1 /* GDK - The GIMP Drawing Kit
4 * Copyright 2001 Sun Microsystems Inc.
6 * Erwann Chenede <erwann.chenede@sun.com>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
25 #include "gdkvisual.h"
26 #include "gdkscreen.h"
32 * Lists the available visuals for the default screen.
33 * (See gdk_screen_list_visuals())
34 * A visual describes a hardware image data format.
35 * For example, a visual might support 24-bit color, or 8-bit color,
36 * and might expect pixels to be in a certain format.
38 * Call g_list_free() on the return value when you're finished with it.
40 * Return value: a list of visuals; the list must be freed, but not its contents
43 gdk_list_visuals (void)
45 return gdk_screen_list_visuals (gdk_screen_get_default ());
49 * gdk_visual_get_system:
51 * Get the system's default visual for the default GDK screen.
52 * This is the visual for the root window of the display.
53 * The return value should not be freed.
55 * Return value: (transfer none): system visual
58 gdk_visual_get_system (void)
60 return gdk_screen_get_system_visual (gdk_screen_get_default());
64 * gdk_visual_get_visual_type:
65 * @visual: A #GdkVisual.
67 * Returns the type of visual this is (PseudoColor, TrueColor, etc).
69 * Return value: A #GdkVisualType stating the type of @visual.
74 gdk_visual_get_visual_type (GdkVisual *visual)
76 g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
82 * gdk_visual_get_depth:
83 * @visual: A #GdkVisual.
85 * Returns the bit depth of this visual.
87 * Return value: The bit depth of this visual.
92 gdk_visual_get_depth (GdkVisual *visual)
94 g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
100 * gdk_visual_get_byte_order:
101 * @visual: A #GdkVisual.
103 * Returns the byte order of this visual.
105 * Return value: A #GdkByteOrder stating the byte order of @visual.
110 gdk_visual_get_byte_order (GdkVisual *visual)
112 g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
114 return visual->byte_order;
118 * gdk_visual_get_colormap_size:
119 * @visual: A #GdkVisual.
121 * Returns the size of a colormap for this visual.
123 * Return value: The size of a colormap that is suitable for @visual.
128 gdk_visual_get_colormap_size (GdkVisual *visual)
130 g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
132 return visual->colormap_size;
136 * gdk_visual_get_bits_per_rgb:
137 * @visual: a #GdkVisual
139 * Returns the number of significant bits per red, green and blue value.
141 * Return value: The number of significant bits per color value for @visual.
146 gdk_visual_get_bits_per_rgb (GdkVisual *visual)
148 g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
150 return visual->bits_per_rgb;
154 * gdk_visual_get_red_pixel_details:
155 * @visual: A #GdkVisual.
156 * @mask: (out) (allow-none): A pointer to a #guint32 to be filled in, or %NULL.
157 * @shift: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
158 * @precision: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
160 * Obtains values that are needed to calculate red pixel values in TrueColor
161 * and DirectColor. The "mask" is the significant bits within the pixel.
162 * The "shift" is the number of bits left we must shift a primary for it
163 * to be in position (according to the "mask"). Finally, "precision" refers
164 * to how much precision the pixel value contains for a particular primary.
169 gdk_visual_get_red_pixel_details (GdkVisual *visual,
174 g_return_if_fail (GDK_IS_VISUAL (visual));
177 *mask = visual->red_mask;
180 *shift = visual->red_shift;
183 *precision = visual->red_prec;
187 * gdk_visual_get_green_pixel_details:
188 * @visual: a #GdkVisual
189 * @mask: (out) (allow-none): A pointer to a #guint32 to be filled in, or %NULL.
190 * @shift: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
191 * @precision: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
193 * Obtains values that are needed to calculate green pixel values in TrueColor
194 * and DirectColor. The "mask" is the significant bits within the pixel.
195 * The "shift" is the number of bits left we must shift a primary for it
196 * to be in position (according to the "mask"). Finally, "precision" refers
197 * to how much precision the pixel value contains for a particular primary.
202 gdk_visual_get_green_pixel_details (GdkVisual *visual,
207 g_return_if_fail (GDK_IS_VISUAL (visual));
210 *mask = visual->green_mask;
213 *shift = visual->green_shift;
216 *precision = visual->green_prec;
220 * gdk_visual_get_blue_pixel_details:
221 * @visual: a #GdkVisual
222 * @mask: (out) (allow-none): A pointer to a #guint32 to be filled in, or %NULL.
223 * @shift: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
224 * @precision: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
226 * Obtains values that are needed to calculate blue pixel values in TrueColor
227 * and DirectColor. The "mask" is the significant bits within the pixel.
228 * The "shift" is the number of bits left we must shift a primary for it
229 * to be in position (according to the "mask"). Finally, "precision" refers
230 * to how much precision the pixel value contains for a particular primary.
235 gdk_visual_get_blue_pixel_details (GdkVisual *visual,
240 g_return_if_fail (GDK_IS_VISUAL (visual));
243 *mask = visual->blue_mask;
246 *shift = visual->blue_shift;
249 *precision = visual->blue_prec;
252 #define __GDK_VISUAL_C__
253 #include "gdkaliasdef.c"