IsPixelFormatIndexed Method (GdPictureImaging)
In This Topic
Asks if the pixel format of a GdPicture image is indexed.
Syntax
'Declaration
Public Function IsPixelFormatIndexed( _
ByVal As Integer _
) As Boolean
public bool IsPixelFormatIndexed(
int
)
public function IsPixelFormatIndexed(
: Integer
): Boolean;
public function IsPixelFormatIndexed(
: int
) : boolean;
public: bool IsPixelFormatIndexed(
int
)
public:
bool IsPixelFormatIndexed(
int
)
Parameters
- ImageID
- GdPicture image identifier.
Return Value
True if the pixel format is indexed else False.
Example
Processing images with the indexed pixel format.
Storing the color palette into the array and showing information about entries count.
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
// Open an image file. An empty string allows the control to prompt for selecting a file.
int imageID = gdpictureImaging.CreateGdPictureImageFromFile("");
if (gdpictureImaging.IsPixelFormatIndexed(imageID))
{
System.Drawing.Color[] palette = null;
int entriesCount = 0;
gdpictureImaging.PaletteGet(imageID, ref palette, ref entriesCount);
Console.WriteLine("Image contains palete with {0} color entries.", entriesCount.ToString());
}
else Console.WriteLine("Image do not contain indexed colors!");
// Release used resources.
gdpictureImaging.ReleaseGdPictureImage(imageID);
}
Getting information about the specific palette entry of the selected image and showing the result on the screen.
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
// Open image file. Empty string allows the control to prompt for a selecting file.
int imageID = gdpictureImaging.CreateGdPictureImageFromFile("");
if (gdpictureImaging.IsPixelFormatIndexed(imageID))
{
int entriesCount = gdpictureImaging.PaletteGetColorsCount(imageID);
if (entriesCount>255)
{
System.Drawing.Color entryColor = gdpictureImaging.PaletteGetEntry(imageID,130);
Console.WriteLine("Color value of palette entry [130] is: {0}", entryColor.ToString());
}
else Console.WriteLine("Image do not contain palette with 256 colors!");
}
else Console.WriteLine("Image do not contain indexed colors!");
// Release used resources
gdpictureImaging.ReleaseGdPictureImage(imageID);
}
Example
Processing images with the indexed pixel format.
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
// Open an image file. An empty string allows the control to prompt for selecting a file.
int imageID = gdpictureImaging.CreateGdPictureImageFromFile("");
if (gdpictureImaging.IsPixelFormatIndexed(imageID))
{
System.Drawing.Color[] palette = null;
int entriesCount = 0;
gdpictureImaging.PaletteGet(imageID, ref palette, ref entriesCount);
Console.WriteLine("Image contains palete with {0} color entries.", entriesCount.ToString());
}
else Console.WriteLine("Image do not contain indexed colors!");
// Release used resources.
gdpictureImaging.ReleaseGdPictureImage(imageID);
}
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
// Open image file. Empty string allows the control to prompt for a selecting file.
int imageID = gdpictureImaging.CreateGdPictureImageFromFile("");
if (gdpictureImaging.IsPixelFormatIndexed(imageID))
{
int entriesCount = gdpictureImaging.PaletteGetColorsCount(imageID);
if (entriesCount>255)
{
System.Drawing.Color entryColor = gdpictureImaging.PaletteGetEntry(imageID,130);
Console.WriteLine("Color value of palette entry [130] is: {0}", entryColor.ToString());
}
else Console.WriteLine("Image do not contain palette with 256 colors!");
}
else Console.WriteLine("Image do not contain indexed colors!");
// Release used resources
gdpictureImaging.ReleaseGdPictureImage(imageID);
}
See Also
