static void onDraw(tContext *pContext)
{
// first draw the datetime
uint8_t totalgrid = window_readconfig()->sports_grid + 3;
GrContextForegroundSet(pContext, ClrWhite);
switch(window_readconfig()->sports_grid)
{
case GRID_3:
GrRectFill(pContext, ®ion_3grid[0]);
GrLineDrawV(pContext, region_3grid[1].sXMax, region_3grid[1].sYMin, region_3grid[1].sYMax);
break;
case GRID_4:
GrRectFill(pContext, ®ion_4grid[0]);
GrLineDrawH(pContext, region_4grid[1].sXMin, region_4grid[1].sXMax, region_4grid[1].sYMax);
GrLineDrawH(pContext, region_4grid[2].sXMin, region_4grid[2].sXMax, region_4grid[2].sYMax);
break;
case GRID_5:
GrRectFill(pContext, ®ion_5grid[0]);
GrLineDrawH(pContext, region_5grid[1].sXMin, region_5grid[2].sXMax, region_5grid[1].sYMax);
GrLineDrawV(pContext, region_5grid[1].sXMax, region_5grid[1].sYMin, region_5grid[3].sYMax);
break;
}
GrContextForegroundSet(pContext, ClrWhite);
for(uint8_t g = 0; g < totalgrid; g++)
{
drawGridData(pContext, window_readconfig()->sports_grid_data[g] , grid_data[g]);
}
}
//*****************************************************************************
//
//! Draws a rectangle.
//!
//! \param pContext is a pointer to the drawing context to use.
//! \param pRect is a pointer to the structure containing the extents of the
//! rectangle.
//!
//! This function draws a rectangle. The rectangle will extend from \e i32XMin
//! to \e i32XMax and \e i32YMin to \e i32YMax, inclusive.
//!
//! \return None.
//
//*****************************************************************************
void
GrRectDraw(const tContext *pContext, const tRectangle *pRect)
{
//
// Check the arguments.
//
ASSERT(pContext);
ASSERT(pRect);
//
// Draw a line across the top of the rectangle.
//
GrLineDrawH(pContext, pRect->i16XMin, pRect->i16XMax, pRect->i16YMin);
//
// Return if the rectangle is one pixel tall.
//
if(pRect->i16YMin == pRect->i16YMax)
{
return;
}
//
// Draw a line down the right side of the rectangle.
//
GrLineDrawV(pContext, pRect->i16XMax, pRect->i16YMin + 1, pRect->i16YMax);
//
// Return if the rectangle is one pixel wide.
//
if(pRect->i16XMin == pRect->i16XMax)
{
return;
}
//
// Draw a line across the bottom of the rectangle.
//
GrLineDrawH(pContext, pRect->i16XMax - 1, pRect->i16XMin, pRect->i16YMax);
//
// Return if the rectangle is two pixels tall.
//
if((pRect->i16YMin + 1) == pRect->i16YMax)
{
return;
}
//
// Draw a line up the left side of the rectangle.
//
GrLineDrawV(pContext, pRect->i16XMin, pRect->i16YMax - 1,
pRect->i16YMin + 1);
}
//*****************************************************************************
//
// Handle keyboard updates.
//
//*****************************************************************************
void
HandleKeyboard(void)
{
//
// Nothing to do if the keyboard is not active.
//
if(g_i32ScreenIdx != SCREEN_KEYBOARD) {
return;
}
//
// If the mid value is hit then clear the cursor.
//
if(g_ui32CursorDelay == KEYBOARD_BLINK_RATE / 2) {
GrContextForegroundSet(&g_sContext, ClrBlack);
//
// Keep the counter moving now that the clearing has been handled.
//
g_ui32CursorDelay--;
} else if(g_ui32CursorDelay == 0) {
GrContextForegroundSet(&g_sContext, ClrWhite);
//
// Reset the blink delay now that the drawing of the cursor has been
// handled.
//
g_ui32CursorDelay = KEYBOARD_BLINK_RATE;
} else {
return;
}
//
// Draw the cursor only if it is time.
//
GrLineDrawV(&g_sContext, BG_MIN_X + g_i32StringWidth , BG_MIN_Y + 20,
BG_MIN_Y + 40);
}
//*****************************************************************************
//
//! Draws a line.
//!
//! \param pContext is a pointer to the drawing context to use.
//! \param i32X1 is the X coordinate of the start of the line.
//! \param i32Y1 is the Y coordinate of the start of the line.
//! \param i32X2 is the X coordinate of the end of the line.
