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gecko-dev/gfx/layers/RotatedBuffer.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 "RotatedBuffer.h"
#include <sys/types.h> // for int32_t
#include <algorithm> // for max
#include "BasicImplData.h" // for BasicImplData
#include "BasicLayersImpl.h" // for ToData
#include "BufferUnrotate.h" // for BufferUnrotate
#include "GeckoProfiler.h" // for PROFILER_LABEL
#include "Layers.h" // for PaintedLayer, Layer, etc
#include "gfxPlatform.h" // for gfxPlatform
#include "gfxPrefs.h" // for gfxPrefs
#include "gfxUtils.h" // for gfxUtils
#include "mozilla/ArrayUtils.h" // for ArrayLength
#include "mozilla/gfx/BasePoint.h" // for BasePoint
#include "mozilla/gfx/BaseRect.h" // for BaseRect
#include "mozilla/gfx/BaseSize.h" // for BaseSize
#include "mozilla/gfx/Matrix.h" // for Matrix
#include "mozilla/gfx/Point.h" // for Point, IntPoint
#include "mozilla/gfx/Rect.h" // for Rect, IntRect
#include "mozilla/gfx/Types.h" // for ExtendMode::ExtendMode::CLAMP, etc
#include "mozilla/layers/ShadowLayers.h" // for ShadowableLayer
#include "mozilla/layers/TextureClient.h" // for TextureClient
#include "mozilla/gfx/Point.h" // for IntSize
#include "gfx2DGlue.h"
#include "nsLayoutUtils.h" // for invalidation debugging
namespace mozilla {
using namespace gfx;
namespace layers {
IntRect
RotatedBuffer::GetQuadrantRectangle(XSide aXSide, YSide aYSide) const
{
// quadrantTranslation is the amount we translate the top-left
// of the quadrant by to get coordinates relative to the layer
IntPoint quadrantTranslation = -mBufferRotation;
quadrantTranslation.x += aXSide == LEFT ? mBufferRect.width : 0;
quadrantTranslation.y += aYSide == TOP ? mBufferRect.height : 0;
return mBufferRect + quadrantTranslation;
}
Rect
RotatedBuffer::GetSourceRectangle(XSide aXSide, YSide aYSide) const
{
Rect result;
if (aXSide == LEFT) {
result.x = 0;
result.width = mBufferRotation.x;
} else {
result.x = mBufferRotation.x;
result.width = mBufferRect.width - mBufferRotation.x;
}
if (aYSide == TOP) {
result.y = 0;
result.height = mBufferRotation.y;
} else {
result.y = mBufferRotation.y;
result.height = mBufferRect.height - mBufferRotation.y;
}
return result;
}
/**
* @param aXSide LEFT means we draw from the left side of the buffer (which
* is drawn on the right side of mBufferRect). RIGHT means we draw from
* the right side of the buffer (which is drawn on the left side of
* mBufferRect).
* @param aYSide TOP means we draw from the top side of the buffer (which
* is drawn on the bottom side of mBufferRect). BOTTOM means we draw from
* the bottom side of the buffer (which is drawn on the top side of
* mBufferRect).
*/
void
RotatedBuffer::DrawBufferQuadrant(gfx::DrawTarget* aTarget,
XSide aXSide, YSide aYSide,
ContextSource aSource,
float aOpacity,
gfx::CompositionOp aOperator,
gfx::SourceSurface* aMask,
const gfx::Matrix* aMaskTransform) const
{
// The rectangle that we're going to fill. Basically we're going to
// render the buffer at mBufferRect + quadrantTranslation to get the
// pixels in the right place, but we're only going to paint within
// mBufferRect
IntRect quadrantRect = GetQuadrantRectangle(aXSide, aYSide);
IntRect fillRect;
if (!fillRect.IntersectRect(mBufferRect, quadrantRect))
return;
gfx::Point quadrantTranslation(quadrantRect.x, quadrantRect.y);
MOZ_ASSERT(aSource != BUFFER_BOTH);
RefPtr<SourceSurface> snapshot = GetSourceSurface(aSource);
if (!snapshot) {
gfxCriticalError() << "Invalid snapshot in RotatedBuffer::DrawBufferQuadrant";
return;
}
// direct2d is much slower when using OP_SOURCE so use OP_OVER and
// (maybe) a clear instead. Normally we need to draw in a single operation
// (to avoid flickering) but direct2d is ok since it defers rendering.
