Add flag for window rectangles to GrRenderTarget

src/gpu/GrRenderTargetProxy.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrRenderTargetProxy.h"
 
+#include "GrCaps.h"
 #include "GrDrawTarget.h"
 #include "GrGpuResourcePriv.h"
-#include "GrRenderTargetPriv.h"
 
-GrRenderTargetProxy::GrRenderTargetProxy(sk_sp<GrRenderTarget> rt)
+// Deferred version
+// TODO: we can probably munge the 'desc' in both the wrapped and deferred
+// cases to make the sampleConfig/numSamples stuff more rational.
+GrRenderTargetProxy::GrRenderTargetProxy(const GrCaps& caps, const GrSurfaceDesc& desc,
+                                         SkBackingFit fit, SkBudgeted budgeted)
+    : INHERITED(desc, fit, budgeted)
+    , fTarget(nullptr)
+    , fFlags(GrRenderTargetPriv::Flags::kNone)
+    , fLastDrawTarget(nullptr) {
+    // Since we know the newly created render target will be internal, we are able to precompute
+    // what the flags will ultimately end up being.
+    if (caps.usesMixedSamples() && fDesc.fSampleCnt > 0) {
+        fFlags |= GrRenderTargetPriv::Flags::kMixedSampled;
+    }
+    if (caps.maxWindowRectangles() > 0) {
+        fFlags |= GrRenderTargetPriv::Flags::kWindowRectsSupport;
+    }
+}
+
+// Wrapped version
+GrRenderTargetProxy::GrRenderTargetProxy(const GrCaps& caps, sk_sp<GrRenderTarget> rt)
     : INHERITED(rt->desc(), SkBackingFit::kExact, rt->resourcePriv().isBudgeted())
     , fTarget(std::move(rt))
-    , fSampleConfig(fTarget->renderTargetPriv().sampleConfig())
+    , fFlags(fTarget->renderTargetPriv().flags())
     , fLastDrawTarget(nullptr) {
 }
 
 GrRenderTargetProxy::~GrRenderTargetProxy() {
     if (fLastDrawTarget) {
         fLastDrawTarget->clearRT();
     }
     SkSafeUnref(fLastDrawTarget);
 }
 
@@ skipping 12 matching lines @@
     } else {
         tex.reset(texProvider->createTexture(desc, fBudgeted));
     }
     if (!tex || !tex->asRenderTarget()) {
         return nullptr;
     }
 
     fTarget = sk_ref_sp(tex->asRenderTarget());
 
     // Check that our a priori computation matched the ultimate reality
-    SkASSERT(fSampleConfig == fTarget->renderTargetPriv().sampleConfig());
+    SkASSERT(fFlags == fTarget->renderTargetPriv().flags());
 
     return fTarget.get();
 }
 
 void GrRenderTargetProxy::setLastDrawTarget(GrDrawTarget* dt) {
     if (fLastDrawTarget) {
         // The non-MDB world never closes so we can't check this condition
 #ifdef ENABLE_MDB
         SkASSERT(fLastDrawTarget->isClosed());
 #endif
         fLastDrawTarget->clearRT();
     }
 
     SkRefCnt_SafeAssign(fLastDrawTarget, dt);
 }
 
 sk_sp<GrRenderTargetProxy> GrRenderTargetProxy::Make(const GrCaps& caps,
                                                      const GrSurfaceDesc& desc,
                                                      SkBackingFit fit,
                                                      SkBudgeted budgeted) {
     return sk_sp<GrRenderTargetProxy>(new GrRenderTargetProxy(caps, desc, fit, budgeted));
 }
 
-sk_sp<GrRenderTargetProxy> GrRenderTargetProxy::Make(sk_sp<GrRenderTarget> rt) {
-    return sk_sp<GrRenderTargetProxy>(new GrRenderTargetProxy(rt));
+sk_sp<GrRenderTargetProxy> GrRenderTargetProxy::Make(const GrCaps& caps, sk_sp<GrRenderTarget> rt) {
+    return sk_sp<GrRenderTargetProxy>(new GrRenderTargetProxy(caps, rt));
 }