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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 
      9 
     10 #include "GrRenderTarget.h"
     11 
     12 #include "GrContext.h"
     13 #include "GrDrawContext.h"
     14 #include "GrDrawTarget.h"
     15 #include "GrGpu.h"
     16 #include "GrRenderTargetPriv.h"
     17 #include "GrStencilAttachment.h"
     18 
     19 GrRenderTarget::~GrRenderTarget() {
     20     if (fLastDrawTarget) {
     21         fLastDrawTarget->clearRT();
     22     }
     23     SkSafeUnref(fLastDrawTarget);
     24 }
     25 
     26 void GrRenderTarget::discard() {
     27     // go through context so that all necessary flushing occurs
     28     GrContext* context = this->getContext();
     29     if (!context) {
     30         return;
     31     }
     32 
     33     SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(this));
     34     if (!drawContext) {
     35         return;
     36     }
     37 
     38     drawContext->discard();
     39 }
     40 
     41 void GrRenderTarget::flagAsNeedingResolve(const SkIRect* rect) {
     42     if (kCanResolve_ResolveType == getResolveType()) {
     43         if (rect) {
     44             fResolveRect.join(*rect);
     45             if (!fResolveRect.intersect(0, 0, this->width(), this->height())) {
     46                 fResolveRect.setEmpty();
     47             }
     48         } else {
     49             fResolveRect.setLTRB(0, 0, this->width(), this->height());
     50         }
     51     }
     52 }
     53 
     54 void GrRenderTarget::overrideResolveRect(const SkIRect rect) {
     55     fResolveRect = rect;
     56     if (fResolveRect.isEmpty()) {
     57         fResolveRect.setLargestInverted();
     58     } else {
     59         if (!fResolveRect.intersect(0, 0, this->width(), this->height())) {
     60             fResolveRect.setLargestInverted();
     61         }
     62     }
     63 }
     64 
     65 void GrRenderTarget::onRelease() {
     66     SkSafeSetNull(fStencilAttachment);
     67 
     68     INHERITED::onRelease();
     69 }
     70 
     71 void GrRenderTarget::onAbandon() {
     72     SkSafeSetNull(fStencilAttachment);
     73 
     74     // The contents of this renderTarget are gone/invalid. It isn't useful to point back
     75     // the creating drawTarget.
     76     this->setLastDrawTarget(nullptr);
     77 
     78     INHERITED::onAbandon();
     79 }
     80 
     81 void GrRenderTarget::setLastDrawTarget(GrDrawTarget* dt) {
     82     if (fLastDrawTarget) {
     83         // The non-MDB world never closes so we can't check this condition
     84 #ifdef ENABLE_MDB
     85         SkASSERT(fLastDrawTarget->isClosed());
     86 #endif
     87         fLastDrawTarget->clearRT();
     88     }
     89 
     90     SkRefCnt_SafeAssign(fLastDrawTarget, dt);
     91 }
     92 
     93 ///////////////////////////////////////////////////////////////////////////////
     94 
     95 bool GrRenderTargetPriv::attachStencilAttachment(GrStencilAttachment* stencil) {
     96     if (!stencil && !fRenderTarget->fStencilAttachment) {
     97         // No need to do any work since we currently don't have a stencil attachment and
     98         // we're not acctually adding one.
     99         return true;
    100     }
    101     fRenderTarget->fStencilAttachment = stencil;
    102     if (!fRenderTarget->completeStencilAttachment()) {
    103         SkSafeSetNull(fRenderTarget->fStencilAttachment);
    104         return false;
    105     }
    106     return true;
    107 }
    108