add tiler for SkDraw

Bug: skia:2122
Change-Id: I276de2064939151eef5fa14c53188e8b5728b7c9
Reviewed-on: https://skia-review.googlesource.com/110840
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Yuqian Li <liyuqian@google.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/gm/hugepath.cpp b/gm/hugepath.cpp
index 83dff9ec3e..4a691b8182 100644
--- a/gm/hugepath.cpp
+++ b/gm/hugepath.cpp
@@ -8,6 +8,7 @@
 #include "gm.h"
 #include "SkCanvas.h"
 #include "SkPath.h"
+#include "SkSurface.h"
 
 DEF_SIMPLE_GM(path_huge_crbug_800804, canvas, 50, 600) {
     SkPaint paint;
@@ -35,3 +36,35 @@ DEF_SIMPLE_GM(path_huge_crbug_800804, canvas, 50, 600) {
     }
 }
 
+// Test that we can draw into a huge surface ( > 64K ) and still retain paths and antialiasing.
+DEF_SIMPLE_GM(path_huge_aa, canvas, 200, 200) {
+    auto proc = [](SkCanvas* canvas, int w, int h) {
+        SkAutoCanvasRestore acr(canvas, true);
+
+        auto surf = SkSurface::MakeRasterN32Premul(w, h);
+        auto can = surf->getCanvas();
+
+        SkPaint paint;
+        SkPath path;
+        path.addRoundRect(SkRect::MakeXYWH(4, 4, w - 8, h - 8), 12, 12);
+
+        canvas->save();
+        canvas->clipRect(SkRect::MakeXYWH(4, 4, 64, 64));
+        can->drawPath(path, paint);
+        surf->draw(canvas, 64 - w, 0, nullptr);
+        canvas->restore();
+
+        canvas->translate(80, 0);
+        canvas->save();
+        canvas->clipRect(SkRect::MakeXYWH(4, 4, 64, 64));
+        can->clear(0);
+        paint.setAntiAlias(true);
+        can->drawPath(path, paint);
+        surf->draw(canvas, 64 - w, 0, nullptr);
+        canvas->restore();
+    };
+
+    proc(canvas, 100, 60);
+    canvas->translate(0, 80);
+    proc(canvas, 100 * 1024, 60);
+}