tunnel down texture-size-constraint to imagefilters

src/image/SkImage_Gpu.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapCache.h"
 #include "SkImage_Gpu.h"
 #include "GrCaps.h"
 #include "GrContext.h"
 #include "GrDrawContext.h"
 #include "GrTextureParamsAdjuster.h"
 #include "effects/GrYUVtoRGBEffect.h"
 #include "SkCanvas.h"
 #include "SkGpuDevice.h"
 #include "SkGr.h"
 #include "SkPixelRef.h"
 
 SkImage_Gpu::SkImage_Gpu(int w, int h, uint32_t uniqueID, SkAlphaType at, GrTexture* tex,
                          SkSurface::Budgeted budgeted)
     : INHERITED(w, h, uniqueID)
     , fTexture(SkRef(tex))
     , fAlphaType(at)
     , fBudgeted(budgeted)
     , fAddedRasterVersionToCache(false)
-    {}
+{
+    SkASSERT(tex->width() == w);
+    SkASSERT(tex->height() == h);
+}
 
 SkImage_Gpu::~SkImage_Gpu() {
     if (fAddedRasterVersionToCache.load()) {
         SkNotifyBitmapGenIDIsStale(this->uniqueID());
     }
 }
 
 extern void SkTextureImageApplyBudgetedDecision(SkImage* image) {
     if (as_IB(image)->getTexture()) {
         ((SkImage_Gpu*)image)->applyBudgetDecision();
@@ skipping 191 matching lines @@
                                     bool forceResultToOriginalSize) const {
     const SkIRect srcBounds = SkIRect::MakeWH(this->width(), this->height());
 
     if (forceResultToOriginalSize) {
         SkBitmap src;
         GrWrapTextureInBitmap(fTexture, this->width(), this->height(), this->isOpaque(), &src);
 
         const SkIRect clipBounds = srcBounds;
         SkGpuImageFilterProxy proxy(fTexture->getContext());
         SkAutoTUnref<SkImageFilter::Cache> cache(SkGpuDevice::NewImageFilterCache());
-        SkImageFilter::Context ctx(SkMatrix::I(), clipBounds, cache);
+        SkImageFilter::Context ctx(SkMatrix::I(), clipBounds, cache, SkImageFilter::kExact_SizeConstraint);
 
         SkBitmap dst;
         if (!filter->filterImage(&proxy, src, ctx, &dst, offsetResult)) {
             return nullptr;
         }
         return new SkImage_Gpu(dst.width(), dst.height(), kNeedNewImageUniqueID, dst.alphaType(),
                                dst.getTexture(), SkSurface::kNo_Budgeted);
     }
 
     const SkIRect dstR = compute_fast_ibounds(filter, srcBounds);
@@ skipping 152 matching lines @@
     if (!dst) {
         return nullptr;
     }
     
     const SkIRect srcR = SkIRect::MakeWH(desc.fWidth, desc.fHeight);
     const SkIPoint dstP = SkIPoint::Make(0, 0);
     ctx->copySurface(dst, src, srcR, dstP, GrContext::kFlushWrites_PixelOp);
     return dst;
 }