C++ GrRenderTarget类代码示例

SkImage* SkSurface_Gpu::onNewImageSnapshot(SkBudgeted budgeted, ForceCopyMode forceCopyMode) {
    GrRenderTarget* rt = fDevice->accessRenderTarget();
    SkASSERT(rt);
    GrTexture* tex = rt->asTexture();
    SkAutoTUnref<GrTexture> copy;
    // TODO: Force a copy when the rt is an external resource.
    if (kYes_ForceCopyMode == forceCopyMode || !tex) {
        GrSurfaceDesc desc = fDevice->accessRenderTarget()->desc();
        GrContext* ctx = fDevice->context();
        desc.fFlags = desc.fFlags & ~kRenderTarget_GrSurfaceFlag;
        copy.reset(ctx->textureProvider()->createTexture(desc, budgeted));
        if (!copy) {
            return nullptr;
        }
        if (!ctx->copySurface(copy, rt)) {
            return nullptr;
        }
        tex = copy;
    }
    const SkImageInfo info = fDevice->imageInfo();
    SkImage* image = nullptr;
    if (tex) {
        image = new SkImage_Gpu(info.width(), info.height(), kNeedNewImageUniqueID,
                                info.alphaType(), tex, budgeted);
    }
    return image;
}

bool GrClipMaskManager::setupScissorClip(const GrPipelineBuilder& pipelineBuilder,
                                         GrPipelineBuilder::AutoRestoreStencil* ars,
                                         const SkIRect& clipScissor,
                                         const SkRect* devBounds,
                                         GrAppliedClip* out) {
    if (kRespectClip_StencilClipMode == fClipMode) {
        fClipMode = kIgnoreClip_StencilClipMode;
    }

    GrRenderTarget* rt = pipelineBuilder.getRenderTarget();

    SkIRect clipSpaceRTIBounds = SkIRect::MakeWH(rt->width(), rt->height());
    SkIRect devBoundsScissor;
    const SkIRect* scissor = &clipScissor;
    bool doDevBoundsClip = fDebugClipBatchToBounds && devBounds;
    if (doDevBoundsClip) {
        devBounds->roundOut(&devBoundsScissor);
        if (devBoundsScissor.intersect(clipScissor)) {
            scissor = &devBoundsScissor;
        }
    }

    if (scissor->contains(clipSpaceRTIBounds)) {
        // This counts as wide open
        this->setPipelineBuilderStencil(pipelineBuilder, ars);
        return true;
    }

    if (clipSpaceRTIBounds.intersect(*scissor)) {
        out->fScissorState.set(clipSpaceRTIBounds);
        this->setPipelineBuilderStencil(pipelineBuilder, ars);
        return true;
    }
    return false;
}

void GrGLProgram::setRenderTargetState(const GrPrimitiveProcessor& primProc,
                                       const GrRenderTargetProxy* proxy) {
    GrRenderTarget* rt = proxy->priv().peekRenderTarget();
    // Load the RT height uniform if it is needed to y-flip gl_FragCoord.
    if (fBuiltinUniformHandles.fRTHeightUni.isValid() &&
        fRenderTargetState.fRenderTargetSize.fHeight != rt->height()) {
        fProgramDataManager.set1f(fBuiltinUniformHandles.fRTHeightUni, SkIntToScalar(rt->height()));
    }

    // set RT adjustment
    SkISize size;
    size.set(rt->width(), rt->height());
    if (!primProc.isPathRendering()) {
        if (fRenderTargetState.fRenderTargetOrigin != proxy->origin() ||
            fRenderTargetState.fRenderTargetSize != size) {
            fRenderTargetState.fRenderTargetSize = size;
            fRenderTargetState.fRenderTargetOrigin = proxy->origin();

            float rtAdjustmentVec[4];
            fRenderTargetState.getRTAdjustmentVec(rtAdjustmentVec);
            fProgramDataManager.set4fv(fBuiltinUniformHandles.fRTAdjustmentUni, 1, rtAdjustmentVec);
        }
    } else {
        SkASSERT(fGpu->glCaps().shaderCaps()->pathRenderingSupport());
        const GrPathProcessor& pathProc = primProc.cast<GrPathProcessor>();
        fGpu->glPathRendering()->setProjectionMatrix(pathProc.viewMatrix(),
                                                     size, proxy->origin());
    }
}

void GrDrawTarget::stencilPath(GrPipelineBuilder* pipelineBuilder,
                               const GrPathProcessor* pathProc,
                               const GrPath* path,
                               GrPathRendering::FillType fill) {
    // TODO: extract portions of checkDraw that are relevant to path stenciling.
    SkASSERT(path);
    SkASSERT(this->caps()->shaderCaps()->pathRenderingSupport());
    SkASSERT(pipelineBuilder);

    // Setup clip
    GrScissorState scissorState;
    GrPipelineBuilder::AutoRestoreFragmentProcessors arfp;
    GrPipelineBuilder::AutoRestoreStencil ars;
    if (!this->setupClip(pipelineBuilder, &arfp, &ars, &scissorState, NULL)) {
        return;
    }

