WebTransformationMatrix WebTransformOperations::apply() const
{
WebTransformationMatrix toReturn;
for (size_t i = 0; i < m_private->operations.size(); ++i)
toReturn.multiply(m_private->operations[i].matrix);
return toReturn;
}
WebTransformationMatrix WebTransformOperations::blend(const WebTransformOperations& from, double progress) const
{
WebTransformationMatrix toReturn;
bool fromIdentity = from.isIdentity();
bool toIdentity = isIdentity();
if (fromIdentity && toIdentity)
return toReturn;
if (matchesTypes(from)) {
size_t numOperations = max(fromIdentity ? 0 : from.m_private->operations.size(),
toIdentity ? 0 : m_private->operations.size());
for (size_t i = 0; i < numOperations; ++i) {
WebTransformationMatrix blended = blendTransformOperations(
fromIdentity ? 0 : &from.m_private->operations[i],
toIdentity ? 0 : &m_private->operations[i],
progress);
toReturn.multiply(blended);
}
} else {
toReturn = apply();
WebTransformationMatrix fromTransform = from.apply();
toReturn.blend(fromTransform, progress);
}
return toReturn;
}
WebTransformationMatrix CCLayerImpl::quadTransform() const
{
WebTransformationMatrix quadTransformation = drawTransform();
float offsetX = -0.5 * bounds().width();
float offsetY = -0.5 * bounds().height();
quadTransformation.translate(offsetX, offsetY);
return quadTransformation;
}
void CCLayerTreeHost::updateLayers(LayerChromium* rootLayer, CCTextureUpdater& updater)
{
TRACE_EVENT("CCLayerTreeHost::updateLayers", this, 0);
if (!rootLayer->renderSurface())
rootLayer->createRenderSurface();
rootLayer->renderSurface()->setContentRect(IntRect(IntPoint(0, 0), deviceViewportSize()));
IntRect rootClipRect(IntPoint(), deviceViewportSize());
rootLayer->setClipRect(rootClipRect);
LayerList updateList;
updateList.append(rootLayer);
RenderSurfaceChromium* rootRenderSurface = rootLayer->renderSurface();
rootRenderSurface->clearLayerList();
{
TRACE_EVENT("CCLayerTreeHost::updateLayers::calcDrawEtc", this, 0);
WebTransformationMatrix identityMatrix;
WebTransformationMatrix deviceScaleTransform;
deviceScaleTransform.scale(m_deviceScaleFactor);
CCLayerTreeHostCommon::calculateDrawTransforms(rootLayer, rootLayer, deviceScaleTransform, identityMatrix, updateList, rootRenderSurface->layerList(), layerRendererCapabilities().maxTextureSize);
FloatRect rootScissorRect(FloatPoint(0, 0), viewportSize());
CCLayerTreeHostCommon::calculateVisibleAndScissorRects(updateList, rootScissorRect);
}
// Reset partial texture update requests.
m_partialTextureUpdateRequests = 0;
reserveTextures(updateList);
paintLayerContents(updateList, PaintVisible, updater);
if (!m_triggerIdlePaints)
return;
size_t preferredLimitBytes = m_contentsTextureManager->preferredMemoryLimitBytes();
size_t maxLimitBytes = m_contentsTextureManager->maxMemoryLimitBytes();
m_contentsTextureManager->reduceMemoryToLimit(preferredLimitBytes);
if (m_contentsTextureManager->currentMemoryUseBytes() >= preferredLimitBytes)
return;
// Idle painting should fail when we hit the preferred memory limit,
// otherwise it will always push us towards the maximum limit.
m_contentsTextureManager->setMaxMemoryLimitBytes(preferredLimitBytes);
// The second (idle) paint will be a no-op in layers where painting already occured above.
paintLayerContents(updateList, PaintIdle, updater);
m_contentsTextureManager->setMaxMemoryLimitBytes(maxLimitBytes);
for (size_t i = 0; i < updateList.size(); ++i)
updateList[i]->clearRenderSurface();
}
static WebTransformationMatrix windowMatrix(int x, int y, int width, int height)
{
WebTransformationMatrix canvas;
// Map to window position and scale up to pixel coordinates.
canvas.translate3d(x, y, 0);
canvas.scale3d(width, height, 0);
// Map from ([-1, -1] to [1, 1]) -> ([0, 0] to [1, 1])
canvas.translate3d(0.5, 0.5, 0.5);
canvas.scale3d(0.5, 0.5, 0.5);
return canvas;
}
void CCDamageTracker::extendDamageForLayer(CCLayerImpl* layer, FloatRect& targetDamageRect)
{
// There are two ways that a layer can damage a region of the target surface:
// 1. Property change (e.g. opacity, position, transforms):
// - the entire region of the layer itself damages the surface.
