2 * Copyright 2012 The Android Open Source Project
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #include "SkOffsetImageFilter.h"
12 #include "SkReadBuffer.h"
13 #include "SkWriteBuffer.h"
17 bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
20 SkIPoint* offset) const {
21 SkImageFilter* input = getInput(0);
22 SkBitmap src = source;
23 SkIPoint srcOffset = SkIPoint::Make(0, 0);
24 #ifdef SK_DISABLE_OFFSETIMAGEFILTER_OPTIMIZATION
27 if (!cropRectIsSet()) {
29 if (input && !input->filterImage(proxy, source, ctx, &src, &srcOffset)) {
34 ctx.ctm().mapVectors(&vec, &fOffset, 1);
36 offset->fX = srcOffset.fX + SkScalarRoundToInt(vec.fX);
37 offset->fY = srcOffset.fY + SkScalarRoundToInt(vec.fY);
40 if (input && !input->filterImage(proxy, source, ctx, &src, &srcOffset)) {
45 if (!this->applyCropRect(ctx, src, srcOffset, &bounds)) {
49 SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
50 if (NULL == device.get()) {
53 SkCanvas canvas(device);
55 paint.setXfermodeMode(SkXfermode::kSrc_Mode);
56 canvas.translate(SkIntToScalar(srcOffset.fX - bounds.fLeft),
57 SkIntToScalar(srcOffset.fY - bounds.fTop));
59 ctx.ctm().mapVectors(&vec, &fOffset, 1);
60 canvas.drawBitmap(src, vec.x(), vec.y(), &paint);
61 *result = device->accessBitmap(false);
62 offset->fX = bounds.fLeft;
63 offset->fY = bounds.fTop;
68 void SkOffsetImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const {
70 getInput(0)->computeFastBounds(src, dst);
75 dst->offset(fOffset.fX, fOffset.fY);
79 bool SkOffsetImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
82 ctm.mapVectors(&vec, &fOffset, 1);
85 bounds.offset(-SkScalarCeilToInt(vec.fX), -SkScalarCeilToInt(vec.fY));
88 return getInput(0)->filterBounds(bounds, ctm, dst);
94 SkFlattenable* SkOffsetImageFilter::CreateProc(SkReadBuffer& buffer) {
95 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
97 buffer.readPoint(&offset);
98 return Create(offset.x(), offset.y(), common.getInput(0), &common.cropRect(), common.uniqueID());
101 void SkOffsetImageFilter::flatten(SkWriteBuffer& buffer) const {
102 this->INHERITED::flatten(buffer);
103 buffer.writePoint(fOffset);
106 SkOffsetImageFilter::SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input,
107 const CropRect* cropRect, uint32_t uniqueID)
108 : INHERITED(1, &input, cropRect, uniqueID) {
112 #ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
113 SkOffsetImageFilter::SkOffsetImageFilter(SkReadBuffer& buffer)
114 : INHERITED(1, buffer) {
115 buffer.readPoint(&fOffset);
116 buffer.validate(SkScalarIsFinite(fOffset.fX) &&
117 SkScalarIsFinite(fOffset.fY));