mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
19e3aaf675
--HG-- rename : layout/svg/nsSVGFilterInstance.cpp => layout/svg/nsFilterInstance.cpp rename : layout/svg/nsSVGFilterInstance.h => layout/svg/nsFilterInstance.h
587 lines
19 KiB
C++
587 lines
19 KiB
C++
/* -*- 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/. */
|
|
|
|
// Main header first:
|
|
#include "nsFilterInstance.h"
|
|
|
|
// Keep others in (case-insensitive) order:
|
|
#include "gfxPlatform.h"
|
|
#include "gfxUtils.h"
|
|
#include "nsISVGChildFrame.h"
|
|
#include "nsRenderingContext.h"
|
|
#include "nsSVGFilterInstance.h"
|
|
#include "nsSVGFilterPaintCallback.h"
|
|
#include "nsSVGUtils.h"
|
|
#include "SVGContentUtils.h"
|
|
#include "FilterSupport.h"
|
|
#include "gfx2DGlue.h"
|
|
|
|
using namespace mozilla;
|
|
using namespace mozilla::dom;
|
|
using namespace mozilla::gfx;
|
|
|
|
nsresult
|
|
nsFilterInstance::PaintFilteredFrame(nsRenderingContext *aContext,
|
|
nsIFrame *aFilteredFrame,
|
|
nsSVGFilterPaintCallback *aPaintCallback,
|
|
const nsRect *aDirtyArea,
|
|
nsIFrame* aTransformRoot)
|
|
{
|
|
nsFilterInstance instance(aFilteredFrame, aPaintCallback, aDirtyArea,
|
|
nullptr, nullptr, nullptr,
|
|
aTransformRoot);
|
|
if (!instance.IsInitialized()) {
|
|
return NS_OK;
|
|
}
|
|
return instance.Render(aContext->ThebesContext());
|
|
}
|
|
|
|
nsRect
|
|
nsFilterInstance::GetPostFilterDirtyArea(nsIFrame *aFilteredFrame,
|
|
const nsRect& aPreFilterDirtyRect)
|
|
{
|
|
if (aPreFilterDirtyRect.IsEmpty()) {
|
|
return nsRect();
|
|
}
|
|
|
|
nsFilterInstance instance(aFilteredFrame, nullptr, nullptr,
|
|
&aPreFilterDirtyRect);
|
|
if (!instance.IsInitialized()) {
|
|
return nsRect();
|
|
}
|
|
// We've passed in the source's dirty area so the instance knows about it.
|
|
// Now we can ask the instance to compute the area of the filter output
|
|
// that's dirty.
|
|
nsRect dirtyRect;
|
|
nsresult rv = instance.ComputePostFilterDirtyRect(&dirtyRect);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return dirtyRect;
|
|
}
|
|
return nsRect();
|
|
}
|
|
|
|
nsRect
|
|
nsFilterInstance::GetPreFilterNeededArea(nsIFrame *aFilteredFrame,
|
|
const nsRect& aPostFilterDirtyRect)
|
|
{
|
|
nsFilterInstance instance(aFilteredFrame, nullptr, &aPostFilterDirtyRect);
|
|
if (!instance.IsInitialized()) {
|
|
return nsRect();
|
|
}
|
|
// Now we can ask the instance to compute the area of the source
|
|
// that's needed.
|
|
nsRect neededRect;
|
|
nsresult rv = instance.ComputeSourceNeededRect(&neededRect);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return neededRect;
|
|
}
|
|
return nsRect();
|
|
}
|
|
|
|
nsRect
|
|
nsFilterInstance::GetPostFilterBounds(nsIFrame *aFilteredFrame,
|
|
const gfxRect *aOverrideBBox,
|
|
const nsRect *aPreFilterBounds)
|
|
{
|
|
MOZ_ASSERT(!(aFilteredFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) ||
|
|
!(aFilteredFrame->GetStateBits() & NS_FRAME_IS_NONDISPLAY),
|
|
"Non-display SVG do not maintain visual overflow rects");
|
|
|
|
nsFilterInstance instance(aFilteredFrame, nullptr, nullptr,
|
|
aPreFilterBounds, aPreFilterBounds,
|
|
aOverrideBBox);
|
|
if (!instance.IsInitialized()) {
|
|
return nsRect();
|
|
}
|
|
nsRect bbox;
|
|
nsresult rv = instance.ComputePostFilterExtents(&bbox);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return bbox;
|
|
}
|
|
return nsRect();
|
|
}
|
|
|
|
nsFilterInstance::nsFilterInstance(nsIFrame *aTargetFrame,
|
|
nsSVGFilterPaintCallback *aPaintCallback,
|
|
const nsRect *aPostFilterDirtyRect,
|
|
const nsRect *aPreFilterDirtyRect,
|
|
const nsRect *aPreFilterVisualOverflowRectOverride,
|
|
const gfxRect *aOverrideBBox,
|
|
nsIFrame* aTransformRoot) :
|
|
mTargetFrame(aTargetFrame),
|
|
mPaintCallback(aPaintCallback),
|
|
mTransformRoot(aTransformRoot),
|
|
mInitialized(false) {
|
|
|
|
mTargetBBox = aOverrideBBox ?
