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gecko/gfx/2d/DrawTargetSkia.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 "DrawTargetSkia.h"
#include "SourceSurfaceSkia.h"
#include "ScaledFontBase.h"
#include "ScaledFontCairo.h"
#include "skia/include/core/SkBitmapDevice.h"
#include "FilterNodeSoftware.h"
#include "HelpersSkia.h"
#include "skia/include/core/SkSurface.h"
#include "skia/include/core/SkTypeface.h"
#include "skia/include/effects/SkGradientShader.h"
#include "skia/include/core/SkColorFilter.h"
#include "skia/include/effects/SkBlurImageFilter.h"
#include "skia/include/effects/SkLayerRasterizer.h"
#include "Logging.h"
#include "Tools.h"
#include "DataSurfaceHelpers.h"
#include <algorithm>
#ifdef USE_SKIA_GPU
#include "GLDefs.h"
#include "skia/include/gpu/SkGr.h"
#include "skia/include/gpu/GrContext.h"
#include "skia/include/gpu/gl/GrGLInterface.h"
#endif
namespace mozilla {
namespace gfx {
class GradientStopsSkia : public GradientStops
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GradientStopsSkia)
GradientStopsSkia(const std::vector<GradientStop>& aStops, uint32_t aNumStops, ExtendMode aExtendMode)
: mCount(aNumStops)
, mExtendMode(aExtendMode)
{
if (mCount == 0) {
return;
}
// Skia gradients always require a stop at 0.0 and 1.0, insert these if
// we don't have them.
uint32_t shift = 0;
if (aStops[0].offset != 0) {
mCount++;
shift = 1;
}
if (aStops[aNumStops-1].offset != 1) {
mCount++;
}
mColors.resize(mCount);
mPositions.resize(mCount);
if (aStops[0].offset != 0) {
mColors[0] = ColorToSkColor(aStops[0].color, 1.0);
mPositions[0] = 0;
}
for (uint32_t i = 0; i < aNumStops; i++) {
mColors[i + shift] = ColorToSkColor(aStops[i].color, 1.0);
mPositions[i + shift] = SkFloatToScalar(aStops[i].offset);
}
if (aStops[aNumStops-1].offset != 1) {
mColors[mCount-1] = ColorToSkColor(aStops[aNumStops-1].color, 1.0);
mPositions[mCount-1] = SK_Scalar1;
}
}
BackendType GetBackendType() const { return BackendType::SKIA; }
std::vector<SkColor> mColors;
std::vector<SkScalar> mPositions;
int mCount;
ExtendMode mExtendMode;
};
/**
* When constructing a temporary SkBitmap via GetBitmapForSurface, we may also
* have to construct a temporary DataSourceSurface, which must live as long as
* the SkBitmap. We attach this temporary surface to the bitmap's pixelref, so
* that it can be released once the pixelref is freed.
*/
static void
ReleaseTemporarySurface(void* aPixels, void* aContext)
{
DataSourceSurface* surf = static_cast<DataSourceSurface*>(aContext);
if (surf) {
surf->Release();
}
}
static SkBitmap
GetBitmapForSurface(SourceSurface* aSurface)
{
SkBitmap bitmap;
if (aSurface->GetType() == SurfaceType::SKIA) {
bitmap = static_cast<SourceSurfaceSkia*>(aSurface)->GetBitmap();
return bitmap;
}
DataSourceSurface* surf = aSurface->GetDataSurface().take();
if (!surf) {
gfxDevCrash(LogReason::SourceSurfaceIncompatible) << "Non-Skia SourceSurfaces need to be DataSourceSurfaces";
return bitmap;
}
if (!bitmap.installPixels(MakeSkiaImageInfo(surf->GetSize(), surf->GetFormat()),
surf->GetData(), surf->Stride(), nullptr,
ReleaseTemporarySurface, surf)) {
gfxDebug() << "Failed installing pixels on Skia bitmap for temporary surface";
}
return bitmap;
}
DrawTargetSkia::DrawTargetSkia()
: mSnapshot(nullptr)
{
}
DrawTargetSkia::~DrawTargetSkia()
{
}
already_AddRefed<SourceSurface>
DrawTargetSkia::Snapshot()
{
RefPtr<SourceSurfaceSkia> snapshot = mSnapshot;
if (!snapshot) {
snapshot = new SourceSurfaceSkia();
mSnapshot = snapshot;
if (!snapshot->InitFromCanvas(mCanvas.get(), mFormat, this))
return nullptr;
}
return snapshot.forget();
}
bool
DrawTargetSkia::LockBits(uint8_t** aData, IntSize* aSize,
int32_t* aStride, SurfaceFormat* aFormat,
IntPoint* aOrigin)
{
// Ensure the layer is at the origin if required.
