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
57size_t GrRenderTarget::sizeInBytes() const {
58    size_t colorBits;
59    if (kUnknown_GrPixelConfig == fDesc.fConfig) {
60        colorBits = 32; // don't know, make a guess
61    } else {
62        colorBits = GrBytesPerPixel(fDesc.fConfig);
63    }
64    uint64_t size = fDesc.fWidth;
65    size *= fDesc.fHeight;
66    size *= colorBits;
67    size *= GrMax(1, fDesc.fSampleCnt);
68    return (size_t)(size / 8);
69}
70
71void GrRenderTarget::flagAsNeedingResolve(const SkIRect* rect) {
72    if (kCanResolve_ResolveType == getResolveType()) {
73        if (NULL != rect) {
74            fResolveRect.join(*rect);
75            if (!fResolveRect.intersect(0, 0, this->width(), this->height())) {
76                fResolveRect.setEmpty();
77            }
78        } else {
79            fResolveRect.setLTRB(0, 0, this->width(), this->height());
80        }
81    }
82}
83
84void GrRenderTarget::overrideResolveRect(const SkIRect rect) {
85    fResolveRect = rect;
86    if (fResolveRect.isEmpty()) {
87        fResolveRect.setLargestInverted();
88    } else {
89        if (!fResolveRect.intersect(0, 0, this->width(), this->height())) {
90            fResolveRect.setLargestInverted();
91        }
92    }
93}
94
95void GrRenderTarget::setStencilBuffer(GrStencilBuffer* stencilBuffer) {
96    SkRefCnt_SafeAssign(fStencilBuffer, stencilBuffer);
97}
98
99void GrRenderTarget::onRelease() {
100    this->setStencilBuffer(NULL);
101
102    INHERITED::onRelease();
103}
104
105void GrRenderTarget::onAbandon() {
106    this->setStencilBuffer(NULL);
107
108    INHERITED::onAbandon();
109}
110