PngImage
PngImage constructor (1 of 8)
Initializes a new instance of the PngImage
class.
public PngImage(int width, int height)
Parameter | Type | Description |
---|---|---|
width | Int32 | The width. |
height | Int32 | The height. |
Examples
This example shows how to create a PNG image of the specified size, fill it with a solid color and save it to a file.
[C#]
string dir = "c:\\temp\\";
// Create a PNG image of 100x100 px.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(100, 100))
{
// Do some image processing, e.g. fill the entire image in red.
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
Aspose.Imaging.Brushes.SolidBrush brush = new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.Red);
graphics.FillRectangle(brush, pngImage.Bounds);
// Save to a file.
pngImage.Save(dir + "output.png");
}
See Also
- class PngImage
- namespace Aspose.Imaging.FileFormats.Png
- assembly Aspose.Imaging
PngImage constructor (2 of 8)
Initializes a new instance of the PngImage
class.
public PngImage(string path)
Parameter | Type | Description |
---|---|---|
path | String | The path to load an image. |
Examples
This example shows how to load a PNG image from a file.
[C#]
string dir = "c:\\temp\\";
// Load a PNG image from a file.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(dir + "sample.png"))
{
// Transform the image to grayscale representation
pngImage.Grayscale();
// Save to a file.
pngImage.Save(dir + "sample.grayscale.png");
}
See Also
- class PngImage
- namespace Aspose.Imaging.FileFormats.Png
- assembly Aspose.Imaging
PngImage constructor (3 of 8)
Initializes a new instance of the PngImage
class.
public PngImage(RasterImage rasterImage)
Parameter | Type | Description |
---|---|---|
rasterImage | RasterImage | The raster image. |
Examples
This example shows how to load PNG image from a BMP image.
[C#]
string dir = "c:\\temp\\";
// Load a TrueColor PNG image from a BMP image.
// First, create a temporal BMP image that will be a foundation for building a PNG image.
// You can also load BMP image from a file or use an image of any other raster format.
using (Aspose.Imaging.FileFormats.Bmp.BmpImage bmpImage = new Aspose.Imaging.FileFormats.Bmp.BmpImage(100, 100))
{
// Fill the entire BMP image in red.
Aspose.Imaging.Graphics gr = new Aspose.Imaging.Graphics(bmpImage);
Aspose.Imaging.Brushes.SolidBrush brush = new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.Red);
gr.FillRectangle(brush, bmpImage.Bounds);
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(bmpImage))
{
System.Console.WriteLine("The PNG color type: {0}", pngImage.GetOriginalOptions());
pngImage.Save(dir + "output.png");
}
}
See Also
- class RasterImage
- class PngImage
- namespace Aspose.Imaging.FileFormats.Png
- assembly Aspose.Imaging
PngImage constructor (4 of 8)
Initializes a new instance of the PngImage
class.
public PngImage(string path, PngColorType colorType)
Parameter | Type | Description |
---|---|---|
path | String | The path to load an image. |
colorType | PngColorType | The color type. |
Exceptions
exception | condition |
---|---|
ArgumentNullException |
Examples
This example shows how to load a PNG image from a file with the specified color type.
[C#]
string dir = "c:\\temp\\";
// Load a PNG image from a file.
// Note that the colorful image will be converted to grayscale automatically.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(dir + "sample.png", Aspose.Imaging.FileFormats.Png.PngColorType.Grayscale))
{
// Save to a file.
pngImage.Save(dir + "sample.grayscale.png");
}
See Also
- enum PngColorType
- class PngImage
- namespace Aspose.Imaging.FileFormats.Png
- assembly Aspose.Imaging
PngImage constructor (5 of 8)
Initializes a new instance of the PngImage
class.
public PngImage(RasterImage rasterImage, PngColorType colorType)
Parameter | Type | Description |
---|---|---|
rasterImage | RasterImage | The raster image. |
colorType | PngColorType | The color type. |
Examples
This example shows how to load PNG image from a BMP image with the specified color type.
[C#]
string dir = "c:\\temp\\";
// Load a grayscale PNG image from a colored BMP image.
