C++ GrContext::contextPriv方法代码示例

static int get_glprograms_max_stages(const sk_gpu_test::ContextInfo& ctxInfo) {
    GrContext* context = ctxInfo.grContext();
    GrGLGpu* gpu = static_cast<GrGLGpu*>(context->contextPriv().getGpu());
    int maxStages = 6;
    if (kGLES_GrGLStandard == gpu->glStandard()) {
    // We've had issues with driver crashes and HW limits being exceeded with many effects on
    // Android devices. We have passes on ARM devices with the default number of stages.
    // TODO When we run ES 3.00 GLSL in more places, test again
#ifdef SK_BUILD_FOR_ANDROID
        if (kARM_GrGLVendor != gpu->ctxInfo().vendor()) {
            maxStages = 1;
        }
#endif
    // On iOS we can exceed the maximum number of varyings. http://skbug.com/6627.
#ifdef SK_BUILD_FOR_IOS
        maxStages = 3;
#endif
    }
    if (ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D9_ES2_ContextType ||
        ctxInfo.type() == sk_gpu_test::GrContextFactory::kANGLE_D3D11_ES2_ContextType) {
        // On Angle D3D we will hit a limit of out variables if we use too many stages.
        maxStages = 3;
    }
    return maxStages;
}

    void onDraw(SkCanvas* canvas) override {
        GrRenderTargetContext* renderTargetContext =
            canvas->internal_private_accessTopLayerRenderTargetContext();
        if (!renderTargetContext) {
            skiagm::GM::DrawGpuOnlyMessage(canvas);
            return;
        }

        GrContext* context = canvas->getGrContext();
        if (!context) {
            return;
        }

        GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();
        sk_sp<GrTextureProxy> proxy[3];

        for (int i = 0; i < 3; ++i) {
            int index = (0 == i) ? 0 : 1;
            GrSurfaceDesc desc;
            desc.fWidth = fBmp[index].width();
            desc.fHeight = fBmp[index].height();
            desc.fConfig = SkImageInfo2GrPixelConfig(fBmp[index].info(), *context->caps());
            SkASSERT(kUnknown_GrPixelConfig != desc.fConfig);

            proxy[i] = proxyProvider->createTextureProxy(
                    desc, SkBudgeted::kYes, fBmp[index].getPixels(), fBmp[index].rowBytes());
            if (!proxy[i]) {
                return;
            }
        }

        constexpr SkScalar kDrawPad = 10.f;
        constexpr SkScalar kTestPad = 10.f;
        constexpr SkScalar kColorSpaceOffset = 36.f;
        SkISize sizes[3] = {{YSIZE, YSIZE}, {USIZE, USIZE}, {VSIZE, VSIZE}};

        for (int space = kJPEG_SkYUVColorSpace; space <= kLastEnum_SkYUVColorSpace; ++space) {
            SkRect renderRect =
                SkRect::MakeWH(SkIntToScalar(fBmp[0].width()), SkIntToScalar(fBmp[0].height()));
            renderRect.outset(kDrawPad, kDrawPad);

            SkScalar y = kDrawPad + kTestPad + space * kColorSpaceOffset;
            SkScalar x = kDrawPad + kTestPad;

            GrPaint grPaint;
            grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
            auto fp = GrYUVtoRGBEffect::Make(proxy[0], proxy[1], proxy[2], sizes,
                                             static_cast<SkYUVColorSpace>(space), true);
            if (fp) {
                SkMatrix viewMatrix;
                viewMatrix.setTranslate(x, y);
                grPaint.addColorFragmentProcessor(std::move(fp));
                std::unique_ptr<GrDrawOp> op(GrRectOpFactory::MakeNonAAFill(
                                std::move(grPaint), viewMatrix, renderRect, GrAAType::kNone));
                renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
            }
        }
    }

bool SkSurface_Gpu::onDraw(const SkDeferredDisplayList* ddl) {
    if (!ddl || !this->isCompatible(ddl->characterization())) {
        return false;
    }

