Moving 4 SkImageFilter derived classes from blink to skia
There were 4 classes in blink that derived from SkImageFilter :
- TileImageFilter -> SkTileImageFilter
- OffsetImageFilter -> SkOffsetImageFilter (already existed)
- FloodImageFilter -> SkFloodImageFilter
- CompositeImageFilter -> SkCompositeImageFilter
All functions were copied as is, without modification (except for warnings fixes), except for the offset filter, which was merged into the existing SkOffsetImageFilter class, as a special case when a crop rect is provided. Since the names won't clash with the names in blink, it should be easy to integrate them in blink later and fix issues, if needed.
BUG=
R=senorblanco@google.com, senorblanco@chromium.org, bsalomon@google.com, reed@google.com, mtklein@google.com
Author: sugoi@chromium.org
Review URL: https://chromiumcodereview.appspot.com/24157005
git-svn-id: http://skia.googlecode.com/svn/trunk@11475 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkTileImageFilter.cpp b/src/effects/SkTileImageFilter.cpp
new file mode 100644
index 0000000..f2c586d
--- /dev/null
+++ b/src/effects/SkTileImageFilter.cpp
@@ -0,0 +1,66 @@
+/*
+ * 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 "SkFlattenableBuffers.h"
+#include "SkMatrix.h"
+#include "SkPaint.h"
+#include "SkShader.h"
+
+bool SkTileImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
+ SkBitmap* dst, SkIPoint* offset) {
+ SkBitmap source = src;
+ SkImageFilter* input = getInput(0);
+ SkIPoint localOffset = SkIPoint::Make(0, 0);
+ if (input && !input->filterImage(proxy, src, ctm, &source, &localOffset)) {
+ return false;
+ }
+
+ int w = SkScalarTruncToInt(fDstRect.width());
+ int h = SkScalarTruncToInt(fDstRect.height());
+ if (!fSrcRect.width() || !fSrcRect.height() || !w || !h) {
+ return false;
+ }
+
+ SkIRect srcRect;
+ fSrcRect.roundOut(&srcRect);
+ SkBitmap subset;
+ if (!source.extractSubset(&subset, srcRect)) {
+ return false;
+ }
+
+ SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(w, h));
+ SkIRect bounds;
+ source.getBounds(&bounds);
+ SkCanvas canvas(device);
+ SkPaint paint;
+ paint.setXfermodeMode(SkXfermode::kSrc_Mode);
+
+ SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(subset,
+ SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode));
+ paint.setShader(shader);
+ SkRect dstRect = fDstRect;
+ dstRect.offset(SkIntToScalar(localOffset.fX), SkIntToScalar(localOffset.fY));
+ canvas.drawRect(dstRect, paint);
+ *dst = device->accessBitmap(false);
+ return true;
+}
+
+SkTileImageFilter::SkTileImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
+ buffer.readRect(&fSrcRect);
+ buffer.readRect(&fDstRect);
+}
+
+void SkTileImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
+ this->INHERITED::flatten(buffer);
+ buffer.writeRect(fSrcRect);
+ buffer.writeRect(fDstRect);
+}
+