Adding upstream version 2.10.36.upstream/2.10.36

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

1 files changed, 395 insertions, 0 deletions

diff --git a/app/paint/gimppaintbrush.c b/app/paint/gimppaintbrush.c
new file mode 100644
index 0000000..2afd13c
--- /dev/null
+++ b/app/paint/gimppaintbrush.c
@@ -0,0 +1,395 @@
+/* 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 <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpmath/gimpmath.h"
+#include "libgimpbase/gimpbase.h"
+
+#include "paint-types.h"
+
+#include "gegl/gimp-gegl-utils.h"
+
+#include "core/gimp.h"
+#include "core/gimp-palettes.h"
+#include "core/gimpbrush.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpdynamics.h"
+#include "core/gimpgradient.h"
+#include "core/gimpimage.h"
+#include "core/gimppickable.h"
+#include "core/gimpsymmetry.h"
+#include "core/gimptempbuf.h"
+
+#include "gimppaintbrush.h"
+#include "gimppaintoptions.h"
+
+#include "gimp-intl.h"
+
+
+static void       gimp_paintbrush_paint                        (GimpPaintCore             *paint_core,
+                                                                GimpDrawable              *drawable,
+                                                                GimpPaintOptions          *paint_options,
+                                                                GimpSymmetry              *sym,
+                                                                GimpPaintState             paint_state,
+                                                                guint32                    time);
+
+static gboolean   gimp_paintbrush_real_get_color_history_color (GimpPaintbrush            *paintbrush,
+                                                                GimpDrawable              *drawable,
+                                                                GimpPaintOptions          *paint_options,
+                                                                GimpRGB                   *color);
+static void       gimp_paintbrush_real_get_paint_params        (GimpPaintbrush            *paintbrush,
+                                                                GimpDrawable              *drawable,
+                                                                GimpPaintOptions          *paint_options,
+                                                                GimpSymmetry              *sym,
+                                                                gdouble                    grad_point,
+                                                                GimpLayerMode             *paint_mode,
+                                                                GimpPaintApplicationMode  *paint_appl_mode,
+                                                                const GimpTempBuf        **paint_pixmap,
+                                                                GimpRGB                   *paint_color);
+
+
+G_DEFINE_TYPE (GimpPaintbrush, gimp_paintbrush, GIMP_TYPE_BRUSH_CORE)
+
+
+void
+gimp_paintbrush_register (Gimp                      *gimp,
+                          GimpPaintRegisterCallback  callback)
+{
+  (* callback) (gimp,
+                GIMP_TYPE_PAINTBRUSH,
+                GIMP_TYPE_PAINT_OPTIONS,
+                "gimp-paintbrush",
+                _("Paintbrush"),
+                "gimp-tool-paintbrush");
+}
+
+static void
+gimp_paintbrush_class_init (GimpPaintbrushClass *klass)
+{
+  GimpPaintCoreClass *paint_core_class = GIMP_PAINT_CORE_CLASS (klass);
+  GimpBrushCoreClass *brush_core_class = GIMP_BRUSH_CORE_CLASS (klass);
+
+  paint_core_class->paint                  = gimp_paintbrush_paint;
+
+  brush_core_class->handles_changing_brush = TRUE;
+
+  klass->get_color_history_color           = gimp_paintbrush_real_get_color_history_color;
+  klass->get_paint_params                  = gimp_paintbrush_real_get_paint_params;
+}
+
+static void
+gimp_paintbrush_init (GimpPaintbrush *paintbrush)
+{
+}
+
+static void
+gimp_paintbrush_paint (GimpPaintCore    *paint_core,
+                       GimpDrawable     *drawable,
+                       GimpPaintOptions *paint_options,
+                       GimpSymmetry     *sym,
+                       GimpPaintState    paint_state,
+                       guint32           time)
+{
+  GimpPaintbrush *paintbrush = GIMP_PAINTBRUSH (paint_core);
+
+  switch (paint_state)
+    {
+    case GIMP_PAINT_STATE_INIT:
+      {
+        GimpRGB color;
+
+        if (GIMP_PAINTBRUSH_GET_CLASS (paintbrush)->get_color_history_color &&
+            GIMP_PAINTBRUSH_GET_CLASS (paintbrush)->get_color_history_color (
+              paintbrush, drawable, paint_options, &color))
+          {
+            GimpContext *context = GIMP_CONTEXT (paint_options);
+
+            gimp_palettes_add_color_history (context->gimp, &color);
+          }
+      }
+      break;
+
+    case GIMP_PAINT_STATE_MOTION:
+      _gimp_paintbrush_motion (paint_core, drawable, paint_options,
+                               sym, GIMP_OPACITY_OPAQUE);
+      break;
+
+    case GIMP_PAINT_STATE_FINISH:
+      {
+        if (paintbrush->paint_buffer)
+          {
+            g_object_remove_weak_pointer (
+              G_OBJECT (paintbrush->paint_buffer),
+              (gpointer) &paintbrush->paint_buffer);
+
+            paintbrush->paint_buffer = NULL;
+          }
+
+        g_clear_pointer (&paintbrush->paint_pixmap, gimp_temp_buf_unref);
+      }
+      break;
+    }
+}
+
+static gboolean
+gimp_paintbrush_real_get_color_history_color (GimpPaintbrush   *paintbrush,
+                                              GimpDrawable     *drawable,
+                                              GimpPaintOptions *paint_options,
+                                              GimpRGB          *color)
+{
+  GimpContext   *context    = GIMP_CONTEXT (paint_options);
+  GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paintbrush);
+  GimpDynamics  *dynamics   = gimp_context_get_dynamics (context);
+
+  /* We don't save gradient color history and pixmap brushes
+   * have no color to save.