    GrRenderTargetContext* rtc = fDevice->accessRenderTargetContext();
    GrContext* ctx = fDevice->context();

    ctx->contextPriv().copyOpListsFromDDL(ddl, rtc->asRenderTargetProxy());
    return true;
}

void GrRenderTarget::discard() {
    // go through context so that all necessary flushing occurs
    GrContext* context = this->getContext();
    if (!context) {
        return;
    }

    sk_sp<GrDrawContext> drawContext(context->contextPriv().makeWrappedDrawContext(sk_ref_sp(this),
                                                                                   nullptr));
    if (!drawContext) {
        return;
    }

    drawContext->discard();
}

DEF_GPUTEST_FOR_ALL_CONTEXTS(TessellatingPathRendererTests, reporter, ctxInfo) {
    GrContext* ctx = ctxInfo.grContext();
    sk_sp<GrRenderTargetContext> rtc(ctx->contextPriv().makeDeferredRenderTargetContext(
            SkBackingFit::kApprox, 800, 800, kRGBA_8888_GrPixelConfig, nullptr, 1, GrMipMapped::kNo,
            kTopLeft_GrSurfaceOrigin));
    if (!rtc) {
        return;
    }

    ctx->flush();
    // Adding discard to appease vulkan validation warning about loading uninitialized data on draw
    rtc->discard();

    test_path(ctx, rtc.get(), create_path_0());
    test_path(ctx, rtc.get(), create_path_1());
    test_path(ctx, rtc.get(), create_path_2());
    test_path(ctx, rtc.get(), create_path_3());
    test_path(ctx, rtc.get(), create_path_4());
    test_path(ctx, rtc.get(), create_path_5());
    test_path(ctx, rtc.get(), create_path_6());
    test_path(ctx, rtc.get(), create_path_7());
    test_path(ctx, rtc.get(), create_path_8());
    test_path(ctx, rtc.get(), create_path_9());
    test_path(ctx, rtc.get(), create_path_10());
    test_path(ctx, rtc.get(), create_path_11());
    test_path(ctx, rtc.get(), create_path_12());
    test_path(ctx, rtc.get(), create_path_13());
    test_path(ctx, rtc.get(), create_path_14());
    test_path(ctx, rtc.get(), create_path_15());
    test_path(ctx, rtc.get(), create_path_16());
    SkMatrix nonInvertibleMatrix = SkMatrix::MakeScale(0, 0);
    std::unique_ptr<GrFragmentProcessor> fp(create_linear_gradient_processor(ctx));
    test_path(ctx, rtc.get(), create_path_17(), nonInvertibleMatrix, GrAAType::kCoverage,
              std::move(fp));
    test_path(ctx, rtc.get(), create_path_18());
    test_path(ctx, rtc.get(), create_path_19());
    test_path(ctx, rtc.get(), create_path_20(), SkMatrix(), GrAAType::kCoverage);
    test_path(ctx, rtc.get(), create_path_21(), SkMatrix(), GrAAType::kCoverage);
    test_path(ctx, rtc.get(), create_path_22());
    test_path(ctx, rtc.get(), create_path_23());
    test_path(ctx, rtc.get(), create_path_24());
    test_path(ctx, rtc.get(), create_path_25(), SkMatrix(), GrAAType::kCoverage);
    test_path(ctx, rtc.get(), create_path_26(), SkMatrix(), GrAAType::kCoverage);
    test_path(ctx, rtc.get(), create_path_27(), SkMatrix(), GrAAType::kCoverage);
    test_path(ctx, rtc.get(), create_path_28(), SkMatrix(), GrAAType::kCoverage);
    test_path(ctx, rtc.get(), create_path_29());
}

bool SkSurface_Gpu::onDraw(const SkDeferredDisplayList* ddl) {
    if (!ddl || !this->isCompatible(ddl->characterization())) {
        return false;
    }

#ifdef SK_RASTER_RECORDER_IMPLEMENTATION
    // Ultimately need to pass opLists from the DeferredDisplayList on to the
    // SkGpuDevice's renderTargetContext.
    return ddl->draw(this);
#else
    GrRenderTargetContext* rtc = fDevice->accessRenderTargetContext();
    GrContext* ctx = fDevice->context();

    ctx->contextPriv().copyOpListsFromDDL(ddl, rtc->asRenderTargetProxy());
    return true;
#endif
}

DEF_GPUTEST_FOR_RENDERING_CONTEXTS(EmptySurfaceSemaphoreTest, reporter, ctxInfo) {
    GrContext* ctx = ctxInfo.grContext();
    if (!ctx->caps()->fenceSyncSupport()) {
        return;
    }

    const SkImageInfo ii = SkImageInfo::Make(MAIN_W, MAIN_H, kRGBA_8888_SkColorType,
                                             kPremul_SkAlphaType);

    sk_sp<SkSurface> mainSurface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo,
                                                             ii, 0, kTopLeft_GrSurfaceOrigin,
                                                             nullptr));

    // Flush surface once without semaphores to make sure there is no peneding IO for it.
    mainSurface->flush();

