Adding upstream version 2.10.22.upstream/2.10.22upstream

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

1 files changed, 760 insertions, 0 deletions

diff --git a/app/display/gimpcanvaslimit.c b/app/display/gimpcanvaslimit.c
new file mode 100644
index 0000000..05dacbb
--- /dev/null
+++ b/app/display/gimpcanvaslimit.c
@@ -0,0 +1,760 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvaslimit.c
+ * Copyright (C) 2020 Ell
+ *
+ * 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 <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "display-types.h"
+
+#include "core/gimp-cairo.h"
+
+#include "gimpcanvaslimit.h"
+#include "gimpdisplayshell.h"
+
+
+#define DASH_LENGTH   4.0
+#define HIT_DISTANCE 16.0
+
+
+enum
+{
+  PROP_0,
+  PROP_TYPE,
+  PROP_X,
+  PROP_Y,
+  PROP_RADIUS,
+  PROP_ASPECT_RATIO,
+  PROP_ANGLE,
+  PROP_DASHED
+};
+
+
+typedef struct _GimpCanvasLimitPrivate GimpCanvasLimitPrivate;
+
+struct _GimpCanvasLimitPrivate
+{
+  GimpLimitType type;
+
+  gdouble       x;
+  gdouble       y;
+  gdouble       radius;
+  gdouble       aspect_ratio;
+  gdouble       angle;
+
+  gboolean      dashed;
+};
+
+#define GET_PRIVATE(limit) \
+        ((GimpCanvasLimitPrivate *) gimp_canvas_limit_get_instance_private ((GimpCanvasLimit *) (limit)))
+
+
+/*  local function prototypes  */
+
+static void             gimp_canvas_limit_set_property (GObject        *object,
+                                                        guint           property_id,
+                                                        const GValue   *value,
+                                                        GParamSpec     *pspec);
+static void             gimp_canvas_limit_get_property (GObject        *object,
+                                                        guint           property_id,
+                                                        GValue         *value,
+                                                        GParamSpec     *pspec);
+
+static void             gimp_canvas_limit_draw         (GimpCanvasItem *item,
+                                                        cairo_t        *cr);
+static cairo_region_t * gimp_canvas_limit_get_extents  (GimpCanvasItem *item);
+static gboolean         gimp_canvas_limit_hit          (GimpCanvasItem *item,
+                                                        gdouble         x,
+                                                        gdouble         y);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasLimit, gimp_canvas_limit,
+                            GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_limit_parent_class
+
+
+/*  private functions  */
+
+static void
+gimp_canvas_limit_class_init (GimpCanvasLimitClass *klass)
+{
+  GObjectClass        *object_class = G_OBJECT_CLASS (klass);
+  GimpCanvasItemClass *item_class   = GIMP_CANVAS_ITEM_CLASS (klass);
+
+  object_class->set_property = gimp_canvas_limit_set_property;
+  object_class->get_property = gimp_canvas_limit_get_property;
+
+  item_class->draw           = gimp_canvas_limit_draw;
+  item_class->get_extents    = gimp_canvas_limit_get_extents;
+  item_class->hit            = gimp_canvas_limit_hit;
+
+  g_object_class_install_property (object_class, PROP_TYPE,
+                                   g_param_spec_enum ("type", NULL, NULL,
+                                                      GIMP_TYPE_LIMIT_TYPE,
+                                                      GIMP_LIMIT_CIRCLE,
+                                                      GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_X,
+                                   g_param_spec_double ("x", NULL, NULL,
+                                                        -G_MAXDOUBLE,
+                                                        +G_MAXDOUBLE,
+                                                        0.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_Y,