    // set stencil settings for path
    GrStencilSettings stencilSettings;
    GrRenderTarget* rt = pipelineBuilder->getRenderTarget();
    GrStencilAttachment* sb = rt->renderTargetPriv().attachStencilAttachment();
    this->getPathStencilSettingsForFilltype(fill, sb, &stencilSettings);

    this->onStencilPath(*pipelineBuilder, pathProc, path, scissorState, stencilSettings);
}

sk_sp<SkImage> SkSurface_Gpu::onNewImageSnapshot(SkBudgeted budgeted, ForceCopyMode forceCopyMode) {
    GrRenderTarget* rt = fDevice->accessDrawContext()->accessRenderTarget();
    SkASSERT(rt);
    GrTexture* tex = rt->asTexture();
    SkAutoTUnref<GrTexture> copy;
    // If the original render target is a buffer originally created by the client, then we don't
    // want to ever retarget the SkSurface at another buffer we create. Force a copy now to avoid
    // copy-on-write.
    if (kYes_ForceCopyMode == forceCopyMode || !tex || rt->resourcePriv().refsWrappedObjects()) {
        GrSurfaceDesc desc = fDevice->accessDrawContext()->desc();
        GrContext* ctx = fDevice->context();
        desc.fFlags = desc.fFlags & ~kRenderTarget_GrSurfaceFlag;
        copy.reset(ctx->textureProvider()->createTexture(desc, budgeted));
        if (!copy) {
            return nullptr;
        }
        if (!ctx->copySurface(copy, rt)) {
            return nullptr;
        }
        tex = copy;
    }
    const SkImageInfo info = fDevice->imageInfo();
    sk_sp<SkImage> image;
    if (tex) {
        image = sk_make_sp<SkImage_Gpu>(info.width(), info.height(), kNeedNewImageUniqueID,
                                        info.alphaType(), tex, sk_ref_sp(info.colorSpace()),
                                        budgeted);
    }
    return image;
}

void GrDrawTarget::drawPath(const GrPipelineBuilder& pipelineBuilder,
                            const GrPathProcessor* pathProc,
                            const GrPath* path,
                            GrPathRendering::FillType fill) {
    // TODO: extract portions of checkDraw that are relevant to path rendering.
    SkASSERT(path);
    SkASSERT(this->caps()->shaderCaps()->pathRenderingSupport());

    SkRect devBounds = path->getBounds();
    pathProc->viewMatrix().mapRect(&devBounds);

    // Setup clip
    GrScissorState scissorState;
    GrPipelineBuilder::AutoRestoreFragmentProcessorState arfps;
    GrPipelineBuilder::AutoRestoreStencil ars;
    if (!this->setupClip(pipelineBuilder, &arfps, &ars, &scissorState, &devBounds)) {
       return;
    }

    // set stencil settings for path
    GrStencilSettings stencilSettings;
    GrRenderTarget* rt = pipelineBuilder.getRenderTarget();
    GrStencilAttachment* sb = rt->renderTargetPriv().attachStencilAttachment();
    this->getPathStencilSettingsForFilltype(fill, sb, &stencilSettings);

    GrDrawTarget::PipelineInfo pipelineInfo(pipelineBuilder, &scissorState, pathProc, &devBounds,
                                            this);
    if (pipelineInfo.mustSkipDraw()) {
        return;
    }

    this->onDrawPath(pathProc, path, stencilSettings, pipelineInfo);
}

SkData* Request::getJsonBatchList(int n) {
    SkCanvas* canvas = this->getCanvas();
    SkASSERT(fGPUEnabled);

    // TODO if this is inefficient we could add a method to GrAuditTrail which takes
    // a Json::Value and is only compiled in this file
    Json::Value parsedFromString;
#if SK_SUPPORT_GPU
    GrRenderTarget* rt = canvas->internal_private_accessTopLayerRenderTarget();
    SkASSERT(rt);
    GrContext* ctx = rt->getContext();
    SkASSERT(ctx);
    GrAuditTrail* at = ctx->getAuditTrail();
    GrAuditTrail::AutoManageBatchList enable(at);
    
    fDebugCanvas->drawTo(canvas, n);

    Json::Reader reader;
    SkDEBUGCODE(bool parsingSuccessful = )reader.parse(at->toJson(true).c_str(),
                                                       parsedFromString);
    SkASSERT(parsingSuccessful);
#endif

