GrTextureRenderTargetProxy.cpp revision 76d640d14ea78e1f827a2f545e7f0729cdc2896f 
1/*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "GrTextureRenderTargetProxy.h"
9
10// Deferred version
11// This class is virtually derived from GrSurfaceProxy (via both GrTextureProxy and
12// GrRenderTargetProxy) so its constructor must be explicitly called.
13GrTextureRenderTargetProxy::GrTextureRenderTargetProxy(const GrCaps& caps,
14                                                       const GrSurfaceDesc& desc,
15                                                       SkBackingFit fit,
16                                                       SkBudgeted budgeted,
17                                                       uint32_t flags)
18    : GrSurfaceProxy(desc, fit, budgeted, flags)
19    // for now textures w/ data are always wrapped
20    , GrTextureProxy(desc, fit, budgeted, nullptr, 0, flags)
21    , GrRenderTargetProxy(caps, desc, fit, budgeted, flags) {
22}
23
24// Wrapped version
25// This class is virtually derived from GrSurfaceProxy (via both GrTextureProxy and
26// GrRenderTargetProxy) so its constructor must be explicitly called.
27GrTextureRenderTargetProxy::GrTextureRenderTargetProxy(sk_sp<GrSurface> surf,
28                                                       GrSurfaceOrigin origin)
29    : GrSurfaceProxy(surf, origin, SkBackingFit::kExact)
30    , GrTextureProxy(surf, origin)
31    , GrRenderTargetProxy(surf, origin) {
32    SkASSERT(surf->asTexture());
33    SkASSERT(surf->asRenderTarget());
34}
35
36size_t GrTextureRenderTargetProxy::onUninstantiatedGpuMemorySize() const {
37    int colorSamplesPerPixel = this->numColorSamples() + 1;
38
39    static const bool kHasMipMaps = true;
40    // TODO: add tracking of mipmap state to improve the estimate. We track whether we are created
41    // with mip maps but not whether a texture read from the proxy will lazily generate mip maps.
42
43    // TODO: do we have enough information to improve this worst case estimate?
44    return GrSurface::ComputeSize(fConfig, fWidth, fHeight, colorSamplesPerPixel, kHasMipMaps,
45                                  SkBackingFit::kApprox == fFit);
46}
47
48bool GrTextureRenderTargetProxy::instantiate(GrResourceProvider* resourceProvider) {
49    static constexpr GrSurfaceFlags kFlags = kRenderTarget_GrSurfaceFlag;
50
51    if (!this->instantiateImpl(resourceProvider, this->numStencilSamples(), this->needsStencil(),
52                               kFlags, this->isMipMapped(), this->mipColorMode())) {
53        return false;
54    }
55    SkASSERT(fTarget->asRenderTarget());
56    SkASSERT(fTarget->asTexture());
57
58    return true;
59}
60
61sk_sp<GrSurface> GrTextureRenderTargetProxy::createSurface(
62                                                    GrResourceProvider* resourceProvider) const {
63    static constexpr GrSurfaceFlags kFlags = kRenderTarget_GrSurfaceFlag;
64
65    sk_sp<GrSurface> surface = this->createSurfaceImpl(resourceProvider, this->numStencilSamples(),
66                                                       this->needsStencil(), kFlags,
67                                                       this->isMipMapped(), this->mipColorMode());
68    if (!surface) {
69        return nullptr;
70    }
71    SkASSERT(surface->asRenderTarget());
72    SkASSERT(surface->asTexture());
73
74    return surface;
75}
76
77