C++ GrTexture::unref方法代码示例

// This tests that GrTextureStripAtlas flushes pending IO on the texture it acquires.
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(GrTextureStripAtlasFlush, reporter, ctxInfo) {
    GrContext* context = ctxInfo.grContext();
    GrSurfaceDesc desc;
    desc.fWidth = 32;
    desc.fHeight = 32;
    desc.fConfig = kRGBA_8888_GrPixelConfig;
    GrTexture* texture = context->textureProvider()->createTexture(desc, SkBudgeted::kYes,
                                                                   nullptr, 0);

    GrSurfaceDesc targetDesc = desc;
    targetDesc.fFlags = kRenderTarget_GrSurfaceFlag;
    GrTexture* target = context->textureProvider()->createTexture(targetDesc, SkBudgeted::kYes,
                                                                  nullptr, 0);

    SkAutoTMalloc<uint32_t> pixels(desc.fWidth * desc.fHeight);
    memset(pixels.get(), 0xFF, sizeof(uint32_t) * desc.fWidth * desc.fHeight);
    texture->writePixels(0, 0, desc.fWidth, desc.fHeight, kRGBA_8888_GrPixelConfig, pixels.get());

    // Add a pending read to the texture, and then make it available for reuse.
    context->copySurface(target, texture);
    texture->unref();

    // Create an atlas with parameters that allow it to reuse the texture.
    GrTextureStripAtlas::Desc atlasDesc;
    atlasDesc.fContext = context;
    atlasDesc.fConfig = desc.fConfig;
    atlasDesc.fWidth = desc.fWidth;
    atlasDesc.fHeight = desc.fHeight;
    atlasDesc.fRowHeight = 1;
    GrTextureStripAtlas* atlas = GrTextureStripAtlas::GetAtlas(atlasDesc);

    // Write to the atlas' texture.
    SkImageInfo info = SkImageInfo::MakeN32(desc.fWidth, desc.fHeight, kPremul_SkAlphaType);
    size_t rowBytes = desc.fWidth * GrBytesPerPixel(desc.fConfig);
    SkBitmap bitmap;
    bitmap.allocPixels(info, rowBytes);
    memset(bitmap.getPixels(), 1, rowBytes * desc.fHeight);
    int row = atlas->lockRow(bitmap);
    if (!context->caps()->preferVRAMUseOverFlushes())
        REPORTER_ASSERT(reporter, texture == atlas->getTexture());

    // The atlas' use of its texture shouldn't change which pixels got copied to the target.
    SkAutoTMalloc<uint32_t> actualPixels(desc.fWidth * desc.fHeight);
    bool success = target->readPixels(0, 0, desc.fWidth, desc.fHeight, kRGBA_8888_GrPixelConfig,
                                      actualPixels.get());
    REPORTER_ASSERT(reporter, success);
    REPORTER_ASSERT(reporter,
                    !memcmp(pixels.get(), actualPixels.get(),
                            sizeof(uint32_t) * desc.fWidth * desc.fHeight));
    target->unref();
    atlas->unlockRow(row);
}

void wrap_tex_test(skiatest::Reporter* reporter, GrContext* context) {

    GrVkGpu* gpu = static_cast<GrVkGpu*>(context->getGpu());

    GrBackendObject backendObj = gpu->createTestingOnlyBackendTexture(nullptr, kW, kH, kPixelConfig,
                                                                      false);
    const GrVkImageInfo* backendTex = reinterpret_cast<const GrVkImageInfo*>(backendObj);

    // check basic borrowed creation
    GrBackendTextureDesc desc;
    desc.fConfig = kPixelConfig;
    desc.fWidth = kW;
    desc.fHeight = kH;
    desc.fTextureHandle = backendObj;
    GrTexture* tex = gpu->wrapBackendTexture(desc, kBorrow_GrWrapOwnership);
    REPORTER_ASSERT(reporter, tex);
    tex->unref();

    // image is null
    GrVkImageInfo backendCopy = *backendTex;
    backendCopy.fImage = VK_NULL_HANDLE;
    desc.fTextureHandle = (GrBackendObject) &backendCopy;
    tex = gpu->wrapBackendTexture(desc, kBorrow_GrWrapOwnership);
    REPORTER_ASSERT(reporter, !tex);
    tex = gpu->wrapBackendTexture(desc, kAdopt_GrWrapOwnership);
    REPORTER_ASSERT(reporter, !tex);

    // alloc is null
    backendCopy.fImage = backendTex->fImage;
    backendCopy.fAlloc = { VK_NULL_HANDLE, 0, 0 };
    tex = gpu->wrapBackendTexture(desc, kBorrow_GrWrapOwnership);
    REPORTER_ASSERT(reporter, !tex);
    tex = gpu->wrapBackendTexture(desc, kAdopt_GrWrapOwnership);
    REPORTER_ASSERT(reporter, !tex);

