// Computes area of quads that are possibly non-rectangular. Can be easily extended to polygons.
static inline float quadArea(const FloatQuad& quad)
{
return fabs(0.5 * (wedgeProduct(quad.p1(), quad.p2()) +
wedgeProduct(quad.p2(), quad.p3()) +
wedgeProduct(quad.p3(), quad.p4()) +
wedgeProduct(quad.p4(), quad.p1())));
}
void PopupContainer::showInRect(const FloatQuad& controlPosition, const IntSize& controlSize, FrameView* v, int index)
{
// The controlSize is the size of the select box. It's usually larger than
// we need. Subtract border size so that usually the container will be
// displayed exactly the same width as the select box.
listBox()->setBaseWidth(max(controlSize.width() - borderSize * 2, 0));
listBox()->updateFromElement();
// We set the selected item in updateFromElement(), and disregard the
// index passed into this function (same as Webkit's PopupMenuWin.cpp)
// FIXME: make sure this is correct, and add an assertion.
// ASSERT(popupWindow(popup)->listBox()->selectedIndex() == index);
// Save and convert the controlPosition to main window coords. Each point is converted separately
// to window coordinates because the control could be in a transformed webview and then each point
// would be transformed by a different delta.
m_controlPosition.setP1(v->contentsToWindow(IntPoint(controlPosition.p1().x(), controlPosition.p1().y())));
m_controlPosition.setP2(v->contentsToWindow(IntPoint(controlPosition.p2().x(), controlPosition.p2().y())));
m_controlPosition.setP3(v->contentsToWindow(IntPoint(controlPosition.p3().x(), controlPosition.p3().y())));
m_controlPosition.setP4(v->contentsToWindow(IntPoint(controlPosition.p4().x(), controlPosition.p4().y())));
m_controlSize = controlSize;
// Position at (0, 0) since the frameRect().location() is relative to the
// parent WebWidget.
setFrameRect(IntRect(IntPoint(), controlSize));
showPopup(v);
}
void PrintTo(const FloatQuad& quad, std::ostream* os)
{
ScopedFloatFlags scope(*os);
*os << "FloatQuad("
<< "(" << quad.p1().x() << ", " << quad.p1().y() << "), "
<< "(" << quad.p2().x() << ", " << quad.p2().y() << "), "
<< "(" << quad.p3().x() << ", " << quad.p3().y() << "), "
<< "(" << quad.p4().x() << ", " << quad.p4().y() << "))";
}
CCLayerQuad::CCLayerQuad(const FloatQuad& quad)
{
// Create edges.
m_left = Edge(quad.p4(), quad.p1());
m_right = Edge(quad.p2(), quad.p3());
m_top = Edge(quad.p1(), quad.p2());
m_bottom = Edge(quad.p3(), quad.p4());
float sign = quad.isCounterclockwise() ? -1 : 1;
m_left.scale(sign);
m_right.scale(sign);
m_top.scale(sign);
m_bottom.scale(sign);
}
static void convertTargetSpaceQuadToCompositedLayer(const FloatQuad& targetSpaceQuad, LayoutObject* targetRenderer, const LayoutBoxModelObject* paintInvalidationContainer, FloatQuad& compositedSpaceQuad)
{
ASSERT(targetRenderer);
ASSERT(paintInvalidationContainer);
for (unsigned i = 0; i < 4; ++i) {
IntPoint point;
switch (i) {
case 0: point = roundedIntPoint(targetSpaceQuad.p1()); break;
case 1: point = roundedIntPoint(targetSpaceQuad.p2()); break;
case 2: point = roundedIntPoint(targetSpaceQuad.p3()); break;
case 3: point = roundedIntPoint(targetSpaceQuad.p4()); break;
}
// FIXME: this does not need to be absolute, just in the paint invalidation container's space.
