public void SimpleCheckerboardWithArbitraryTextData()
{
var builder = PngBuilder.Create(2, 2, false);
builder.SetPixel(new Pixel(255, 0, 12), 0, 0);
builder.SetPixel(255, 0, 12, 1, 1);
builder.StoreText("Title", "Checkerboard");
builder.StoreText("another-data", "bərd that's good and other\r\nstuff");
using (var memory = new MemoryStream())
{
builder.Save(memory);
memory.Seek(0, SeekOrigin.Begin);
var visitor = new MyChunkVisitor();
var read = Png.Open(memory, visitor);
Assert.NotNull(read);
var textChunks = visitor.Visited.Where(x => x.header.Name == "iTXt").ToList();
Assert.Equal(2, textChunks.Count);
}
}
public void SimpleCheckerboard()
{
var builder = PngBuilder.Create(2, 2, false);
var red = new Pixel(255, 0, 12);
var black = new Pixel(0, 0, 0, 255, false);
builder.SetPixel(new Pixel(255, 0, 12), 0, 0);
builder.SetPixel(255, 0, 12, 1, 1);
using (var memory = new MemoryStream())
{
builder.Save(memory);
memory.Seek(0, SeekOrigin.Begin);
var read = Png.Open(memory);
var left = read.GetPixel(0, 0);
Assert.Equal(red, left);
var right = read.GetPixel(1, 0);
Assert.Equal(black, right);
var bottomLeft = read.GetPixel(0, 1);
Assert.Equal(black, bottomLeft);
var bottomRight = read.GetPixel(1, 1);
Assert.Equal(red, bottomRight);
}
}
public override void Init(MemoryStream imageStream)
{
this.imageStream = imageStream;
readOnlyInstance = Png.Open(this.imageStream);
writableInstance = PngBuilder.Create(readOnlyInstance.Width, readOnlyInstance.Height, readOnlyInstance.HasAlphaChannel);
for (var y = 0; y < readOnlyInstance.Height; y++)
{
for (var x = 0; x < readOnlyInstance.Width; x++)
{
writableInstance.SetPixel(readOnlyInstance.GetPixel(x, y), x, y);
}
}
}
public void CanCompressImageWithAlphaChannel()
{
var file = GetImageFile("pdfpig.png");
var png = Png.Open(file);
var builder = PngBuilder.Create(png.Width, png.Height, png.HasAlphaChannel);
CopyPngToBuilder(png, builder);
var sizeRaw = builder.Save().Length;
var compressed = builder.Save(SaveCompressed);
File.WriteAllBytes(@"C:\temp\mycompressed.png", compressed);
Assert.True(compressed.Length < sizeRaw, $"Compressed size {compressed.Length} bytes was not smaller than raw size {sizeRaw}.");
}
public Stream ToPng()
{
var stream = new MemoryStream();
var builder = PngBuilder.Create(Width, Height, false);
for (int y = 0; y < Height; ++y)
{
for (int x = 0; x < Width; ++x)
{
var p = (Width * y + x) * 4;
builder.SetPixel(new BigGustave.Pixel(Bytes[p], Bytes[p + 1], Bytes[p + 2], Bytes[p + 3], false), x, y);
}
}
builder.Save(stream);
stream.Seek(0, SeekOrigin.Begin);
return(stream);
}
public void BiggerImage()
{
var builder = PngBuilder.Create(10, 10, false);
var green = new Pixel(0, 255, 25, 255, false);
var color1 = new Pixel(60, 201, 32, 255, false);
var color2 = new Pixel(100, 5, 250, 255, false);
builder.SetPixel(green, 1, 1).SetPixel(green, 2, 1).SetPixel(green, 3, 1).SetPixel(green, 4, 1).SetPixel(green, 5, 1);
builder.SetPixel(color1, 5, 7).SetPixel(color1, 5, 8)
.SetPixel(color1, 6, 7).SetPixel(color1, 6, 8)
.SetPixel(color1, 7, 7).SetPixel(color1, 7, 8);
builder.SetPixel(color2, 9, 9).SetPixel(color2, 8, 8);
using (var memoryStream = new MemoryStream())
{
builder.Save(memoryStream);
}
}
