bool SkImageFilter::canComputeFastBounds() const {
if (this->affectsTransparentBlack()) {
return false;
}
for (int i = 0; i < fInputCount; i++) {
SkImageFilter* input = this->getInput(i);
if (input && !input->canComputeFastBounds()) {
return false;
}
}
return true;
}
void SkMergeImageFilter::toString(SkString* str) const {
str->appendf("SkMergeImageFilter: (");
for (int i = 0; i < this->countInputs(); ++i) {
SkImageFilter* filter = this->getInput(i);
str->appendf("%d: (", i);
filter->toString(str);
str->appendf(")");
}
str->append(")");
}
SkBitmap SkImageFilter::getInputResult(int index, Proxy* proxy,
const SkBitmap& src, const SkMatrix& ctm,
SkIPoint* loc) {
SkASSERT(index < fInputCount);
SkImageFilter* input = getInput(index);
SkBitmap result;
if (input && input->filterImage(proxy, src, ctm, &result, loc)) {
return result;
} else {
return src;
}
}
bool SkImageFilter::canHandleComplexCTM() const {
if (!this->onCanHandleComplexCTM()) {
return false;
}
const int count = this->countInputs();
for (int i = 0; i < count; ++i) {
SkImageFilter* input = this->getInput(i);
if (input && !input->canHandleComplexCTM()) {
return false;
}
}
return true;
}
bool SkMergeImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
const SkMatrix& ctm,
SkBitmap* result, SkIPoint* loc) {
if (countInputs() < 1) {
return false;
}
const SkIRect srcBounds = SkIRect::MakeXYWH(loc->x(), loc->y(),
src.width(), src.height());
SkIRect bounds;
if (!this->filterBounds(srcBounds, ctm, &bounds)) {
return false;
}
const int x0 = bounds.left();
const int y0 = bounds.top();
SkAutoTUnref<SkDevice> dst(proxy->createDevice(bounds.width(), bounds.height()));
if (NULL == dst) {
return false;
}
SkCanvas canvas(dst);
SkPaint paint;
int inputCount = countInputs();
for (int i = 0; i < inputCount; ++i) {
SkBitmap tmp;
const SkBitmap* srcPtr;
SkIPoint pos = *loc;
SkImageFilter* filter = getInput(i);
if (filter) {
if (!filter->filterImage(proxy, src, ctm, &tmp, &pos)) {
return false;
}
srcPtr = &tmp;
} else {
srcPtr = &src;
}
if (fModes) {
paint.setXfermodeMode((SkXfermode::Mode)fModes[i]);
} else {
paint.setXfermode(NULL);
}
canvas.drawSprite(*srcPtr, pos.x() - x0, pos.y() - y0, &paint);
}
loc->set(bounds.left(), bounds.top());
*result = dst->accessBitmap(false);
return true;
}
void SkComposeImageFilter::toString(SkString* str) const {
SkImageFilter* outer = getInput(0);
SkImageFilter* inner = getInput(1);
str->appendf("SkComposeImageFilter: (");
str->appendf("outer: ");
outer->toString(str);
str->appendf("inner: ");
inner->toString(str);
str->appendf(")");
}
bool SkMergeImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
const Context& ctx,
SkBitmap* result, SkIPoint* offset) const {
if (countInputs() < 1) {
return false;
}
SkIRect bounds;
if (!this->applyCropRect(ctx, src, SkIPoint::Make(0, 0), &bounds)) {
return false;
}
const int x0 = bounds.left();
const int y0 = bounds.top();
SkAutoTUnref<SkBaseDevice> dst(proxy->createDevice(bounds.width(), bounds.height()));
if (NULL == dst) {
return false;
}
SkCanvas canvas(dst);
SkPaint paint;
int inputCount = countInputs();
for (int i = 0; i < inputCount; ++i) {
SkBitmap tmp;
const SkBitmap* srcPtr;
SkIPoint pos = SkIPoint::Make(0, 0);
SkImageFilter* filter = getInput(i);
