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pjs/gfx/layers/Layers.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at:
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Code.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Chris Jones <jones.chris.g@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifdef MOZ_IPC
# include "mozilla/layers/ShadowLayers.h"
#endif // MOZ_IPC
#include "ImageLayers.h"
#include "Layers.h"
#include "gfxPlatform.h"
using namespace mozilla::layers;
#ifdef MOZ_LAYERS_HAVE_LOG
FILE*
FILEOrDefault(FILE* aFile)
{
return aFile ? aFile : stderr;
}
#endif // MOZ_LAYERS_HAVE_LOG
namespace {
// XXX pretty general utilities, could centralize
nsACString&
AppendToString(nsACString& s, const gfxPattern::GraphicsFilter& f,
const char* pfx="", const char* sfx="")
{
s += pfx;
switch (f) {
case gfxPattern::FILTER_FAST: s += "fast"; break;
case gfxPattern::FILTER_GOOD: s += "good"; break;
case gfxPattern::FILTER_BEST: s += "best"; break;
case gfxPattern::FILTER_NEAREST: s += "nearest"; break;
case gfxPattern::FILTER_BILINEAR: s += "bilinear"; break;
case gfxPattern::FILTER_GAUSSIAN: s += "gaussian"; break;
default:
NS_ERROR("unknown filter type");
s += "???";
}
return s += sfx;
}
nsACString&
AppendToString(nsACString& s, const gfxRGBA& c,
const char* pfx="", const char* sfx="")
{
s += pfx;
s += nsPrintfCString(
128, "rgba(%d, %d, %d, %g)",
PRUint8(c.r*255.0), PRUint8(c.g*255.0), PRUint8(c.b*255.0), c.a);
return s += sfx;
}
nsACString&
AppendToString(nsACString& s, const gfx3DMatrix& m,
const char* pfx="", const char* sfx="")
{
s += pfx;
if (m.IsIdentity())
s += "[ I ]";
else {
gfxMatrix matrix;
if (m.Is2D(&matrix)) {
s += nsPrintfCString(
96, "[ %g %g; %g %g; %g %g; ]",
matrix.xx, matrix.yx, matrix.xy, matrix.yy, matrix.x0, matrix.y0);
} else {
s += nsPrintfCString(
256, "[ %g %g %g %g; %g %g %g %g; %g %g %g %g; %g %g %g %g; ]",
m._11, m._12, m._13, m._14,
m._21, m._22, m._23, m._24,
m._31, m._32, m._33, m._34,
m._41, m._42, m._43, m._44);
}
}
return s += sfx;
}
nsACString&
AppendToString(nsACString& s, const nsIntPoint& p,
const char* pfx="", const char* sfx="")
{
s += pfx;
s += nsPrintfCString(128, "(x=%d, y=%d)", p.x, p.y);
return s += sfx;
}
nsACString&
AppendToString(nsACString& s, const nsIntRect& r,
const char* pfx="", const char* sfx="")
{
s += pfx;
s += nsPrintfCString(
256, "(x=%d, y=%d, w=%d, h=%d)",
r.x, r.y, r.width, r.height);
return s += sfx;
}
nsACString&
AppendToString(nsACString& s, const nsIntRegion& r,
const char* pfx="", const char* sfx="")
{
s += pfx;
nsIntRegionRectIterator it(r);
s += "< ";
while (const nsIntRect* sr = it.Next())
AppendToString(s, *sr) += "; ";
s += ">";
return s += sfx;
}
nsACString&
AppendToString(nsACString& s, const nsIntSize& sz,
const char* pfx="", const char* sfx="")
{
s += pfx;
s += nsPrintfCString(128, "(w=%d, h=%d)", sz.width, sz.height);
return s += sfx;
}
nsACString&
AppendToString(nsACString& s, const FrameMetrics& m,
const char* pfx="", const char* sfx="")
{
s += pfx;
AppendToString(s, m.mViewportSize, "{ viewport=");
AppendToString(s, m.mViewportScrollOffset, " viewportScroll=");
AppendToString(s, m.mDisplayPort, " displayport=", " }");
return s += sfx;
}
} // namespace <anon>
namespace mozilla {
namespace layers {
//--------------------------------------------------
// LayerManager
already_AddRefed<gfxASurface>
LayerManager::CreateOptimalSurface(const gfxIntSize &aSize,
gfxASurface::gfxImageFormat aFormat)
{
return gfxPlatform::GetPlatform()->
CreateOffscreenSurface(aSize, gfxASurface::ContentFromFormat(aFormat));
}
//--------------------------------------------------
// Layer
PRBool
Layer::CanUseOpaqueSurface()
{
// If the visible content in the layer is opaque, there is no need
// for an alpha channel.
if (GetContentFlags() & CONTENT_OPAQUE)
return PR_TRUE;
// Also, if this layer is the bottommost layer in a container which
// doesn't need an alpha channel, we can use an opaque surface for this
// layer too. Any transparent areas must be covered by something else
// in the container.
