Clean up SkImageFilter.

Rename more occurences of 'target' to 'kernelOffset'.
This is a follow-up patch to
https://codereview.chromium.org/182983003/

BUG=skia:2187
R=senorblanco@chromium.org

Author: dominikg@chromium.org

Review URL: https://codereview.chromium.org/197013003

git-svn-id: http://skia.googlecode.com/svn/trunk@13768 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/MatrixConvolutionBench.cpp b/bench/MatrixConvolutionBench.cpp
index 8252973..77910c9 100644
--- a/bench/MatrixConvolutionBench.cpp
+++ b/bench/MatrixConvolutionBench.cpp
@@ -22,8 +22,8 @@
             SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
         };
         SkScalar gain = 0.3f, bias = SkIntToScalar(100);
-        SkIPoint target = SkIPoint::Make(1, 1);
-        fFilter = SkMatrixConvolutionImageFilter::Create(kernelSize, kernel, gain, bias, target, tileMode, convolveAlpha);
+        SkIPoint kernelOffset = SkIPoint::Make(1, 1);
+        fFilter = SkMatrixConvolutionImageFilter::Create(kernelSize, kernel, gain, bias, kernelOffset, tileMode, convolveAlpha);
     }
 
     ~MatrixConvolutionBench() {
diff --git a/gm/matrixconvolution.cpp b/gm/matrixconvolution.cpp
index 5976a40..c37f7ad 100644
--- a/gm/matrixconvolution.cpp
+++ b/gm/matrixconvolution.cpp
@@ -45,7 +45,7 @@
         return make_isize(500, 300);
     }
 
-    void draw(SkCanvas* canvas, int x, int y, const SkIPoint& target,
+    void draw(SkCanvas* canvas, int x, int y, const SkIPoint& kernelOffset,
               SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha,
               const SkImageFilter::CropRect* cropRect = NULL) {
         SkScalar kernel[9] = {
@@ -61,7 +61,7 @@
                                                    kernel,
                                                    gain,
                                                    bias,
-                                                   target,
+                                                   kernelOffset,
                                                    tileMode,
                                                    convolveAlpha,
                                                    NULL,
@@ -83,22 +83,22 @@
             fInitialized = true;
         }
         canvas->clear(0x00000000);
-        SkIPoint target = SkIPoint::Make(1, 0);
+        SkIPoint kernelOffset = SkIPoint::Make(1, 0);
         for (int x = 10; x < 310; x += 100) {
-            this->draw(canvas, x, 10, target, MCIF::kClamp_TileMode, true);
-            this->draw(canvas, x, 110, target, MCIF::kClampToBlack_TileMode, true);
-            this->draw(canvas, x, 210, target, MCIF::kRepeat_TileMode, true);
-            target.fY++;
+            this->draw(canvas, x, 10, kernelOffset, MCIF::kClamp_TileMode, true);
+            this->draw(canvas, x, 110, kernelOffset, MCIF::kClampToBlack_TileMode, true);
+            this->draw(canvas, x, 210, kernelOffset, MCIF::kRepeat_TileMode, true);
+            kernelOffset.fY++;
         }
-        target.fY = 1;
+        kernelOffset.fY = 1;
         SkImageFilter::CropRect rect(SkRect::MakeXYWH(10, 5, 60, 60));
-        this->draw(canvas, 310, 10, target, MCIF::kClamp_TileMode, true, &rect);
-        this->draw(canvas, 310, 110, target, MCIF::kClampToBlack_TileMode, true, &rect);
-        this->draw(canvas, 310, 210, target, MCIF::kRepeat_TileMode, true, &rect);
+        this->draw(canvas, 310, 10, kernelOffset, MCIF::kClamp_TileMode, true, &rect);
+        this->draw(canvas, 310, 110, kernelOffset, MCIF::kClampToBlack_TileMode, true, &rect);
+        this->draw(canvas, 310, 210, kernelOffset, MCIF::kRepeat_TileMode, true, &rect);
 
-        this->draw(canvas, 410, 10, target, MCIF::kClamp_TileMode, false);
-        this->draw(canvas, 410, 110, target, MCIF::kClampToBlack_TileMode, false);
-        this->draw(canvas, 410, 210, target, MCIF::kRepeat_TileMode, false);
+        this->draw(canvas, 410, 10, kernelOffset, MCIF::kClamp_TileMode, false);
+        this->draw(canvas, 410, 110, kernelOffset, MCIF::kClampToBlack_TileMode, false);
+        this->draw(canvas, 410, 210, kernelOffset, MCIF::kRepeat_TileMode, false);
     }
 
 private:
diff --git a/src/effects/SkMatrixConvolutionImageFilter.cpp b/src/effects/SkMatrixConvolutionImageFilter.cpp
index 9e4ad63..679764a 100644
--- a/src/effects/SkMatrixConvolutionImageFilter.cpp
+++ b/src/effects/SkMatrixConvolutionImageFilter.cpp
@@ -412,7 +412,7 @@
     UniformHandle       fBoundsUni;
     UniformHandle       fKernelUni;
     UniformHandle       fImageIncrementUni;
-    UniformHandle       fTargetUni;
+    UniformHandle       fKernelOffsetUni;
     UniformHandle       fGainUni;
     UniformHandle       fBiasUni;
 
@@ -467,15 +467,15 @@
                                              kFloat_GrSLType,
                                              "Kernel",
                                              fKernelSize.width() * fKernelSize.height());
-    fTargetUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
-                                             kVec2f_GrSLType, "Target");
+    fKernelOffsetUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
+                                             kVec2f_GrSLType, "KernelOffset");
     fGainUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                    kFloat_GrSLType, "Gain");
     fBiasUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                    kFloat_GrSLType, "Bias");
 
     const char* bounds = builder->getUniformCStr(fBoundsUni);
-    const char* kernelOffset = builder->getUniformCStr(fTargetUni);
+    const char* kernelOffset = builder->getUniformCStr(fKernelOffsetUni);
     const char* imgInc = builder->getUniformCStr(fImageIncrementUni);
     const char* kernel = builder->getUniformCStr(fKernelUni);
     const char* gain = builder->getUniformCStr(fGainUni);
@@ -545,7 +545,7 @@
     imageIncrement[0] = 1.0f / texture.width();
     imageIncrement[1] = ySign / texture.height();
     uman.set2fv(fImageIncrementUni, 1, imageIncrement);
-    uman.set2fv(fTargetUni, 1, conv.kernelOffset());
+    uman.set2fv(fKernelOffsetUni, 1, conv.kernelOffset());
     uman.set1fv(fKernelUni, fKernelSize.width() * fKernelSize.height(), conv.kernel());
     uman.set1f(fGainUni, conv.gain());
     uman.set1f(fBiasUni, conv.bias());