if (filter) {
if (!filter->filterImage(proxy, src, ctx, &tmp, &pos)) {
return false;
}
srcPtr = &tmp;
} else {
srcPtr = &src;
}
if (fModes) {
paint.setXfermodeMode((SkXfermode::Mode)fModes[i]);
} else {
paint.setXfermode(NULL);
}
canvas.drawSprite(*srcPtr, pos.x() - x0, pos.y() - y0, &paint);
}
offset->fX = bounds.left();
offset->fY = bounds.top();
*result = dst->accessBitmap(false);
return true;
}
bool SkXfermodeImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& src,
const SkMatrix& ctm,
SkBitmap* dst,
SkIPoint* offset) {
SkBitmap background = src, foreground = src;
SkImageFilter* backgroundInput = getInput(0);
SkImageFilter* foregroundInput = getInput(1);
SkIPoint backgroundOffset = SkIPoint::Make(0, 0);
if (backgroundInput &&
!backgroundInput->filterImage(proxy, src, ctm, &background, &backgroundOffset)) {
return false;
}
SkIPoint foregroundOffset = SkIPoint::Make(0, 0);
if (foregroundInput &&
!foregroundInput->filterImage(proxy, src, ctm, &foreground, &foregroundOffset)) {
return false;
}
SkIRect bounds, foregroundBounds;
background.getBounds(&bounds);
bounds.offset(backgroundOffset);
foreground.getBounds(&foregroundBounds);
foregroundBounds.offset(foregroundOffset);
bounds.join(foregroundBounds);
if (!applyCropRect(&bounds, ctm)) {
return false;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
if (NULL == device.get()) {
return false;
}
SkCanvas canvas(device);
canvas.translate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
canvas.drawBitmap(background, SkIntToScalar(backgroundOffset.fX),
SkIntToScalar(backgroundOffset.fY), &paint);
paint.setXfermode(fMode);
canvas.drawBitmap(foreground, SkIntToScalar(foregroundOffset.fX),
SkIntToScalar(foregroundOffset.fY), &paint);
canvas.clipRect(SkRect::Make(foregroundBounds), SkRegion::kDifference_Op);
paint.setColor(SK_ColorTRANSPARENT);
canvas.drawPaint(paint);
*dst = device->accessBitmap(false);
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
sk_sp<SkSpecialImage> SkImageFilter::filterInput(int index,
SkSpecialImage* src,
const Context& ctx,
SkIPoint* offset) const {
SkImageFilter* input = this->getInput(index);
if (!input) {
return sk_sp<SkSpecialImage>(SkRef(src));
}
sk_sp<SkSpecialImage> result(input->filterImage(src, this->mapContext(ctx), offset));
SkASSERT(!result || src->isTextureBacked() == result->isTextureBacked());
return result;
}
SkRect SkImageFilter::computeFastBounds(const SkRect& src) const {
if (0 == this->countInputs()) {
return src;
}
SkRect combinedBounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src;
for (int i = 1; i < this->countInputs(); i++) {
SkImageFilter* input = this->getInput(i);
if (input) {
combinedBounds.join(input->computeFastBounds(src));
} else {
combinedBounds.join(src);
}
}
return combinedBounds;
}
bool SkImageFilter::filterInput(int index, Proxy* proxy, const SkBitmap& src,
const Context& origCtx,
SkBitmap* result, SkIPoint* offset,
bool relaxSizeConstraint) const {
SkImageFilter* input = this->getInput(index);
if (!input) {
return true;
}
SizeConstraint constraint = origCtx.sizeConstraint();
if (relaxSizeConstraint && (kExact_SizeConstraint == constraint)) {
constraint = kApprox_SizeConstraint;
}
Context ctx(origCtx.ctm(), origCtx.clipBounds(), origCtx.cache(), constraint);
