GPU implementation of drawRegion()

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index a6c8a1fc74fceb34ff86038324c78d25368c2fa0..031219459fbbd227adc84fa8d255e3dd787c2184 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -526,6 +526,30 @@ void SkGpuDevice::drawDRRect(const SkDraw& draw, const SkRRect& outer,
 
 /////////////////////////////////////////////////////////////////////////////
 
+static inline bool is_int(float x) {
+    return x == (float) sk_float_round2int(x);
+}
+
+void SkGpuDevice::drawRegion(const SkDraw& draw, const SkRegion& region, const SkPaint& paint) {
+    bool isNonTranslate = draw.fMatrix->getType() & ~(SkMatrix::kTranslate_Mask);

[bsalomon, 2016/08/25 17:49:02]

I think we should handle all the matrix, aa, and style stuff in GrDrawContext.
I'd just handle the mask filter bail out here.

GrDrawContext::drawRegion(clip, grpaint, matrix, region, GrStyle(paint))

in GrDC GrStyle can be queried using GrStyle::isSimpleFill() which will return
true if it is fill w/ no path effect.

[msarett, 2016/08/25 20:51:42]

SGTM, done.

+    bool complexPaint = paint.getStyle() != SkPaint::kFill_Style || paint.getMaskFilter() ||
+                        paint.getPathEffect();
+    bool antiAlias = paint.isAntiAlias() && (!is_int(draw.fMatrix->getTranslateX()) ||
+                                             !is_int(draw.fMatrix->getTranslateY()));
+    if (isNonTranslate || complexPaint || antiAlias) {
+        SkPath path;
+        region.getBoundaryPath(&path);
+        return this->drawPath(draw, path, paint, nullptr, false);
+    }
+
+    GrPaint grPaint;
+    if (!SkPaintToGrPaint(this->context(), fDrawContext.get(), paint, *draw.fMatrix, &grPaint)) {
+        return;
+    }
+
+    fDrawContext->drawRegion(fClip, grPaint, *draw.fMatrix, region);
+}
+
 void SkGpuDevice::drawOval(const SkDraw& draw, const SkRect& oval, const SkPaint& paint) {
     ASSERT_SINGLE_OWNER
     GR_CREATE_TRACE_MARKER_CONTEXT("SkGpuDevice", "drawOval", fContext);