• Zoom on an image

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

• Drawing in WINDEV, WEBDEV and WINDEV Mobile
• Image drawing and processing functions
• dArc (Function)
• dChord (Function)
• dStartDrawing (Function)
• dBackground (Function)
• dSlice (Function)
• dPen (Function)
• RGB (Function)
• dCopyScreenImage (Function)
• dCopyWindowImage (Function)
• dCopy (Function)
• dDifferenceImage (Function)

dCopyImage (Function)

In french: dCopieImage

Warning
From version 28 (66), dCopyBlt is kept for backward compatibility. This function has been replaced with dCopyImage.

are replaced with:

• functions applicable to the Image type (dEncrustColor, dInvertColor, etc.),
• access to pixels.

See also

• Drawing in WINDEV, WEBDEV and WINDEV Mobile
• Image drawing and processing functions
• dArc (Function)
• dChord (Function)
• dStartDrawing (Function)
• dBackground (Function)
• dSlice (Function)
• dPen (Function)
• RGB (Function)
• dCopyScreenImage (Function)
• dCopyWindowImage (Function)
• dCopy (Function)
• dDifferenceImage (Function)

Copies an image:

• from an Image control to another Image control.
• in a variable of type Image.
  

Only the first syntax can be used with the Image type.

Example

See additional examples

// Copie simple du contenu du champ Image "IMG_ImageDessin"
// dans le champ Image "IMG_ImageCopie"
ResCopie = dCopyImage(IMG_ImageDessin, IMG_ImageCopie)

• True if the image was copied,
• False otherwise.

Note The function dCopyImage function can return False if the screen driver does not support this function. In this case, a message is displayed in the copied image. We recommend that you update your screen driver in order to get the proper behavior.

Name of the source Image control to be used.
To make a Hard Copyuse the constant screen copy constant: the entire screen content is copied.

The copyScreen constant is not available.

This parameter can correspond to:

• the name of an Image control,
• the name of a variable of type Image.

Name of the destination Image control the image will be copied to.

This parameter can correspond to:

• the name of an Image control,
• the name of a variable of type Image.

Copy mode to be used.

copyBlackness	Fills the destination Image control with black. This constant is not available.
copyDstInvert	Inverts the colors of the destination Image control. This constant is not available.
copyImage	Combines the source image with the destination image using the transparency information of the destination image Can be used to include a logo in the destination image for example. Note: Size and position in the source are not taken into account. No homothety and no zoom are allowed in this mode. This constant is not available.
copyMergeCopy	Merges the source Image control and the destination Image control. This constant is not available.
copyMergePaint	Combines the source Image control with the "pattern" of the destination Image control via the "Logical AND" method. This constant is not available.
copyNotSrcCopy	Inverts the colors of the source Image control. This constant is not available.
copyNotSrcErase	Inverts the combination between the source and the destination Image controls via the "OR" method. This constant is not available.
copyPatCopy	Copies the "pattern" from the source Image control to the destination Image control. This constant is not available.
copyPatInvert	Combines the pattern of the source and destination Image controls via the "XOR" (Exclusive Or) method. The current brush, defined by dBackground, is used. This constant is not available.
copyPatPaint	Combines the inverted source Image control with the "pattern" of the destination Image control via the "OR" method. This constant is not available.
copySrcAnd	Combines the pixels of the source and destination Image controls via the "AND" method. This constant is not available.
copySrcCopy (Default value)	Copies the source Image control to the destination Image control (simple copy).
copySrcErase	Inverts the destination Image control and combines the result with the copy of the source Image control. This constant is not available.
copySrcInvert	Combines the pixels of the source and destination Image controls via the "XOR" (Exclusive Or) method. This constant is not available.
copySrcPaint	Combines the pixels of the source and destination Image controls via the "OR" method. This constant is not available.
copyWhiteness	Fills the destination Image control with white. This constant is not available.

