summaryrefslogtreecommitdiffstats
path: root/app/display/gimpcanvasbufferpreview.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--app/display/gimpcanvasbufferpreview.c263
1 files changed, 263 insertions, 0 deletions
diff --git a/app/display/gimpcanvasbufferpreview.c b/app/display/gimpcanvasbufferpreview.c
new file mode 100644
index 0000000..858bab6
--- /dev/null
+++ b/app/display/gimpcanvasbufferpreview.c
@@ -0,0 +1,263 @@
+/* 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+#include <cairo/cairo.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "display/display-types.h"
+
+#include "core/gimpimage.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) \
+ ((GimpCanvasBufferPreviewPrivate *) gimp_canvas_buffer_preview_get_instance_private ((GimpCanvasBufferPreview *) (transform_preview)))
+
+
+/* local function prototypes */
+
+static void gimp_canvas_buffer_preview_dispose (GObject *object);
+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_WITH_PRIVATE (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->dispose = gimp_canvas_buffer_preview_dispose;
+ 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));
+}
+
+static void
+gimp_canvas_buffer_preview_init (GimpCanvasBufferPreview *transform_preview)
+{
+}
+
+static void
+gimp_canvas_buffer_preview_dispose (GObject *object)
+{
+ GimpCanvasBufferPreviewPrivate *private = GET_PRIVATE (object);
+
+ g_clear_object (&private->buffer);
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+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:
+ g_set_object (&private->buffer, g_value_get_object (value));
+ 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;
+
+ g_return_if_fail (GEGL_IS_BUFFER (buffer));
+
+ 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 (rectangle.x + shell->offset_x,
+ rectangle.y + shell->offset_y,
+ rectangle.width,
+ rectangle.height),
+ shell->scale_x,
+ babl_format ("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;
+ GeglRectangle extent;
+ gdouble x1, y1;
+ gdouble x2, y2;
+
+ g_return_if_fail (GEGL_IS_BUFFER (buffer));
+
+ extent = *gegl_buffer_get_extent (buffer);
+
+ gimp_canvas_item_transform_xy_f (item,
+ extent.x,
+ extent.y,
+ &x1, &y1);
+ gimp_canvas_item_transform_xy_f (item,
+ extent.x + extent.width,
+ extent.y + extent.height,
+ &x2, &y2);
+
+ extent.x = floor (x1);
+ extent.y = floor (y1);
+ extent.width = ceil (x2) - extent.x;
+ extent.height = ceil (y2) - extent.y;
+
+ gegl_rectangle_intersect (&extent,
+ &extent,
+ GEGL_RECTANGLE (0,
+ 0,
+ shell->disp_width,
+ shell->disp_height));
+
+ bounds->x = extent.x;
+ bounds->y = extent.y;
+ bounds->width = extent.width;
+ bounds->height = extent.height;
+}
+
+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);
+}