+                                   g_param_spec_double ("y", NULL, NULL,
+                                                        -G_MAXDOUBLE,
+                                                        +G_MAXDOUBLE,
+                                                        0.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_RADIUS,
+                                   g_param_spec_double ("radius", NULL, NULL,
+                                                        0.0,
+                                                        +G_MAXDOUBLE,
+                                                        0.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_ASPECT_RATIO,
+                                   g_param_spec_double ("aspect-ratio", NULL, NULL,
+                                                        -1.0,
+                                                        +1.0,
+                                                        0.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_ANGLE,
+                                   g_param_spec_double ("angle", NULL, NULL,
+                                                        -G_MAXDOUBLE,
+                                                        +G_MAXDOUBLE,
+                                                        0.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_DASHED,
+                                   g_param_spec_boolean ("dashed", NULL, NULL,
+                                                         FALSE,
+                                                         GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_limit_init (GimpCanvasLimit *limit)
+{
+}
+
+static void
+gimp_canvas_limit_set_property (GObject      *object,
+                                guint         property_id,
+                                const GValue *value,
+                                GParamSpec   *pspec)
+{
+  GimpCanvasLimitPrivate *priv = GET_PRIVATE (object);
+
+  switch (property_id)
+    {
+    case PROP_TYPE:
+      priv->type = g_value_get_enum (value);
+      break;
+
+    case PROP_X:
+      priv->x = g_value_get_double (value);
+      break;
+
+    case PROP_Y:
+      priv->y = g_value_get_double (value);
+      break;
+
+    case PROP_RADIUS:
+      priv->radius = g_value_get_double (value);
+      break;
+
+    case PROP_ASPECT_RATIO:
+      priv->aspect_ratio = g_value_get_double (value);
+      break;
+
+    case PROP_ANGLE:
+      priv->angle = g_value_get_double (value);
+      break;
+
+    case PROP_DASHED:
+      priv->dashed = g_value_get_boolean (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_canvas_limit_get_property (GObject    *object,
+                                guint       property_id,
+                                GValue     *value,
+                                GParamSpec *pspec)
+{
+  GimpCanvasLimitPrivate *priv = GET_PRIVATE (object);
+
+  switch (property_id)
+    {
+    case PROP_TYPE:
+      g_value_set_enum (value, priv->type);
+      break;
+
+    case PROP_X:
+      g_value_set_double (value, priv->x);
+      break;
+
+    case PROP_Y:
+      g_value_set_double (value, priv->y);
+      break;
+
+    case PROP_RADIUS:
+      g_value_set_double (value, priv->radius);
+      break;
+
+    case PROP_ASPECT_RATIO:
+      g_value_set_double (value, priv->aspect_ratio);
+      break;
+
+    case PROP_ANGLE:
+      g_value_set_double (value, priv->angle);
+      break;
+
+    case PROP_DASHED:
+      g_value_set_boolean (value, priv->dashed);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_canvas_limit_transform (GimpCanvasItem *item,
+                             gdouble        *x,
+                             gdouble        *y,
+                             gdouble        *rx,
+                             gdouble        *ry)
+{
+  GimpCanvasLimit        *limit      = GIMP_CANVAS_LIMIT (item);
+  GimpCanvasLimitPrivate *priv       = GET_PRIVATE (item);