    GrBackendSemaphore semaphore;
    GrSemaphoresSubmitted submitted = mainSurface->flushAndSignalSemaphores(1, &semaphore);
    REPORTER_ASSERT(reporter, GrSemaphoresSubmitted::kYes == submitted);

    if (kOpenGL_GrBackend == ctxInfo.backend()) {
        GrGLGpu* gpu = static_cast<GrGLGpu*>(ctx->contextPriv().getGpu());
        const GrGLInterface* interface = gpu->glInterface();
        GrGLsync sync = semaphore.glSync();
        REPORTER_ASSERT(reporter, sync);
        bool result;
        GR_GL_CALL_RET(interface, result, IsSync(sync));
        REPORTER_ASSERT(reporter, result);
    }

#ifdef SK_VULKAN
    if (kVulkan_GrBackend == ctxInfo.backend()) {
        GrVkGpu* gpu = static_cast<GrVkGpu*>(ctx->contextPriv().getGpu());
        const GrVkInterface* interface = gpu->vkInterface();
        VkDevice device = gpu->device();
        VkQueue queue = gpu->queue();
        VkCommandPool cmdPool = gpu->cmdPool();
        VkCommandBuffer cmdBuffer;

        // Create Command Buffer
        const VkCommandBufferAllocateInfo cmdInfo = {
            VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,   // sType
            nullptr,                                          // pNext
            cmdPool,                                          // commandPool
            VK_COMMAND_BUFFER_LEVEL_PRIMARY,                  // level
            1                                                 // bufferCount
        };

        VkResult err = GR_VK_CALL(interface, AllocateCommandBuffers(device, &cmdInfo, &cmdBuffer));
        if (err) {
            return;
        }

        VkCommandBufferBeginInfo cmdBufferBeginInfo;
        memset(&cmdBufferBeginInfo, 0, sizeof(VkCommandBufferBeginInfo));
        cmdBufferBeginInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
        cmdBufferBeginInfo.pNext = nullptr;
        cmdBufferBeginInfo.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
        cmdBufferBeginInfo.pInheritanceInfo = nullptr;

        GR_VK_CALL_ERRCHECK(interface, BeginCommandBuffer(cmdBuffer, &cmdBufferBeginInfo));
        GR_VK_CALL_ERRCHECK(interface, EndCommandBuffer(cmdBuffer));

        VkFenceCreateInfo fenceInfo;
        VkFence fence;

        memset(&fenceInfo, 0, sizeof(VkFenceCreateInfo));
        fenceInfo.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
        err = GR_VK_CALL(interface, CreateFence(device, &fenceInfo, nullptr, &fence));
        SkASSERT(!err);

        VkPipelineStageFlags waitStages = VK_PIPELINE_STAGE_ALL_COMMANDS_BIT;
        VkSubmitInfo submitInfo;
        memset(&submitInfo, 0, sizeof(VkSubmitInfo));
        submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
        submitInfo.pNext = nullptr;
        submitInfo.waitSemaphoreCount = 1;
        VkSemaphore vkSem = semaphore.vkSemaphore();
        submitInfo.pWaitSemaphores = &vkSem;
        submitInfo.pWaitDstStageMask = &waitStages;
        submitInfo.commandBufferCount = 1;
        submitInfo.pCommandBuffers = &cmdBuffer;
        submitInfo.signalSemaphoreCount = 0;
        submitInfo.pSignalSemaphores = nullptr;
        GR_VK_CALL_ERRCHECK(interface, QueueSubmit(queue, 1, &submitInfo, fence));

        err = GR_VK_CALL(interface, WaitForFences(device, 1, &fence, true, 3000000000));

        REPORTER_ASSERT(reporter, err != VK_TIMEOUT);

        GR_VK_CALL(interface, DestroyFence(device, fence, nullptr));
        GR_VK_CALL(interface, DestroySemaphore(device, vkSem, nullptr));
        // If the above test fails the wait semaphore will never be signaled which can cause the
        // device to hang when tearing down (even if just tearing down GL). So we Fail here to
        // kill things.
        if (err == VK_TIMEOUT) {
            SK_ABORT("Waiting on semaphore indefinitely");
        }
    }
#endif
//.........这里部分代码省略.........

void surface_semaphore_test(skiatest::Reporter* reporter,
                            const sk_gpu_test::ContextInfo& mainInfo,
                            const sk_gpu_test::ContextInfo& childInfo1,
                            const sk_gpu_test::ContextInfo& childInfo2,
                            bool flushContext) {
    GrContext* mainCtx = mainInfo.grContext();
    if (!mainCtx->caps()->fenceSyncSupport()) {
        return;
    }

    const SkImageInfo ii = SkImageInfo::Make(MAIN_W, MAIN_H, kRGBA_8888_SkColorType,
                                             kPremul_SkAlphaType);

    sk_sp<SkSurface> mainSurface(SkSurface::MakeRenderTarget(mainCtx, SkBudgeted::kNo,
                                                             ii, 0, kTopLeft_GrSurfaceOrigin,
                                                             nullptr));
    SkCanvas* mainCanvas = mainSurface->getCanvas();
    mainCanvas->clear(SK_ColorBLUE);

