private static ArgbColor[] Get32BppArgbPixels(this Bitmap bitmap)
{
int width;
int height;
BitmapData bitmapData;
ArgbColor[] results;
width = bitmap.Width;
height = bitmap.Height;
results = new ArgbColor[width * height];
bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly,
PixelFormat.Format32bppArgb);
unsafe
{
ArgbColor* pixel;
pixel = (ArgbColor*)bitmapData.Scan0;
for (int row = 0; row < height; row++)
{
for (int col = 0; col < width; col++)
{
results[row * width + col] = *pixel;
pixel++;
}
}
}
bitmap.UnlockBits(bitmapData);
return results;
}
private void Load(string fileName)
{
const int recordLength = 4 * 2; // four values per pixel, two bytes per value
int width;
int height;
ArgbColor[] pixels;
using (Stream stream = File.OpenRead(fileName))
{
byte[] header;
int length;
int rowLength;
byte[] buffer;
header = new byte[8];
stream.Read(header, 0, header.Length);
stream.Read(header, 0, header.Length);
width = WordHelpers.MakeDWordBigEndian(header[0], header[1], header[2], header[3]);
height = WordHelpers.MakeDWordBigEndian(header[4], header[5], header[6], header[7]);
length = width * height;
pixels = new ArgbColor[length];
rowLength = width * recordLength;
buffer = new byte[rowLength];
for (int row = 0; row < height; row++)
{
stream.Read(buffer, 0, rowLength);
for (int col = 0; col < width; col++)
{
int r;
int g;
int b;
int a;
int index;
index = col * recordLength;
r = WordHelpers.MakeWordBigEndian(buffer[index], buffer[index + 1]) / 256;
g = WordHelpers.MakeWordBigEndian(buffer[index + 2], buffer[index + 3]) / 256;
b = WordHelpers.MakeWordBigEndian(buffer[index + 4], buffer[index + 5]) / 256;
a = WordHelpers.MakeWordBigEndian(buffer[index + 6], buffer[index + 7]) / 256;
pixels[row * width + col] = new ArgbColor(a, r, g, b);
}
}
}
this.Width = width;
this.Height = height;
this.PixelData = pixels;
}
public Bitmap ToBitmap()
{
Bitmap bitmap;
BitmapData bitmapData;
int width;
int height;
ushort[] data;
width = this.Width;
height = this.Height;
data = this.GetData();
bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
unsafe
{
ArgbColor* pixelPtr;
int index;
pixelPtr = (ArgbColor*)bitmapData.Scan0;
index = 0;
for (int i = 0; i < width * height; i++)
{
*pixelPtr = new ArgbColor(data[index + 3] / 256, data[index] / 256, data[index + 1] / 256,
data[index + 2] / 256);
pixelPtr++;
index += 4;
}
}
bitmap.UnlockBits(bitmapData);
return bitmap;
}
public static void Test1_read_a_byte_at_a_time_original()
{
int count;
string sampleFileName;
List<ArgbColor[]> results;
count = _iterations;
sampleFileName = SampleFileName;
results = new List<ArgbColor[]>();
for (int i = 0; i < count; i++)
{
using (Stream stream = File.OpenRead(sampleFileName))
{
byte[] header;
int width;
int height;
int length;
ArgbColor[] pixels;
header = new byte[8];
stream.Read(header, 0, header.Length);
width = stream.ReadUInt32BigEndian();
height = stream.ReadUInt32BigEndian();
length = width * height;
pixels = new ArgbColor[length];
for (int j = 0; j < length; j++)
{
int r;
int g;
int b;
int a;
r = stream.ReadUInt16BigEndian() / 256;
g = stream.ReadUInt16BigEndian() / 256;
b = stream.ReadUInt16BigEndian() / 256;
a = stream.ReadUInt16BigEndian() / 256;
pixels[j] = new ArgbColor(a, r, g, b);
}
results.Add(pixels);
}
}
_testResults = results;
}
public static void Test4_read_pixel_data_by_row()
{
const int recordLength = 4 * 2; // four values per pixel, two bytes per value
int count;
string sampleFileName;
List<ArgbColor[]> results;
count = _iterations;
sampleFileName = SampleFileName;
results = new List<ArgbColor[]>();
for (int i = 0; i < count; i++)
{
using (Stream stream = File.OpenRead(sampleFileName))
{
byte[] header;
int width;
int height;
int length;
int rowLength;
ArgbColor[] pixels;
byte[] buffer;
header = new byte[8];
stream.Read(header, 0, header.Length);
stream.Read(header, 0, header.Length);
width = WordHelpers.MakeDWordBigEndian(header[0], header[1], header[2], header[3]);
height = WordHelpers.MakeDWordBigEndian(header[4], header[5], header[6], header[7]);
length = width * height;
pixels = new ArgbColor[length];
rowLength = width * recordLength;
buffer = new byte[rowLength];
for (int row = 0; row < height; row++)
{
stream.Read(buffer, 0, rowLength);
for (int col = 0; col < width; col++)
{
int r;
int g;
int b;
int a;
int index;
index = col * recordLength;
r = WordHelpers.MakeWordBigEndian(buffer[index], buffer[index + 1]) / 256;
g = WordHelpers.MakeWordBigEndian(buffer[index + 2], buffer[index + 3]) / 256;
b = WordHelpers.MakeWordBigEndian(buffer[index + 4], buffer[index + 5]) / 256;
a = WordHelpers.MakeWordBigEndian(buffer[index + 6], buffer[index + 7]) / 256;
pixels[row * width + col] = new ArgbColor(a, r, g, b);
}
}
results.Add(pixels);
}
}
_testResults = results;
}
public static void Test3_read_one_pixel_at_a_time()
{
const int recordLength = 4 * 2; // four values per pixel, two bytes per value
int count;
string sampleFileName;
List<ArgbColor[]> results;
byte[] buffer;
count = _iterations;
sampleFileName = SampleFileName;
results = new List<ArgbColor[]>();
buffer = new byte[recordLength];
for (int i = 0; i < count; i++)
{
using (Stream stream = File.OpenRead(sampleFileName))
{
byte[] header;
int width;
int height;
int length;
ArgbColor[] pixels;
header = new byte[8];
stream.Read(header, 0, header.Length);
stream.Read(header, 0, header.Length);
width = WordHelpers.MakeDWordBigEndian(header[0], header[1], header[2], header[3]);
height = WordHelpers.MakeDWordBigEndian(header[4], header[5], header[6], header[7]);
length = width * height;
pixels = new ArgbColor[length];
for (int j = 0; j < length; j++)
{
int r;
int g;
int b;
int a;
stream.Read(buffer, 0, recordLength);
r = WordHelpers.MakeWordBigEndian(buffer[0], buffer[1]) / 256;
g = WordHelpers.MakeWordBigEndian(buffer[2], buffer[3]) / 256;
b = WordHelpers.MakeWordBigEndian(buffer[4], buffer[5]) / 256;
a = WordHelpers.MakeWordBigEndian(buffer[6], buffer[7]) / 256;
pixels[j] = new ArgbColor(a, r, g, b);
}
results.Add(pixels);
}
}
_testResults = results;
}