+  gdouble                 x1, y1;
+  gdouble                 x2, y2;
+  gdouble                 min_radius = 0.0;
+
+  gimp_canvas_limit_get_radii (limit, rx, ry);
+
+  gimp_canvas_item_transform_xy_f (item,
+                                   priv->x - *rx, priv->y - *ry,
+                                   &x1,           &y1);
+  gimp_canvas_item_transform_xy_f (item,
+                                   priv->x + *rx, priv->y + *ry,
+                                   &x2,           &y2);
+
+  x1  = floor (x1) + 0.5;
+  y1  = floor (y1) + 0.5;
+
+  x2  = floor (x2) + 0.5;
+  y2  = floor (y2) + 0.5;
+
+  *x  = (x1 + x2) / 2.0;
+  *y  = (y1 + y2) / 2.0;
+
+  *rx = (x2 - x1) / 2.0;
+  *ry = (y2 - y1) / 2.0;
+
+  switch (priv->type)
+    {
+    case GIMP_LIMIT_CIRCLE:
+    case GIMP_LIMIT_SQUARE:
+      min_radius = 2.0;
+      break;
+
+    case GIMP_LIMIT_DIAMOND:
+      min_radius = 3.0;
+      break;
+
+    case GIMP_LIMIT_HORIZONTAL:
+    case GIMP_LIMIT_VERTICAL:
+      min_radius = 1.0;
+      break;
+    }
+
+  *rx = MAX (*rx, min_radius);
+  *ry = MAX (*ry, min_radius);
+}
+
+static void
+gimp_canvas_limit_paint (GimpCanvasItem *item,
+                         cairo_t        *cr)
+{
+  GimpCanvasLimitPrivate *priv  = GET_PRIVATE (item);
+  GimpDisplayShell       *shell = gimp_canvas_item_get_shell (item);
+  gdouble                 x,  y;
+  gdouble                 rx, ry;
+  gdouble                 inf;
+
+  gimp_canvas_limit_transform (item,
+                               &x,  &y,
+                               &rx, &ry);
+
+  cairo_save (cr);
+
+  cairo_translate (cr, x,  y);
+  cairo_rotate    (cr, priv->angle);
+  cairo_scale     (cr, rx, ry);
+
+  inf = MAX (x, shell->disp_width  - x) +
+        MAX (y, shell->disp_height - y);
+
+  switch (priv->type)
+    {
+    case GIMP_LIMIT_CIRCLE:
+      cairo_arc (cr, 0.0, 0.0, 1.0, 0.0, 2.0 * G_PI);
+      break;
+
+    case GIMP_LIMIT_SQUARE:
+      cairo_rectangle (cr, -1.0, -1.0, 2.0, 2.0);
+      break;
+
+    case GIMP_LIMIT_DIAMOND:
+      cairo_move_to (cr,  0.0, -1.0);
+      cairo_line_to (cr, +1.0,  0.0);
+      cairo_line_to (cr,  0.0, +1.0);
+      cairo_line_to (cr, -1.0,  0.0);
+      cairo_close_path (cr);
+      break;
+
+    case GIMP_LIMIT_HORIZONTAL:
+      cairo_move_to (cr, -inf / rx, -1.0);
+      cairo_line_to (cr, +inf / rx, -1.0);
+
+      cairo_move_to (cr, -inf / rx, +1.0);
+      cairo_line_to (cr, +inf / rx, +1.0);
+      break;
+
+    case GIMP_LIMIT_VERTICAL:
+      cairo_move_to (cr, -1.0, -inf / ry);
+      cairo_line_to (cr, -1.0, +inf / ry);
+
+      cairo_move_to (cr, +1.0, -inf / ry);
+      cairo_line_to (cr, +1.0, +inf / ry);
+      break;
+    }
+
+  cairo_restore (cr);
+}
+
+static void
+gimp_canvas_limit_draw (GimpCanvasItem *item,
+                        cairo_t        *cr)
+{
+  GimpCanvasLimitPrivate *priv = GET_PRIVATE (item);
+
+  gimp_canvas_limit_paint (item, cr);
+
+  cairo_save (cr);
+
+  if (priv->dashed)
+    cairo_set_dash (cr, (const gdouble[]) {DASH_LENGTH}, 1, 0.0);
+
+  _gimp_canvas_item_stroke (item, cr);
+
+  cairo_restore (cr);
+}
+
+static cairo_region_t *
+gimp_canvas_limit_get_extents (GimpCanvasItem *item)
+{
+  cairo_t               *cr;
+  cairo_surface_t       *surface;
+  cairo_rectangle_int_t  rectangle;
+  gdouble                x1, y1;
+  gdouble                x2, y2;
+
+  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
+
+  cr = cairo_create (surface);
+
+  gimp_canvas_limit_paint (item, cr);
+
+  cairo_path_extents (cr,
+                      &x1, &y1,
+                      &x2, &y2);
+
+  cairo_destroy (cr);
+
+  cairo_surface_destroy (surface);
+
+  rectangle.x      = floor (x1 - 1.5);
+  rectangle.y      = floor (y1 - 1.5);
+  rectangle.width  = ceil  (x2 + 1.5) - rectangle.x;
+  rectangle.height = ceil  (y2 + 1.5) - rectangle.y;
+
+  return cairo_region_create_rectangle (&rectangle);
+}
+
+static gboolean