|
|
*aOverrideBBox : nsSVGUtils::GetBBox(mTargetFrame);
|
|
|
|
nsresult rv = BuildPrimitives();
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
|
|
if (mPrimitiveDescriptions.IsEmpty()) {
|
|
// Nothing should be rendered.
|
|
return;
|
|
}
|
|
|
|
// Get various transforms:
|
|
|
|
gfxMatrix filterToUserSpace(mFilterRegion.Width() / mFilterSpaceBounds.width, 0.0f,
|
|
0.0f, mFilterRegion.Height() / mFilterSpaceBounds.height,
|
|
mFilterRegion.X(), mFilterRegion.Y());
|
|
|
|
// Only used (so only set) when we paint:
|
|
if (mPaintCallback) {
|
|
mFilterSpaceToDeviceSpaceTransform = filterToUserSpace *
|
|
nsSVGUtils::GetCanvasTM(mTargetFrame, nsISVGChildFrame::FOR_PAINTING);
|
|
}
|
|
|
|
// Convert the passed in rects from frame to filter space:
|
|
|
|
mAppUnitsPerCSSPx = mTargetFrame->PresContext()->AppUnitsPerCSSPixel();
|
|
|
|
mFilterSpaceToFrameSpaceInCSSPxTransform =
|
|
filterToUserSpace * GetUserSpaceToFrameSpaceInCSSPxTransform();
|
|
// mFilterSpaceToFrameSpaceInCSSPxTransform is always invertible
|
|
mFrameSpaceInCSSPxToFilterSpaceTransform =
|
|
mFilterSpaceToFrameSpaceInCSSPxTransform;
|
|
mFrameSpaceInCSSPxToFilterSpaceTransform.Invert();
|
|
|
|
mPostFilterDirtyRect = FrameSpaceToFilterSpace(aPostFilterDirtyRect);
|
|
mPreFilterDirtyRect = FrameSpaceToFilterSpace(aPreFilterDirtyRect);
|
|
if (aPreFilterVisualOverflowRectOverride) {
|
|
mTargetBounds =
|
|
FrameSpaceToFilterSpace(aPreFilterVisualOverflowRectOverride);
|
|
} else {
|
|
nsRect preFilterVOR = mTargetFrame->GetPreEffectsVisualOverflowRect();
|
|
mTargetBounds = FrameSpaceToFilterSpace(&preFilterVOR);
|
|
}
|
|
|
|
mInitialized = true;
|
|
}
|
|
|
|
gfxRect
|
|
nsFilterInstance::UserSpaceToFilterSpace(const gfxRect& aRect) const
|
|
{
|
|
gfxRect r = aRect - mFilterRegion.TopLeft();
|
|
r.Scale(mFilterSpaceBounds.width / mFilterRegion.Width(),
|
|
mFilterSpaceBounds.height / mFilterRegion.Height());
|
|
return r;
|
|
}
|
|
|
|
gfxMatrix
|
|
nsFilterInstance::GetUserSpaceToFilterSpaceTransform() const
|
|
{
|
|
gfxFloat widthScale = mFilterSpaceBounds.width / mFilterRegion.Width();
|
|
gfxFloat heightScale = mFilterSpaceBounds.height / mFilterRegion.Height();
|
|
return gfxMatrix(widthScale, 0.0f,
|
|
0.0f, heightScale,
|
|
-mFilterRegion.X() * widthScale, -mFilterRegion.Y() * heightScale);
|
|
}
|
|
|
|
nsresult
|
|
nsFilterInstance::BuildPrimitives()
|
|
{
|
|
NS_ASSERTION(!mPrimitiveDescriptions.Length(),
|
|
"expected to start building primitives from scratch");
|
|
|
|
const nsTArray<nsStyleFilter>& filters = mTargetFrame->StyleSVGReset()->mFilters;
|
|
for (uint32_t i = 0; i < filters.Length(); i++) {
|
|
nsresult rv = BuildPrimitivesForFilter(filters[i]);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsFilterInstance::BuildPrimitivesForFilter(const nsStyleFilter& aFilter)
|
|
{
|
|
if (aFilter.GetType() == NS_STYLE_FILTER_URL) {
|
|
// Build primitives for an SVG filter.
