C++ GrRenderTarget::config方法代码示例

static void check_rendertarget(skiatest::Reporter* reporter,
                               const GrCaps& caps,
                               GrResourceProvider* provider,
                               GrRenderTargetProxy* rtProxy,
                               int numSamples,
                               SkBackingFit fit,
                               int expectedMaxWindowRects) {
    REPORTER_ASSERT(reporter, rtProxy->maxWindowRectangles(caps) == expectedMaxWindowRects);
    REPORTER_ASSERT(reporter, rtProxy->numStencilSamples() == numSamples);

    GrSurfaceProxy::UniqueID idBefore = rtProxy->uniqueID();
    bool preinstantiated = rtProxy->isInstantiated();
    REPORTER_ASSERT(reporter, rtProxy->instantiate(provider));
    GrRenderTarget* rt = rtProxy->peekRenderTarget();

    REPORTER_ASSERT(reporter, rtProxy->uniqueID() == idBefore);
    // Deferred resources should always have a different ID from their instantiated rendertarget
    if (preinstantiated) {
        REPORTER_ASSERT(reporter, rtProxy->uniqueID().asUInt() == rt->uniqueID().asUInt());
    } else {
        REPORTER_ASSERT(reporter, rtProxy->uniqueID().asUInt() != rt->uniqueID().asUInt());
    }

    if (SkBackingFit::kExact == fit) {
        REPORTER_ASSERT(reporter, rt->width() == rtProxy->width());
        REPORTER_ASSERT(reporter, rt->height() == rtProxy->height());
    } else {
        REPORTER_ASSERT(reporter, rt->width() >= rtProxy->width());
        REPORTER_ASSERT(reporter, rt->height() >= rtProxy->height());
    }
    REPORTER_ASSERT(reporter, rt->config() == rtProxy->config());

    REPORTER_ASSERT(reporter, rt->fsaaType() == rtProxy->fsaaType());
    REPORTER_ASSERT(reporter, rt->numColorSamples() == rtProxy->numColorSamples());
    REPORTER_ASSERT(reporter, rt->numStencilSamples() == rtProxy->numStencilSamples());
    REPORTER_ASSERT(reporter, rt->surfacePriv().flags() == rtProxy->testingOnly_getFlags());
}

bool GrVkProgramDescBuilder::Build(GrProgramDesc* desc,
                                   const GrPrimitiveProcessor& primProc,
                                   const GrPipeline& pipeline,
                                   const GrGLSLCaps& glslCaps) {
    // The descriptor is used as a cache key. Thus when a field of the
    // descriptor will not affect program generation (because of the attribute
    // bindings in use or other descriptor field settings) it should be set
    // to a canonical value to avoid duplicate programs with different keys.

    GrVkProgramDesc* vkDesc = (GrVkProgramDesc*)desc;

    GR_STATIC_ASSERT(0 == kProcessorKeysOffset % sizeof(uint32_t));
    // Make room for everything up to the effect keys.
    vkDesc->key().reset();
    vkDesc->key().push_back_n(kProcessorKeysOffset);

    GrProcessorKeyBuilder b(&vkDesc->key());

    primProc.getGLSLProcessorKey(glslCaps, &b);
    if (!gen_meta_key(primProc, glslCaps, 0, &b)) {
        vkDesc->key().reset();
        return false;
    }
    GrProcessor::RequiredFeatures requiredFeatures = primProc.requiredFeatures();

    for (int i = 0; i < pipeline.numFragmentProcessors(); ++i) {
        const GrFragmentProcessor& fp = pipeline.getFragmentProcessor(i);
        if (!gen_frag_proc_and_meta_keys(primProc, fp, glslCaps, &b)) {
            vkDesc->key().reset();
            return false;
        }
        requiredFeatures |= fp.requiredFeatures();
    }

    const GrXferProcessor& xp = pipeline.getXferProcessor();
    xp.getGLSLProcessorKey(glslCaps, &b);
    if (!gen_meta_key(xp, glslCaps, 0, &b)) {
        vkDesc->key().reset();
        return false;
    }
    requiredFeatures |= xp.requiredFeatures();