// We should try abstract this logic in a helper when we have other use
// cases.
if ((aTarget->GetBackendType() == BackendType::DIRECT2D ||
aTarget->GetBackendType() == BackendType::DIRECT2D1_1) &&
aOperator == CompositionOp::OP_SOURCE) {
aOperator = CompositionOp::OP_OVER;
if (snapshot->GetFormat() == SurfaceFormat::B8G8R8A8) {
aTarget->ClearRect(IntRectToRect(fillRect));
}
}
// OP_SOURCE is unbounded in Azure, and we really don't want that behaviour here.
// We also can't do a ClearRect+FillRect since we need the drawing to happen
// as an atomic operation (to prevent flickering).
// We also need this clip in the case where we have a mask, since the mask surface
// might cover more than fillRect, but we only want to touch the pixels inside
// fillRect.
aTarget->PushClipRect(IntRectToRect(fillRect));
if (aMask) {
Matrix oldTransform = aTarget->GetTransform();
// Transform from user -> buffer space.
Matrix transform =
Matrix::Translation(quadrantTranslation.x, quadrantTranslation.y);
Matrix inverseMask = *aMaskTransform;
inverseMask.Invert();
transform *= oldTransform;
transform *= inverseMask;
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
SurfacePattern source(snapshot, ExtendMode::CLAMP, transform, SamplingFilter::POINT);
#else
SurfacePattern source(snapshot, ExtendMode::CLAMP, transform);
#endif
aTarget->SetTransform(*aMaskTransform);
aTarget->MaskSurface(source, aMask, Point(0, 0), DrawOptions(aOpacity, aOperator));
aTarget->SetTransform(oldTransform);
} else {
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
DrawSurfaceOptions options(SamplingFilter::POINT);
#else
DrawSurfaceOptions options;
#endif
aTarget->DrawSurface(snapshot, IntRectToRect(fillRect),
GetSourceRectangle(aXSide, aYSide),
options,
DrawOptions(aOpacity, aOperator));
}
aTarget->PopClip();
}
void
RotatedBuffer::DrawBufferWithRotation(gfx::DrawTarget *aTarget, ContextSource aSource,
float aOpacity,
gfx::CompositionOp aOperator,
gfx::SourceSurface* aMask,
const gfx::Matrix* aMaskTransform) const
{
PROFILER_LABEL("RotatedBuffer", "DrawBufferWithRotation",
js::ProfileEntry::Category::GRAPHICS);
// See above, in Azure Repeat should always be a safe, even faster choice
// though! Particularly on D2D Repeat should be a lot faster, need to look
// into that. TODO[Bas]
DrawBufferQuadrant(aTarget, LEFT, TOP, aSource, aOpacity, aOperator, aMask, aMaskTransform);
DrawBufferQuadrant(aTarget, RIGHT, TOP, aSource, aOpacity, aOperator, aMask, aMaskTransform);
DrawBufferQuadrant(aTarget, LEFT, BOTTOM, aSource, aOpacity, aOperator, aMask, aMaskTransform);
DrawBufferQuadrant(aTarget, RIGHT, BOTTOM, aSource, aOpacity, aOperator,aMask, aMaskTransform);
}
already_AddRefed<SourceSurface>
SourceRotatedBuffer::GetSourceSurface(ContextSource aSource) const
{
RefPtr<SourceSurface> surf;
if (aSource == BUFFER_BLACK) {
surf = mSource;
} else {
MOZ_ASSERT(aSource == BUFFER_WHITE);
surf = mSourceOnWhite;
}
MOZ_ASSERT(surf);
return surf.forget();
}
/* static */ bool
RotatedContentBuffer::IsClippingCheap(DrawTarget* aTarget, const nsIntRegion& aRegion)
{
// Assume clipping is cheap if the draw target just has an integer
// translation, and the visible region is simple.
return !aTarget->GetTransform().HasNonIntegerTranslation() &&
aRegion.GetNumRects() <= 1;
}
void
RotatedContentBuffer::DrawTo(PaintedLayer* aLayer,
DrawTarget* aTarget,
float aOpacity,
CompositionOp aOp,
SourceSurface* aMask,
const Matrix* aMaskTransform)
{
if (!EnsureBuffer()) {
return;
}
bool clipped = false;
// If the entire buffer is valid, we can just draw the whole thing,
// no need to clip. But we'll still clip if clipping is cheap ---
// that might let us copy a smaller region of the buffer.
