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-rw-r--r--app/widgets/gimpviewrendererimage.c191
1 files changed, 191 insertions, 0 deletions
diff --git a/app/widgets/gimpviewrendererimage.c b/app/widgets/gimpviewrendererimage.c
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+++ b/app/widgets/gimpviewrendererimage.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpviewrendererimage.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 <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "core/gimpimage.h"
+#include "core/gimpimageproxy.h"
+#include "core/gimptempbuf.h"
+
+#include "gimpviewrendererimage.h"
+
+
+static void gimp_view_renderer_image_render (GimpViewRenderer *renderer,
+ GtkWidget *widget);
+
+
+G_DEFINE_TYPE (GimpViewRendererImage, gimp_view_renderer_image,
+ GIMP_TYPE_VIEW_RENDERER)
+
+#define parent_class gimp_view_renderer_image_parent_class
+
+
+static void
+gimp_view_renderer_image_class_init (GimpViewRendererImageClass *klass)
+{
+ GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);
+
+ renderer_class->render = gimp_view_renderer_image_render;
+}
+
+static void
+gimp_view_renderer_image_init (GimpViewRendererImage *renderer)
+{
+ renderer->channel = -1;
+}
+
+static void
+gimp_view_renderer_image_render (GimpViewRenderer *renderer,
+ GtkWidget *widget)
+{
+ GimpViewRendererImage *rendererimage = GIMP_VIEW_RENDERER_IMAGE (renderer);
+ GimpImage *image;
+ const gchar *icon_name;
+ gint width;
+ gint height;
+
+ if (GIMP_IS_IMAGE (renderer->viewable))
+ {
+ image = GIMP_IMAGE (renderer->viewable);
+ }
+ else if (GIMP_IS_IMAGE_PROXY (renderer->viewable))
+ {
+ image = gimp_image_proxy_get_image (
+ GIMP_IMAGE_PROXY (renderer->viewable));
+ }
+ else
+ {
+ g_return_if_reached ();
+ }
+
+ gimp_viewable_get_size (renderer->viewable, &width, &height);
+
+ /* The conditions checked here are mostly a hack to hide the fact that
+ * we are creating the channel preview from the image preview and turning
+ * off visibility of a channel has the side-effect of painting the channel
+ * preview all black. See bug #459518 for details.
+ */
+ if (rendererimage->channel == -1 ||
+ (gimp_image_get_component_visible (image, rendererimage->channel)))
+ {
+ gint view_width;
+ gint view_height;
+ gdouble xres;
+ gdouble yres;
+ gboolean scaling_up;
+ GimpTempBuf *render_buf = NULL;
+
+ gimp_image_get_resolution (image, &xres, &yres);
+
+ gimp_viewable_calc_preview_size (width,
+ height,
+ renderer->width,
+ renderer->height,
+ renderer->dot_for_dot,
+ xres,
+ yres,
+ &view_width,
+ &view_height,
+ &scaling_up);
+
+ if (scaling_up)
+ {
+ GimpTempBuf *temp_buf;
+
+ temp_buf = gimp_viewable_get_new_preview (renderer->viewable,
+ renderer->context,
+ width, height);
+
+ if (temp_buf)
+ {
+ render_buf = gimp_temp_buf_scale (temp_buf,
+ view_width, view_height);
+ gimp_temp_buf_unref (temp_buf);
+ }
+ }
+ else
+ {
+ render_buf = gimp_viewable_get_new_preview (renderer->viewable,
+ renderer->context,
+ view_width,
+ view_height);
+ }
+
+ if (render_buf)
+ {
+ gint render_buf_x = 0;
+ gint render_buf_y = 0;
+ gint component_index = -1;
+
+ /* xresolution != yresolution */
+ if (view_width > renderer->width || view_height > renderer->height)
+ {
+ GimpTempBuf *temp_buf;
+
+ temp_buf = gimp_temp_buf_scale (render_buf,
+ renderer->width, renderer->height);
+ gimp_temp_buf_unref (render_buf);
+ render_buf = temp_buf;
+ }
+
+ if (view_width < renderer->width)
+ render_buf_x = (renderer->width - view_width) / 2;
+
+ if (view_height < renderer->height)
+ render_buf_y = (renderer->height - view_height) / 2;
+
+ if (rendererimage->channel != -1)
+ component_index =
+ gimp_image_get_component_index (image, rendererimage->channel);
+
+ gimp_view_renderer_render_temp_buf (renderer, widget, render_buf,
+ render_buf_x, render_buf_y,
+ component_index,
+ GIMP_VIEW_BG_CHECKS,
+ GIMP_VIEW_BG_WHITE);
+ gimp_temp_buf_unref (render_buf);
+
+ return;
+ }
+ }
+
+ switch (rendererimage->channel)
+ {
+ case GIMP_CHANNEL_RED: icon_name = GIMP_ICON_CHANNEL_RED; break;
+ case GIMP_CHANNEL_GREEN: icon_name = GIMP_ICON_CHANNEL_GREEN; break;
+ case GIMP_CHANNEL_BLUE: icon_name = GIMP_ICON_CHANNEL_BLUE; break;
+ case GIMP_CHANNEL_GRAY: icon_name = GIMP_ICON_CHANNEL_GRAY; break;
+ case GIMP_CHANNEL_INDEXED: icon_name = GIMP_ICON_CHANNEL_INDEXED; break;
+ case GIMP_CHANNEL_ALPHA: icon_name = GIMP_ICON_CHANNEL_ALPHA; break;
+
+ default:
+ icon_name = gimp_viewable_get_icon_name (renderer->viewable);
+ break;
+ }
+
+ gimp_view_renderer_render_icon (renderer, widget, icon_name);
+}