SkIPoint origin = mCanvas->getTopDevice()->getOrigin();
if (!aOrigin && !origin.isZero()) {
return false;
}
/* Test if the canvas' device has accessible pixels first, as actually
* accessing the pixels may trigger side-effects, even if it fails.
*/
if (!mCanvas->peekPixels(nullptr, nullptr)) {
return false;
}
SkImageInfo info;
size_t rowBytes;
void* pixels = mCanvas->accessTopLayerPixels(&info, &rowBytes);
if (!pixels) {
return false;
}
MarkChanged();
*aData = reinterpret_cast<uint8_t*>(pixels);
*aSize = IntSize(info.width(), info.height());
*aStride = int32_t(rowBytes);
*aFormat = SkiaColorTypeToGfxFormat(info.colorType());
if (aOrigin) {
*aOrigin = IntPoint(origin.x(), origin.y());
}
return true;
}
void
DrawTargetSkia::ReleaseBits(uint8_t* aData)
{
}
static void
SetPaintPattern(SkPaint& aPaint, const Pattern& aPattern, Float aAlpha = 1.0)
{
switch (aPattern.GetType()) {
case PatternType::COLOR: {
Color color = static_cast<const ColorPattern&>(aPattern).mColor;
aPaint.setColor(ColorToSkColor(color, aAlpha));
break;
}
case PatternType::LINEAR_GRADIENT: {
const LinearGradientPattern& pat = static_cast<const LinearGradientPattern&>(aPattern);
GradientStopsSkia *stops = static_cast<GradientStopsSkia*>(pat.mStops.get());
SkShader::TileMode mode = ExtendModeToTileMode(stops->mExtendMode, Axis::BOTH);
if (stops->mCount >= 2) {
SkPoint points[2];
points[0] = SkPoint::Make(SkFloatToScalar(pat.mBegin.x), SkFloatToScalar(pat.mBegin.y));
points[1] = SkPoint::Make(SkFloatToScalar(pat.mEnd.x), SkFloatToScalar(pat.mEnd.y));
SkMatrix mat;
GfxMatrixToSkiaMatrix(pat.mMatrix, mat);
SkShader* shader = SkGradientShader::CreateLinear(points,
&stops->mColors.front(),
&stops->mPositions.front(),
stops->mCount,
mode, 0, &mat);
SkSafeUnref(aPaint.setShader(shader));
} else {
aPaint.setColor(SK_ColorTRANSPARENT);
}
break;
}
case PatternType::RADIAL_GRADIENT: {
const RadialGradientPattern& pat = static_cast<const RadialGradientPattern&>(aPattern);
GradientStopsSkia *stops = static_cast<GradientStopsSkia*>(pat.mStops.get());
SkShader::TileMode mode = ExtendModeToTileMode(stops->mExtendMode, Axis::BOTH);
if (stops->mCount >= 2) {
SkPoint points[2];
points[0] = SkPoint::Make(SkFloatToScalar(pat.mCenter1.x), SkFloatToScalar(pat.mCenter1.y));
points[1] = SkPoint::Make(SkFloatToScalar(pat.mCenter2.x), SkFloatToScalar(pat.mCenter2.y));
SkMatrix mat;
GfxMatrixToSkiaMatrix(pat.mMatrix, mat);
SkShader* shader = SkGradientShader::CreateTwoPointConical(points[0],
SkFloatToScalar(pat.mRadius1),
points[1],
SkFloatToScalar(pat.mRadius2),
&stops->mColors.front(),
&stops->mPositions.front(),
stops->mCount,
mode, 0, &mat);
SkSafeUnref(aPaint.setShader(shader));
} else {
aPaint.setColor(SK_ColorTRANSPARENT);
}
break;
}
case PatternType::SURFACE: {
const SurfacePattern& pat = static_cast<const SurfacePattern&>(aPattern);
SkBitmap bitmap = GetBitmapForSurface(pat.mSurface);
SkMatrix mat;
GfxMatrixToSkiaMatrix(pat.mMatrix, mat);
if (!pat.mSamplingRect.IsEmpty()) {
SkIRect rect = IntRectToSkIRect(pat.mSamplingRect);
bitmap.extractSubset(&bitmap, rect);
mat.preTranslate(rect.x(), rect.y());
}
SkShader::TileMode xTileMode = ExtendModeToTileMode(pat.mExtendMode, Axis::X_AXIS);
SkShader::TileMode yTileMode = ExtendModeToTileMode(pat.mExtendMode, Axis::Y_AXIS);
SkShader* shader = SkShader::CreateBitmapShader(bitmap, xTileMode, yTileMode, &mat);
SkSafeUnref(aPaint.setShader(shader));
if (pat.mFilter == Filter::POINT) {
aPaint.setFilterQuality(kNone_SkFilterQuality);
}
break;
}
}
}
static inline Rect
GetClipBounds(SkCanvas *aCanvas)
{
SkRect clipBounds;
aCanvas->getClipBounds(&clipBounds);
return SkRectToRect(clipBounds);
}
struct AutoPaintSetup {
AutoPaintSetup(SkCanvas *aCanvas, const DrawOptions& aOptions, const Pattern& aPattern, const Rect* aMaskBounds = nullptr)
: mNeedsRestore(false), mAlpha(1.0)
{
Init(aCanvas, aOptions, aMaskBounds);
SetPaintPattern(mPaint, aPattern, mAlpha);
}
AutoPaintSetup(SkCanvas *aCanvas, const DrawOptions& aOptions, const Rect* aMaskBounds = nullptr)
: mNeedsRestore(false), mAlpha(1.0)
{
Init(aCanvas, aOptions, aMaskBounds);
}
~AutoPaintSetup()
{
if (mNeedsRestore) {
mCanvas->restore();
}
}
void Init(SkCanvas *aCanvas, const DrawOptions& aOptions, const Rect* aMaskBounds)
{
mPaint.setXfermodeMode(GfxOpToSkiaOp(aOptions.mCompositionOp));
mCanvas = aCanvas;
//TODO: Can we set greyscale somehow?
