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gecko-dev/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 "SourceSurfaceCairo.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>
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;
}
SkAlphaType alphaType = (surf->GetFormat() == SurfaceFormat::B8G8R8X8) ?
kOpaque_SkAlphaType : kPremul_SkAlphaType;
SkImageInfo info = SkImageInfo::Make(surf->GetSize().width,
surf->GetSize().height,
GfxFormatToSkiaColorType(surf->GetFormat()),
alphaType);
if (!bitmap.installPixels(info, surf->GetData(), surf->Stride(), nullptr,
ReleaseTemporarySurface, surf)) {
gfxDebug() << "Failed installing pixels on Skia bitmap for temporary surface";
}
return bitmap;
}
DrawTargetSkia::DrawTargetSkia()
:
#ifdef USE_SKIA_GPU
mTexture(0),
#endif
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)
{
/* 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());
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));
SkShader* shader = SkGradientShader::CreateLinear(points,
&stops->mColors.front(),
&stops->mPositions.front(),
stops->mCount,
mode);
if (shader) {
SkMatrix mat;
GfxMatrixToSkiaMatrix(pat.mMatrix, mat);
SkShader* matrixShader = SkShader::CreateLocalMatrixShader(shader, mat);
SkSafeUnref(shader);
SkSafeUnref(aPaint.setShader(matrixShader));
}
} else {
aPaint.setColor(SkColorSetARGB(0, 0, 0, 0));
}
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));
SkShader* shader = SkGradientShader::CreateTwoPointConical(points[0],
SkFloatToScalar(pat.mRadius1),
points[1],
SkFloatToScalar(pat.mRadius2),
&stops->mColors.front(),
&stops->mPositions.front(),
stops->mCount,
mode);
if (shader) {
SkMatrix mat;
GfxMatrixToSkiaMatrix(pat.mMatrix, mat);
SkShader* matrixShader = SkShader::CreateLocalMatrixShader(shader, mat);
SkSafeUnref(shader);
SkSafeUnref(aPaint.setShader(matrixShader));
}
} else {
aPaint.setColor(SkColorSetARGB(0, 0, 0, 0));
}
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);
SkShader* matrixShader = SkShader::CreateLocalMatrixShader(shader, mat);
SkSafeUnref(shader);
SkSafeUnref(aPaint.setShader(matrixShader));
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->drawRect(SkRectCoveringWholeSurface(), 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) {
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);
} else {
SkPaint maskPaint;
SetPaintPattern(maskPaint,
SurfacePattern(aMask, ExtendMode::CLAMP, Matrix::Translation(aOffset)));
SkLayerRasterizer::Builder builder;
builder.addLayer(maskPaint);
SkAutoTUnref<SkRasterizer> raster(builder.detachRasterizer());
paint.mPaint.setRasterizer(raster.get());
IntSize size = aMask->GetSize();
Rect rect = Rect(aOffset.x, aOffset.y, size.width, size.height);
mCanvas->drawRect(RectToSkRect(rect), 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();
if (!target->Init(aSize, aFormat)) {
return nullptr;
}
return target.forget();
}
bool
DrawTargetSkia::UsingSkiaGPU() const
{
#ifdef USE_SKIA_GPU
return !!mTexture;
#else
return false;
#endif
}
already_AddRefed<SourceSurface>
DrawTargetSkia::OptimizeSourceSurface(SourceSurface *aSurface) const
{
if (aSurface->GetType() == SurfaceType::SKIA) {
RefPtr<SourceSurface> surface(aSurface);
return surface.forget();
}
if (!UsingSkiaGPU()) {
// 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();
}
// If we are using skia-gl then we want to copy into a surface that
// will cache the uploaded gl texture.
