src/gpu/mock/GrMockTexture.h

/*
 * Copyright 2017 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#ifndef GrMockTexture_DEFINED
#define GrMockTexture_DEFINED

#include "GrMockGpu.h"
#include "GrRenderTarget.h"
#include "GrTexture.h"
#include "GrTexturePriv.h"
#include "mock/GrMockTypes.h"

class GrMockTexture : public GrTexture {
public:
    GrMockTexture(GrMockGpu* gpu, SkBudgeted budgeted, const GrSurfaceDesc& desc,
                  GrMipMapsStatus mipMapsStatus, const GrMockTextureInfo& info)
            : GrMockTexture(gpu, desc, mipMapsStatus, info) {
        this->registerWithCache(budgeted);
    }
    ~GrMockTexture() override {}

    GrBackendObject getTextureHandle() const override {
        return reinterpret_cast<GrBackendObject>(&fInfo);
    }
    GrBackendTexture getBackendTexture() const override {
        return GrBackendTexture(this->width(), this->height(), this->config(),
                                this->texturePriv().mipMapped(), fInfo);
    }

    void textureParamsModified() override {}
    void setRelease(sk_sp<GrReleaseProcHelper> releaseHelper) override {
        fReleaseHelper = std::move(releaseHelper);
    }

protected:
    // constructor for subclasses
    GrMockTexture(GrMockGpu* gpu, const GrSurfaceDesc& desc, GrMipMapsStatus mipMapsStatus,
                  const GrMockTextureInfo& info)
            : GrSurface(gpu, desc)
            , INHERITED(gpu, desc, kITexture2DSampler_GrSLType, GrSamplerState::Filter::kMipMap,
                        mipMapsStatus)
            , fInfo(info) {}

    bool onStealBackendTexture(GrBackendTexture*, SkImage::BackendTextureReleaseProc*) override {
        return false;
    }

private:
    GrMockTextureInfo          fInfo;
    sk_sp<GrReleaseProcHelper> fReleaseHelper;

    typedef GrTexture INHERITED;
};

class GrMockTextureRenderTarget : public GrMockTexture, public GrRenderTarget {
public:
    GrMockTextureRenderTarget(GrMockGpu* gpu, SkBudgeted budgeted, const GrSurfaceDesc& desc,
                              GrMipMapsStatus mipMapsStatus, const GrMockTextureInfo& texInfo)
            : GrSurface(gpu, desc)
            , GrMockTexture(gpu, desc, mipMapsStatus, texInfo)
            , GrRenderTarget(gpu, desc) {
        this->registerWithCache(budgeted);
    }
    ResolveType getResolveType() const override { return kCanResolve_ResolveType; }
    GrBackendObject getRenderTargetHandle() const override { return 0; }

    GrBackendRenderTarget getBackendRenderTarget() const override {
        return GrBackendRenderTarget(); // invalid
    }

    bool canAttemptStencilAttachment() const override { return true; }
    bool completeStencilAttachment() override { return true; }
    GrTexture* asTexture() override { return this; }
    GrRenderTarget* asRenderTarget() override { return this; }
    const GrTexture* asTexture() const override { return this; }
    const GrRenderTarget* asRenderTarget() const override { return this; }

private:
    void onAbandon() override {
        GrRenderTarget::onAbandon();
        GrMockTexture::onAbandon();
    }

    void onRelease() override {
        GrRenderTarget::onRelease();
        GrMockTexture::onRelease();
    }

    size_t onGpuMemorySize() const override {
        int numColorSamples = this->numColorSamples();
        if (numColorSamples > 1) {
            // Add one to account for the resolve buffer.
            ++numColorSamples;
        }
        return GrSurface::ComputeSize(this->config(), this->width(), this->height(),
                                      numColorSamples,
                                      this->texturePriv().mipMapped());
    }

    void computeScratchKey(GrScratchKey* key) const override {
        GrTexturePriv::ComputeScratchKey(this->config(), this->width(), this->height(),
                                         true, this->numStencilSamples(),
                                         this->texturePriv().mipMapped(), key);
    }
};

#endif