/* PIKA - Photo and Image Kooker Application * a rebranding of The GNU Image Manipulation Program (created with heckimp) * A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio * * Original copyright, applying to most contents (license remains unchanged): * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * gimphistogram module Copyright (C) 1999 Jay Cox * * 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 . */ #include "config.h" #include #include #include #include "core-types.h" #include "gegl/pika-gegl-nodes.h" #include "gegl/pikatilehandlervalidate.h" #include "pikaasync.h" #include "pikachannel.h" #include "pikadrawable-filters.h" #include "pikadrawable-histogram.h" #include "pikahistogram.h" #include "pikaimage.h" #include "pikaprojectable.h" /* local function prototypes */ static PikaAsync * pika_drawable_calculate_histogram_internal (PikaDrawable *drawable, PikaHistogram *histogram, gboolean with_filters, gboolean run_async); /* private functions */ static PikaAsync * pika_drawable_calculate_histogram_internal (PikaDrawable *drawable, PikaHistogram *histogram, gboolean with_filters, gboolean run_async) { PikaAsync *async = NULL; PikaImage *image; PikaChannel *mask; gint x, y, width, height; if (! pika_item_mask_intersect (PIKA_ITEM (drawable), &x, &y, &width, &height)) goto end; image = pika_item_get_image (PIKA_ITEM (drawable)); mask = pika_image_get_mask (image); if (FALSE) { GeglNode *node = gegl_node_new (); GeglNode *source; GeglNode *histogram_sink; GeglProcessor *processor; if (with_filters) { source = pika_drawable_get_source_node (drawable); } else { source = pika_gegl_add_buffer_source (node, pika_drawable_get_buffer (drawable), 0, 0); } histogram_sink = gegl_node_new_child (node, "operation", "pika:histogram-sink", "histogram", histogram, NULL); gegl_node_link (source, histogram_sink); if (! pika_channel_is_empty (mask)) { GeglNode *mask_source; gint off_x, off_y; g_printerr ("adding mask aux\n"); pika_item_get_offset (PIKA_ITEM (drawable), &off_x, &off_y); mask_source = pika_gegl_add_buffer_source (node, pika_drawable_get_buffer (PIKA_DRAWABLE (mask)), -off_x, -off_y); gegl_node_connect (mask_source, "output", histogram_sink, "aux"); } processor = gegl_node_new_processor (histogram_sink, GEGL_RECTANGLE (x, y, width, height)); while (gegl_processor_work (processor, NULL)); g_object_unref (processor); g_object_unref (node); } else { GeglBuffer *buffer = pika_drawable_get_buffer (drawable); PikaProjectable *projectable = NULL; if (with_filters && pika_drawable_has_filters (drawable)) { PikaTileHandlerValidate *validate; GeglNode *node; node = pika_drawable_get_source_node (drawable); buffer = gegl_buffer_new (gegl_buffer_get_extent (buffer), gegl_buffer_get_format (buffer)); validate = PIKA_TILE_HANDLER_VALIDATE (pika_tile_handler_validate_new (node)); pika_tile_handler_validate_assign (validate, buffer); g_object_unref (validate); pika_tile_handler_validate_invalidate (validate, gegl_buffer_get_extent (buffer)); #if 0 /* this would keep the buffer updated across drawable or * filter changes, but the histogram is created in one go * and doesn't need the signal connection */ g_signal_connect_object (node, "invalidated", G_CALLBACK (pika_tile_handler_validate_invalidate), validate, G_CONNECT_SWAPPED); #endif if (PIKA_IS_PROJECTABLE (drawable)) projectable = PIKA_PROJECTABLE (drawable); } else { g_object_ref (buffer); } if (projectable) pika_projectable_begin_render (projectable); if (! pika_channel_is_empty (mask)) { gint off_x, off_y; pika_item_get_offset (PIKA_ITEM (drawable), &off_x, &off_y); if (run_async) { async = pika_histogram_calculate_async ( histogram, buffer, GEGL_RECTANGLE (x, y, width, height), pika_drawable_get_buffer (PIKA_DRAWABLE (mask)), GEGL_RECTANGLE (x + off_x, y + off_y, width, height)); } else { pika_histogram_calculate ( histogram, buffer, GEGL_RECTANGLE (x, y, width, height), pika_drawable_get_buffer (PIKA_DRAWABLE (mask)), GEGL_RECTANGLE (x + off_x, y + off_y, width, height)); } } else { if (run_async) { async = pika_histogram_calculate_async ( histogram, buffer, GEGL_RECTANGLE (x, y, width, height), NULL, NULL); } else { pika_histogram_calculate ( histogram, buffer, GEGL_RECTANGLE (x, y, width, height), NULL, NULL); } } if (projectable) pika_projectable_end_render (projectable); g_object_unref (buffer); } end: if (run_async && ! async) { async = pika_async_new (); pika_async_finish (async, NULL); } return async; } /* public functions */ void pika_drawable_calculate_histogram (PikaDrawable *drawable, PikaHistogram *histogram, gboolean with_filters) { g_return_if_fail (PIKA_IS_DRAWABLE (drawable)); g_return_if_fail (pika_item_is_attached (PIKA_ITEM (drawable))); g_return_if_fail (histogram != NULL); pika_drawable_calculate_histogram_internal (drawable, histogram, with_filters, FALSE); } PikaAsync * pika_drawable_calculate_histogram_async (PikaDrawable *drawable, PikaHistogram *histogram, gboolean with_filters) { g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL); g_return_val_if_fail (pika_item_is_attached (PIKA_ITEM (drawable)), NULL); g_return_val_if_fail (histogram != NULL, NULL); return pika_drawable_calculate_histogram_internal (drawable, histogram, with_filters, TRUE); }