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/*
* Copyright 2012 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmapSource.h"
#include "SkDevice.h"
#include "SkCanvas.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkValidationUtils.h"
SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap)
: INHERITED(0, 0),
fBitmap(bitmap),
fSrcRect(SkRect::MakeWH(SkIntToScalar(bitmap.width()),
SkIntToScalar(bitmap.height()))),
fDstRect(fSrcRect) {
}
SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap, const SkRect& srcRect, const SkRect& dstRect)
: INHERITED(0, 0),
fBitmap(bitmap),
fSrcRect(srcRect),
fDstRect(dstRect) {
}
SkBitmapSource::SkBitmapSource(SkReadBuffer& buffer)
: INHERITED(0, buffer) {
fBitmap.unflatten(buffer);
buffer.readRect(&fSrcRect);
buffer.readRect(&fDstRect);
buffer.validate(buffer.isValid() && SkIsValidRect(fSrcRect) && SkIsValidRect(fDstRect));
}
void SkBitmapSource::flatten(SkWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
fBitmap.flatten(buffer);
buffer.writeRect(fSrcRect);
buffer.writeRect(fDstRect);
}
bool SkBitmapSource::onFilterImage(Proxy* proxy, const SkBitmap&, const Context& ctx,
SkBitmap* result, SkIPoint* offset) const {
SkRect bounds, dstRect;
fBitmap.getBounds(&bounds);
ctx.ctm().mapRect(&dstRect, fDstRect);
if (fSrcRect == bounds && dstRect == bounds) {
// No regions cropped out or resized; return entire bitmap.
*result = fBitmap;
offset->fX = offset->fY = 0;
return true;
}
SkIRect dstIRect;
dstRect.roundOut(&dstIRect);
SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(dstIRect.width(), dstIRect.height()));
if (NULL == device.get()) {
return false;
}
SkCanvas canvas(device.get());
SkPaint paint;
// Subtract off the integer component of the translation (will be applied in loc, below).
dstRect.offset(-SkIntToScalar(dstIRect.fLeft), -SkIntToScalar(dstIRect.fTop));
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
// FIXME: this probably shouldn't be necessary, but drawBitmapRectToRect asserts
// None filtering when it's translate-only
paint.setFilterLevel(
fSrcRect.width() == dstRect.width() && fSrcRect.height() == dstRect.height() ?
SkPaint::kNone_FilterLevel : SkPaint::kHigh_FilterLevel);
canvas.drawBitmapRectToRect(fBitmap, &fSrcRect, dstRect, &paint);
*result = device.get()->accessBitmap(false);
offset->fX = dstIRect.fLeft;
offset->fY = dstIRect.fTop;
return true;
}
void SkBitmapSource::computeFastBounds(const SkRect&, SkRect* dst) const {
*dst = fDstRect;
}
bool SkBitmapSource::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
SkIRect* dst) const {
*dst = src;
return true;
}
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