0af9261980
The rgba variable would be used uninitialized. This needs to be moved one loop level up so that the color extracted at each cell start position is properly reused (and also so that the full transparent color at no-entry position is properly set and reused too).
266 lines
8 KiB
C
266 lines
8 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpviewrendererpalette.c
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* Copyright (C) 2005 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "libgimpwidgets/gimpwidgets.h"
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#include "widgets-types.h"
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#include "core/gimppalette.h"
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#include "gimpviewrendererpalette.h"
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#define COLUMNS 16
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static void gimp_view_renderer_palette_finalize (GObject *object);
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static void gimp_view_renderer_palette_render (GimpViewRenderer *renderer,
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GtkWidget *widget);
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G_DEFINE_TYPE (GimpViewRendererPalette, gimp_view_renderer_palette,
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GIMP_TYPE_VIEW_RENDERER)
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#define parent_class gimp_view_renderer_palette_parent_class
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static void
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gimp_view_renderer_palette_class_init (GimpViewRendererPaletteClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);
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object_class->finalize = gimp_view_renderer_palette_finalize;
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renderer_class->default_bg = GIMP_VIEW_BG_STYLE;
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renderer_class->follow_theme_bg = GIMP_VIEW_BG_STYLE;
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renderer_class->render = gimp_view_renderer_palette_render;
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}
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static void
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gimp_view_renderer_palette_init (GimpViewRendererPalette *renderer)
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{
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renderer->cell_size = 4;
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renderer->draw_grid = FALSE;
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renderer->columns = COLUMNS;
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}
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static void
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gimp_view_renderer_palette_finalize (GObject *object)
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{
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gimp_view_renderer_palette_render (GimpViewRenderer *renderer,
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GtkWidget *widget)
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{
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GimpViewRendererPalette *renderpal = GIMP_VIEW_RENDERER_PALETTE (renderer);
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GimpPalette *palette;
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GimpColorTransform *transform;
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guchar *row;
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guchar *dest;
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GList *list;
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gdouble cell_width;
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gint grid_width;
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gint dest_stride;
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gint y;
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palette = GIMP_PALETTE (renderer->viewable);
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if (gimp_palette_get_n_colors (palette) == 0)
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return;
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grid_width = renderpal->draw_grid ? 1 : 0;
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if (renderpal->cell_size > 0)
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{
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gint n_columns = gimp_palette_get_columns (palette);
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if (n_columns > 0)
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cell_width = MAX ((gdouble) renderpal->cell_size,
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(gdouble) (renderer->width - grid_width) /
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(gdouble) n_columns);
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else
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cell_width = renderpal->cell_size;
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}
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else
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{
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gint n_columns = gimp_palette_get_columns (palette);
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if (n_columns > 0)
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cell_width = ((gdouble) (renderer->width - grid_width) /
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(gdouble) n_columns);
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else
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cell_width = (gdouble) (renderer->width - grid_width) / 16.0;
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}
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cell_width = MAX (4.0, cell_width);
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renderpal->cell_width = cell_width;
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renderpal->columns = (gdouble) (renderer->width - grid_width) / cell_width;
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renderpal->rows = gimp_palette_get_n_colors (palette) / renderpal->columns;
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if (gimp_palette_get_n_colors (palette) % renderpal->columns)
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renderpal->rows += 1;
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renderpal->cell_height = MAX (4, ((renderer->height - grid_width) /
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renderpal->rows));
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if (! renderpal->draw_grid)
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renderpal->cell_height = MIN (renderpal->cell_height,
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renderpal->cell_width);
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list = gimp_palette_get_colors (palette);
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if (! renderer->surface)
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renderer->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
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renderer->width,
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renderer->height);
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cairo_surface_flush (renderer->surface);
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row = g_new (guchar, renderer->width * 4);
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dest = cairo_image_surface_get_data (renderer->surface);
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dest_stride = cairo_image_surface_get_stride (renderer->surface);
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transform = gimp_view_renderer_get_color_transform (renderer, widget,
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babl_format ("cairo-RGB24"),
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babl_format ("cairo-RGB24"));
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for (y = 0; y < renderer->height; y++)
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{
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gint x;
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if ((y % renderpal->cell_height) == 0)
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{
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guchar rgba[4];
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gint n = 0;
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guchar *d = row;
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for (x = 0; x < renderer->width; x++, d += 4)
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{
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if ((x % renderpal->cell_width) == 0)
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{
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if (list && n < renderpal->columns &&
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renderer->width - x >= renderpal->cell_width)
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{
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GimpPaletteEntry *entry = list->data;
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list = g_list_next (list);
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n++;
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/* TODO: render directly to widget color space! */
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gegl_color_get_pixel (entry->color,
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babl_format ("R'G'B'A u8"), rgba);
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}
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else
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{
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gint i;
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/* Background color (not entries, not grids) */
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for (i = 0; i < 4; i++)
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rgba[i] = 0;
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}
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}
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if (renderpal->draw_grid && (x % renderpal->cell_width) == 0)
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{
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/* Vertical grid lines */
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GIMP_CAIRO_ARGB32_SET_PIXEL (d, 0, 0, 0, 0);
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}
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else
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{
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/* Palette entry */
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GIMP_CAIRO_ARGB32_SET_PIXEL (d, rgba[0], rgba[1], rgba[2], rgba[3]);
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}
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}
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}
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if (renderpal->draw_grid && (y % renderpal->cell_height) == 0)
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{
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/* Horizontal grid lines */
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memset (dest, 0, renderer->width * 4);
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}
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else
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{
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if (transform)
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{
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gimp_color_transform_process_pixels (transform,
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babl_format ("cairo-ARGB32"),
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row,
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babl_format ("cairo-ARGB32"),
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dest,
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renderer->width);
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}
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else
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{
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memcpy (dest, row, renderer->width * 4);
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}
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}
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dest += dest_stride;
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}
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g_free (row);
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cairo_surface_mark_dirty (renderer->surface);
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}
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/* public functions */
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void
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gimp_view_renderer_palette_set_cell_size (GimpViewRendererPalette *renderer,
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gint cell_size)
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{
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g_return_if_fail (GIMP_IS_VIEW_RENDERER_PALETTE (renderer));
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if (cell_size != renderer->cell_size)
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{
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renderer->cell_size = cell_size;
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gimp_view_renderer_invalidate (GIMP_VIEW_RENDERER (renderer));
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}
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}
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void
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gimp_view_renderer_palette_set_draw_grid (GimpViewRendererPalette *renderer,
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gboolean draw_grid)
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{
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g_return_if_fail (GIMP_IS_VIEW_RENDERER_PALETTE (renderer));
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if (draw_grid != renderer->draw_grid)
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{
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renderer->draw_grid = draw_grid ? TRUE : FALSE;
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gimp_view_renderer_invalidate (GIMP_VIEW_RENDERER (renderer));
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}
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}
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