//*****************************************************************************
//
//! Draws a vertical line.
//!
//! \param pContext is a pointer to the drawing context to use.
//! \param i32X is the X coordinate of the line.
//! \param i32Y1 is the Y coordinate of one end of the line.
//! \param i32Y2 is the Y coordinate of the other end of the line.
//!
//! This function draws a vertical line, taking advantage of the fact that the
//! line is vertical to draw it more efficiently. The clipping of the vertical
//! line to the clipping rectangle is performed within this routine; the
//! display driver's vertical line routine is used to perform the actual line
//! drawing.
//!
//! \return None.
//
//*****************************************************************************
void
GrLineDrawV(const tContext *pContext, int32_t i32X, int32_t i32Y1,
int32_t i32Y2)
{
int32_t i32Temp;
//
// Check the arguments.
//
ASSERT(pContext);
//
// If the X coordinate of this line is not within the clipping region, then
// there is nothing to be done.
//
if((i32X < pContext->sClipRegion.i16XMin) ||
(i32X > pContext->sClipRegion.i16XMax))
{
return;
}
//
// Swap the Y coordinates if the first is larger than the second.
//
if(i32Y1 > i32Y2)
{
i32Temp = i32Y1;
i32Y1 = i32Y2;
i32Y2 = i32Temp;
}
//
// If the entire line is out of the clipping region, then there is nothing
// to be done.
//
if((i32Y1 > pContext->sClipRegion.i16YMax) ||
(i32Y2 < pContext->sClipRegion.i16YMin))
{
return;
}
//
// Clip the starting coordinate to the top side of the clipping region if
// required.
//
if(i32Y1 < pContext->sClipRegion.i16YMin)
{
i32Y1 = pContext->sClipRegion.i16YMin;
}
//
// Clip the ending coordinate to the bottom side of the clipping region if
// required.
//
if(i32Y2 > pContext->sClipRegion.i16YMax)
{
i32Y2 = pContext->sClipRegion.i16YMax;
}
//
// Call the low level vertical line drawing routine.
//
DpyLineDrawV(pContext->psDisplay, i32X, i32Y1, i32Y2,
pContext->ui32Foreground);
}
//*****************************************************************************
//
//! Draws a vertical line.
//!
//! \param pContext is a pointer to the drawing context to use.
//! \param lX is the X coordinate of the line.
//! \param lY1 is the Y coordinate of one end of the line.
//! \param lY2 is the Y coordinate of the other end of the line.
//!
//! This function draws a vertical line, taking advantage of the fact that the
//! line is vertical to draw it more efficiently. The clipping of the vertical
//! line to the clipping rectangle is performed within this routine; the
//! display driver's vertical line routine is used to perform the actual line
//! drawing.
//!
//! \return None.
//
//*****************************************************************************
void
GrLineDrawV(const tContext *pContext, long lX, long lY1, long lY2)
{
long lTemp;
//
// Check the arguments.
//
ASSERT(pContext);
//
// If the X coordinate of this line is not within the clipping region, then
// there is nothing to be done.
//
if((lX < pContext->sClipRegion.sXMin) ||
(lX > pContext->sClipRegion.sXMax))
{
return;
}
//
// Swap the Y coordinates if the first is larger than the second.
//
if(lY1 > lY2)
{
lTemp = lY1;
lY1 = lY2;
lY2 = lTemp;
}
//
// If the entire line is out of the clipping region, then there is nothing
// to be done.
//
if((lY1 > pContext->sClipRegion.sYMax) ||
(lY2 < pContext->sClipRegion.sYMin))
{
return;
}
//
// Clip the starting coordinate to the top side of the clipping region if
// required.
//
if(lY1 < pContext->sClipRegion.sYMin)
{
lY1 = pContext->sClipRegion.sYMin;
}
//
// Clip the ending coordinate to the bottom side of the clipping region if
// required.
//
if(lY2 > pContext->sClipRegion.sYMax)
{
lY2 = pContext->sClipRegion.sYMax;
}
//
// Call the low level vertical line drawing routine.
//
DpyLineDrawV(pContext->pDisplay, lX, lY1, lY2, pContext->ulForeground);
}