X-coordinate (in pixels) of the upper-left corner of the area to copy (upper-left corner of the source Image control by default).

Y-coordinate (in pixels) of the upper-left corner of the area to copy (upper-left corner of the source Image control by default).

Height (in pixels) of the area to copy (height of the source Image control by default).

Width (in pixels) of the area to copy (width of the source Image control by default).

X-coordinate (in pixels) of the upper-left corner of the copy destination area (upper-left corner of the destination Image control by default).

Y-coordinate (in pixels) of the upper-left corner of the copy destination area (upper-left corner of the destination Image control by default).

Height (in pixels) of the area the image will be copied to (height of the destination Image control by default). If this height is greater than the height of the source image, the image will be enlarged when copied.

Width (in pixels) of the area the image will be copied to (width of the destination Image control by default). If this width is greater than the width of the source image, the image will be enlarged when copied.

Copying the images found in the Image variables Hide the details

<Result> = dCopyImage(<Source image name> , <Destination image name> [, <Source image X-coordinate> [, <Source image Y-coordinate> [, <Source image height> [, <Source image width> [, <Destination image X-coordinate> [, <Destination image Y-coordinate> [, <Destination image height> [, <Destination image width>]]]]]]]])

<Result>: Boolean

• True if the image was copied,
• False otherwise.

Note The function dCopyImage function can return False if the screen driver does not support this function. In this case, a message is displayed in the copied image. We recommend that you update your screen driver in order to get the proper behavior.

<Source image name>: Image variable

Name of the Image variable to be used. This image is the source image.

<Destination image name>: Image variable

Name of the Image variable the image will be copied to.

<Source image X-coordinate>: Optional integer

X-coordinate (in pixels) of the upper-left corner of the area to copy (upper-left corner of the source image by default).

<Source image Y-coordinate>: Optional integer

Y-coordinate (in pixels) of the upper-left corner of the area to copy (upper-left corner of the source image by default).

<Source image height>: Optional integer

Height (in pixels) of the area to copy (height of the source image by default).

<Source image width>: Optional integer

Width (in pixels) of the area to copy (width of the source image by default).

<Destination image X-coordinate>: Optional integer

X-coordinate (in pixels) of the upper-left corner of the copy destination area (upper-left corner of the destination image by default).

<Destination image Y-coordinate>: Optional integer

Y-coordinate (in pixels) of the upper-left corner of the copy destination area (upper-left corner of the destination image by default).

<Destination image height>: Optional integer

Height (in pixels) of the area the image will be copied to (height of the destination image by default). If this height is greater than the height of the source image, the image will be enlarged when copied.

<Destination image width>: Optional integer

Width (in pixels) of the area the image will be copied to (width of the destination image by default). If this width is greater than the width of the source image, the image will be enlarged when copied.

Remarks

Zoom on an image

During a copy, you can enlarge or reduce a section of the source image when copying it to the destination image. To do so:

• Define the area to enlarge (or reduce) in the source image (with the <Source image X-coordinate>, <Source image Y-coordinate>, <Source image height> and <Source image width> parameters),
• Define the display area of the result image. This area must be larger to enlarge the image and smaller to reduce the image. By default, the entire destination image is taken into account. Use <Destination image X-coordinate>, <Destination image Y-coordinate>, <Destination image height> and <Destination image width> if necessary.

The zoom percentage depends on the multiplying coefficient between the dimensions of the two areas.

For example:

1. The area to zoom is included in a rectangle whose width is set to 30 pixels and whose height is set to 40 pixels.	2. To set the zoom to 200%, the destination area must be twice as large as the source area. This means that the rectangle's width and height should be set to 60 and 80 pixels, respectively.

To achieve this, the code should be as follows:

dCopyImage(IMG_ChampSource, IMG_ChampDestination, copySrcCopy, 10, 10, 30, 40, 10, 10, 60, 80)

Component: wd300obj.dll

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Minimum version required

• Version 9

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