//! \param i32Y2 is the Y coordinate of the end of the line.
//!
//! This function draws a line, utilizing GrLineDrawH() and GrLineDrawV() to
//! draw the line as efficiently as possible. The line is clipped to the
//! clippping rectangle using the Cohen-Sutherland clipping algorithm, and then
//! scan converted using Bresenham's line drawing algorithm.
//!
//! \return None.
//
//*****************************************************************************
void
GrLineDraw(const tContext *pContext, int32_t i32X1, int32_t i32Y1,
int32_t i32X2, int32_t i32Y2)
{
int32_t i32Error, i32DeltaX, i32DeltaY, i32YStep, bSteep;
//
// Check the arguments.
//
ASSERT(pContext);
//
// See if this is a vertical line.
//
if(i32X1 == i32X2)
{
//
// It is more efficient to avoid Bresenham's algorithm when drawing a
// vertical line, so use the vertical line routine to draw this line.
//
GrLineDrawV(pContext, i32X1, i32Y1, i32Y2);
//
// The line has ben drawn, so return.
//
return;
}
//
// See if this is a horizontal line.
//
if(i32Y1 == i32Y2)
{
//
// It is more efficient to avoid Bresenham's algorithm when drawing a
// horizontal line, so use the horizontal line routien to draw this
// line.
//
GrLineDrawH(pContext, i32X1, i32X2, i32Y1);
//
// The line has ben drawn, so return.
//
return;
}
//
// Clip this line if necessary, and return without drawing anything if the
// line does not cross the clipping region.
//
if(GrLineClip(pContext, &i32X1, &i32Y1, &i32X2, &i32Y2) == 0)
{
return;
}
//
// Determine if the line is steep. A steep line has more motion in the Y
// direction than the X direction.
//
if(((i32Y2 > i32Y1) ? (i32Y2 - i32Y1) : (i32Y1 - i32Y2)) >
((i32X2 > i32X1) ? (i32X2 - i32X1) : (i32X1 - i32X2)))
{
bSteep = 1;
}
else
{
bSteep = 0;
}
//
// If the line is steep, then swap the X and Y coordinates.
//
if(bSteep)
{
i32Error = i32X1;
i32X1 = i32Y1;
i32Y1 = i32Error;
i32Error = i32X2;
i32X2 = i32Y2;
i32Y2 = i32Error;
}
//
// If the starting X coordinate is larger than the ending X coordinate,
// then swap the start and end coordinates.
//
if(i32X1 > i32X2)
{
i32Error = i32X1;
i32X1 = i32X2;
i32X2 = i32Error;
i32Error = i32Y1;
i32Y1 = i32Y2;
i32Y2 = i32Error;
}
//
// Compute the difference between the start and end coordinates in each
// axis.
//
i32DeltaX = i32X2 - i32X1;
i32DeltaY = (i32Y2 > i32Y1) ? (i32Y2 - i32Y1) : (i32Y1 - i32Y2);
//
// Initialize the error term to negative half the X delta.
//
i32Error = -i32DeltaX / 2;
//
// Determine the direction to step in the Y axis when required.
//
if(i32Y1 < i32Y2)
{
i32YStep = 1;
}
else
{
i32YStep = -1;
}
//
// Loop through all the points along the X axis of the line.
//
for(; i32X1 <= i32X2; i32X1++)
{
//
// See if this is a steep line.
//
if(bSteep)
{
//
// Plot this point of the line, swapping the X and Y coordinates.
//
DpyPixelDraw(pContext->psDisplay, i32Y1, i32X1,
pContext->ui32Foreground);
}
else
{
//
// Plot this point of the line, using the coordinates as is.
//
DpyPixelDraw(pContext->psDisplay, i32X1, i32Y1,
pContext->ui32Foreground);
}
//
// Increment the error term by the Y delta.
//
i32Error += i32DeltaY;
//
// See if the error term is now greater than zero.
//
if(i32Error > 0)
{
//
// Take a step in the Y axis.
//
i32Y1 += i32YStep;
//
// Decrement the error term by the X delta.
//
i32Error -= i32DeltaX;
}
}
}
//*****************************************************************************
//
//! Draws the strip chart into a drawing context, off-screen buffer.
//!
//! \param psChartWidget points at the StripsChartWidget being processed.
//! \param psContext points to the context where all drawing should be done.
//!
//! This function renders a strip chart into a drawing context.
//! It assumes that the drawing context is an off-screen buffer, and that
//! the entire buffer belongs to this widget.
