static async Task CallPngquant(string tempPng, string png)
{
ProcessStartInfo pngquant = new()
{
FileName = "pngquant.exe",
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
pngquant.AppendArguments("--force", "--verbose", "--ordered", "--speed=1", "--skip-if-larger", "--quality=50-70", tempPng, "--output", png);
EnvironmentHelpers.AppendToPath(pngquantPath);
using var process = Process.Start(pngquant) !;
await process.WaitForExitAsync();
//skip-if-larger can result in 98 "not saved"
if (process.ExitCode == 98)
{
File.Move(tempPng, png);
}
else
{
File.Delete(tempPng);
}
}
static async Task Run(string fileName, params string[] arguments)
{
ProcessStartInfo startInfo = new(fileName)
{
CreateNoWindow = true,
RedirectStandardOutput = true,
RedirectStandardError = true,
UseShellExecute = false
};
startInfo.AppendArguments(arguments);
EnvironmentHelpers.AppendToPath(ogr2ogrPath);
using var process = Process.Start(startInfo) !;
await process.WaitForExitAsync();
if (process.ExitCode != 0)
{
var readToEnd = await process.StandardError.ReadToEndAsync();
if (readToEnd.Contains("Error"))
{
throw new($"Failed to run: {arguments}. Output: {readToEnd}");
}
}
}
}
static async Task CallGhostScript(string pdf, string tempPng)
{
ProcessStartInfo gswin64 = new()
{
FileName = "gswin64c.exe",
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
gswin64.AppendArguments("-dNoCancel", "-sDEVICE=png16m", "-dBATCH", "-r300", "-dNOPAUSE", "-dDownScaleFactor=2", "-q", $"-sOutputFile={tempPng}", pdf);
EnvironmentHelpers.AppendToPath(ghostScriptPath);
using var process = Process.Start(gswin64) !;
await process.WaitForExitAsync();
}
}