Create blurred RRect mask on GPU (rather than uploading it)

This CL doesn't try to resolve any of the larger issues. It just moves the computation of the blurred RRect to the gpu and sets up to start using vertex attributes for a nine patch draw (i.e., returning the texture coordinates)

All blurred rrects using the "analytic" path will change slightly with this CL.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2222083004

Review-Url: https://codereview.chromium.org/2222083004

1 files changed, 62 insertions, 0 deletions

diff --git a/tests/BlurTest.cpp b/tests/BlurTest.cpp
index 6ccb0471aa..32e2930171 100644
--- a/tests/BlurTest.cpp
+++ b/tests/BlurTest.cpp
@@ -574,4 +574,66 @@ DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SmallBoxBlurBug, reporter, ctxInfo) {
 
 #endif
 
+
+DEF_TEST(BlurredRRectNinePatchComputation, reporter) {
+    const SkRect r = SkRect::MakeXYWH(10, 10, 100, 100);
+
+    bool ninePatchable;
+    SkRRect rrectToDraw;
+    SkISize size;
+    SkScalar xs[4], ys[4];
+    int numXs, numYs;
+
+    // not nine-patchable
+    {
+        SkVector radii[4] = { { 100, 100 }, { 0, 0 }, { 100, 100 }, { 0, 0 } };
+
+        SkRRect rr;
+        rr.setRectRadii(r, radii);
+
+        ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(rr, 3.0f, &rrectToDraw, &size,
+                                                                    xs, &numXs, ys, &numYs);   
+        REPORTER_ASSERT(reporter, !ninePatchable);
+    }
+
+    // simple circular
+    {
+        SkRRect rr;
+        rr.setRectXY(r, 10, 10);
+
+        ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(rr, 3.0f, &rrectToDraw, &size,
+                                                                    xs, &numXs, ys, &numYs);   
+        REPORTER_ASSERT(reporter, ninePatchable);
+        REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkIntToScalar(size.fWidth), 57.0f));
+        REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkIntToScalar(size.fHeight), 57.0));
+        REPORTER_ASSERT(reporter, 4 == numXs && 4 == numYs);
+        for (int i = 0; i < numXs; ++i) {
+            REPORTER_ASSERT(reporter, xs[i] >= 0.0f && xs[i] <= 1.0f);
+        }
+        for (int i = 0; i < numYs; ++i) {
+            REPORTER_ASSERT(reporter, ys[i] >= 0.0f && ys[i] <= 1.0f);
+        }
+    }
+
+    // simple elliptical
+    {
+        SkRRect rr;
+        rr.setRectXY(r, 2, 10);
+
+        ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(rr, 3.0f, &rrectToDraw, &size,
+                                                                    xs, &numXs, ys, &numYs);   
+        REPORTER_ASSERT(reporter, ninePatchable);
+        REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkIntToScalar(size.fWidth), 41.0f));
+        REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkIntToScalar(size.fHeight), 57.0));
+        REPORTER_ASSERT(reporter, 4 == numXs && 4 == numYs);
+        for (int i = 0; i < numXs; ++i) {
+            REPORTER_ASSERT(reporter, xs[i] >= 0.0f && xs[i] <= 1.0f);
+        }
+        for (int i = 0; i < numYs; ++i) {
+            REPORTER_ASSERT(reporter, ys[i] >= 0.0f && ys[i] <= 1.0f);
+        }
+    }
+
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////