|
|
nsSVGFilterInstance svgFilterInstance(aFilter, mTargetFrame, mTargetBBox);
|
|
if (!svgFilterInstance.IsInitialized()) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// For now, we use the last SVG filter region as the overall filter region
|
|
// for the filter chain. Eventually, we will compute the overall filter
|
|
// using all of the generated FilterPrimitiveDescriptions.
|
|
mFilterRegion = svgFilterInstance.GetFilterRegion();
|
|
mFilterSpaceBounds = svgFilterInstance.GetFilterSpaceBounds();
|
|
|
|
return svgFilterInstance.BuildPrimitives(mPrimitiveDescriptions, mInputImages);
|
|
}
|
|
|
|
// Eventually, we will build primitives for CSS filters, too.
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
void
|
|
nsFilterInstance::ComputeNeededBoxes()
|
|
{
|
|
if (mPrimitiveDescriptions.IsEmpty())
|
|
return;
|
|
|
|
nsIntRegion sourceGraphicNeededRegion;
|
|
nsIntRegion fillPaintNeededRegion;
|
|
nsIntRegion strokePaintNeededRegion;
|
|
|
|
FilterDescription filter(mPrimitiveDescriptions, ToIntRect(mFilterSpaceBounds));
|
|
FilterSupport::ComputeSourceNeededRegions(
|
|
filter, mPostFilterDirtyRect,
|
|
sourceGraphicNeededRegion, fillPaintNeededRegion, strokePaintNeededRegion);
|
|
|
|
nsIntRect sourceBoundsInt;
|
|
gfxRect sourceBounds = UserSpaceToFilterSpace(mTargetBBox);
|
|
sourceBounds.RoundOut();
|
|
// Detect possible float->int overflow
|
|
if (!gfxUtils::GfxRectToIntRect(sourceBounds, &sourceBoundsInt))
|
|
return;
|
|
sourceBoundsInt.UnionRect(sourceBoundsInt, mTargetBounds);
|
|
|
|
sourceGraphicNeededRegion.And(sourceGraphicNeededRegion, sourceBoundsInt);
|
|
|
|
mSourceGraphic.mNeededBounds = sourceGraphicNeededRegion.GetBounds();
|
|
mFillPaint.mNeededBounds = fillPaintNeededRegion.GetBounds();
|
|
mStrokePaint.mNeededBounds = strokePaintNeededRegion.GetBounds();
|
|
}
|
|
|
|
nsresult
|
|
nsFilterInstance::BuildSourcePaint(SourceInfo *aSource,
|
|
gfxASurface* aTargetSurface,
|
|
DrawTarget* aTargetDT)
|
|
{
|
|
nsIntRect neededRect = aSource->mNeededBounds;
|
|
|
|
RefPtr<DrawTarget> offscreenDT;
|
|
nsRefPtr<gfxASurface> offscreenSurface;
|
|
nsRefPtr<gfxContext> ctx;
|
|
if (aTargetSurface) {
|
|
offscreenSurface = gfxPlatform::GetPlatform()->CreateOffscreenSurface(
|
|
neededRect.Size().ToIntSize(), gfxContentType::COLOR_ALPHA);
|
|
if (!offscreenSurface || offscreenSurface->CairoStatus()) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
ctx = new gfxContext(offscreenSurface);
|
|
} else {
|
|
offscreenDT = gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
|
|
ToIntSize(neededRect.Size()), SurfaceFormat::B8G8R8A8);
|
|
if (!offscreenDT) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
ctx = new gfxContext(offscreenDT);
|
|
}
|
|
|
|
ctx->Translate(-neededRect.TopLeft());
|
|
|
|
nsRenderingContext tmpCtx;
|
|
tmpCtx.Init(mTargetFrame->PresContext()->DeviceContext(), ctx);
|
|
|
|
gfxMatrix m = GetUserSpaceToFilterSpaceTransform();
|
|
m.Invert();
|
|
gfxRect r = m.TransformBounds(mFilterSpaceBounds);
|
|
|
|
gfxMatrix deviceToFilterSpace = GetFilterSpaceToDeviceSpaceTransform().Invert();
|
|
gfxContext *gfx = tmpCtx.ThebesContext();
|
|
gfx->Multiply(deviceToFilterSpace);
|
|
|
|
gfx->Save();
|
|
|
|
gfxMatrix matrix =
|
|
