以下是我使用的代码,用于获取现有图片、来自输入表单的文本,然后将来自输入表单的文本放置在现有图片上,并将其保存为新图片:
using (FileStream output = new FileStream(match_outputFile, FileMode.Create))
{
BitmapImage bitmap = new BitmapImage(new Uri(match_sourceFile, UriKind.Relative));
DrawingVisual visual = new DrawingVisual();
using (DrawingContext image = visual.RenderOpen())
{
image.DrawImage(bitmap, new Rect(0, 0, bitmap.PixelWidth, bitmap.PixelHeight));
buildText(image, "text1", this.text1.Text);
buildText(image, "text2", this.text2.Text);
buildText(image, "text3", this.text3.Text);
}
RenderTargetBitmap target = new RenderTargetBitmap(bitmap.PixelWidth, bitmap.PixelHeight, bitmap.DpiX, bitmap.DpiY, PixelFormats.Default);
target.Render(visual);
BitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(target));
encoder.Save(output);
}
正如您所看到的,它调用以下函数来绘制文本:
private void buildText(DrawingContext image, string settings, string input)
{
string[] setting = (Properties.Settings.Default[settings].ToString()).Split(',');
FormattedText text = new FormattedText(
input,
System.Globalization.CultureInfo.InvariantCulture,
FlowDirection.LeftToRight,
new Typeface(new FontFamily(setting[0]), FontStyles.Normal, FontWeights.Bold, FontStretches.Normal),
Convert.ToDouble(setting[5]),
(Brush) new BrushConverter().ConvertFromString(setting[4])
);
text.MaxTextWidth = Convert.ToDouble(setting[8]);
text.MaxTextHeight = Convert.ToDouble(setting[9]);
Point position = new Point(Convert.ToDouble(setting[7]), Convert.ToDouble(setting[6]));
switch (setting[2])
{
case "center": position.X += (Convert.ToDouble(setting[8]) - text.Width) / 2; break;
case "right": position.X += Convert.ToDouble(setting[8]) - text.Width; break;
}
switch (setting[3])
{
case "middle": position.Y += (Convert.ToDouble(setting[9]) - text.Height) / 2; break;
case "bottom": position.Y += Convert.ToDouble(setting[9]) - text.Height; break;
}
image.DrawText(text, position);
}
现在我需要的很简单...我需要将text2(且仅为text2)以中心位置为基准旋转一定角度后进行绘制。中心位置很简单,它应该是:
centerX = (setting[8] - setting[7]) / 2;
centerY = (setting[9] - setting[6]) / 2;
如果我想在中心位置以-30度的角度绘制此文本,怎么办?请记住,我只想旋转文本2,不是其他文本,也不是原始图像源。