    SkAutoTArray<GrBackendSemaphore> semaphores(2);
#ifdef SK_VULKAN
    if (kVulkan_GrBackend == mainInfo.backend()) {
        // Initialize the secondary semaphore instead of having Ganesh create one internally
        GrVkGpu* gpu = static_cast<GrVkGpu*>(mainCtx->contextPriv().getGpu());
        const GrVkInterface* interface = gpu->vkInterface();
        VkDevice device = gpu->device();

        VkSemaphore vkSem;

        VkSemaphoreCreateInfo createInfo;
        createInfo.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
        createInfo.pNext = nullptr;
        createInfo.flags = 0;
        GR_VK_CALL_ERRCHECK(interface, CreateSemaphore(device, &createInfo, nullptr, &vkSem));

        semaphores[1].initVulkan(vkSem);
    }
#endif

    if (flushContext) {
        mainCtx->flushAndSignalSemaphores(2, semaphores.get());
    } else {
        mainSurface->flushAndSignalSemaphores(2, semaphores.get());
    }

    sk_sp<SkImage> mainImage = mainSurface->makeImageSnapshot();
    GrBackendTexture backendTexture = mainImage->getBackendTexture(false);

    draw_child(reporter, childInfo1, backendTexture, semaphores[0]);

#ifdef SK_VULKAN
    if (kVulkan_GrBackend == mainInfo.backend()) {
        // In Vulkan we need to make sure we are sending the correct VkImageLayout in with the
        // backendImage. After the first child draw the layout gets changed to SHADER_READ, so
        // we just manually set that here.
        GrVkImageInfo vkInfo;
        SkAssertResult(backendTexture.getVkImageInfo(&vkInfo));
        vkInfo.updateImageLayout(VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
    }
#endif

    draw_child(reporter, childInfo2, backendTexture, semaphores[1]);
}

DEF_GPUTEST_FOR_RENDERING_CONTEXTS(CopySurface, reporter, ctxInfo) {
    GrContext* context = ctxInfo.grContext();
    static const int kW = 10;
    static const int kH = 10;
    static const size_t kRowBytes = sizeof(uint32_t) * kW;

    SkAutoTMalloc<uint32_t> srcPixels(kW * kH);
    for (int i = 0; i < kW * kH; ++i) {
        srcPixels.get()[i] = i;
    }

    SkAutoTMalloc<uint32_t> dstPixels(kW * kH);
    for (int i = 0; i < kW * kH; ++i) {
        dstPixels.get()[i] = ~i;
    }

    static const SkIRect kSrcRects[] {
        { 0,  0, kW  , kH  },
        {-1, -1, kW+1, kH+1},
        { 1,  1, kW-1, kH-1},
        { 5,  5, 6   , 6   },
    };

    static const SkIPoint kDstPoints[] {
        { 0   ,  0   },
        { 1   ,  1   },
        { kW/2,  kH/4},
        { kW-1,  kH-1},
        { kW  ,  kH  },
        { kW+1,  kH+2},
        {-1   , -1   },
    };

    const SkImageInfo ii = SkImageInfo::Make(kW, kH, kRGBA_8888_SkColorType, kPremul_SkAlphaType);

    SkAutoTMalloc<uint32_t> read(kW * kH);

    for (auto sOrigin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) {
        for (auto dOrigin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) {
            for (auto sRT : {true, false}) {
                for (auto dRT : {true, false}) {
                    for (auto srcRect : kSrcRects) {
                        for (auto dstPoint : kDstPoints) {
                            auto src = sk_gpu_test::MakeTextureProxyFromData(
                                    context, sRT, kW, kH, ii.colorType(), sOrigin, srcPixels.get(),
                                    kRowBytes);
                            auto dst = sk_gpu_test::MakeTextureProxyFromData(
                                    context, dRT, kW, kH, ii.colorType(), dOrigin, dstPixels.get(),
                                    kRowBytes);
                            if (!src || !dst) {
                                ERRORF(reporter,
                                       "Could not create surfaces for copy surface test.");
                                continue;
                            }

                            sk_sp<GrSurfaceContext> dstContext =
                                   context->contextPriv().makeWrappedSurfaceContext(std::move(dst));

                            bool result = dstContext->copy(src.get(), srcRect, dstPoint);