// - the old layer region also damages the surface, because this region is now exposed.
// - note that in many cases the old and new layer rects may overlap, which is fine.
//
// 2. Repaint/update: If a region of the layer that was repainted/updated, that
// region damages the surface.
//
// Property changes take priority over update rects.
//
// This method is called when we want to consider how a layer contributes to its
// targetRenderSurface, even if that layer owns the targetRenderSurface itself.
// To consider how a layer's targetSurface contributes to the ancestorSurface,
// extendDamageForRenderSurface() must be called instead.
// Compute the layer's "originTransform" by translating the drawTransform.
WebTransformationMatrix originTransform = layer->drawTransform();
originTransform.translate(-0.5 * layer->bounds().width(), -0.5 * layer->bounds().height());
bool layerIsNew = false;
FloatRect oldLayerRect = removeRectFromCurrentFrame(layer->id(), layerIsNew);
FloatRect layerRectInTargetSpace = CCMathUtil::mapClippedRect(originTransform, FloatRect(FloatPoint::zero(), layer->bounds()));
saveRectForNextFrame(layer->id(), layerRectInTargetSpace);
if (layerIsNew || layerNeedsToRedrawOntoItsTargetSurface(layer)) {
// If a layer is new or has changed, then its entire layer rect affects the target surface.
targetDamageRect.uniteIfNonZero(layerRectInTargetSpace);
// The layer's old region is now exposed on the target surface, too.
// Note oldLayerRect is already in target space.
targetDamageRect.uniteIfNonZero(oldLayerRect);
} else if (!layer->updateRect().isEmpty()) {
// If the layer properties havent changed, then the the target surface is only
// affected by the layer's update area, which could be empty.
FloatRect updateRectInTargetSpace = CCMathUtil::mapClippedRect(originTransform, layer->updateRect());
targetDamageRect.uniteIfNonZero(updateRectInTargetSpace);
}
}
void CCLayerTreeHost::updateLayers(LayerChromium* rootLayer, CCTextureUpdater& updater)
{
TRACE_EVENT0("cc", "CCLayerTreeHost::updateLayers");
if (!rootLayer->renderSurface())
rootLayer->createRenderSurface();
rootLayer->renderSurface()->setContentRect(IntRect(IntPoint(0, 0), deviceViewportSize()));
IntRect rootClipRect(IntPoint(), deviceViewportSize());
rootLayer->setClipRect(rootClipRect);
LayerList updateList;
updateList.append(rootLayer);
RenderSurfaceChromium* rootRenderSurface = rootLayer->renderSurface();
rootRenderSurface->clearLayerList();
{
TRACE_EVENT0("cc", "CCLayerTreeHost::updateLayers::calcDrawEtc");
WebTransformationMatrix identityMatrix;
WebTransformationMatrix deviceScaleTransform;
deviceScaleTransform.scale(m_deviceScaleFactor);
CCLayerTreeHostCommon::calculateDrawTransforms(rootLayer, rootLayer, deviceScaleTransform, identityMatrix, updateList, rootRenderSurface->layerList(), layerRendererCapabilities().maxTextureSize);
FloatRect rootScissorRect(FloatPoint(0, 0), viewportSize());
CCLayerTreeHostCommon::calculateVisibleAndScissorRects(updateList, rootScissorRect);
}
// Reset partial texture update requests.
m_partialTextureUpdateRequests = 0;
prioritizeTextures(updateList);
bool needMoreUpdates = paintLayerContents(updateList, updater);
if (m_triggerIdleUpdates && needMoreUpdates)
setNeedsCommit();
for (size_t i = 0; i < updateList.size(); ++i)
updateList[i]->clearRenderSurface();
}
static WebTransformationMatrix orthoProjectionMatrix(float left, float right, float bottom, float top)
{
// Use the standard formula to map the clipping frustum to the cube from
// [-1, -1, -1] to [1, 1, 1].
float deltaX = right - left;
float deltaY = top - bottom;
WebTransformationMatrix proj;
if (!deltaX || !deltaY)
return proj;
proj.setM11(2.0f / deltaX);
proj.setM41(-(right + left) / deltaX);
proj.setM22(2.0f / deltaY);
proj.setM42(-(top + bottom) / deltaY);
// Z component of vertices is always set to zero as we don't use the depth buffer
// while drawing.
