Adding upstream version 2.10.22.upstream/2.10.22upstream

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

1 files changed, 683 insertions, 0 deletions

diff --git a/app/display/gimpcanvastransformguides.c b/app/display/gimpcanvastransformguides.c
new file mode 100644
index 0000000..ba6c4cb
--- /dev/null
+++ b/app/display/gimpcanvastransformguides.c
@@ -0,0 +1,683 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvastransformguides.c
+ * Copyright (C) 2011 Michael Natterer <mitch@gimp.org>
+ *
+ * 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-transform-utils.h"
+#include "core/gimp-utils.h"
+
+#include "gimpcanvastransformguides.h"
+#include "gimpdisplayshell.h"
+
+
+#define SQRT5 2.236067977
+
+
+enum
+{
+  PROP_0,
+  PROP_TRANSFORM,
+  PROP_X1,
+  PROP_Y1,
+  PROP_X2,
+  PROP_Y2,
+  PROP_TYPE,
+  PROP_N_GUIDES,
+  PROP_CLIP
+};
+
+
+typedef struct _GimpCanvasTransformGuidesPrivate GimpCanvasTransformGuidesPrivate;
+
+struct _GimpCanvasTransformGuidesPrivate
+{
+  GimpMatrix3    transform;
+  gdouble        x1, y1;
+  gdouble        x2, y2;
+  GimpGuidesType type;
+  gint           n_guides;
+  gboolean       clip;
+};
+
+#define GET_PRIVATE(transform) \
+        ((GimpCanvasTransformGuidesPrivate *) gimp_canvas_transform_guides_get_instance_private ((GimpCanvasTransformGuides *) (transform)))
+
+
+/*  local function prototypes  */
+
+static void             gimp_canvas_transform_guides_set_property (GObject        *object,
+                                                                   guint           property_id,
+                                                                   const GValue   *value,
+                                                                   GParamSpec     *pspec);
+static void             gimp_canvas_transform_guides_get_property (GObject        *object,
+                                                                   guint           property_id,
+                                                                   GValue         *value,
+                                                                   GParamSpec     *pspec);
+static void             gimp_canvas_transform_guides_draw         (GimpCanvasItem *item,
+                                                                   cairo_t        *cr);
+static cairo_region_t * gimp_canvas_transform_guides_get_extents  (GimpCanvasItem *item);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasTransformGuides,
+                            gimp_canvas_transform_guides, GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_transform_guides_parent_class
+
+
+static void
+gimp_canvas_transform_guides_class_init (GimpCanvasTransformGuidesClass *klass)
+{
+  GObjectClass        *object_class = G_OBJECT_CLASS (klass);
+  GimpCanvasItemClass *item_class   = GIMP_CANVAS_ITEM_CLASS (klass);
+
+  object_class->set_property = gimp_canvas_transform_guides_set_property;
+  object_class->get_property = gimp_canvas_transform_guides_get_property;
+
+  item_class->draw           = gimp_canvas_transform_guides_draw;
+  item_class->get_extents    = gimp_canvas_transform_guides_get_extents;
+
+  g_object_class_install_property (object_class, PROP_TRANSFORM,
+                                   gimp_param_spec_matrix3 ("transform",
+                                                            NULL, NULL,
+                                                            NULL,
+                                                            GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_X1,
+                                   g_param_spec_double ("x1",
+                                                        NULL, NULL,
+                                                        -GIMP_MAX_IMAGE_SIZE,
+                                                        GIMP_MAX_IMAGE_SIZE,
+                                                        0.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_Y1,
+                                   g_param_spec_double ("y1",
+                                                        NULL, NULL,
+                                                        -GIMP_MAX_IMAGE_SIZE,
+                                                        GIMP_MAX_IMAGE_SIZE,