ContainerLayer* parent = GetParent();
return parent && parent->GetFirstChild() == this &&
parent->CanUseOpaqueSurface();
}
#ifdef MOZ_IPC
// NB: eventually these methods will be defined unconditionally, and
// can be moved into Layers.h
const nsIntRect*
Layer::GetEffectiveClipRect()
{
if (ShadowLayer* shadow = AsShadowLayer()) {
return shadow->GetShadowClipRect();
}
return GetClipRect();
}
const nsIntRegion&
Layer::GetEffectiveVisibleRegion()
{
if (ShadowLayer* shadow = AsShadowLayer()) {
return shadow->GetShadowVisibleRegion();
}
return GetVisibleRegion();
}
#else
const nsIntRect* Layer::GetEffectiveClipRect() { return GetClipRect(); }
const nsIntRegion& Layer::GetEffectiveVisibleRegion() { return GetVisibleRegion(); }
#endif // MOZ_IPC
gfx3DMatrix
Layer::SnapTransform(const gfx3DMatrix& aTransform,
const gfxRect& aSnapRect,
gfxMatrix* aResidualTransform)
{
if (aResidualTransform) {
*aResidualTransform = gfxMatrix();
}
gfxMatrix matrix2D;
gfx3DMatrix result;
if (mManager->IsSnappingEffectiveTransforms() &&
aTransform.Is2D(&matrix2D) &&
matrix2D.HasNonIntegerTranslation() &&
!matrix2D.IsSingular() &&
!matrix2D.HasNonAxisAlignedTransform()) {
gfxMatrix snappedMatrix;
gfxPoint topLeft = matrix2D.Transform(aSnapRect.TopLeft());
topLeft.Round();
// first compute scale factors that scale aSnapRect to the snapped rect
if (aSnapRect.IsEmpty()) {
snappedMatrix.xx = matrix2D.xx;
snappedMatrix.yy = matrix2D.yy;
} else {
gfxPoint bottomRight = matrix2D.Transform(aSnapRect.BottomRight());
bottomRight.Round();
snappedMatrix.xx = (bottomRight.x - topLeft.x)/aSnapRect.Width();
snappedMatrix.yy = (bottomRight.y - topLeft.y)/aSnapRect.Height();
}
// compute translation factors that will move aSnapRect to the snapped rect
// given those scale factors
snappedMatrix.x0 = topLeft.x - aSnapRect.pos.x*snappedMatrix.xx;
snappedMatrix.y0 = topLeft.y - aSnapRect.pos.y*snappedMatrix.yy;
result = gfx3DMatrix::From2D(snappedMatrix);
if (aResidualTransform && !snappedMatrix.IsSingular()) {
// set aResidualTransform so that aResidual * snappedMatrix == matrix2D.
// (i.e., appying snappedMatrix after aResidualTransform gives the
// ideal transform.
gfxMatrix snappedMatrixInverse = snappedMatrix;
snappedMatrixInverse.Invert();
*aResidualTransform = matrix2D * snappedMatrixInverse;
}
} else {
result = aTransform;
}
return result;
}
const gfx3DMatrix&
Layer::GetLocalTransform()
{
#ifdef MOZ_IPC
if (ShadowLayer* shadow = AsShadowLayer())
return shadow->GetShadowTransform();
#endif
return mTransform;
}
float
Layer::GetEffectiveOpacity()
{
float opacity = GetOpacity();
for (ContainerLayer* c = GetParent(); c && !c->UseIntermediateSurface();
c = c->GetParent()) {
opacity *= c->GetOpacity();
}
return opacity;
}
PRBool
ContainerLayer::HasMultipleChildren()
{
PRUint32 count = 0;
for (Layer* child = GetFirstChild(); child; child = child->GetNextSibling()) {
const nsIntRect *clipRect = child->GetEffectiveClipRect();
if (clipRect && clipRect->IsEmpty())
continue;
if (child->GetVisibleRegion().IsEmpty())
continue;
++count;
if (count > 1)
return PR_TRUE;
}
return PR_FALSE;
}
void
ContainerLayer::DefaultComputeEffectiveTransforms(const gfx3DMatrix& aTransformToSurface)
{
gfxMatrix residual;
gfx3DMatrix idealTransform = GetLocalTransform()*aTransformToSurface;
mEffectiveTransform = SnapTransform(idealTransform, gfxRect(0, 0, 0, 0), &residual);
PRBool useIntermediateSurface;
float opacity = GetEffectiveOpacity();
if (opacity != 1.0f && HasMultipleChildren()) {
useIntermediateSurface = PR_TRUE;
} else {
useIntermediateSurface = PR_FALSE;
if (!mEffectiveTransform.IsIdentity()) {
for (Layer* child = GetFirstChild(); child; child = child->GetNextSibling()) {
const nsIntRect *clipRect = child->GetEffectiveClipRect();
/* We can't (easily) forward our transform to children with a non-empty clip
* rect since it would need to be adjusted for the transform.