// Also clip to the visible region if we're told to.
if (!aLayer->GetValidRegion().Contains(BufferRect()) ||
(ToData(aLayer)->GetClipToVisibleRegion() &&
!aLayer->GetVisibleRegion().ToUnknownRegion().Contains(BufferRect())) ||
IsClippingCheap(aTarget, aLayer->GetLocalVisibleRegion().ToUnknownRegion())) {
// We don't want to draw invalid stuff, so we need to clip. Might as
// well clip to the smallest area possible --- the visible region.
// Bug 599189 if there is a non-integer-translation transform in aTarget,
// we might sample pixels outside GetLocalVisibleRegion(), which is wrong
// and may cause gray lines.
gfxUtils::ClipToRegion(aTarget, aLayer->GetLocalVisibleRegion().ToUnknownRegion());
clipped = true;
}
DrawBufferWithRotation(aTarget, BUFFER_BLACK, aOpacity, aOp, aMask, aMaskTransform);
if (clipped) {
aTarget->PopClip();
}
}
DrawTarget*
RotatedContentBuffer::BorrowDrawTargetForQuadrantUpdate(const IntRect& aBounds,
ContextSource aSource,
DrawIterator* aIter)
{
IntRect bounds = aBounds;
if (aIter) {
// If an iterator was provided, then BeginPaint must have been run with
// PAINT_CAN_DRAW_ROTATED, and the draw region might cover multiple quadrants.
// Iterate over each of them, and return an appropriate buffer each time we find
// one that intersects the draw region. The iterator mCount value tracks which
// quadrants we have considered across multiple calls to this function.
aIter->mDrawRegion.SetEmpty();
while (aIter->mCount < 4) {
IntRect quadrant = GetQuadrantRectangle((aIter->mCount & 1) ? LEFT : RIGHT,
(aIter->mCount & 2) ? TOP : BOTTOM);
aIter->mDrawRegion.And(aBounds, quadrant);
aIter->mCount++;
if (!aIter->mDrawRegion.IsEmpty()) {
break;
}
}
if (aIter->mDrawRegion.IsEmpty()) {
return nullptr;
}
bounds = aIter->mDrawRegion.GetBounds();
}
if (!EnsureBuffer()) {
return nullptr;
}
MOZ_ASSERT(!mLoanedDrawTarget, "draw target has been borrowed and not returned");
if (aSource == BUFFER_BOTH && HaveBufferOnWhite()) {
if (!EnsureBufferOnWhite()) {
return nullptr;
}
MOZ_ASSERT(mDTBuffer && mDTBuffer->IsValid() && mDTBufferOnWhite && mDTBufferOnWhite->IsValid());
mLoanedDrawTarget = Factory::CreateDualDrawTarget(mDTBuffer, mDTBufferOnWhite);
} else if (aSource == BUFFER_WHITE) {
if (!EnsureBufferOnWhite()) {
return nullptr;
}
mLoanedDrawTarget = mDTBufferOnWhite;
} else {
// BUFFER_BLACK, or BUFFER_BOTH with a single buffer.
mLoanedDrawTarget = mDTBuffer;
}
// Figure out which quadrant to draw in
int32_t xBoundary = mBufferRect.XMost() - mBufferRotation.x;
int32_t yBoundary = mBufferRect.YMost() - mBufferRotation.y;
XSide sideX = bounds.XMost() <= xBoundary ? RIGHT : LEFT;
YSide sideY = bounds.YMost() <= yBoundary ? BOTTOM : TOP;
IntRect quadrantRect = GetQuadrantRectangle(sideX, sideY);
NS_ASSERTION(quadrantRect.Contains(bounds), "Messed up quadrants");
mLoanedTransform = mLoanedDrawTarget->GetTransform();
mLoanedDrawTarget->SetTransform(Matrix(mLoanedTransform).
