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optimize scissor clipping

This commit is contained in:
CaiWenzhi 2014-01-20 13:38:13 +08:00
parent a3f9a636e2
commit f10e1ee04c
2 changed files with 70 additions and 61 deletions
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130
cocos/gui/UILayout.cpp
View File

@ -67,6 +67,7 @@ _scissorRectDirty(false),
_clippingRect(Rect::ZERO),
_clippingParent(nullptr),
_doLayoutDirty(true),
_clippingRectDirty(true),
_currentStencilEnabled(GL_FALSE),
_currentStencilWriteMask(~0),
_currentStencilFunc(GL_ALWAYS),
@ -95,6 +96,8 @@ void Layout::onEnter()
{
_clippingStencil->onEnter();
}
_doLayoutDirty = true;
_clippingRectDirty = true;
}
void Layout::onExit()
@ -421,79 +424,83 @@ void Layout::setStencilClippingSize(const Size &size)
const Rect& Layout::getClippingRect()
{
Point worldPos = convertToWorldSpace(Point::ZERO);
AffineTransform t = getNodeToWorldAffineTransform();
float scissorWidth = _size.width*t.a;
float scissorHeight = _size.height*t.d;
Rect parentClippingRect;
Layout* parent = this;
bool firstClippingParentFounded = false;
while (parent)
if (_clippingRectDirty)
{
parent = dynamic_cast<Layout*>(parent->getParent());
if(parent)
Point worldPos = convertToWorldSpace(Point::ZERO);
AffineTransform t = getNodeToWorldAffineTransform();
float scissorWidth = _size.width*t.a;
float scissorHeight = _size.height*t.d;
Rect parentClippingRect;
Layout* parent = this;
bool firstClippingParentFounded = false;
while (parent)
{
if (parent->isClippingEnabled())
parent = dynamic_cast<Layout*>(parent->getParent());
if(parent)
{
if (!firstClippingParentFounded)
if (parent->isClippingEnabled())
{
_clippingParent = parent;
firstClippingParentFounded = true;
break;
if (!firstClippingParentFounded)
{
_clippingParent = parent;
firstClippingParentFounded = true;
break;
}
}
}
}
}
if (_clippingParent)
{
parentClippingRect = _clippingParent->getClippingRect();
float finalX = worldPos.x - (scissorWidth * _anchorPoint.x);
float finalY = worldPos.y - (scissorHeight * _anchorPoint.y);
float finalWidth = scissorWidth;
float finalHeight = scissorHeight;
float leftOffset = worldPos.x - parentClippingRect.origin.x;
if (leftOffset < 0.0f)
if (_clippingParent)
{
finalX = parentClippingRect.origin.x;
finalWidth += leftOffset;
parentClippingRect = _clippingParent->getClippingRect();
float finalX = worldPos.x - (scissorWidth * _anchorPoint.x);
float finalY = worldPos.y - (scissorHeight * _anchorPoint.y);
float finalWidth = scissorWidth;
float finalHeight = scissorHeight;
float leftOffset = worldPos.x - parentClippingRect.origin.x;
if (leftOffset < 0.0f)
{
finalX = parentClippingRect.origin.x;
finalWidth += leftOffset;
}
float rightOffset = (worldPos.x + scissorWidth) - (parentClippingRect.origin.x + parentClippingRect.size.width);
if (rightOffset > 0.0f)
{
finalWidth -= rightOffset;
}
float topOffset = (worldPos.y + scissorHeight) - (parentClippingRect.origin.y + parentClippingRect.size.height);
if (topOffset > 0.0f)
{
finalHeight -= topOffset;
}
float bottomOffset = worldPos.y - parentClippingRect.origin.y;
if (bottomOffset < 0.0f)
{
finalY = parentClippingRect.origin.x;
finalHeight += bottomOffset;
}
if (finalWidth < 0.0f)
{
finalWidth = 0.0f;
}
if (finalHeight < 0.0f)
{
finalHeight = 0.0f;
}
_clippingRect.origin.x = finalX;
_clippingRect.origin.y = finalY;
_clippingRect.size.width = finalWidth;
_clippingRect.size.height = finalHeight;
}
float rightOffset = (worldPos.x + scissorWidth) - (parentClippingRect.origin.x + parentClippingRect.size.width);
if (rightOffset > 0.0f)
else
{
finalWidth -= rightOffset;
_clippingRect.origin.x = worldPos.x - (scissorWidth * _anchorPoint.x);
_clippingRect.origin.y = worldPos.y - (scissorHeight * _anchorPoint.y);
_clippingRect.size.width = scissorWidth;
_clippingRect.size.height = scissorHeight;
}
float topOffset = (worldPos.y + scissorHeight) - (parentClippingRect.origin.y + parentClippingRect.size.height);
if (topOffset > 0.0f)
{
finalHeight -= topOffset;
}
float bottomOffset = worldPos.y - parentClippingRect.origin.y;
if (bottomOffset < 0.0f)
{
finalY = parentClippingRect.origin.x;
finalHeight += bottomOffset;
}
if (finalWidth < 0.0f)
{
finalWidth = 0.0f;
}
if (finalHeight < 0.0f)
{
finalHeight = 0.0f;
}
_clippingRect.origin.x = finalX;
_clippingRect.origin.y = finalY;
_clippingRect.size.width = finalWidth;
_clippingRect.size.height = finalHeight;
}
else
{
_clippingRect.origin.x = worldPos.x - (scissorWidth * _anchorPoint.x);
_clippingRect.origin.y = worldPos.y - (scissorHeight * _anchorPoint.y);
_clippingRect.size.width = scissorWidth;
_clippingRect.size.height = scissorHeight;
_clippingRectDirty = false;
}
return _clippingRect;
}
@ -504,6 +511,7 @@ void Layout::onSizeChanged()
setContentSize(_size);
setStencilClippingSize(_size);
_doLayoutDirty = true;
_clippingRectDirty = true;
if (_backGroundImage)
{
_backGroundImage->setPosition(Point(_size.width/2.0f, _size.height/2.0f));

1
cocos/gui/UILayout.h
View File

@ -273,6 +273,7 @@ protected:
Rect _clippingRect;
Layout* _clippingParent;
bool _doLayoutDirty;
bool _clippingRectDirty;
//clipping