Fix cull nesting assertion.

Cull rects are in local coordinates and cannot be compared directly.

No wonder it was so hard enforcing this in Blink :o

This moves the validation logic into SkCanvas, using a device-space
cull stack (debug build only).

There are still some Blink bugs causing violations, so for now I'd like
to keep this as an error message only.

R=reed@google.com, robertphillips@google.com

Author: fmalita@chromium.org

Review URL: https://codereview.chromium.org/200923008

git-svn-id: http://skia.googlecode.com/svn/trunk@13885 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 0 insertions, 17 deletions

diff --git a/src/core/SkPictureRecord.cpp b/src/core/SkPictureRecord.cpp
index 55670baa73..ce21d955dd 100644
--- a/src/core/SkPictureRecord.cpp
+++ b/src/core/SkPictureRecord.cpp
@@ -1559,18 +1559,6 @@ void SkPictureRecord::endCommentGroup() {
 // [op/size] [rect] [skip offset]
 static const uint32_t kPushCullOpSize = 2 * kUInt32Size + sizeof(SkRect);
 void SkPictureRecord::onPushCull(const SkRect& cullRect) {
-    // Skip identical cull rects.
-    if (!fCullOffsetStack.isEmpty()) {
-        const SkRect& prevCull = fWriter.readTAt<SkRect>(fCullOffsetStack.top() - sizeof(SkRect));
-        if (prevCull == cullRect) {
-            // Skipped culls are tracked on the stack, but they point to the previous offset.
-            fCullOffsetStack.push(fCullOffsetStack.top());
-            return;
-        }
-
-        SkASSERT(prevCull.contains(cullRect));
-    }
-
     uint32_t size = kPushCullOpSize;
     size_t initialOffset = this->addDraw(PUSH_CULL, &size);
     // PUSH_CULL's size should stay constant (used to rewind).
@@ -1588,11 +1576,6 @@ void SkPictureRecord::onPopCull() {
     uint32_t cullSkipOffset = fCullOffsetStack.top();
     fCullOffsetStack.pop();
 
-    // Skipped push, do the same for pop.
-    if (!fCullOffsetStack.isEmpty() && cullSkipOffset == fCullOffsetStack.top()) {
-        return;
-    }
-
     // Collapse empty push/pop pairs.
     if ((size_t)(cullSkipOffset + kUInt32Size) == fWriter.bytesWritten()) {
         SkASSERT(fWriter.bytesWritten() >= kPushCullOpSize);