C++ GrVkRenderTarget::simpleRenderPass方法代码示例

void GrVkPipelineState::BuildStateKey(const GrPipeline& pipeline, GrPrimitiveType primitiveType,
                                      SkTArray<uint8_t, true>* key) {
    // Save room for the key length and key header
    key->reset();
    key->push_back_n(kData_StateKeyOffset);

    GrProcessorKeyBuilder b(key);

    GrVkRenderTarget* vkRT = (GrVkRenderTarget*)pipeline.getRenderTarget();
    vkRT->simpleRenderPass()->genKey(&b);

    pipeline.getStencil().genKey(&b);

    SkASSERT(sizeof(GrPipelineBuilder::DrawFace) <= sizeof(uint32_t));
    b.add32(pipeline.getDrawFace());

    b.add32(get_blend_info_key(pipeline));

    b.add32(primitiveType);

    // Set key length
    int keyLength = key->count();
    SkASSERT(0 == (keyLength % 4));
    *reinterpret_cast<uint32_t*>(key->begin()) = SkToU32(keyLength);
}

void GrVkGpuCommandBuffer::onDraw(const GrPipeline& pipeline,
                                  const GrPrimitiveProcessor& primProc,
                                  const GrMesh* meshes,
                                  int meshCount) {
    if (!meshCount) {
        return;
    }
    GrRenderTarget* rt = pipeline.getRenderTarget();
    GrVkRenderTarget* vkRT = static_cast<GrVkRenderTarget*>(rt);
    const GrVkRenderPass* renderPass = vkRT->simpleRenderPass();
    SkASSERT(renderPass);

    prepare_sampled_images(primProc, fGpu);
    GrFragmentProcessor::Iter iter(pipeline);
    while (const GrFragmentProcessor* fp = iter.next()) {
        prepare_sampled_images(*fp, fGpu);
    }
    prepare_sampled_images(pipeline.getXferProcessor(), fGpu);

    GrPrimitiveType primitiveType = meshes[0].primitiveType();
    sk_sp<GrVkPipelineState> pipelineState = this->prepareDrawState(pipeline,
                                                                    primProc,
                                                                    primitiveType,
                                                                    *renderPass);
    if (!pipelineState) {
        return;
    }

    for (int i = 0; i < meshCount; ++i) {
        const GrMesh& mesh = meshes[i];
        GrMesh::Iterator iter;
        const GrNonInstancedMesh* nonIdxMesh = iter.init(mesh);
        do {
            if (nonIdxMesh->primitiveType() != primitiveType) {
                // Technically we don't have to call this here (since there is a safety check in
                // pipelineState:setData but this will allow for quicker freeing of resources if the
                // pipelineState sits in a cache for a while.
                pipelineState->freeTempResources(fGpu);
                SkDEBUGCODE(pipelineState = nullptr);
                primitiveType = nonIdxMesh->primitiveType();
                pipelineState = this->prepareDrawState(pipeline,
                                                       primProc,
                                                       primitiveType,
                                                       *renderPass);
                if (!pipelineState) {
                    return;
                }
            }
            SkASSERT(pipelineState);
            this->bindGeometry(primProc, *nonIdxMesh);

            if (nonIdxMesh->isIndexed()) {
                fCommandBuffer->drawIndexed(fGpu,
                                            nonIdxMesh->indexCount(),
                                            1,
                                            nonIdxMesh->startIndex(),
                                            nonIdxMesh->startVertex(),
                                            0);
            } else {
                fCommandBuffer->draw(fGpu,
                                     nonIdxMesh->vertexCount(),
                                     1,
                                     nonIdxMesh->startVertex(),
                                     0);
            }
            fIsEmpty = false;

            fGpu->stats()->incNumDraws();
        } while ((nonIdxMesh = iter.next()));
    }

    // Technically we don't have to call this here (since there is a safety check in
    // pipelineState:setData but this will allow for quicker freeing of resources if the
    // pipelineState sits in a cache for a while.
    pipelineState->freeTempResources(fGpu);
}

//.........这里部分代码省略.........

    GrStencilAttachment* stencil = rt->renderTargetPriv().getStencilAttachment();
    if (stencil) {
        GrVkStencilAttachment* vkStencil = (GrVkStencilAttachment*)stencil;
        // We aren't actually using the stencil but we still load and store it so we need
        // appropriate barriers.
        // TODO: Once we refactor surface and how we conntect stencil to RTs, we should not even
        // have the stencil on this render pass if possible.
        vkStencil->setImageLayout(gpu,
                                  VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
                                  VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT |
                                  VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT,
                                  VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT,
                                  false);
    }

    VkAttachmentLoadOp loadOp = canDiscardOutsideDstRect ? VK_ATTACHMENT_LOAD_OP_DONT_CARE
                                                         : VK_ATTACHMENT_LOAD_OP_LOAD;
    GrVkRenderPass::LoadStoreOps vkColorOps(loadOp, VK_ATTACHMENT_STORE_OP_STORE);
    GrVkRenderPass::LoadStoreOps vkStencilOps(VK_ATTACHMENT_LOAD_OP_LOAD,
                                              VK_ATTACHMENT_STORE_OP_STORE);
    const GrVkRenderPass* renderPass;
    const GrVkResourceProvider::CompatibleRPHandle& rpHandle = rt->compatibleRenderPassHandle();
    if (rpHandle.isValid()) {
        renderPass = gpu->resourceProvider().findRenderPass(rpHandle,
                                                            vkColorOps,
                                                            vkStencilOps);
    } else {
        renderPass = gpu->resourceProvider().findRenderPass(*rt,
                                                            vkColorOps,
                                                            vkStencilOps);
    }

    SkASSERT(renderPass->isCompatible(*rt->simpleRenderPass()));

    GrVkPrimaryCommandBuffer* cmdBuffer = gpu->currentCommandBuffer();
    cmdBuffer->beginRenderPass(gpu, renderPass, nullptr, *rt, bounds, true);

    GrVkSecondaryCommandBuffer* secondary = gpu->cmdPool()->findOrCreateSecondaryCommandBuffer(gpu);
    if (!secondary) {
        return false;
    }
    secondary->begin(gpu, rt->framebuffer(), renderPass);

    secondary->bindPipeline(gpu, pipeline);

    // Uniform DescriptorSet, Sampler DescriptorSet, and vertex shader uniformBuffer
    SkSTArray<3, const GrVkRecycledResource*> descriptorRecycledResources;
    descriptorRecycledResources.push_back(uniformDS);
    descriptorRecycledResources.push_back(samplerDS);
    descriptorRecycledResources.push_back(fUniformBuffer->resource());

    // One sampler, texture view, and texture
    SkSTArray<3, const GrVkResource*> descriptorResources;
    descriptorResources.push_back(sampler);
    descriptorResources.push_back(srcTex->textureView());
    descriptorResources.push_back(srcTex->resource());

    secondary->bindDescriptorSets(gpu,
                                  descriptorRecycledResources,
                                  descriptorResources,
                                  fPipelineLayout,
                                  0,
                                  2,
                                  vkDescSets,
                                  0,