PreTranslate(-quadrantRect.x,
-quadrantRect.y));
return mLoanedDrawTarget;
}
void
BorrowDrawTarget::ReturnDrawTarget(gfx::DrawTarget*& aReturned)
{
MOZ_ASSERT(mLoanedDrawTarget);
MOZ_ASSERT(aReturned == mLoanedDrawTarget);
if (mLoanedDrawTarget) {
mLoanedDrawTarget->SetTransform(mLoanedTransform);
mLoanedDrawTarget = nullptr;
}
aReturned = nullptr;
}
gfxContentType
RotatedContentBuffer::BufferContentType()
{
if (mBufferProvider || (mDTBuffer && mDTBuffer->IsValid())) {
SurfaceFormat format = SurfaceFormat::B8G8R8A8;
if (mBufferProvider) {
format = mBufferProvider->GetFormat();
} else if (mDTBuffer && mDTBuffer->IsValid()) {
format = mDTBuffer->GetFormat();
}
return ContentForFormat(format);
}
return gfxContentType::SENTINEL;
}
bool
RotatedContentBuffer::BufferSizeOkFor(const IntSize& aSize)
{
return (aSize == mBufferRect.Size() ||
(SizedToVisibleBounds != mBufferSizePolicy &&
aSize < mBufferRect.Size()));
}
bool
RotatedContentBuffer::EnsureBuffer()
{
NS_ASSERTION(!mLoanedDrawTarget, "Loaned draw target must be returned");
if (!mDTBuffer || !mDTBuffer->IsValid()) {
if (mBufferProvider) {
mDTBuffer = mBufferProvider->BorrowDrawTarget();
}
}
NS_WARN_IF_FALSE(mDTBuffer && mDTBuffer->IsValid(), "no buffer");
return !!mDTBuffer;
}
bool
RotatedContentBuffer::EnsureBufferOnWhite()
{
NS_ASSERTION(!mLoanedDrawTarget, "Loaned draw target must be returned");
if (!mDTBufferOnWhite) {
if (mBufferProviderOnWhite) {
mDTBufferOnWhite =
mBufferProviderOnWhite->BorrowDrawTarget();
}
}
NS_WARN_IF_FALSE(mDTBufferOnWhite, "no buffer");
return !!mDTBufferOnWhite;
}
bool
RotatedContentBuffer::HaveBuffer() const
{
return mBufferProvider || (mDTBuffer && mDTBuffer->IsValid());
}
bool
RotatedContentBuffer::HaveBufferOnWhite() const
{
return mBufferProviderOnWhite || (mDTBufferOnWhite && mDTBufferOnWhite->IsValid());
}
static void
WrapRotationAxis(int32_t* aRotationPoint, int32_t aSize)
{
if (*aRotationPoint < 0) {
*aRotationPoint += aSize;
} else if (*aRotationPoint >= aSize) {
*aRotationPoint -= aSize;
}
}
static IntRect
ComputeBufferRect(const IntRect& aRequestedRect)
{
IntRect rect(aRequestedRect);
// Set a minimum width to guarantee a minimum size of buffers we
// allocate (and work around problems on some platforms with smaller
// dimensions). 64 is the magic number needed to work around the
// rendering glitch, and guarantees image rows can be SIMD'd for
// even r5g6b5 surfaces pretty much everywhere.
rect.width = std::max(aRequestedRect.width, 64);
#ifdef MOZ_WIDGET_GONK
// Set a minumum height to guarantee a minumum height of buffers we
// allocate. Some GL implementations fail to render gralloc textures
// with a height 9px-16px. It happens on Adreno 200. Adreno 320 does not
// have this problem. 32 is choosed as alignment of gralloc buffers.
// See Bug 873937.
// Increase the height only when the requested height is more than 0.
// See Bug 895976.