+                                                        0.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_X2,
+                                   g_param_spec_double ("x2",
+                                                        NULL, NULL,
+                                                        -GIMP_MAX_IMAGE_SIZE,
+                                                        GIMP_MAX_IMAGE_SIZE,
+                                                        0.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_Y2,
+                                   g_param_spec_double ("y2",
+                                                        NULL, NULL,
+                                                        -GIMP_MAX_IMAGE_SIZE,
+                                                        GIMP_MAX_IMAGE_SIZE,
+                                                        0.0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_TYPE,
+                                   g_param_spec_enum ("type", NULL, NULL,
+                                                      GIMP_TYPE_GUIDES_TYPE,
+                                                      GIMP_GUIDES_NONE,
+                                                      GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_N_GUIDES,
+                                   g_param_spec_int ("n-guides", NULL, NULL,
+                                                     1, 128, 4,
+                                                     GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_CLIP,
+                                   g_param_spec_boolean ("clip", NULL, NULL,
+                                                         FALSE,
+                                                         GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_transform_guides_init (GimpCanvasTransformGuides *transform)
+{
+}
+
+static void
+gimp_canvas_transform_guides_set_property (GObject      *object,
+                                           guint         property_id,
+                                           const GValue *value,
+                                           GParamSpec   *pspec)
+{
+  GimpCanvasTransformGuidesPrivate *private = GET_PRIVATE (object);
+
+  switch (property_id)
+    {
+    case PROP_TRANSFORM:
+      {
+        GimpMatrix3 *transform = g_value_get_boxed (value);
+
+        if (transform)
+          private->transform = *transform;
+        else
+          gimp_matrix3_identity (&private->transform);
+      }
+      break;
+
+    case PROP_X1:
+      private->x1 = g_value_get_double (value);
+      break;
+
+    case PROP_Y1:
+      private->y1 = g_value_get_double (value);
+      break;
+
+    case PROP_X2:
+      private->x2 = g_value_get_double (value);
+      break;
+
+    case PROP_Y2:
+      private->y2 = g_value_get_double (value);
+      break;
+
+    case PROP_TYPE:
+      private->type = g_value_get_enum (value);
+      break;
+
+    case PROP_N_GUIDES:
+      private->n_guides = g_value_get_int (value);
+      break;
+
+    case PROP_CLIP:
+      private->clip = g_value_get_boolean (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_canvas_transform_guides_get_property (GObject    *object,
+                                           guint       property_id,
+                                           GValue     *value,
+                                           GParamSpec *pspec)
+{
+  GimpCanvasTransformGuidesPrivate *private = GET_PRIVATE (object);
+
+  switch (property_id)
+    {
+    case PROP_TRANSFORM:
+      g_value_set_boxed (value, &private->transform);
+      break;
+
+    case PROP_X1:
+      g_value_set_double (value, private->x1);
+      break;
+
+    case PROP_Y1:
+      g_value_set_double (value, private->y1);
+      break;
+
+    case PROP_X2:
+      g_value_set_double (value, private->x2);
+      break;
+
+    case PROP_Y2:
+      g_value_set_double (value, private->y2);
+      break;
+
+    case PROP_TYPE:
+      g_value_set_enum (value, private->type);
+      break;
+
+    case PROP_N_GUIDES:
+      g_value_set_int (value, private->n_guides);
+      break;
+
+    case PROP_CLIP:
+      g_value_set_boolean (value, private->clip);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static gboolean
+gimp_canvas_transform_guides_transform (GimpCanvasItem *item,
