/* * Clutter. * * An OpenGL based 'interactive canvas' library. * * Authored By Matthew Allum * * Copyright (C) 2006 OpenedHand * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see . */ /** * SECTION:clutter-color * @short_description: Color management and manipulation. * * #ClutterColor is a simple type for representing colors in Clutter. * * A #ClutterColor is expressed as a 4-tuple of values ranging from * zero to 255, one for each color channel plus one for the alpha. * * The alpha channel is fully opaque at 255 and fully transparent at 0. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "clutter-interval.h" #include "clutter-main.h" #include "clutter-color.h" #include "clutter-private.h" #include "clutter-debug.h" /* XXX - keep in sync with the ClutterStaticColor enumeration order */ static const ClutterColor const static_colors[] = { /* CGA/EGA color palette */ { 0xff, 0xff, 0xff, 0xff }, /* white */ { 0x00, 0x00, 0x00, 0xff }, /* black */ { 0xff, 0x00, 0x00, 0xff }, /* red */ { 0x80, 0x00, 0x00, 0xff }, /* dark red */ { 0x00, 0xff, 0x00, 0xff }, /* green */ { 0x00, 0x80, 0x00, 0xff }, /* dark green */ { 0x00, 0x00, 0xff, 0xff }, /* blue */ { 0x00, 0x00, 0x80, 0xff }, /* dark blue */ { 0x00, 0xff, 0xff, 0xff }, /* cyan */ { 0x00, 0x80, 0x80, 0xff }, /* dark cyan */ { 0xff, 0x00, 0xff, 0xff }, /* magenta */ { 0x80, 0x00, 0x80, 0xff }, /* dark magenta */ { 0xff, 0xff, 0x00, 0xff }, /* yellow */ { 0x80, 0x80, 0x00, 0xff }, /* dark yellow */ { 0xa0, 0xa0, 0xa4, 0xff }, /* gray */ { 0x80, 0x80, 0x80, 0xff }, /* dark gray */ { 0xc0, 0xc0, 0xc0, 0xff }, /* light gray */ /* Tango Icon color palette */ { 0xed, 0xd4, 0x00, 0xff }, /* butter */ { 0xfc, 0xe9, 0x4f, 0xff }, /* butter light */ { 0xc4, 0xa0, 0x00, 0xff }, /* butter dark */ { 0xf5, 0x79, 0x00, 0xff }, /* orange */ { 0xfc, 0xaf, 0x3e, 0xff }, /* orange light */ { 0xce, 0x5c, 0x00, 0xff }, /* orange dark */ { 0xc1, 0x7d, 0x11, 0xff }, /* chocolate */ { 0xe9, 0xb9, 0x6e, 0xff }, /* chocolate light */ { 0x8f, 0x59, 0x02, 0xff }, /* chocolate dark */ { 0x73, 0xd2, 0x16, 0xff }, /* chameleon */ { 0x8a, 0xe2, 0x34, 0xff }, /* chameleon light */ { 0x4e, 0x9a, 0x06, 0xff }, /* chameleon dark */ { 0x34, 0x65, 0xa4, 0xff }, /* sky blue */ { 0x72, 0x9f, 0xcf, 0xff }, /* sky blue light */ { 0x20, 0x4a, 0x87, 0xff }, /* sky blue dark */ { 0x75, 0x50, 0x7b, 0xff }, /* plum */ { 0xad, 0x7f, 0xa8, 0xff }, /* plum light */ { 0x5c, 0x35, 0x66, 0xff }, /* plum dark */ { 0xcc, 0x00, 0x00, 0xff }, /* scarlet red */ { 0xef, 0x29, 0x29, 0xff }, /* scarlet red light */ { 0xa4, 0x00, 0x00, 0xff }, /* scarlet red dark */ { 0xee, 0xee, 0xec, 0xff }, /* aluminium 1 */ { 0xd3, 0xd7, 0xcf, 0xff }, /* aluminium 2 */ { 0xba, 0xbd, 0xb6, 0xff }, /* aluminium 3 */ { 0x88, 0x8a, 0x85, 0xff }, /* aluminium 4 */ { 0x55, 0x57, 0x53, 0xff }, /* aluminium 5 */ { 0x2e, 0x34, 0x36, 0xff }, /* aluminium 6 */ /* last color */ { 0x00, 0x00, 0x00, 0x00 } /* transparent */ }; /** * clutter_color_get_static: * @color: the named global color * * Retrieves a static color for the given @color name * * Static colors are created by Clutter and are guaranteed to always be * available and valid * * Return value: a pointer to a static color; the returned pointer * is owned by Clutter and it should never be modified or freed * * Since: 1.6 */ const ClutterColor * clutter_color_get_static (ClutterStaticColor color) { g_return_val_if_fail (color >= CLUTTER_COLOR_WHITE && color <= CLUTTER_COLOR_TRANSPARENT, NULL); return &static_colors[color]; } /** * clutter_color_add: * @a: a #ClutterColor * @b: a #ClutterColor * @result: (out caller-allocates): return location for the result * * Adds @a to @b and saves the resulting color inside @result. * * The alpha channel of @result is set as as the maximum value * between the alpha channels of @a and @b. */ void clutter_color_add (const ClutterColor *a, const ClutterColor *b, ClutterColor *result) { g_return_if_fail (a != NULL); g_return_if_fail (b != NULL); g_return_if_fail (result != NULL); result->red = CLAMP (a->red + b->red, 0, 255); result->green = CLAMP (a->green + b->green, 0, 255); result->blue = CLAMP (a->blue + b->blue, 0, 255); result->alpha = MAX (a->alpha, b->alpha); } /** * clutter_color_subtract: * @a: a #ClutterColor * @b: a #ClutterColor * @result: (out caller-allocates): return location for the result * * Subtracts @b from @a and saves the resulting color inside @result. * * This function assumes that the components of @a are greater than the * components of @b; the result is, otherwise, undefined. * * The alpha channel of @result is set as the minimum value * between the alpha channels of @a and @b. */ void clutter_color_subtract (const ClutterColor *a, const ClutterColor *b, ClutterColor *result) { g_return_if_fail (a != NULL); g_return_if_fail (b != NULL); g_return_if_fail (result != NULL); result->red = CLAMP (a->red - b->red, 0, 255); result->green = CLAMP (a->green - b->green, 0, 255); result->blue = CLAMP (a->blue - b->blue, 0, 255); result->alpha = MIN (a->alpha, b->alpha); } /** * clutter_color_lighten: * @color: a #ClutterColor * @result: (out caller-allocates): return location for the lighter color * * Lightens @color by a fixed amount, and saves the changed color * in @result. */ void clutter_color_lighten (const ClutterColor *color, ClutterColor *result) { clutter_color_shade (color, 1.3, result); } /** * clutter_color_darken: * @color: a #ClutterColor * @result: (out caller-allocates): return location for the darker color * * Darkens @color by a fixed amount, and saves the changed color * in @result. */ void clutter_color_darken (const ClutterColor *color, ClutterColor *result) { clutter_color_shade (color, 0.7, result); } /** * clutter_color_to_hls: * @color: a #ClutterColor * @hue: (out): return location for the hue value or %NULL * @luminance: (out): return location for the luminance value or %NULL * @saturation: (out): return location for the saturation value or %NULL * * Converts @color to the HLS format. * * The @hue value is in the 0 .. 360 range. The @luminance and * @saturation values are in the 0 .. 1 range. */ void clutter_color_to_hls (const ClutterColor *color, float *hue, float *luminance, float *saturation) { float red, green, blue; float min, max, delta; float h, l, s; g_return_if_fail (color != NULL); red = color->red / 255.0; green = color->green / 255.0; blue = color->blue / 255.0; if (red > green) { if (red > blue) max = red; else max = blue; if (green < blue) min = green; else min = blue; } else { if (green > blue) max = green; else max = blue; if (red < blue) min = red; else min = blue; } l = (max + min) / 2; s = 0; h = 0; if (max != min) { if (l <= 0.5) s = (max - min) / (max + min); else s = (max - min) / (2.0 - max - min); delta = max - min; if (red == max) h = (green - blue) / delta; else if (green == max) h = 2.0 + (blue - red) / delta; else if (blue == max) h = 4.0 + (red - green) / delta; h *= 60; if (h < 0) h += 360.0; } if (hue) *hue = h; if (luminance) *luminance = l; if (saturation) *saturation = s; } /** * clutter_color_from_hls: * @color: (out): return location for a #ClutterColor * @hue: hue value, in the 0 .. 