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gecko-dev/gfx/layers/basic/BasicCompositor.cpp

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/* -*- Mode: C++; tab-width: 20; 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 "BasicCompositor.h"
#include "BasicLayersImpl.h" // for FillRectWithMask
#include "TextureHostBasic.h"
#include "mozilla/layers/Effects.h"
#include "mozilla/layers/YCbCrImageDataSerializer.h"
#include "nsIWidget.h"
#include "gfx2DGlue.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Helpers.h"
#include "gfxUtils.h"
#include "YCbCrUtils.h"
#include <algorithm>
#include "ImageContainer.h"
#include "gfxPrefs.h"
#ifdef MOZ_ENABLE_SKIA
#include "skia/include/core/SkCanvas.h" // for SkCanvas
#include "skia/include/core/SkBitmapDevice.h" // for SkBitmapDevice
#else
#define PIXMAN_DONT_DEFINE_STDINT
#include "pixman.h" // for pixman_f_transform, etc
#endif
namespace mozilla {
using namespace mozilla::gfx;
namespace layers {
class DataTextureSourceBasic : public DataTextureSource
, public TextureSourceBasic
{
public:
virtual TextureSourceBasic* AsSourceBasic() override { return this; }
virtual gfx::SourceSurface* GetSurface(DrawTarget* aTarget) override { return mSurface; }
SurfaceFormat GetFormat() const override
{
return mSurface->GetFormat();
}
virtual IntSize GetSize() const override
{
return mSurface->GetSize();
}
virtual bool Update(gfx::DataSourceSurface* aSurface,
nsIntRegion* aDestRegion = nullptr,
gfx::IntPoint* aSrcOffset = nullptr) override
{
mSurface = aSurface;
return true;
}
virtual void DeallocateDeviceData() override
{
mSurface = nullptr;
SetUpdateSerial(0);
}
public:
RefPtr<gfx::DataSourceSurface> mSurface;
};
BasicCompositor::BasicCompositor(nsIWidget *aWidget)
: mWidget(aWidget)
, mDidExternalComposition(false)
{
MOZ_COUNT_CTOR(BasicCompositor);
mMaxTextureSize =
Factory::GetMaxSurfaceSize(gfxPlatform::GetPlatform()->GetContentBackendFor(LayersBackend::LAYERS_BASIC));
}
BasicCompositor::~BasicCompositor()
{
MOZ_COUNT_DTOR(BasicCompositor);
}
bool
BasicCompositor::Initialize()
{
return mWidget ? mWidget->InitCompositor(this) : false;
};
int32_t
BasicCompositor::GetMaxTextureSize() const
{
return mMaxTextureSize;
}
void
BasicCompositingRenderTarget::BindRenderTarget()
{
if (mClearOnBind) {
mDrawTarget->ClearRect(Rect(0, 0, mSize.width, mSize.height));
mClearOnBind = false;
}
}
void BasicCompositor::Destroy()
{
mWidget->CleanupRemoteDrawing();
mWidget = nullptr;
}
TextureFactoryIdentifier
BasicCompositor::GetTextureFactoryIdentifier()
{
TextureFactoryIdentifier ident(LayersBackend::LAYERS_BASIC,
XRE_GetProcessType(),
GetMaxTextureSize());
// All composition ops are supported in software.