return input->filterImage(proxy, src, this->mapContext(ctx), result, offset);
}
bool SkComposeImageFilter::onFilterBounds(const SkIRect& src,
const SkMatrix& ctm,
SkIRect* dst) {
SkImageFilter* outer = getInput(0);
SkImageFilter* inner = getInput(1);
if (!outer && !inner) {
return false;
}
if (!outer || !inner) {
return (outer ? outer : inner)->filterBounds(src, ctm, dst);
}
SkIRect tmp;
return inner->filterBounds(src, ctm, &tmp) &&
outer->filterBounds(tmp, ctm, dst);
}
SkIRect SkImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
MapDirection direction) const {
if (this->countInputs() < 1) {
return src;
}
SkIRect totalBounds;
for (int i = 0; i < this->countInputs(); ++i) {
SkImageFilter* filter = this->getInput(i);
SkIRect rect = filter ? filter->filterBounds(src, ctm, direction) : src;
if (0 == i) {
totalBounds = rect;
} else {
totalBounds.join(rect);
}
}
return totalBounds;
}
bool SkComposeImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& src,
const SkMatrix& ctm,
SkBitmap* result,
SkIPoint* offset) {
SkImageFilter* outer = getInput(0);
SkImageFilter* inner = getInput(1);
if (!outer && !inner) {
return false;
}
if (!outer || !inner) {
return (outer ? outer : inner)->filterImage(proxy, src, ctm, result, offset);
}
SkBitmap tmp;
return inner->filterImage(proxy, src, ctm, &tmp, offset) &&
outer->filterImage(proxy, tmp, ctm, result, offset);
}
void SkImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const {
if (0 == fInputCount) {
*dst = src;
return;
}
if (this->getInput(0)) {
this->getInput(0)->computeFastBounds(src, dst);
} else {
*dst = src;
}
for (int i = 1; i < fInputCount; i++) {
SkImageFilter* input = this->getInput(i);
if (input) {
SkRect bounds;
input->computeFastBounds(src, &bounds);
dst->join(bounds);
} else {
dst->join(src);
}
}
}
void SkBaseDevice::drawBitmapAsSprite(const SkDraw& draw, const SkBitmap& bitmap, int x, int y,
const SkPaint& paint) {
SkImageFilter* filter = paint.getImageFilter();
if (filter && !this->canHandleImageFilter(filter)) {
SkImageFilter::DeviceProxy proxy(this);
SkBitmap dst;
SkIPoint offset = SkIPoint::Make(0, 0);
SkMatrix matrix = *draw.fMatrix;
matrix.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y));
const SkIRect clipBounds = draw.fClip->getBounds().makeOffset(-x, -y);
SkAutoTUnref<SkImageFilter::Cache> cache(this->getImageFilterCache());
SkImageFilter::Context ctx(matrix, clipBounds, cache.get());
if (filter->filterImageDeprecated(&proxy, bitmap, ctx, &dst, &offset)) {
SkPaint tmpUnfiltered(paint);
tmpUnfiltered.setImageFilter(nullptr);
this->drawSprite(draw, dst, x + offset.x(), y + offset.y(), tmpUnfiltered);
}
} else {
this->drawSprite(draw, bitmap, x, y, paint);
}
}
bool SkImageFilter::filterInputGPU(int index, SkImageFilter::Proxy* proxy,
const SkBitmap& src, const Context& origCtx,
SkBitmap* result, SkIPoint* offset,
bool relaxSizeConstraint) const {
SkImageFilter* input = this->getInput(index);
if (!input) {
return true;
}
// Ensure that GrContext calls under filterImage and filterImageGPU below will see an identity
// matrix with no clip and that the matrix, clip, and render target set before this function was
// called are restored before we return to the caller.
