Enum IFFlags

Flags for uiimage.find and similar functions.

[Flags]
public enum IFFlags

Namespace: Au.Types

Assembly: Au.dll

Fields

Name Description

Parallel

Name	Description
Parallel	This flag can make the function faster when image is a list of images. To search for each image, the function will use System.Threading.Tasks.Parallel.For instead of for. For example, if the CPU has 4 cores (8 threads), can search for max 8 images simultaneously. However it does not mean it will be 8 times faster. Can be max 2 or 3 times faster, depending on the number of images, flag WindowDC, diff, also, CPU, RAM, area size, finds or not, image position, etc. Can be even slower. To measure speed, use perf. If used also callback function, it runs in any thread and any order, but one at a time (inside `lock() { }`).
PrintWindow	Use API PrintWindow to get window pixels. Like WindowDC, works with background windows, etc. Differences: On Windows 8.1 and later works with windows where WindowDC doesn't. Works without Aero theme too. Slower. Some windows flicker. From some controls randomly gets partial image (API bug). Does not work with windows of higher UAC integrity level (throws exception). Unreliable with DPI-scaled windows; the window image slightly changes when resizing etc.
WindowDC	Get pixels from the device context (DC) of the window client area, not from screen DC. Usually much faster. Can get pixels from window parts that are covered by other windows or offscreen. But not from hidden and minimized windows. Does not work on Windows 7 if Aero theme is turned off. Then this flag is ignored. Cannot find images in some windows (including Windows Store apps), and in some window parts (glass). All pixels captured from these windows/parts are black. If the window is partially or completely transparent, the image must be captured from its non-transparent version. If the window is DPI-scaled, the image must be captured from its non-scaled version. However if used a limiting rectangle, it must contain scaled coordinates.

This flag can make the function faster when image is a list of images. To search for each image, the function will use System.Threading.Tasks.Parallel.For instead of for. For example, if the CPU has 4 cores (8 threads), can search for max 8 images simultaneously. However it does not mean it will be 8 times faster. Can be max 2 or 3 times faster, depending on the number of images, flag WindowDC, diff, also, CPU, RAM, area size, finds or not, image position, etc. Can be even slower. To measure speed, use perf. If used also callback function, it runs in any thread and any order, but one at a time (inside lock() { }).

PrintWindow

Use API PrintWindow to get window pixels. Like WindowDC, works with background windows, etc. Differences:

On Windows 8.1 and later works with windows where WindowDC doesn't.
Works without Aero theme too.
Slower.
Some windows flicker.
From some controls randomly gets partial image (API bug).
Does not work with windows of higher UAC integrity level (throws exception).
Unreliable with DPI-scaled windows; the window image slightly changes when resizing etc.

WindowDC

Get pixels from the device context (DC) of the window client area, not from screen DC. Usually much faster. Can get pixels from window parts that are covered by other windows or offscreen. But not from hidden and minimized windows. Does not work on Windows 7 if Aero theme is turned off. Then this flag is ignored. Cannot find images in some windows (including Windows Store apps), and in some window parts (glass). All pixels captured from these windows/parts are black. If the window is partially or completely transparent, the image must be captured from its non-transparent version. If the window is DPI-scaled, the image must be captured from its non-scaled version. However if used a limiting rectangle, it must contain scaled coordinates.

Extension Methods

ExtMisc.HasAny<IFFlags>(IFFlags, IFFlags)

ExtMisc.Has<IFFlags>(IFFlags, IFFlags)

ExtMisc.SetFlag<IFFlags>(ref IFFlags, IFFlags, bool)