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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)
, fFilterQuality(kHigh_SkFilterQuality) {
}
SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap,
const SkRect& srcRect, const SkRect& dstRect,
SkFilterQuality filterQuality)
: INHERITED(0, 0)
, fBitmap(bitmap)
, fSrcRect(srcRect)
, fDstRect(dstRect)
, fFilterQuality(filterQuality) {
}
SkFlattenable* SkBitmapSource::CreateProc(SkReadBuffer& buffer) {
SkFilterQuality filterQuality;
if (buffer.isVersionLT(SkReadBuffer::kBitmapSourceFilterQuality_Version)) {
filterQuality = kHigh_SkFilterQuality;
} else {
filterQuality = (SkFilterQuality)buffer.readInt();
}
SkRect src, dst;
buffer.readRect(&src);
buffer.readRect(&dst);
SkBitmap bitmap;
if (!buffer.readBitmap(&bitmap)) {
return NULL;
}
return SkBitmapSource::Create(bitmap, src, dst, filterQuality);
}
void SkBitmapSource::flatten(SkWriteBuffer& buffer) const {
buffer.writeInt(fFilterQuality);
buffer.writeRect(fSrcRect);
buffer.writeRect(fDstRect);
buffer.writeBitmap(fBitmap);
}
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;
}
const SkIRect dstIRect = dstRect.roundOut();
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.setFilterQuality(
fSrcRect.width() == dstRect.width() && fSrcRect.height() == dstRect.height() ?
kNone_SkFilterQuality : fFilterQuality);
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;
}
#ifndef SK_IGNORE_TO_STRING
void SkBitmapSource::toString(SkString* str) const {
str->appendf("SkBitmapSource: (");
str->appendf("src: (%f,%f,%f,%f) dst: (%f,%f,%f,%f) ",
fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom,
fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
str->appendf("bitmap: (%d,%d)",
fBitmap.width(), fBitmap.height());
str->append(")");
}
#endif
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