// clip is in screen coordinates
void ShaderProgram::clip(const FloatRect& clip)
{
if (clip == m_clipRect)
return;
// we should only call glScissor in this function, so that we can easily
// track the current clipping rect.
IntRect screenClip(clip.x(),
clip.y(),
clip.width(), clip.height());
if (!m_screenClip.isEmpty())
screenClip.intersect(m_screenClip);
screenClip.setY(screenClip.y() + m_viewRect.y());
if (screenClip.x() < 0) {
int w = screenClip.width();
w += screenClip.x();
screenClip.setX(0);
screenClip.setWidth(w);
}
if (screenClip.y() < 0) {
int h = screenClip.height();
h += screenClip.y();
screenClip.setY(0);
screenClip.setHeight(h);
}
glScissor(screenClip.x(), screenClip.y(), screenClip.width(), screenClip.height());
m_clipRect = clip;
}
void ShaderProgram::setScreenClip(const IntRect& clip)
{
m_screenClip = clip;
IntRect mclip = clip;
// the clip from frameworks is in full screen coordinates
mclip.setY(clip.y() - m_webViewRect.y() - m_titleBarHeight);
FloatRect tclip = convertInvScreenCoordToScreenCoord(mclip);
IntRect screenClip(tclip.x(), tclip.y(), tclip.width(), tclip.height());
m_screenClip = screenClip;
}
// clip is in screen coordinates
void ShaderProgram::clip(const FloatRect& clip)
{
if (clip == m_clipRect)
return;
ALOGV("--clipping rect %f %f, %f x %f",
clip.x(), clip.y(), clip.width(), clip.height());
// we should only call glScissor in this function, so that we can easily
// track the current clipping rect.
IntRect screenClip(clip.x(),
clip.y(),
clip.width(), clip.height());
if (!m_invViewClip.isEmpty())
screenClip.intersect(m_invViewClip);
// The previous intersection calculation is using local screen coordinates.
// Now we need to convert things from local screen coordinates to global
// screen coordinates and pass to the GL functions.
screenClip.setX(screenClip.x() + m_invScreenRect.x());
screenClip.setY(screenClip.y() + m_invScreenRect.y());
if (screenClip.x() < 0) {
int w = screenClip.width();
w += screenClip.x();
screenClip.setX(0);
screenClip.setWidth(w);
}
if (screenClip.y() < 0) {
int h = screenClip.height();
h += screenClip.y();
screenClip.setY(0);
screenClip.setHeight(h);
}
glScissor(screenClip.x(), screenClip.y(), screenClip.width(), screenClip.height());
m_clipRect = clip;
}