abstract access to device-clip-bounds

apply this to GpuDevice. Should allow us to switch to per-device-clipping
with minimal change (since we've abstracted how the device sees its
clip-bounds.)

BUG=skia:

Change-Id: I5245d90f308c21abdb58d441c326670b65e9179d
Reviewed-on: https://skia-review.googlesource.com/8884
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/core/SkClipStackDevice.cpp b/src/core/SkClipStackDevice.cpp
index e1014e98b6..799850b839 100644
--- a/src/core/SkClipStackDevice.cpp
+++ b/src/core/SkClipStackDevice.cpp
@@ -6,6 +6,8 @@
  */
 
 #include "SkClipStackDevice.h"
+#include "SkDraw.h"
+#include "SkRasterClip.h"
 
 void SkClipStackDevice::onSave() {
     fClipStack.save();
@@ -49,3 +51,14 @@ void SkClipStackDevice::onSetDeviceClipRestriction(SkIRect* clipRestriction) {
         fClipStack.clipDevRect(rect, SkClipOp::kIntersect);
     }
 }
+
+SkIRect SkClipStackDevice::devClipBounds(const SkDraw& draw) const {
+#ifdef SK_USE_DEVICE_CLIPPING
+    SkIRect r = fClipStack.bounds(this->imageInfo().bounds()).roundOut();
+    SkASSERT(this->imageInfo().bounds().contains(r));
+    SkASSERT(draw.fRC->getBounds().contains(r));
+    return r;
+#else
+    return draw.fRC->getBounds();
+#endif
+}