//!
//! \return None.
//
//*****************************************************************************
void
StripChartDraw(tStripChartWidget *psChartWidget, tContext *psContext)
{
tStripChartAxis *psAxisY;
int32_t i32Y;
int32_t i32Ygrid;
int32_t i32X;
int32_t i32GridRange;
int32_t i32DispRange;
int32_t i32GridMin;
int32_t i32DispMax;
tStripChartSeries *psSeries;
//
// Check the parameters
//
ASSERT(psChartWidget);
ASSERT(psContext);
ASSERT(psChartWidget->psAxisY);
//
// Get handy pointer to Y axis
//
psAxisY = psChartWidget->psAxisY;
//
// Find the range of Y axis in Y axis units
//
i32GridRange = psAxisY->i32Max - psAxisY->i32Min;
//
// Find the range of the Y axis in display units (pixels)
//
i32DispRange = (psContext->sClipRegion.i16YMax -
psContext->sClipRegion.i16YMin);
//
// Find the minimum Y units value to be shown, and the maximum of the
// clipping region.
//
i32GridMin = psAxisY->i32Min;
i32DispMax = psContext->sClipRegion.i16YMax;
//
// Set the fg color for the rectangle fill to match what we want as the
// chart background.
//
GrContextForegroundSet(psContext, psChartWidget->ui32BackgroundColor);
GrRectFill(psContext, &psContext->sClipRegion);
//
// Draw vertical grid lines
//
GrContextForegroundSet(psContext, psChartWidget->ui32GridColor);
for(i32X = psChartWidget->i32GridX; i32X < psContext->sClipRegion.i16XMax;
i32X += psChartWidget->psAxisX->i32GridInterval)
{
GrLineDrawV(psContext, psContext->sClipRegion.i16XMax - i32X,
psContext->sClipRegion.i16YMin,
psContext->sClipRegion.i16YMax);
}
//
// Draw horizontal grid lines
//
for(i32Ygrid = psAxisY->i32Min; i32Ygrid < psAxisY->i32Max;
i32Ygrid += psAxisY->i32GridInterval)
{
i32Y = ((i32Ygrid - i32GridMin) * i32DispRange) / i32GridRange;
i32Y = i32DispMax - i32Y;
GrLineDrawH(psContext, psContext->sClipRegion.i16XMin,
psContext->sClipRegion.i16XMax, i32Y);
}
//
// Compute location of Y=0 line, and draw it
//
i32Y = ((-i32GridMin) * i32DispRange) / i32GridRange;
i32Y = i32DispMax - i32Y;
GrLineDrawH(psContext, psContext->sClipRegion.i16XMin,
psContext->sClipRegion.i16XMax, i32Y);
//
// Iterate through each series to draw it
//
psSeries = psChartWidget->psSeries;
while(psSeries)
{
int idx = 0;
//
// Find the starting X position on the display for this series.
// If the series has less data points than can fit on the display
// then starting X can be somewhere in the middle of the screen.
//
i32X = 1 + psContext->sClipRegion.i16XMax - psSeries->ui16NumItems;
//
// If the starting X is off the left side of the screen, then the
// staring index (idx) for reading data needs to be adjusted to the
// first value in the series that will be visible on the screen
//
if(i32X < psContext->sClipRegion.i16XMin)
{
idx = psContext->sClipRegion.i16XMin - i32X;
i32X = psContext->sClipRegion.i16XMin;
}
//
// Set the drawing color for this series
//
GrContextForegroundSet(psContext, psSeries->ui32Color);
//
// Scan through all possible X values, find the Y value, and draw the
// pixel.
//
for(; i32X <= psContext->sClipRegion.i16XMax; i32X++)
{
//
// Find the Y value at each position in the data series. Take into
// account the data size and the stride
//
if(psSeries->ui8DataTypeSize == 1)
{
i32Y =
((int8_t *)psSeries->pvData)[idx * psSeries->ui8Stride];
}
else if(psSeries->ui8DataTypeSize == 2)
{
i32Y =
((int16_t *)psSeries->pvData)[idx * psSeries->ui8Stride];
}
else if(psSeries->ui8DataTypeSize == 4)
{
i32Y =
((int32_t *)psSeries->pvData)[idx * psSeries->ui8Stride];
}
else
{
//
// If there is an invalid data size, then just force Y value
// to be off the display
//
i32Y = i32DispMax + 1;
break;
}
//
// Advance to the next position in the data series.
