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Fixed line drawing

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This commit is contained in:
dcone%netscape.com 2000-05-12 21:05:25 +00:00
parent ae29aa3494
commit e1630d1487
1 changed files with 17 additions and 12 deletions
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29
gfx/src/gtk/nsRenderingContextGTK.cpp
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@ -779,45 +779,50 @@ NS_IMETHODIMP nsRenderingContextGTK::DestroyDrawingSurface(nsDrawingSurface aDS)
NS_IMETHODIMP nsRenderingContextGTK::DrawLine(nscoord aX0, nscoord aY0, nscoord aX1, nscoord aY1)
{
nscoord diffX,diffY;
g_return_val_if_fail(mTranMatrix != NULL, NS_ERROR_FAILURE);
g_return_val_if_fail(mSurface != NULL, NS_ERROR_FAILURE);
mTranMatrix->TransformCoord(&aX0,&aY0);
mTranMatrix->TransformCoord(&aX1,&aY1);
if (aY0 != aY1) {
aY1--;
diffX = aX1-aX0;
diffY = aY1-aY0;
if (0!=diffX) {
diffX = (diffX>0?1:-1);
}
if (aX0 != aX1) {
aX1--;
if (0!=diffY) {
diffY = (diffY>0?1:-1);
}
UpdateGC();
::gdk_draw_line(mSurface->GetDrawable(),
mGC,
aX0, aY0, aX1, aY1);
aX0, aY0, aX1-diffX, aY1-diffY);
return NS_OK;
}
NS_IMETHODIMP nsRenderingContextGTK::DrawStdLine(nscoord aX0, nscoord aY0, nscoord aX1, nscoord aY1)
{
nscoord diffX,diffY;
g_return_val_if_fail(mTranMatrix != NULL, NS_ERROR_FAILURE);
g_return_val_if_fail(mSurface != NULL, NS_ERROR_FAILURE);
if (aY0 != aY1) {
aY1--;
if (0!=diffX) {
diffX = (diffX>0?1:-1);
}
if (aX0 != aX1) {
aX1--;
if (0!=diffY) {
diffY = (diffY>0?1:-1);
}
UpdateGC();
::gdk_draw_line(mSurface->GetDrawable(),
mGC,
aX0, aY0, aX1, aY1);
::gdk_draw_line(mSurface->GetDrawable(),mGC,aX0, aY0, aX1-diffX, aY1-diffY);
return NS_OK;
}