for (uint8_t op = 0; op < uint8_t(CompositionOp::OP_COUNT); op++) {
ident.mSupportedBlendModes += CompositionOp(op);
}
return ident;
}
already_AddRefed<CompositingRenderTarget>
BasicCompositor::CreateRenderTarget(const IntRect& aRect, SurfaceInitMode aInit)
{
MOZ_ASSERT(aRect.width != 0 && aRect.height != 0, "Trying to create a render target of invalid size");
if (aRect.width * aRect.height == 0) {
return nullptr;
}
RefPtr<DrawTarget> target = mDrawTarget->CreateSimilarDrawTarget(aRect.Size(), SurfaceFormat::B8G8R8A8);
if (!target) {
return nullptr;
}
RefPtr<BasicCompositingRenderTarget> rt = new BasicCompositingRenderTarget(target, aRect);
return rt.forget();
}
already_AddRefed<CompositingRenderTarget>
BasicCompositor::CreateRenderTargetFromSource(const IntRect &aRect,
const CompositingRenderTarget *aSource,
const IntPoint &aSourcePoint)
{
MOZ_CRASH("Shouldn't be called!");
return nullptr;
}
already_AddRefed<DataTextureSource>
BasicCompositor::CreateDataTextureSource(TextureFlags aFlags)
{
RefPtr<DataTextureSource> result = new DataTextureSourceBasic();
return result.forget();
}
bool
BasicCompositor::SupportsEffect(EffectTypes aEffect)
{
return aEffect != EffectTypes::YCBCR && aEffect != EffectTypes::COMPONENT_ALPHA;
}
static void
DrawSurfaceWithTextureCoords(DrawTarget *aDest,
const gfx::Rect& aDestRect,
SourceSurface *aSource,
const gfx::Rect& aTextureCoords,
gfx::Filter aFilter,
const DrawOptions& aOptions,
SourceSurface *aMask,
const Matrix* aMaskTransform)
{
// Convert aTextureCoords into aSource's coordinate space
gfxRect sourceRect(aTextureCoords.x * aSource->GetSize().width,
aTextureCoords.y * aSource->GetSize().height,
aTextureCoords.width * aSource->GetSize().width,
aTextureCoords.height * aSource->GetSize().height);
// Floating point error can accumulate above and we know our visible region
// is integer-aligned, so round it out.
sourceRect.Round();
// Compute a transform that maps sourceRect to aDestRect.
Matrix matrix =
gfxUtils::TransformRectToRect(sourceRect,
gfx::IntPoint(aDestRect.x, aDestRect.y),
gfx::IntPoint(aDestRect.XMost(), aDestRect.y),
gfx::IntPoint(aDestRect.XMost(), aDestRect.YMost()));
// Only use REPEAT if aTextureCoords is outside (0, 0, 1, 1).
gfx::Rect unitRect(0, 0, 1, 1);
ExtendMode mode = unitRect.Contains(aTextureCoords) ? ExtendMode::CLAMP : ExtendMode::REPEAT;
FillRectWithMask(aDest, aDestRect, aSource, aFilter, aOptions,
mode, aMask, aMaskTransform, &matrix);
}
#ifdef MOZ_ENABLE_SKIA
static SkMatrix
Matrix3DToSkia(const Matrix4x4& aMatrix)
{
SkMatrix transform;
transform.setAll(aMatrix._11,
aMatrix._21,
aMatrix._41,
aMatrix._12,
aMatrix._22,
aMatrix._42,
aMatrix._14,
aMatrix._24,
aMatrix._44);
return transform;
}
static void
Transform(DataSourceSurface* aDest,
DataSourceSurface* aSource,
const Matrix4x4& aTransform,
const Point& aDestOffset)
{
if (aTransform.IsSingular()) {
return;
}
IntSize destSize = aDest->GetSize();
SkImageInfo destInfo = SkImageInfo::Make(destSize.width,
destSize.height,
kBGRA_8888_SkColorType,
kPremul_SkAlphaType);
SkBitmap destBitmap;
destBitmap.setInfo(destInfo, aDest->Stride());
destBitmap.setPixels((uint32_t*)aDest->GetData());
SkCanvas destCanvas(destBitmap);
IntSize srcSize = aSource->GetSize();
SkImageInfo srcInfo = SkImageInfo::Make(srcSize.width,
srcSize.height,
kBGRA_8888_SkColorType,
kPremul_SkAlphaType);
SkBitmap src;
src.setInfo(srcInfo, aSource->Stride());
src.setPixels((uint32_t*)aSource->GetData());
Matrix4x4 transform = aTransform;
