public void RestoreCanvasScale(HCCanvas aCanvas, ScaleInfo aOldInfo)
{
POINT pt = new POINT();
SIZE size = new SIZE();
GDI.SetViewportOrgEx(aCanvas.Handle, aOldInfo.ViewportOrg.X, aOldInfo.ViewportOrg.Y, ref pt);
GDI.SetViewportExtEx(aCanvas.Handle, aOldInfo.ViewportExt.cx, aOldInfo.ViewportExt.cy, ref size);
GDI.SetWindowOrgEx(aCanvas.Handle, aOldInfo.WindowOrg.X, aOldInfo.WindowOrg.Y, ref pt);
GDI.SetWindowExtEx(aCanvas.Handle, aOldInfo.WindowExt.cx, aOldInfo.WindowExt.cy, ref size);
GDI.SetMapMode(aCanvas.Handle, aOldInfo.MapMode);
}
public ScaleInfo ScaleCanvas(HCCanvas aCanvas)
{
ScaleInfo Result = new ScaleInfo();
Result.MapMode = GDI.GetMapMode(aCanvas.Handle); // 返回映射方式，零则失败
GDI.SetMapMode(aCanvas.Handle, GDI.MM_ANISOTROPIC); // 逻辑单位转换成具有任意比例轴的任意单位，用SetWindowsEx和SetViewportExtEx函数指定单位、方向和需要的比例
GDI.SetWindowOrgEx(aCanvas.Handle, 0, 0, ref Result.WindowOrg); // 用指定的坐标设置设备环境的窗口原点
GDI.SetWindowExtEx(aCanvas.Handle, FWindowWidth, FWindowHeight, ref Result.WindowExt); // 为设备环境设置窗口的水平的和垂直的范围
GDI.SetViewportOrgEx(aCanvas.Handle, 0, 0, ref Result.ViewportOrg); // 哪个设备点映射到窗口原点(0,0)
// 用指定的值来设置指定设备环境坐标的X轴、Y轴范围
GDI.SetViewportExtEx(aCanvas.Handle, (int)Math.Round(FWindowWidth * FScaleX),
(int)Math.Round(FWindowHeight * FScaleY), ref Result.ViewportExt);
return(Result);
}
public void SaveToImage(string path, string prefix, string imageType, bool onePaper = true)
{
HCCanvas vBmpCanvas = new HCCanvas();
SectionPaintInfo vPaintInfo = new SectionPaintInfo();
try
{
vPaintInfo.ScaleX = 1;
vPaintInfo.ScaleY = 1;
vPaintInfo.Zoom = 1;
vPaintInfo.Print = true;
vPaintInfo.DPI = HCUnitConversion.PixelsPerInchX;
vPaintInfo.ViewModel = HCViewModel.hvmFilm;
int vWidth = 0, vHeight = 0;
if (onePaper)
{
for (int i = 0; i < FSections.Count; i++)
{
vHeight = vHeight + FSections[i].PaperHeightPix * FSections[i].PageCount;
if (vWidth < FSections[i].PaperWidthPix)
{
vWidth = FSections[i].PaperWidthPix;
}
}
vPaintInfo.WindowWidth = vWidth;
vPaintInfo.WindowHeight = vHeight;
using (Bitmap vBmp = new Bitmap(vWidth, vHeight))
{
vBmpCanvas.Graphics = Graphics.FromImage(vBmp);
int vSectionIndex = 0, vSectionPageIndex = 0, vTop = 0;
for (int i = 0; i < this.PageCount; i++)
{
vSectionIndex = GetSectionPageIndexByPageIndex(i, ref vSectionPageIndex);
//vWidth = FSections[vSectionIndex].PaperWidthPix;
vHeight = FSections[vSectionIndex].PaperHeightPix;
vBmpCanvas.Brush.Color = Color.White;
vBmpCanvas.FillRect(new RECT(0, vTop, vWidth, vTop + vHeight));
ScaleInfo vScaleInfo = vPaintInfo.ScaleCanvas(vBmpCanvas);
try
{
FSections[vSectionIndex].PaintPaper(vSectionPageIndex, 0, vTop, vBmpCanvas, vPaintInfo);
vTop = vTop + vHeight;
}
finally
{
vPaintInfo.RestoreCanvasScale(vBmpCanvas, vScaleInfo);
}
}
vBmpCanvas.Dispose();
if (imageType == "BMP")
{
vBmp.Save(path + prefix + ".bmp", System.Drawing.Imaging.ImageFormat.Bmp);
}
else
if (imageType == "JPG")
{
vBmp.Save(path + prefix + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
vBmp.Save(path + prefix + ".png", System.Drawing.Imaging.ImageFormat.Png);
}
}
}
else
{
int vSectionIndex = 0, vSectionPageIndex = 0;
for (int i = 0; i < this.PageCount; i++)
{
vSectionIndex = GetSectionPageIndexByPageIndex(i, ref vSectionPageIndex);
using (Bitmap vBmp = new Bitmap(FSections[vSectionIndex].PaperWidthPix, FSections[vSectionIndex].PaperHeightPix))
{
vBmpCanvas.Graphics = Graphics.FromImage(vBmp);
vBmpCanvas.Brush.Color = Color.White;
vBmpCanvas.FillRect(new RECT(0, 0, vBmp.Width, vBmp.Height));
vPaintInfo.WindowWidth = vBmp.Width;
vPaintInfo.WindowHeight = vBmp.Height;
ScaleInfo vScaleInfo = vPaintInfo.ScaleCanvas(vBmpCanvas);
try
{
vBmpCanvas.Brush.Color = Color.White;
vBmpCanvas.FillRect(new RECT(0, 0, vBmp.Width, vBmp.Height));
FSections[vSectionIndex].PaintPaper(vSectionPageIndex, 0, 0, vBmpCanvas, vPaintInfo);
}
finally
{
vPaintInfo.RestoreCanvasScale(vBmpCanvas, vScaleInfo);
}
vBmpCanvas.Dispose();
if (imageType == "BMP")
{
vBmp.Save(path + prefix + (i + 1).ToString() + ".bmp", System.Drawing.Imaging.ImageFormat.Bmp);
}
else
if (imageType == "JPG")
{
vBmp.Save(path + prefix + (i + 1).ToString() + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
}
else
{
vBmp.Save(path + prefix + (i + 1).ToString() + ".png", System.Drawing.Imaging.ImageFormat.Png);
}
}
}
}
}
finally
{
vPaintInfo.Dispose();
}
}