point = targetRenderer->frame()->view()->contentsToRootFrame(point);
point = paintInvalidationContainer->frame()->view()->rootFrameToContents(point);
FloatPoint floatPoint = paintInvalidationContainer->absoluteToLocal(point, UseTransforms);
DeprecatedPaintLayer::mapPointToPaintBackingCoordinates(paintInvalidationContainer, floatPoint);
switch (i) {
case 0: compositedSpaceQuad.setP1(floatPoint); break;
case 1: compositedSpaceQuad.setP2(floatPoint); break;
case 2: compositedSpaceQuad.setP3(floatPoint); break;
case 3: compositedSpaceQuad.setP4(floatPoint); break;
}
}
}
void LayerRendererChromium::drawTexturedQuad(const TransformationMatrix& drawMatrix,
float width, float height, float opacity, const FloatQuad& quad,
int matrixLocation, int alphaLocation, int quadLocation)
{
static float glMatrix[16];
TransformationMatrix renderMatrix = drawMatrix;
// Apply a scaling factor to size the quad from 1x1 to its intended size.
renderMatrix.scale3d(width, height, 1);
// Apply the projection matrix before sending the transform over to the shader.
toGLMatrix(&glMatrix[0], m_projectionMatrix * renderMatrix);
GLC(m_context, m_context->uniformMatrix4fv(matrixLocation, false, &glMatrix[0], 1));
if (quadLocation != -1) {
float point[8];
point[0] = quad.p1().x();
point[1] = quad.p1().y();
point[2] = quad.p2().x();
point[3] = quad.p2().y();
point[4] = quad.p3().x();
point[5] = quad.p3().y();
point[6] = quad.p4().x();
point[7] = quad.p4().y();
GLC(m_context, m_context->uniform2fv(quadLocation, point, 4));
}
if (alphaLocation != -1)
GLC(m_context, m_context->uniform1f(alphaLocation, opacity));
GLC(m_context, m_context->drawElements(GraphicsContext3D::TRIANGLES, 6, GraphicsContext3D::UNSIGNED_SHORT, 0));
}
static void convertTargetSpaceQuadToCompositedLayer(const FloatQuad& targetSpaceQuad, RenderObject* targetRenderer, RenderObject* compositedRenderer, FloatQuad& compositedSpaceQuad)
{
ASSERT(targetRenderer);
ASSERT(compositedRenderer);
for (unsigned i = 0; i < 4; ++i) {
IntPoint point;
switch (i) {
case 0: point = roundedIntPoint(targetSpaceQuad.p1()); break;
case 1: point = roundedIntPoint(targetSpaceQuad.p2()); break;
case 2: point = roundedIntPoint(targetSpaceQuad.p3()); break;
case 3: point = roundedIntPoint(targetSpaceQuad.p4()); break;
}
point = targetRenderer->frame()->view()->contentsToWindow(point);
point = compositedRenderer->frame()->view()->windowToContents(point);
FloatPoint floatPoint = compositedRenderer->absoluteToLocal(point, UseTransforms);
switch (i) {
case 0: compositedSpaceQuad.setP1(floatPoint); break;
case 1: compositedSpaceQuad.setP2(floatPoint); break;
case 2: compositedSpaceQuad.setP3(floatPoint); break;
case 3: compositedSpaceQuad.setP4(floatPoint); break;
}
}
}
FloatQuad TransformationMatrix::projectQuad(const FloatQuad& q) const
{
FloatQuad projectedQuad;
projectedQuad.setP1(projectPoint(q.p1()));
projectedQuad.setP2(projectPoint(q.p2()));
projectedQuad.setP3(projectPoint(q.p3()));
projectedQuad.setP4(projectPoint(q.p4()));
return projectedQuad;
}
static void addQuadToPath(const FloatQuad& quad, Path& path)
{
// FIXME: Make this create rounded quad-paths, just like the axis-aligned case.