//
idx++;
//
// Now scale the Y value according to the axis scaling
//
i32Y = ((i32Y - i32GridMin) * i32DispRange) / i32GridRange;
i32Y = i32DispMax - i32Y;
//
// Draw the pixel on the display
//
GrPixelDraw(psContext, i32X, i32Y);
}
//
// Advance to the next series until there are no more.
//
psSeries = psSeries->psNextSeries;
}
//
// Draw a frame around the entire chart.
//
GrContextForegroundSet(psContext, psChartWidget->ui32Y0Color);
GrRectDraw(psContext, &psContext->sClipRegion);
//
// Draw titles
//
GrContextForegroundSet(psContext, psChartWidget->ui32TextColor);
GrContextFontSet(psContext, psChartWidget->psFont);
//
// Draw the chart title, if there is one
//
if(psChartWidget->pcTitle)
{
GrStringDrawCentered(psContext, psChartWidget->pcTitle, -1,
psContext->sClipRegion.i16XMax / 2,
GrFontHeightGet(psChartWidget->psFont), 0);
}
//
// Draw the Y axis max label, if there is one
//
if(psChartWidget->psAxisY->pcMaxLabel)
{
GrStringDraw(psContext, psChartWidget->psAxisY->pcMaxLabel, -1,
psContext->sClipRegion.i16XMin +
GrFontMaxWidthGet(psChartWidget->psFont) / 2,
GrFontHeightGet(psChartWidget->psFont) / 2, 0);
}
//
// Draw the Y axis min label, if there is one
//
if(psChartWidget->psAxisY->pcMinLabel)
{
GrStringDraw(psContext, psChartWidget->psAxisY->pcMinLabel, -1,
psContext->sClipRegion.i16XMin +
GrFontMaxWidthGet(psChartWidget->psFont) / 2,
psContext->sClipRegion.i16YMax -
(GrFontHeightGet(psChartWidget->psFont) +
(GrFontHeightGet(psChartWidget->psFont) / 2)),
0);
}
//
// Draw a label for the name of the Y axis, if there is one
//
if(psChartWidget->psAxisY->pcName)
{
GrStringDraw(psContext, psChartWidget->psAxisY->pcName, -1,
psContext->sClipRegion.i16XMin + 1,
(psContext->sClipRegion.i16YMax / 2) -
(GrFontHeightGet(psChartWidget->psFont) / 2),
1);
}
}
void window_button(tContext *pContext, uint8_t key, uint8_t icon_type, const char* text)
{
int width;
int i;
long forecolor, backcolor;
uint8_t upshift = 0;
if (key & 0x80)
{
forecolor = ClrBlack;
backcolor = ClrWhite;
key &= ~(0x80);
}
else
{
forecolor = ClrWhite;
backcolor = ClrBlack;
}
const tRectangle *rect= &button_rect[key];
if((icon_type&0x80) == 0x80)
upshift = 13;
//Draw button text
GrContextFontSet(pContext, &g_sFontBaby16);
if (text)
{
GrContextForegroundSet(pContext, backcolor);
if(key == KEY_EXIT)
GrStringDraw(pContext, text, -1, rect->sXMax+3, rect->sYMin - upshift , 0);
else
{
width = GrStringWidthGet(pContext, text, -1);
if(icon_type == BUTTON_NO_ICON)
GrStringDraw(pContext, text, -1, (rect->sXMax - width ), rect->sYMin- upshift , 0);
else
GrStringDraw(pContext, text, -1, (rect->sXMin - width - 3), rect->sYMin- upshift , 0);
}
}
//Draw button icon image
switch(icon_type&0x0f)
{
case TRIANGLE_UP:
for(i=0; i<7;i++)
{
GrLineDrawH(pContext, rect->sXMin+i, rect->sXMax-i, rect->sYMax - 2 - upshift - i);
}
break;
case TRIANGLE_DOWN:
for(i=0; i<7;i++)
{
GrLineDrawH(pContext, rect->sXMin+i, rect->sXMax-i, rect->sYMin + 2 - upshift + i);
}
break;
case TRIANGLE_RIGHT:
for(i=0; i<7;i++)
{
GrLineDrawV(pContext, rect->sXMin+i, rect->sYMin - upshift +i , rect->sYMax - upshift -i);
}
break;
case TRIANGLE_LEFT:
for(i=0; i<7;i++)
{
GrLineDrawV(pContext, rect->sXMax-i, rect->sYMin - upshift +i , rect->sYMax - upshift -i);
}
break;
case MUSIC_PAUSE:
