//
// Copyright 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// D3DTextureTest:
//   Tests of the EGL_ANGLE_d3d_texture_client_buffer extension

#include "test_utils/ANGLETest.h"

#include <d3d11.h>
#include <windows.h>

#include "com_utils.h"

namespace angle
{

class D3DTextureTest : public ANGLETest
{
  protected:
    D3DTextureTest()
    {
        setWindowWidth(128);
        setWindowHeight(128);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

    void SetUp() override
    {
        ANGLETest::SetUp();

        // clang-format off
        const std::string vsSource = SHADER_SOURCE
        (
            precision highp float;
            attribute vec4 position;
            varying vec2 texcoord;

            void main()
            {
                gl_Position = position;
                texcoord = (position.xy * 0.5) + 0.5;
                texcoord.y = 1.0 - texcoord.y;
            }
        );

        const std::string textureFSSource = SHADER_SOURCE
        (
            precision highp float;
            uniform sampler2D tex;
            varying vec2 texcoord;

            void main()
            {
                gl_FragColor = texture2D(tex, texcoord);
            }
        );
        // clang-format on

        mTextureProgram = CompileProgram(vsSource, textureFSSource);
        ASSERT_NE(0u, mTextureProgram) << "shader compilation failed.";

        mTextureUniformLocation = glGetUniformLocation(mTextureProgram, "tex");
        ASSERT_NE(-1, mTextureUniformLocation);

        mD3D11Module = LoadLibrary(TEXT("d3d11.dll"));
        ASSERT_NE(nullptr, mD3D11Module);

        PFN_D3D11_CREATE_DEVICE createDeviceFunc = reinterpret_cast<PFN_D3D11_CREATE_DEVICE>(
            GetProcAddress(mD3D11Module, "D3D11CreateDevice"));

        EGLWindow *window  = getEGLWindow();
        EGLDisplay display = window->getDisplay();
        if (eglDisplayExtensionEnabled(display, "EGL_EXT_device_query"))
        {
            PFNEGLQUERYDISPLAYATTRIBEXTPROC eglQueryDisplayAttribEXT =
                reinterpret_cast<PFNEGLQUERYDISPLAYATTRIBEXTPROC>(
                    eglGetProcAddress("eglQueryDisplayAttribEXT"));
            PFNEGLQUERYDEVICEATTRIBEXTPROC eglQueryDeviceAttribEXT =
                reinterpret_cast<PFNEGLQUERYDEVICEATTRIBEXTPROC>(
                    eglGetProcAddress("eglQueryDeviceAttribEXT"));

            EGLDeviceEXT device = 0;
            {
                EGLAttrib result = 0;
                EXPECT_EGL_TRUE(eglQueryDisplayAttribEXT(display, EGL_DEVICE_EXT, &result));
                device = reinterpret_cast<EGLDeviceEXT>(result);
            }

            if (eglDeviceExtensionEnabled(device, "EGL_ANGLE_device_d3d"))
            {
                EGLAttrib result = 0;
                if (eglQueryDeviceAttribEXT(device, EGL_D3D11_DEVICE_ANGLE, &result))
                {
                    mD3D11Device = reinterpret_cast<ID3D11Device *>(result);
                    mD3D11Device->AddRef();
                }
                else if (eglQueryDeviceAttribEXT(device, EGL_D3D9_DEVICE_ANGLE, &result))
                {
                    mD3D9Device = reinterpret_cast<IDirect3DDevice9 *>(result);
                    mD3D9Device->AddRef();
                }
            }
        }
        else
        {
            ASSERT_TRUE(
                SUCCEEDED(createDeviceFunc(nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, 0, nullptr,
                                           0, D3D11_SDK_VERSION, &mD3D11Device, nullptr, nullptr)));
        }
    }

    void TearDown() override
    {
        glDeleteProgram(mTextureProgram);

        if (mD3D11Device)
        {
            mD3D11Device->Release();
            mD3D11Device = nullptr;
        }

        FreeLibrary(mD3D11Module);
        mD3D11Module = nullptr;

        if (mD3D9Device)
        {
            mD3D9Device->Release();
            mD3D9Device = nullptr;
        }

        ANGLETest::TearDown();
    }

    EGLSurface createPBuffer(size_t width,
                             size_t height,
                             EGLint eglTextureFormat,
                             EGLint eglTextureTarget)
    {
        EGLWindow *window  = getEGLWindow();
        EGLDisplay display = window->getDisplay();
        EGLConfig config   = window->getConfig();

        EGLint attribs[] = {
            EGL_TEXTURE_FORMAT, eglTextureFormat, EGL_TEXTURE_TARGET,
            eglTextureTarget,   EGL_NONE,         EGL_NONE,
        };

        if (mD3D11Device)
        {
            ID3D11Texture2D *texture = nullptr;
            CD3D11_TEXTURE2D_DESC desc(DXGI_FORMAT_R8G8B8A8_UNORM, static_cast<UINT>(width),
                                       static_cast<UINT>(height), 1, 1,
                                       D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET);
            EXPECT_TRUE(SUCCEEDED(mD3D11Device->CreateTexture2D(&desc, nullptr, &texture)));

            EGLSurface pbuffer = eglCreatePbufferFromClientBuffer(display, EGL_D3D_TEXTURE_ANGLE,
                                                                  texture, config, attribs);

            texture->Release();

            return pbuffer;
        }
        else if (mD3D9Device)
        {
            IDirect3DTexture9 *texture = nullptr;
            EXPECT_TRUE(SUCCEEDED(mD3D9Device->CreateTexture(
                static_cast<UINT>(width), static_cast<UINT>(height), 1, D3DUSAGE_RENDERTARGET,
                D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &texture, nullptr)));