360 range * @luminance: luminance value, in the 0 .. 1 range * @saturation: saturation value, in the 0 .. 1 range * * Converts a color expressed in HLS (hue, luminance and saturation) * values into a #ClutterColor. */ void clutter_color_from_hls (ClutterColor *color, float hue, float luminance, float saturation) { float tmp1, tmp2; float tmp3[3]; float clr[3]; int i; hue /= 360.0; if (saturation == 0) { color->red = color->green = color->blue = (luminance * 255); return; } if (luminance <= 0.5) tmp2 = luminance * (1.0 + saturation); else tmp2 = luminance + saturation - (luminance * saturation); tmp1 = 2.0 * luminance - tmp2; tmp3[0] = hue + 1.0 / 3.0; tmp3[1] = hue; tmp3[2] = hue - 1.0 / 3.0; for (i = 0; i < 3; i++) { if (tmp3[i] < 0) tmp3[i] += 1.0; if (tmp3[i] > 1) tmp3[i] -= 1.0; if (6.0 * tmp3[i] < 1.0) clr[i] = tmp1 + (tmp2 - tmp1) * tmp3[i] * 6.0; else if (2.0 * tmp3[i] < 1.0) clr[i] = tmp2; else if (3.0 * tmp3[i] < 2.0) clr[i] = (tmp1 + (tmp2 - tmp1) * ((2.0 / 3.0) - tmp3[i]) * 6.0); else clr[i] = tmp1; } color->red = floorf (clr[0] * 255.0 + 0.5); color->green = floorf (clr[1] * 255.0 + 0.5); color->blue = floorf (clr[2] * 255.0 + 0.5); } /** * clutter_color_shade: * @color: a #ClutterColor * @factor: the shade factor to apply * @result: (out caller-allocates): return location for the shaded color * * Shades @color by @factor and saves the modified color into @result. */ void clutter_color_shade (const ClutterColor *color, gdouble factor, ClutterColor *result) { float h, l, s; g_return_if_fail (color != NULL); g_return_if_fail (result != NULL); clutter_color_to_hls (color, &h, &l, &s); l *= factor; if (l > 1.0) l = 1.0; else if (l < 0) l = 0; s *= factor; if (s > 1.0) s = 1.0; else if (s < 0) s = 0; clutter_color_from_hls (result, h, l, s); result->alpha = color->alpha; } /** * clutter_color_to_pixel: * @color: a #ClutterColor * * Converts @color into a packed 32 bit integer, containing * all the four 8 bit channels used by #ClutterColor. * * Return value: a packed color */ guint32 clutter_color_to_pixel (const ClutterColor *color) { g_return_val_if_fail (color != NULL, 0); return (color->alpha | color->blue << 8 | color->green << 16 | color->red << 24); } /** * clutter_color_from_pixel: * @color: (out caller-allocates): return location for a #ClutterColor * @pixel: a 32 bit packed integer containing a color * * Converts @pixel from the packed representation of a four 8 bit channel * color to a #ClutterColor. */ void clutter_color_from_pixel (ClutterColor *color, guint32 pixel) { g_return_if_fail (color != NULL); color->red = pixel >> 24; color->green = (pixel >> 16) & 0xff; color->blue = (pixel >> 8) & 0xff; color->alpha = pixel & 0xff; } static inline void skip_whitespace (gchar **str) { while (g_ascii_isspace (**str)) *str += 1; } static inline void parse_rgb_value (gchar *str, guint8 *color, gchar **endp) { gdouble number; gchar *p; skip_whitespace (&str); number = g_ascii_strtod (str, endp); p = *endp; skip_whitespace (&p); if (*p == '%') { *endp = (gchar *) (p + 1); *color = CLAMP (number / 100.0, 0.0, 1.0) * 255; } else *color = CLAMP (number, 0, 255); } static gboolean parse_rgba (ClutterColor *color, gchar *str, gboolean has_alpha) { skip_whitespace (&str); if (*str != '(') return FALSE; str += 1; /* red */ parse_rgb_value (str, &color->red, &str); skip_whitespace (&str); if (*str != ',') return FALSE; str += 1; /* green */ parse_rgb_value (str, &color->green, &str); skip_whitespace (&str); if (*str != ',') return FALSE; str += 1; /* blue */ parse_rgb_value (str, &color->blue, &str); skip_whitespace (&str); /* alpha (optional); since the alpha channel value can only * be between 0 and 1 we don't use the parse_rgb_value() * function */ if (has_alpha) { gdouble number; if (*str != ',') return FALSE; str += 1; skip_whitespace (&str); number = g_ascii_strtod (str, &str); color->alpha = CLAMP (number * 255.0, 0, 255); } else color->alpha = 255; skip_whitespace (&str); if (*str != ')') return FALSE; return TRUE; } static gboolean parse_hsla (ClutterColor *color, gchar *str, gboolean has_alpha) { gdouble number; gdouble h, l, s; skip_whitespace (&str); if (*str != '(') return FALSE; str += 1; /* hue */ skip_whitespace (&str); /* we don't do any angle normalization here because * clutter_color_from_hls() will do it for us */ number = g_ascii_strtod (str, &str); skip_whitespace (&str); if (*str != ',') return FALSE; h = number; str += 1; /* saturation */ skip_whitespace (&str); number = g_ascii_strtod (str, &str); skip_whitespace (&str); if (*str != '%') return FALSE; str += 1; s = CLAMP (number / 100.0, 0.0, 1.0); skip_whitespace (&str); if (*str != ',') return FALSE; str += 1; /* luminance */ skip_whitespace (&str); number = g_ascii_strtod (str, &str); skip_whitespace (&str); if (*str != '%') return FALSE; str += 1; l = CLAMP (number / 100.0, 0.0, 1.0); skip_whitespace (&str); /* alpha (optional); since the alpha channel value can only * be between 0 and 1 we don't use the parse_rgb_value() * function */ if (has_alpha) { if (*str != ',') return FALSE; str += 1; skip_whitespace (&str); number = g_ascii_strtod (str, &str); color->alpha = CLAMP (number * 255.0, 0, 255); } else color->alpha = 255; skip_whitespace (&str); if (*str != ')') return FALSE; clutter_color_from_hls (color, h, l, s); return TRUE; } /** * clutter_color_from_string: * @color: (out caller-allocates): return location for a #ClutterColor * @str: a string specifiying a color * * Parses a string definition of a color, filling the * red, green, * blue and alpha * channels of @color. * * The @color is not allocated. * * The format of @str can be either one of: * * * * a standard name (as taken from the X11 rgb.txt file) * * * an hexadecimal value in the form: #rgb, * #rrggbb, #rgba or * #rrggbbaa * * * a RGB color in the form: rgb(r, g, b) * * * a RGB color in the form: rgba(r, g, b, a) * * * a HSL color in the form: hsl(h, s, l) * * * a HSL color in the form: hsla(h, s, l, a) * * * * where 'r', 'g', 'b' and 'a' are (respectively) the red, green, blue color * intensities and the opacity. The 'h', 's' and 'l' are (respectively) the * hue, saturation and luminance values. * * In the rgb() and rgba() formats, the 'r', 'g', and 'b' values are either * integers between 0 and 255, or percentage values in the range between 0% * and 100%; the percentages require the '%' character. The 'a' value, if * specified, can only be a floating point value between 0.0 and 1.0. * * In the hls() and hlsa() formats, the 'h' value (hue) it's an angle between * 0 and 360.0 degrees; the 'l' and 's' values (luminance and saturation) are * a floating point value between 0.0 and 1.0. The 'a' value, if specified, * can only be a