                            bool expectedResult = true;
                            SkIPoint dstOffset = { dstPoint.fX - srcRect.fLeft,
                                                   dstPoint.fY - srcRect.fTop };
                            SkIRect copiedDstRect = SkIRect::MakeXYWH(dstPoint.fX,
                                                                      dstPoint.fY,
                                                                      srcRect.width(),
                                                                      srcRect.height());

                            SkIRect copiedSrcRect;
                            if (!copiedSrcRect.intersect(srcRect, SkIRect::MakeWH(kW, kH))) {
                                expectedResult = false;
                            } else {
                                // If the src rect was clipped, apply same clipping to each side of
                                // copied dst rect.
                                copiedDstRect.fLeft += copiedSrcRect.fLeft - srcRect.fLeft;
                                copiedDstRect.fTop += copiedSrcRect.fTop - srcRect.fTop;
                                copiedDstRect.fRight -= copiedSrcRect.fRight - srcRect.fRight;
                                copiedDstRect.fBottom -= copiedSrcRect.fBottom - srcRect.fBottom;
                            }
                            if (copiedDstRect.isEmpty() ||
                                !copiedDstRect.intersect(SkIRect::MakeWH(kW, kH))) {
                                expectedResult = false;
                            }
                            // To make the copied src rect correct we would apply any dst clipping
                            // back to the src rect, but we don't use it again so don't bother.
                            if (expectedResult != result) {
                                ERRORF(reporter, "Expected return value %d from copySurface, got "
                                       "%d.", expectedResult, result);
                                continue;
                            }

                            if (!expectedResult || !result) {
                                continue;
                            }

                            sk_memset32(read.get(), 0, kW * kH);
                            if (!dstContext->readPixels(ii, read.get(), kRowBytes, 0, 0)) {
                                ERRORF(reporter, "Error calling readPixels");
                                continue;
                            }
//.........这里部分代码省略.........

DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(RectangleTexture, reporter, ctxInfo) {
    GrContext* context = ctxInfo.grContext();
    GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();
    sk_gpu_test::GLTestContext* glContext = ctxInfo.glContext();
    static const int kWidth = 13;
    static const int kHeight = 13;

    GrColor pixels[kWidth * kHeight];
    for (int y = 0; y < kHeight; ++y) {
        for (int x = 0; x < kWidth; ++x) {
            pixels[y * kWidth + x] = y * kWidth + x;
        }
    }

    for (auto origin : { kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin }) {
        bool useBLOrigin = kBottomLeft_GrSurfaceOrigin == origin;

        GrGLuint rectTexID = glContext->createTextureRectangle(kWidth, kHeight, GR_GL_RGBA,
                                                               GR_GL_RGBA, GR_GL_UNSIGNED_BYTE,
                                                               pixels);

        if (!rectTexID) {
            return;
        }

        // Let GrContext know that we messed with the GL context directly.
        context->resetContext();

        // Wrap the rectangle texture ID in a GrTexture
        GrGLTextureInfo rectangleInfo;
        rectangleInfo.fID = rectTexID;
        rectangleInfo.fTarget = GR_GL_TEXTURE_RECTANGLE;

        GrBackendTexture rectangleTex(kWidth, kHeight, kRGBA_8888_GrPixelConfig, rectangleInfo);

        GrColor refPixels[kWidth * kHeight];
        for (int y = 0; y < kHeight; ++y) {
            for (int x = 0; x < kWidth; ++x) {
                int y0 = useBLOrigin ? kHeight - y - 1 : y;
                refPixels[y * kWidth + x] = pixels[y0 * kWidth + x];
            }
        }

        sk_sp<GrTextureProxy> rectProxy = proxyProvider->wrapBackendTexture(rectangleTex, origin);

        if (!rectProxy) {
            ERRORF(reporter, "Error creating proxy for rectangle texture.");
            GR_GL_CALL(glContext->gl(), DeleteTextures(1, &rectTexID));
            continue;
        }

        SkASSERT(rectProxy->texPriv().doesNotSupportMipMaps());
        SkASSERT(rectProxy->priv().peekTexture()->surfacePriv().doesNotSupportMipMaps());

        SkASSERT(rectProxy->texPriv().isClampOnly());
        SkASSERT(rectProxy->priv().peekTexture()->surfacePriv().isClampOnly());

        test_basic_draw_as_src(reporter, context, rectProxy, refPixels);

        // Test copy to both a texture and RT
        test_copy_from_surface(reporter, context, rectProxy.get(), refPixels,
                               false, "RectangleTexture-copy-from");

        sk_sp<GrSurfaceContext> rectContext = context->contextPriv().makeWrappedSurfaceContext(
                                                                            std::move(rectProxy));
        SkASSERT(rectContext);

        test_read_pixels(reporter, rectContext.get(), refPixels, "RectangleTexture-read");

        test_copy_to_surface(reporter, context->contextPriv().proxyProvider(),
                              rectContext.get(), "RectangleTexture-copy-to");

        test_write_pixels(reporter, rectContext.get(), true, "RectangleTexture-write");

        test_clear(reporter, rectContext.get());