+   */
+  if (gimp_dynamics_is_output_enabled (dynamics, GIMP_DYNAMICS_OUTPUT_COLOR) ||
+      (brush_core->brush && gimp_brush_get_pixmap (brush_core->brush)))
+    {
+      return FALSE;
+    }
+
+  gimp_context_get_foreground (context, color);
+
+  return TRUE;
+}
+
+static void
+gimp_paintbrush_real_get_paint_params (GimpPaintbrush            *paintbrush,
+                                       GimpDrawable              *drawable,
+                                       GimpPaintOptions          *paint_options,
+                                       GimpSymmetry              *sym,
+                                       gdouble                    grad_point,
+                                       GimpLayerMode             *paint_mode,
+                                       GimpPaintApplicationMode  *paint_appl_mode,
+                                       const GimpTempBuf        **paint_pixmap,
+                                       GimpRGB                   *paint_color)
+{
+  GimpPaintCore *paint_core = GIMP_PAINT_CORE (paintbrush);
+  GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paintbrush);
+  GimpContext   *context    = GIMP_CONTEXT (paint_options);
+  GimpImage     *image      = gimp_item_get_image (GIMP_ITEM (drawable));
+
+  *paint_mode = gimp_context_get_paint_mode (context);
+
+  if (gimp_paint_options_get_gradient_color (paint_options, image,
+                                             grad_point,
+                                             paint_core->pixel_dist,
+                                             paint_color))
+    {
+      /* optionally take the color from the current gradient */
+      gimp_pickable_srgb_to_image_color (GIMP_PICKABLE (drawable),
+                                         paint_color, paint_color);
+
+      *paint_appl_mode = GIMP_PAINT_INCREMENTAL;
+    }
+  else if (brush_core->brush && gimp_brush_get_pixmap (brush_core->brush))
+    {
+      /* otherwise check if the brush has a pixmap and use that to
+       * color the area
+       */
+      *paint_pixmap = gimp_brush_core_get_brush_pixmap (brush_core);
+
+      *paint_appl_mode = GIMP_PAINT_INCREMENTAL;
+    }
+  else
+    {
+      /* otherwise fill the area with the foreground color */
+      gimp_context_get_foreground (context, paint_color);
+
+      gimp_pickable_srgb_to_image_color (GIMP_PICKABLE (drawable),
+                                         paint_color, paint_color);
+    }
+}
+
+void
+_gimp_paintbrush_motion (GimpPaintCore    *paint_core,
+                         GimpDrawable     *drawable,
+                         GimpPaintOptions *paint_options,
+                         GimpSymmetry     *sym,
+                         gdouble           opacity)
+{
+  GimpBrushCore    *brush_core = GIMP_BRUSH_CORE (paint_core);
+  GimpPaintbrush   *paintbrush = GIMP_PAINTBRUSH (paint_core);
+  GimpContext      *context    = GIMP_CONTEXT (paint_options);
+  GimpDynamics     *dynamics   = brush_core->dynamics;
+  GimpImage        *image      = gimp_item_get_image (GIMP_ITEM (drawable));
+  gdouble           fade_point;
+  gdouble           grad_point;
+  gdouble           force;
+  const GimpCoords *coords;
+  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);
+  /* Some settings are based on the original stroke. */
+  opacity *= gimp_dynamics_get_linear_value (dynamics,
+                                             GIMP_DYNAMICS_OUTPUT_OPACITY,
+                                             coords,
+                                             paint_options,
+                                             fade_point);
+  if (opacity == 0.0)
+    return;
+
+  if (GIMP_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
+    {
+      gimp_brush_core_eval_transform_dynamics (brush_core,
+                                               drawable,
+                                               paint_options,
+                                               coords);
+    }
+
+  grad_point = gimp_dynamics_get_linear_value (dynamics,
+                                               GIMP_DYNAMICS_OUTPUT_COLOR,
+                                               coords,
+                                               paint_options,
+                                               fade_point);
+
+  n_strokes = gimp_symmetry_get_size (sym);
+  for (i = 0; i < n_strokes; i++)
+    {
+      GimpLayerMode             paint_mode;
+      GimpPaintApplicationMode  paint_appl_mode;
+      GeglBuffer               *paint_buffer;
+      gint                      paint_buffer_x;
+      gint                      paint_buffer_y;
+      const GimpTempBuf        *paint_pixmap = NULL;
+      GimpRGB                   paint_color;
+      gint                      paint_width, paint_height;
+
+      paint_appl_mode = paint_options->application_mode;
+
+      GIMP_PAINTBRUSH_GET_CLASS (paintbrush)->get_paint_params (paintbrush,
