Adding upstream version 2.10.36.upstream/2.10.36

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

1 files changed, 265 insertions, 0 deletions

diff --git a/app/widgets/gimpviewrenderergradient.c b/app/widgets/gimpviewrenderergradient.c
new file mode 100644
index 0000000..a2820fc
--- /dev/null
+++ b/app/widgets/gimpviewrenderergradient.c
@@ -0,0 +1,265 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpviewrenderergradient.c
+ * Copyright (C) 2003 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 <string.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpmath/gimpmath.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "core/gimpgradient.h"
+
+#include "gimpviewrenderergradient.h"
+
+
+static void   gimp_view_renderer_gradient_set_context (GimpViewRenderer *renderer,
+                                                       GimpContext      *context);
+static void   gimp_view_renderer_gradient_invalidate  (GimpViewRenderer *renderer);
+static void   gimp_view_renderer_gradient_render      (GimpViewRenderer *renderer,
+                                                       GtkWidget        *widget);
+
+
+G_DEFINE_TYPE (GimpViewRendererGradient, gimp_view_renderer_gradient,
+               GIMP_TYPE_VIEW_RENDERER);
+
+#define parent_class gimp_view_renderer_gradient_parent_class
+
+
+static void
+gimp_view_renderer_gradient_class_init (GimpViewRendererGradientClass *klass)
+{
+  GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);
+
+  renderer_class->set_context = gimp_view_renderer_gradient_set_context;
+  renderer_class->invalidate  = gimp_view_renderer_gradient_invalidate;
+  renderer_class->render      = gimp_view_renderer_gradient_render;
+}
+
+static void
+gimp_view_renderer_gradient_init (GimpViewRendererGradient *renderer)
+{
+  renderer->left  = 0.0;
+  renderer->right = 1.0;
+}
+
+static void
+gimp_view_renderer_gradient_fg_bg_changed (GimpContext      *context,
+                                           const GimpRGB    *color,
+                                           GimpViewRenderer *renderer)
+{
+#if 0
+  g_printerr ("%s: invalidating %s\n", G_STRFUNC,
+              gimp_object_get_name (renderer->viewable));
+#endif
+
+  gimp_view_renderer_invalidate (renderer);
+}
+
+static void
+gimp_view_renderer_gradient_set_context (GimpViewRenderer *renderer,
+                                         GimpContext      *context)
+{
+  GimpViewRendererGradient *rendergrad;
+
+  rendergrad = GIMP_VIEW_RENDERER_GRADIENT (renderer);
+
+  if (renderer->context && rendergrad->has_fg_bg_segments)
+    {
+      g_signal_handlers_disconnect_by_func (renderer->context,
+                                            gimp_view_renderer_gradient_fg_bg_changed,
+                                            renderer);
+    }
+
+  GIMP_VIEW_RENDERER_CLASS (parent_class)->set_context (renderer, context);
+
+  if (renderer->context && rendergrad->has_fg_bg_segments)
+    {
+      g_signal_connect (renderer->context, "foreground-changed",
+                        G_CALLBACK (gimp_view_renderer_gradient_fg_bg_changed),
+                        renderer);
+      g_signal_connect (renderer->context, "background-changed",
+                        G_CALLBACK (gimp_view_renderer_gradient_fg_bg_changed),
+                        renderer);
+
+      gimp_view_renderer_gradient_fg_bg_changed (renderer->context,
+                                                 NULL,
+                                                 renderer);
+    }
+}
+
+static void
+gimp_view_renderer_gradient_invalidate (GimpViewRenderer *renderer)
+{
+  GimpViewRendererGradient *rendergrad;
+  gboolean                  has_fg_bg_segments = FALSE;
+
+  rendergrad = GIMP_VIEW_RENDERER_GRADIENT (renderer);
+
+  if (renderer->viewable)
+    has_fg_bg_segments =
+      gimp_gradient_has_fg_bg_segments (GIMP_GRADIENT (renderer->viewable));
+
+  if (rendergrad->has_fg_bg_segments != has_fg_bg_segments)
+    {
+      if (renderer->context)
+        {
+          if (rendergrad->has_fg_bg_segments)
+            {
+              g_signal_handlers_disconnect_by_func (renderer->context,
+                                                    gimp_view_renderer_gradient_fg_bg_changed,
+                                                    renderer);
+            }
+          else
+            {
+              g_signal_connect (renderer->context, "foreground-changed",
+                                G_CALLBACK (gimp_view_renderer_gradient_fg_bg_changed),
