Convert SkGpuDevice::drawTextureAdjuster to SkGpuDevice::drawTextureProducer

src/gpu/GrTextureParamsAdjuster.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTextureMaker_DEFINED
 #define GrTextureMaker_DEFINED
 
@@ skipping 16 matching lines @@
  * source can generate a texture that represents some content (e.g. cpu pixels, SkPicture, ...).
  */
 class GrTextureProducer : public SkNoncopyable {
 public:
     struct CopyParams {
         GrTextureParams::FilterMode fFilter;
         int                         fWidth;
         int                         fHeight;
     };
 
+    enum FilterConstraint {
+        kYes_FilterConstraint,
+        kNo_FilterConstraint,
+    };
+
+    /**
+     * Helper for creating a fragment processor to sample the texture with a given filtering mode.
+     * It attempts to avoid making texture copies or using domains whenever possible.
+     *
+     * @param textureMatrix                    Matrix used to access the texture. It is applied to
+     *                                         the local coords. The post-transformed coords should
+     *                                         be in texel units (rather than normalized) with
+     *                                         respect to this Producer's bounds (width()/height()).
+     * @param constraintRect                   A rect that represents the area of the texture to be
+     *                                         sampled. It must be contained in the Producer's bounds
+     *                                         as defined by width()/height().
+     * @param filterConstriant                 Indicates whether filtering is limited to
+     *                                         constraintRect.
+     * @param coordsLimitedToConstraintRect    Is it known that textureMatrix*localCoords is bound
+     *                                         by the portion of the texture indicated by
+     *                                         constraintRect (without consideration of filter
+     *                                         width, just the raw coords).
+     * @param filterOrNullForBicubic           If non-null indicates the filter mode. If null means
+     *                                         use bicubic filtering.
+     **/
+    virtual const GrFragmentProcessor* createFragmentProcessor(
+                                    const SkMatrix& textureMatrix,
+                                    const SkRect& constraintRect,
+                                    FilterConstraint filterConstraint,
+                                    bool coordsLimitedToConstraintRect,
+                                    const GrTextureParams::FilterMode* filterOrNullForBicubic) = 0;
+
     virtual ~GrTextureProducer() {}
 
     int width() const { return fWidth; }
     int height() const { return fHeight; }
 
 protected:
     GrTextureProducer(int width, int height) : fWidth(width), fHeight(height) {}
 
     /** Helper for creating a key for a copy from an original key. */
     static void MakeCopyKeyFromOrigKey(const GrUniqueKey& origKey,
@@ skipping 38 matching lines @@
  * the SkCanvas::SrcRectConstraint used for subrect draws.
  */
 class GrTextureAdjuster : public GrTextureProducer {
 public:
     /** Makes the subset of the texture safe to use with the given texture parameters.
         outOffset will be the top-left corner of the subset if a copy is not made. Otherwise,
         the copy will be tight to the contents and outOffset will be (0, 0). If the copy's size
         does not match subset's dimensions then the contents are scaled to fit the copy.*/
     GrTexture* refTextureSafeForParams(const GrTextureParams&, SkIPoint* outOffset);
 
-    enum FilterConstraint {
-        kYes_FilterConstraint,
-        kNo_FilterConstraint,
-    };
-
-    /**
-     * Helper for creating a fragment processor to sample the texture with a given filtering mode.
-     * It attempts to avoids making a copy of the texture and avoid using a texture domain unless
-     * necessary.
-     *
-     * @param textureMatrix                    Matrix to apply to local coordinates to compute
-     *                                         texel coordinates. The post-transformed coordinates
-     *                                         should be in texels (relative to this->width() and
-     *                                         this->height()) and not be normalized.
-     * @param constraintRect                   Subrect of content area to be rendered. The
-     *                                         constraint rect is relative to the content area.
-     * @param filterConstriant                 Indicates whether filtering is limited to
-     *                                         constraintRect.
-     * @param coordsLimitedToConstraintRect    Is it known that textureMatrix*localCoords is bound
-     *                                         by the portion of the texture indicated by
-     *                                         constraintRect (without consideration of filter
-     *                                         width, just the raw coords).
-     * @param filterOrNullForBicubic           If non-null indicates the filter mode. If null means
-     *                                         use bicubic filtering.
-     **/
     const GrFragmentProcessor* createFragmentProcessor(
-        const SkMatrix& textureMatrix,
-        const SkRect& constraintRect,
-        FilterConstraint filterConstraint,
-        bool coordsLimitedToConstraintRect,
-        const GrTextureParams::FilterMode* filterOrNullForBicubic);
+                                const SkMatrix& textureMatrix,
+                                const SkRect& constraintRect,
+                                FilterConstraint,
+                                bool coordsLimitedToConstraintRect,
+                                const GrTextureParams::FilterMode* filterOrNullForBicubic) override;
 
 protected:
     /** The whole texture is content. */
     explicit GrTextureAdjuster(GrTexture* original)
         : INHERITED(original->width(), original->height())
         , fOriginal(original) {}
 
     GrTextureAdjuster(GrTexture* original, const SkIRect& contentArea);
 
     GrTexture* originalTexture() const { return fOriginal; }
@@ skipping 10 matching lines @@
 
 /**
  * Base class for sources that start out as something other than a texture (encoded image,
  * picture, ...).
  */
 class GrTextureMaker : public GrTextureProducer {
 public:
     /** Returns a texture that is safe for use with the params. If the size of the returned texture
         does not match width()/height() then the contents of the original must be scaled to fit
         the texture. */
-    GrTexture* refTextureForParams(GrContext*, const GrTextureParams&);
+    GrTexture* refTextureForParams(const GrTextureParams&);
+
+    const GrFragmentProcessor* createFragmentProcessor(
+                                const SkMatrix& textureMatrix,
+                                const SkRect& constraintRect,
+                                FilterConstraint filterConstraint,
+                                bool coordsLimitedToConstraintRect,
+                                const GrTextureParams::FilterMode* filterOrNullForBicubic) override;
 
 protected:
-    GrTextureMaker(int width, int height) : INHERITED(width, height) {}
+    GrTextureMaker(GrContext* context, int width, int height)
+        : INHERITED(width, height)
+        , fContext(context) {}
 
     /**
-     *  Return the maker's "original" texture. It is the responsibility of the maker
-     *  to make this efficient ... if the texture is being generated, the maker must handle
-     *  caching it (if desired).
+     *  Return the maker's "original" texture. It is the responsibility of the maker to handle any
+     *  caching of the original if desired.
      */
-    virtual GrTexture* refOriginalTexture(GrContext*) = 0;
-
-    /**
-     *  If we need to copy the producer's original texture, the producer is asked to return a key
-     *  that identifies its original + the CopyParms parameter. If the maker does not want to cache
-     *  the stretched version (e.g. the producer is volatile), this should simply return without
-     *  initializing the copyKey.
-     */
-    virtual void makeCopyKey(const CopyParams&, GrUniqueKey* copyKey) = 0;
+    virtual GrTexture* refOriginalTexture() = 0;
 
     /**
      *  Return a new (uncached) texture that is the stretch of the maker's original.
      *
      *  The base-class handles general logic for this, and only needs access to the following
      *  method:
      *  - refOriginalTexture()
      *
      *  Subclass may override this if they can handle creating the texture more directly than
      *  by copying.
      */
-    virtual GrTexture* generateTextureForParams(GrContext*, const CopyParams&);
+    virtual GrTexture* generateTextureForParams(const CopyParams&);
+
+    GrContext* context() const { return fContext; }
 
 private:
+    GrContext*  fContext;
+
     typedef GrTextureProducer INHERITED;
 };
 
 #endif