if (aOptions.mAntialiasMode != AntialiasMode::NONE) {
mPaint.setAntiAlias(true);
} else {
mPaint.setAntiAlias(false);
}
Rect clipBounds = GetClipBounds(aCanvas);
bool needsGroup = !IsOperatorBoundByMask(aOptions.mCompositionOp) &&
(!aMaskBounds || !aMaskBounds->Contains(clipBounds));
// TODO: We could skip the temporary for operator_source and just
// clear the clip rect. The other operators would be harder
// but could be worth it to skip pushing a group.
if (needsGroup) {
mPaint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
SkPaint temp;
temp.setXfermodeMode(GfxOpToSkiaOp(aOptions.mCompositionOp));
temp.setAlpha(ColorFloatToByte(aOptions.mAlpha));
//TODO: Get a rect here
mCanvas->saveLayer(nullptr, &temp);
mNeedsRestore = true;
} else {
mPaint.setAlpha(ColorFloatToByte(aOptions.mAlpha));
mAlpha = aOptions.mAlpha;
}
mPaint.setFilterQuality(kLow_SkFilterQuality);
}
// TODO: Maybe add an operator overload to access this easier?
SkPaint mPaint;
bool mNeedsRestore;
SkCanvas* mCanvas;
Float mAlpha;
};
void
DrawTargetSkia::Flush()
{
mCanvas->flush();
}
void
DrawTargetSkia::DrawSurface(SourceSurface *aSurface,
const Rect &aDest,
const Rect &aSource,
const DrawSurfaceOptions &aSurfOptions,
const DrawOptions &aOptions)
{
RefPtr<SourceSurface> dataSurface;
if (!(aSurface->GetType() == SurfaceType::SKIA || aSurface->GetType() == SurfaceType::DATA)) {
dataSurface = aSurface->GetDataSurface();
if (!dataSurface) {
gfxDebug() << *this << ": DrawSurface() can't draw surface";
return;
}
aSurface = dataSurface.get();
}
if (aSource.IsEmpty()) {
return;
}
MarkChanged();
SkRect destRect = RectToSkRect(aDest);
SkRect sourceRect = RectToSkRect(aSource);
SkBitmap bitmap = GetBitmapForSurface(aSurface);
AutoPaintSetup paint(mCanvas.get(), aOptions, &aDest);
if (aSurfOptions.mFilter == Filter::POINT) {
paint.mPaint.setFilterQuality(kNone_SkFilterQuality);
}
mCanvas->drawBitmapRect(bitmap, sourceRect, destRect, &paint.mPaint);
}
DrawTargetType
DrawTargetSkia::GetType() const
{
#ifdef USE_SKIA_GPU
if (mGrContext) {
return DrawTargetType::HARDWARE_RASTER;
}
#endif
return DrawTargetType::SOFTWARE_RASTER;
}
void
DrawTargetSkia::DrawFilter(FilterNode *aNode,
const Rect &aSourceRect,
const Point &aDestPoint,
const DrawOptions &aOptions)
{
FilterNodeSoftware* filter = static_cast<FilterNodeSoftware*>(aNode);
filter->Draw(this, aSourceRect, aDestPoint, aOptions);
}
void
DrawTargetSkia::DrawSurfaceWithShadow(SourceSurface *aSurface,
const Point &aDest,
const Color &aColor,
const Point &aOffset,
Float aSigma,
CompositionOp aOperator)
{
if (!(aSurface->GetType() == SurfaceType::SKIA || aSurface->GetType() == SurfaceType::DATA)) {
return;
}
MarkChanged();
mCanvas->save();
mCanvas->resetMatrix();
SkBitmap bitmap = GetBitmapForSurface(aSurface);
SkPaint paint;
paint.setXfermodeMode(GfxOpToSkiaOp(aOperator));
// bug 1201272
// We can't use the SkDropShadowImageFilter here because it applies the xfer
// mode first to render the bitmap to a temporary layer, and then implicitly
// uses src-over to composite the resulting shadow.