* TODO: This is easily solvable for translation/scaling transforms.
*/
if (clipRect && !clipRect->IsEmpty() && !child->GetVisibleRegion().IsEmpty()) {
useIntermediateSurface = PR_TRUE;
break;
}
}
}
}
mUseIntermediateSurface = useIntermediateSurface;
if (useIntermediateSurface) {
ComputeEffectiveTransformsForChildren(gfx3DMatrix::From2D(residual));
} else {
ComputeEffectiveTransformsForChildren(idealTransform);
}
}
void
ContainerLayer::ComputeEffectiveTransformsForChildren(const gfx3DMatrix& aTransformToSurface)
{
for (Layer* l = mFirstChild; l; l = l->GetNextSibling()) {
l->ComputeEffectiveTransforms(aTransformToSurface);
}
}
#ifdef MOZ_LAYERS_HAVE_LOG
static nsACString& PrintInfo(nsACString& aTo, ShadowLayer* aShadowLayer);
void
Layer::Dump(FILE* aFile, const char* aPrefix)
{
DumpSelf(aFile, aPrefix);
if (Layer* kid = GetFirstChild()) {
nsCAutoString pfx(aPrefix);
pfx += " ";
kid->Dump(aFile, pfx.get());
}
if (Layer* next = GetNextSibling())
next->Dump(aFile, aPrefix);
}
void
Layer::DumpSelf(FILE* aFile, const char* aPrefix)
{
nsCAutoString str;
PrintInfo(str, aPrefix);
fprintf(FILEOrDefault(aFile), "%s\n", str.get());
}
void
Layer::Log(const char* aPrefix)
{
if (!IsLogEnabled())
return;
LogSelf(aPrefix);
if (Layer* kid = GetFirstChild()) {
nsCAutoString pfx(aPrefix);
pfx += " ";
kid->Log(pfx.get());
}
if (Layer* next = GetNextSibling())
next->Log(aPrefix);
}
void
Layer::LogSelf(const char* aPrefix)
{
if (!IsLogEnabled())
return;
nsCAutoString str;
PrintInfo(str, aPrefix);
MOZ_LAYERS_LOG(("%s", str.get()));
}
nsACString&
Layer::PrintInfo(nsACString& aTo, const char* aPrefix)
{
aTo += aPrefix;
aTo += nsPrintfCString(64, "%s%s (0x%p)", mManager->Name(), Name(), this);
::PrintInfo(aTo, AsShadowLayer());
if (mUseClipRect) {
AppendToString(aTo, mClipRect, " [clip=", "]");
}
if (!mTransform.IsIdentity()) {
AppendToString(aTo, mTransform, " [transform=", "]");
}
if (!mVisibleRegion.IsEmpty()) {
AppendToString(aTo, mVisibleRegion, " [visible=", "]");
}
if (1.0 != mOpacity) {
aTo.AppendPrintf(" [opacity=%g]", mOpacity);
}
if (GetContentFlags() & CONTENT_OPAQUE) {
aTo += " [opaqueContent]";
}
if (GetContentFlags() & CONTENT_NO_TEXT) {
aTo += " [noText]";
}
if (GetContentFlags() & CONTENT_NO_TEXT_OVER_TRANSPARENT) {
aTo += " [noTextOverTransparent]";
}
return aTo;
}
nsACString&
ThebesLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{
Layer::PrintInfo(aTo, aPrefix);
if (!mValidRegion.IsEmpty()) {
AppendToString(aTo, mValidRegion, " [valid=", "]");
}
if (mXResolution != 1.0 || mYResolution != 1.0) {
aTo.AppendPrintf(" [xres=%g yres=%g]", mXResolution, mYResolution);
}
return aTo;
}
nsACString&
ContainerLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{
Layer::PrintInfo(aTo, aPrefix);
return mFrameMetrics.IsDefault() ?