floating point value between 0.0 and 1.0. * * Whitespace inside the definitions is ignored; no leading whitespace * is allowed. * * If the alpha component is not specified then it is assumed to be set to * be fully opaque. * * Return value: %TRUE if parsing succeeded, and %FALSE otherwise * * Since: 1.0 */ gboolean clutter_color_from_string (ClutterColor *color, const gchar *str) { PangoColor pango_color = { 0, }; g_return_val_if_fail (color != NULL, FALSE); g_return_val_if_fail (str != NULL, FALSE); if (strncmp (str, "rgb", 3) == 0) { gchar *s = (gchar *) str; gboolean res; if (strncmp (str, "rgba", 4) == 0) res = parse_rgba (color, s + 4, TRUE); else res = parse_rgba (color, s + 3, FALSE); return res; } if (strncmp (str, "hsl", 3) == 0) { gchar *s = (gchar *) str; gboolean res; if (strncmp (str, "hsla", 4) == 0) res = parse_hsla (color, s + 4, TRUE); else res = parse_hsla (color, s + 3, FALSE); return res; } /* if the string contains a color encoded using the hexadecimal * notations (#rrggbbaa or #rgba) we attempt a rough pass at * parsing the color ourselves, as we need the alpha channel that * Pango can't retrieve. */ if (str[0] == '#') { gint32 result; if (sscanf (str + 1, "%x", &result)) { gsize length = strlen (str); switch (length) { case 9: /* rrggbbaa */ color->red = (result >> 24) & 0xff; color->green = (result >> 16) & 0xff; color->blue = (result >> 8) & 0xff; color->alpha = result & 0xff; return TRUE; case 7: /* #rrggbb */ color->red = (result >> 16) & 0xff; color->green = (result >> 8) & 0xff; color->blue = result & 0xff; color->alpha = 0xff; return TRUE; case 5: /* #rgba */ color->red = ((result >> 12) & 0xf); color->green = ((result >> 8) & 0xf); color->blue = ((result >> 4) & 0xf); color->alpha = result & 0xf; color->red = (color->red << 4) | color->red; color->green = (color->green << 4) | color->green; color->blue = (color->blue << 4) | color->blue; color->alpha = (color->alpha << 4) | color->alpha; return TRUE; case 4: /* #rgb */ color->red = ((result >> 8) & 0xf); color->green = ((result >> 4) & 0xf); color->blue = result & 0xf; color->red = (color->red << 4) | color->red; color->green = (color->green << 4) | color->green; color->blue = (color->blue << 4) | color->blue; color->alpha = 0xff; return TRUE; default: /* pass through to Pango */ break; } } } /* Fall back to pango for named colors */ if (pango_color_parse (&pango_color, str)) { color->red = pango_color.red; color->green = pango_color.green; color->blue = pango_color.blue; color->alpha = 0xff; return TRUE; } return FALSE; } /** * clutter_color_to_string: * @color: a #ClutterColor * * Returns a textual specification of @color in the hexadecimal form * #rrggbbaa, where r, * g, b and a are * hexadecimal digits representing the red, green, blue and alpha components * respectively. * * Return value: (transfer full): a newly-allocated text string * * Since: 0.2 */ gchar * clutter_color_to_string (const ClutterColor *color) { g_return_val_if_fail (color != NULL, NULL); return g_strdup_printf ("#%02x%02x%02x%02x", color->red, color->green, color->blue, color->alpha); } /** * clutter_color_equal: * @v1: a #ClutterColor * @v2: a #ClutterColor * * Compares two #ClutterColors and checks if they are the same. * * This function can be passed to g_hash_table_new() as the @key_equal_func * parameter, when using #ClutterColors as keys in a #GHashTable. * * Return value: %TRUE if the two colors are the same. * * Since: 0.2 */ gboolean