public PdfPage(IContainer container, IPdfRasterizer pdfRendering, PdfFile source, int pageIndex, float widthPt, float heightPt)
{
_container = container;
_pdfRendering = pdfRendering;
_source = source;
_pageIndex = pageIndex;
PageDimensions = new Dimensions(widthPt, heightPt);
}
public Dimensions ScaleKeepRatio(Dimensions maxDimensionses)
{
var ratioX = maxDimensionses.Width / Width;
var ratioY = maxDimensionses.Height / Height;
var ratio = Math.Min(ratioX, ratioY);
var newWidth = Width * ratio;
var newHeight = Height * ratio;
return new Dimensions(newWidth, newHeight);
}
public RelativeSelection(
Dimensions pageDimensions,
double relativeOffsetX,
double relativeOffsetY,
double relativeWidth,
double relativeHeight)
: this(pageDimensions,
relativeOffsetX,
relativeOffsetY,
relativeWidth,
relativeHeight,
0)
{
}
public RelativeSelection(
Dimensions pageDimensions,
double relativeOffsetX,
double relativeOffsetY,
double relativeWidth,
double relativeHeight,
int rotation)
{
_pageDimensions = pageDimensions;
RelativeOffsetX = relativeOffsetX;
RelativeOffsetY = relativeOffsetY;
RelativeWidth = relativeWidth;
RelativeHeight = relativeHeight;
Rotation = new Rotatation(rotation);
}
private GhostscriptSettings CreateSetting(Dimensions dimensions, int dpi)
{
var result = new GhostscriptSettings();
result.Device = GhostscriptDevices.png16m;
result.Resolution = new System.Drawing.Size(dpi, dpi);
result.Page = new GhostscriptPages
{
AllPages = false,
Start = _pageIndex,
End = _pageIndex
};
result.Size = new GhostscriptPageSize
{
Native = GhostscriptPageSizes.UNDEFINED,
Manual = dimensions.ToSize()
};
return result;
}
private async Task<TemporaryBitmapFile> CreateRasterFile(Dimensions scaledSize, int dpi)
{
var tempFile = new TemporaryBitmapFile("png");
await _pdfRendering.GenerateOutput(_source.File, tempFile.FileName, CreateSetting(scaledSize, dpi));
return tempFile;
}
public double ScaleRatioForDimension(Dimensions maxDimension)
{
var ratioX = maxDimension.Width / (_pageDimensions.Width * RelativeWidth);
var ratioY = maxDimension.Height / (_pageDimensions.Height * RelativeHeight);
return Math.Min(ratioX, ratioY);
}