// XXX it might be better to disable it on the gpu that does not have
// the height problem.
if (rect.height > 0) {
rect.height = std::max(aRequestedRect.height, 32);
}
#endif
return rect;
}
void
RotatedContentBuffer::FlushBuffers()
{
if (mDTBuffer) {
mDTBuffer->Flush();
}
if (mDTBufferOnWhite) {
mDTBufferOnWhite->Flush();
}
}
RotatedContentBuffer::PaintState
RotatedContentBuffer::BeginPaint(PaintedLayer* aLayer,
uint32_t aFlags)
{
PaintState result;
// We need to disable rotation if we're going to be resampled when
// drawing, because we might sample across the rotation boundary.
bool canHaveRotation = gfxPlatform::BufferRotationEnabled() &&
!(aFlags & (PAINT_WILL_RESAMPLE | PAINT_NO_ROTATION));
nsIntRegion validRegion = aLayer->GetValidRegion();
bool canUseOpaqueSurface = aLayer->CanUseOpaqueSurface();
ContentType layerContentType =
canUseOpaqueSurface ? gfxContentType::COLOR :
gfxContentType::COLOR_ALPHA;
SurfaceMode mode;
nsIntRegion neededRegion;
IntRect destBufferRect;
bool canReuseBuffer = HaveBuffer();
while (true) {
mode = aLayer->GetSurfaceMode();
neededRegion = aLayer->GetVisibleRegion().ToUnknownRegion();
canReuseBuffer &= BufferSizeOkFor(neededRegion.GetBounds().Size());
result.mContentType = layerContentType;
if (canReuseBuffer) {
if (mBufferRect.Contains(neededRegion.GetBounds())) {
// We don't need to adjust mBufferRect.
destBufferRect = mBufferRect;
} else if (neededRegion.GetBounds().Size() <= mBufferRect.Size()) {
// The buffer's big enough but doesn't contain everything that's
// going to be visible. We'll move it.
destBufferRect = IntRect(neededRegion.GetBounds().TopLeft(), mBufferRect.Size());
} else {
destBufferRect = neededRegion.GetBounds();
}
} else {
// We won't be reusing the buffer. Compute a new rect.
destBufferRect = ComputeBufferRect(neededRegion.GetBounds());
}
if (mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
#if defined(MOZ_GFX_OPTIMIZE_MOBILE) || defined(MOZ_WIDGET_GONK)
mode = SurfaceMode::SURFACE_SINGLE_CHANNEL_ALPHA;
#else
if (!aLayer->GetParent() ||
!aLayer->GetParent()->SupportsComponentAlphaChildren() ||
!aLayer->AsShadowableLayer() ||
!aLayer->AsShadowableLayer()->HasShadow()) {
mode = SurfaceMode::SURFACE_SINGLE_CHANNEL_ALPHA;
} else {
result.mContentType = gfxContentType::COLOR;
}
#endif
}
if ((aFlags & PAINT_WILL_RESAMPLE) &&
(!neededRegion.GetBounds().IsEqualInterior(destBufferRect) ||
neededRegion.GetNumRects() > 1))
{
// The area we add to neededRegion might not be painted opaquely.
if (mode == SurfaceMode::SURFACE_OPAQUE) {
result.mContentType = gfxContentType::COLOR_ALPHA;
mode = SurfaceMode::SURFACE_SINGLE_CHANNEL_ALPHA;
}
// We need to validate the entire buffer, to make sure that only valid
// pixels are sampled.
neededRegion = destBufferRect;
}
// If we have an existing buffer, but the content type has changed or we
// have transitioned into/out of component alpha, then we need to recreate it.
if (canReuseBuffer &&
(result.mContentType != BufferContentType() ||
(mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) != HaveBufferOnWhite()))
{
// Restart the decision process; we won't re-enter since we guard on
// being able to re-use the buffer.
canReuseBuffer = false;
continue;
}
break;
}
if (HaveBuffer() &&
(result.mContentType != BufferContentType() ||
(mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) != HaveBufferOnWhite()))
{
// We're effectively clearing the valid region, so we need to draw
// the entire needed region now.