nsSVGUtils::GetCanvasTM(mTargetFrame, nsISVGChildFrame::FOR_PAINTING,
|
|
mTransformRoot);
|
|
if (!matrix.IsSingular()) {
|
|
gfx->Multiply(matrix);
|
|
gfx->Rectangle(r);
|
|
if ((aSource == &mFillPaint &&
|
|
nsSVGUtils::SetupCairoFillPaint(mTargetFrame, gfx)) ||
|
|
(aSource == &mStrokePaint &&
|
|
nsSVGUtils::SetupCairoStrokePaint(mTargetFrame, gfx))) {
|
|
gfx->Fill();
|
|
}
|
|
}
|
|
gfx->Restore();
|
|
|
|
if (offscreenSurface) {
|
|
aSource->mSourceSurface =
|
|
gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(aTargetDT, offscreenSurface);
|
|
} else {
|
|
aSource->mSourceSurface = offscreenDT->Snapshot();
|
|
}
|
|
aSource->mSurfaceRect = ToIntRect(neededRect);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsFilterInstance::BuildSourcePaints(gfxASurface* aTargetSurface,
|
|
DrawTarget* aTargetDT)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
if (!mFillPaint.mNeededBounds.IsEmpty()) {
|
|
rv = BuildSourcePaint(&mFillPaint, aTargetSurface, aTargetDT);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
if (!mStrokePaint.mNeededBounds.IsEmpty()) {
|
|
rv = BuildSourcePaint(&mStrokePaint, aTargetSurface, aTargetDT);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsFilterInstance::BuildSourceImage(gfxASurface* aTargetSurface,
|
|
DrawTarget* aTargetDT)
|
|
{
|
|
nsIntRect neededRect = mSourceGraphic.mNeededBounds;
|
|
if (neededRect.IsEmpty()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
RefPtr<DrawTarget> offscreenDT;
|
|
nsRefPtr<gfxASurface> offscreenSurface;
|
|
nsRefPtr<gfxContext> ctx;
|
|
if (aTargetSurface) {
|
|
offscreenSurface = gfxPlatform::GetPlatform()->CreateOffscreenSurface(
|
|
neededRect.Size().ToIntSize(), gfxContentType::COLOR_ALPHA);
|
|
if (!offscreenSurface || offscreenSurface->CairoStatus()) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
ctx = new gfxContext(offscreenSurface);
|
|
} else {
|
|
offscreenDT = gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
|
|
ToIntSize(neededRect.Size()), SurfaceFormat::B8G8R8A8);
|
|
if (!offscreenDT) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
ctx = new gfxContext(offscreenDT);
|
|
}
|
|
|
|
ctx->Translate(-neededRect.TopLeft());
|
|
|
|
nsRenderingContext tmpCtx;
|
|
tmpCtx.Init(mTargetFrame->PresContext()->DeviceContext(), ctx);
|
|
|
|
gfxMatrix m = GetUserSpaceToFilterSpaceTransform();
|
|
m.Invert();
|
|
gfxRect r = m.TransformBounds(neededRect);
|
|
r.RoundOut();
|
|
nsIntRect dirty;
|
|
if (!gfxUtils::GfxRectToIntRect(r, &dirty))
|
|
return NS_ERROR_FAILURE;
|
|
|
|
// SVG graphics paint to device space, so we need to set an initial device
|
|
// space to filter space transform on the gfxContext that SourceGraphic
|
|
// and SourceAlpha will paint to.
|
|
//
|
|
// (In theory it would be better to minimize error by having filtered SVG
|
|
// graphics temporarily paint to user space when painting the sources and
|
|
// only set a user space to filter space transform on the gfxContext
|
|
// (since that would eliminate the transform multiplications from user
|
|
// space to device space and back again). However, that would make the
|
|
// code more complex while being hard to get right without introducing
|
|
// subtle bugs, and in practice it probably makes no real difference.)
