Switch SkMatrixImageFilter over to new onFilterImage interface

src/core/SkMatrixImageFilter.cpp

 /*
  * Copyright 2014 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 "SkMatrixImageFilter.h"
-#include "SkBitmap.h"
+
 #include "SkCanvas.h"
-#include "SkDevice.h"
-#include "SkColorPriv.h"
 #include "SkReadBuffer.h"
+#include "SkSpecialImage.h"
+#include "SkSpecialSurface.h"
 #include "SkWriteBuffer.h"
-#include "SkMatrix.h"
 #include "SkRect.h"
 
 SkMatrixImageFilter::SkMatrixImageFilter(const SkMatrix& transform,
                                          SkFilterQuality filterQuality,
                                          SkImageFilter* input)
-  : INHERITED(1, &input),
-    fTransform(transform),
-    fFilterQuality(filterQuality) {
+    : INHERITED(1, &input)
+    , fTransform(transform)
+    , fFilterQuality(filterQuality) {
 }
 
 SkMatrixImageFilter* SkMatrixImageFilter::Create(const SkMatrix& transform,
                                                  SkFilterQuality filterQuality,
                                                  SkImageFilter* input) {
     return new SkMatrixImageFilter(transform, filterQuality, input);
 }
 
 SkFlattenable* SkMatrixImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
     SkMatrix matrix;
     buffer.readMatrix(&matrix);
     SkFilterQuality quality = static_cast<SkFilterQuality>(buffer.readInt());
     return Create(matrix, quality, common.getInput(0).get());
 }
 
 void SkMatrixImageFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeMatrix(fTransform);
     buffer.writeInt(fFilterQuality);
 }
 
-SkMatrixImageFilter::~SkMatrixImageFilter() {
-}
+sk_sp<SkSpecialImage> SkMatrixImageFilter::onFilterImage(SkSpecialImage* source,
+                                                         const Context& ctx,
+                                                         SkIPoint* offset) const {
 
-bool SkMatrixImageFilter::onFilterImageDeprecated(Proxy* proxy,
-                                                  const SkBitmap& source,
-                                                  const Context& ctx,
-                                                  SkBitmap* result,
-                                                  SkIPoint* offset) const {
-    SkBitmap src = source;
-    SkIPoint srcOffset = SkIPoint::Make(0, 0);
-    if (!this->filterInputDeprecated(0, proxy, source, ctx, &src, &srcOffset)) {
-        return false;
+    SkIPoint inputOffset = SkIPoint::Make(0, 0);
+    sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset));
+    if (!input) {
+        return nullptr;
     }
 
-    SkRect dstRect;
-    SkIRect srcBounds, dstBounds;
-    src.getBounds(&srcBounds);
-    srcBounds.offset(srcOffset);
-    SkRect srcRect = SkRect::Make(srcBounds);
     SkMatrix matrix;
     if (!ctx.ctm().invert(&matrix)) {
-        return false;
+        return nullptr;
     }
     matrix.postConcat(fTransform);
     matrix.postConcat(ctx.ctm());
+
+    const SkIRect srcBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(),
+                                                input->width(), input->height());
+    const SkRect srcRect = SkRect::Make(srcBounds);
+
+    SkRect dstRect;
     matrix.mapRect(&dstRect, srcRect);
+    SkIRect dstBounds;
     dstRect.roundOut(&dstBounds);
 
-    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(dstBounds.width(), dstBounds.height()));
-    if (nullptr == device.get()) {
-        return false;
+    const SkImageInfo info = SkImageInfo::MakeN32Premul(dstBounds.width(), dstBounds.height());
+
+    sk_sp<SkSpecialSurface> surf(input->makeSurface(info));
+    if (!surf) {
+        return nullptr;
     }
 
-    SkCanvas canvas(device.get());
-    canvas.translate(-SkIntToScalar(dstBounds.x()), -SkIntToScalar(dstBounds.y()));
-    canvas.concat(matrix);
+    SkCanvas* canvas = surf->getCanvas();
+    SkASSERT(canvas);
+
+    canvas->clear(0x0);
+
+    canvas->translate(-SkIntToScalar(dstBounds.x()), -SkIntToScalar(dstBounds.y()));
+    canvas->concat(matrix);
+
     SkPaint paint;
-
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     paint.setFilterQuality(fFilterQuality);
-    canvas.drawBitmap(src, srcRect.x(), srcRect.y(), &paint);
 
-    *result = device.get()->accessBitmap(false);
+    input->draw(canvas, srcRect.x(), srcRect.y(), &paint);
+
     offset->fX = dstBounds.fLeft;
     offset->fY = dstBounds.fTop;
-    return true;
+    return surf->makeImageSnapshot();
 }
 
 SkRect SkMatrixImageFilter::computeFastBounds(const SkRect& src) const {
     SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src;
     SkRect dst;
     fTransform.mapRect(&dst, bounds);
     return dst;
 }
 
 SkIRect SkMatrixImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
@@ skipping 33 matching lines @@
                  fTransform[SkMatrix::kMPersp2]);
 
     str->append("<dt>FilterLevel:</dt><dd>");
     static const char* gFilterLevelStrings[] = { "None", "Low", "Medium", "High" };
     str->append(gFilterLevelStrings[fFilterQuality]);
     str->append("</dd>");
 
     str->appendf(")");
 }
 #endif