  if (xmin == xmax || ymin == ymax)
+    return;
+
+  /* test if the triangle is implausibly large as manifested by too deep recursion */
+  if (recursion_depth > 5)
+    return;
+
+  /* test if the triangle is small enough.
+   *
+   * if yes, we compute the coefficient of the barycenter for the
+   * pixel (x,y) and see if a pixel is inside (ie the 3 coef have the
+   * same sign).
+   */
+  if (xmax - xmin == 1 && ymax - ymin == 1)
+    {
+      gdouble a, b, c, denom, x, y;
+
+      x = (gdouble) xmin + 0.5;
+      y = (gdouble) ymin + 0.5;
+
+      denom = (p2_d.x - p1_d.x) * p3_d.y + (p1_d.x - p3_d.x) * p2_d.y + (p3_d.x - p2_d.x) * p1_d.y;
+      a = ((p2_d.x - x) * p3_d.y + (x - p3_d.x) * p2_d.y + (p3_d.x - p2_d.x) * y) / denom;
+      b = - ((p1_d.x - x) * p3_d.y + (x - p3_d.x) * p1_d.y + (p3_d.x - p1_d.x) * y) / denom;
+      c = 1.0 - a - b;
+
+      /* if a pixel is inside, we compute its source coordinate and
+       * set it in the output buffer
+       */
+      if ((a > 0 && b > 0 && c > 0) || (a < 0 && b < 0 && c < 0))
+        {
+          GeglRectangle rect = { 0, 0, 1, 1 };
+          gfloat        coords[2];
+
+          rect.x = xmin;
+          rect.y = ymin;
+
+          coords[0] = (a * p1_s.x + b * p2_s.x + c * p3_s.x);
+          coords[1] = (a * p1_s.y + b * p2_s.y + c * p3_s.y);
+
+          gegl_buffer_set (out_buf,
+                           &rect,
+                           0,
+                           oct->format_coords,
+                           coords,
+                           GEGL_AUTO_ROWSTRIDE);
+        }
+
+      return;
+    }
+  else
+    {
+      /* we cut the triangle in 4 sub-triangle and treat it recursively */
+      /*
+       *       /\
+       *      /__\
+       *     /\  /\
+       *    /__\/__\
+       *
+       */
+
+      GimpVector2 pm1_d, pm2_d, pm3_d;
+      GimpVector2 pm1_s, pm2_s, pm3_s;
+      gint        next_depth = recursion_depth + 1;
+
+      pm1_d.x = (p1_d.x + p2_d.x) / 2.0;
+      pm1_d.y = (p1_d.y + p2_d.y) / 2.0;
+
+      pm2_d.x = (p2_d.x + p3_d.x) / 2.0;
+      pm2_d.y = (p2_d.y + p3_d.y) / 2.0;
+
+      pm3_d.x = (p3_d.x + p1_d.x) / 2.0;
+      pm3_d.y = (p3_d.y + p1_d.y) / 2.0;
+
+      pm1_s.x = (p1_s.x + p2_s.x) / 2.0;
+      pm1_s.y = (p1_s.y + p2_s.y) / 2.0;
+
+      pm2_s.x = (p2_s.x + p3_s.x) / 2.0;
+      pm2_s.y = (p2_s.y + p3_s.y) / 2.0;
+
+      pm3_s.x = (p3_s.x + p1_s.x) / 2.0;
+      pm3_s.y = (p3_s.y + p1_s.y) / 2.0;
+
+      gimp_operation_cage_transform_interpolate_source_coords_recurs (oct,
+                                                                      out_buf,
+                                                                      roi,
+                                                                      p1_s, p1_d,
+                                                                      pm1_s, pm1_d,
+                                                                      pm3_s, pm3_d,
+                                                                      next_depth,
+                                                                      coords);
+
+      gimp_operation_cage_transform_interpolate_source_coords_recurs (oct,
+                                                                      out_buf,
+                                                                      roi,
+                                                                      pm1_s, pm1_d,
+                                                                      p2_s, p2_d,
+                                                                      pm2_s, pm2_d,
+                                                                      next_depth,
+                                                                      coords);
+
+      gimp_operation_cage_transform_interpolate_source_coords_recurs (oct,
+                                                                      out_buf,
+                                                                      roi,
+                                                                      pm1_s, pm1_d,
+                                                                      pm2_s, pm2_d,
+                                                                      pm3_s, pm3_d,
+                                                                      next_depth,
+                                                                      coords);
+
+      gimp_operation_cage_transform_interpolate_source_coords_recurs (oct,
+                                                                      out_buf,
+                                                                      roi,
+                                                                      pm3_s, pm3_d,
+                                                                      pm2_s, pm2_d,
+                                                                      p3_s, p3_d,
+                                                                      next_depth,
+                                                                      coords);
+    }
+}
+
+static GimpVector2
+gimp_cage_transform_compute_destination (GimpCageConfig *config,
+                                         gfloat         *coef,
+                                         GeglSampler    *coef_sampler,
+                                         GimpVector2     coords)
+{
+  GimpVector2    result = {0, 0};
+  gint           n_cage_vertices = gimp_cage_config_get_n_points (config);
+  gint           i;
+  GimpCagePoint *point;
+
+  gegl_sampler_get (coef_sampler,
+                    coords.x, coords.y, NULL, coef, GEGL_ABYSS_NONE);
+
+  for (i = 0; i < n_cage_vertices; i++)
+    {
+      point = &g_array_index (config->cage_points, GimpCagePoint, i);
+
+      result.x += coef[i] * point->dest_point.x;
+      result.y += coef[i] * point->dest_point.y;
+
+      result.x += coef[i + n_cage_vertices] * point->edge_scaling_factor * point->edge_normal.x;
+      result.y += coef[i + n_cage_vertices] * point->edge_scaling_factor * point->edge_normal.y;
+    }
+
+  return result;
+}
+
+GeglRectangle
+gimp_operation_cage_transform_get_cached_region (GeglOperation       *operation,
+                                                 const GeglRectangle *roi)
+{
+  GeglRectangle result = *gegl_operation_source_get_bounding_box (operation,
+                                                                  "input");
+
+  return result;
+}
+
+GeglRectangle
+gimp_operation_cage_transform_get_required_for_output (GeglOperation       *operation,
+                                                       const gchar         *input_pad,
+                                                       const GeglRectangle *roi)
+{
+  GeglRectangle result = *gegl_operation_source_get_bounding_box (operation,
+                                                                  "input");
+
+  return result;
+}
+
+GeglRectangle
+gimp_operation_cage_transform_get_bounding_box (GeglOperation *operation)
+{
+  GeglRectangle result = *gegl_operation_source_get_bounding_box (operation,
+                                                                  "input");
+
+  return result;
+}