path.moveTo(quad.p1());
path.addLineTo(quad.p2());
path.addLineTo(quad.p3());
path.addLineTo(quad.p4());
path.closeSubpath();
}
static PassRefPtr<InspectorArray> buildArrayForQuad(const FloatQuad& quad)
{
RefPtr<InspectorArray> array = InspectorArray::create();
array->pushObject(buildObjectForPoint(quad.p1()));
array->pushObject(buildObjectForPoint(quad.p2()));
array->pushObject(buildObjectForPoint(quad.p3()));
array->pushObject(buildObjectForPoint(quad.p4()));
return array.release();
}
void InspectorTimelineAgent::localToPageQuad(const RenderObject& renderer, const LayoutRect& rect, FloatQuad* quad)
{
const FrameView& frameView = renderer.view().frameView();
FloatQuad absolute = renderer.localToAbsoluteQuad(FloatQuad(rect));
quad->setP1(frameView.contentsToRootView(roundedIntPoint(absolute.p1())));
quad->setP2(frameView.contentsToRootView(roundedIntPoint(absolute.p2())));
quad->setP3(frameView.contentsToRootView(roundedIntPoint(absolute.p3())));
quad->setP4(frameView.contentsToRootView(roundedIntPoint(absolute.p4())));
}
static Path quadToPath(const FloatQuad& quad)
{
Path quadPath;
quadPath.moveTo(quad.p1());
quadPath.addLineTo(quad.p2());
quadPath.addLineTo(quad.p3());
quadPath.addLineTo(quad.p4());
quadPath.closeSubpath();
return quadPath;
}
static void localToPageQuad(const RenderObject& renderer, const LayoutRect& rect, FloatQuad* quad)
{
LocalFrame* frame = renderer.frame();
FrameView* view = frame->view();
FloatQuad absolute = renderer.localToAbsoluteQuad(FloatQuad(rect));
quad->setP1(view->contentsToRootView(roundedIntPoint(absolute.p1())));
quad->setP2(view->contentsToRootView(roundedIntPoint(absolute.p2())));
quad->setP3(view->contentsToRootView(roundedIntPoint(absolute.p3())));
quad->setP4(view->contentsToRootView(roundedIntPoint(absolute.p4())));
}
static void contentsQuadToCoordinateSystem(const FrameView* mainView, const FrameView* view, FloatQuad& quad, InspectorOverlay::CoordinateSystem coordinateSystem)
{
quad.setP1(view->contentsToRootView(roundedIntPoint(quad.p1())));
quad.setP2(view->contentsToRootView(roundedIntPoint(quad.p2())));
quad.setP3(view->contentsToRootView(roundedIntPoint(quad.p3())));
quad.setP4(view->contentsToRootView(roundedIntPoint(quad.p4())));
if (coordinateSystem == InspectorOverlay::CoordinateSystem::View)
quad += mainView->scrollOffset();
}
void LayerRendererChromium::drawLayer(CCLayerImpl* layer, RenderSurfaceChromium* targetSurface)
{
if (layer->renderSurface() && layer->renderSurface() != targetSurface) {
layer->renderSurface()->draw(layer->getDrawRect());
return;
}
if (!layer->drawsContent())
return;
if (layer->bounds().isEmpty()) {
layer->unreserveContentsTexture();
return;
}
setScissorToRect(layer->scissorRect());
IntRect targetSurfaceRect = m_currentRenderSurface ? m_currentRenderSurface->contentRect() : m_defaultRenderSurface->contentRect();
IntRect scissorRect = layer->scissorRect();
if (!scissorRect.isEmpty())
targetSurfaceRect.intersect(scissorRect);
// Check if the layer falls within the visible bounds of the page.
IntRect layerRect = layer->getDrawRect();
bool isLayerVisible = targetSurfaceRect.intersects(layerRect);
if (!isLayerVisible) {
layer->unreserveContentsTexture();
return;
}
// FIXME: Need to take into account the commulative render surface transforms all the way from
// the default render surface in order to determine visibility.