transform.PostTranslate(Point3D(-aDestOffset.x, -aDestOffset.y, 0));
destCanvas.setMatrix(Matrix3DToSkia(transform));
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
paint.setAntiAlias(true);
paint.setFilterLevel(SkPaint::kLow_FilterLevel);
SkRect destRect = SkRect::MakeXYWH(0, 0, srcSize.width, srcSize.height);
destCanvas.drawBitmapRectToRect(src, nullptr, destRect, &paint);
}
#else
static pixman_transform
Matrix3DToPixman(const Matrix4x4& aMatrix)
{
pixman_f_transform transform;
transform.m[0][0] = aMatrix._11;
transform.m[0][1] = aMatrix._21;
transform.m[0][2] = aMatrix._41;
transform.m[1][0] = aMatrix._12;
transform.m[1][1] = aMatrix._22;
transform.m[1][2] = aMatrix._42;
transform.m[2][0] = aMatrix._14;
transform.m[2][1] = aMatrix._24;
transform.m[2][2] = aMatrix._44;
pixman_transform result;
pixman_transform_from_pixman_f_transform(&result, &transform);
return result;
}
static void
Transform(DataSourceSurface* aDest,
DataSourceSurface* aSource,
const Matrix4x4& aTransform,
const Point& aDestOffset)
{
IntSize destSize = aDest->GetSize();
pixman_image_t* dest = pixman_image_create_bits(PIXMAN_a8r8g8b8,
destSize.width,
destSize.height,
(uint32_t*)aDest->GetData(),
aDest->Stride());
IntSize srcSize = aSource->GetSize();
pixman_image_t* src = pixman_image_create_bits(PIXMAN_a8r8g8b8,
srcSize.width,
srcSize.height,
(uint32_t*)aSource->GetData(),
aSource->Stride());
MOZ_ASSERT(src !=0 && dest != 0, "Failed to create pixman images?");
pixman_transform pixTransform = Matrix3DToPixman(aTransform);
pixman_transform pixTransformInverted;
// If the transform is singular then nothing would be drawn anyway, return here
if (!pixman_transform_invert(&pixTransformInverted, &pixTransform)) {
pixman_image_unref(dest);
pixman_image_unref(src);
return;
}
pixman_image_set_transform(src, &pixTransformInverted);
pixman_image_composite32(PIXMAN_OP_SRC,
src,
nullptr,
dest,
aDestOffset.x,
aDestOffset.y,
0,
0,
0,
0,
destSize.width,
destSize.height);
pixman_image_unref(dest);
pixman_image_unref(src);
}
#endif
static inline IntRect
RoundOut(Rect r)
{
r.RoundOut();
return IntRect(r.x, r.y, r.width, r.height);
}
void
BasicCompositor::DrawQuad(const gfx::Rect& aRect,
const gfx::Rect& aClipRect,
const EffectChain &aEffectChain,
gfx::Float aOpacity,
const gfx::Matrix4x4& aTransform,
const gfx::Rect& aVisibleRect)
{
RefPtr<DrawTarget> buffer = mRenderTarget->mDrawTarget;
// For 2D drawing, |dest| and |buffer| are the same surface. For 3D drawing,
// |dest| is a temporary surface.
RefPtr<DrawTarget> dest = buffer;
buffer->PushClipRect(aClipRect);
AutoRestoreTransform autoRestoreTransform(dest);
Matrix newTransform;
Rect transformBounds;
Matrix4x4 new3DTransform;
IntPoint offset = mRenderTarget->GetOrigin();
if (aTransform.Is2D()) {
newTransform = aTransform.As2D();
} else {
// Create a temporary surface for the transform.
dest = gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(RoundOut(aRect).Size(), SurfaceFormat::B8G8R8A8);
if (!dest) {
return;
}
dest->SetTransform(Matrix::Translation(-aRect.x, -aRect.y));
// Get the bounds post-transform.
transformBounds = aTransform.TransformAndClipBounds(aRect, Rect(offset.x, offset.y, buffer->GetSize().width, buffer->GetSize().height));
transformBounds.RoundOut();
// Propagate the coordinate offset to our 2D draw target.
newTransform = Matrix::Translation(transformBounds.x, transformBounds.y);
// When we apply the 3D transformation, we do it against a temporary
// surface, so undo the coordinate offset.