            EGLSurface pbuffer = eglCreatePbufferFromClientBuffer(display, EGL_D3D_TEXTURE_ANGLE,
                                                                  texture, config, attribs);

            texture->Release();

            return pbuffer;
        }
        else
        {
            return EGL_NO_SURFACE;
        }
    }

    bool valid() const
    {
        EGLWindow *window  = getEGLWindow();
        EGLDisplay display = window->getDisplay();
        if (!eglDisplayExtensionEnabled(display, "EGL_ANGLE_d3d_texture_client_buffer"))
        {
            std::cout << "Test skipped due to missing EGL_ANGLE_d3d_texture_client_buffer"
                      << std::endl;
            return false;
        }

        if (!mD3D11Device && !mD3D9Device)
        {
            std::cout << "Test skipped due to no D3D devices being available." << std::endl;
            return false;
        }

        if (IsWindows() && IsAMD() && IsOpenGL())
        {
            std::cout << "Test skipped on Windows AMD OpenGL." << std::endl;
            return false;
        }

        if (IsWindows() && IsIntel() && IsOpenGL())
        {
            std::cout << "Test skipped on Windows Intel OpenGL." << std::endl;
            return false;
        }
        return true;
    }

    GLuint mTextureProgram;
    GLint mTextureUniformLocation;

    HMODULE mD3D11Module       = nullptr;
    ID3D11Device *mD3D11Device = nullptr;

    IDirect3DDevice9 *mD3D9Device = nullptr;
};

// Test creating a pbuffer from a d3d surface and clearing it
TEST_P(D3DTextureTest, Clear)
{
    if (!valid())
    {
        return;
    }

    EGLWindow *window  = getEGLWindow();
    EGLDisplay display = window->getDisplay();

    const size_t bufferSize = 32;

    EGLSurface pbuffer = createPBuffer(bufferSize, bufferSize, EGL_NO_TEXTURE, EGL_NO_TEXTURE);
    ASSERT_EGL_SUCCESS();
    ASSERT_NE(pbuffer, EGL_NO_SURFACE);

    // Apply the Pbuffer and clear it to purple and verify
    eglMakeCurrent(display, pbuffer, pbuffer, window->getContext());
    ASSERT_EGL_SUCCESS();

    glViewport(0, 0, static_cast<GLsizei>(bufferSize), static_cast<GLsizei>(bufferSize));
    glClearColor(1.0f, 0.0f, 1.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_EQ(static_cast<GLint>(bufferSize) / 2, static_cast<GLint>(bufferSize) / 2, 255, 0,
                    255, 255);

    eglDestroySurface(display, pbuffer);
}

// Test creating a pbuffer from a d3d surface and binding it to a texture
TEST_P(D3DTextureTest, BindTexImage)
{
    if (!valid())
    {
        return;
    }

    EGLWindow *window = getEGLWindow();

    const size_t bufferSize = 32;

    EGLSurface pbuffer = createPBuffer(bufferSize, bufferSize, EGL_TEXTURE_RGBA, EGL_TEXTURE_2D);
    ASSERT_EGL_SUCCESS();
    ASSERT_NE(pbuffer, EGL_NO_SURFACE);

    // Apply the Pbuffer and clear it to purple
    eglMakeCurrent(window->getDisplay(), pbuffer, pbuffer, window->getContext());
    ASSERT_EGL_SUCCESS();

    glViewport(0, 0, static_cast<GLsizei>(bufferSize), static_cast<GLsizei>(bufferSize));
    glClearColor(1.0f, 0.0f, 1.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    ASSERT_GL_NO_ERROR();

    EXPECT_PIXEL_EQ(static_cast<GLint>(bufferSize) / 2, static_cast<GLint>(bufferSize) / 2, 255, 0,
                    255, 255);

    // Apply the window surface
    eglMakeCurrent(window->getDisplay(), window->getSurface(), window->getSurface(),
                   window->getContext());

    // Create a texture and bind the Pbuffer to it
    GLuint texture = 0;
    glGenTextures(1, &texture);
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    EXPECT_GL_NO_ERROR();

    eglBindTexImage(window->getDisplay(), pbuffer, EGL_BACK_BUFFER);
    glViewport(0, 0, getWindowWidth(), getWindowHeight());
    ASSERT_EGL_SUCCESS();

    // Draw a quad and verify that it is purple
    glUseProgram(mTextureProgram);
    glUniform1i(mTextureUniformLocation, 0);

    drawQuad(mTextureProgram, "position", 0.5f);
    EXPECT_GL_NO_ERROR();

    // Unbind the texture
    eglReleaseTexImage(window->getDisplay(), pbuffer, EGL_BACK_BUFFER);
    ASSERT_EGL_SUCCESS();

    // Verify that purple was drawn
    EXPECT_PIXEL_EQ(getWindowWidth() / 2, getWindowHeight() / 2, 255, 0, 255, 255);

    glDeleteTextures(1, &texture);
}

// Use this to select which configurations (e.g. which renderer, which GLES major version) these
// tests should be run against.
ANGLE_INSTANTIATE_TEST(D3DTextureTest, ES2_D3D9(), ES2_D3D11(), ES2_OPENGL());

}  // namespace