/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

// This is a GPU-backend specific test.

#include "Test.h"

#if SK_SUPPORT_GPU
#include "GrBackendSurface.h"
#include "GrContextPriv.h"
#include "GrProxyProvider.h"
#include "GrRenderTarget.h"
#include "GrRenderTargetProxy.h"
#include "GrSurfaceProxy.h"
#include "GrTexture.h"
#include "GrTextureProxy.h"

static sk_sp<GrSurfaceProxy> make_wrapped_FBO0(GrProxyProvider* provider,
                                               skiatest::Reporter* reporter,
                                               const GrSurfaceDesc& desc,
                                               GrSurfaceOrigin origin) {
    GrGLFramebufferInfo fboInfo;
    fboInfo.fFBOID = 0;
    GrBackendRenderTarget backendRT(desc.fWidth, desc.fHeight, desc.fSampleCnt, 8,
                                    desc.fConfig, fboInfo);

    return provider->createWrappedRenderTargetProxy(backendRT, origin);
}

static sk_sp<GrSurfaceProxy> make_wrapped_offscreen_rt(GrProxyProvider* provider,
                                                       const GrSurfaceDesc& desc,
                                                       GrSurfaceOrigin origin) {
    SkASSERT(kRenderTarget_GrSurfaceFlag == desc.fFlags);

    return provider->createInstantiatedProxy(desc, origin, SkBackingFit::kExact, SkBudgeted::kYes);
}

static sk_sp<GrSurfaceProxy> make_wrapped_texture(GrProxyProvider* provider,
                                                  const GrSurfaceDesc& desc,
                                                  GrSurfaceOrigin origin) {
    return provider->createInstantiatedProxy(desc, origin, SkBackingFit::kExact, SkBudgeted::kYes);
}

// Test converting between RenderTargetProxies and TextureProxies for wrapped
// Proxies
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(WrappedProxyConversionTest, reporter, ctxInfo) {
    GrProxyProvider* proxyProvider = ctxInfo.grContext()->contextPriv().proxyProvider();

    GrSurfaceDesc desc;
    desc.fFlags = kRenderTarget_GrSurfaceFlag;
    desc.fWidth = 64;
    desc.fHeight = 64;
    desc.fConfig = kRGBA_8888_GrPixelConfig;

    if (kOpenGL_GrBackend == ctxInfo.backend()) {
        // External on-screen render target.
        sk_sp<GrSurfaceProxy> sProxy(
                make_wrapped_FBO0(proxyProvider, reporter, desc, kBottomLeft_GrSurfaceOrigin));
        if (sProxy) {
            // RenderTarget-only
            GrRenderTargetProxy* rtProxy = sProxy->asRenderTargetProxy();
            REPORTER_ASSERT(reporter, rtProxy);
            REPORTER_ASSERT(reporter, !rtProxy->asTextureProxy());
            REPORTER_ASSERT(reporter, rtProxy->asRenderTargetProxy() == rtProxy);
        }
    }

    {
        // Internal offscreen render target.
        sk_sp<GrSurfaceProxy> sProxy(
                make_wrapped_offscreen_rt(proxyProvider, desc, kBottomLeft_GrSurfaceOrigin));
        if (sProxy) {
            // Both RenderTarget and Texture
            GrRenderTargetProxy* rtProxy = sProxy->asRenderTargetProxy();
            REPORTER_ASSERT(reporter, rtProxy);
            GrTextureProxy* tProxy = rtProxy->asTextureProxy();
            REPORTER_ASSERT(reporter, tProxy);
            REPORTER_ASSERT(reporter, tProxy->asRenderTargetProxy() == rtProxy);
            REPORTER_ASSERT(reporter, rtProxy->asRenderTargetProxy() == rtProxy);
        }
    }

