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Diffstat (limited to 'app/widgets/gimpviewrendererpalette.c')
| -rw-r--r-- | app/widgets/gimpviewrendererpalette.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/app/widgets/gimpviewrendererpalette.c b/app/widgets/gimpviewrendererpalette.c new file mode 100644 index 0000000..6c99c60 --- /dev/null +++ b/app/widgets/gimpviewrendererpalette.c @@ -0,0 +1,260 @@ +/* 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)); + } +} |