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Diffstat (limited to 'src/cr-rgb.c')
| -rw-r--r-- | src/cr-rgb.c | 484 |
1 files changed, 484 insertions, 0 deletions
diff --git a/src/cr-rgb.c b/src/cr-rgb.c new file mode 100644 index 0000000..5999d23 --- /dev/null +++ b/src/cr-rgb.c @@ -0,0 +1,484 @@ +/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */ + +/* + * This file is part of The Croco Library + * + * Copyright (C) 2002-2003 Dodji Seketeli <dodji@seketeli.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2.1 of the GNU Lesser General Public + * License as published by the Free Software Foundation. + * + * 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 Lesser General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + */ + +/* + *$Id$ + */ + +#include <stdio.h> +#include <string.h> +#include "cr-rgb.h" + +static CRRgb gv_standard_colors[] = +{ + { "aliceblue", 240, 248, 255, 0}, + { "antiquewhite", 250, 235, 215, 0}, + { "aqua", 0, 255, 255, 0}, + { "aquamarine", 127, 255, 212, 0}, + { "azure", 240, 255, 255, 0}, + { "beige", 245, 245, 220, 0}, + { "bisque", 255, 228, 196, 0}, + { "black", 0, 0, 0, 0}, + { "blanchedalmond", 255, 235, 205, 0}, + { "blue", 0, 0, 255, 0}, + { "blueviolet", 138, 43, 226, 0}, + { "brown", 165, 42, 42, 0}, + { "burlywood", 222, 184, 135, 0}, + { "cadetblue", 95, 158, 160, 0}, + { "chartreuse", 127, 255, 0, 0}, + { "chocolate", 210, 105, 30, 0}, + { "coral", 255, 127, 80, 0}, + { "cornflowerblue", 100, 149, 237, 0}, + { "cornsilk", 255, 248, 220, 0}, + { "crimson", 220, 20, 60, 0}, + { "cyan", 0, 255, 255, 0}, + { "darkblue", 0, 0, 139, 0}, + { "darkcyan", 0, 139, 139, 0}, + { "darkgoldenrod", 184, 134, 11, 0}, + { "darkgray", 169, 169, 169, 0}, + { "darkgreen", 0, 100, 0, 0}, + { "darkgrey", 169, 169, 169, 0}, + { "darkkhaki", 189, 183, 107, 0}, + { "darkmagenta", 139, 0, 139, 0}, + { "darkolivegreen", 85, 107, 47, 0}, + { "darkorange", 255, 140, 0, 0}, + { "darkorchid", 153, 50, 204, 0}, + { "darkred", 139, 0, 0, 0}, + { "darksalmon", 233, 150, 122, 0}, + { "darkseagreen", 143, 188, 143, 0}, + { "darkslateblue", 72, 61, 139, 0}, + { "darkslategray", 47, 79, 79, 0}, + { "darkslategrey", 47, 79, 79, 0}, + { "darkturquoise", 0, 206, 209, 0}, + { "darkviolet", 148, 0, 211, 0}, + { "deeppink", 255, 20, 147, 0}, + { "deepskyblue", 0, 191, 255, 0}, + { "dimgray", 105, 105, 105, 0}, + { "dimgrey", 105, 105, 105, 0}, + { "dodgerblue", 30, 144, 255, 0}, + { "firebrick", 178, 34, 34, 0}, + { "floralwhite", 255, 250, 240, 0}, + { "forestgreen", 34, 139, 34, 0}, + { "fuchsia", 255, 0, 255, 0}, + { "gainsboro", 220, 220, 220, 0}, + { "ghostwhite", 248, 248, 255, 0}, + { "gold", 255, 215, 0, 0}, + { "goldenrod", 218, 165, 32, 0}, + { "gray", 128, 128, 128, 0}, + { "grey", 128, 128, 128, 0}, + { "green", 0, 128, 0, 0}, + { "greenyellow", 173, 255, 47, 0}, + { "honeydew", 240, 255, 240, 0}, + { "hotpink", 255, 105, 180, 0}, + { "indianred", 205, 92, 92, 0}, + { "indigo", 75, 0, 130, 0}, + { "ivory", 255, 255, 240, 0}, + { "khaki", 240, 230, 140, 0}, + { "lavender", 