// The canvas spec, however, states that the composite op must be used to
// composite the resulting shadow, so we must instead use a SkBlurImageFilter
// to blur the image ourselves.
SkPaint shadowPaint;
SkAutoTUnref<SkImageFilter> blurFilter(SkBlurImageFilter::Create(aSigma, aSigma));
SkAutoTUnref<SkColorFilter> colorFilter(
SkColorFilter::CreateModeFilter(ColorToSkColor(aColor, 1.0), SkXfermode::kSrcIn_Mode));
shadowPaint.setXfermode(paint.getXfermode());
shadowPaint.setImageFilter(blurFilter.get());
shadowPaint.setColorFilter(colorFilter.get());
// drawBitmap implicitly calls saveLayer with a src-over xfer mode if given
// an image filter, whereas the supplied xfer mode gets used to render into
// the layer, which is the wrong order. We instead must use drawSprite which
// applies the image filter directly to the bitmap without rendering it first,
// then uses the xfer mode to composite it.
IntPoint shadowDest = RoundedToInt(aDest + aOffset);
mCanvas->drawSprite(bitmap, shadowDest.x, shadowDest.y, &shadowPaint);
// Composite the original image after the shadow
IntPoint dest = RoundedToInt(aDest);
mCanvas->drawSprite(bitmap, dest.x, dest.y, &paint);
mCanvas->restore();
}
void
DrawTargetSkia::FillRect(const Rect &aRect,
const Pattern &aPattern,
const DrawOptions &aOptions)
{
MarkChanged();
SkRect rect = RectToSkRect(aRect);
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern, &aRect);
mCanvas->drawRect(rect, paint.mPaint);
}
void
DrawTargetSkia::Stroke(const Path *aPath,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions,
const DrawOptions &aOptions)
{
MarkChanged();
MOZ_ASSERT(aPath, "Null path");
if (aPath->GetBackendType() != BackendType::SKIA) {
return;
}
const PathSkia *skiaPath = static_cast<const PathSkia*>(aPath);
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
if (!StrokeOptionsToPaint(paint.mPaint, aStrokeOptions)) {
return;
}
if (!skiaPath->GetPath().isFinite()) {
return;
}
mCanvas->drawPath(skiaPath->GetPath(), paint.mPaint);
}
void
DrawTargetSkia::StrokeRect(const Rect &aRect,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions,
const DrawOptions &aOptions)
{
MarkChanged();
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
if (!StrokeOptionsToPaint(paint.mPaint, aStrokeOptions)) {
return;
}
mCanvas->drawRect(RectToSkRect(aRect), paint.mPaint);
}
void
DrawTargetSkia::StrokeLine(const Point &aStart,
const Point &aEnd,
const Pattern &aPattern,
const StrokeOptions &aStrokeOptions,
const DrawOptions &aOptions)
{
MarkChanged();
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
if (!StrokeOptionsToPaint(paint.mPaint, aStrokeOptions)) {
return;
}
mCanvas->drawLine(SkFloatToScalar(aStart.x), SkFloatToScalar(aStart.y),
SkFloatToScalar(aEnd.x), SkFloatToScalar(aEnd.y),
paint.mPaint);
}
void
DrawTargetSkia::Fill(const Path *aPath,
const Pattern &aPattern,
const DrawOptions &aOptions)
{
MarkChanged();
if (aPath->GetBackendType() != BackendType::SKIA) {
return;
}
const PathSkia *skiaPath = static_cast<const PathSkia*>(aPath);
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
if (!skiaPath->GetPath().isFinite()) {
return;
}
mCanvas->drawPath(skiaPath->GetPath(), paint.mPaint);
}
bool
DrawTargetSkia::ShouldLCDRenderText(FontType aFontType, AntialiasMode aAntialiasMode)
{
// For non-opaque surfaces, only allow subpixel AA if explicitly permitted.
if (!IsOpaque(mFormat) && !mPermitSubpixelAA) {
return false;
}
if (aAntialiasMode == AntialiasMode::DEFAULT) {
switch (aFontType) {
case FontType::MAC:
return true;
default:
// TODO: Figure out what to do for the other platforms.