    SkDynamicMemoryWStream stream;
    stream.writeText(Json::FastWriter().write(parsedFromString).c_str());

    return stream.copyToData();
}

Canvas2DLayerBridge::Canvas2DLayerBridge(PassRefPtr<GraphicsContext3D> context, SkDeferredCanvas* canvas, OpacityMode opacityMode, ThreadMode threadMode)
    : m_canvas(canvas)
    , m_context(context)
    , m_bytesAllocated(0)
    , m_didRecordDrawCommand(false)
    , m_framesPending(0)
    , m_next(0)
    , m_prev(0)
#if ENABLE(CANVAS_USES_MAILBOX)
    , m_lastImageId(0)
#endif
{
    ASSERT(m_canvas);
    // Used by browser tests to detect the use of a Canvas2DLayerBridge.
    TRACE_EVENT_INSTANT0("test_gpu", "Canvas2DLayerBridgeCreation");
    m_canvas->setNotificationClient(this);
#if ENABLE(CANVAS_USES_MAILBOX)
    m_layer = adoptPtr(WebKit::Platform::current()->compositorSupport()->createExternalTextureLayerForMailbox(this));
#else
    m_layer = adoptPtr(WebKit::Platform::current()->compositorSupport()->createExternalTextureLayer(this));
    m_layer->setRateLimitContext(threadMode == SingleThread);
    GrRenderTarget* renderTarget = reinterpret_cast<GrRenderTarget*>(m_canvas->getDevice()->accessRenderTarget());
    if (renderTarget) {
        m_layer->setTextureId(renderTarget->asTexture()->getTextureHandle());
    }
#endif
    m_layer->setOpaque(opacityMode == Opaque);
    GraphicsLayerChromium::registerContentsLayer(m_layer->layer());
}

bool SkSurface_Gpu::onGetRenderTargetHandle(GrBackendObject* obj, BackendHandleAccess access) {
    GrRenderTarget* rt = prepare_rt_for_external_access(this, access);
    if (!rt) {
        return false;
    }
    *obj = rt->getRenderTargetHandle();
    return true;
}

Platform3DObject AcceleratedImageBufferSurface::getBackingTexture() const
{
    GrRenderTarget* renderTarget = m_canvas->getTopDevice()->accessRenderTarget();
    if (renderTarget) {
        return renderTarget->asTexture()->getTextureHandle();
    }
    return 0;
}

SkSurface* SkSurface_Gpu::onNewSurface(const SkImageInfo& info) {
    GrRenderTarget* rt = fDevice->accessRenderTarget();
    int sampleCount = rt->numSamples();
    // TODO: Make caller specify this (change virtual signature of onNewSurface).
    static const Budgeted kBudgeted = kNo_Budgeted;
    return SkSurface::NewRenderTarget(fDevice->context(), kBudgeted, info, sampleCount,
                                      &this->props());
}

GrBackendObject SkSurface_Gpu::onGetTextureHandle(BackendHandleAccess access) {
    GrRenderTarget* rt = prepare_rt_for_external_access(this, access);
    GrTexture* texture = rt->asTexture();
    if (texture) {
        return texture->getTextureHandle();
    }
    return 0;
}

void set_dynamic_scissor_state(GrVkGpu* gpu,
                               GrVkCommandBuffer* cmdBuffer,
                               const GrPipeline& pipeline,
                               const GrRenderTarget& target) {
    // We always use one scissor and if it is disabled we just make it the size of the RT
    const GrScissorState& scissorState = pipeline.getScissorState();
    VkRect2D scissor;
    if (scissorState.enabled() &&
        !scissorState.rect().contains(0, 0, target.width(), target.height())) {
        // This all assumes the scissorState has previously been clipped to the device space render
        // target. 
        scissor.offset.x = scissorState.rect().fLeft;
        scissor.extent.width = scissorState.rect().width();
        if (kTopLeft_GrSurfaceOrigin == target.origin()) {
            scissor.offset.y = scissorState.rect().fTop;
        } else {
            SkASSERT(kBottomLeft_GrSurfaceOrigin == target.origin());
            scissor.offset.y = target.height() - scissorState.rect().fBottom;
        }
        scissor.extent.height = scissorState.rect().height();

        SkASSERT(scissor.offset.x >= 0);
        SkASSERT(scissor.offset.x + scissor.extent.width <= (uint32_t)target.width());
        SkASSERT(scissor.offset.y >= 0);
        SkASSERT(scissor.offset.y + scissor.extent.height <= (uint32_t)target.height());
    } else {
        scissor.extent.width = target.width();
        scissor.extent.height = target.height();
        scissor.offset.x = 0;
        scissor.offset.y = 0;
    }
    cmdBuffer->setScissor(gpu, 0, 1, &scissor);
}

unsigned Canvas2DLayerBridge::backBufferTexture()
{
    contextAcquired();
    m_canvas->flush();
    m_context->flush();
    GrRenderTarget* renderTarget = reinterpret_cast<GrRenderTarget*>(m_canvas->getDevice()->accessRenderTarget());
    if (renderTarget) {
        return renderTarget->asTexture()->getTextureHandle();
    }
    return 0;
}

bool GrAAHairLinePathRenderer::onDrawPath(const DrawPathArgs& args) {
    SkIRect devClipBounds;
    GrRenderTarget* rt = args.fPipelineBuilder->getRenderTarget();
    args.fPipelineBuilder->clip().getConservativeBounds(rt->width(), rt->height(), &devClipBounds);

    SkAutoTUnref<GrDrawBatch> batch(create_hairline_batch(args.fColor, *args.fViewMatrix, *args.fPath,
                                                          *args.fStroke, devClipBounds));
    args.fTarget->drawBatch(*args.fPipelineBuilder, batch);

    return true;
}