230, 230, 250, 0}, + { "lavenderblush", 255, 240, 245, 0}, + { "lawngreen", 124, 252, 0, 0}, + { "lemonchiffon", 255, 250, 205, 0}, + { "lightblue", 173, 216, 230, 0}, + { "lightcoral", 240, 128, 128, 0}, + { "lightcyan", 224, 255, 255, 0}, + { "lightgoldenrodyellow", 250, 250, 210, 0}, + { "lightgray", 211, 211, 211, 0}, + { "lightgreen", 144, 238, 144, 0}, + { "lightgrey", 211, 211, 211, 0}, + { "lightpink", 255, 182, 193, 0}, + { "lightsalmon", 255, 160, 122, 0}, + { "lightseagreen", 32, 178, 170, 0}, + { "lightskyblue", 135, 206, 250, 0}, + { "lightslategray", 119, 136, 153, 0}, + { "lightslategrey", 119, 136, 153, 0}, + { "lightsteelblue", 176, 196, 222, 0}, + { "lightyellow", 255, 255, 224, 0}, + { "lime", 0, 255, 0, 0}, + { "limegreen", 50, 205, 50, 0}, + { "linen", 250, 240, 230, 0}, + { "magenta", 255, 0, 255, 0}, + { "maroon", 128, 0, 0, 0}, + { "mediumaquamarine", 102, 205, 170, 0}, + { "mediumblue", 0, 0, 205, 0}, + { "mediumorchid", 186, 85, 211, 0}, + { "mediumpurple", 147, 112, 219, 0}, + { "mediumseagreen", 60, 179, 113, 0}, + { "mediumslateblue", 123, 104, 238, 0}, + { "mediumspringgreen", 0, 250, 154, 0}, + { "mediumturquoise", 72, 209, 204, 0}, + { "mediumvioletred", 199, 21, 133, 0}, + { "midnightblue", 25, 25, 112, 0}, + { "mintcream", 245, 255, 250, 0}, + { "mistyrose", 255, 228, 225, 0}, + { "moccasin", 255, 228, 181, 0}, + { "navajowhite", 255, 222, 173, 0}, + { "navy", 0, 0, 128, 0}, + { "oldlace", 253, 245, 230, 0}, + { "olive", 128, 128, 0, 0}, + { "olivedrab", 107, 142, 35, 0}, + { "orange", 255, 165, 0, 0}, + { "orangered", 255, 69, 0, 0}, + { "orchid", 218, 112, 214, 0}, + { "palegoldenrod", 238, 232, 170, 0}, + { "palegreen", 152, 251, 152, 0}, + { "paleturquoise", 175, 238, 238, 0}, + { "palevioletred", 219, 112, 147, 0}, + { "papayawhip", 255, 239, 213, 0}, + { "peachpuff", 255, 218, 185, 0}, + { "peru", 205, 133, 63, 0}, + { "pink", 255, 192, 203, 0}, + { "plum", 221, 160, 221, 0}, + { "powderblue", 176, 224, 230, 0}, + { "purple", 128, 0, 128, 0}, + { "red", 255, 0, 0, 0}, + { "rosybrown", 188, 143, 143, 0}, + { "royalblue", 65, 105, 225, 0}, + { "saddlebrown", 139, 69, 19, 0}, + { "salmon", 250, 128, 114, 0}, + { "sandybrown", 244, 164, 96, 0}, + { "seagreen", 46, 139, 87, 0}, + { "seashell", 255, 245, 238, 0}, + { "sienna", 160, 82, 45, 0}, + { "silver", 192, 192, 192, 0}, + { "skyblue", 135, 206, 235, 0}, + { "slateblue", 106, 90, 205, 0}, + { "slategray", 112, 128, 144, 0}, + { "slategrey", 112, 128, 144, 0}, + { "snow", 255, 250, 250, 0}, + { "springgreen", 0, 255, 127, 0}, + { "steelblue", 70, 130, 180, 0}, + { "tan", 210, 180, 140, 0}, + { "teal", 0, 128, 128, 0}, + { "thistle", 216, 191, 216, 0}, + { "tomato", 255, 99, 71, 0}, + { "turquoise", 64, 224, 208, 0}, + { "violet", 238, 130, 238, 0}, + { "wheat", 245, 222, 179, 0}, + { "white", 255, 255, 255, 0}, + { "whitesmoke", 245, 245, 245, 0}, + { "yellow", 255, 255, 0, 0}, + { "yellowgreen", 154, 205, 50, 0} +} ; + +/** + *The default constructor of #CRRgb. + *@return the newly built instance of #CRRgb + */ +CRRgb * +cr_rgb_new (void) +{ + CRRgb *result = NULL ; + + result = g_try_malloc (sizeof (CRRgb)) ; + + if (result == NULL) + { + cr_utils_trace_info ("No more memory") ; + return NULL ; + } + + memset (result, 0, sizeof (CRRgb)) ; + + return result ; +} + + +/** + *A constructor of #CRRgb. + *@param a_red the red component of the color. + *@param a_green the green component of the color. + *@param a_blue the blue component of the color. + *@param a_unit the unit of the rgb values. + *(either percentage or integer values) + *@return the newly built instance of #CRRgb. + */ +CRRgb * +cr_rgb_new_with_vals (gulong a_red, gulong a_green, + gulong a_blue, gboolean a_is_percentage) +{ + CRRgb *result = NULL ; + + result = cr_rgb_new () ; + + g_return_val_if_fail (result, NULL) ; + + result->red = a_red ; + result->green = a_green ; + result->blue = a_blue ; + result->is_percentage = a_is_percentage ; + + return result ; +} + +/** + *Serialises the rgb into a zero terminated string. + *@param a_this the instance of #CRRgb to serialize. + *@return the zero terminated string containing the serialised + *rgb. MUST BE FREED by the caller using g_free(). + */ +guchar * +cr_rgb_to_string (CRRgb *a_this) +{ + guchar *result = NULL ; + GString *str_buf = NULL ; + + str_buf = g_string_new (NULL) ; + g_return_val_if_fail (str_buf, NULL) ; + + if (a_this->is_percentage == TRUE) + { + g_string_append_printf (str_buf, "%ld", a_this->red) ; + + g_string_append_c (str_buf, '%') ; + g_string_append_printf (str_buf,", ") ; + + g_string_append_printf (str_buf,"%ld", a_this->green) ; + g_string_append_c (str_buf, '%') ; ; + g_string_append_printf (str_buf,", ") ; + + g_string_append_printf (str_buf,"%ld", a_this->blue) ; + g_string_append_c (str_buf, '%') ; + } + else + { + g_string_append_printf (str_buf,"%ld", a_this->red) ; + g_string_append_printf (str_buf,", ") ; + + g_string_append_printf (str_buf,"%ld", a_this->green) ; + g_string_append_printf (str_buf,", ") ; + + g_string_append_printf (str_buf,"%ld", a_this->blue) ; + } + + if (str_buf) + { + result = str_buf->str ; + g_string_free (str_buf, FALSE) ; + } + + return result ; +} + +/** + *Dumps the current instance of #CRRgb + *to a file. + *@param a_this the "this pointer" of + *the current instance of #CRRgb. + *@param a_fp the destination file pointer. + */ +void +cr_rgb_dump (CRRgb *a_this, FILE *a_fp) +{ + guchar *str = NULL ; + + g_return_if_fail (a_this) ; + + str = cr_rgb_to_string (a_this) ; + + if (str) + { + fprintf (a_fp, "%s",str) ; + g_free (str) ; + str = NULL ; + } +} + +/** + *Sets rgb values to the RGB. + *If the rgb values are percentages, make + *sure that the sum of the 3 values makes 100%. + *@param a_this the current instance of #CRRgb. + *@param a_red the red value. + *@param a_green the green value. + *@param a_blue the blue value. + *@return CR_OK upon successfull completion, an error code + *otherwise. + */ +enum CRStatus +cr_rgb_set (CRRgb *a_this, gulong a_red, + gulong a_green, gulong a_blue, + gboolean a_is_percentage) +{ + g_return_val_if_fail (a_this, CR_BAD_PARAM_ERROR) ; + if (a_is_percentage != FALSE) + { + g_return_val_if_fail (a_red <= 100 + && a_green <= 100 + && a_blue <= 100, + CR_BAD_PARAM_ERROR) ; + } + + a_this->is_percentage = a_is_percentage ; + + a_this->red = a_red ; + a_this->green = a_green ; + if (a_is_percentage != FALSE) + { + if (a_red + a_green >= 100) + { + a_green = 100 - a_red ; + } + a_this->blue = 100 - a_red - a_green ; + } + else + { + a_this->blue = a_blue ; + } + + return CR_OK ; +} + +/** + *Sets the rgb from an other one. + *@param a_this the current instance of #CRRgb. + *@param a_rgb the rgb to "copy" + *@return CR_OK upon successfull completion, an error code otherwise. + */ +enum CRStatus +cr_rgb_set_from_rgb (CRRgb *a_this, CRRgb *a_rgb) +{ + g_return_val_if_fail (a_this && a_rgb, + CR_BAD_PARAM_ERROR) ; + + cr_rgb_set (a_this, a_rgb->red, a_rgb->green, + a_rgb->blue, a_rgb->is_percentage) ; + + return CR_OK ; +} + + +enum CRStatus +cr_rgb_set_from_name (CRRgb *a_this, const guchar *a_color_name) +{ + gulong i = 0 ; + enum CRStatus status = CR_OK ; + + g_return_val_if_fail (a_this && a_color_name, CR_BAD_PARAM_ERROR) ; + + for (i = 0 ; i < sizeof (gv_standard_colors); i++) + { + if (!strcmp (a_color_name, gv_standard_colors[i].name)) + { + cr_rgb_set_from_rgb (a_this, &gv_standard_colors[i]) ; + break ; + } + } + + if (i < sizeof (gv_standard_colors)) + status = CR_OK ; + else + status = CR_UNKNOWN_TYPE_ERROR ; + + return status ; +} + +enum CRStatus +cr_rgb_set_from_hex_str (CRRgb *a_this, const guchar * a_hex) +{ + enum CRStatus status = CR_OK ; + gulong i = 0 ; + guchar colors[3] = {0} ; + + g_return_val_if_fail (a_this && a_hex, + CR_BAD_PARAM_ERROR) ; + + if (strlen (a_hex) == 3) + { + for (i = 0 ;i < 3 ; i++) + { + switch (a_hex[i]) + { + case '0' ... '9': + colors[i] = a_hex[i] - '0'; + colors[i] = (colors[i] << 4) | colors[i] ; + break ; + + case 'a' ... 'z': + colors[i] = 10 + a_hex[i] - 'a'; + colors[i] = (colors[i] << 4) | colors[i] ; + break ; + + case 'A' ... 'Z': + colors[i] = 10 + a_hex[i] - 'A'; + colors[i] = (colors[i] << 4) | colors[i] ; + break ; + default: + status = CR_UNKNOWN_TYPE_ERROR ; + } + } + } + else if (strlen (a_hex) == 6) + { + for (i = 0 ; i < 6 ; i++) + { + + switch (a_hex[i]) + { + case '0' ... '9': + colors[i/2] <<= 4 ; + colors[i/2] |= a_hex[i] - '0'; + status = CR_OK ; + break ; + + case 'a' ... 'z': + colors[i/2] <<= 4 ; + colors[i/2] |= 10 + a_hex[i] - 'a'; + status = CR_OK ; + break ; + + case 'A' ... 'Z': + colors[i/2] <<= 4 ; + colors[i/2] |= 10 + a_hex[i] - 'A'; + status = CR_OK ; + break ; + + default: + status = CR_UNKNOWN_TYPE_ERROR ; + } + } + } + else + { + status = CR_UNKNOWN_TYPE_ERROR ; + } + + if (status == CR_OK) + { + status = cr_rgb_set (a_this, colors[0], + colors[1], colors[2], + FALSE) ; + } + return status ; +} + +/** + *Destructor of #CRRgb. + *@param a_this the "this pointer" of the + *current instance of #CRRgb. + */ +void +cr_rgb_destroy (CRRgb *a_this) +{ + g_return_if_fail (a_this) ; + + g_free (a_this) ; +} |