Add a deferred copy surface

This CL forces all GrSurface copies to go through a GrSurfaceContext (rather than GrContext).

There is a bit of goofiness going on here until read/writePixels is also consolidated in GrSurfaceContext and a proxy-backed SkImage/SkSurface is added.

Change-Id: Iab1867668d8146a766201158a251b9174438ee2b
Reviewed-on: https://skia-review.googlesource.com/5773
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

1 files changed, 19 insertions, 6 deletions

diff --git a/src/gpu/GrTextureContext.cpp b/src/gpu/GrTextureContext.cpp
index 22620fed0f..28240f8a79 100644
--- a/src/gpu/GrTextureContext.cpp
+++ b/src/gpu/GrTextureContext.cpp
@@ -24,8 +24,7 @@ GrTextureContext::GrTextureContext(GrContext* context,
     : GrSurfaceContext(context, auditTrail, singleOwner)
     , fDrawingManager(drawingMgr)
     , fTextureProxy(std::move(textureProxy))
-    , fOpList(SkSafeRef(fTextureProxy->getLastTextureOpList()))
-{
+    , fOpList(SkSafeRef(fTextureProxy->getLastTextureOpList())) {
     SkDEBUGCODE(this->validate();)
 }
 
@@ -56,12 +55,26 @@ GrTextureOpList* GrTextureContext::getOpList() {
     return fOpList;
 }
 
-bool GrTextureContext::copySurface(GrSurface* src, const SkIRect& srcRect,
-                                   const SkIPoint& dstPoint) {
+// TODO: move this (and GrRenderTargetContext::copy) to GrSurfaceContext?
+bool GrTextureContext::onCopy(GrSurfaceProxy* srcProxy,
+                              const SkIRect& srcRect,
+                              const SkIPoint& dstPoint) {
     ASSERT_SINGLE_OWNER
     RETURN_FALSE_IF_ABANDONED
     SkDEBUGCODE(this->validate();)
-    GR_AUDIT_TRAIL_AUTO_FRAME(fAuditTrail, "GrTextureContext::copySurface");
+    GR_AUDIT_TRAIL_AUTO_FRAME(fAuditTrail, "GrTextureContext::copy");
+
+    // TODO: defer instantiation until flush time
+    sk_sp<GrSurface> src(sk_ref_sp(srcProxy->instantiate(fContext->textureProvider())));
+    if (!src) {
+        return false;
+    }
+

+#ifndef ENABLE_MDB

+    // We can't yet fully defer copies to textures, so GrTextureContext::copySurface will

+    // execute the copy immediately. Ensure the data is ready.

+    src->flushWrites();

+#endif
 
     // TODO: this needs to be fixed up since it ends the deferrable of the GrTexture
     sk_sp<GrTexture> tex(sk_ref_sp(fTextureProxy->instantiate(fContext->textureProvider())));
@@ -70,7 +83,7 @@ bool GrTextureContext::copySurface(GrSurface* src, const SkIRect& srcRect,
     }
 
     GrTextureOpList* opList = this->getOpList();
-    bool result = opList->copySurface(tex.get(), src, srcRect, dstPoint);
+    bool result = opList->copySurface(tex.get(), src.get(), srcRect, dstPoint);
 
 #ifndef ENABLE_MDB
     GrOpFlushState flushState(fContext->getGpu(), nullptr);