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Unified Diff: src/core/SkAAClip.cpp

Issue 443353004: add isRect() check to AAClip, to detect if a soft-clip is really just an irect (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 6 years, 4 months ago
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Index: src/core/SkAAClip.cpp
diff --git a/src/core/SkAAClip.cpp b/src/core/SkAAClip.cpp
index 14152f8317ef6a0167b7399d0927528aafd4b990..5d21a47a49470e6f2d85845021cbbed3b76b26bb 100644
--- a/src/core/SkAAClip.cpp
+++ b/src/core/SkAAClip.cpp
@@ -684,6 +684,34 @@ bool SkAAClip::setRect(const SkIRect& bounds) {
#endif
}
+bool SkAAClip::isRect() const {
+ if (this->isEmpty()) {
+ return false;
+ }
+
+ const RunHead* head = fRunHead;
+ if (head->fRowCount != 1) {
+ return false;
+ }
+ const YOffset* yoff = head->yoffsets();
+ if (yoff->fY != fBounds.fBottom - 1) {
+ return false;
+ }
+
+ const uint8_t* row = head->data() + yoff->fOffset;
+ int width = fBounds.width();
+ do {
+ if (row[1] != 0xFF) {
+ return false;
+ }
+ int n = row[0];
+ SkASSERT(n <= width);
+ width -= n;
+ row += 2;
+ } while (width > 0);
+ return true;
+}
+
bool SkAAClip::setRect(const SkRect& r, bool doAA) {
if (r.isEmpty()) {
return this->setEmpty();
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