return false;
}
}
return (aAntialiasMode == AntialiasMode::SUBPIXEL);
}
void
DrawTargetSkia::FillGlyphs(ScaledFont *aFont,
const GlyphBuffer &aBuffer,
const Pattern &aPattern,
const DrawOptions &aOptions,
const GlyphRenderingOptions *aRenderingOptions)
{
if (aFont->GetType() != FontType::MAC &&
aFont->GetType() != FontType::SKIA &&
aFont->GetType() != FontType::GDI &&
aFont->GetType() != FontType::DWRITE) {
return;
}
MarkChanged();
ScaledFontBase* skiaFont = static_cast<ScaledFontBase*>(aFont);
AutoPaintSetup paint(mCanvas.get(), aOptions, aPattern);
paint.mPaint.setTypeface(skiaFont->GetSkTypeface());
paint.mPaint.setTextSize(SkFloatToScalar(skiaFont->mSize));
paint.mPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
bool shouldLCDRenderText = ShouldLCDRenderText(aFont->GetType(), aOptions.mAntialiasMode);
paint.mPaint.setLCDRenderText(shouldLCDRenderText);
paint.mPaint.setSubpixelText(true);
if (aRenderingOptions && aRenderingOptions->GetType() == FontType::CAIRO) {
const GlyphRenderingOptionsCairo* cairoOptions =
static_cast<const GlyphRenderingOptionsCairo*>(aRenderingOptions);
paint.mPaint.setHinting(GfxHintingToSkiaHinting(cairoOptions->GetHinting()));
if (cairoOptions->GetAutoHinting()) {
paint.mPaint.setAutohinted(true);
}
if (cairoOptions->GetAntialiasMode() == AntialiasMode::NONE) {
paint.mPaint.setAntiAlias(false);
}
} else if (aFont->GetType() == FontType::MAC && shouldLCDRenderText) {
// SkFontHost_mac only supports subpixel antialiasing when hinting is turned off.
paint.mPaint.setHinting(SkPaint::kNo_Hinting);
} else {
paint.mPaint.setHinting(SkPaint::kNormal_Hinting);
}
std::vector<uint16_t> indices;
std::vector<SkPoint> offsets;
indices.resize(aBuffer.mNumGlyphs);
offsets.resize(aBuffer.mNumGlyphs);
for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
indices[i] = aBuffer.mGlyphs[i].mIndex;
offsets[i].fX = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.x);
offsets[i].fY = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.y);
}
mCanvas->drawPosText(&indices.front(), aBuffer.mNumGlyphs*2, &offsets.front(), paint.mPaint);
}
void
DrawTargetSkia::Mask(const Pattern &aSource,
const Pattern &aMask,
const DrawOptions &aOptions)
{
MarkChanged();
AutoPaintSetup paint(mCanvas.get(), aOptions, aSource);
SkPaint maskPaint;
SetPaintPattern(maskPaint, aMask);
SkLayerRasterizer::Builder builder;
builder.addLayer(maskPaint);
SkAutoTUnref<SkRasterizer> raster(builder.detachRasterizer());
paint.mPaint.setRasterizer(raster.get());
mCanvas->drawPaint(paint.mPaint);
}
void
DrawTargetSkia::MaskSurface(const Pattern &aSource,
SourceSurface *aMask,
Point aOffset,
const DrawOptions &aOptions)
{
MarkChanged();
AutoPaintSetup paint(mCanvas.get(), aOptions, aSource);
SkBitmap bitmap = GetBitmapForSurface(aMask);
if (bitmap.colorType() != kAlpha_8_SkColorType &&
!bitmap.extractAlpha(&bitmap)) {
gfxDebug() << *this << ": MaskSurface() failed to extract alpha for mask";
return;
}
if (aOffset != Point(0, 0)) {
SkMatrix transform;
transform.setTranslate(SkFloatToScalar(-aOffset.x), SkFloatToScalar(-aOffset.y));
SkShader* matrixShader = SkShader::CreateLocalMatrixShader(paint.mPaint.getShader(), transform);
SkSafeUnref(paint.mPaint.setShader(matrixShader));
}
mCanvas->drawBitmap(bitmap, aOffset.x, aOffset.y, &paint.mPaint);
}
already_AddRefed<SourceSurface>
DrawTargetSkia::CreateSourceSurfaceFromData(unsigned char *aData,
const IntSize &aSize,
int32_t aStride,
SurfaceFormat aFormat) const
{
RefPtr<SourceSurfaceSkia> newSurf = new SourceSurfaceSkia();
if (!newSurf->InitFromData(aData, aSize, aStride, aFormat)) {
gfxDebug() << *this << ": Failure to create source surface from data. Size: " << aSize;
return nullptr;
}
return newSurf.forget();
}
already_AddRefed<DrawTarget>
DrawTargetSkia::CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const
{
RefPtr<DrawTargetSkia> target = new DrawTargetSkia();
#ifdef USE_SKIA_GPU
if (UsingSkiaGPU()) {
// Try to create a GPU draw target first if we're currently using the GPU.
if (target->InitWithGrContext(mGrContext.get(), aSize, aFormat)) {
return target.forget();
}
// Otherwise, just fall back to a software draw target.
