n_gui_color.h

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/*
 * Nilorea Library
 * Copyright (C) 2005-2026 Castagnier Mickael
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef __NILOREA_GUI_COLOR__
#define __NILOREA_GUI_COLOR__
 
/* Allegro only: the picker is N_GUI widgets and the swatch is drawn with
 * allegro_primitives. */
#ifdef HAVE_ALLEGRO
 
#ifdef __cplusplus
extern "C" {
#endif

 
#include <stddef.h>
 
#include "nilorea/n_gui.h"

typedef struct N_GUI_COLOR_PICKER N_GUI_COLOR_PICKER;

typedef void (*N_GUI_COLOR_FN)(const float rgba[4], void* user_data);

N_GUI_COLOR_PICKER* n_gui_color_picker_new(N_GUI_CTX* ctx, const char* title, float scale);

void n_gui_color_picker_open(N_GUI_COLOR_PICKER* picker, const char* what, const float rgba[4], N_GUI_COLOR_FN on_change, void* user_data);

void n_gui_color_picker_close(N_GUI_COLOR_PICKER* picker);

int n_gui_color_picker_is_open(const N_GUI_COLOR_PICKER* picker);

int n_gui_color_picker_get(const N_GUI_COLOR_PICKER* picker, float rgba[4]);

int n_gui_color_picker_window(const N_GUI_COLOR_PICKER* picker);

int n_gui_color_picker_slider(const N_GUI_COLOR_PICKER* picker, int channel);

void n_gui_color_picker_free(N_GUI_COLOR_PICKER** picker);

void n_gui_draw_color_swatch(float x, float y, float w, float h, const float rgba[4]);

void n_gui_color_to_hex(const float rgba[4], char* out, size_t len);

ALLEGRO_MOUSE_CURSOR* n_gui_eyedropper_cursor(float scale);

 
#ifdef __cplusplus
}
#endif
#endif /* HAVE_ALLEGRO */
#endif /* __NILOREA_GUI_COLOR__ */