        GR_GL_CALL(glContext->gl(), DeleteTextures(1, &rectTexID));
    }
}

DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadWriteAlpha, reporter, ctxInfo) {
    GrContext* context = ctxInfo.grContext();
    unsigned char alphaData[X_SIZE * Y_SIZE];

    static const int kClearValue = 0x2;

    bool match;
    static const size_t kRowBytes[] = {0, X_SIZE, X_SIZE + 1, 2 * X_SIZE - 1};
    {
        GrSurfaceDesc desc;
        desc.fFlags     = kNone_GrSurfaceFlags;
        desc.fConfig    = kAlpha_8_GrPixelConfig;    // it is a single channel texture
        desc.fWidth     = X_SIZE;
        desc.fHeight    = Y_SIZE;

        // We are initializing the texture with zeros here
        memset(alphaData, 0, X_SIZE * Y_SIZE);

        sk_sp<GrTextureProxy> proxy(GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
                                                                 desc,
                                                                 SkBudgeted::kNo,
                                                                 alphaData, 0));
        if (!proxy) {
            ERRORF(reporter, "Could not create alpha texture.");
            return;
        }
        sk_sp<GrSurfaceContext> sContext(context->contextPriv().makeWrappedSurfaceContext(
                                                                  std::move(proxy), nullptr));

        const SkImageInfo ii = SkImageInfo::MakeA8(X_SIZE, Y_SIZE);
        sk_sp<SkSurface> surf(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, ii));

        // create a distinctive texture
        for (int y = 0; y < Y_SIZE; ++y) {
            for (int x = 0; x < X_SIZE; ++x) {
                alphaData[y * X_SIZE + x] = y*X_SIZE+x;
            }
        }

        for (auto rowBytes : kRowBytes) {

            // upload the texture (do per-rowbytes iteration because we may overwrite below).
            bool result = sContext->writePixels(ii, alphaData, 0, 0, 0);
            REPORTER_ASSERT_MESSAGE(reporter, result, "Initial A8 writePixels failed");

            size_t nonZeroRowBytes = rowBytes ? rowBytes : X_SIZE;
            std::unique_ptr<uint8_t[]> readback(new uint8_t[nonZeroRowBytes * Y_SIZE]);
            // clear readback to something non-zero so we can detect readback failures
            memset(readback.get(), kClearValue, nonZeroRowBytes * Y_SIZE);

            // read the texture back
            result = sContext->readPixels(ii, readback.get(), rowBytes, 0, 0);
            REPORTER_ASSERT_MESSAGE(reporter, result, "Initial A8 readPixels failed");

            // make sure the original & read back versions match
            SkString msg;
            msg.printf("rb:%d A8", SkToU32(rowBytes));
            validate_alpha_data(reporter, X_SIZE, Y_SIZE, readback.get(), nonZeroRowBytes,
                                alphaData, msg);

            // Now try writing to a single channel surface (if we could create one).
            if (surf) {
                SkCanvas* canvas = surf->getCanvas();

                SkPaint paint;

                const SkRect rect = SkRect::MakeLTRB(-10, -10, X_SIZE + 10, Y_SIZE + 10);

                paint.setColor(SK_ColorWHITE);

                canvas->drawRect(rect, paint);

                memset(readback.get(), kClearValue, nonZeroRowBytes * Y_SIZE);
                result = surf->readPixels(ii, readback.get(), nonZeroRowBytes, 0, 0);
                REPORTER_ASSERT_MESSAGE(reporter, result, "A8 readPixels after clear failed");

                match = true;
                for (int y = 0; y < Y_SIZE && match; ++y) {
                    for (int x = 0; x < X_SIZE && match; ++x) {
                        uint8_t rbValue = readback.get()[y * nonZeroRowBytes + x];
                        if (0xFF != rbValue) {
                            ERRORF(reporter,
                                   "Failed alpha readback after clear. Expected: 0xFF, Got: 0x%02x"
                                   " at (%d,%d), rb:%d", rbValue, x, y, SkToU32(rowBytes));
                            match = false;
                        }
                    }
                }
            }
        }
    }

    static const GrPixelConfig kRGBAConfigs[] {
        kRGBA_8888_GrPixelConfig,
        kBGRA_8888_GrPixelConfig,
        kSRGBA_8888_GrPixelConfig
    };

    for (int y = 0; y < Y_SIZE; ++y) {
        for (int x = 0; x < X_SIZE; ++x) {
//.........这里部分代码省略.........