{
tRectangle rect1 = {rect->sXMin, rect->sYMin - upshift , rect->sXMin + 3 , rect->sYMax - upshift};
GrRectFill(pContext, &rect1);
tRectangle rect2 = {rect->sXMin+6 , rect->sYMin - upshift , rect->sXMin + 9 , rect->sYMax - upshift};
GrRectFill(pContext, &rect2);
}
break;
case MUSIC_NEXT:
for(i=0; i<7;i++)
{
GrLineDrawV(pContext, rect->sXMin+i, rect->sYMin - upshift + i , rect->sYMax - upshift - i);
}
GrLineDrawV(pContext, rect->sXMax+2, rect->sYMin - upshift , rect->sYMax - upshift );
break;
case MUSIC_PREVIOUS:
for(i=0; i<7;i++)
{
GrLineDrawV(pContext, rect->sXMax-i, rect->sYMin- upshift + i , rect->sYMax - upshift -i);
}
GrLineDrawV(pContext, rect->sXMin-2, rect->sYMin - upshift , rect->sYMax - upshift);
break;
case BUTTON_NO_ICON:
default:
break;
}
}
static void OnDraw(tContext *pContext)
{
char buf[20];
// clear screen
GrContextForegroundSet(pContext, ClrBlack);
GrContextBackgroundSet(pContext, ClrWhite);
GrRectFill(pContext, &fullscreen_clip);
// draw table title
GrContextForegroundSet(pContext, ClrWhite);
GrContextBackgroundSet(pContext, ClrBlack);
const tRectangle rect = {0, 27, 255, 41};
GrRectFill(pContext, &rect);
// draw the title bar
GrContextFontSet(pContext, &g_sFontGothic18b);
sprintf(buf, "%s %d", toMonthName(month, 1), year);
GrStringDrawCentered(pContext, buf, -1, LCD_WIDTH / 2, 15, 0);
GrContextForegroundSet(pContext, ClrBlack);
GrContextBackgroundSet(pContext, ClrWhite);
GrContextFontSet(pContext, &g_sFontGothic18);
for(int i = 0; i < 7; i++)
{
GrStringDrawCentered( pContext, week_shortname[i], -1, i * 20 + 11, 35, 0);
// draw line in title bar
GrLineDrawV(pContext, i * 20, 28, 42);
}
GrContextFontSet(pContext, &g_sFontGothic18);
GrContextForegroundSet(pContext, ClrWhite);
GrContextBackgroundSet(pContext, ClrBlack);
// get the start point of this month
uint8_t weekday = rtc_getweekday(year, month, 1) - 1; // use 0 as index
uint8_t maxday = rtc_getmaxday(year, month);
uint8_t y = 50;
for(int day = 1; day <= maxday; day++)
{
sprintf(buf, "%d", day);
uint8_t today = now_year == year && now_month == month && now_day == day;
if (today)
{
const tRectangle rect = {weekday * 20 + 1, y - 7, 20 + weekday * 20 - 1, y + 7};
GrRectFill(pContext, &rect);
GrContextForegroundSet(pContext, ClrBlack);
GrContextBackgroundSet(pContext, ClrWhite);
}
GrStringDrawCentered( pContext, buf, -1, weekday * 20 + 11, y, 0);
if (today)
{
const tRectangle rect2 = {weekday * 20 + 16, y - 5, weekday * 20 + 17, y - 4};
GrRectFill(pContext, &rect2);
GrContextForegroundSet(pContext, ClrWhite);
GrContextBackgroundSet(pContext, ClrBlack);
}
if (weekday != 6)
GrLineDrawV(pContext, (weekday + 1 ) * 20, 42, y + 7);
weekday++;
if (weekday == 7)
{
GrLineDrawH(pContext, 0, LCD_WIDTH, y + 8);
weekday = 0;
y += 20;
}
}
GrLineDrawH(pContext, 0, weekday * 20, y + 8);
// draw the buttons
if (month == 1)
sprintf(buf, "%s %d", toMonthName(12, 0), year - 1);
else
sprintf(buf, "%s %d", toMonthName(month - 1, 0), year);
window_button(pContext, KEY_ENTER, buf);
if (month == 12)
sprintf(buf, "%s %d", toMonthName(1, 0), year + 1);
else
sprintf(buf, "%s %d", toMonthName(month + 1, 0), year);
window_button(pContext, KEY_DOWN, buf);
}
//*****************************************************************************
//
//! Draws a line.
//!