}
#endif
if (!target->Init(aSize, aFormat)) {
return nullptr;
}
return target.forget();
}
bool
DrawTargetSkia::UsingSkiaGPU() const
{
#ifdef USE_SKIA_GPU
return !!mGrContext;
#else
return false;
#endif
}
already_AddRefed<SourceSurface>
DrawTargetSkia::OptimizeSourceSurface(SourceSurface *aSurface) const
{
#ifdef USE_SKIA_GPU
if (UsingSkiaGPU()) {
// Check if the underlying SkBitmap already has an associated GrTexture.
if (aSurface->GetType() == SurfaceType::SKIA &&
static_cast<SourceSurfaceSkia*>(aSurface)->GetBitmap().getTexture()) {
RefPtr<SourceSurface> surface(aSurface);
return surface.forget();
}
// Upload the SkBitmap to a GrTexture otherwise.
SkAutoTUnref<GrTexture> texture(
GrRefCachedBitmapTexture(mGrContext.get(),
GetBitmapForSurface(aSurface),
GrTextureParams::ClampBilerp()));
// Create a new SourceSurfaceSkia whose SkBitmap contains the GrTexture.
RefPtr<SourceSurfaceSkia> surface = new SourceSurfaceSkia();
if (surface->InitFromGrTexture(texture, aSurface->GetSize(), aSurface->GetFormat())) {
return surface.forget();
}
}
#endif
if (aSurface->GetType() == SurfaceType::SKIA) {
RefPtr<SourceSurface> surface(aSurface);
return surface.forget();
}
// If we're not using skia-gl then drawing doesn't require any
// uploading, so any data surface is fine. Call GetDataSurface
// to trigger any required readback so that it only happens
// once.
return aSurface->GetDataSurface();
}
already_AddRefed<SourceSurface>
DrawTargetSkia::CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const
{
#if USE_SKIA_GPU
if (aSurface.mType == NativeSurfaceType::OPENGL_TEXTURE && UsingSkiaGPU()) {
// Wrap the OpenGL texture id in a Skia texture handle.
GrBackendTextureDesc texDesc;
texDesc.fWidth = aSurface.mSize.width;
texDesc.fHeight = aSurface.mSize.height;
texDesc.fOrigin = kTopLeft_GrSurfaceOrigin;
texDesc.fConfig = GfxFormatToGrConfig(aSurface.mFormat);
GrGLTextureInfo texInfo;
texInfo.fTarget = LOCAL_GL_TEXTURE_2D;
texInfo.fID = (GrGLuint)(uintptr_t)aSurface.mSurface;
texDesc.fTextureHandle = reinterpret_cast<GrBackendObject>(&texInfo);
SkAutoTUnref<GrTexture> texture(mGrContext->textureProvider()->wrapBackendTexture(texDesc));
RefPtr<SourceSurfaceSkia> newSurf = new SourceSurfaceSkia();
if (newSurf->InitFromGrTexture(texture, aSurface.mSize, aSurface.mFormat)) {
return newSurf.forget();
}
return nullptr;
}
#endif
return nullptr;
}
void
DrawTargetSkia::CopySurface(SourceSurface *aSurface,
const IntRect& aSourceRect,
const IntPoint &aDestination)
{
if (aSurface->GetType() != SurfaceType::SKIA && aSurface->GetType() != SurfaceType::DATA) {
return;
}
MarkChanged();
SkBitmap bitmap = GetBitmapForSurface(aSurface);
mCanvas->save();
mCanvas->resetMatrix();
SkRect dest = IntRectToSkRect(IntRect(aDestination.x, aDestination.y, aSourceRect.width, aSourceRect.height));
SkIRect source = IntRectToSkIRect(aSourceRect);
mCanvas->clipRect(dest, SkRegion::kReplace_Op);
SkPaint paint;
if (!bitmap.isOpaque()) {
// Keep the xfermode as SOURCE_OVER for opaque bitmaps
// http://code.google.com/p/skia/issues/detail?id=628
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
}
// drawBitmapRect with A8 bitmaps ends up doing a mask operation
// so we need to clear before
if (bitmap.colorType() == kAlpha_8_SkColorType) {
mCanvas->clear(SK_ColorTRANSPARENT);
}
mCanvas->drawBitmapRect(bitmap, source, dest, &paint);
mCanvas->restore();
}
bool
DrawTargetSkia::Init(const IntSize &aSize, SurfaceFormat aFormat)
{
if (size_t(std::max(aSize.width, aSize.height)) > GetMaxSurfaceSize()) {
return false;
}
// we need to have surfaces that have a stride aligned to 4 for interop with cairo
int stride = (BytesPerPixel(aFormat)*aSize.width + (4-1)) & -4;
SkBitmap bitmap;
bitmap.setInfo(MakeSkiaImageInfo(aSize, aFormat), stride);
if (!bitmap.tryAllocPixels()) {
return false;
}
bitmap.eraseColor(SK_ColorTRANSPARENT);
mCanvas.adopt(new SkCanvas(bitmap));
mSize = aSize;
mFormat = aFormat;
return true;
}
#ifdef USE_SKIA_GPU
bool
DrawTargetSkia::InitWithGrContext(GrContext* aGrContext,
const IntSize &aSize,
SurfaceFormat aFormat)
{
MOZ_ASSERT(aGrContext, "null GrContext");
if (size_t(std::max(aSize.width, aSize.height)) > GetMaxSurfaceSize()) {
return false;
}
// Create a GPU rendertarget/texture using the supplied GrContext.
