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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 "GrGpu.h"
     14 #include "GrStencilBuffer.h"
     15 
     16 SK_DEFINE_INST_COUNT(GrRenderTarget)
     17 
     18 bool GrRenderTarget::readPixels(int left, int top, int width, int height,
     19                                 GrPixelConfig config,
     20                                 void* buffer,
     21                                 size_t rowBytes,
     22                                 uint32_t pixelOpsFlags) {
     23     // go through context so that all necessary flushing occurs
     24     GrContext* context = this->getContext();
     25     if (NULL == context) {
     26         return false;
     27     }
     28     return context->readRenderTargetPixels(this,
     29                                            left, top, width, height,
     30                                            config, buffer, rowBytes,
     31                                            pixelOpsFlags);
     32 }
     33 
     34 void GrRenderTarget::writePixels(int left, int top, int width, int height,
     35                                  GrPixelConfig config,
     36                                  const void* buffer,
     37                                  size_t rowBytes,
     38                                  uint32_t pixelOpsFlags) {
     39     // go through context so that all necessary flushing occurs
     40     GrContext* context = this->getContext();
     41     if (NULL == context) {
     42         return;
     43     }
     44     context->writeRenderTargetPixels(this,
     45                                      left, top, width, height,
     46                                      config, buffer, rowBytes,
     47                                      pixelOpsFlags);
     48 }
     49 
     50 void GrRenderTarget::resolve() {
     51     // go through context so that all necessary flushing occurs
     52     GrContext* context = this->getContext();
     53     if (NULL == context) {
     54         return;
     55     }
     56     context->resolveRenderTarget(this);
     57 }
     58 
     59 size_t GrRenderTarget::sizeInBytes() const {
     60     int colorBits;
     61     if (kUnknown_GrPixelConfig == fDesc.fConfig) {
     62         colorBits = 32; // don't know, make a guess
     63     } else {
     64         colorBits = GrBytesPerPixel(fDesc.fConfig);
     65     }
     66     uint64_t size = fDesc.fWidth;
     67     size *= fDesc.fHeight;
     68     size *= colorBits;
     69     size *= GrMax(1, fDesc.fSampleCnt);
     70     return (size_t)(size / 8);
     71 }
     72 
     73 void GrRenderTarget::flagAsNeedingResolve(const SkIRect* rect) {
     74     if (kCanResolve_ResolveType == getResolveType()) {
     75         if (NULL != rect) {
     76             fResolveRect.join(*rect);
     77             if (!fResolveRect.intersect(0, 0, this->width(), this->height())) {
     78                 fResolveRect.setEmpty();
     79             }
     80         } else {
     81             fResolveRect.setLTRB(0, 0, this->width(), this->height());
     82         }
     83     }
     84 }
     85 
     86 void GrRenderTarget::overrideResolveRect(const SkIRect rect) {
     87     fResolveRect = rect;
     88     if (fResolveRect.isEmpty()) {
     89         fResolveRect.setLargestInverted();
     90     } else {
     91         if (!fResolveRect.intersect(0, 0, this->width(), this->height())) {
     92             fResolveRect.setLargestInverted();
     93         }
     94     }
     95 }
     96 
     97 void GrRenderTarget::setStencilBuffer(GrStencilBuffer* stencilBuffer) {
     98     SkRefCnt_SafeAssign(fStencilBuffer, stencilBuffer);
     99 }
    100 
    101 void GrRenderTarget::onRelease() {
    102     this->setStencilBuffer(NULL);
    103 
    104     INHERITED::onRelease();
    105 }
    106 
    107 void GrRenderTarget::onAbandon() {
    108     this->setStencilBuffer(NULL);
    109 
    110     INHERITED::onAbandon();
    111 }
    112