Adding upstream version 2.10.22.upstream/2.10.22upstream

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

1 files changed, 217 insertions, 0 deletions

diff --git a/app/core/gimp-cairo.c b/app/core/gimp-cairo.c
new file mode 100644
index 0000000..9d5574f
--- /dev/null
+++ b/app/core/gimp-cairo.c
@@ -0,0 +1,217 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimp-cairo.c
+ * Copyright (C) 2010-2012  Michael Natterer <mitch@gimp.org>
+ *
+ * Some code here is based on code from librsvg that was originally
+ * written by Raph Levien <raph@artofcode.com> for Gill.
+ *
+ * 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 "libgimpmath/gimpmath.h"
+#include "libgimpcolor/gimpcolor.h"
+
+#include "core-types.h"
+
+#include "gimp-cairo.h"
+
+
+#define REV (2.0 * G_PI)
+
+
+static cairo_user_data_key_t surface_data_key = { 0, };
+
+
+cairo_pattern_t *
+gimp_cairo_pattern_create_stipple (const GimpRGB *fg,
+                                   const GimpRGB *bg,
+                                   gint           index,
+                                   gdouble        offset_x,
+                                   gdouble        offset_y)
+{
+  cairo_surface_t *surface;
+  cairo_pattern_t *pattern;
+  guchar          *data;
+  guchar          *d;
+  guchar           fg_r, fg_g, fg_b, fg_a;
+  guchar           bg_r, bg_g, bg_b, bg_a;
+  gint             x, y;
+
+  g_return_val_if_fail (fg != NULL, NULL);
+  g_return_val_if_fail (bg != NULL, NULL);
+
+  data = g_malloc (8 * 8 * 4);
+
+  gimp_rgba_get_uchar (fg, &fg_r, &fg_g, &fg_b, &fg_a);
+  gimp_rgba_get_uchar (bg, &bg_r, &bg_g, &bg_b, &bg_a);
+
+  d = data;
+
+  for (y = 0; y < 8; y++)
+    {
+      for (x = 0; x < 8; x++)
+        {
+          if ((x + y + index) % 8 >= 4)
+            GIMP_CAIRO_ARGB32_SET_PIXEL (d, fg_r, fg_g, fg_b, fg_a);
+          else
+            GIMP_CAIRO_ARGB32_SET_PIXEL (d, bg_r, bg_g, bg_b, bg_a);
+
+          d += 4;
+        }
+    }
+
+  surface = cairo_image_surface_create_for_data (data,
+                                                 CAIRO_FORMAT_ARGB32,
+                                                 8, 8, 8 * 4);
+  cairo_surface_set_user_data (surface, &surface_data_key,
+                               data, (cairo_destroy_func_t) g_free);
+
+  pattern = cairo_pattern_create_for_surface (surface);
+  cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
+
+  cairo_surface_destroy (surface);
+
+  if (offset_x != 0.0 || offset_y != 0.0)
+    {
+      cairo_matrix_t matrix;
+
+      cairo_matrix_init_translate (&matrix,
+                                   fmod (offset_x, 8),
+                                   fmod (offset_y, 8));
+      cairo_pattern_set_matrix (pattern, &matrix);
+    }
+
+  return pattern;
+}
+
+void
+gimp_cairo_arc (cairo_t *cr,
+                gdouble  center_x,
+                gdouble  center_y,
+                gdouble  radius,
+                gdouble  start_angle,
+                gdouble  slice_angle)
+{
+  g_return_if_fail (cr != NULL);
+
+  if (slice_angle >= 0)
+    {
+      cairo_arc_negative (cr, center_x, center_y, radius,
+                          - start_angle,
+                          - start_angle - slice_angle);
+    }
+  else
+    {
+      cairo_arc (cr, center_x, center_y, radius,
+                 - start_angle,
+                 - start_angle - slice_angle);
+    }
+}
+
+void
+gimp_cairo_rounded_rectangle (cairo_t *cr,
+                              gdouble  x,
+                              gdouble  y,
+                              gdouble  width,
+                              gdouble  height,
+                              gdouble  corner_radius)
+{
+  g_return_if_fail (cr != NULL);
+
+  if (width < 0.0)
+    {
+      x     += width;
+      width  = -width;
+    }
+
+  if (height < 0.0)
+    {
+      y      += height;
+      height  = -height;
+    }
+
+  corner_radius = CLAMP (corner_radius, 0.0, MIN (width, height) / 2.0);
+
+  if (corner_radius == 0.0)
+    {
+      cairo_rectangle (cr, x, y, width, height);
+
+      return;
+    }
+
+  cairo_new_sub_path (cr);
+
+  cairo_arc     (cr,
+                 x + corner_radius, y + corner_radius,
+                 corner_radius,
+                 0.50 * REV, 0.75 * REV);
+  cairo_line_to (cr,
+                 x + width - corner_radius, y);
+
+  cairo_arc     (cr,
+                 x + width - corner_radius, y + corner_radius,
+                 corner_radius,
+                 0.75 * REV, 1.00 * REV);
+  cairo_line_to (cr,
+                 x + width, y + height - corner_radius);
+
+  cairo_arc     (cr,
+                 x + width - corner_radius, y + height - corner_radius,
+                 corner_radius,
+                 0.00 * REV, 0.25 * REV);
+  cairo_line_to (cr,
+                 x + corner_radius, y + height);
+
+  cairo_arc     (cr,
+                 x + corner_radius, y + height - corner_radius,
+                 corner_radius,
+                 0.25 * REV, 0.50 * REV);
+  cairo_line_to (cr,
+                 x, y + corner_radius);
+
+  cairo_close_path (cr);
+}
+
+void
+gimp_cairo_segments (cairo_t     *cr,
+                     GimpSegment *segs,
+                     gint         n_segs)
+{
+  gint i;
+
+  g_return_if_fail (cr != NULL);
+  g_return_if_fail (segs != NULL && n_segs > 0);
+
+  for (i = 0; i < n_segs; i++)
+    {
+      if (segs[i].x1 == segs[i].x2)
+        {
+          cairo_move_to (cr, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
+          cairo_line_to (cr, segs[i].x2 + 0.5, segs[i].y2 - 0.5);
+        }
+      else
+        {
+          cairo_move_to (cr, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
+          cairo_line_to (cr, segs[i].x2 - 0.5, segs[i].y2 + 0.5);
+        }
+    }
+}