    // --------DO NOT MOVE HEADER ABOVE THIS LINE--------------------------------------------------
    // Because header is a pointer into the dynamic array, we can't push any new data into the key
    // below here.
    KeyHeader* header = vkDesc->atOffset<KeyHeader, kHeaderOffset>();

    // make sure any padding in the header is zeroed.
    memset(header, 0, kHeaderSize);

    GrRenderTarget* rt = pipeline.getRenderTarget();

    if (requiredFeatures & (GrProcessor::kFragmentPosition_RequiredFeature |
                            GrProcessor::kSampleLocations_RequiredFeature)) {
        header->fSurfaceOriginKey = GrGLSLFragmentShaderBuilder::KeyForSurfaceOrigin(rt->origin());
    } else {
        header->fSurfaceOriginKey = 0;
    }

    if (requiredFeatures & GrProcessor::kSampleLocations_RequiredFeature) {
        SkASSERT(pipeline.isHWAntialiasState());
        header->fSamplePatternKey =
            rt->renderTargetPriv().getMultisampleSpecs(pipeline.getStencil()).fUniqueID;
    } else {
        header->fSamplePatternKey = 0;
    }

    header->fOutputSwizzle = glslCaps.configOutputSwizzle(rt->config()).asKey();

    if (pipeline.ignoresCoverage()) {
        header->fIgnoresCoverage = 1;
    } else {
        header->fIgnoresCoverage = 0;
    }

    header->fSnapVerticesToPixelCenters = pipeline.snapVerticesToPixelCenters();
    header->fColorEffectCnt = pipeline.numColorFragmentProcessors();
    header->fCoverageEffectCnt = pipeline.numCoverageFragmentProcessors();
    vkDesc->finalize();
    return true;
}

bool GrDrawTarget::setupDstReadIfNecessary(const GrPipelineBuilder& pipelineBuilder,
                                           const GrPipelineOptimizations& optimizations,
                                           GrXferProcessor::DstTexture* dstTexture,
                                           const SkRect& batchBounds) {
    SkRect bounds = batchBounds;
    bounds.outset(0.5f, 0.5f);

    if (!pipelineBuilder.willXPNeedDstTexture(*this->caps(), optimizations)) {
        return true;
    }

    GrRenderTarget* rt = pipelineBuilder.getRenderTarget();

    if (this->caps()->textureBarrierSupport()) {
        if (GrTexture* rtTex = rt->asTexture()) {
            // The render target is a texture, so we can read from it directly in the shader. The XP
            // will be responsible to detect this situation and request a texture barrier.
            dstTexture->setTexture(rtTex);
            dstTexture->setOffset(0, 0);
            return true;
        }
    }

    SkIRect copyRect;
    pipelineBuilder.clip().getConservativeBounds(rt->width(), rt->height(), &copyRect);

    SkIRect drawIBounds;
    bounds.roundOut(&drawIBounds);
    if (!copyRect.intersect(drawIBounds)) {
#ifdef SK_DEBUG
        GrCapsDebugf(this->caps(), "Missed an early reject. "
                                   "Bailing on draw from setupDstReadIfNecessary.\n");
#endif
        return false;
    }

    // MSAA consideration: When there is support for reading MSAA samples in the shader we could
    // have per-sample dst values by making the copy multisampled.
    GrSurfaceDesc desc;
    if (!fGpu->initCopySurfaceDstDesc(rt, &desc)) {
        desc.fOrigin = kDefault_GrSurfaceOrigin;
        desc.fFlags = kRenderTarget_GrSurfaceFlag;
        desc.fConfig = rt->config();
    }

    desc.fWidth = copyRect.width();
    desc.fHeight = copyRect.height();

    static const uint32_t kFlags = 0;
    SkAutoTUnref<GrTexture> copy(fResourceProvider->createApproxTexture(desc, kFlags));

    if (!copy) {
        SkDebugf("Failed to create temporary copy of destination texture.\n");
        return false;
    }
    SkIPoint dstPoint = {0, 0};
    this->copySurface(copy, rt, copyRect, dstPoint);
    dstTexture->setTexture(copy);
    dstTexture->setOffset(copyRect.fLeft, copyRect.fTop);
    return true;
}