Adding upstream version 2.10.36.upstream/2.10.36

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

1 files changed, 277 insertions, 0 deletions

diff --git a/app/paint/gimpconvolve.c b/app/paint/gimpconvolve.c
new file mode 100644
index 0000000..f2eea47
--- /dev/null
+++ b/app/paint/gimpconvolve.c
@@ -0,0 +1,277 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "paint-types.h"
+
+#include "gegl/gimp-gegl-loops.h"
+
+#include "core/gimp.h"
+#include "core/gimpbrush.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpdynamics.h"
+#include "core/gimpimage.h"
+#include "core/gimppickable.h"
+#include "core/gimpsymmetry.h"
+#include "core/gimptempbuf.h"
+
+#include "gimpconvolve.h"
+#include "gimpconvolveoptions.h"
+
+#include "gimp-intl.h"
+
+
+#define FIELD_COLS    4
+#define MIN_BLUR      64         /*  (8/9 original pixel)   */
+#define MAX_BLUR      0.25       /*  (1/33 original pixel)  */
+#define MIN_SHARPEN   -512
+#define MAX_SHARPEN   -64
+
+
+static void    gimp_convolve_paint            (GimpPaintCore    *paint_core,
+                                               GimpDrawable     *drawable,
+                                               GimpPaintOptions *paint_options,
+                                               GimpSymmetry     *sym,
+                                               GimpPaintState    paint_state,
+                                               guint32           time);
+static void    gimp_convolve_motion           (GimpPaintCore    *paint_core,
+                                               GimpDrawable     *drawable,
+                                               GimpPaintOptions *paint_options,
+                                               GimpSymmetry     *sym);
+
+static void    gimp_convolve_calculate_matrix (GimpConvolve     *convolve,
+                                               GimpConvolveType  type,
+                                               gint              radius_x,
+                                               gint              radius_y,
+                                               gdouble           rate);
+static gdouble gimp_convolve_sum_matrix       (const gfloat     *matrix);
+
+
+G_DEFINE_TYPE (GimpConvolve, gimp_convolve, GIMP_TYPE_BRUSH_CORE)
+
+
+void
+gimp_convolve_register (Gimp                      *gimp,
+                        GimpPaintRegisterCallback  callback)
+{
+  (* callback) (gimp,
+                GIMP_TYPE_CONVOLVE,
+                GIMP_TYPE_CONVOLVE_OPTIONS,
+                "gimp-convolve",
+                _("Convolve"),
+                "gimp-tool-blur");
+}
+
+static void
+gimp_convolve_class_init (GimpConvolveClass *klass)
+{
+  GimpPaintCoreClass *paint_core_class = GIMP_PAINT_CORE_CLASS (klass);
+
+  paint_core_class->paint = gimp_convolve_paint;
+}
+
+static void
+gimp_convolve_init (GimpConvolve *convolve)
+{
+  gint i;
+
+  for (i = 0; i < 9; i++)
+    convolve->matrix[i] = 1.0;
+
+  convolve->matrix_divisor = 9.0;
+}
+
+static void
+gimp_convolve_paint (GimpPaintCore    *paint_core,
+                     GimpDrawable     *drawable,
+                     GimpPaintOptions *paint_options,
+                     GimpSymmetry     *sym,
+                     GimpPaintState    paint_state,
+                     guint32           time)
+{
+  switch (paint_state)
+    {
+    case GIMP_PAINT_STATE_MOTION:
+      gimp_convolve_motion (paint_core, drawable, paint_options, sym);
+      break;
+
+    default:
+      break;
+    }
+}
+
+static void
+gimp_convolve_motion (GimpPaintCore    *paint_core,
+                      GimpDrawable     *drawable,
+                      GimpPaintOptions *paint_options,
+                      GimpSymmetry     *sym)
+{
+  GimpConvolve        *convolve   = GIMP_CONVOLVE (paint_core);
+  GimpBrushCore       *brush_core = GIMP_BRUSH_CORE (paint_core);
+  GimpConvolveOptions *options    = GIMP_CONVOLVE_OPTIONS (paint_options);
+  GimpContext         *context    = GIMP_CONTEXT (paint_options);
+  GimpDynamics        *dynamics   = GIMP_BRUSH_CORE (paint_core)->dynamics;
+  GimpImage           *image      = gimp_item_get_image (GIMP_ITEM (drawable));
+  GeglBuffer          *paint_buffer;
+  gint                 paint_buffer_x;
+  gint                 paint_buffer_y;
+  GimpTempBuf         *temp_buf;
+  GeglBuffer          *convolve_buffer;
+  gdouble              fade_point;
+  gdouble              opacity;
+  gdouble              rate;
+  const GimpCoords    *coords;
+  gint                 paint_width, paint_height;
+  gint                 n_strokes;
+  gint                 i;
+
+  fade_point = gimp_paint_options_get_fade (paint_options, image,
+                                            paint_core->pixel_dist);
+
+  coords = gimp_symmetry_get_origin (sym);
+  opacity = gimp_dynamics_get_linear_value (dynamics,
+                                            GIMP_DYNAMICS_OUTPUT_OPACITY,
+                                            coords,
+                                            paint_options,
+                                            fade_point);
+  if (opacity == 0.0)
+    return;
+