clutter_color_equal (gconstpointer v1, gconstpointer v2) { const ClutterColor *a, *b; g_return_val_if_fail (v1 != NULL, FALSE); g_return_val_if_fail (v2 != NULL, FALSE); if (v1 == v2) return TRUE; a = v1; b = v2; return (a->red == b->red && a->green == b->green && a->blue == b->blue && a->alpha == b->alpha); } /** * clutter_color_hash: * @v: a #ClutterColor * * Converts a #ClutterColor to a hash value. * * This function can be passed to g_hash_table_new() as the @hash_func * parameter, when using #ClutterColors as keys in a #GHashTable. * * Return value: a hash value corresponding to the color * * Since: 1.0 */ guint clutter_color_hash (gconstpointer v) { return clutter_color_to_pixel ((const ClutterColor *) v); } /** * clutter_color_interpolate: * @initial: the initial #ClutterColor * @final: the final #ClutterColor * @progress: the interpolation progress * @result: (out): return location for the interpolation * * Interpolates between @initial and @final #ClutterColors * using @progress * * Since: 1.6 */ void clutter_color_interpolate (const ClutterColor *initial, const ClutterColor *final, gdouble progress, ClutterColor *result) { g_return_if_fail (initial != NULL); g_return_if_fail (final != NULL); g_return_if_fail (result != NULL); result->red = initial->red + (final->red - initial->red) * progress; result->green = initial->green + (final->green - initial->green) * progress; result->blue = initial->blue + (final->blue - initial->blue) * progress; result->alpha = initial->alpha + (final->alpha - initial->alpha) * progress; } static gboolean clutter_color_progress (const GValue *a, const GValue *b, gdouble progress, GValue *retval) { const ClutterColor *a_color = clutter_value_get_color (a); const ClutterColor *b_color = clutter_value_get_color (b); ClutterColor res = { 0, }; clutter_color_interpolate (a_color, b_color, progress, &res); clutter_value_set_color (retval, &res); return TRUE; } /** * clutter_color_copy: * @color: a #ClutterColor * * Makes a copy of the color structure. The result must be * freed using clutter_color_free(). * * Return value: (transfer full): an allocated copy of @color. * * Since: 0.2 */ ClutterColor * clutter_color_copy (const ClutterColor *color) { if (G_LIKELY (color != NULL)) return g_slice_dup (ClutterColor, color); return NULL; } /** * clutter_color_free: * @color: a #ClutterColor * * Frees a color structure created with clutter_color_copy(). * * Since: 0.2 */ void clutter_color_free (ClutterColor *color) { if (G_LIKELY (color != NULL)) g_slice_free (ClutterColor, color); } /** * clutter_color_new: * @red: red component of the color, between 0 and 255 * @green: green component of the color, between 0 and 255 * @blue: blue component of the color, between 0 and 255 * @alpha: alpha component of the color, between 0 and 255 * * Creates a new #ClutterColor with the given values. * * Return value: (transfer full): the newly allocated color. * Use clutter_color_free() when done * * Since: 0.8.4 */ ClutterColor * clutter_color_new (guint8 red, guint8 green, guint8 blue, guint8 alpha) { ClutterColor *color; color = g_slice_new (ClutterColor); color->red = red; color->green = green; color->blue = blue; color->alpha = alpha; return color; } static void clutter_value_transform_color_string (const GValue *src, GValue *dest) { const ClutterColor *color = g_value_get_boxed (src); if (color) { gchar *string = clutter_color_to_string (color); g_value_take_string (dest, string); } else