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-rw-r--r--app/widgets/gimpviewrendererpalette.c260
1 files changed, 260 insertions, 0 deletions
diff --git a/app/widgets/gimpviewrendererpalette.c b/app/widgets/gimpviewrendererpalette.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpviewrendererpalette.c
+ * Copyright (C) 2005 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 "libgimpcolor/gimpcolor.h"
+#include "libgimpmath/gimpmath.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "core/gimppalette.h"
+
+#include "gimpviewrendererpalette.h"
+
+
+#define COLUMNS 16
+
+
+static void gimp_view_renderer_palette_finalize (GObject *object);
+
+static void gimp_view_renderer_palette_render (GimpViewRenderer *renderer,
+ GtkWidget *widget);
+
+
+G_DEFINE_TYPE (GimpViewRendererPalette, gimp_view_renderer_palette,
+ GIMP_TYPE_VIEW_RENDERER)
+
+#define parent_class gimp_view_renderer_palette_parent_class
+
+
+static void
+gimp_view_renderer_palette_class_init (GimpViewRendererPaletteClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);
+
+ object_class->finalize = gimp_view_renderer_palette_finalize;
+
+ renderer_class->render = gimp_view_renderer_palette_render;
+}
+
+static void
+gimp_view_renderer_palette_init (GimpViewRendererPalette *renderer)
+{
+ renderer->cell_size = 4;
+ renderer->draw_grid = FALSE;
+ renderer->columns = COLUMNS;
+}
+
+static void
+gimp_view_renderer_palette_finalize (GObject *object)
+{
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_view_renderer_palette_render (GimpViewRenderer *renderer,
+ GtkWidget *widget)
+{
+ GimpViewRendererPalette *renderpal = GIMP_VIEW_RENDERER_PALETTE (renderer);
+ GimpPalette *palette;
+ GimpColorTransform *transform;
+ guchar *row;
+ guchar *dest;
+ GList *list;
+ gdouble cell_width;
+ gint grid_width;
+ gint dest_stride;
+ gint y;
+
+ palette = GIMP_PALETTE (renderer->viewable);
+
+ if (gimp_palette_get_n_colors (palette) == 0)
+ return;
+
+ grid_width = renderpal->draw_grid ? 1 : 0;
+
+ if (renderpal->cell_size > 0)
+ {
+ gint n_columns = gimp_palette_get_columns (palette);
+
+ if (n_columns > 0)
+ cell_width = MAX ((gdouble) renderpal->cell_size,
+ (gdouble) (renderer->width - grid_width) /
+ (gdouble) n_columns);
+ else
+ cell_width = renderpal->cell_size;
+ }
+ else
+ {
+ gint n_columns = gimp_palette_get_columns (palette);
+
+ if (n_columns > 0)
+ cell_width = ((gdouble) (renderer->width - grid_width) /
+ (gdouble) n_columns);
+ else
+ cell_width = (gdouble) (renderer->width - grid_width) / 16.0;
+ }
+
+ cell_width = MAX (4.0, cell_width);
+
+ renderpal->cell_width = cell_width;
+
+ renderpal->columns = (gdouble) (renderer->width - grid_width) / cell_width;
+
+ renderpal->rows = gimp_palette_get_n_colors (palette) / renderpal->columns;
+ if (gimp_palette_get_n_colors (palette) % renderpal->columns)
+ renderpal->rows += 1;
+
+ renderpal->cell_height = MAX (4, ((renderer->height - grid_width) /
+ renderpal->rows));
+
+ if (! renderpal->draw_grid)
+ renderpal->cell_height = MIN (renderpal->cell_height,
+ renderpal->cell_width);
+
+ list = gimp_palette_get_colors (palette);
+
+ if (! renderer->surface)
+ renderer->surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
+ renderer->width,
+ renderer->height);
+
+ cairo_surface_flush (renderer->surface);
+
+ row = g_new (guchar, renderer->width * 4);
+
+ 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-RGB24"),
+ babl_format ("cairo-RGB24"));
+
+ for (y = 0; y < renderer->height; y++)
+ {
+ if ((y % renderpal->cell_height) == 0)
+ {
+ guchar r, g, b;
+ gint x;
+ gint n = 0;
+ guchar *d = row;
+
+ memset (row, renderpal->draw_grid ? 0 : 255, renderer->width * 4);
+
+ r = g = b = (renderpal->draw_grid ? 0 : 255);
+
+ for (x = 0; x < renderer->width; x++, d += 4)
+ {
+ if ((x % renderpal->cell_width) == 0)
+ {
+ if (list && n < renderpal->columns &&
+ renderer->width - x >= renderpal->cell_width)
+ {
+ GimpPaletteEntry *entry = list->data;
+
+ list = g_list_next (list);
+ n++;
+
+ gimp_rgb_get_uchar (&entry->color, &r, &g, &b);
+ }
+ else
+ {
+ r = g = b = (renderpal->draw_grid ? 0 : 255);
+ }
+ }
+
+ if (renderpal->draw_grid && (x % renderpal->cell_width) == 0)
+ {
+ GIMP_CAIRO_RGB24_SET_PIXEL (d, 0, 0, 0);
+ }
+ else
+ {
+ GIMP_CAIRO_RGB24_SET_PIXEL (d, r, g, b);
+ }
+ }
+ }
+
+ if (renderpal->draw_grid && (y % renderpal->cell_height) == 0)
+ {
+ memset (dest, 0, renderer->width * 4);
+ }
+ else
+ {
+ if (transform)
+ {
+ gimp_color_transform_process_pixels (transform,
+ babl_format ("cairo-RGB24"),
+ row,
+ babl_format ("cairo-RGB24"),
+ dest,
+ renderer->width);
+ }
+ else
+ {
+ memcpy (dest, row, renderer->width * 4);
+ }
+ }
+
+ dest += dest_stride;
+ }
+
+ g_free (row);
+
+ cairo_surface_mark_dirty (renderer->surface);
+}
+
+
+/* public functions */
+
+void
+gimp_view_renderer_palette_set_cell_size (GimpViewRendererPalette *renderer,
+ gint cell_size)
+{
+ g_return_if_fail (GIMP_IS_VIEW_RENDERER_PALETTE (renderer));
+
+ if (cell_size != renderer->cell_size)
+ {
+ renderer->cell_size = cell_size;
+
+ gimp_view_renderer_invalidate (GIMP_VIEW_RENDERER (renderer));
+ }
+}
+
+void
+gimp_view_renderer_palette_set_draw_grid (GimpViewRendererPalette *renderer,
+ gboolean draw_grid)
+{
+ g_return_if_fail (GIMP_IS_VIEW_RENDERER_PALETTE (renderer));
+
+ if (draw_grid != renderer->draw_grid)
+ {
+ renderer->draw_grid = draw_grid ? TRUE : FALSE;
+
+ gimp_view_renderer_invalidate (GIMP_VIEW_RENDERER (renderer));
+ }
+}