+gimp_canvas_limit_hit (GimpCanvasItem *item,
+                       gdouble         x,
+                       gdouble         y)
+{
+  GimpCanvasLimit *limit = GIMP_CANVAS_LIMIT (item);
+  gdouble          bx, by;
+
+  gimp_canvas_limit_boundary_point (limit,
+                                    x,   y,
+                                    &bx, &by);
+
+  return gimp_canvas_item_transform_distance (item,
+                                              x,  y,
+                                              bx, by) <= HIT_DISTANCE;
+}
+
+
+/*  public functions  */
+
+GimpCanvasItem *
+gimp_canvas_limit_new (GimpDisplayShell *shell,
+                       GimpLimitType     type,
+                       gdouble           x,
+                       gdouble           y,
+                       gdouble           radius,
+                       gdouble           aspect_ratio,
+                       gdouble           angle,
+                       gboolean          dashed)
+{
+  g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+
+  return g_object_new (GIMP_TYPE_CANVAS_LIMIT,
+                       "shell",        shell,
+                       "type",         type,
+                       "x",            x,
+                       "y",            y,
+                       "radius",       radius,
+                       "aspect-ratio", aspect_ratio,
+                       "angle",        angle,
+                       "dashed",       dashed,
+                       NULL);
+}
+
+void
+gimp_canvas_limit_get_radii (GimpCanvasLimit  *limit,
+                             gdouble          *rx,
+                             gdouble          *ry)
+{
+  GimpCanvasLimitPrivate *priv;
+
+  g_return_if_fail (GIMP_IS_CANVAS_LIMIT (limit));
+
+  priv = GET_PRIVATE (limit);
+
+  if (priv->aspect_ratio >= 0.0)
+    {
+      if (rx) *rx = priv->radius;
+      if (ry) *ry = priv->radius * (1.0 - priv->aspect_ratio);
+    }
+  else
+    {
+      if (rx) *rx = priv->radius * (1.0 + priv->aspect_ratio);
+      if (ry) *ry = priv->radius;
+    }
+}
+
+gboolean
+gimp_canvas_limit_is_inside (GimpCanvasLimit *limit,
+                             gdouble          x,
+                             gdouble          y)
+{
+  GimpCanvasLimitPrivate *priv;
+  GimpVector2             p;
+  gdouble                 rx, ry;
+
+  g_return_val_if_fail (GIMP_IS_CANVAS_LIMIT (limit), FALSE);
+
+  priv = GET_PRIVATE (limit);
+
+  gimp_canvas_limit_get_radii (limit, &rx, &ry);
+
+  if (rx == 0.0 || ry == 0.0)
+    return FALSE;
+
+  p.x = x - priv->x;
+  p.y = y - priv->y;
+
+  gimp_vector2_rotate (&p, +priv->angle);
+
+  p.x = fabs (p.x / rx);
+  p.y = fabs (p.y / ry);
+
+  switch (priv->type)
+    {
+    case GIMP_LIMIT_CIRCLE:
+      return gimp_vector2_length (&p) < 1.0;
+
+    case GIMP_LIMIT_SQUARE:
+      return p.x < 1.0 && p.y < 1.0;
+
+    case GIMP_LIMIT_DIAMOND:
+      return p.x + p.y < 1.0;
+
+    case GIMP_LIMIT_HORIZONTAL:
+      return p.y < 1.0;
+
+    case GIMP_LIMIT_VERTICAL:
+      return p.x < 1.0;
+    }
+
+  g_return_val_if_reached (FALSE);
+}
+
+void
+gimp_canvas_limit_boundary_point (GimpCanvasLimit *limit,
+                                  gdouble          x,
+                                  gdouble          y,
+                                  gdouble         *bx,
+                                  gdouble         *by)
+{
+  GimpCanvasLimitPrivate *priv;
+  GimpVector2             p;
+  gdouble                 rx, ry;
+  gboolean                flip_x = FALSE;
+  gboolean                flip_y = FALSE;
+
+  g_return_if_fail (GIMP_IS_CANVAS_LIMIT (limit));
+  g_return_if_fail (bx != NULL);
+  g_return_if_fail (by != NULL);
+
+  priv = GET_PRIVATE (limit);
+
+  gimp_canvas_limit_get_radii (limit, &rx, &ry);
+
+  p.x = x - priv->x;
+  p.y = y - priv->y;
+
+  gimp_vector2_rotate (&p, +priv->angle);
+
+  if (p.x < 0.0)
+    {
+      p.x = -p.x;
+
+      flip_x = TRUE;
+    }
+