g_value_set_string (dest, NULL); } static void clutter_value_transform_string_color (const GValue *src, GValue *dest) { const char *str = g_value_get_string (src); if (str) { ClutterColor color = { 0, }; clutter_color_from_string (&color, str); clutter_value_set_color (dest, &color); } else clutter_value_set_color (dest, NULL); } G_DEFINE_BOXED_TYPE_WITH_CODE (ClutterColor, clutter_color, clutter_color_copy, clutter_color_free, CLUTTER_REGISTER_VALUE_TRANSFORM_TO (G_TYPE_STRING, clutter_value_transform_color_string) CLUTTER_REGISTER_VALUE_TRANSFORM_FROM (G_TYPE_STRING, clutter_value_transform_string_color) CLUTTER_REGISTER_INTERVAL_PROGRESS (clutter_color_progress)); /** * clutter_value_set_color: * @value: a #GValue initialized to #CLUTTER_TYPE_COLOR * @color: the color to set * * Sets @value to @color. * * Since: 0.8.4 */ void clutter_value_set_color (GValue *value, const ClutterColor *color) { g_return_if_fail (CLUTTER_VALUE_HOLDS_COLOR (value)); g_value_set_boxed (value, color); } /** * clutter_value_get_color: * @value: a #GValue initialized to #CLUTTER_TYPE_COLOR * * Gets the #ClutterColor contained in @value. * * Return value: (transfer none): the color inside the passed #GValue * * Since: 0.8.4 */ const ClutterColor * clutter_value_get_color (const GValue *value) { g_return_val_if_fail (CLUTTER_VALUE_HOLDS_COLOR (value), NULL); return g_value_get_boxed (value); } static void param_color_init (GParamSpec *pspec) { ClutterParamSpecColor *cspec = CLUTTER_PARAM_SPEC_COLOR (pspec); cspec->default_value = NULL; } static void param_color_finalize (GParamSpec *pspec) { ClutterParamSpecColor *cspec = CLUTTER_PARAM_SPEC_COLOR (pspec); clutter_color_free (cspec->default_value); } static void param_color_set_default (GParamSpec *pspec, GValue *value) { const ClutterColor *default_value = CLUTTER_PARAM_SPEC_COLOR (pspec)->default_value; clutter_value_set_color (value, default_value); } static gint param_color_values_cmp (GParamSpec *pspec, const GValue *value1, const GValue *value2) { const ClutterColor *color1 = g_value_get_boxed (value1); const ClutterColor *color2 = g_value_get_boxed (value2); int pixel1, pixel2; if (color1 == NULL) return color2 == NULL ? 0 : -1; pixel1 = clutter_color_to_pixel (color1); pixel2 = clutter_color_to_pixel (color2); if (pixel1 < pixel2) return -1; else if (pixel1 == pixel2) return 0; else return 1; } GType clutter_param_color_get_type (void) { static GType pspec_type = 0; if (G_UNLIKELY (pspec_type == 0)) { const GParamSpecTypeInfo pspec_info = { sizeof (ClutterParamSpecColor), 16, param_color_init, CLUTTER_TYPE_COLOR, param_color_finalize, param_color_set_default, NULL, param_color_values_cmp, }; pspec_type = g_param_type_register_static (I_("ClutterParamSpecColor"), &pspec_info); } return pspec_type; } /** * clutter_param_spec_color: (skip) * @name: name of the property * @nick: short name * @blurb: description (can be translatable) * @default_value: default value * @flags: flags for the param spec * * Creates a #GParamSpec for properties using #ClutterColor. * * Return value: the newly created #GParamSpec * * Since: 0.8.4 */ GParamSpec * clutter_param_spec_color (const gchar *name, const gchar *nick, const gchar *blurb, const ClutterColor *default_value, GParamFlags flags) { ClutterParamSpecColor *cspec; cspec = g_param_spec_internal (CLUTTER_TYPE_PARAM_COLOR, name, nick, blurb, flags); cspec->default_value = clutter_color_copy (default_value); return G_PARAM_SPEC (cspec); }