    // check adopt creation
    backendCopy.fAlloc = backendTex->fAlloc;
    tex = gpu->wrapBackendTexture(desc, kAdopt_GrWrapOwnership);
    REPORTER_ASSERT(reporter, tex);
    tex->unref();

    gpu->deleteTestingOnlyBackendTexture(backendObj, true);
}

GrTexture* GrGpu::createPlatformTexture(const GrPlatformTextureDesc& desc) {
    this->handleDirtyContext();
    GrTexture* tex = this->onCreatePlatformTexture(desc);
    // TODO: defer this and attach dynamically
    GrRenderTarget* tgt = tex->asRenderTarget();
    if (NULL != tgt &&
        !this->attachStencilBufferToRenderTarget(tgt)) {
        tex->unref();
        return NULL;
    } else {
        return tex;
    }
}

GrTexture* GrGpu::wrapBackendTexture(const GrBackendTextureDesc& desc, GrWrapOwnership ownership) {
    this->handleDirtyContext();
    GrTexture* tex = this->onWrapBackendTexture(desc, ownership);
    if (NULL == tex) {
        return NULL;
    }
    // TODO: defer this and attach dynamically
    GrRenderTarget* tgt = tex->asRenderTarget();
    if (tgt && !this->attachStencilAttachmentToRenderTarget(tgt)) {
        tex->unref();
        return NULL;
    } else {
        return tex;
    }
}

GrTexture* GrGpu::createTexture(const GrTextureDesc& desc,
                                const void* srcData, size_t rowBytes) {
    this->handleDirtyContext();
    GrTexture* tex = this->onCreateTexture(desc, srcData, rowBytes);
    if (NULL != tex && 
        (kRenderTarget_GrTextureFlagBit & desc.fFlags) &&
        !(kNoStencil_GrTextureFlagBit & desc.fFlags)) {
        GrAssert(NULL != tex->asRenderTarget());
        // TODO: defer this and attach dynamically
        if (!this->attachStencilBufferToRenderTarget(tex->asRenderTarget())) {
            tex->unref();
            return NULL;
        }
    }
    return tex;
}

GrTexture* GrGpu::wrapBackendTexture(const GrBackendTextureDesc& desc, GrWrapOwnership ownership) {
    this->handleDirtyContext();
    if (!this->caps()->isConfigTexturable(desc.fConfig)) {
        return nullptr;
    }
    if ((desc.fFlags & kRenderTarget_GrBackendTextureFlag) &&
        !this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
        return nullptr;
    }
    GrTexture* tex = this->onWrapBackendTexture(desc, ownership);
    if (nullptr == tex) {
        return nullptr;
    }
    // TODO: defer this and attach dynamically
    GrRenderTarget* tgt = tex->asRenderTarget();
    if (tgt && !fContext->resourceProvider()->attachStencilAttachment(tgt)) {
        tex->unref();
        return nullptr;
    } else {
        return tex;
    }
}

GrTexture* GrGpu::createTexture(const GrTextureDesc& desc,
                                const void* srcData, size_t rowBytes) {
    if (!this->caps()->isConfigTexturable(desc.fConfig)) {
        return NULL;
    }

    if ((desc.fFlags & kRenderTarget_GrTextureFlagBit) &&
        !this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
        return NULL;
    }

    GrTexture *tex = NULL;
    if (GrPixelConfigIsCompressed(desc.fConfig)) {
        // We shouldn't be rendering into this
        SkASSERT((desc.fFlags & kRenderTarget_GrTextureFlagBit) == 0);

        if (!this->caps()->npotTextureTileSupport() &&
            (!SkIsPow2(desc.fWidth) || !SkIsPow2(desc.fHeight))) {
            return NULL;
        }

        this->handleDirtyContext();
        tex = this->onCreateCompressedTexture(desc, srcData);
    } else {
        this->handleDirtyContext();
        tex = this->onCreateTexture(desc, srcData, rowBytes);
        if (tex &&
            (kRenderTarget_GrTextureFlagBit & desc.fFlags) &&
            !(kNoStencil_GrTextureFlagBit & desc.fFlags)) {
            SkASSERT(tex->asRenderTarget());
            // TODO: defer this and attach dynamically
            if (!this->attachStencilBufferToRenderTarget(tex->asRenderTarget())) {
                tex->unref();
                return NULL;
            }
        }
    }
    return tex;
}

GrTexture* GrGpu::createTexture(const GrTextureDesc& desc,
                                const void* srcData, size_t rowBytes) {
    if (kUnknown_GrPixelConfig == desc.fConfig) {
        return NULL;
    }
    if ((desc.fFlags & kRenderTarget_GrTextureFlagBit) &&
        !this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
        return NULL;
    }

    this->handleDirtyContext();
    GrTexture* tex = this->onCreateTexture(desc, srcData, rowBytes);
    if (NULL != tex &&
        (kRenderTarget_GrTextureFlagBit & desc.fFlags) &&
        !(kNoStencil_GrTextureFlagBit & desc.fFlags)) {
        SkASSERT(NULL != tex->asRenderTarget());
        // TODO: defer this and attach dynamically
        if (!this->attachStencilBufferToRenderTarget(tex->asRenderTarget())) {
            tex->unref();
            return NULL;
        }
    }
    return tex;
}