|
|
gfxMatrix deviceToFilterSpace = GetFilterSpaceToDeviceSpaceTransform().Invert();
|
|
tmpCtx.ThebesContext()->Multiply(deviceToFilterSpace);
|
|
mPaintCallback->Paint(&tmpCtx, mTargetFrame, &dirty, mTransformRoot);
|
|
|
|
RefPtr<SourceSurface> sourceGraphicSource;
|
|
|
|
if (offscreenSurface) {
|
|
sourceGraphicSource =
|
|
gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(aTargetDT, offscreenSurface);
|
|
} else {
|
|
sourceGraphicSource = offscreenDT->Snapshot();
|
|
}
|
|
|
|
mSourceGraphic.mSourceSurface = sourceGraphicSource;
|
|
mSourceGraphic.mSurfaceRect = ToIntRect(neededRect);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsFilterInstance::Render(gfxContext* aContext)
|
|
{
|
|
nsIntRect filterRect = mPostFilterDirtyRect.Intersect(mFilterSpaceBounds);
|
|
gfxMatrix ctm = GetFilterSpaceToDeviceSpaceTransform();
|
|
|
|
if (filterRect.IsEmpty() || ctm.IsSingular()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
Matrix oldDTMatrix;
|
|
nsRefPtr<gfxASurface> resultImage;
|
|
RefPtr<DrawTarget> dt;
|
|
if (aContext->IsCairo()) {
|
|
resultImage =
|
|
gfxPlatform::GetPlatform()->CreateOffscreenSurface(filterRect.Size().ToIntSize(),
|
|
gfxContentType::COLOR_ALPHA);
|
|
if (!resultImage || resultImage->CairoStatus())
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
// Create a Cairo DrawTarget around resultImage.
|
|
dt = gfxPlatform::GetPlatform()->CreateDrawTargetForSurface(
|
|
resultImage, ToIntSize(filterRect.Size()));
|
|
} else {
|
|
// When we have a DrawTarget-backed context, we can call DrawFilter
|
|
// directly on the target DrawTarget and don't need a temporary DT.
|
|
dt = aContext->GetDrawTarget();
|
|
oldDTMatrix = dt->GetTransform();
|
|
Matrix matrix = ToMatrix(ctm);
|
|
matrix.Translate(filterRect.x, filterRect.y);
|
|
dt->SetTransform(matrix * oldDTMatrix);
|
|
}
|
|
|
|
ComputeNeededBoxes();
|
|
|
|
nsresult rv = BuildSourceImage(resultImage, dt);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
rv = BuildSourcePaints(resultImage, dt);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
IntRect filterSpaceBounds = ToIntRect(mFilterSpaceBounds);
|
|
FilterDescription filter(mPrimitiveDescriptions, filterSpaceBounds);
|
|
|
|
FilterSupport::RenderFilterDescription(
|
|
dt, filter, ToRect(filterRect),
|
|
mSourceGraphic.mSourceSurface, mSourceGraphic.mSurfaceRect,
|
|
mFillPaint.mSourceSurface, mFillPaint.mSurfaceRect,
|
|
mStrokePaint.mSourceSurface, mStrokePaint.mSurfaceRect,
|
|
mInputImages);
|
|
|
|
if (resultImage) {
|
|
aContext->Save();
|
|
aContext->Multiply(ctm);
|
|
aContext->Translate(filterRect.TopLeft());
|
|
aContext->SetSource(resultImage);
|
|
aContext->Paint();
|
|
aContext->Restore();
|
|
} else {
|
|
dt->SetTransform(oldDTMatrix);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsFilterInstance::ComputePostFilterDirtyRect(nsRect* aPostFilterDirtyRect)
|
|
{
|
|
*aPostFilterDirtyRect = nsRect();
|
|
if (mPreFilterDirtyRect.IsEmpty()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
IntRect filterSpaceBounds = ToIntRect(mFilterSpaceBounds);
|
|
FilterDescription filter(mPrimitiveDescriptions, filterSpaceBounds);
|
|
nsIntRegion resultChangeRegion =
|
|
FilterSupport::ComputeResultChangeRegion(filter,
|
|
mPreFilterDirtyRect, nsIntRegion(), nsIntRegion());
|
|
*aPostFilterDirtyRect =
|
|
FilterSpaceToFrameSpace(resultChangeRegion.GetBounds());
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsFilterInstance::ComputePostFilterExtents(nsRect* aPostFilterExtents)