// First, create a temporal BMP image that will be a foundation for building a PNG image.
// You can also load BMP image from a file or use an image of any other raster format.
using (Aspose.Imaging.FileFormats.Bmp.BmpImage bmpImage = new Aspose.Imaging.FileFormats.Bmp.BmpImage(100, 100))
{
// Fill the entire BMP image in red.
Aspose.Imaging.Graphics gr = new Aspose.Imaging.Graphics(bmpImage);
Aspose.Imaging.Brushes.SolidBrush brush = new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.Red);
gr.FillRectangle(brush, bmpImage.Bounds);
// The colors of the image pixels will be converted to their grayscale counterparts.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(bmpImage, Aspose.Imaging.FileFormats.Png.PngColorType.Grayscale))
{
pngImage.Save(dir + "output.grayscale.png");
}
}
See Also
- class RasterImage
- enum PngColorType
- class PngImage
- namespace Aspose.Imaging.FileFormats.Png
- assembly Aspose.Imaging
PngImage constructor (6 of 8)
Initializes a new instance of the PngImage
class.
public PngImage(Stream stream)
Parameter | Type | Description |
---|---|---|
stream | Stream | The stream to load an image. |
Examples
This example shows how to load a PNG image from a file or a file stream.
[C#]
string dir = "c:\\temp\\";
// Load a PNG image from a file stream.
using (System.IO.Stream stream = System.IO.File.OpenRead(dir + "sample.png"))
{
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(stream))
{
// Transform the image to grayscale representation
pngImage.Grayscale();
// Save to a file.
pngImage.Save(dir + "sample.grayscale.png");
}
}
See Also
- class PngImage
- namespace Aspose.Imaging.FileFormats.Png
- assembly Aspose.Imaging
PngImage constructor (7 of 8)
Initializes a new instance of the PngImage
class.
public PngImage(int width, int height, PngColorType colorType)
Parameter | Type | Description |
---|---|---|
width | Int32 | The width. |
height | Int32 | The height. |
colorType | PngColorType | The color type. |
Examples
This example shows how to create a PNG image of the specified size with the specified color type, fill it with a solid color and save it to a file.
[C#]
string dir = "c:\\temp\\";
// Create a grayscale PNG image of 100x100 px.
// All colors will be automatically converted to the grayscale format.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(100, 100, Aspose.Imaging.FileFormats.Png.PngColorType.Grayscale))
{
// Do some image processing, e.g. fill the entire image in red.
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
Aspose.Imaging.Brushes.SolidBrush brush = new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.Red);
graphics.FillRectangle(brush, pngImage.Bounds);
// Save to a file.
pngImage.Save(dir + "output.grayscale.png");
}
See Also
- enum PngColorType
- class PngImage
- namespace Aspose.Imaging.FileFormats.Png
- assembly Aspose.Imaging
PngImage constructor (8 of 8)
Initializes a new instance of the PngImage
class.
public PngImage(PngOptions pngOptions, int width, int height)
Parameter | Type | Description |
---|---|---|
pngOptions | PngOptions | The png options. |
width | Int32 | The width. |
height | Int32 | The height. |
Examples
This example shows how to create a PNG image with the specified options, fill it with a linear gradient colors and save it to a file.
[C#]
string dir = "c:\\temp\\";
Aspose.Imaging.ImageOptions.PngOptions createOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// The number of bits per color channel
createOptions.BitDepth = 8;
// Each pixel is a (red, green, blue) triple followed by the alpha component.
createOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// The maximum level of compression.
createOptions.CompressionLevel = 9;
// Usage of filters allows to compress continuous tonal images more effectively.
createOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Sub;
// Use progressive loading
createOptions.Progressive = true;
// Create a PNG image with custom parameters.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(createOptions, 100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with a semi-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
// Save to a file.
pngImage.Save(dir + "output.explicitoptions.png");
}
See Also
- class PngOptions
- class PngImage
- namespace Aspose.Imaging.FileFormats.Png
- assembly Aspose.Imaging