GrContext* context = src.getTexture()->getContext();
SizeConstraint constraint = origCtx.sizeConstraint();
if (relaxSizeConstraint && (kExact_SizeConstraint == constraint)) {
constraint = kApprox_SizeConstraint;
}
Context ctx(origCtx.ctm(), origCtx.clipBounds(), origCtx.cache(), constraint);
if (input->filterImage(proxy, src, this->mapContext(ctx), result, offset)) {
if (!result->getTexture()) {
const SkImageInfo info = result->info();
if (kUnknown_SkColorType == info.colorType()) {
return false;
}
SkAutoTUnref<GrTexture> resultTex(
GrRefCachedBitmapTexture(context, *result, GrTextureParams::ClampNoFilter()));
if (!resultTex) {
return false;
}
result->setPixelRef(new SkGrPixelRef(info, resultTex))->unref();
}
return true;
} else {
return false;
}
}
bool SkComposeImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& src,
const Context& ctx,
SkBitmap* result,
SkIPoint* offset) const {
SkImageFilter* outer = getInput(0);
SkImageFilter* inner = getInput(1);
SkBitmap tmp;
SkIPoint innerOffset = SkIPoint::Make(0, 0);
SkIPoint outerOffset = SkIPoint::Make(0, 0);
if (!inner->filterImage(proxy, src, ctx, &tmp, &innerOffset))
return false;
SkMatrix outerMatrix(ctx.ctm());
outerMatrix.postTranslate(SkIntToScalar(-innerOffset.x()), SkIntToScalar(-innerOffset.y()));
Context outerContext(outerMatrix, ctx.clipBounds(), ctx.cache());
if (!outer->filterImage(proxy, tmp, outerContext, result, &outerOffset)) {
return false;
}
*offset = innerOffset + outerOffset;
return true;
}
virtual bool onFilterImage(Proxy* proxy, const SkBitmap& src, const Context& ctx,
SkBitmap* dst, SkIPoint* offset) const override {
SkBitmap source = src;
SkImageFilter* input = getInput(0);
SkIPoint srcOffset = SkIPoint::Make(0, 0);
if (input && !input->filterImage(proxy, src, ctx, &source, &srcOffset)) {
return false;
}
SkIRect bounds;
if (!this->applyCropRect(ctx, proxy, source, &srcOffset, &bounds, &source)) {
return false;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
SkCanvas canvas(device);
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
canvas.drawBitmap(source, fDX - bounds.left(), fDY - bounds.top(), &paint);
*dst = device->accessBitmap(false);
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
bool SkBlendImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& src,
const SkMatrix& ctm,
SkBitmap* dst,
SkIPoint* offset) {
SkBitmap background, foreground = src;
SkImageFilter* backgroundInput = getBackgroundInput();
SkImageFilter* foregroundInput = getForegroundInput();
SkASSERT(NULL != backgroundInput);
if (!backgroundInput->filterImage(proxy, src, ctm, &background, offset)) {
return false;
}
if (foregroundInput && !foregroundInput->filterImage(proxy, src, ctm, &foreground, offset)) {
return false;
}
SkAutoLockPixels alp_foreground(foreground), alp_background(background);
if (!foreground.getPixels() || !background.getPixels()) {
return false;
}
dst->setConfig(background.config(), background.width(), background.height());
dst->allocPixels();
SkCanvas canvas(*dst);
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
canvas.drawBitmap(background, 0, 0, &paint);
// FEBlend's multiply mode is (1 - Sa) * Da + (1 - Da) * Sc + Sc * Dc
// Skia's is just Sc * Dc. So we use a custom proc to implement FEBlend's
// version.
if (fMode == SkBlendImageFilter::kMultiply_Mode) {
paint.setXfermode(new SkProcXfermode(multiply_proc))->unref();
} else {
paint.setXfermodeMode(modeToXfermode(fMode));
}
canvas.drawBitmap(foreground, 0, 0, &paint);
return true;
}
bool SkImageFilter::applyCropRect(const Context& ctx, Proxy* proxy, const SkBitmap& src,
SkIPoint* srcOffset, SkIRect* bounds, SkBitmap* dst) const {
SkIRect srcBounds;
src.getBounds(&srcBounds);
srcBounds.offset(*srcOffset);
#ifdef SK_SUPPORT_SRC_BOUNDS_BLOAT_FOR_IMAGEFILTERS
if (!fCropRect.applyTo(srcBounds, ctx, bounds)) {
#else
SkIRect dstBounds;
this->onFilterNodeBounds(srcBounds, ctx.ctm(), &dstBounds, kForward_MapDirection);
if (!fCropRect.applyTo(dstBounds, ctx, bounds)) {
#endif
return false;
}
if (srcBounds.contains(*bounds)) {
*dst = src;
return true;
} else {
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds->width(), bounds->height()));
if (!device) {
return false;
}
SkCanvas canvas(device);
canvas.clear(0x00000000);
canvas.drawBitmap(src, srcOffset->x() - bounds->x(), srcOffset->y() - bounds->y());
*srcOffset = SkIPoint::Make(bounds->x(), bounds->y());
*dst = device->accessBitmap(false);
return true;
}
}
bool SkImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) const {
if (fInputCount < 1) {
*dst = src;
return true;
}
SkIRect bounds, totalBounds;
this->onFilterNodeBounds(src, ctm, &bounds, kReverse_MapDirection);
for (int i = 0; i < fInputCount; ++i) {
SkImageFilter* filter = this->getInput(i);
SkIRect rect = bounds;
if (filter && !filter->filterBounds(bounds, ctm, &rect)) {
return false;
}
if (0 == i) {
totalBounds = rect;
} else {
totalBounds.join(rect);
}
}
// don't modify dst until now, so we don't accidentally change it in the
// loop, but then return false on the next filter.