canReuseBuffer = false;
result.mRegionToInvalidate = aLayer->GetValidRegion();
validRegion.SetEmpty();
Clear();
#if defined(MOZ_DUMP_PAINTING)
if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
if (result.mContentType != BufferContentType()) {
printf_stderr("Invalidating entire rotated buffer (layer %p): content type changed\n", aLayer);
} else if ((mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) != HaveBufferOnWhite()) {
printf_stderr("Invalidating entire rotated buffer (layer %p): component alpha changed\n", aLayer);
}
}
#endif
}
NS_ASSERTION(destBufferRect.Contains(neededRegion.GetBounds()),
"Destination rect doesn't contain what we need to paint");
result.mRegionToDraw.Sub(neededRegion, validRegion);
if (result.mRegionToDraw.IsEmpty())
return result;
if (HaveBuffer()) {
// Do not modify result.mRegionToDraw or result.mContentType after this call.
// Do not modify mBufferRect, mBufferRotation, or mDidSelfCopy,
// or call CreateBuffer before this call.
FinalizeFrame(result.mRegionToDraw);
}
IntRect drawBounds = result.mRegionToDraw.GetBounds();
RefPtr<DrawTarget> destDTBuffer;
RefPtr<DrawTarget> destDTBufferOnWhite;
uint32_t bufferFlags = 0;
if (mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
bufferFlags |= BUFFER_COMPONENT_ALPHA;
}
if (canReuseBuffer) {
if (!EnsureBuffer()) {
return result;
}
IntRect keepArea;
if (keepArea.IntersectRect(destBufferRect, mBufferRect)) {
// Set mBufferRotation so that the pixels currently in mDTBuffer
// will still be rendered in the right place when mBufferRect
// changes to destBufferRect.
IntPoint newRotation = mBufferRotation +
(destBufferRect.TopLeft() - mBufferRect.TopLeft());
WrapRotationAxis(&newRotation.x, mBufferRect.width);
WrapRotationAxis(&newRotation.y, mBufferRect.height);
NS_ASSERTION(gfx::IntRect(gfx::IntPoint(0,0), mBufferRect.Size()).Contains(newRotation),
"newRotation out of bounds");
int32_t xBoundary = destBufferRect.XMost() - newRotation.x;
int32_t yBoundary = destBufferRect.YMost() - newRotation.y;
bool drawWrapsBuffer = (drawBounds.x < xBoundary && xBoundary < drawBounds.XMost()) ||
(drawBounds.y < yBoundary && yBoundary < drawBounds.YMost());
if ((drawWrapsBuffer && !(aFlags & PAINT_CAN_DRAW_ROTATED)) ||
(newRotation != IntPoint(0,0) && !canHaveRotation)) {
// The stuff we need to redraw will wrap around an edge of the
// buffer (and the caller doesn't know how to support that), so
// move the pixels we can keep into a position that lets us
// redraw in just one quadrant.
if (mBufferRotation == IntPoint(0,0)) {
IntRect srcRect(IntPoint(0, 0), mBufferRect.Size());
IntPoint dest = mBufferRect.TopLeft() - destBufferRect.TopLeft();
MOZ_ASSERT(mDTBuffer && mDTBuffer->IsValid());
mDTBuffer->CopyRect(srcRect, dest);
if (mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
if (!EnsureBufferOnWhite()) {
return result;
}
MOZ_ASSERT(mDTBufferOnWhite && mDTBufferOnWhite->IsValid());
mDTBufferOnWhite->CopyRect(srcRect, dest);
}
result.mDidSelfCopy = true;
mDidSelfCopy = true;
// Don't set destBuffer; we special-case self-copies, and
// just did the necessary work above.
mBufferRect = destBufferRect;
} else {
// With azure and a data surface perform an buffer unrotate
// (SelfCopy).