+                                                                drawable,
+                                                                paint_options,
+                                                                sym,
+                                                                grad_point,
+                                                                &paint_mode,
+                                                                &paint_appl_mode,
+                                                                &paint_pixmap,
+                                                                &paint_color);
+
+      coords = gimp_symmetry_get_coords (sym, i);
+
+      if (GIMP_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
+        gimp_brush_core_eval_transform_symmetry (brush_core, sym, i);
+
+      paint_buffer = gimp_paint_core_get_paint_buffer (paint_core, drawable,
+                                                       paint_options,
+                                                       paint_mode,
+                                                       coords,
+                                                       &paint_buffer_x,
+                                                       &paint_buffer_y,
+                                                       &paint_width,
+                                                       &paint_height);
+      if (! paint_buffer)
+        continue;
+
+      if (! paint_pixmap)
+        {
+          opacity *= paint_color.a;
+          gimp_rgb_set_alpha (&paint_color, GIMP_OPACITY_OPAQUE);
+        }
+
+      /* fill the paint buffer.  we can skip this step when reusing the
+       * previous paint buffer, if the paint color/pixmap hasn't changed
+       * (unless using an applicator, which currently modifies the paint buffer
+       * in-place).
+       */
+      if (paint_core->applicator                   ||
+          paint_buffer != paintbrush->paint_buffer ||
+          paint_pixmap != paintbrush->paint_pixmap ||
+          (! paint_pixmap && (gimp_rgba_distance (&paint_color,
+                                                  &paintbrush->paint_color))))
+        {
+          if (paint_buffer != paintbrush->paint_buffer)
+            {
+              if (paintbrush->paint_buffer)
+                {
+                  g_object_remove_weak_pointer (
+                    G_OBJECT (paintbrush->paint_buffer),
+                    (gpointer) &paintbrush->paint_buffer);
+                }
+
+              paintbrush->paint_buffer = paint_buffer;
+
+              g_object_add_weak_pointer (
+                G_OBJECT (paintbrush->paint_buffer),
+                (gpointer) &paintbrush->paint_buffer);
+            }
+
+          if (paint_pixmap != paintbrush->paint_pixmap)
+            {
+              g_clear_pointer (&paintbrush->paint_pixmap, gimp_temp_buf_unref);
+
+              if (paint_pixmap)
+                paintbrush->paint_pixmap = gimp_temp_buf_ref (paint_pixmap);
+            }
+
+          paintbrush->paint_color = paint_color;
+
+          if (paint_pixmap)
+            {
+              gimp_brush_core_color_area_with_pixmap (brush_core, drawable,
+                                                      coords,
+                                                      paint_buffer,
+                                                      paint_buffer_x,
+                                                      paint_buffer_y,
+                                                      FALSE);
+            }
+          else
+            {
+              GeglColor *color;
+
+              color = gimp_gegl_color_new (&paint_color);
+
+              gegl_buffer_set_color (paint_buffer, NULL, color);
+
+              g_object_unref (color);
+            }
+        }
+
+      if (gimp_dynamics_is_output_enabled (dynamics, GIMP_DYNAMICS_OUTPUT_FORCE))
+        force = gimp_dynamics_get_linear_value (dynamics,
+                                                GIMP_DYNAMICS_OUTPUT_FORCE,
+                                                coords,
+                                                paint_options,
+                                                fade_point);
+      else
+        force = paint_options->brush_force;
+
+      /* finally, let the brush core paste the colored area on the canvas */
+      gimp_brush_core_paste_canvas (brush_core, drawable,
+                                    coords,
+                                    MIN (opacity, GIMP_OPACITY_OPAQUE),
+                                    gimp_context_get_opacity (context),
+                                    paint_mode,
+                                    gimp_paint_options_get_brush_mode (paint_options),
+                                    force,
+                                    paint_appl_mode);
+    }
+}