    {
        // Internal offscreen render target - but through GrTextureProxy
        sk_sp<GrSurfaceProxy> sProxy(
                make_wrapped_texture(proxyProvider, desc, kBottomLeft_GrSurfaceOrigin));
        if (sProxy) {
            // Both RenderTarget and Texture
            GrTextureProxy* tProxy = sProxy->asTextureProxy();
            REPORTER_ASSERT(reporter, tProxy);
            GrRenderTargetProxy* rtProxy = tProxy->asRenderTargetProxy();
            REPORTER_ASSERT(reporter, rtProxy);
            REPORTER_ASSERT(reporter, rtProxy->asTextureProxy() == tProxy);
            REPORTER_ASSERT(reporter, tProxy->asTextureProxy() == tProxy);
        }
    }

    {
        desc.fFlags = kNone_GrSurfaceFlags; // force no-RT

        sk_sp<GrSurfaceProxy> sProxy(
                make_wrapped_texture(proxyProvider, desc, kBottomLeft_GrSurfaceOrigin));
        if (sProxy) {
            // Texture-only
            GrTextureProxy* tProxy = sProxy->asTextureProxy();
            REPORTER_ASSERT(reporter, tProxy);
            REPORTER_ASSERT(reporter, tProxy->asTextureProxy() == tProxy);
            REPORTER_ASSERT(reporter, !tProxy->asRenderTargetProxy());
        }
    }
}

// Test converting between RenderTargetProxies and TextureProxies for deferred
// Proxies
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(DefferredProxyConversionTest, reporter, ctxInfo) {
    GrProxyProvider* proxyProvider = ctxInfo.grContext()->contextPriv().proxyProvider();

    GrSurfaceDesc desc;
    desc.fFlags = kRenderTarget_GrSurfaceFlag;
    desc.fWidth = 64;
    desc.fHeight = 64;
    desc.fConfig = kRGBA_8888_GrPixelConfig;

    {
        sk_sp<GrTextureProxy> proxy = proxyProvider->createProxy(
                desc, kBottomLeft_GrSurfaceOrigin, SkBackingFit::kApprox, SkBudgeted::kYes);

        // Both RenderTarget and Texture
        GrRenderTargetProxy* rtProxy = proxy->asRenderTargetProxy();
        REPORTER_ASSERT(reporter, rtProxy);
        GrTextureProxy* tProxy = rtProxy->asTextureProxy();
        REPORTER_ASSERT(reporter, tProxy);
        REPORTER_ASSERT(reporter, tProxy->asRenderTargetProxy() == rtProxy);
        REPORTER_ASSERT(reporter, rtProxy->asRenderTargetProxy() == rtProxy);
    }

    {
        sk_sp<GrTextureProxy> proxy = proxyProvider->createProxy(
                desc, kBottomLeft_GrSurfaceOrigin, SkBackingFit::kApprox, SkBudgeted::kYes);

        // Both RenderTarget and Texture - but via GrTextureProxy
        GrTextureProxy* tProxy = proxy->asTextureProxy();
        REPORTER_ASSERT(reporter, tProxy);
        GrRenderTargetProxy* rtProxy = tProxy->asRenderTargetProxy();
        REPORTER_ASSERT(reporter, rtProxy);
        REPORTER_ASSERT(reporter, rtProxy->asTextureProxy() == tProxy);
        REPORTER_ASSERT(reporter, tProxy->asTextureProxy() == tProxy);
    }

    {
        desc.fFlags = kNone_GrSurfaceFlags; // force no-RT

        sk_sp<GrTextureProxy> proxy = proxyProvider->createProxy(
                desc, kTopLeft_GrSurfaceOrigin, SkBackingFit::kApprox, SkBudgeted::kYes);
        // Texture-only
        GrTextureProxy* tProxy = proxy->asTextureProxy();
        REPORTER_ASSERT(reporter, tProxy);
        REPORTER_ASSERT(reporter, tProxy->asTextureProxy() == tProxy);
        REPORTER_ASSERT(reporter, !tProxy->asRenderTargetProxy());
    }
}
#endif