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Diffstat (limited to 'app/widgets/gimpviewrendererimage.c')
| -rw-r--r-- | app/widgets/gimpviewrendererimage.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/app/widgets/gimpviewrendererimage.c b/app/widgets/gimpviewrendererimage.c new file mode 100644 index 0000000..fe4930a --- /dev/null +++ b/app/widgets/gimpviewrendererimage.c @@ -0,0 +1,191 @@ +/* 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); +} |