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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkTileImageFilter.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkOffsetImageFilter.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkMatrix.h"
#include "SkPaint.h"
#include "SkShader.h"
#include "SkValidationUtils.h"
SkImageFilter* SkTileImageFilter::Create(const SkRect& srcRect, const SkRect& dstRect,
SkImageFilter* input) {
if (!SkIsValidRect(srcRect) || !SkIsValidRect(dstRect)) {
return nullptr;
}
if (srcRect.width() == dstRect.width() && srcRect.height() == dstRect.height()) {
SkRect ir = dstRect;
if (!ir.intersect(srcRect)) {
return SkSafeRef(input);
}
CropRect cropRect(ir);
return SkOffsetImageFilter::Make(dstRect.x() - srcRect.x(),
dstRect.y() - srcRect.y(),
sk_ref_sp<SkImageFilter>(input),
&cropRect).release();
}
return new SkTileImageFilter(srcRect, dstRect, input);
}
bool SkTileImageFilter::onFilterImageDeprecated(Proxy* proxy, const SkBitmap& src,
const Context& ctx,
SkBitmap* dst, SkIPoint* offset) const {
SkBitmap source = src;
SkIPoint srcOffset = SkIPoint::Make(0, 0);
if (!this->filterInputDeprecated(0, proxy, src, ctx, &source, &srcOffset)) {
return false;
}
SkRect dstRect;
ctx.ctm().mapRect(&dstRect, fDstRect);
if (!dstRect.intersect(SkRect::Make(ctx.clipBounds()))) {
offset->fX = offset->fY = 0;
return true;
}
const SkIRect dstIRect = dstRect.roundOut();
int w = dstIRect.width();
int h = dstIRect.height();
if (!fSrcRect.width() || !fSrcRect.height() || !w || !h) {
return false;
}
SkRect srcRect;
ctx.ctm().mapRect(&srcRect, fSrcRect);
SkIRect srcIRect;
srcRect.roundOut(&srcIRect);
srcIRect.offset(-srcOffset);
SkBitmap subset;
SkIRect srcBounds;
source.getBounds(&srcBounds);
if (!SkIRect::Intersects(srcIRect, srcBounds)) {
offset->fX = offset->fY = 0;
return true;
}
if (srcBounds.contains(srcIRect)) {
if (!source.extractSubset(&subset, srcIRect)) {
return false;
}
} else {
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(srcIRect.width(),
srcIRect.height(),
kPossible_TileUsage));
if (!device) {
return false;
}
SkCanvas canvas(device);
canvas.drawBitmap(source, SkIntToScalar(srcOffset.x()),
SkIntToScalar(srcOffset.y()));
subset = device->accessBitmap(false);
}
SkASSERT(subset.width() == srcIRect.width());
SkASSERT(subset.height() == srcIRect.height());
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(w, h));
if (nullptr == device.get()) {
return false;
}
SkCanvas canvas(device);
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
paint.setShader(SkShader::MakeBitmapShader(subset, SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode));
canvas.translate(-dstRect.fLeft, -dstRect.fTop);
canvas.drawRect(dstRect, paint);
*dst = device->accessBitmap(false);
offset->fX = dstIRect.fLeft;
offset->fY = dstIRect.fTop;
return true;
}
SkIRect SkTileImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
MapDirection direction) const {
SkRect rect = kReverse_MapDirection == direction ? fSrcRect : fDstRect;
ctm.mapRect(&rect);
return rect.roundOut();
}
SkIRect SkTileImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix&, MapDirection) const {
// Don't recurse into inputs.
return src;
}
SkRect SkTileImageFilter::computeFastBounds(const SkRect& src) const {
return fDstRect;
}
SkFlattenable* SkTileImageFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
SkRect src, dst;
buffer.readRect(&src);
buffer.readRect(&dst);
return Create(src, dst, common.getInput(0).get());
}
void SkTileImageFilter::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeRect(fSrcRect);
buffer.writeRect(fDstRect);
}
#ifndef SK_IGNORE_TO_STRING
void SkTileImageFilter::toString(SkString* str) const {
str->appendf("SkTileImageFilter: (");
str->appendf("src: %.2f %.2f %.2f %.2f",
fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom);
str->appendf(" dst: %.2f %.2f %.2f %.2f",
fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
if (this->getInput(0)) {
str->appendf("input: (");
this->getInput(0)->toString(str);
str->appendf(")");
}
str->append(")");
}
#endif
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