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Bug 1227231: Use generic tree traversal algorithms for loops over Layer trees. r=botond

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Create an Iterator type with classes ForwardIterator and ReverseIterator,
having GetFirstChild/GetNextSibling and GetLastChild/GetPrevSibling
methods, respectively. Specify the iterator type for each call to
ForEachNode. With this, we can support trees with forward and reverse
sibling structures.

Additionally, apply these algorithms to all Layer recursive traversals,
where applicable. Update tests to ensure both directions yield expected
results.

MozReview-Commit-ID: iYpX22XHTa
This commit is contained in:
Kevin Wern
2016-03-10 01:20:40 -08:00
parent e71269370e
commit 4d07bc92ea
12 changed files with 1442 additions and 890 deletions
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48
gfx/layers/RenderTrace.cpp
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@@ -8,13 +8,12 @@
// If rendertrace is off let's no compile this code
#ifdef MOZ_RENDERTRACE
#include "Layers.h"
#include "TreeTraversal.h" // for ForEachNode
namespace mozilla {
namespace layers {
static int colorId = 0;
static gfx::Matrix4x4 GetRootTransform(Layer *aLayer) {
gfx::Matrix4x4 layerTrans = aLayer->GetTransform();
layerTrans.ProjectTo2D();
@@ -24,32 +23,27 @@ static gfx::Matrix4x4 GetRootTransform(Layer *aLayer) {
return layerTrans;
}
void RenderTraceLayers(Layer *aLayer, const char *aColor, const gfx::Matrix4x4 aRootTransform, bool aReset) {
if (!aLayer)
return;
void RenderTraceLayers(Layer *aLayer, const char *aColor, const gfx::Matrix4x4 aRootTransform) {
int colorId = 0;
ForEachNode<ForwardIterator>(
aLayer,
[&colorId] (Layer *layer)
{
gfx::Matrix4x4 trans = aRootTransform * layer->GetTransform();
trans.ProjectTo2D();
gfx::IntRect clipRect = layer->GetLocalVisibleRegion().GetBounds();
Rect rect(clipRect.x, clipRect.y, clipRect.width, clipRect.height);
trans.TransformBounds(rect);
gfx::Matrix4x4 trans = aRootTransform * aLayer->GetTransform();
trans.ProjectTo2D();
gfx::IntRect clipRect = aLayer->GetLocalVisibleRegion().GetBounds();
Rect rect(clipRect.x, clipRect.y, clipRect.width, clipRect.height);
trans.TransformBounds(rect);
if (strcmp(aLayer->Name(), "ContainerLayer") != 0 &&
strcmp(aLayer->Name(), "ContainerLayerComposite") != 0) {
printf_stderr("%s RENDERTRACE %u rect #%02X%s %i %i %i %i\n",
aLayer->Name(), (int)PR_IntervalNow(),
colorId, aColor,
(int)rect.x, (int)rect.y, (int)rect.width, (int)rect.height);
}
colorId++;
for (Layer* child = aLayer->GetFirstChild();
child; child = child->GetNextSibling()) {
RenderTraceLayers(child, aColor, aRootTransform, false);
}
if (aReset) colorId = 0;
if (strcmp(layer->Name(), "ContainerLayer") != 0 &&
strcmp(layer->Name(), "ContainerLayerComposite") != 0) {
printf_stderr("%s RENDERTRACE %u rect #%02X%s %i %i %i %i\n",
layer->Name(), (int)PR_IntervalNow(),
colorId, aColor,
(int)rect.x, (int)rect.y, (int)rect.width, (int)rect.height);
}
colorId++;
});
}
void RenderTraceInvalidateStart(Layer *aLayer, const char *aColor, const gfx::IntRect aRect) {