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/* GDK - The GIMP Drawing Kit
* gdkvisual.c
*
* Copyright 2001 Sun Microsystems Inc.
*
* Erwann Chenede <erwann.chenede@sun.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gdkvisual.h"
#include "gdkscreen.h"
#include "gdkalias.h"
/**
* gdk_list_visuals:
*
* Lists the available visuals for the default screen.
* (See gdk_screen_list_visuals())
* A visual describes a hardware image data format.
* For example, a visual might support 24-bit color, or 8-bit color,
* and might expect pixels to be in a certain format.
*
* Call g_list_free() on the return value when you're finished with it.
*
* Return value: a list of visuals; the list must be freed, but not its contents
**/
GList*
gdk_list_visuals (void)
{
return gdk_screen_list_visuals (gdk_screen_get_default ());
}
/**
* gdk_visual_get_system:
*
* Get the system's default visual for the default GDK screen.
* This is the visual for the root window of the display.
* The return value should not be freed.
*
* Return value: (transfer none): system visual
**/
GdkVisual*
gdk_visual_get_system (void)
{
return gdk_screen_get_system_visual (gdk_screen_get_default());
}
/**
* gdk_visual_get_visual_type:
* @visual: A #GdkVisual.
*
* Returns the type of visual this is (PseudoColor, TrueColor, etc).
*
* Return value: A #GdkVisualType stating the type of @visual.
*
* Since: 2.22
*/
GdkVisualType
gdk_visual_get_visual_type (GdkVisual *visual)
{
g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
return visual->type;
}
/**
* gdk_visual_get_depth:
* @visual: A #GdkVisual.
*
* Returns the bit depth of this visual.
*
* Return value: The bit depth of this visual.
*
* Since: 2.22
*/
gint
gdk_visual_get_depth (GdkVisual *visual)
{
g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
return visual->depth;
}
/**
* gdk_visual_get_byte_order:
* @visual: A #GdkVisual.
*
* Returns the byte order of this visual.
*
* Return value: A #GdkByteOrder stating the byte order of @visual.
*
* Since: 2.22
*/
GdkByteOrder
gdk_visual_get_byte_order (GdkVisual *visual)
{
g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
return visual->byte_order;
}
/**
* gdk_visual_get_colormap_size:
* @visual: A #GdkVisual.
*
* Returns the size of a colormap for this visual.
*
* Return value: The size of a colormap that is suitable for @visual.
*
* Since: 2.22
*/
gint
gdk_visual_get_colormap_size (GdkVisual *visual)
{
g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
return visual->colormap_size;
}
/**
* gdk_visual_get_bits_per_rgb:
* @visual: a #GdkVisual
*
* Returns the number of significant bits per red, green and blue value.
*
* Return value: The number of significant bits per color value for @visual.
*
* Since: 2.22
*/
gint
gdk_visual_get_bits_per_rgb (GdkVisual *visual)
{
g_return_val_if_fail (GDK_IS_VISUAL (visual), 0);
return visual->bits_per_rgb;
}
/**
* gdk_visual_get_red_pixel_details:
* @visual: A #GdkVisual.
* @mask: (out) (allow-none): A pointer to a #guint32 to be filled in, or %NULL.
* @shift: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
* @precision: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
*
* Obtains values that are needed to calculate red pixel values in TrueColor
* and DirectColor. The "mask" is the significant bits within the pixel.
* The "shift" is the number of bits left we must shift a primary for it
* to be in position (according to the "mask"). Finally, "precision" refers
* to how much precision the pixel value contains for a particular primary.
*
* Since: 2.22
*/
void
gdk_visual_get_red_pixel_details (GdkVisual *visual,
guint32 *mask,
gint *shift,
gint *precision)
{
g_return_if_fail (GDK_IS_VISUAL (visual));
if (mask)
*mask = visual->red_mask;
if (shift)
*shift = visual->red_shift;
if (precision)
*precision = visual->red_prec;
}
/**
* gdk_visual_get_green_pixel_details:
* @visual: a #GdkVisual
* @mask: (out) (allow-none): A pointer to a #guint32 to be filled in, or %NULL.
* @shift: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
* @precision: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
*
* Obtains values that are needed to calculate green pixel values in TrueColor
* and DirectColor. The "mask" is the significant bits within the pixel.
* The "shift" is the number of bits left we must shift a primary for it
* to be in position (according to the "mask"). Finally, "precision" refers
* to how much precision the pixel value contains for a particular primary.
*
* Since: 2.22
*/
void
gdk_visual_get_green_pixel_details (GdkVisual *visual,
guint32 *mask,
gint *shift,
gint *precision)
{
g_return_if_fail (GDK_IS_VISUAL (visual));
if (mask)
*mask = visual->green_mask;
if (shift)
*shift = visual->green_shift;
if (precision)
*precision = visual->green_prec;
}
/**
* gdk_visual_get_blue_pixel_details:
* @visual: a #GdkVisual
* @mask: (out) (allow-none): A pointer to a #guint32 to be filled in, or %NULL.
* @shift: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
* @precision: (out) (allow-none): A pointer to a #gint to be filled in, or %NULL.
*
* Obtains values that are needed to calculate blue pixel values in TrueColor
* and DirectColor. The "mask" is the significant bits within the pixel.
* The "shift" is the number of bits left we must shift a primary for it
* to be in position (according to the "mask"). Finally, "precision" refers
* to how much precision the pixel value contains for a particular primary.
*
* Since: 2.22
*/
void
gdk_visual_get_blue_pixel_details (GdkVisual *visual,
guint32 *mask,
gint *shift,
gint *precision)
{
g_return_if_fail (GDK_IS_VISUAL (visual));
if (mask)
*mask = visual->blue_mask;
if (shift)
*shift = visual->blue_shift;
if (precision)
*precision = visual->blue_prec;
}
#define __GDK_VISUAL_C__
#include "gdkaliasdef.c"
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