*dst = totalBounds;
return true;
}
void SkImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix&,
SkIRect* dst, MapDirection) const {
*dst = src;
}
SkImageFilter::Context SkImageFilter::mapContext(const Context& ctx) const {
#ifdef SK_SUPPORT_SRC_BOUNDS_BLOAT_FOR_IMAGEFILTERS
return ctx;
#else
SkIRect clipBounds;
this->onFilterNodeBounds(ctx.clipBounds(), ctx.ctm(), &clipBounds,
MapDirection::kReverse_MapDirection);
return Context(ctx.ctm(), clipBounds, ctx.cache());
#endif
}
bool SkImageFilter::asFragmentProcessor(GrFragmentProcessor**, GrTexture*,
const SkMatrix&, const SkIRect&) const {
return false;
}
SkImageFilter* SkImageFilter::CreateMatrixFilter(const SkMatrix& matrix,
SkFilterQuality filterQuality,
SkImageFilter* input) {
return SkMatrixImageFilter::Create(matrix, filterQuality, input);
}
SkImageFilter* SkImageFilter::newWithLocalMatrix(const SkMatrix& matrix) const {
// SkLocalMatrixImageFilter takes SkImage* in its factory, but logically that parameter
// is *always* treated as a const ptr. Hence the const-cast here.
//
return SkLocalMatrixImageFilter::Create(matrix, const_cast<SkImageFilter*>(this));
}
#if SK_SUPPORT_GPU
bool SkImageFilter::filterInputGPU(int index, SkImageFilter::Proxy* proxy,
const SkBitmap& src, const Context& ctx,
SkBitmap* result, SkIPoint* offset) const {
SkImageFilter* input = this->getInput(index);
if (!input) {
return true;
}
// Ensure that GrContext calls under filterImage and filterImageGPU below will see an identity
// matrix with no clip and that the matrix, clip, and render target set before this function was
// called are restored before we return to the caller.
GrContext* context = src.getTexture()->getContext();
if (input->filterImage(proxy, src, this->mapContext(ctx), result, offset)) {
if (!result->getTexture()) {
const SkImageInfo info = result->info();
if (kUnknown_SkColorType == info.colorType()) {
return false;
}
SkAutoTUnref<GrTexture> resultTex(
GrRefCachedBitmapTexture(context, *result, GrTextureParams::ClampNoFilter()));
if (!resultTex) {
return false;
}
result->setPixelRef(new SkGrPixelRef(info, resultTex))->unref();
}
return true;
} else {
return false;
}
}
SkRect SkComposeImageFilter::computeFastBounds(const SkRect& src) const {
SkImageFilter* outer = this->getInput(0);
SkImageFilter* inner = this->getInput(1);
return outer->computeFastBounds(inner->computeFastBounds(src));
}
bool SkImageFilter::applyCropRect(const Context& ctx, Proxy* proxy, const SkBitmap& src,
SkIPoint* srcOffset, SkIRect* bounds, SkBitmap* dst) const {
SkIRect srcBounds;
src.getBounds(&srcBounds);
srcBounds.offset(*srcOffset);
#ifdef SK_SUPPORT_SRC_BOUNDS_BLOAT_FOR_IMAGEFILTERS
if (!fCropRect.applyTo(srcBounds, ctx, bounds)) {
#else
SkIRect dstBounds;
this->onFilterNodeBounds(srcBounds, ctx.ctm(), &dstBounds, kForward_MapDirection);
if (!fCropRect.applyTo(dstBounds, ctx, bounds)) {
#endif
return false;
}
if (srcBounds.contains(*bounds)) {
*dst = src;
return true;
} else {
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds->width(), bounds->height()));
if (!device) {
return false;
}
SkCanvas canvas(device);
canvas.clear(0x00000000);
canvas.drawBitmap(src, srcOffset->x() - bounds->x(), srcOffset->y() - bounds->y());
*srcOffset = SkIPoint::Make(bounds->x(), bounds->y());
*dst = device->accessBitmap(false);
return true;
}
}
bool SkImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) const {
if (fInputCount < 1) {
*dst = src;
return true;
}
SkIRect bounds, totalBounds;
this->onFilterNodeBounds(src, ctm, &bounds, kReverse_MapDirection);
for (int i = 0; i < fInputCount; ++i) {
SkImageFilter* filter = this->getInput(i);
SkIRect rect = bounds;
if (filter && !filter->filterBounds(bounds, ctm, &rect)) {
return false;
}
if (0 == i) {
totalBounds = rect;
} else {
totalBounds.join(rect);
}
}
// don't modify dst until now, so we don't accidentally change it in the
// loop, but then return false on the next filter.
