private bool ImageOutputIsOk(int outputBufferSize, TurboJpegBuffer outputBuffer, int width, int height, int pitch, int pixelSize)
{
var results = new byte[outputBufferSize];
Marshal.Copy((IntPtr)outputBuffer, results, 0, outputBufferSize);
var image = new Bitmap(width, height, SdiPixelFormat.Format32bppArgb);
for (var y = 0; y < height; ++y)
{
for (var x = 0; x < width; ++x)
{
var baseOffset = y * pitch + x * pixelSize;
var colour = Color.FromArgb(results[baseOffset + TurboJpegInterop.RedOffset[TjPixelFormat.Rgba]],
results[baseOffset + TurboJpegInterop.GreenOffset[TjPixelFormat.Rgba]],
results[baseOffset + TurboJpegInterop.BlueOffset[TjPixelFormat.Rgba]]);
image.SetPixel(x, y, colour);
}
}
bool isOk;
using (var form = new Form
{
Text = String.Format("Width: {0}, Height: {1}", image.Width, image.Height),
ClientSize = new Size(Math.Max(image.Width, 64), Math.Max(image.Height, 64)),
FormBorderStyle = FormBorderStyle.FixedToolWindow
})
{
using (
var pictureBox = new PictureBox
{
Image = image,
Parent = form,
Dock = DockStyle.Fill,
SizeMode = PictureBoxSizeMode.Zoom
})
{
form.Show();
isOk =
MessageBox.Show("Does the image look reasonable?",
"Eyeballing…",
MessageBoxButtons.YesNo,
MessageBoxIcon.Question) == DialogResult.Yes;
}
form.Close();
}
return(isOk);
}
public void AllocAndSaveInBuffer()
{
const int bufsize = 1024;
var deadbeef = new byte[] { 0xde, 0xad, 0xbe, 0xef };
var pointerToMemory = NativeMethods.alloc(bufsize);
using (var buffer = new TurboJpegBuffer(pointerToMemory, bufsize))
{
Assert.IsTrue(buffer.BufferSize == bufsize);
pointerToMemory.Initialise(bufsize);
var bufferData = buffer.ToArray();
for (var i = 0; i < bufsize; ++i)
{
Assert.IsTrue(bufferData[i] == deadbeef[i % 4]);
}
}
}
public void AllocAndSaveInBuffer()
{
const int bufsize = 1024;
var deadbeef = new byte[] { 0xde, 0xad, 0xbe, 0xef };
var pointerToMemory = NativeMethods.alloc(bufsize);
using (var buffer = new TurboJpegBuffer(pointerToMemory, bufsize))
{
Assert.IsTrue(buffer.BufferSize == bufsize);
pointerToMemory.Initialise(bufsize);
var bufferData = buffer.ToArray();
for (var i = 0; i < bufsize; ++i)
{
Assert.IsTrue(bufferData[i] == deadbeef[i % 4]);
}
}
}
public void DecompressAndScaleImageByUnsupportedScaleFactor()
{
const int width = 509; // prime
const int height = 509;
var pixelSize = TurboJpegInterop.PixelSize[TjPixelFormat.Rgba];
var pitch = width * pixelSize;
var outputBufferSize = pitch * height;
var outputBuffer = new TurboJpegBuffer(outputBufferSize);
outputBuffer.Buffer.Initialise(outputBufferSize);
var success = NativeMethods.decompress((IntPtr)this.handle,
imageData,
imageData.Length,
(IntPtr)outputBuffer,
width,
pitch,
height,
TjPixelFormat.Rgba,
TurboJpegFlags.None);
Assert.IsTrue(success == 0);
Assert.IsFalse(this.ImageOutputIsOk(outputBufferSize, outputBuffer, width, height, pitch, pixelSize));
}
private bool ImageOutputIsOk(int outputBufferSize, TurboJpegBuffer outputBuffer, int width, int height, int pitch, int pixelSize)
{
var results = new byte[outputBufferSize];
Marshal.Copy((IntPtr)outputBuffer, results, 0, outputBufferSize);
var image = new Bitmap(width, height, SdiPixelFormat.Format32bppArgb);
for (var y = 0; y < height; ++y)
{
for (var x = 0; x < width; ++x)
{
var baseOffset = y * pitch + x * pixelSize;
var colour = Color.FromArgb(results[baseOffset + TurboJpegInterop.RedOffset[TjPixelFormat.Rgba]],
results[baseOffset + TurboJpegInterop.GreenOffset[TjPixelFormat.Rgba]],
results[baseOffset + TurboJpegInterop.BlueOffset[TjPixelFormat.Rgba]]);
image.SetPixel(x, y, colour);
}
}
bool isOk;
using(var form = new Form
{
Text = String.Format("Width: {0}, Height: {1}", image.Width, image.Height),
ClientSize = new Size(Math.Max(image.Width, 64), Math.Max(image.Height, 64)),
FormBorderStyle = FormBorderStyle.FixedToolWindow
})
{
using(
var pictureBox = new PictureBox
{
Image = image,
Parent = form,
Dock = DockStyle.Fill,
SizeMode = PictureBoxSizeMode.Zoom
})
{
form.Show();
isOk =
MessageBox.Show("Does the image look reasonable?",
"Eyeballing…",
MessageBoxButtons.YesNo,
MessageBoxIcon.Question) == DialogResult.Yes;
}
form.Close();
}
return isOk;
}
public void DecompressAndScaleImageByUnsupportedScaleFactor()
{
const int width = 509; // prime
const int height = 509;
var pixelSize = TurboJpegInterop.PixelSize[TjPixelFormat.Rgba];
var pitch = width * pixelSize;
var outputBufferSize = pitch * height;
var outputBuffer = new TurboJpegBuffer(outputBufferSize);
outputBuffer.Buffer.Initialise(outputBufferSize);
var success = NativeMethods.decompress((IntPtr)this.handle,
imageData,
imageData.Length,
(IntPtr)outputBuffer,
width,
pitch,
height,
TjPixelFormat.Rgba,
TurboJpegFlags.None);
Assert.IsTrue(success == 0);
Assert.IsFalse(this.ImageOutputIsOk(outputBufferSize, outputBuffer, width, height, pitch, pixelSize));
}
