Separate out natively-texture image/bmp draws from cached-as-texture image/bmp draws

src/gpu/GrTextureParamsAdjuster.h

Index: src/gpu/GrTextureParamsAdjuster.h
diff --git a/src/gpu/GrTextureParamsAdjuster.h b/src/gpu/GrTextureParamsAdjuster.h
index f8fdc2d4fbe62fd53046d1309611c07d16303af6..3ef1d30150ad7720c76fec96acde71988aedbef9 100644
--- a/src/gpu/GrTextureParamsAdjuster.h
+++ b/src/gpu/GrTextureParamsAdjuster.h
@@ -83,14 +83,42 @@ public:
         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 transform local coords by to compute
+     *                                         texture coords.
+     * @param constraintRect                   Subrect of content area to be rendered. Must be
+     *                                         clipped to the content area already.

[robertphillips, 2015/11/05 20:13:24]

filterConstraint ?
Could use a less cryptic explanation ...

[bsalomon, 2015/11/06 15:24:26]

It has a

+     * @param constraintMode                   Do all texture reads 
+     * @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).

[robertphillips, 2015/11/05 20:13:24]

// An in/out param that is ...
// On input it ... on output it ...

?

[bsalomon, 2015/11/06 15:24:26]

It's not in/out. Made a real comment.

+     * @param filterOrNullForBicubic           Exactly what it sounds like.
+     **/
+    const GrFragmentProcessor* createFragmentProcessor(
+        const SkMatrix& textureMatrix,
+        const SkRect& constraintRect,
+        FilterConstraint filterConstraint,
+        bool coordsLimitedToConstraintRect,
+        const GrTextureParams::FilterMode* filterOrNullForBicubic);
+
+    GrTexture* originalTexture() { return fOriginal; }
+
 protected:
     /** The whole texture is content. */
     explicit GrTextureAdjuster(GrTexture* original): fOriginal(original) {}
 
     GrTextureAdjuster(GrTexture* original, const SkIRect& contentArea);
 
-    GrTexture* originalTexture() { return fOriginal; }
-
     /** Returns the content area or null for the whole original texture */
     const SkIRect* contentArea() { return fContentArea.getMaybeNull(); }