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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "BasicLayersImpl.h"
#include <new> // for operator new
#include "Layers.h" // for Layer, etc
#include "basic/BasicImplData.h" // for BasicImplData
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
#include "mozilla/DebugOnly.h" // for DebugOnly
#include "mozilla/layers/CompositorTypes.h"
#include "mozilla/layers/ISurfaceAllocator.h"
#include "AutoMaskData.h"
namespace mozilla {
namespace layers {
using namespace mozilla::gfx;
bool
GetMaskData(Layer* aMaskLayer,
const Point& aDeviceOffset,
AutoMoz2DMaskData* aMaskData)
{
if (aMaskLayer) {
RefPtr<SourceSurface> surface =
static_cast<BasicImplData*>(aMaskLayer->ImplData())->GetAsSourceSurface();
if (surface) {
Matrix transform;
Matrix4x4 effectiveTransform = aMaskLayer->GetEffectiveTransform();
DebugOnly<bool> maskIs2D = effectiveTransform.CanDraw2D(&transform);
NS_ASSERTION(maskIs2D, "How did we end up with a 3D transform here?!");
transform.PostTranslate(-aDeviceOffset.x, -aDeviceOffset.y);
aMaskData->Construct(transform, surface);
return true;
}
}
return false;
}
already_AddRefed<SourceSurface>
GetMaskForLayer(Layer* aLayer, Matrix* aMaskTransform)
{
if (!aLayer->GetMaskLayer()) {
return nullptr;
}
MOZ_ASSERT(aMaskTransform);
AutoMoz2DMaskData mask;
if (GetMaskData(aLayer->GetMaskLayer(), Point(), &mask)) {
*aMaskTransform = mask.GetTransform();
RefPtr<SourceSurface> surf = mask.GetSurface();
return surf.forget();
}
return nullptr;
}
void
PaintWithMask(gfxContext* aContext, float aOpacity, Layer* aMaskLayer)
{
AutoMoz2DMaskData mask;
if (GetMaskData(aMaskLayer, Point(), &mask)) {
aContext->SetMatrix(ThebesMatrix(mask.GetTransform()));
aContext->Mask(mask.GetSurface(), aOpacity);
return;
}
// if there is no mask, just paint normally
aContext->Paint(aOpacity);
}
void
FillRectWithMask(DrawTarget* aDT,
const Rect& aRect,
const Color& aColor,
const DrawOptions& aOptions,
SourceSurface* aMaskSource,
const Matrix* aMaskTransform)
{
if (aMaskSource && aMaskTransform) {
aDT->PushClipRect(aRect);
Matrix oldTransform = aDT->GetTransform();
aDT->SetTransform(*aMaskTransform);
aDT->MaskSurface(ColorPattern(aColor), aMaskSource, Point(), aOptions);
aDT->SetTransform(oldTransform);
aDT->PopClip();
return;
}
aDT->FillRect(aRect, ColorPattern(aColor), aOptions);
}
void
FillRectWithMask(DrawTarget* aDT,
const gfx::Point& aDeviceOffset,
const Rect& aRect,
const Color& aColor,
const DrawOptions& aOptions,
Layer* aMaskLayer)
{
AutoMoz2DMaskData mask;
if (GetMaskData(aMaskLayer, aDeviceOffset, &mask)) {
const Matrix& maskTransform = mask.GetTransform();
FillRectWithMask(aDT, aRect, aColor, aOptions, mask.GetSurface(), &maskTransform);
return;
}
FillRectWithMask(aDT, aRect, aColor, aOptions);
}
void
FillRectWithMask(DrawTarget* aDT,
const Rect& aRect,
SourceSurface* aSurface,
SamplingFilter aSamplingFilter,
const DrawOptions& aOptions,
ExtendMode aExtendMode,
SourceSurface* aMaskSource,
const Matrix* aMaskTransform,
const Matrix* aSurfaceTransform)
{
if (aMaskSource && aMaskTransform) {
aDT->PushClipRect(aRect);
Matrix oldTransform = aDT->GetTransform();
Matrix inverseMask = *aMaskTransform;
inverseMask.Invert();
Matrix transform = oldTransform * inverseMask;
if (aSurfaceTransform) {
transform = (*aSurfaceTransform) * transform;
}
SurfacePattern source(aSurface, aExtendMode, transform, aSamplingFilter);
aDT->SetTransform(*aMaskTransform);
aDT->MaskSurface(source, aMaskSource, Point(0, 0), aOptions);
aDT->SetTransform(oldTransform);
aDT->PopClip();
return;
}
aDT->FillRect(aRect,
SurfacePattern(aSurface, aExtendMode,
aSurfaceTransform ? (*aSurfaceTransform) : Matrix(),
aSamplingFilter), aOptions);
}
void
FillRectWithMask(DrawTarget* aDT,
const gfx::Point& aDeviceOffset,
const Rect& aRect,
SourceSurface* aSurface,
SamplingFilter aSamplingFilter,
const DrawOptions& aOptions,
Layer* aMaskLayer)
{
AutoMoz2DMaskData mask;
if (GetMaskData(aMaskLayer, aDeviceOffset, &mask)) {
const Matrix& maskTransform = mask.GetTransform();
FillRectWithMask(aDT, aRect, aSurface, aSamplingFilter, aOptions,
ExtendMode::CLAMP,
mask.GetSurface(), &maskTransform);
return;
}
FillRectWithMask(aDT, aRect, aSurface, aSamplingFilter, aOptions,
ExtendMode::CLAMP);
}
BasicImplData*
ToData(Layer* aLayer)
{
return static_cast<BasicImplData*>(aLayer->ImplData());
}
gfx::CompositionOp
GetEffectiveOperator(Layer* aLayer)
{
CompositionOp op = aLayer->GetEffectiveMixBlendMode();
if (op != CompositionOp::OP_OVER) {
return op;
}
return ToData(aLayer)->GetOperator();
}
ShadowableLayer*
ToShadowable(Layer* aLayer)
{
return aLayer->AsShadowableLayer();
}
bool
ShouldShadow(Layer* aLayer)
{
if (!ToShadowable(aLayer)) {
MOZ_ASSERT(aLayer->GetType() == Layer::TYPE_READBACK,
"Only expect not to shadow ReadbackLayers");
return false;
}
return true;
}
} // namespace layers
} // namespace mozilla
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