private ImageAttributes GetLogoAttributes(SvgLogo logo, Size viewBox)
{
var imgWidth = logo.GetIconSizePercent() / 100d * viewBox.Width;
var imgHeight = logo.GetIconSizePercent() / 100d * viewBox.Height;
var imgPosX = viewBox.Width / 2d - imgWidth / 2d;
var imgPosY = viewBox.Height / 2d - imgHeight / 2d;
return(new ImageAttributes()
{
Width = imgWidth,
Height = imgHeight,
X = imgPosX,
Y = imgPosY
});
}
public string GetGraphic(Size viewBox, string darkColorHex, string lightColorHex, bool drawQuietZones = true, SizingMode sizingMode = SizingMode.WidthHeightAttribute, SvgLogo logo = null)
{
int offset = drawQuietZones ? 0 : 4;
int drawableModulesCount = this.QrCodeData.ModuleMatrix.Count - (drawQuietZones ? 0 : offset * 2);
double pixelsPerModule = Math.Min(viewBox.Width, viewBox.Height) / (double)drawableModulesCount;
double qrSize = drawableModulesCount * pixelsPerModule;
string svgSizeAttributes = (sizingMode == SizingMode.WidthHeightAttribute) ? $@"width=""{viewBox.Width}"" height=""{viewBox.Height}""" : $@"viewBox=""0 0 {viewBox.Width} {viewBox.Height}""";
// Merge horizontal rectangles
int[,] matrix = new int[drawableModulesCount, drawableModulesCount];
for (int yi = 0; yi < drawableModulesCount; yi += 1)
{
BitArray bitArray = this.QrCodeData.ModuleMatrix[yi + offset];
int x0 = -1;
int xL = 0;
for (int xi = 0; xi < drawableModulesCount; xi += 1)
{
matrix[yi, xi] = 0;
if (bitArray[xi + offset])
{
if (x0 == -1)
{
x0 = xi;
}
xL += 1;
}
else
{
if (xL > 0)
{
matrix[yi, x0] = xL;
x0 = -1;
xL = 0;
}
}
}
if (xL > 0)
{
matrix[yi, x0] = xL;
}
}
StringBuilder svgFile = new StringBuilder($@"<svg version=""1.1"" baseProfile=""full"" shape-rendering=""crispEdges"" {svgSizeAttributes} xmlns=""http://www.w3.org/2000/svg"">");
svgFile.AppendLine($@"<rect x=""0"" y=""0"" width=""{CleanSvgVal(qrSize)}"" height=""{CleanSvgVal(qrSize)}"" fill=""{lightColorHex}"" />");
for (int yi = 0; yi < drawableModulesCount; yi += 1)
{
double y = yi * pixelsPerModule;
for (int xi = 0; xi < drawableModulesCount; xi += 1)
{
int xL = matrix[yi, xi];
if (xL > 0)
{
// Merge vertical rectangles
int yL = 1;
for (int y2 = yi + 1; y2 < drawableModulesCount; y2 += 1)
{
if (matrix[y2, xi] == xL)
{
matrix[y2, xi] = 0;
yL += 1;
}
else
{
break;
}
}
// Output SVG rectangles
double x = xi * pixelsPerModule;
svgFile.AppendLine($@"<rect x=""{CleanSvgVal(x)}"" y=""{CleanSvgVal(y)}"" width=""{CleanSvgVal(xL * pixelsPerModule)}"" height=""{CleanSvgVal(yL * pixelsPerModule)}"" fill=""{darkColorHex}"" />");
}
}
}
//Render logo, if set
if (logo != null)
{
svgFile.AppendLine($@"<svg width=""100%"" height=""100%"" version=""1.1"" xmlns = ""http://www.w3.org/2000/svg"">");
svgFile.AppendLine($@"<image x=""{50 - (logo.GetIconSizePercent() / 2)}%"" y=""{50 - (logo.GetIconSizePercent() / 2)}%"" width=""{logo.GetIconSizePercent()}%"" height=""{logo.GetIconSizePercent()}%"" href=""{logo.GetDataUri()}"" />");
svgFile.AppendLine(@"</svg>");
}
svgFile.Append(@"</svg>");
return(svgFile.ToString());
}