如何在c#中创建16位灰度PNG
本文关键字:16位 灰度 PNG 创建 | 更新日期: 2023-09-27 18:11:29
我正在尝试为城市:天际线生成一个高度图,它将它们导入为16位灰度png。
我用PixelFormat.Format16bppGrayScale
创建了一个Bitmap
,但试图通过Bitmap.Save
保存它,传入I mageFormat.Png
,导致ExternalException
与
"附加信息:GDI+中出现一般性错误。"
此外,从这些16位灰度PNG文件中的一个加载Bitmap
,将文件打开为Format32bppArgb
,我假设无声地删除一半数据。
如何在。net/c#中使用16位灰度PNG图像?
更新: magic。. NET-Q16-AnyCPU已迁移到https://github.com/dlemstra/Magick.NET.
Magick的NuGet包。NET-Q16-AnyCPU https://magick.codeplex.com/工作完美。下面是我的代码:
namespace heightmap_generator {
internal class Program {
private static int GRID_SIZE = 1081;
private static void Main(string[] args) {
using (MagickImage image = new MagickImage(@"C:'Users'Brent'AppData'Local'Colossal Order'Cities_Skylines'Addons'MapEditor'Heightmaps'benchmark.png")) {
image.Draw(
new DrawableFillColor(new MagickColor(ushort.MaxValue / 2, ushort.MaxValue / 2, ushort.MaxValue / 2)),
new DrawableRectangle(0, 0, GRID_SIZE, GRID_SIZE)
);
var drawables = new List<IDrawable>();
for (var y = 0; y < GRID_SIZE/50; ++y) {
float t = y / (GRID_SIZE / 50.0f);
t = t*t*(3 - 2*t); //cubic hermite spline h01
ushort v = (ushort)(ushort.MaxValue * (5 + (t-1)*0.3) / 10);
if (y == GRID_SIZE/50 - 1) {
v = (ushort) (ushort.MaxValue*0.501);
}
drawables.Add(new DrawableFillColor(new MagickColor(v, v, v)));
for (var x = 0; x < GRID_SIZE; ++x) {
if (x == GRID_SIZE/2) {
var v2 = (ushort) (v + ushort.MaxValue/1024);
drawables.Add(new DrawableFillColor(new MagickColor(v2, v2, v2)));
drawables.Add(new DrawableColor(x, GRID_SIZE/2 - y, PaintMethod.Point));
drawables.Add(new DrawableColor(x, GRID_SIZE/2 + y, PaintMethod.Point));
drawables.Add(new DrawableFillColor(new MagickColor(v, v, v)));
} else {
drawables.Add(new DrawableColor(x, GRID_SIZE/2 - y, PaintMethod.Point));
drawables.Add(new DrawableColor(x, GRID_SIZE/2 + y, PaintMethod.Point));
}
}
}
image.Draw(drawables);
image.Write(new FileStream(@"C:'Users'Brent'AppData'Local'Colossal Order'Cities_Skylines'Addons'MapEditor'Heightmaps'benchmark3.png", FileMode.Create));
}
}
}
}