+                                        GimpVector2    *t_vertices,
+                                        gint           *n_t_vertices)
+{
+  GimpCanvasTransformGuidesPrivate *private = GET_PRIVATE (item);
+  GimpVector2                       vertices[4];
+
+  vertices[0] = (GimpVector2) { private->x1, private->y1 };
+  vertices[1] = (GimpVector2) { private->x2, private->y1 };
+  vertices[2] = (GimpVector2) { private->x2, private->y2 };
+  vertices[3] = (GimpVector2) { private->x1, private->y2 };
+
+  if (private->clip)
+    {
+      gimp_transform_polygon (&private->transform, vertices, 4, TRUE,
+                              t_vertices, n_t_vertices);
+
+      return TRUE;
+    }
+  else
+    {
+      gint i;
+
+      for (i = 0; i < 4; i++)
+        {
+          gimp_matrix3_transform_point (&private->transform,
+                                        vertices[i].x,    vertices[i].y,
+                                        &t_vertices[i].x, &t_vertices[i].y);
+        }
+
+      *n_t_vertices = 4;
+
+      return gimp_transform_polygon_is_convex (t_vertices[0].x, t_vertices[0].y,
+                                               t_vertices[1].x, t_vertices[1].y,
+                                               t_vertices[3].x, t_vertices[3].y,
+                                               t_vertices[2].x, t_vertices[2].y);
+    }
+}
+
+static void
+draw_line (cairo_t        *cr,
+           GimpCanvasItem *item,
+           GimpMatrix3    *transform,
+           gdouble         x1,
+           gdouble         y1,
+           gdouble         x2,
+           gdouble         y2)
+{
+  GimpCanvasTransformGuidesPrivate *private = GET_PRIVATE (item);
+  GimpVector2                       vertices[2];
+  GimpVector2                       t_vertices[2];
+  gint                              n_t_vertices;
+
+  vertices[0] = (GimpVector2) { x1, y1 };
+  vertices[1] = (GimpVector2) { x2, y2 };
+
+  if (private->clip)
+    {
+      gimp_transform_polygon (transform, vertices, 2, FALSE,
+                              t_vertices, &n_t_vertices);
+    }
+  else
+    {
+      gint i;
+
+      for (i = 0; i < 2; i++)
+        {
+          gimp_matrix3_transform_point (transform,
+                                        vertices[i].x,    vertices[i].y,
+                                        &t_vertices[i].x, &t_vertices[i].y);
+        }
+
+      n_t_vertices = 2;
+    }
+
+  if (n_t_vertices == 2)
+    {
+      gint i;
+
+      for (i = 0; i < 2; i++)
+        {
+          GimpVector2 v;
+
+          gimp_canvas_item_transform_xy_f (item,
+                                           t_vertices[i].x, t_vertices[i].y,
+                                           &v.x,            &v.y);
+
+          v.x = floor (v.x) + 0.5;
+          v.y = floor (v.y) + 0.5;
+
+          if (i == 0)
+            cairo_move_to (cr, v.x, v.y);
+          else
+            cairo_line_to (cr, v.x, v.y);
+        }
+    }
+}
+
+static void
+draw_hline (cairo_t        *cr,
+            GimpCanvasItem *item,
+            GimpMatrix3    *transform,
+            gdouble         x1,
+            gdouble         x2,
+            gdouble         y)
+{
+  draw_line (cr, item, transform, x1, y, x2, y);
+}
+
+static void
+draw_vline (cairo_t        *cr,
+            GimpCanvasItem *item,
+            GimpMatrix3    *transform,
+            gdouble         y1,
+            gdouble         y2,
+            gdouble         x)
+{
+  draw_line (cr, item, transform, x, y1, x, y2);
+}
+
+static void
+gimp_canvas_transform_guides_draw (GimpCanvasItem *item,
+                                   cairo_t        *cr)
+{
+  GimpCanvasTransformGuidesPrivate *private = GET_PRIVATE (item);
+  GimpVector2                       t_vertices[5];
+  gint                              n_t_vertices;
+  gboolean                          convex;
+  gint                              i;
+
+  convex = gimp_canvas_transform_guides_transform (item,
+                                                   t_vertices, &n_t_vertices);
+
+  if (n_t_vertices < 2)
+    return;
+
+  for (i = 0; i < n_t_vertices; i++)
+    {
+      GimpVector2 v;
+
+      gimp_canvas_item_transform_xy_f (item, t_vertices[i].x, t_vertices[i].y,
+                                       &v.x, &v.y);
+
+      v.x = floor (v.x) + 0.5;