//! \param pContext is a pointer to the drawing context to use.
//! \param lX1 is the X coordinate of the start of the line.
//! \param lY1 is the Y coordinate of the start of the line.
//! \param lX2 is the X coordinate of the end of the line.
//! \param lY2 is the Y coordinate of the end of the line.
//!
//! This function draws a line, utilizing GrLineDrawH() and GrLineDrawV() to
//! draw the line as efficiently as possible. The line is clipped to the
//! clippping rectangle using the Cohen-Sutherland clipping algorithm, and then
//! scan converted using Bresenham's line drawing algorithm.
//!
//! \return None.
//
//*****************************************************************************
void
GrLineFill(const tContext *pContext, long lX1, long lY1, long lX2, long lY2, long width)
{
long lError, lDeltaX, lDeltaY, lYStep, bSteep;
long lWStart, lWEnd;
lWEnd = width/2;
lWStart = lWEnd - width;
//
// Check the arguments.
//
ASSERT(pContext);
GrCircleFill(pContext, lX1, lY1, width/2);
GrCircleFill(pContext, lX2, lY2, width/2);
//
// See if this is a vertical line.
//
if(lX1 == lX2)
{
//
// It is more efficient to avoid Bresenham's algorithm when drawing a
// vertical line, so use the vertical line routine to draw this line.
//
for(long i = lWStart; i <= lWEnd; i++)
GrLineDrawV(pContext, lX1 + i, lY1, lY2);
//
// The line has ben drawn, so return.
//
return;
}
//
// See if this is a horizontal line.
//
if(lY1 == lY2)
{
//
// It is more efficient to avoid Bresenham's algorithm when drawing a
// horizontal line, so use the horizontal line routien to draw this
// line.
//
for(long i = lWStart; i <= lWEnd; i++)
GrLineDrawH(pContext, lX1, lX2, lY1+i);
//
// The line has ben drawn, so return.
//
return;
}
//
// Clip this line if necessary, and return without drawing anything if the
// line does not cross the clipping region.
//
if(GrLineClip(pContext, &lX1, &lY1, &lX2, &lY2) == 0)
{
return;
}
//
// Determine if the line is steep. A steep line has more motion in the Y
// direction than the X direction.
//
if(((lY2 > lY1) ? (lY2 - lY1) : (lY1 - lY2)) >
((lX2 > lX1) ? (lX2 - lX1) : (lX1 - lX2)))
{
bSteep = 1;
}
else
{
bSteep = 0;
}
//
// If the line is steep, then swap the X and Y coordinates.
//
if(bSteep)
{
lError = lX1;
lX1 = lY1;
lY1 = lError;
lError = lX2;
lX2 = lY2;
lY2 = lError;
}
//
// If the starting X coordinate is larger than the ending X coordinate,
// then swap the start and end coordinates.
//
if(lX1 > lX2)
{
lError = lX1;
lX1 = lX2;
lX2 = lError;
lError = lY1;
lY1 = lY2;
lY2 = lError;
}
//
// Compute the difference between the start and end coordinates in each
// axis.
//
lDeltaX = lX2 - lX1;
lDeltaY = (lY2 > lY1) ? (lY2 - lY1) : (lY1 - lY2);
//
// Initialize the error term to negative half the X delta.
//
lError = -lDeltaX / 2;
//
// Determine the direction to step in the Y axis when required.
//
if(lY1 < lY2)
{
lYStep = 1;
}
else
{
lYStep = -1;
}
//
// Loop through all the points along the X axis of the line.
//
for(; lX1 <= lX2; lX1++)
{
//
// See if this is a steep line.
//
if(bSteep)
{
//
// Plot this point of the line, swapping the X and Y coordinates.
//
//DpyPixelDraw(pContext->pDisplay, lY1, lX1, pContext->ulForeground);
GrLineDrawH(pContext, lY1 + lWStart, lY1 + lWEnd, lX1);
}
else
{
//
// Plot this point of the line, using the coordinates as is.
//
//DpyPixelDraw(pContext->pDisplay, lX1, lY1, pContext->ulForeground);
GrLineDrawV(pContext, lX1, lY1 + lWStart, lY1 + lWEnd);
}
//
// Increment the error term by the Y delta.
//
lError += lDeltaY;
//
// See if the error term is now greater than zero.
//
if(lError > 0)
{
//
// Take a step in the Y axis.
//
lY1 += lYStep;
//
// Decrement the error term by the X delta.
//
lError -= lDeltaX;
}
}
}