proj.setM33(0);
return proj;
}
bool isIdentity() const { return matrix.isIdentity(); }
static WebTransformationMatrix blendTransformOperations(const WebTransformOperation* from, const WebTransformOperation* to, double progress)
{
WebTransformationMatrix toReturn;
if (isIdentity(from) && isIdentity(to))
return toReturn;
WebTransformOperation::Type interpolationType = WebTransformOperation::WebTransformOperationIdentity;
if (isIdentity(to))
interpolationType = from->type;
else
interpolationType = to->type;
switch (interpolationType) {
case WebTransformOperation::WebTransformOperationTranslate: {
double fromX = isIdentity(from) ? 0 : from->translate.x;
double fromY = isIdentity(from) ? 0 : from->translate.y;
double fromZ = isIdentity(from) ? 0 : from->translate.z;
double toX = isIdentity(to) ? 0 : to->translate.x;
double toY = isIdentity(to) ? 0 : to->translate.y;
double toZ = isIdentity(to) ? 0 : to->translate.z;
toReturn.translate3d(blendDoubles(fromX, toX, progress),
blendDoubles(fromY, toY, progress),
blendDoubles(fromZ, toZ, progress));
break;
}
case WebTransformOperation::WebTransformOperationRotate: {
double axisX = 0;
double axisY = 0;
double axisZ = 1;
double fromAngle = 0;
double toAngle = isIdentity(to) ? 0 : to->rotate.angle;
if (shareSameAxis(from, to, axisX, axisY, axisZ, fromAngle))
toReturn.rotate3d(axisX, axisY, axisZ, blendDoubles(fromAngle, toAngle, progress));
else {
WebTransformationMatrix toMatrix;
if (!isIdentity(to))
toMatrix = to->matrix;
WebTransformationMatrix fromMatrix;
if (!isIdentity(from))
fromMatrix = from->matrix;
toReturn = toMatrix;
toReturn.blend(fromMatrix, progress);
}
break;
}
case WebTransformOperation::WebTransformOperationScale: {
double fromX = isIdentity(from) ? 1 : from->scale.x;
double fromY = isIdentity(from) ? 1 : from->scale.y;
double fromZ = isIdentity(from) ? 1 : from->scale.z;
double toX = isIdentity(to) ? 1 : to->scale.x;
double toY = isIdentity(to) ? 1 : to->scale.y;
double toZ = isIdentity(to) ? 1 : to->scale.z;
toReturn.scale3d(blendDoubles(fromX, toX, progress),
blendDoubles(fromY, toY, progress),
blendDoubles(fromZ, toZ, progress));
break;
}
case WebTransformOperation::WebTransformOperationSkew: {
double fromX = isIdentity(from) ? 0 : from->skew.x;
double fromY = isIdentity(from) ? 0 : from->skew.y;
double toX = isIdentity(to) ? 0 : to->skew.x;
double toY = isIdentity(to) ? 0 : to->skew.y;
toReturn.skewX(blendDoubles(fromX, toX, progress));
toReturn.skewY(blendDoubles(fromY, toY, progress));
break;
}
case WebTransformOperation::WebTransformOperationPerspective: {
double fromPerspectiveDepth = isIdentity(from) ? numeric_limits<double>::max() : from->perspectiveDepth;
double toPerspectiveDepth = isIdentity(to) ? numeric_limits<double>::max() : to->perspectiveDepth;
toReturn.applyPerspective(blendDoubles(fromPerspectiveDepth, toPerspectiveDepth, progress));
break;
}
case WebTransformOperation::WebTransformOperationMatrix: {
WebTransformationMatrix toMatrix;
if (!isIdentity(to))
toMatrix = to->matrix;
WebTransformationMatrix fromMatrix;
if (!isIdentity(from))
fromMatrix = from->matrix;
toReturn = toMatrix;
toReturn.blend(fromMatrix, progress);
break;
}
case WebTransformOperation::WebTransformOperationIdentity:
// Do nothing.
break;
}
return toReturn;
}
WebTransformationMatrix WebTransformationMatrix::operator*(const WebTransformationMatrix& t) const
{
WebTransformationMatrix result = *this;
result.multiply(t);
return result;
}
static void expectTranslateX(double translateX, const WebTransformationMatrix& matrix)
{
EXPECT_FLOAT_EQ(translateX, matrix.m41());
}