+      v.y = floor (v.y) + 0.5;
+
+      if (i == 0)
+        cairo_move_to (cr, v.x, v.y);
+      else
+        cairo_line_to (cr, v.x, v.y);
+    }
+
+  cairo_close_path (cr);
+
+  if (! convex || n_t_vertices < 3)
+    {
+      _gimp_canvas_item_stroke (item, cr);
+      return;
+    }
+
+  switch (private->type)
+    {
+    case GIMP_GUIDES_NONE:
+      break;
+
+    case GIMP_GUIDES_CENTER_LINES:
+      draw_hline (cr, item, &private->transform,
+                  private->x1, private->x2, (private->y1 + private->y2) / 2);
+      draw_vline (cr, item, &private->transform,
+                  private->y1, private->y2, (private->x1 + private->x2) / 2);
+      break;
+
+    case GIMP_GUIDES_THIRDS:
+      draw_hline (cr, item, &private->transform,
+                  private->x1, private->x2, (2 * private->y1 + private->y2) / 3);
+      draw_hline (cr, item, &private->transform,
+                  private->x1, private->x2, (private->y1 + 2 * private->y2) / 3);
+
+      draw_vline (cr, item, &private->transform,
+                  private->y1, private->y2, (2 * private->x1 + private->x2) / 3);
+      draw_vline (cr, item, &private->transform,
+                  private->y1, private->y2, (private->x1 + 2 * private->x2) / 3);
+      break;
+
+    case GIMP_GUIDES_FIFTHS:
+      for (i = 0; i < 5; i++)
+        {
+          draw_hline (cr, item, &private->transform,
+                      private->x1, private->x2,
+                      private->y1 + i * (private->y2 - private->y1) / 5);
+          draw_vline (cr, item, &private->transform,
+                      private->y1, private->y2,
+                      private->x1 + i * (private->x2 - private->x1) / 5);
+        }
+      break;
+
+    case GIMP_GUIDES_GOLDEN:
+      draw_hline (cr, item, &private->transform,
+                  private->x1, private->x2,
+                  (2 * private->y1 + (1 + SQRT5) * private->y2) / (3 + SQRT5));
+      draw_hline (cr, item, &private->transform,
+                  private->x1, private->x2,
+                  ((1 + SQRT5) * private->y1 + 2 * private->y2) / (3 + SQRT5));
+
+      draw_vline (cr, item, &private->transform,
+                  private->y1, private->y2,
+                  (2 * private->x1 + (1 + SQRT5) * private->x2) / (3 + SQRT5));
+      draw_vline (cr, item, &private->transform,
+                  private->y1, private->y2,
+                  ((1 + SQRT5) * private->x1 + 2 * private->x2) / (3 + SQRT5));
+      break;
+
+    /* This code implements the method of diagonals discovered by
+     * Edwin Westhoff - see http://www.diagonalmethod.info/
+     */
+    case GIMP_GUIDES_DIAGONALS:
+      {
+        /* the side of the largest square that can be
+         * fitted in whole into the rectangle (x1, y1), (x2, y2)
+         */
+        const gdouble square_side = MIN (private->x2 - private->x1,
+                                         private->y2 - private->y1);
+
+        /* diagonal from the top-left edge */
+        draw_line (cr, item, &private->transform,
+                   private->x1, private->y1,
+                   private->x1 + square_side,
+                   private->y1 + square_side);
+
+        /* diagonal from the top-right edge */
+        draw_line (cr, item, &private->transform,
+                   private->x2, private->y1,
+                   private->x2 - square_side,
+                   private->y1 + square_side);
+
+        /* diagonal from the bottom-left edge */
+        draw_line (cr, item, &private->transform,
+                   private->x1, private->y2,
+                   private->x1 + square_side,
+                   private->y2 - square_side);
+
+        /* diagonal from the bottom-right edge */
+        draw_line (cr, item, &private->transform,
+                   private->x2, private->y2,
+                   private->x2 - square_side,
+                   private->y2 - square_side);
+      }
+      break;
+
+    case GIMP_GUIDES_N_LINES:
+    case GIMP_GUIDES_SPACING:
+      {
+        gint width, height;
+        gint ngx, ngy;
+
+        width  = MAX (1, private->x2 - private->x1);
+        height = MAX (1, private->y2 - private->y1);
+
+        /*  the MIN() in the code below limits the grid to one line
+         *  every 5 image pixels, see bug 772667.
