Platform Package reference: Type XViewportProc

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Platform Package reference

Function EwAlloc()

Function EwAddHeapMemoryPool()

Function EwAllocUserColor()

Function EwAnyPendingSignals()

Function EwBeginUpdate()

Function EwBeginUpdateArea()

Function EwColorToIndex()

Function EwCompString()

Function EwConfigViewport()

Function EwCreateBitmap()

Function EwDoneGraphicsEngine()

Function EwDoneHeap()

Function EwDoneViewport()

Function EwDumpHeap()

Function EwEnableGfxTaskTracing()

Function EwEndUpdate()

Function EwFindUserColor()

Function EwFree()

Function EwFreeBitmap()

Function EwFreeUserColor()

Function EwGetAutoObject()

Function _GetAutoObject()

Function EwGetHeapInfo()

Function EwGetLanguage()

Function EwGetStringLength()

Function EwGetUtf8StringLength()

Function EwGetStyles()

Function EwIndexToColor()

Function EwInitGraphicsEngine()

Function EwInitHeap()

Function EwInitInvocations()

Function EwInitViewport()

Function EwInvoke()

Function EwInvokeCopy()

Function EwLockBitmap()

Function EwLockObject()

Function _LockObject()

Function EwModifyBitmapPalette()

Function EwNewColor()

Function EwNewObject()

Function EwNewObjectIndirect()

Function _NewObject()

Function EwNewPoint()

Function EwNewRect()

Function EwNewString()

Function EwNewStringAnsi()

Function EwNewStringChar()

Function EwNewStringUtf8()

Function EwNextTimerExpiration()

Function EwPrint()

Function EwPrintPerfCounters()

Function EwPrintProfilerStatistic()

Function EwProcessSignals()

Function EwProcessTimers()

Function EwReclaimMemory()

Function EwRegisterFlashAreaReader()

Function _RequestUpdate()

Function EwResetPerfCounters()

Function EwSetLanguage()

Function EwSetStackAddressArea()

Function EwSetStyles()

Function EwSetUserColor()

Function EwStringToAnsi()

Function EwStringToUtf8()

Function EwUnlockBitmap()

Function EwUnlockObject()

Function _UnlockObject()

Function EwVerifyHeap()

Basic Data Type Definitions

Type XBitmapLock

Type XInvokeProc

Type XViewportProc

Error and Warning Codes

Platform Package reference: Type XViewportProc

Description of the type definition XViewportProc available in all Platform Packages for C compatible target systems. This type definition is intended to be used when integrating the Embedded Wizard created GUI application with the underlying graphics subsystem, graphics hardware or other external GUI applications coexisting on the same system.

Declaration

typedef void (*XViewportProc)

(

XViewport* aViewport,

unsigned long aHandle,

void* aDisplay1,

void* aDisplay2,

void* aDisplay3,

XRect aArea

);

Parameters

aViewport

Viewport which has called the callback function.

aHandle

Low level reference to the real viewport, the framebuffer, the window instance, etc. This value depends on the particular platform system.

aDisplay1, aDisplay2, aDisplay3

Platform dependent values, where already existing framebuffer or drawing context, etc. are stored. These values are passed during the initialization of the viewport (see EwInitViewport()).

aArea

Area modified by the update relative to the top-left corner of the viewport.

Discussion

The type declaration XViewportProc defines a prototype of a user defined function, which can be passed as callback during the initialization of a viewport when calling the function EwInitViewport(). This callback function will then be called each time the viewport update cycle terminates. In this manner some kind of viewport specific completion can be implemented.