diff options
Diffstat (limited to 'app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.c')
| -rw-r--r-- | app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.c b/app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.c new file mode 100644 index 0000000..eb9c040 --- /dev/null +++ b/app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.c @@ -0,0 +1,146 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpoperationhuemode.c + * Copyright (C) 2008 Michael Natterer <mitch@gimp.org> + * 2012 Ville Sokk <ville.sokk@gmail.com> + * + * 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 <cairo.h> +#include <gegl-plugin.h> +#include <gdk-pixbuf/gdk-pixbuf.h> + +#include "libgimpcolor/gimpcolor.h" + +#include "../operations-types.h" + +#include "gimpoperationhsvhuelegacy.h" + + +static gboolean gimp_operation_hsv_hue_legacy_process (GeglOperation *op, + void *in, + void *layer, + void *mask, + void *out, + glong samples, + const GeglRectangle *roi, + gint level); + + +G_DEFINE_TYPE (GimpOperationHsvHueLegacy, gimp_operation_hsv_hue_legacy, + GIMP_TYPE_OPERATION_LAYER_MODE) + + +static void +gimp_operation_hsv_hue_legacy_class_init (GimpOperationHsvHueLegacyClass *klass) +{ + GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass); + GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass); + + gegl_operation_class_set_keys (operation_class, + "name", "gimp:hsv-hue-legacy", + "description", "GIMP hue mode operation", + NULL); + + layer_mode_class->process = gimp_operation_hsv_hue_legacy_process; +} + +static void +gimp_operation_hsv_hue_legacy_init (GimpOperationHsvHueLegacy *self) +{ +} + +static gboolean +gimp_operation_hsv_hue_legacy_process (GeglOperation *op, + void *in_p, + void *layer_p, + void *mask_p, + void *out_p, + glong samples, + const GeglRectangle *roi, + gint level) +{ + GimpOperationLayerMode *layer_mode = (gpointer) op; + gfloat *in = in_p; + gfloat *out = out_p; + gfloat *layer = layer_p; + gfloat *mask = mask_p; + gfloat opacity = layer_mode->opacity; + + while (samples--) + { + GimpHSV layer_hsv, out_hsv; + GimpRGB layer_rgb = {layer[0], layer[1], layer[2]}; + GimpRGB out_rgb = {in[0], in[1], in[2]}; + gfloat comp_alpha, new_alpha; + + comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity; + if (mask) + comp_alpha *= *mask; + + new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha; + + if (comp_alpha && new_alpha) + { + gint b; + gfloat out_tmp[3]; + gfloat ratio = comp_alpha / new_alpha; + + gimp_rgb_to_hsv (&layer_rgb, &layer_hsv); + gimp_rgb_to_hsv (&out_rgb, &out_hsv); + + /* Composition should have no effect if saturation is zero. + * otherwise, black would be painted red (see bug #123296). + */ + if (layer_hsv.s) + { + out_hsv.h = layer_hsv.h; + } + gimp_hsv_to_rgb (&out_hsv, &out_rgb); + + out_tmp[0] = out_rgb.r; + out_tmp[1] = out_rgb.g; + out_tmp[2] = out_rgb.b; + + for (b = RED; b < ALPHA; b++) + { + out[b] = out_tmp[b] * ratio + in[b] * (1.0f - ratio); + } + } + else + { + gint b; + + for (b = RED; b < ALPHA; b++) + { + out[b] = in[b]; + } + } + + out[ALPHA] = in[ALPHA]; + + in += 4; + layer += 4; + out += 4; + + if (mask) + mask++; + } + + return TRUE; +} |