+         */
+
+        if (private->type == GIMP_GUIDES_N_LINES)
+          {
+            if (width <= height)
+              {
+                ngx = private->n_guides;
+                ngx = MIN (ngx, width / 5);
+
+                ngy = ngx * MAX (1, height / width);
+                ngy = MIN (ngy, height / 5);
+              }
+            else
+              {
+                ngy = private->n_guides;
+                ngy = MIN (ngy, height / 5);
+
+                ngx = ngy * MAX (1, width / height);
+                ngx = MIN (ngx, width / 5);
+              }
+          }
+        else /* GIMP_GUIDES_SPACING */
+          {
+            gint grid_size = MAX (2, private->n_guides);
+
+            ngx = width  / grid_size;
+            ngx = MIN (ngx, width / 5);
+
+            ngy = height / grid_size;
+            ngy = MIN (ngy, height / 5);
+          }
+
+        for (i = 1; i <= ngx; i++)
+          {
+            gdouble x = private->x1 + (((gdouble) i) / (ngx + 1) *
+                                       (private->x2 - private->x1));
+
+            draw_line (cr, item, &private->transform,
+                       x, private->y1,
+                       x, private->y2);
+          }
+
+        for (i = 1; i <= ngy; i++)
+          {
+            gdouble y = private->y1 + (((gdouble) i) / (ngy + 1) *
+                                       (private->y2 - private->y1));
+
+            draw_line (cr, item, &private->transform,
+                       private->x1, y,
+                       private->x2, y);
+          }
+      }
+    }
+
+  _gimp_canvas_item_stroke (item, cr);
+}
+
+static cairo_region_t *
+gimp_canvas_transform_guides_get_extents (GimpCanvasItem *item)
+{
+  GimpVector2           t_vertices[5];
+  gint                  n_t_vertices;
+  GimpVector2           top_left;
+  GimpVector2           bottom_right;
+  cairo_rectangle_int_t extents;
+  gint                  i;
+
+  gimp_canvas_transform_guides_transform (item, t_vertices, &n_t_vertices);
+
+  if (n_t_vertices < 2)
+    return  cairo_region_create ();
+
+  for (i = 0; i < n_t_vertices; i++)
+    {
+      GimpVector2 v;
+
+      gimp_canvas_item_transform_xy_f (item,
+                                       t_vertices[i].x, t_vertices[i].y,
+                                       &v.x,            &v.y);
+
+      if (i == 0)
+        {
+          top_left = bottom_right = v;
+        }
+      else
+        {
+          top_left.x     = MIN (top_left.x,     v.x);
+          top_left.y     = MIN (top_left.y,     v.y);
+
+          bottom_right.x = MAX (bottom_right.x, v.x);
+          bottom_right.y = MAX (bottom_right.y, v.y);
+        }
+    }
+
+  extents.x      = (gint) floor (top_left.x     - 1.5);
+  extents.y      = (gint) floor (top_left.y     - 1.5);
+  extents.width  = (gint) ceil  (bottom_right.x + 1.5) - extents.x;
+  extents.height = (gint) ceil  (bottom_right.y + 1.5) - extents.y;
+
+  return cairo_region_create_rectangle (&extents);
+}
+
+GimpCanvasItem *
+gimp_canvas_transform_guides_new (GimpDisplayShell  *shell,
+                                  const GimpMatrix3 *transform,
+                                  gdouble            x1,
+                                  gdouble            y1,
+                                  gdouble            x2,
+                                  gdouble            y2,
+                                  GimpGuidesType     type,
+                                  gint               n_guides,
+                                  gboolean           clip)
+{
+  g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+
+  return g_object_new (GIMP_TYPE_CANVAS_TRANSFORM_GUIDES,
+                       "shell",     shell,
+                       "transform", transform,
+                       "x1",        x1,
+                       "y1",        y1,
+                       "x2",        x2,
+                       "y2",        y2,
+                       "type",      type,
+                       "n-guides",  n_guides,
+                       "clip",      clip,
+                       NULL);
+}
+
+void
+gimp_canvas_transform_guides_set (GimpCanvasItem    *guides,
+                                  const GimpMatrix3 *transform,
+                                  gdouble            x1,
+                                  gdouble            y1,
+                                  gdouble            x2,
+                                  gdouble            y2,
+                                  GimpGuidesType     type,
+                                  gint               n_guides,
+                                  gboolean           clip)
+{
+  g_return_if_fail (GIMP_IS_CANVAS_TRANSFORM_GUIDES (guides));
+
+  gimp_canvas_item_begin_change (guides);
+
+  g_object_set (guides,
+                "transform", transform,
+                "x1",        x1,
+                "y1",        y1,
+                "x2",        x2,
+                "y2",        y2,
+                "type",      type,
+                "n-guides",  n_guides,
+                "clip",      clip,
+                NULL);
+
+  gimp_canvas_item_end_change (guides);
+}