Aspose::Words::ConvertUtil::PixelToPoint method

ConvertUtil::PixelToPoint(double) method

Converts pixels to points at 96 dpi.

static double Aspose::Words::ConvertUtil::PixelToPoint(double pixels)
ParameterTypeDescription
pixelsdoubleThe value to convert.

Examples

Shows how to specify page properties in pixels.

auto doc = MakeObject<Document>();
auto builder = MakeObject<DocumentBuilder>(doc);

// A section's "Page Setup" defines the size of the page margins in points.
// We can also use the "ConvertUtil" class to use a different measurement unit,
// such as pixels when defining boundaries.
SharedPtr<PageSetup> pageSetup = builder->get_PageSetup();
pageSetup->set_TopMargin(ConvertUtil::PixelToPoint(100));
pageSetup->set_BottomMargin(ConvertUtil::PixelToPoint(200));
pageSetup->set_LeftMargin(ConvertUtil::PixelToPoint(225));
pageSetup->set_RightMargin(ConvertUtil::PixelToPoint(125));

// A pixel is 0.75 points.
ASPOSE_ASSERT_EQ(0.75, ConvertUtil::PixelToPoint(1));
ASPOSE_ASSERT_EQ(1.0, ConvertUtil::PointToPixel(0.75));

// The default DPI value used is 96.
ASPOSE_ASSERT_EQ(0.75, ConvertUtil::PixelToPoint(1, 96));

// Add content to demonstrate the new margins.
builder->Writeln(
    String::Format(u"This Text is {0} points/{1} pixels from the left, ", pageSetup->get_LeftMargin(),
                   ConvertUtil::PointToPixel(pageSetup->get_LeftMargin())) +
    String::Format(u"{0} points/{1} pixels from the right, ", pageSetup->get_RightMargin(), ConvertUtil::PointToPixel(pageSetup->get_RightMargin())) +
    String::Format(u"{0} points/{1} pixels from the top, ", pageSetup->get_TopMargin(), ConvertUtil::PointToPixel(pageSetup->get_TopMargin())) +
    String::Format(u"and {0} points/{1} pixels from the bottom of the page.", pageSetup->get_BottomMargin(),
                   ConvertUtil::PointToPixel(pageSetup->get_BottomMargin())));

doc->Save(ArtifactsDir + u"UtilityClasses.PointsAndPixels.docx");

See Also

ConvertUtil::PixelToPoint(double, double) method

Converts pixels to points at the specified pixel resolution.

static double Aspose::Words::ConvertUtil::PixelToPoint(double pixels, double resolution)
ParameterTypeDescription
pixelsdoubleThe value to convert.
resolutiondoubleThe dpi (dots per inch) resolution.

Examples

Shows how to use convert points to pixels with default and custom resolution.

auto doc = MakeObject<Document>();
auto builder = MakeObject<DocumentBuilder>(doc);

// Define the size of the top margin of this section in pixels, according to a custom DPI.
const double myDpi = 192;

SharedPtr<PageSetup> pageSetup = builder->get_PageSetup();
pageSetup->set_TopMargin(ConvertUtil::PixelToPoint(100, myDpi));

ASSERT_NEAR(37.5, pageSetup->get_TopMargin(), 0.01);

// At the default DPI of 96, a pixel is 0.75 points.
ASPOSE_ASSERT_EQ(0.75, ConvertUtil::PixelToPoint(1));

builder->Writeln(
    String::Format(u"This Text is {0} points/{1} ", pageSetup->get_TopMargin(), ConvertUtil::PointToPixel(pageSetup->get_TopMargin(), myDpi)) +
    String::Format(u"pixels (at a DPI of {0}) from the top of the page.", myDpi));

// Set a new DPI and adjust the top margin value accordingly.
const double newDpi = 300;
pageSetup->set_TopMargin(ConvertUtil::PixelToNewDpi(pageSetup->get_TopMargin(), myDpi, newDpi));
ASSERT_NEAR(59.0, pageSetup->get_TopMargin(), 0.01);

builder->Writeln(String::Format(u"At a DPI of {0}, the text is now {1} points/{2} ", newDpi, pageSetup->get_TopMargin(),
                                ConvertUtil::PointToPixel(pageSetup->get_TopMargin(), myDpi)) +
                 u"pixels from the top of the page.");

doc->Save(ArtifactsDir + u"UtilityClasses.PointsAndPixelsDpi.docx");

See Also

Aspose::Words::ConvertUtil::PixelToNewDpi method Aspose::Words::ConvertUtil::PointToInch method