Add SkImage->draw() call with src and dst rects.

gm/image.cpp

Index: gm/image.cpp
diff --git a/gm/image.cpp b/gm/image.cpp
index 71fe0e176f094bdab2f047f93f79f2eb640cb6c0..df50e0be18fa9d5feb0a59ec3d29a66e2c4e36ee 100644
--- a/gm/image.cpp
+++ b/gm/image.cpp
@@ -91,6 +91,22 @@ static void test_surface(SkCanvas* canvas, SkSurface* surf) {
     imgG->draw(canvas, 0, 80, &paint);
     surf->draw(canvas, 0, 160, &paint);
 
+    SkRect src1, src2, src3;
+    src1.set(0, 0, surf->width(), surf->height());
+    src2.set(-surf->width() / 2, -surf->height() / 2, surf->width(), surf->height());
+    src3.set(0, 0, surf->width() / 2, surf->height() / 2);
+
+    SkRect dst1, dst2, dst3, dst4;
+    dst1.set(0, 240, 65, 305);
+    dst2.set(0, 320, 65, 385);
+    dst3.set(0, 400, 65, 465);
+    dst4.set(0, 480, 65, 545);
+
+    imgR->draw(canvas, &src1, dst1, &paint);
+    imgG->draw(canvas, &src2, dst2, &paint);
+    imgR->draw(canvas, &src3, dst3, &paint);
+    imgG->draw(canvas, NULL, dst4, &paint);
+
     imgG->unref();
     imgR->unref();
 }
@@ -122,7 +138,7 @@ protected:
     }
 
     virtual SkISize onISize() {
-        return SkISize::Make(800, 500);
+        return SkISize::Make(800, 1200);
     }
 
     virtual void onDraw(SkCanvas* canvas) {
@@ -133,22 +149,30 @@ protected:
         static const char* kLabel1 = "Original Img";
         static const char* kLabel2 = "Modified Img";
         static const char* kLabel3 = "Cur Surface";
+        static const char* kLabel4 = "Full Crop";
+        static const char* kLabel5 = "Over-crop";
+        static const char* kLabel6 = "Upper-left";
+        static const char* kLabel7 = "No Crop";
 
-        static const char* kLabel4 = "Pre-Alloc Img";
-        static const char* kLabel5 = "New Alloc Img";
-        static const char* kLabel6 = "SkPicture";
-        static const char* kLabel7 = "GPU";
+        static const char* kLabel8 = "Pre-Alloc Img";
+        static const char* kLabel9 = "New Alloc Img";
+        static const char* kLabel10 = "SkPicture";
+        static const char* kLabel11 = "GPU";
 
         SkPaint textPaint;
 
         canvas->drawText(kLabel1, strlen(kLabel1), 10,  60, textPaint);
         canvas->drawText(kLabel2, strlen(kLabel2), 10, 140, textPaint);
         canvas->drawText(kLabel3, strlen(kLabel3), 10, 220, textPaint);
-
-        canvas->drawText(kLabel4, strlen(kLabel4),  80, 10, textPaint);
-        canvas->drawText(kLabel5, strlen(kLabel5), 160, 10, textPaint);
-        canvas->drawText(kLabel6, strlen(kLabel6), 250, 10, textPaint);
-        canvas->drawText(kLabel7, strlen(kLabel7), 340, 10, textPaint);
+        canvas->drawText(kLabel4, strlen(kLabel4), 10, 300, textPaint);
+        canvas->drawText(kLabel5, strlen(kLabel5), 10, 380, textPaint);
+        canvas->drawText(kLabel6, strlen(kLabel6), 10, 460, textPaint);
+        canvas->drawText(kLabel7, strlen(kLabel7), 10, 540, textPaint);
+
+        canvas->drawText(kLabel8, strlen(kLabel8),  80, 10, textPaint);
+        canvas->drawText(kLabel9, strlen(kLabel9), 160, 10, textPaint);
+        canvas->drawText(kLabel10, strlen(kLabel10), 250, 10, textPaint);
+        canvas->drawText(kLabel11, strlen(kLabel11), 340, 10, textPaint);
 
         canvas->translate(80, 20);