TransformationMatrix combinedDrawMatrix = (layer->targetRenderSurface() ? layer->targetRenderSurface()->drawTransform().multiply(layer->drawTransform()) : layer->drawTransform());
if (!layer->doubleSided()) {
FloatRect layerRect(FloatPoint(0, 0), FloatSize(layer->bounds()));
FloatQuad mappedLayer = combinedDrawMatrix.mapQuad(FloatQuad(layerRect));
FloatSize horizontalDir = mappedLayer.p2() - mappedLayer.p1();
FloatSize verticalDir = mappedLayer.p4() - mappedLayer.p1();
FloatPoint3D xAxis(horizontalDir.width(), horizontalDir.height(), 0);
FloatPoint3D yAxis(verticalDir.width(), verticalDir.height(), 0);
FloatPoint3D zAxis = xAxis.cross(yAxis);
if (zAxis.z() < 0) {
layer->unreserveContentsTexture();
return;
}
}
layer->draw(targetSurfaceRect);
// Draw the debug border if there is one.
layer->drawDebugBorder();
}
static Ref<InspectorArray> createQuad(const FloatQuad& quad)
{
Ref<InspectorArray> array = InspectorArray::create();
array->pushDouble(quad.p1().x());
array->pushDouble(quad.p1().y());
array->pushDouble(quad.p2().x());
array->pushDouble(quad.p2().y());
array->pushDouble(quad.p3().x());
array->pushDouble(quad.p3().y());
array->pushDouble(quad.p4().x());
array->pushDouble(quad.p4().y());
return WTF::move(array);
}
static PassRefPtr<InspectorArray> createQuad(const FloatQuad& quad)
{
RefPtr<InspectorArray> array = InspectorArray::create();
array->pushDouble(quad.p1().x());
array->pushDouble(quad.p1().y());
array->pushDouble(quad.p2().x());
array->pushDouble(quad.p2().y());
array->pushDouble(quad.p3().x());
array->pushDouble(quad.p3().y());
array->pushDouble(quad.p4().x());
array->pushDouble(quad.p4().y());
return array.release();
}
static PassRefPtr<JSONArray> createQuad(const FloatQuad& quad)
{
RefPtr<JSONArray> array = JSONArray::create();
array->pushNumber(quad.p1().x());
array->pushNumber(quad.p1().y());
array->pushNumber(quad.p2().x());
array->pushNumber(quad.p2().y());
array->pushNumber(quad.p3().x());
array->pushNumber(quad.p3().y());
array->pushNumber(quad.p4().x());
array->pushNumber(quad.p4().y());
return array.release();
}
void LayerRendererChromium::drawLayer(CCLayerImpl* layer, CCRenderSurface* targetSurface)
{
if (layer->renderSurface() && layer->renderSurface() != targetSurface) {
layer->renderSurface()->draw(this, layer->getDrawRect());
layer->renderSurface()->releaseContentsTexture();
return;
}
if (!layer->drawsContent())
return;
if (!layer->opacity())
return;
if (layer->bounds().isEmpty())
return;
IntRect targetSurfaceRect = layer->targetRenderSurface() ? layer->targetRenderSurface()->contentRect() : m_defaultRenderSurface->contentRect();
if (layer->usesLayerScissor()) {
IntRect scissorRect = layer->scissorRect();
targetSurfaceRect.intersect(scissorRect);
if (targetSurfaceRect.isEmpty())
return;
setScissorToRect(scissorRect);
} else
GLC(m_context.get(), m_context->disable(GraphicsContext3D::SCISSOR_TEST));
IntRect visibleLayerRect = CCLayerTreeHostCommon::calculateVisibleLayerRect(targetSurfaceRect, layer->bounds(), layer->contentBounds(), layer->drawTransform());
visibleLayerRect.move(toSize(layer->scrollPosition()));
layer->setVisibleLayerRect(visibleLayerRect);
// The layer should not be drawn if (1) it is not double-sided and (2) the back of the layer is facing the screen.
