GreGetGlobalViewingXform

GreGetGlobalViewingXform queries the global viewing transform matrix. On completion, paXformData points to an array of two-dimensional values that defines the global viewing transform matrix.

This function can be hooked by the presentation driver.

Simulation support

This function is simulated by a handling routine in the graphics engine.

Syntax

 GreGetGlobalViewingXform(hdc, paXformData, pInstance, lFunction)

Parameters

hdc (HDC) - input

Device context handle.

paXformData (PXFORM) - input

Pointer to return data

Pointer to return data in which the array of six matrix elements (M11, M12, M21, M22, M41, and M42) are to be stored.

pInstance (PVOID) - input

Pointer to instance data.

lFunction (ULONG) - input

High-order WORD=flags; low-order WORD=NGreGetGlobalViewingXform.

Returns

fSuccess (BOOL) - returns

Return codes.

This function returns BOOLEAN (fSuccess).

• TRUE Successful
• FALSE Error

Possible Errors Detected

When an error is detected, the handling routine must call WinSetErrorInfo to post the condition. Error codes for conditions that the handling routine is expected to check include:

• PMERR_HDC_BUSY
• PMERR_INV_HDC

Refer to the "Error Explanations" section in the Presentation Manager Programming Reference for further explanation.