*dst = totalBounds;
return true;
}
void SkImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix&,
SkIRect* dst, MapDirection) const {
*dst = src;
}
SkImageFilter::Context SkImageFilter::mapContext(const Context& ctx) const {
#ifdef SK_SUPPORT_SRC_BOUNDS_BLOAT_FOR_IMAGEFILTERS
return ctx;
#else
SkIRect clipBounds;
this->onFilterNodeBounds(ctx.clipBounds(), ctx.ctm(), &clipBounds,
MapDirection::kReverse_MapDirection);
return Context(ctx.ctm(), clipBounds, ctx.cache(), ctx.sizeConstraint());
#endif
}
bool SkImageFilter::asFragmentProcessor(GrFragmentProcessor**, GrTexture*,
const SkMatrix&, const SkIRect&) const {
return false;
}
SkImageFilter* SkImageFilter::CreateMatrixFilter(const SkMatrix& matrix,
SkFilterQuality filterQuality,
SkImageFilter* input) {
return SkMatrixImageFilter::Create(matrix, filterQuality, input);
}
SkImageFilter* SkImageFilter::newWithLocalMatrix(const SkMatrix& matrix) const {
// SkLocalMatrixImageFilter takes SkImage* in its factory, but logically that parameter
// is *always* treated as a const ptr. Hence the const-cast here.
//
return SkLocalMatrixImageFilter::Create(matrix, const_cast<SkImageFilter*>(this));
}
#if SK_SUPPORT_GPU
void SkImageFilter::WrapTexture(GrTexture* texture, int width, int height, SkBitmap* result) {
SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
result->setInfo(info);
result->setPixelRef(new SkGrPixelRef(info, texture))->unref();
}
bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
const Context& ctx,
SkBitmap* result,
SkIPoint* offset) const {
SkImageFilter* input = getInput(0);
SkBitmap src = source;
SkIPoint srcOffset = SkIPoint::Make(0, 0);
#ifdef SK_DISABLE_OFFSETIMAGEFILTER_OPTIMIZATION
if (false) {
#else
if (!cropRectIsSet()) {
#endif
if (input && !input->filterImage(proxy, source, ctx, &src, &srcOffset)) {
return false;
}
SkVector vec;
ctx.ctm().mapVectors(&vec, &fOffset, 1);
offset->fX = srcOffset.fX + SkScalarRoundToInt(vec.fX);
offset->fY = srcOffset.fY + SkScalarRoundToInt(vec.fY);
*result = src;
} else {
if (input && !input->filterImage(proxy, source, ctx, &src, &srcOffset)) {
return false;
}
SkIRect bounds;
if (!this->applyCropRect(ctx, src, srcOffset, &bounds)) {
return false;
}
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
if (NULL == device.get()) {
return false;
}
SkCanvas canvas(device);
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
canvas.translate(SkIntToScalar(srcOffset.fX - bounds.fLeft),
SkIntToScalar(srcOffset.fY - bounds.fTop));
SkVector vec;
ctx.ctm().mapVectors(&vec, &fOffset, 1);
canvas.drawBitmap(src, vec.x(), vec.y(), &paint);
*result = device->accessBitmap(false);
offset->fX = bounds.fLeft;
offset->fY = bounds.fTop;
}
return true;
}
void SkOffsetImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const {
if (getInput(0)) {
getInput(0)->computeFastBounds(src, dst);
} else {
*dst = src;
}
SkRect copy = *dst;
dst->offset(fOffset.fX, fOffset.fY);
