[gimp/soc-2013-n-point-deformation-tool: 17/23] app: add canvas buffer preview
- From: Marek Dvoroznak <dvoromar src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gimp/soc-2013-n-point-deformation-tool: 17/23] app: add canvas buffer preview
- Date: Tue, 3 Dec 2013 00:00:00 +0000 (UTC)
commit 8eaa73a73fb14aa886c4f84fb6073225c0d2bed7
Author: Marek Dvoroznak <dvoromar gmail com>
Date: Tue Sep 10 17:50:29 2013 +0200
app: add canvas buffer preview
It is used by n-point deformation tool to preview a deformation process.
app/display/Makefile.am | 2 +
app/display/gimpcanvasbufferpreview.c | 247 +++++++++++++++++++++++++++++++++
app/display/gimpcanvasbufferpreview.h | 56 ++++++++
3 files changed, 305 insertions(+), 0 deletions(-)
---
diff --git a/app/display/Makefile.am b/app/display/Makefile.am
index 1e668e3..6a42172 100644
--- a/app/display/Makefile.am
+++ b/app/display/Makefile.am
@@ -23,6 +23,8 @@ libappdisplay_a_sources = \
gimpcanvasarc.h \
gimpcanvasboundary.c \
gimpcanvasboundary.h \
+ gimpcanvasbufferpreview.c \
+ gimpcanvasbufferpreview.h \
gimpcanvascorner.c \
gimpcanvascorner.h \
gimpcanvascursor.c \
diff --git a/app/display/gimpcanvasbufferpreview.c b/app/display/gimpcanvasbufferpreview.c
new file mode 100644
index 0000000..9623204
--- /dev/null
+++ b/app/display/gimpcanvasbufferpreview.c
@@ -0,0 +1,247 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvasbufferpreview.c
+ * Copyright (C) 2013 Marek Dvoroznak <dvoromar gmail com>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+#include <cairo/cairo.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "display/display-types.h"
+
+#include "gimpcanvas.h"
+#include "gimpcanvasbufferpreview.h"
+#include "gimpdisplayshell.h"
+#include "gimpdisplayshell-scroll.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_BUFFER
+};
+
+typedef struct _GimpCanvasBufferPreviewPrivate GimpCanvasBufferPreviewPrivate;
+
+struct _GimpCanvasBufferPreviewPrivate
+{
+ GeglBuffer *buffer;
+};
+
+#define GET_PRIVATE(transform_preview) \
+ G_TYPE_INSTANCE_GET_PRIVATE (transform_preview, \
+ GIMP_TYPE_CANVAS_BUFFER_PREVIEW, \
+ GimpCanvasBufferPreviewPrivate)
+
+
+/* local function prototypes */
+
+static void gimp_canvas_buffer_preview_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_buffer_preview_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static void gimp_canvas_buffer_preview_draw (GimpCanvasItem *item,
+ cairo_t *cr);
+static cairo_region_t * gimp_canvas_buffer_preview_get_extents (GimpCanvasItem *item);
+static void gimp_canvas_buffer_preview_compute_bounds (GimpCanvasItem *item,
+ cairo_rectangle_int_t *bounds);
+
+
+G_DEFINE_TYPE (GimpCanvasBufferPreview, gimp_canvas_buffer_preview,
+ GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_buffer_preview_parent_class
+
+
+static void
+gimp_canvas_buffer_preview_class_init (GimpCanvasBufferPreviewClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
+
+ object_class->set_property = gimp_canvas_buffer_preview_set_property;
+ object_class->get_property = gimp_canvas_buffer_preview_get_property;
+
+ item_class->draw = gimp_canvas_buffer_preview_draw;
+ item_class->get_extents = gimp_canvas_buffer_preview_get_extents;
+
+ g_object_class_install_property (object_class, PROP_BUFFER,
+ g_param_spec_object ("buffer",
+ NULL, NULL,
+ GEGL_TYPE_BUFFER,
+ GIMP_PARAM_READWRITE));
+
+ g_type_class_add_private (klass, sizeof (GimpCanvasBufferPreviewPrivate));
+}
+
+static void
+gimp_canvas_buffer_preview_init (GimpCanvasBufferPreview *transform_preview)
+{
+}
+
+static void
+gimp_canvas_buffer_preview_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasBufferPreviewPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_BUFFER:
+ private->buffer = g_value_get_object (value); /* don't ref */
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_buffer_preview_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasBufferPreviewPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_BUFFER:
+ g_value_set_object (value, private->buffer);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_buffer_preview_draw (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpDisplayShell *shell = gimp_canvas_item_get_shell (item);
+ GeglBuffer *buffer = GET_PRIVATE (item)->buffer;
+ cairo_surface_t *area;
+ guchar *data;
+ cairo_rectangle_int_t rectangle;
+ gint viewport_offset_x, viewport_offset_y;
+ gint viewport_width, viewport_height;
+
+ gimp_display_shell_scroll_get_scaled_viewport (shell,