unsigned char* data;
IntSize size;
int32_t stride;
SurfaceFormat format;
if (mDTBuffer->LockBits(&data, &size, &stride, &format)) {
uint8_t bytesPerPixel = BytesPerPixel(format);
BufferUnrotate(data,
size.width * bytesPerPixel,
size.height, stride,
newRotation.x * bytesPerPixel, newRotation.y);
mDTBuffer->ReleaseBits(data);
if (mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
if (!EnsureBufferOnWhite()) {
return result;
}
MOZ_ASSERT(mDTBufferOnWhite && mDTBufferOnWhite->IsValid());
mDTBufferOnWhite->LockBits(&data, &size, &stride, &format);
uint8_t bytesPerPixel = BytesPerPixel(format);
BufferUnrotate(data,
size.width * bytesPerPixel,
size.height, stride,
newRotation.x * bytesPerPixel, newRotation.y);
mDTBufferOnWhite->ReleaseBits(data);
}
// Buffer unrotate moves all the pixels, note that
// we self copied for SyncBackToFrontBuffer
result.mDidSelfCopy = true;
mDidSelfCopy = true;
mBufferRect = destBufferRect;
mBufferRotation = IntPoint(0, 0);
}
if (!result.mDidSelfCopy) {
destBufferRect = ComputeBufferRect(neededRegion.GetBounds());
CreateBuffer(result.mContentType, destBufferRect, bufferFlags,
&destDTBuffer, &destDTBufferOnWhite);
if (!destDTBuffer ||
(!destDTBufferOnWhite && (bufferFlags & BUFFER_COMPONENT_ALPHA))) {
gfxCriticalError(CriticalLog::DefaultOptions(Factory::ReasonableSurfaceSize(IntSize(destBufferRect.width, destBufferRect.height)))) << "Failed 1 buffer db=" << hexa(destDTBuffer.get()) << " dw=" << hexa(destDTBufferOnWhite.get()) << " for " << destBufferRect.x << ", " << destBufferRect.y << ", " << destBufferRect.width << ", " << destBufferRect.height;
return result;
}
}
}
} else {
mBufferRect = destBufferRect;
mBufferRotation = newRotation;
}
} else {
// No pixels are going to be kept. The whole visible region
// will be redrawn, so we don't need to copy anything, so we don't
// set destBuffer.
mBufferRect = destBufferRect;
mBufferRotation = IntPoint(0,0);
}
} else {
// The buffer's not big enough, so allocate a new one
CreateBuffer(result.mContentType, destBufferRect, bufferFlags,
&destDTBuffer, &destDTBufferOnWhite);
if (!destDTBuffer ||
(!destDTBufferOnWhite && (bufferFlags & BUFFER_COMPONENT_ALPHA))) {
gfxCriticalError(CriticalLog::DefaultOptions(Factory::ReasonableSurfaceSize(IntSize(destBufferRect.width, destBufferRect.height)))) << "Failed 2 buffer db=" << hexa(destDTBuffer.get()) << " dw=" << hexa(destDTBufferOnWhite.get()) << " for " << destBufferRect.x << ", " << destBufferRect.y << ", " << destBufferRect.width << ", " << destBufferRect.height;
return result;
}
}
NS_ASSERTION(!(aFlags & PAINT_WILL_RESAMPLE) || destBufferRect == neededRegion.GetBounds(),
"If we're resampling, we need to validate the entire buffer");
// If we have no buffered data already, then destBuffer will be a fresh buffer
// and we do not need to clear it below.
