2.2.7.56 MILCMD_TARGET_CAPTUREBITS
The MILCMD_TARGET_CAPTUREBITS packet enqueues a capture request to a rendering target. The client MUST respond with a MILMSG_CAPTUREBITSREPLY notification containing the pixels representing the rasterization of the specified area with any modifications specified by the MILCMD_VISUALGROUP, MILCMD_VISUAL_ADDRENDERPARAMETER or MILCMD_WINDOWNODE_PROTECTCONTENT packets.
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messageSize |
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controlCode |
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targetResource |
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x |
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y |
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width |
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height |
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dxgiFormat |
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unused |
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... |
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messageSize (4 bytes): A 32-bit unsigned integer. The size of this message in bytes. The value of this field MUST be set to 0x00000028.
controlCode (4 bytes): A 32-bit unsigned integer containing the control code for this message. The value of this field MUST be equal to 0x00000049.
targetResource (4 bytes): A 32-bit unsigned integer. The value of this field MUST be set to a valid resource handle referencing a resource of type TYPE_HWNDRENDERTARGET, TYPE_DESKTOPRENDERTARGET or TYPE_METABITMAPRENDERTARGET. This handle identifies the resource that is the target for this message.
x (4 bytes): A 32-bit unsigned integer. The X-coordinate of the top-left corner of the requested capture area.
y (4 bytes): A 32-bit unsigned integer. The Y-coordinate of the top-left corner of the requested capture area.
width (4 bytes): A 32-bit unsigned integer. The width of the requested capture area in pixels.
height (4 bytes): A 32-bit unsigned integer. The height of the requested capture area in pixels.
dxgiFormat (4 bytes): A DXGI_FORMAT enumeration. The pixel format to be used by the composition engine when capturing the specified area.
unused (8 bytes): A 64-bit unsigned integer. This field is unused and MUST be set to zero.