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
16bool GrRenderTarget::readPixels(int left, int top, int width, int height,
17                                GrPixelConfig config,
18                                void* buffer,
19                                size_t rowBytes,
20                                uint32_t pixelOpsFlags) {
21    // go through context so that all necessary flushing occurs
22    GrContext* context = this->getContext();
23    if (NULL == context) {
24        return false;
25    }
26    return context->readRenderTargetPixels(this,
27                                           left, top, width, height,
28                                           config, buffer, rowBytes,
29                                           pixelOpsFlags);
30}
31
32void GrRenderTarget::writePixels(int left, int top, int width, int height,
33                                 GrPixelConfig config,
34                                 const void* buffer,
35                                 size_t rowBytes,
36                                 uint32_t pixelOpsFlags) {
37    // go through context so that all necessary flushing occurs
38    GrContext* context = this->getContext();
39    if (NULL == context) {
40        return;
41    }
42    context->writeRenderTargetPixels(this,
43                                     left, top, width, height,
44                                     config, buffer, rowBytes,
45                                     pixelOpsFlags);
46}
47
48void GrRenderTarget::resolve() {
49    // go through context so that all necessary flushing occurs
50    GrContext* context = this->getContext();
51    if (NULL == context) {
52        return;
53    }
54    context->resolveRenderTarget(this);
55}
56
57void GrRenderTarget::discard() {
58    // go through context so that all necessary flushing occurs
59    GrContext* context = this->getContext();
60    if (NULL == context) {
61        return;
62    }
63    context->discardRenderTarget(this);
64}
65
66size_t GrRenderTarget::gpuMemorySize() const {
67    size_t colorBits;
68    if (kUnknown_GrPixelConfig == fDesc.fConfig) {
69        colorBits = 32; // don't know, make a guess
70    } else {
71        colorBits = GrBytesPerPixel(fDesc.fConfig);
72    }
73    uint64_t size = fDesc.fWidth;
74    size *= fDesc.fHeight;
75    size *= colorBits;
76    size *= SkTMax(1, fDesc.fSampleCnt);
77    return (size_t)(size / 8);
78}
79
80void GrRenderTarget::flagAsNeedingResolve(const SkIRect* rect) {
81    if (kCanResolve_ResolveType == getResolveType()) {
82        if (NULL != rect) {
83            fResolveRect.join(*rect);
84            if (!fResolveRect.intersect(0, 0, this->width(), this->height())) {
85                fResolveRect.setEmpty();
86            }
87        } else {
88            fResolveRect.setLTRB(0, 0, this->width(), this->height());
89        }
90    }
91}
92
93void GrRenderTarget::overrideResolveRect(const SkIRect rect) {
94    fResolveRect = rect;
95    if (fResolveRect.isEmpty()) {
96        fResolveRect.setLargestInverted();
97    } else {
98        if (!fResolveRect.intersect(0, 0, this->width(), this->height())) {
99            fResolveRect.setLargestInverted();
100        }
101    }
102}
103
104void GrRenderTarget::setStencilBuffer(GrStencilBuffer* stencilBuffer) {
105    SkRefCnt_SafeAssign(fStencilBuffer, stencilBuffer);
106}
107
108void GrRenderTarget::onRelease() {
109    this->setStencilBuffer(NULL);
110
111    INHERITED::onRelease();
112}
113
114void GrRenderTarget::onAbandon() {
115    this->setStencilBuffer(NULL);
116
117    INHERITED::onAbandon();
118}
119