// This second condition is checked by computing the transformed normal of the layer.
if (!layer->doubleSided()) {
FloatRect layerRect(FloatPoint(0, 0), FloatSize(layer->bounds()));
FloatQuad mappedLayer = layer->screenSpaceTransform().mapQuad(FloatQuad(layerRect));
FloatSize horizontalDir = mappedLayer.p2() - mappedLayer.p1();
FloatSize verticalDir = mappedLayer.p4() - mappedLayer.p1();
FloatPoint3D xAxis(horizontalDir.width(), horizontalDir.height(), 0);
FloatPoint3D yAxis(verticalDir.width(), verticalDir.height(), 0);
FloatPoint3D zAxis = xAxis.cross(yAxis);
if (zAxis.z() < 0)
return;
}
layer->draw(this);
// Draw the debug border if there is one.
layer->drawDebugBorder(this);
}
FloatQuad AffineTransform::mapQuad(const FloatQuad& q) const
{
if (isIdentityOrTranslation()) {
FloatQuad mappedQuad(q);
mappedQuad.move(narrowPrecisionToFloat(m_transform[4]), narrowPrecisionToFloat(m_transform[5]));
return mappedQuad;
}
FloatQuad result;
result.setP1(mapPoint(q.p1()));
result.setP2(mapPoint(q.p2()));
result.setP3(mapPoint(q.p3()));
result.setP4(mapPoint(q.p4()));
return result;
}
static FloatQuad projectQuad(const TransformationMatrix& transform, const FloatQuad& q, bool& clamped)
{
FloatQuad projectedQuad;
bool clampedPoint;
projectedQuad.setP1(transform.projectPoint(q.p1(), &clampedPoint));
clamped = clampedPoint;
projectedQuad.setP2(transform.projectPoint(q.p2(), &clampedPoint));
clamped |= clampedPoint;
projectedQuad.setP3(transform.projectPoint(q.p3(), &clampedPoint));
clamped |= clampedPoint;
projectedQuad.setP4(transform.projectPoint(q.p4(), &clampedPoint));
clamped |= clampedPoint;
return projectedQuad;
}
FloatQuad TransformationMatrix::mapQuad(const FloatQuad& q) const
{
if (isIdentityOrTranslation()) {
FloatQuad mappedQuad(q);
mappedQuad.move(static_cast<float>(m_matrix[3][0]), static_cast<float>(m_matrix[3][1]));
return mappedQuad;
}
FloatQuad result;
result.setP1(mapPoint(q.p1()));
result.setP2(mapPoint(q.p2()));
result.setP3(mapPoint(q.p3()));
result.setP4(mapPoint(q.p4()));
return result;
}
bool snapTo(const SubtargetGeometry& geom, const IntPoint& touchPoint, const IntRect& touchArea, IntPoint& adjustedPoint)
{
FrameView* view = geom.node()->document()->view();
FloatQuad quad = geom.quad();
if (quad.isRectilinear()) {
IntRect contentBounds = geom.boundingBox();
// Convert from frame coordinates to window coordinates.
IntRect bounds = view->contentsToWindow(contentBounds);
if (bounds.contains(touchPoint)) {
adjustedPoint = touchPoint;
return true;
}
if (bounds.intersects(touchArea)) {
bounds.intersect(touchArea);
adjustedPoint = bounds.center();
return true;
}
return false;
}
// The following code tries to adjust the point to place inside a both the touchArea and the non-rectilinear quad.
// FIXME: This will return the point inside the touch area that is the closest to the quad center, but does not
// guarantee that the point will be inside the quad. Corner-cases exist where the quad will intersect but this
// will fail to adjust the point to somewhere in the intersection.
// Convert quad from content to window coordinates.
FloatPoint p1 = contentsToWindow(view, quad.p1());
FloatPoint p2 = contentsToWindow(view, quad.p2());
FloatPoint p3 = contentsToWindow(view, quad.p3());
FloatPoint p4 = contentsToWindow(view, quad.p4());
quad = FloatQuad(p1, p2, p3, p4);
if (quad.containsPoint(touchPoint)) {
adjustedPoint = touchPoint;
return true;
}
// Pull point towards the center of the element.
FloatPoint center = quad.center();
adjustPointToRect(center, touchArea);
adjustedPoint = roundedIntPoint(center);
return quad.containsPoint(adjustedPoint);
}
// Note that we only handle convex quads here.
bool FloatQuad::containsQuad(const FloatQuad& other) const
{
return containsPoint(other.p1()) && containsPoint(other.p2()) && containsPoint(other.p3()) && containsPoint(other.p4());
}