+  if (p.y < 0.0)
+    {
+      p.y = -p.y;
+
+      flip_y = TRUE;
+    }
+
+  switch (priv->type)
+    {
+    case GIMP_LIMIT_CIRCLE:
+      if (rx == ry)
+        {
+          gimp_vector2_normalize (&p);
+
+          gimp_vector2_mul (&p, rx);
+        }
+      else
+        {
+          gdouble a0 = 0.0;
+          gdouble a1 = G_PI / 2.0;
+          gdouble a;
+          gint    i;
+
+          for (i = 0; i < 20; i++)
+            {
+              GimpVector2 r;
+              GimpVector2 n;
+
+              a = (a0 + a1) / 2.0;
+
+              r.x = p.x - rx * cos (a);
+              r.y = p.y - ry * sin (a);
+
+              n.x = 1.0;
+              n.y = tan (a) * rx / ry;
+
+              if (gimp_vector2_cross_product (&r, &n).x >= 0.0)
+                a1 = a;
+              else
+                a0 = a;
+            }
+
+          a = (a0 + a1) / 2.0;
+
+          p.x = rx * cos (a);
+          p.y = ry * sin (a);
+        }
+      break;
+
+    case GIMP_LIMIT_SQUARE:
+      if (p.x <= rx || p.y <= ry)
+        {
+          if (rx - p.x <= ry - p.y)
+            p.x = rx;
+          else
+            p.y = ry;
+        }
+      else
+        {
+          p.x = rx;
+          p.y = ry;
+        }
+      break;
+
+    case GIMP_LIMIT_DIAMOND:
+      {
+        GimpVector2 l;
+        GimpVector2 r;
+        gdouble     t;
+
+        l.x = rx;
+        l.y = -ry;
+
+        r.x = p.x;
+        r.y = p.y - ry;
+
+        t = gimp_vector2_inner_product (&r, &l) /
+            gimp_vector2_inner_product (&l, &l);
+        t = CLAMP (t, 0.0, 1.0);
+
+        p.x = rx * t;
+        p.y = ry * (1.0 - t);
+      }
+      break;
+
+    case GIMP_LIMIT_HORIZONTAL:
+      p.y = ry;
+      break;
+
+    case GIMP_LIMIT_VERTICAL:
+      p.x = rx;
+      break;
+    }
+
+  if (flip_x)
+    p.x = -p.x;
+
+  if (flip_y)
+    p.y = -p.y;
+
+  gimp_vector2_rotate (&p, -priv->angle);
+
+  *bx = priv->x + p.x;
+  *by = priv->y + p.y;
+}
+
+gdouble
+gimp_canvas_limit_boundary_radius (GimpCanvasLimit *limit,
+                                   gdouble          x,
+                                   gdouble          y)
+{
+  GimpCanvasLimitPrivate *priv;
+  GimpVector2             p;
+
+  g_return_val_if_fail (GIMP_IS_CANVAS_LIMIT (limit), 0.0);
+
+  priv = GET_PRIVATE (limit);
+
+  p.x = x - priv->x;
+  p.y = y - priv->y;
+
+  gimp_vector2_rotate (&p, +priv->angle);
+
+  p.x = fabs (p.x);
+  p.y = fabs (p.y);
+
+  if (priv->aspect_ratio >= 0.0)
+    p.y /= 1.0 - priv->aspect_ratio;
+  else
+    p.x /= 1.0 + priv->aspect_ratio;
+
+  switch (priv->type)
+    {
+    case GIMP_LIMIT_CIRCLE:
+      return gimp_vector2_length (&p);
+
+    case GIMP_LIMIT_SQUARE:
+      return MAX (p.x, p.y);
+
+    case GIMP_LIMIT_DIAMOND:
+      return p.x + p.y;
+
+    case GIMP_LIMIT_HORIZONTAL:
+      return p.y;
+
+    case GIMP_LIMIT_VERTICAL:
+      return p.x;
+    }
+
+  g_return_val_if_reached (0.0);
+}
+
+void
+gimp_canvas_limit_center_point (GimpCanvasLimit *limit,
+                                gdouble          x,
+                                gdouble          y,
+                                gdouble         *cx,
+                                gdouble         *cy)
+{
+  GimpCanvasLimitPrivate *priv;
+  GimpVector2             p;
+
+  g_return_if_fail (GIMP_IS_CANVAS_LIMIT (limit));
+  g_return_if_fail (cx != NULL);
+  g_return_if_fail (cy != NULL);
+
+  priv = GET_PRIVATE (limit);
+
+  p.x = x - priv->x;
+  p.y = y - priv->y;
+
+  gimp_vector2_rotate (&p, +priv->angle);
+
+  switch (priv->type)
+    {
+    case GIMP_LIMIT_CIRCLE:
+    case GIMP_LIMIT_SQUARE:
+    case GIMP_LIMIT_DIAMOND:
+      p.x = 0.0;
+      p.y = 0.0;
+      break;
+
+    case GIMP_LIMIT_HORIZONTAL:
+      p.y = 0.0;
+      break;
+
+    case GIMP_LIMIT_VERTICAL:
+      p.x = 0.0;
+      break;
+    }
+
+  gimp_vector2_rotate (&p, -priv->angle);
+
+  *cx = priv->x + p.x;
+  *cy = priv->y + p.y;
+}