DEF_GPUTEST_FOR_RENDERING_CONTEXTS(PromiseImageTest, reporter, ctxInfo) {
    const int kWidth = 10;
    const int kHeight = 10;

    GrContext* ctx = ctxInfo.grContext();
    GrGpu* gpu = ctx->contextPriv().getGpu();

    for (bool releaseImageEarly : {true, false}) {
        GrBackendTexture backendTex = gpu->createTestingOnlyBackendTexture(
                nullptr, kWidth, kHeight, kRGBA_8888_GrPixelConfig, true, GrMipMapped::kNo);
        REPORTER_ASSERT(reporter, backendTex.isValid());

        GrBackendFormat backendFormat = backendTex.format();
        REPORTER_ASSERT(reporter, backendFormat.isValid());

        PromiseTextureChecker promiseChecker(backendTex);
        GrSurfaceOrigin texOrigin = kTopLeft_GrSurfaceOrigin;
        sk_sp<SkImage> refImg(
                SkImage_Gpu::MakePromiseTexture(ctx, backendFormat, kWidth, kHeight,
                                                GrMipMapped::kNo, texOrigin,
                                                kRGBA_8888_SkColorType, kPremul_SkAlphaType,
                                                nullptr,
                                                PromiseTextureChecker::Fulfill,
                                                PromiseTextureChecker::Release,
                                                PromiseTextureChecker::Done,
                                                &promiseChecker));

        SkImageInfo info = SkImageInfo::MakeN32Premul(kWidth, kHeight);
        sk_sp<SkSurface> surface = SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info);
        SkCanvas* canvas = surface->getCanvas();

        int expectedFulfillCnt = 0;
        int expectedReleaseCnt = 0;
        int expectedDoneCnt = 0;

        canvas->drawImage(refImg, 0, 0);
        REPORTER_ASSERT(reporter, check_fulfill_and_release_cnts(promiseChecker,
                                                                 true,
                                                                 expectedFulfillCnt,
                                                                 expectedReleaseCnt,
                                                                 true,
                                                                 expectedDoneCnt,
                                                                 reporter));

        bool isVulkan = kVulkan_GrBackend == ctx->contextPriv().getBackend();
        canvas->flush();
        expectedFulfillCnt++;
        expectedReleaseCnt++;
        REPORTER_ASSERT(reporter, check_fulfill_and_release_cnts(promiseChecker,
                                                                 !isVulkan,
                                                                 expectedFulfillCnt,
                                                                 expectedReleaseCnt,
                                                                 !isVulkan,
                                                                 expectedDoneCnt,
                                                                 reporter));

        gpu->testingOnly_flushGpuAndSync();
        REPORTER_ASSERT(reporter, check_fulfill_and_release_cnts(promiseChecker,
                                                                 true,
                                                                 expectedFulfillCnt,
                                                                 expectedReleaseCnt,
                                                                 true,
                                                                 expectedDoneCnt,
                                                                 reporter));

        canvas->drawImage(refImg, 0, 0);
        canvas->drawImage(refImg, 0, 0);

        canvas->flush();
        expectedFulfillCnt++;
        expectedReleaseCnt++;

        gpu->testingOnly_flushGpuAndSync();
        REPORTER_ASSERT(reporter, check_fulfill_and_release_cnts(promiseChecker,
                                                                 true,
                                                                 expectedFulfillCnt,
                                                                 expectedReleaseCnt,
                                                                 true,
                                                                 expectedDoneCnt,
                                                                 reporter));

        // Now test code path on Vulkan where we released the texture, but the GPU isn't done with
        // resource yet and we do another draw. We should only call fulfill on the first draw and
        // use the cached GrBackendTexture on the second. Release should only be called after the
        // second draw is finished.
        canvas->drawImage(refImg, 0, 0);
        canvas->flush();
        expectedFulfillCnt++;
        expectedReleaseCnt++;
        REPORTER_ASSERT(reporter, check_fulfill_and_release_cnts(promiseChecker,
                                                                 !isVulkan,
                                                                 expectedFulfillCnt,
                                                                 expectedReleaseCnt,
                                                                 !isVulkan,
                                                                 expectedDoneCnt,
                                                                 reporter));

        canvas->drawImage(refImg, 0, 0);

        if (releaseImageEarly) {
//.........这里部分代码省略.........