dst->join(copy);
}
bool SkOffsetImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) const {
SkVector vec;
ctm.mapVectors(&vec, &fOffset, 1);
SkIRect bounds = src;
bounds.offset(-SkScalarCeilToInt(vec.fX), -SkScalarCeilToInt(vec.fY));
bounds.join(src);
if (getInput(0)) {
return getInput(0)->filterBounds(bounds, ctm, dst);
}
*dst = bounds;
return true;
}
void colorSpaceTest()
{
// Build filter tree
RefPtr<ReferenceFilter> referenceFilter = ReferenceFilter::create();
// Add a dummy source graphic input
RefPtr<FilterEffect> sourceEffect = referenceFilter->sourceGraphic();
sourceEffect->setOperatingColorSpace(ColorSpaceDeviceRGB);
// Add a blur effect (with input : source)
RefPtr<FilterEffect> blurEffect =
FEGaussianBlur::create(referenceFilter.get(), 3.0f, 3.0f);
blurEffect->setOperatingColorSpace(ColorSpaceLinearRGB);
blurEffect->inputEffects().append(sourceEffect);
// Add a blend effect (with inputs : blur, source)
RefPtr<FilterEffect> blendEffect =
FEBlend::create(referenceFilter.get(), FEBLEND_MODE_NORMAL);
blendEffect->setOperatingColorSpace(ColorSpaceDeviceRGB);
FilterEffectVector& blendInputs = blendEffect->inputEffects();
blendInputs.reserveCapacity(2);
blendInputs.append(sourceEffect);
blendInputs.append(blurEffect);
// Add a merge effect (with inputs : blur, blend)
RefPtr<FilterEffect> mergeEffect = FEMerge::create(referenceFilter.get());
mergeEffect->setOperatingColorSpace(ColorSpaceLinearRGB);
FilterEffectVector& mergeInputs = mergeEffect->inputEffects();
mergeInputs.reserveCapacity(2);
mergeInputs.append(blurEffect);
mergeInputs.append(blendEffect);
referenceFilter->setLastEffect(mergeEffect);
// Get SkImageFilter resulting tree
SkiaImageFilterBuilder builder;
RefPtr<SkImageFilter> filter = builder.build(referenceFilter->lastEffect(), ColorSpaceDeviceRGB);
// Let's check that the resulting tree looks like this :
// ColorSpace (Linear->Device) : CS (L->D)
// |
// Merge (L)
// | |
// | CS (D->L)
// | |
// | Blend (D)
// | / |
// | CS (L->D) |
// | / |
// Blur (L) |
// \ |
// CS (D->L) |
// \ |
// Source Graphic (D)
EXPECT_EQ(filter->countInputs(), 1); // Should be CS (L->D)
SkImageFilter* child = filter->getInput(0); // Should be Merge
EXPECT_EQ(child->asColorFilter(0), false);
EXPECT_EQ(child->countInputs(), 2);
child = child->getInput(1); // Should be CS (D->L)
EXPECT_EQ(child->asColorFilter(0), true);
EXPECT_EQ(child->countInputs(), 1);
child = child->getInput(0); // Should be Blend
EXPECT_EQ(child->asColorFilter(0), false);
EXPECT_EQ(child->countInputs(), 2);
child = child->getInput(0); // Should be CS (L->D)
EXPECT_EQ(child->asColorFilter(0), true);
EXPECT_EQ(child->countInputs(), 1);
child = child->getInput(0); // Should be Blur
EXPECT_EQ(child->asColorFilter(0), false);
EXPECT_EQ(child->countInputs(), 1);
child = child->getInput(0); // Should be CS (D->L)
EXPECT_EQ(child->asColorFilter(0), true);
EXPECT_EQ(child->countInputs(), 1);
}