+                                renderer);
+              g_signal_connect (renderer->context, "background-changed",
+                                G_CALLBACK (gimp_view_renderer_gradient_fg_bg_changed),
+                                renderer);
+            }
+        }
+
+      rendergrad->has_fg_bg_segments = has_fg_bg_segments;
+    }
+
+  GIMP_VIEW_RENDERER_CLASS (parent_class)->invalidate (renderer);
+}
+
+static void
+gimp_view_renderer_gradient_render (GimpViewRenderer *renderer,
+                                    GtkWidget        *widget)
+{
+  GimpViewRendererGradient *rendergrad = GIMP_VIEW_RENDERER_GRADIENT (renderer);
+  GimpGradient             *gradient   = GIMP_GRADIENT (renderer->viewable);
+  GimpGradientSegment      *seg        = NULL;
+  GimpColorTransform       *transform;
+  guchar                   *buf;
+  guchar                   *dest;
+  gint                      dest_stride;
+  gint                      x;
+  gint                      y;
+  gdouble                   dx, cur_x;
+  GimpRGB                   color;
+
+  buf   = g_alloca (4 * renderer->width);
+  dx    = (rendergrad->right - rendergrad->left) / (renderer->width - 1);
+  cur_x = rendergrad->left;
+
+  for (x = 0, dest = buf; x < renderer->width; x++, dest += 4)
+    {
+      guchar r, g, b, a;
+
+      seg = gimp_gradient_get_color_at (gradient, renderer->context, seg,
+                                        cur_x,
+                                        rendergrad->reverse,
+                                        rendergrad->blend_color_space,
+                                        &color);
+      cur_x += dx;
+
+      gimp_rgba_get_uchar (&color, &r, &g, &b, &a);
+
+      GIMP_CAIRO_ARGB32_SET_PIXEL (dest, r, g, b, a);
+    }
+
+  if (! renderer->surface)
+    renderer->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
+                                                    renderer->width,
+                                                    renderer->height);
+
+  cairo_surface_flush (renderer->surface);
+
+  dest        = cairo_image_surface_get_data (renderer->surface);
+  dest_stride = cairo_image_surface_get_stride (renderer->surface);
+
+  transform = gimp_view_renderer_get_color_transform (renderer, widget,
+                                                      babl_format ("cairo-ARGB32"),
+                                                      babl_format ("cairo-ARGB32"));
+
+  if (transform)
+    gimp_color_transform_process_pixels (transform,
+                                         babl_format ("cairo-ARGB32"), buf,
+                                         babl_format ("cairo-ARGB32"), buf,
+                                         renderer->width);
+
+  for (y = 0; y < renderer->height; y++, dest += dest_stride)
+    {
+      memcpy (dest, buf, renderer->width * 4);
+    }
+
+  cairo_surface_mark_dirty (renderer->surface);
+}
+
+void
+gimp_view_renderer_gradient_set_offsets (GimpViewRendererGradient *renderer,
+                                         gdouble                   left,
+                                         gdouble                   right)
+{
+  g_return_if_fail (GIMP_IS_VIEW_RENDERER_GRADIENT (renderer));
+
+  left  = CLAMP (left, 0.0, 1.0);
+  right = CLAMP (right, left, 1.0);
+
+  if (left != renderer->left || right != renderer->right)
+    {
+      renderer->left  = left;
+      renderer->right = right;
+
+      gimp_view_renderer_invalidate (GIMP_VIEW_RENDERER (renderer));
+    }
+}
+
+void
+gimp_view_renderer_gradient_set_reverse (GimpViewRendererGradient *renderer,
+                                         gboolean                  reverse)
+{
+  g_return_if_fail (GIMP_IS_VIEW_RENDERER_GRADIENT (renderer));
+
+  if (reverse != renderer->reverse)
+    {
+      renderer->reverse = reverse ? TRUE : FALSE;
+
+      gimp_view_renderer_invalidate (GIMP_VIEW_RENDERER (renderer));
+      gimp_view_renderer_update (GIMP_VIEW_RENDERER (renderer));
+    }
+}
+
+void
+gimp_view_renderer_gradient_set_blend_color_space (GimpViewRendererGradient    *renderer,
+                                                   GimpGradientBlendColorSpace  blend_color_space)
+{
+  g_return_if_fail (GIMP_IS_VIEW_RENDERER_GRADIENT (renderer));
+
+  if (blend_color_space != renderer->blend_color_space)
+    {
+      renderer->blend_color_space = blend_color_space;
+
+      gimp_view_renderer_invalidate (GIMP_VIEW_RENDERER (renderer));
+      gimp_view_renderer_update (GIMP_VIEW_RENDERER (renderer));
+    }
+}