//*****************************************************************************
//
//! Sets the extents of the clipping region.
//!
//! \param psContext is a pointer to the drawing context to use.
//! \param pRect is a pointer to the structure containing the extents of the
//! clipping region.
//!
//! This function sets the extents of the clipping region. The clipping region
//! is not allowed to exceed the extents of the screen, but may be a portion of
//! the screen.
//!
//! The supplied coordinate are inclusive; \e i16XMin of 1 and \e i16XMax of 1
//! will define a clipping region that will display only the pixels in the
//! X = 1 column. A consequence of this is that the clipping region must
//! contain at least one row and one column.
//!
//! \return None.
//
//*****************************************************************************
void
GrContextClipRegionSet(tContext *psContext, tRectangle *pRect)
{
uint32_t ui32W, ui32H;
//
// Check the arguments.
//
ASSERT(psContext);
ASSERT(pRect);
//
// Get the width and height of the display.
//
ui32W = DpyWidthGet(psContext->psDisplay);
ui32H = DpyHeightGet(psContext->psDisplay);
//
// Set the extents of the clipping region, forcing them to reside within
// the extents of the screen.
//
psContext->sClipRegion.i16XMin = ((pRect->i16XMin < 0) ? 0 :
((pRect->i16XMin >= ui32W) ? (ui32W - 1) :
pRect->i16XMin));
psContext->sClipRegion.i16YMin = ((pRect->i16YMin < 0) ? 0 :
((pRect->i16YMin >= ui32H) ? (ui32H - 1) :
pRect->i16YMin));
psContext->sClipRegion.i16XMax = ((pRect->i16XMax < 0) ? 0 :
((pRect->i16XMax >= ui32W) ? (ui32W - 1) :
pRect->i16XMax));
psContext->sClipRegion.i16YMax = ((pRect->i16YMax < 0) ? 0 :
((pRect->i16YMax >= ui32H) ? (ui32H - 1) :
pRect->i16YMax));
}
//*****************************************************************************
//
//! Sets the extents of the clipping region.
//!
//! \param pContext is a pointer to the drawing context to use.
//! \param pRect is a pointer to the structure containing the extents of the
//! clipping region.
//!
//! This function sets the extents of the clipping region. The clipping region
//! is not allowed to exceed the extents of the screen, but may be a portion of
//! the screen.
//!
//! The supplied coordinate are inclusive; \e sXMin of 1 and \e sXMax of 1 will
//! define a clipping region that will display only the pixels in the X = 1
//! column. A consequence of this is that the clipping region must contain
//! at least one row and one column.
//!
//! \return None.
//
//*****************************************************************************
void
GrContextClipRegionSet(tContext *pContext, tRectangle *pRect)
{
unsigned long ulW, ulH;
//
// Check the arguments.
//
ASSERT(pContext);
ASSERT(pRect);
//
// Get the width and height of the display.
//
ulW = DpyWidthGet(pContext->pDisplay);
ulH = DpyHeightGet(pContext->pDisplay);
//
// Set the extents of the clipping region, forcing them to reside within
// the extents of the screen.
//
pContext->sClipRegion.sXMin = ((pRect->sXMin < 0) ? 0 :
((pRect->sXMin >= ulW) ? (ulW - 1) :
pRect->sXMin));
pContext->sClipRegion.sYMin = ((pRect->sYMin < 0) ? 0 :
((pRect->sYMin >= ulH) ? (ulH - 1) :
pRect->sYMin));
pContext->sClipRegion.sXMax = ((pRect->sXMax < 0) ? 0 :
((pRect->sXMax >= ulW) ? (ulW - 1) :
pRect->sXMax));
pContext->sClipRegion.sYMax = ((pRect->sYMax < 0) ? 0 :
((pRect->sYMax >= ulH) ? (ulH - 1) :
pRect->sYMax));
}