+ &viewport_offset_x,
+ &viewport_offset_y,
+ &viewport_width,
+ &viewport_height);
+
+ gimp_canvas_buffer_preview_compute_bounds (item, &rectangle);
+
+ area = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
+ rectangle.width,
+ rectangle.height);
+
+ data = cairo_image_surface_get_data (area);
+ gegl_buffer_get (buffer,
+ GEGL_RECTANGLE ((viewport_offset_x < 0 ? 0 : viewport_offset_x),
+ (viewport_offset_y < 0 ? 0 : viewport_offset_y),
+ rectangle.width,
+ rectangle.height),
+ shell->scale_x,
+ gegl_buffer_get_format (buffer), /* has to be cairo-ARGB32 */
+ data,
+ cairo_image_surface_get_stride (area),
+ GEGL_ABYSS_NONE);
+
+ cairo_surface_flush (area);
+ cairo_surface_mark_dirty (area);
+
+ cairo_set_source_surface (cr, area, rectangle.x, rectangle.y);
+ cairo_rectangle (cr, rectangle.x, rectangle.y, rectangle.width, rectangle.height);
+ cairo_fill (cr);
+
+ cairo_surface_destroy (area);
+}
+
+static void
+gimp_canvas_buffer_preview_compute_bounds (GimpCanvasItem *item,
+ cairo_rectangle_int_t *bounds)
+{
+ GimpDisplayShell *shell = gimp_canvas_item_get_shell (item);
+ GeglBuffer *buffer = GET_PRIVATE (item)->buffer;
+ gint x_from, x_to;
+ gint y_from, y_to;
+ gint viewport_offset_x, viewport_offset_y;
+ gint viewport_width, viewport_height;
+ gint width, height;
+
+ width = gegl_buffer_get_width (buffer);
+ height = gegl_buffer_get_height (buffer);
+
+ gimp_display_shell_scroll_get_scaled_viewport (shell,
+ &viewport_offset_x,
+ &viewport_offset_y,
+ &viewport_width,
+ &viewport_height);
+
+ x_from = (viewport_offset_x < 0 ? -viewport_offset_x : 0);
+ y_from = (viewport_offset_y < 0 ? -viewport_offset_y : 0);
+
+ x_to = width * shell->scale_x - viewport_offset_x;
+ if (x_to > viewport_width) x_to = viewport_width;
+
+ y_to = height * shell->scale_y - viewport_offset_y;
+ if (y_to > viewport_height) y_to = viewport_height;
+
+ bounds->x = x_from;
+ bounds->y = y_from;
+ bounds->width = x_to - x_from;
+ bounds->height = y_to - y_from;
+}
+
+static cairo_region_t *
+gimp_canvas_buffer_preview_get_extents (GimpCanvasItem *item)
+{
+ cairo_rectangle_int_t rectangle;
+ gimp_canvas_buffer_preview_compute_bounds (item, &rectangle);
+ return cairo_region_create_rectangle (&rectangle);
+}
+
+GimpCanvasItem *
+gimp_canvas_buffer_preview_new (GimpDisplayShell *shell,
+ GeglBuffer *buffer)
+{
+ g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+ g_return_val_if_fail (GEGL_IS_BUFFER (buffer), NULL);
+
+ return g_object_new (GIMP_TYPE_CANVAS_BUFFER_PREVIEW,
+ "shell", shell,
+ "buffer", buffer,
+ NULL);
+}
diff --git a/app/display/gimpcanvasbufferpreview.h b/app/display/gimpcanvasbufferpreview.h
new file mode 100644
index 0000000..50660e9
--- /dev/null
+++ b/app/display/gimpcanvasbufferpreview.h
@@ -0,0 +1,56 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvasbufferpreview.h
+ * Copyright (C) 2013 Marek Dvoroznak <dvoromar gmail com>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_CANVAS_BUFFER_PREVIEW_H__
+#define __GIMP_CANVAS_BUFFER_PREVIEW_H__
+
+
+#include "gimpcanvasitem.h"
+
+
+#define GIMP_TYPE_CANVAS_BUFFER_PREVIEW (gimp_canvas_buffer_preview_get_type ())
+#define GIMP_CANVAS_BUFFER_PREVIEW(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj),
GIMP_TYPE_CANVAS_BUFFER_PREVIEW, GimpCanvasBufferPreview))
+#define GIMP_CANVAS_BUFFER_PREVIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass),
GIMP_TYPE_CANVAS_BUFFER_PREVIEW, GimpCanvasBufferPreviewClass))
+#define GIMP_IS_CANVAS_BUFFER_PREVIEW(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj),
GIMP_TYPE_CANVAS_BUFFER_PREVIEW))
+#define GIMP_IS_CANVAS_BUFFER_PREVIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),
GIMP_TYPE_CANVAS_BUFFER_PREVIEW))
+#define GIMP_CANVAS_BUFFER_PREVIEW_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),
GIMP_TYPE_CANVAS_BUFFER_PREVIEW, GimpCanvasBufferPreviewClass))
+
+
+typedef struct _GimpCanvasBufferPreview GimpCanvasBufferPreview;
+typedef struct _GimpCanvasBufferPreviewClass GimpCanvasBufferPreviewClass;
+
+struct _GimpCanvasBufferPreview
+{
+ GimpCanvasItem parent_instance;
+};
+
+struct _GimpCanvasBufferPreviewClass
+{
+ GimpCanvasItemClass parent_class;
+};
+
+
+GType gimp_canvas_buffer_preview_get_type (void) G_GNUC_CONST;
+
+GimpCanvasItem * gimp_canvas_buffer_preview_new (GimpDisplayShell *shell,
+ GeglBuffer *buffer);
+
+
+#endif /* __GIMP_CANVAS_BUFFER_PREVIEW_H__ */
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