new3DTransform = Matrix4x4::Translation(aRect.x, aRect.y, 0) * aTransform;
}
newTransform.PostTranslate(-offset.x, -offset.y);
buffer->SetTransform(newTransform);
RefPtr<SourceSurface> sourceMask;
Matrix maskTransform;
if (aEffectChain.mSecondaryEffects[EffectTypes::MASK]) {
EffectMask *effectMask = static_cast<EffectMask*>(aEffectChain.mSecondaryEffects[EffectTypes::MASK].get());
sourceMask = effectMask->mMaskTexture->AsSourceBasic()->GetSurface(dest);
MOZ_ASSERT(effectMask->mMaskTransform.Is2D(), "How did we end up with a 3D transform here?!");
MOZ_ASSERT(!effectMask->mIs3D);
maskTransform = effectMask->mMaskTransform.As2D();
maskTransform.PreTranslate(-offset.x, -offset.y);
}
CompositionOp blendMode = CompositionOp::OP_OVER;
if (Effect* effect = aEffectChain.mSecondaryEffects[EffectTypes::BLEND_MODE].get()) {
blendMode = static_cast<EffectBlendMode*>(effect)->mBlendMode;
}
switch (aEffectChain.mPrimaryEffect->mType) {
case EffectTypes::SOLID_COLOR: {
EffectSolidColor* effectSolidColor =
static_cast<EffectSolidColor*>(aEffectChain.mPrimaryEffect.get());
FillRectWithMask(dest, aRect, effectSolidColor->mColor,
DrawOptions(aOpacity, blendMode), sourceMask, &maskTransform);
break;
}
case EffectTypes::RGB: {
TexturedEffect* texturedEffect =
static_cast<TexturedEffect*>(aEffectChain.mPrimaryEffect.get());
TextureSourceBasic* source = texturedEffect->mTexture->AsSourceBasic();
if (texturedEffect->mPremultiplied) {
DrawSurfaceWithTextureCoords(dest, aRect,
source->GetSurface(dest),
texturedEffect->mTextureCoords,
texturedEffect->mFilter,
DrawOptions(aOpacity, blendMode),
sourceMask, &maskTransform);
} else {
RefPtr<DataSourceSurface> srcData = source->GetSurface(dest)->GetDataSurface();
// Yes, we re-create the premultiplied data every time.
// This might be better with a cache, eventually.
RefPtr<DataSourceSurface> premultData = gfxUtils::CreatePremultipliedDataSurface(srcData);
DrawSurfaceWithTextureCoords(dest, aRect,
premultData,
texturedEffect->mTextureCoords,
texturedEffect->mFilter,
DrawOptions(aOpacity, blendMode),
sourceMask, &maskTransform);
}
break;
}
case EffectTypes::YCBCR: {
NS_RUNTIMEABORT("Can't (easily) support component alpha with BasicCompositor!");
break;
}
case EffectTypes::RENDER_TARGET: {
EffectRenderTarget* effectRenderTarget =
static_cast<EffectRenderTarget*>(aEffectChain.mPrimaryEffect.get());
RefPtr<BasicCompositingRenderTarget> surface
= static_cast<BasicCompositingRenderTarget*>(effectRenderTarget->mRenderTarget.get());
RefPtr<SourceSurface> sourceSurf = surface->mDrawTarget->Snapshot();
DrawSurfaceWithTextureCoords(dest, aRect,
sourceSurf,
effectRenderTarget->mTextureCoords,
effectRenderTarget->mFilter,
DrawOptions(aOpacity, blendMode),
sourceMask, &maskTransform);
break;
}
case EffectTypes::COMPONENT_ALPHA: {
NS_RUNTIMEABORT("Can't (easily) support component alpha with BasicCompositor!");
break;
}
default: {
NS_RUNTIMEABORT("Invalid effect type!");
break;
}
}
if (!aTransform.Is2D()) {
dest->Flush();
RefPtr<SourceSurface> snapshot = dest->Snapshot();
RefPtr<DataSourceSurface> source = snapshot->GetDataSurface();
RefPtr<DataSourceSurface> temp =
Factory::CreateDataSourceSurface(RoundOut(transformBounds).Size(), SurfaceFormat::B8G8R8A8
#ifdef MOZ_ENABLE_SKIA
, true
#endif
);
if (NS_WARN_IF(!temp)) {
buffer->PopClip();
return;
}
Transform(temp, source, new3DTransform, transformBounds.TopLeft());
transformBounds.MoveTo(0, 0);
buffer->DrawSurface(temp, transformBounds, transformBounds);
}
buffer->PopClip();
}
void
BasicCompositor::ClearRect(const gfx::Rect& aRect)
{
mRenderTarget->mDrawTarget->ClearRect(aRect);
}
void
BasicCompositor::BeginFrame(const nsIntRegion& aInvalidRegion,
const gfx::Rect *aClipRectIn,
const gfx::Rect& aRenderBounds,
gfx::Rect *aClipRectOut /* = nullptr */,
gfx::Rect *aRenderBoundsOut /* = nullptr */)
{
mWidgetSize = mWidget->GetClientSize().ToUnknownSize();
IntRect intRect = gfx::IntRect(IntPoint(), mWidgetSize);
Rect rect = Rect(0, 0, intRect.width, intRect.height);
nsIntRegion invalidRegionSafe;
if (mDidExternalComposition) {
// We do not know rendered region during external composition, just redraw
// whole widget.