+  gimp_brush_core_eval_transform_dynamics (GIMP_BRUSH_CORE (paint_core),
+                                           drawable,
+                                           paint_options,
+                                           coords);
+  n_strokes = gimp_symmetry_get_size (sym);
+  for (i = 0; i < n_strokes; i++)
+    {
+      coords = gimp_symmetry_get_coords (sym, i);
+
+      gimp_brush_core_eval_transform_symmetry (brush_core, sym, i);
+
+      paint_buffer = gimp_paint_core_get_paint_buffer (paint_core, drawable,
+                                                       paint_options,
+                                                       GIMP_LAYER_MODE_NORMAL,
+                                                       coords,
+                                                       &paint_buffer_x,
+                                                       &paint_buffer_y,
+                                                       &paint_width,
+                                                       &paint_height);
+      if (! paint_buffer)
+        continue;
+
+      rate = (options->rate *
+              gimp_dynamics_get_linear_value (dynamics,
+                                              GIMP_DYNAMICS_OUTPUT_RATE,
+                                              coords,
+                                              paint_options,
+                                              fade_point));
+
+      gimp_convolve_calculate_matrix (convolve, options->type,
+                                      gimp_brush_get_width  (brush_core->brush) / 2,
+                                      gimp_brush_get_height (brush_core->brush) / 2,
+                                      rate);
+
+      /*  need a linear buffer for gimp_gegl_convolve()  */
+      temp_buf = gimp_temp_buf_new (gegl_buffer_get_width  (paint_buffer),
+                                    gegl_buffer_get_height (paint_buffer),
+                                    gegl_buffer_get_format (paint_buffer));
+      convolve_buffer = gimp_temp_buf_create_buffer (temp_buf);
+      gimp_temp_buf_unref (temp_buf);
+
+      gimp_gegl_buffer_copy (
+        gimp_drawable_get_buffer (drawable),
+        GEGL_RECTANGLE (paint_buffer_x,
+                        paint_buffer_y,
+                        gegl_buffer_get_width  (paint_buffer),
+                        gegl_buffer_get_height (paint_buffer)),
+        GEGL_ABYSS_NONE,
+        convolve_buffer,
+        GEGL_RECTANGLE (0, 0, 0, 0));
+
+      gimp_gegl_convolve (convolve_buffer,
+                          GEGL_RECTANGLE (0, 0,
+                                          gegl_buffer_get_width  (convolve_buffer),
+                                          gegl_buffer_get_height (convolve_buffer)),
+                          paint_buffer,
+                          GEGL_RECTANGLE (0, 0,
+                                          gegl_buffer_get_width  (paint_buffer),
+                                          gegl_buffer_get_height (paint_buffer)),
+                          convolve->matrix, 3, convolve->matrix_divisor,
+                          GIMP_NORMAL_CONVOL, TRUE);
+
+      g_object_unref (convolve_buffer);
+
+      gimp_brush_core_replace_canvas (brush_core, drawable,
+                                      coords,
+                                      MIN (opacity, GIMP_OPACITY_OPAQUE),
+                                      gimp_context_get_opacity (context),
+                                      gimp_paint_options_get_brush_mode (paint_options),
+                                      1.0,
+                                      GIMP_PAINT_INCREMENTAL);
+    }
+}
+
+static void
+gimp_convolve_calculate_matrix (GimpConvolve    *convolve,
+                                GimpConvolveType type,
+                                gint             radius_x,
+                                gint             radius_y,
+                                gdouble          rate)
+{
+  /*  find percent of tool pressure  */
+  const gdouble percent = MIN (rate / 100.0, 1.0);
+
+  convolve->matrix[0] = (radius_x && radius_y) ? 1.0 : 0.0;
+  convolve->matrix[1] = (radius_y)             ? 1.0 : 0.0;
+  convolve->matrix[2] = (radius_x && radius_y) ? 1.0 : 0.0;
+  convolve->matrix[3] = (radius_x)             ? 1.0 : 0.0;
+
+  /*  get the appropriate convolution matrix and size and divisor  */
+  switch (type)
+    {
+    case GIMP_CONVOLVE_BLUR:
+      convolve->matrix[4] = MIN_BLUR + percent * (MAX_BLUR - MIN_BLUR);
+      break;
+
+    case GIMP_CONVOLVE_SHARPEN:
+      convolve->matrix[4] = MIN_SHARPEN + percent * (MAX_SHARPEN - MIN_SHARPEN);
+      break;
+    }
+
+  convolve->matrix[5] = (radius_x)             ? 1.0 : 0.0;
+  convolve->matrix[6] = (radius_x && radius_y) ? 1.0 : 0.0;
+  convolve->matrix[7] = (radius_y)             ? 1.0 : 0.0;
+  convolve->matrix[8] = (radius_x && radius_y) ? 1.0 : 0.0;
+
+  convolve->matrix_divisor = gimp_convolve_sum_matrix (convolve->matrix);
+}
+
+static gdouble
+gimp_convolve_sum_matrix (const gfloat *matrix)
+{
+  gdouble sum = 0.0;
+  gint    i;
+
+  for (i = 0; i < 9; i++)
+    sum += matrix[i];
+
+  return sum;
+}