aTo : AppendToString(aTo, mFrameMetrics, " [metrics=", "]");
}
nsACString&
ColorLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{
Layer::PrintInfo(aTo, aPrefix);
AppendToString(aTo, mColor, " [color=", "]");
return aTo;
}
nsACString&
CanvasLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{
Layer::PrintInfo(aTo, aPrefix);
if (mFilter != gfxPattern::FILTER_GOOD) {
AppendToString(aTo, mFilter, " [filter=", "]");
}
return aTo;
}
nsACString&
ImageLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{
Layer::PrintInfo(aTo, aPrefix);
if (mFilter != gfxPattern::FILTER_GOOD) {
AppendToString(aTo, mFilter, " [filter=", "]");
}
return aTo;
}
//--------------------------------------------------
// LayerManager
void
LayerManager::Dump(FILE* aFile, const char* aPrefix)
{
FILE* file = FILEOrDefault(aFile);
DumpSelf(file, aPrefix);
nsCAutoString pfx(aPrefix);
pfx += " ";
if (!GetRoot()) {
fprintf(file, "%s(null)", pfx.get());
return;
}
GetRoot()->Dump(file, pfx.get());
}
void
LayerManager::DumpSelf(FILE* aFile, const char* aPrefix)
{
nsCAutoString str;
PrintInfo(str, aPrefix);
fprintf(FILEOrDefault(aFile), "%s\n", str.get());
}
void
LayerManager::Log(const char* aPrefix)
{
if (!IsLogEnabled())
return;
LogSelf(aPrefix);
nsCAutoString pfx(aPrefix);
pfx += " ";
if (!GetRoot()) {
MOZ_LAYERS_LOG(("%s(null)", pfx.get()));
return;
}
GetRoot()->Log(pfx.get());
}
void
LayerManager::LogSelf(const char* aPrefix)
{
nsCAutoString str;
PrintInfo(str, aPrefix);
MOZ_LAYERS_LOG(("%s", str.get()));
}
nsACString&
LayerManager::PrintInfo(nsACString& aTo, const char* aPrefix)
{
aTo += aPrefix;
return aTo += nsPrintfCString(64, "%sLayerManager (0x%p)", Name(), this);
}
/*static*/ void
LayerManager::InitLog()
{
if (!sLog)
sLog = PR_NewLogModule("Layers");
}
/*static*/ bool
LayerManager::IsLogEnabled()
{
NS_ABORT_IF_FALSE(!!sLog,
"layer manager must be created before logging is allowed");
return PR_LOG_TEST(sLog, PR_LOG_DEBUG);
}
# ifdef MOZ_IPC
static nsACString&
PrintInfo(nsACString& aTo, ShadowLayer* aShadowLayer)
{
if (!aShadowLayer) {
return aTo;
}
if (const nsIntRect* clipRect = aShadowLayer->GetShadowClipRect()) {
AppendToString(aTo, *clipRect, " [shadow-clip=", "]");
}
if (!aShadowLayer->GetShadowTransform().IsIdentity()) {
AppendToString(aTo, aShadowLayer->GetShadowTransform(), " [shadow-transform=", "]");
}
if (!aShadowLayer->GetShadowVisibleRegion().IsEmpty()) {
AppendToString(aTo, aShadowLayer->GetShadowVisibleRegion(), " [shadow-visible=", "]");
}
return aTo;
}
# else
static nsACString& PrintInfo(nsACString& aTo, ShadowLayer* aShadowLayer)
{
return aTo;
}
# endif // MOZ_IPC
#else // !MOZ_LAYERS_HAVE_LOG
void Layer::Dump(FILE* aFile, const char* aPrefix) {}
void Layer::DumpSelf(FILE* aFile, const char* aPrefix) {}
void Layer::Log(const char* aPrefix) {}
void Layer::LogSelf(const char* aPrefix) {}
nsACString&
Layer::PrintInfo(nsACString& aTo, const char* aPrefix)
{ return aTo; }
nsACString&
ThebesLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{ return aTo; }
nsACString&
ContainerLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{ return aTo; }
nsACString&
ColorLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{ return aTo; }
nsACString&
CanvasLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{ return aTo; }
nsACString&
ImageLayer::PrintInfo(nsACString& aTo, const char* aPrefix)
{ return aTo; }
void LayerManager::Dump(FILE* aFile, const char* aPrefix) {}
void LayerManager::DumpSelf(FILE* aFile, const char* aPrefix) {}
void LayerManager::Log(const char* aPrefix) {}
void LayerManager::LogSelf(const char* aPrefix) {}
nsACString&
LayerManager::PrintInfo(nsACString& aTo, const char* aPrefix)
{ return aTo; }
/*static*/ void LayerManager::InitLog() {}
/*static*/ bool LayerManager::IsLogEnabled() { return false; }
#endif // MOZ_LAYERS_HAVE_LOG
PRLogModuleInfo* LayerManager::sLog;
} // namespace layers
} // namespace mozilla
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