RefPtr<DataSourceSurface> dataSurf = aSurface->GetDataSurface();
DataSourceSurface::MappedSurface map;
if (!dataSurf->Map(DataSourceSurface::READ, &map)) {
return nullptr;
}
RefPtr<SourceSurface> result = CreateSourceSurfaceFromData(map.mData,
dataSurf->GetSize(),
map.mStride,
dataSurf->GetFormat());
dataSurf->Unmap();
return result.forget();
}
already_AddRefed<SourceSurface>
DrawTargetSkia::CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const
{
if (aSurface.mType == NativeSurfaceType::CAIRO_CONTEXT) {
if (aSurface.mSize.width <= 0 ||
aSurface.mSize.height <= 0) {
gfxWarning() << "Can't create a SourceSurface without a valid size";
return nullptr;
}
cairo_surface_t* surf = static_cast<cairo_surface_t*>(aSurface.mSurface);
return MakeAndAddRef<SourceSurfaceCairo>(surf, aSurface.mSize, aSurface.mFormat);
#if USE_SKIA_GPU
} else if (aSurface.mType == NativeSurfaceType::OPENGL_TEXTURE && UsingSkiaGPU()) {
RefPtr<SourceSurfaceSkia> newSurf = new SourceSurfaceSkia();
unsigned int texture = (unsigned int)((uintptr_t)aSurface.mSurface);
if (newSurf->InitFromTexture((DrawTargetSkia*)this, texture, aSurface.mSize, aSurface.mFormat)) {
return newSurf.forget();
}
return nullptr;
#endif
}
return nullptr;
}
void
DrawTargetSkia::CopySurface(SourceSurface *aSurface,
const IntRect& aSourceRect,
const IntPoint &aDestination)
{
//TODO: We could just use writePixels() here if the sourceRect is the entire source
if (aSurface->GetType() != SurfaceType::SKIA && aSurface->GetType() != SurfaceType::DATA) {
return;
}
MarkChanged();
SkBitmap bitmap = GetBitmapForSurface(aSurface);
// This is a fast path that is disabled for now to mimimize risk
if (false && !bitmap.getTexture() && mCanvas->imageInfo() == bitmap.info()) {
SkBitmap bm(bitmap);
bm.lockPixels();
if (bm.getPixels()) {
SkImageInfo info = bm.info().makeWH(aSourceRect.width, aSourceRect.height);
uint8_t* pixels = static_cast<uint8_t*>(bm.getPixels());
// adjust pixels for the source offset
pixels += aSourceRect.x + aSourceRect.y*bm.rowBytes();
mCanvas->writePixels(info, pixels, bm.rowBytes(), aDestination.x, aDestination.y);
return;
}
}
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 (mCanvas->imageInfo().colorType() == kRGB_565_SkColorType) {
// Set the xfermode to SOURCE_OVER to workaround
// http://code.google.com/p/skia/issues/detail?id=628
// RGB565 is opaque so they're equivalent anyway
paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
} else {
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) {
SkPaint clearPaint;
clearPaint.setColor(SkColorSetARGB(0, 0, 0, 0));
clearPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
mCanvas->drawPaint(clearPaint);
}
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;
}
SkAlphaType alphaType = (aFormat == SurfaceFormat::B8G8R8X8) ?
kOpaque_SkAlphaType : kPremul_SkAlphaType;
SkImageInfo skiInfo = SkImageInfo::Make(
aSize.width, aSize.height,
GfxFormatToSkiaColorType(aFormat),
alphaType);
// 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(skiInfo, stride);
if (!bitmap.tryAllocPixels()) {
return false;
}
bitmap.eraseARGB(0, 0, 0, 0);
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;
}
mGrContext = aGrContext;
mSize = aSize;
mFormat = aFormat;
GrSurfaceDesc targetDescriptor;
targetDescriptor.fFlags = kRenderTarget_GrSurfaceFlag;
targetDescriptor.fWidth = mSize.width;
targetDescriptor.fHeight = mSize.height;
targetDescriptor.fConfig = GfxFormatToGrConfig(mFormat);
targetDescriptor.fOrigin = kBottomLeft_GrSurfaceOrigin;
targetDescriptor.fSampleCnt = 0;
SkAutoTUnref<GrTexture> skiaTexture(mGrContext->textureProvider()->createTexture(targetDescriptor, SkSurface::kNo_Budgeted, nullptr, 0));
if (!skiaTexture) {
return false;
}
SkAutoTUnref<SkSurface> gpuSurface(SkSurface::NewRenderTargetDirect(skiaTexture->asRenderTarget()));
if (!gpuSurface) {
return false;
}
mTexture = reinterpret_cast<GrGLTextureInfo *>(skiaTexture->getTextureHandle())->fID;
mCanvas = gpuSurface->getCanvas();
return true;
}
#endif
void
DrawTargetSkia::Init(unsigned char* aData, const IntSize &aSize, int32_t aStride, SurfaceFormat aFormat)
{
SkAlphaType alphaType = kPremul_SkAlphaType;
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);
alphaType = kOpaque_SkAlphaType;
}
SkBitmap bitmap;
SkImageInfo info = SkImageInfo::Make(aSize.width,
aSize.height,
GfxFormatToSkiaColorType(aFormat),
alphaType);
bitmap.setInfo(info, 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) {
return (void*)((uintptr_t)mTexture);
}
#endif
return nullptr;
}
already_AddRefed<PathBuilder>
DrawTargetSkia::CreatePathBuilder(FillRule aFillRule) const
{
return MakeAndAddRef<PathBuilderSkia>(aFillRule);
}
void
DrawTargetSkia::ClearRect(const Rect &aRect)
{
MarkChanged();
SkPaint paint;
mCanvas->save();
mCanvas->clipRect(RectToSkRect(aRect), SkRegion::kIntersect_Op, true);
paint.setColor(SkColorSetARGB(0, 0, 0, 0));
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
mCanvas->drawPaint(paint);
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();
}
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;
}
}
// Return a rect (in user space) that covers the entire surface by applying
// the inverse of GetTransform() to (0, 0, mSize.width, mSize.height).
SkRect
DrawTargetSkia::SkRectCoveringWholeSurface() const
{
return RectToSkRect(mTransform.TransformBounds(Rect(0, 0, mSize.width, mSize.height)));
}
void
DrawTargetSkia::SnapshotDestroyed()
{
mSnapshot = nullptr;
}
} // namespace gfx
} // namespace mozilla
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