// NewRenderTarget also implicitly clears the underlying texture on creation.
SkAutoTUnref<SkSurface> gpuSurface(SkSurface::NewRenderTarget(aGrContext, SkSurface::kNo_Budgeted, MakeSkiaImageInfo(aSize, aFormat)));
if (!gpuSurface) {
return false;
}
mGrContext = aGrContext;
mSize = aSize;
mFormat = aFormat;
mCanvas = gpuSurface->getCanvas();
return true;
}
#endif
void
DrawTargetSkia::Init(unsigned char* aData, const IntSize &aSize, int32_t aStride, SurfaceFormat aFormat)
{
if (aFormat == SurfaceFormat::B8G8R8X8) {
// We have to manually set the A channel to be 255 as Skia doesn't understand BGRX
ConvertBGRXToBGRA(aData, aSize, aStride);
}
SkBitmap bitmap;
bitmap.setInfo(MakeSkiaImageInfo(aSize, aFormat), aStride);
bitmap.setPixels(aData);
mCanvas.adopt(new SkCanvas(bitmap));
mSize = aSize;
mFormat = aFormat;
}
void
DrawTargetSkia::SetTransform(const Matrix& aTransform)
{
SkMatrix mat;
GfxMatrixToSkiaMatrix(aTransform, mat);
mCanvas->setMatrix(mat);
mTransform = aTransform;
}
void*
DrawTargetSkia::GetNativeSurface(NativeSurfaceType aType)
{
#ifdef USE_SKIA_GPU
if (aType == NativeSurfaceType::OPENGL_TEXTURE) {
// Get the current texture backing the GPU device.
// Beware - this texture is only guaranteed to valid after a draw target flush.
GrRenderTarget* rt = mCanvas->getDevice()->accessRenderTarget();
if (rt) {
GrTexture* tex = rt->asTexture();
if (tex) {
return (void*)(uintptr_t)reinterpret_cast<GrGLTextureInfo *>(tex->getTextureHandle())->fID;
}
}
}
#endif
return nullptr;
}
already_AddRefed<PathBuilder>
DrawTargetSkia::CreatePathBuilder(FillRule aFillRule) const
{
return MakeAndAddRef<PathBuilderSkia>(aFillRule);
}
void
DrawTargetSkia::ClearRect(const Rect &aRect)
{
MarkChanged();
mCanvas->save();
mCanvas->clipRect(RectToSkRect(aRect), SkRegion::kIntersect_Op, true);
mCanvas->clear(SK_ColorTRANSPARENT);
mCanvas->restore();
}
void
DrawTargetSkia::PushClip(const Path *aPath)
{
if (aPath->GetBackendType() != BackendType::SKIA) {
return;
}
const PathSkia *skiaPath = static_cast<const PathSkia*>(aPath);
mCanvas->save();
mCanvas->clipPath(skiaPath->GetPath(), SkRegion::kIntersect_Op, true);
}
void
DrawTargetSkia::PushClipRect(const Rect& aRect)
{
SkRect rect = RectToSkRect(aRect);
mCanvas->save();
mCanvas->clipRect(rect, SkRegion::kIntersect_Op, true);
}
void
DrawTargetSkia::PopClip()
{
mCanvas->restore();
}
void
DrawTargetSkia::PushLayer(bool aOpaque, Float aOpacity, SourceSurface* aMask,
const Matrix& aMaskTransform, const IntRect& aBounds,
bool aCopyBackground)
{
PushedLayer layer(GetPermitSubpixelAA(), aOpaque, aOpacity, aMask, aMaskTransform);
mPushedLayers.push_back(layer);
SkPaint paint;
// If we have a mask, set the opacity to 0 so that SkCanvas::restore skips
// implicitly drawing the layer so that we can properly mask it in PopLayer.
paint.setAlpha(aMask ? 0 : ColorFloatToByte(aOpacity));
SkRect bounds = IntRectToSkRect(aBounds);
SkRect* boundsPtr = aBounds.IsEmpty() ? nullptr : &bounds;
// TODO: Replace this with SaveLayerFlags when available in Skia update (m49+)
SkCanvas::SaveFlags saveFlags =
aOpaque ?