DEF_GPUTEST_FOR_VULKAN_CONTEXT(VkImageLayoutTest, reporter, ctxInfo) {
    GrContext* context = ctxInfo.grContext();
    GrVkGpu* gpu = static_cast<GrVkGpu*>(context->contextPriv().getGpu());

    GrBackendTexture backendTex = gpu->createTestingOnlyBackendTexture(nullptr, 1, 1,
                                                                       kRGBA_8888_GrPixelConfig,
                                                                       false,
                                                                       GrMipMapped::kNo);
    REPORTER_ASSERT(reporter, backendTex.isValid());

    GrVkImageInfo info;
    REPORTER_ASSERT(reporter, backendTex.getVkImageInfo(&info));
    VkImageLayout initLayout = info.fImageLayout;

    // Verify that setting that layout via a copy of a backendTexture is reflected in all the
    // backendTextures.
    GrBackendTexture backendTexCopy = backendTex;
    REPORTER_ASSERT(reporter, backendTexCopy.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, initLayout == info.fImageLayout);

    backendTexCopy.setVkImageLayout(VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);

    REPORTER_ASSERT(reporter, backendTex.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL == info.fImageLayout);

    REPORTER_ASSERT(reporter, backendTexCopy.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL == info.fImageLayout);

    // Setting back the layout since we didn't actually change it
    backendTex.setVkImageLayout(initLayout);

    sk_sp<SkImage> wrappedImage = SkImage::MakeFromTexture(context, backendTex,
                                                           kTopLeft_GrSurfaceOrigin,
                                                           kRGBA_8888_SkColorType,
                                                           kPremul_SkAlphaType, nullptr);
    REPORTER_ASSERT(reporter, wrappedImage.get());

    sk_sp<GrTextureProxy> texProxy = as_IB(wrappedImage)->asTextureProxyRef();
    REPORTER_ASSERT(reporter, texProxy.get());
    REPORTER_ASSERT(reporter, texProxy->priv().isInstantiated());
    GrTexture* texture = texProxy->priv().peekTexture();
    REPORTER_ASSERT(reporter, texture);

    // Verify that modifying the layout via the GrVkTexture is reflected in the GrBackendTexture
    GrVkTexture* vkTexture = static_cast<GrVkTexture*>(texture);
    REPORTER_ASSERT(reporter, initLayout == vkTexture->currentLayout());
    vkTexture->updateImageLayout(VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);

    REPORTER_ASSERT(reporter, backendTex.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL == info.fImageLayout);

    GrBackendTexture backendTexImage = wrappedImage->getBackendTexture(false);
    REPORTER_ASSERT(reporter, backendTexImage.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL == info.fImageLayout);

    // Verify that modifying the layout via the GrBackendTexutre is reflected in the GrVkTexture
    backendTexImage.setVkImageLayout(VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL == vkTexture->currentLayout());

#ifdef SK_SUPPORT_LEGACY_BACKEND_OBJECTS
    // Verify that modifying the layout via the old textureHandle sitll works in is reflected in the
    // GrVkTexture and GrBackendTexture.
    GrVkImageInfo* backendInfo = (GrVkImageInfo*)wrappedImage->getTextureHandle(false);
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL == backendInfo->fImageLayout);

    backendInfo->updateImageLayout(VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
    REPORTER_ASSERT(reporter,
                    VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL == vkTexture->currentLayout());
    REPORTER_ASSERT(reporter, backendTexImage.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL == info.fImageLayout);
#endif

    vkTexture->updateImageLayout(initLayout);

    REPORTER_ASSERT(reporter, backendTex.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, initLayout == info.fImageLayout);

    REPORTER_ASSERT(reporter, backendTexCopy.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, initLayout == info.fImageLayout);

    REPORTER_ASSERT(reporter, backendTexImage.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, initLayout == info.fImageLayout);

    // Check that we can do things like assigning the backend texture to invalid one, assign an
    // invalid one, assin a backend texture to inself etc. Success here is that we don't hit any of
    // our ref counting asserts.
    REPORTER_ASSERT(reporter, GrBackendTexture::TestingOnly_Equals(backendTex, backendTexCopy));

    GrBackendTexture invalidTexture;
    REPORTER_ASSERT(reporter, !invalidTexture.isValid());
    REPORTER_ASSERT(reporter, !GrBackendTexture::TestingOnly_Equals(invalidTexture, backendTexCopy));

    backendTexCopy = invalidTexture;
    REPORTER_ASSERT(reporter, !backendTexCopy.isValid());
    REPORTER_ASSERT(reporter, !GrBackendTexture::TestingOnly_Equals(invalidTexture, backendTexCopy));

    invalidTexture = backendTex;
    REPORTER_ASSERT(reporter, invalidTexture.isValid());
    REPORTER_ASSERT(reporter, GrBackendTexture::TestingOnly_Equals(invalidTexture, backendTex));

//.........这里部分代码省略.........