|
|
{
|
|
*aPostFilterExtents = nsRect();
|
|
|
|
nsIntRect sourceBoundsInt;
|
|
gfxRect sourceBounds = UserSpaceToFilterSpace(mTargetBBox);
|
|
sourceBounds.RoundOut();
|
|
// Detect possible float->int overflow
|
|
if (!gfxUtils::GfxRectToIntRect(sourceBounds, &sourceBoundsInt))
|
|
return NS_ERROR_FAILURE;
|
|
sourceBoundsInt.UnionRect(sourceBoundsInt, mTargetBounds);
|
|
|
|
IntRect filterSpaceBounds = ToIntRect(mFilterSpaceBounds);
|
|
FilterDescription filter(mPrimitiveDescriptions, filterSpaceBounds);
|
|
nsIntRegion postFilterExtents =
|
|
FilterSupport::ComputePostFilterExtents(filter, sourceBoundsInt);
|
|
*aPostFilterExtents = FilterSpaceToFrameSpace(postFilterExtents.GetBounds());
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsFilterInstance::ComputeSourceNeededRect(nsRect* aDirty)
|
|
{
|
|
ComputeNeededBoxes();
|
|
*aDirty = FilterSpaceToFrameSpace(mSourceGraphic.mNeededBounds);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIntRect
|
|
nsFilterInstance::FrameSpaceToFilterSpace(const nsRect* aRect) const
|
|
{
|
|
nsIntRect rect = mFilterSpaceBounds;
|
|
if (aRect) {
|
|
if (aRect->IsEmpty()) {
|
|
return nsIntRect();
|
|
}
|
|
gfxRect rectInCSSPx =
|
|
nsLayoutUtils::RectToGfxRect(*aRect, mAppUnitsPerCSSPx);
|
|
gfxRect rectInFilterSpace =
|
|
mFrameSpaceInCSSPxToFilterSpaceTransform.TransformBounds(rectInCSSPx);
|
|
rectInFilterSpace.RoundOut();
|
|
nsIntRect intRect;
|
|
if (gfxUtils::GfxRectToIntRect(rectInFilterSpace, &intRect)) {
|
|
rect = intRect;
|
|
}
|
|
}
|
|
return rect;
|
|
}
|
|
|
|
nsRect
|
|
nsFilterInstance::FilterSpaceToFrameSpace(const nsIntRect& aRect) const
|
|
{
|
|
if (aRect.IsEmpty()) {
|
|
return nsRect();
|
|
}
|
|
gfxRect r(aRect.x, aRect.y, aRect.width, aRect.height);
|
|
r = mFilterSpaceToFrameSpaceInCSSPxTransform.TransformBounds(r);
|
|
return nsLayoutUtils::RoundGfxRectToAppRect(r, mAppUnitsPerCSSPx);
|
|
}
|
|
|
|
gfxMatrix
|
|
nsFilterInstance::GetUserSpaceToFrameSpaceInCSSPxTransform() const
|
|
{
|
|
gfxMatrix userToFrameSpaceInCSSPx;
|
|
|
|
if ((mTargetFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT)) {
|
|
// As currently implemented by Mozilla for the purposes of filters, user
|
|
// space is the coordinate system established by GetCanvasTM(), since
|
|
// that's what we use to set filterToDeviceSpace above. In other words,
|
|
// for SVG, user space is actually the coordinate system aTarget
|
|
// establishes for _its_ children (i.e. after taking account of any x/y
|
|
// and viewBox attributes), not the coordinate system that is established
|
|
// for it by its 'transform' attribute (or by its _parent_) as it's
|
|
// normally defined. (XXX We should think about fixing this.) The only
|
|
// frame type for which these extra transforms are not simply an x/y
|
|
// translation is nsSVGInnerSVGFrame, hence we treat it specially here.
|
|
if (mTargetFrame->GetType() == nsGkAtoms::svgInnerSVGFrame) {
|
|
userToFrameSpaceInCSSPx =
|
|
static_cast<nsSVGElement*>(mTargetFrame->GetContent())->
|
|
PrependLocalTransformsTo(gfxMatrix());
|
|
} else {
|
|
gfxPoint targetsUserSpaceOffset =
|
|
nsLayoutUtils::RectToGfxRect(mTargetFrame->GetRect(),
|
|
mAppUnitsPerCSSPx).TopLeft();
|
|
userToFrameSpaceInCSSPx.Translate(-targetsUserSpaceOffset);
|
|
}
|
|
}
|
|
// else, for all other frames, leave as the identity matrix
|
|
return userToFrameSpaceInCSSPx;
|
|
}
|