SkCanvas::SaveFlags(SkCanvas::kARGB_ClipLayer_SaveFlag & ~SkCanvas::kHasAlphaLayer_SaveFlag) :
SkCanvas::kARGB_ClipLayer_SaveFlag;
if (aCopyBackground) {
// Get a reference to the background before we save the layer.
SkAutoTUnref<SkBaseDevice> bgDevice(SkSafeRef(mCanvas->getTopDevice()));
SkIPoint bgOrigin = bgDevice->getOrigin();
SkBitmap bgBitmap = bgDevice->accessBitmap(false);
mCanvas->saveLayer(boundsPtr, &paint, saveFlags);
// Draw the background into the layer.
SkPaint bgPaint;
if (!bgBitmap.isOpaque()) {
bgPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
}
mCanvas->save();
mCanvas->resetMatrix();
mCanvas->drawBitmap(bgBitmap, bgOrigin.x(), bgOrigin.y(), &bgPaint);
mCanvas->restore();
} else {
mCanvas->saveLayer(boundsPtr, &paint, saveFlags);
}
SetPermitSubpixelAA(aOpaque);
}
void
DrawTargetSkia::PopLayer()
{
MarkChanged();
MOZ_ASSERT(mPushedLayers.size());
const PushedLayer& layer = mPushedLayers.back();
if (layer.mMask) {
// If we have a mask, take a reference to the layer's bitmap device so that
// we can mask it ourselves. This assumes we forced SkCanvas::restore to
// skip implicitly drawing the layer.
SkAutoTUnref<SkBaseDevice> layerDevice(SkSafeRef(mCanvas->getTopDevice()));
SkIRect layerBounds = layerDevice->getGlobalBounds();
SkBitmap layerBitmap = layerDevice->accessBitmap(false);
// Restore the background with the layer's device left alive.
mCanvas->restore();
SkPaint paint;
paint.setAlpha(ColorFloatToByte(layer.mOpacity));
SkMatrix maskMat, layerMat;
// Get the total transform affecting the mask, considering its pattern
// transform and the current canvas transform.
GfxMatrixToSkiaMatrix(layer.mMaskTransform, maskMat);
maskMat.postConcat(mCanvas->getTotalMatrix());
if (!maskMat.invert(&layerMat)) {
gfxDebug() << *this << ": PopLayer() failed to invert mask transform";
} else {
// The layer should not be affected by the current canvas transform,
// even though the mask is. So first we use the inverse of the transform
// affecting the mask, then add back on the layer's origin.
layerMat.preTranslate(layerBounds.x(), layerBounds.y());
SkShader* shader = SkShader::CreateBitmapShader(layerBitmap,
SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode,
&layerMat);
SkSafeUnref(paint.setShader(shader));
SkBitmap mask = GetBitmapForSurface(layer.mMask);
if (mask.colorType() != kAlpha_8_SkColorType &&
!mask.extractAlpha(&mask)) {
gfxDebug() << *this << ": PopLayer() failed to extract alpha for mask";
} else {
mCanvas->save();
// The layer may be smaller than the canvas size, so make sure drawing is
// clipped to within the bounds of the layer.
mCanvas->resetMatrix();
mCanvas->clipRect(SkRect::Make(layerBounds));
mCanvas->setMatrix(maskMat);
mCanvas->drawBitmap(mask, 0, 0, &paint);
mCanvas->restore();
}
}
} else {
mCanvas->restore();
}
SetPermitSubpixelAA(layer.mOldPermitSubpixelAA);
mPushedLayers.pop_back();
}
already_AddRefed<GradientStops>
DrawTargetSkia::CreateGradientStops(GradientStop *aStops, uint32_t aNumStops, ExtendMode aExtendMode) const
{
std::vector<GradientStop> stops;
stops.resize(aNumStops);
for (uint32_t i = 0; i < aNumStops; i++) {
stops[i] = aStops[i];
}
std::stable_sort(stops.begin(), stops.end());
return MakeAndAddRef<GradientStopsSkia>(stops, aNumStops, aExtendMode);
}
already_AddRefed<FilterNode>
DrawTargetSkia::CreateFilter(FilterType aType)
{
return FilterNodeSoftware::Create(aType);
}
void
DrawTargetSkia::MarkChanged()
{
if (mSnapshot) {
mSnapshot->DrawTargetWillChange();
mSnapshot = nullptr;
}
}
void
DrawTargetSkia::SnapshotDestroyed()
{
mSnapshot = nullptr;
}
} // namespace gfx
} // namespace mozilla
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