Implement crop rect for lighting image filters.

gm/lighting.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 "gm.h"
 #include "SkLightingImageFilter.h"
 
 #define WIDTH 330
-#define HEIGHT 220
+#define HEIGHT 440
 
 namespace skiagm {
 
 class ImageLightingGM : public GM {
 public:
     ImageLightingGM() : fInitialized(false) {
         this->setBGColor(0xFF000000);
     }
 
 protected:
@@ skipping 53 matching lines @@
         SkPoint3 spotLocation(SkIntToScalar(-10), SkIntToScalar(-10), SkIntToScalar(20));
         SkPoint3 spotTarget(SkIntToScalar(40), SkIntToScalar(40), 0);
         SkScalar spotExponent = SK_Scalar1;
         SkScalar cutoffAngle = SkIntToScalar(15);
         SkScalar kd = SkIntToScalar(2);
         SkScalar ks = SkIntToScalar(1);
         SkScalar shininess = SkIntToScalar(8);
         SkScalar surfaceScale = SkIntToScalar(1);
         SkColor white(0xFFFFFFFF);
         SkPaint paint;
-        paint.setImageFilter(SkLightingImageFilter::CreatePointLitDiffuse(pointLocation, white, surfaceScale, kd))->unref();
-        drawClippedBitmap(canvas, paint, 0, 0);
-        paint.setImageFilter(SkLightingImageFilter::CreateDistantLitDiffuse(distantDirection, white, surfaceScale, kd))->unref();
-        drawClippedBitmap(canvas, paint, 110, 0);
-        paint.setImageFilter(SkLightingImageFilter::CreateSpotLitDiffuse(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, kd))->unref();
-        drawClippedBitmap(canvas, paint, 220, 0);
-        paint.setImageFilter(SkLightingImageFilter::CreatePointLitSpecular(pointLocation, white, surfaceScale, ks, shininess))->unref();
-        drawClippedBitmap(canvas, paint, 0, 110);
-        paint.setImageFilter(SkLightingImageFilter::CreateDistantLitSpecular(distantDirection, white, surfaceScale, ks, shininess))->unref();
-        drawClippedBitmap(canvas, paint, 110, 110);
-        paint.setImageFilter(SkLightingImageFilter::CreateSpotLitSpecular(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, ks, shininess))->unref();
-        drawClippedBitmap(canvas, paint, 220, 110);
+
+        SkIRect cropRect = SkIRect::MakeXYWH(20, 10, 60, 65);
+
+        int y = 0;
+        for (int i = 0; i < 2; i++) {
+            const SkIRect* cr = (i == 0) ? NULL : &cropRect;
+            paint.setImageFilter(SkLightingImageFilter::CreatePointLitDiffuse(pointLocation, white, surfaceScale, kd, NULL, cr))->unref();
+            drawClippedBitmap(canvas, paint, 0, y);
+            paint.setImageFilter(SkLightingImageFilter::CreateDistantLitDiffuse(distantDirection, white, surfaceScale, kd, NULL, cr))->unref();
+            drawClippedBitmap(canvas, paint, 110, y);
+            paint.setImageFilter(SkLightingImageFilter::CreateSpotLitDiffuse(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, kd, NULL, cr))->unref();
+            drawClippedBitmap(canvas, paint, 220, y);
+
+            y += 110;
+            paint.setImageFilter(SkLightingImageFilter::CreatePointLitSpecular(pointLocation, white, surfaceScale, ks, shininess, NULL, cr))->unref();
+            drawClippedBitmap(canvas, paint, 0, y);
+            paint.setImageFilter(SkLightingImageFilter::CreateDistantLitSpecular(distantDirection, white, surfaceScale, ks, shininess, NULL, cr))->unref();
+            drawClippedBitmap(canvas, paint, 110, y);
+            paint.setImageFilter(SkLightingImageFilter::CreateSpotLitSpecular(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, ks, shininess, NULL, cr))->unref();
+            drawClippedBitmap(canvas, paint, 220, y);
+            y += 110;
+        }
     }
 
 private:
     typedef GM INHERITED;
     SkBitmap fBitmap;
     bool fInitialized;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new ImageLightingGM; }
 static GMRegistry reg(MyFactory);
 
 }