invalidRegionSafe = intRect;
mDidExternalComposition = false;
} else {
// Sometimes the invalid region is larger than we want to draw.
invalidRegionSafe.And(aInvalidRegion, intRect);
}
IntRect invalidRect = invalidRegionSafe.GetBounds();
mInvalidRect = IntRect(invalidRect.x, invalidRect.y, invalidRect.width, invalidRect.height);
mInvalidRegion = invalidRegionSafe;
if (aRenderBoundsOut) {
*aRenderBoundsOut = Rect();
}
if (mInvalidRect.width <= 0 || mInvalidRect.height <= 0) {
return;
}
if (mTarget) {
// If we have a copy target, then we don't have a widget-provided mDrawTarget (currently). Use a dummy
// placeholder so that CreateRenderTarget() works.
mDrawTarget = gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
} else {
mDrawTarget = mWidget->StartRemoteDrawingInRegion(mInvalidRegion);
}
if (!mDrawTarget) {
return;
}
// Setup an intermediate render target to buffer all compositing. We will
// copy this into mDrawTarget (the widget), and/or mTarget in EndFrame()
RefPtr<CompositingRenderTarget> target = CreateRenderTarget(mInvalidRect, INIT_MODE_CLEAR);
if (!target) {
if (!mTarget) {
mWidget->EndRemoteDrawingInRegion(mDrawTarget, mInvalidRegion);
}
return;
}
SetRenderTarget(target);
// We only allocate a surface sized to the invalidated region, so we need to
// translate future coordinates.
mRenderTarget->mDrawTarget->SetTransform(Matrix::Translation(-invalidRect.x,
-invalidRect.y));
gfxUtils::ClipToRegion(mRenderTarget->mDrawTarget, invalidRegionSafe);
if (aRenderBoundsOut) {
*aRenderBoundsOut = rect;
}
if (aClipRectIn) {
mRenderTarget->mDrawTarget->PushClipRect(*aClipRectIn);
} else {
mRenderTarget->mDrawTarget->PushClipRect(rect);
if (aClipRectOut) {
*aClipRectOut = rect;
}
}
}
void
BasicCompositor::EndFrame()
{
// Pop aClipRectIn/bounds rect
mRenderTarget->mDrawTarget->PopClip();
if (gfxPrefs::WidgetUpdateFlashing()) {
float r = float(rand()) / RAND_MAX;
float g = float(rand()) / RAND_MAX;
float b = float(rand()) / RAND_MAX;
// We're still clipped to mInvalidRegion, so just fill the bounds.
mRenderTarget->mDrawTarget->FillRect(IntRectToRect(mInvalidRegion.GetBounds()),
ColorPattern(Color(r, g, b, 0.2f)));
}
// Pop aInvalidregion
mRenderTarget->mDrawTarget->PopClip();
// Note: Most platforms require us to buffer drawing to the widget surface.
// That's why we don't draw to mDrawTarget directly.
RefPtr<SourceSurface> source = mRenderTarget->mDrawTarget->Snapshot();
RefPtr<DrawTarget> dest(mTarget ? mTarget : mDrawTarget);
nsIntPoint offset = mTarget ? mTargetBounds.TopLeft() : nsIntPoint();
// The source DrawTarget is clipped to the invalidation region, so we have
// to copy the individual rectangles in the region or else we'll draw blank
// pixels.
nsIntRegionRectIterator iter(mInvalidRegion);
for (const IntRect *r = iter.Next(); r; r = iter.Next()) {
dest->CopySurface(source,
IntRect(r->x - mInvalidRect.x, r->y - mInvalidRect.y, r->width, r->height),
IntPoint(r->x - offset.x, r->y - offset.y));
}
if (!mTarget) {
mWidget->EndRemoteDrawingInRegion(mDrawTarget, mInvalidRegion);
}
mDrawTarget = nullptr;
mRenderTarget = nullptr;
}
void
BasicCompositor::EndFrameForExternalComposition(const gfx::Matrix& aTransform)
{
MOZ_ASSERT(!mTarget);
MOZ_ASSERT(!mDrawTarget);
MOZ_ASSERT(!mRenderTarget);
mDidExternalComposition = true;
}
} // namespace layers
} // namespace mozilla
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