Xojo Conferences
XDCMay2019MiamiUSA

Platforms to show: All Mac Windows Linux Cross-Platform

PictureToPNGStringMBS(pic as picture, gamma as single = 0.0) as string
Type Topic Plugin Version macOS Windows Linux Console & Web iOS
global method PNG MBS Images Plugin 6.4 Yes Yes Yes Yes No
Function: Saves a picture to a PNG string.
Notes:
If the picture has no mask, no alpha channel is written to the file.
Returns "" on any error.

The gamma parameter defines what gamma correction is applied:
positive value: use the value as the gamma correction
zero: use default value (or value saved in file itself)
negative value: do not correct gamma

See also:

Some examples using this method:

Some FAQ entries about this method:

Feedback, Comments & Corrections

PictureToPNGStringMBS(pic as picture, gamma as single, Interlace as Boolean, FilterType as Integer) as string
Type Topic Plugin Version macOS Windows Linux Console & Web iOS
global method PNG MBS Images Plugin 8.4 Yes Yes Yes Yes No
Function: Saves a palette based RGB picture as a PNG file.
Notes:
If the picture has no mask, no alpha channel is written to the file.
Colors must be an array with 256 values defining the palette.

Returns true on success and false on failure.

The gamma parameter defines what gamma correction is applied:
positive value: use the value as the gamma correction
zero: use default value (or value saved in file itself)
negative value: do not correct gamma

If Interlace is true the Adam7 interlacing is used.
FilterType specifies the filter:

const PNG_NO_FILTERS= 0
const PNG_FILTER_NONE= 8
const PNG_FILTER_SUB= 16
const PNG_FILTER_UP= 32
const PNG_FILTER_AVG= 64
const PNG_FILTER_PAETH= 128
const PNG_FILTER_ALL= 248

See also:

Some examples using this method:

Some FAQ entries about this method:

Feedback, Comments & Corrections

PictureToPNGStringMBS(pic as picture, mask as picture, gamma as single = 0.0) as string
Type Topic Plugin Version macOS Windows Linux Console & Web iOS
global method PNG MBS Images Plugin 6.4 Yes Yes Yes Yes No
Function: Saves a picture to a PNG string.
Notes:
Returns "" on any error.

It uses the mask passed. If nil, no alpha channel is written to the file.
The mask from the picture is ignored.

The gamma parameter defines what gamma correction is applied:
positive value: use the value as the gamma correction
zero: use default value (or value saved in file itself)
negative value: do not correct gamma

See also:

Some examples using this method:

Some FAQ entries about this method:

Feedback, Comments & Corrections

PictureToPNGStringMBS(pic as picture, mask as picture, gamma as single, Interlace as Boolean, FilterType as Integer) as string
Type Topic Plugin Version macOS Windows Linux Console & Web iOS
global method PNG MBS Images Plugin 6.4 Yes Yes Yes Yes No
Function: Saves a picture to a PNG string.
Notes:
Returns "" on any error.

It uses the mask passed. If nil, no alpha channel is written to the file.
The mask from the picture is ignored.

The gamma parameter defines what gamma correction is applied:
positive value: use the value as the gamma correction
zero: use default value (or value saved in file itself)
negative value: do not correct gamma

If Interlace is true the Adam7 interlacing is used.
FilterType specifies the filter:

const PNG_NO_FILTERS= 0
const PNG_FILTER_NONE= 8
const PNG_FILTER_SUB= 16
const PNG_FILTER_UP= 32
const PNG_FILTER_AVG= 64
const PNG_FILTER_PAETH= 128
const PNG_FILTER_ALL= 248

See also:

Some examples using this method:

Some FAQ entries about this method:

Feedback, Comments & Corrections

PNGStringToPictureMBS(data as string, gamma as single = 0.0, AllowDamaged as boolean = false) as picture
Type Topic Plugin Version macOS Windows Linux Console & Web iOS
global method PNG MBS Images Plugin 6.4 Yes Yes Yes Yes No
Function: Reads PNG data from a string variable.
Notes:
If the picture has an alpah channel the returned picture will have a mask.

Returns picture on success and nil on failure.

The gamma parameter defines what gamma correction is applied:
positive value: use the value as the gamma correction
zero: use default value (or value saved in file itself)
negative value: do not correct gamma

AllowDamaged: Whether to allow damaged PNG files to return a part of the image as picture.

Some examples using this method:

Some FAQ entries about this method:

Feedback, Comments & Corrections

PNGStringToPNGPictureMBS(data as string, gamma as single = 0.0, AllowDamaged as boolean = false) as PNGPictureMBS
Type Topic Plugin Version macOS Windows Linux Console & Web iOS
global method PNG MBS Images Plugin 6.4 Yes Yes Yes Yes No
Function: Reads PNG data from a string variable.
Notes:
Returns PNGPictureMBS object on success and nil on failure.

The gamma parameter defines what gamma correction is applied:
positive value: use the value as the gamma correction
zero: use default value (or value saved in file itself)
negative value: do not correct gamma

AllowDamaged: Whether to allow damaged PNG files to return a part of the image as picture.

Some FAQ entries about this method:

Feedback, Comments & Corrections

The items on this page are in the following plugins: MBS Images Plugin.




Links
MBS FileMaker Plugins