bool isClear = !HaveBuffer();
if (destDTBuffer) {
if (!isClear && (mode != SurfaceMode::SURFACE_COMPONENT_ALPHA || HaveBufferOnWhite())) {
// Copy the bits
IntPoint offset = -destBufferRect.TopLeft();
Matrix mat = Matrix::Translation(offset.x, offset.y);
destDTBuffer->SetTransform(mat);
if (!EnsureBuffer()) {
return result;
}
MOZ_ASSERT(mDTBuffer && mDTBuffer->IsValid(), "Have we got a Thebes buffer for some reason?");
DrawBufferWithRotation(destDTBuffer, BUFFER_BLACK, 1.0, CompositionOp::OP_SOURCE);
destDTBuffer->SetTransform(Matrix());
if (mode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
if (!destDTBufferOnWhite || !EnsureBufferOnWhite()) {
return result;
}
MOZ_ASSERT(mDTBufferOnWhite && mDTBufferOnWhite->IsValid(), "Have we got a Thebes buffer for some reason?");
destDTBufferOnWhite->SetTransform(mat);
DrawBufferWithRotation(destDTBufferOnWhite, BUFFER_WHITE, 1.0, CompositionOp::OP_SOURCE);
destDTBufferOnWhite->SetTransform(Matrix());
}
}
mDTBuffer = destDTBuffer.forget();
mDTBufferOnWhite = destDTBufferOnWhite.forget();
mBufferRect = destBufferRect;
mBufferRotation = IntPoint(0,0);
}
NS_ASSERTION(canHaveRotation || mBufferRotation == IntPoint(0,0),
"Rotation disabled, but we have nonzero rotation?");
nsIntRegion invalidate;
invalidate.Sub(aLayer->GetValidRegion(), destBufferRect);
result.mRegionToInvalidate.Or(result.mRegionToInvalidate, invalidate);
result.mClip = DrawRegionClip::DRAW;
result.mMode = mode;
return result;
}
DrawTarget*
RotatedContentBuffer::BorrowDrawTargetForPainting(PaintState& aPaintState,
DrawIterator* aIter /* = nullptr */)
{
if (aPaintState.mMode == SurfaceMode::SURFACE_NONE) {
return nullptr;
}
DrawTarget* result = BorrowDrawTargetForQuadrantUpdate(aPaintState.mRegionToDraw.GetBounds(),
BUFFER_BOTH, aIter);
if (!result) {
return nullptr;
}
nsIntRegion* drawPtr = &aPaintState.mRegionToDraw;
if (aIter) {
// The iterators draw region currently only contains the bounds of the region,
// this makes it the precise region.
aIter->mDrawRegion.And(aIter->mDrawRegion, aPaintState.mRegionToDraw);
drawPtr = &aIter->mDrawRegion;
}
if (result->GetBackendType() == BackendType::DIRECT2D ||
result->GetBackendType() == BackendType::DIRECT2D1_1) {
// Simplify the draw region to avoid hitting expensive drawing paths
// for complex regions.
drawPtr->SimplifyOutwardByArea(100 * 100);
}
if (aPaintState.mMode == SurfaceMode::SURFACE_COMPONENT_ALPHA) {
if (!mDTBuffer || !mDTBuffer->IsValid() ||
!mDTBufferOnWhite || !mDTBufferOnWhite->IsValid()) {
// This can happen in release builds if allocating one of the two buffers
// failed. This in turn can happen if unreasonably large textures are
// requested.
return nullptr;
}
for (auto iter = drawPtr->RectIter(); !iter.Done(); iter.Next()) {
const IntRect& rect = iter.Get();
mDTBuffer->FillRect(Rect(rect.x, rect.y, rect.width, rect.height),
ColorPattern(Color(0.0, 0.0, 0.0, 1.0)));
mDTBufferOnWhite->FillRect(Rect(rect.x, rect.y, rect.width, rect.height),
ColorPattern(Color(1.0, 1.0, 1.0, 1.0)));
}
} else if (aPaintState.mContentType == gfxContentType::COLOR_ALPHA && HaveBuffer()) {
// HaveBuffer() => we have an existing buffer that we must clear
for (auto iter = drawPtr->RectIter(); !iter.Done(); iter.Next()) {
const IntRect& rect = iter.Get();
result->ClearRect(Rect(rect.x, rect.y, rect.width, rect.height));
}
}
return result;
}
already_AddRefed<SourceSurface>
RotatedContentBuffer::GetSourceSurface(ContextSource aSource) const
{
if (!mDTBuffer || !mDTBuffer->IsValid()) {
gfxCriticalNote << "Invalid buffer in RotatedContentBuffer::GetSourceSurface " << gfx::hexa(mDTBuffer);
return nullptr;
}
if (aSource == BUFFER_BLACK) {
return mDTBuffer->Snapshot();
} else {
if (!mDTBufferOnWhite || !mDTBufferOnWhite->IsValid()) {
gfxCriticalNote << "Invalid buffer on white in RotatedContentBuffer::GetSourceSurface " << gfx::hexa(mDTBufferOnWhite);
return nullptr;
}
MOZ_ASSERT(aSource == BUFFER_WHITE);
return mDTBufferOnWhite->Snapshot();
}
}
} // namespace layers
} // namespace mozilla
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