//
// Copyright(c) 2014 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.
//

// entry_points_ext.cpp : Implements the EGL extension entry points.

#include "libGLESv2/entry_points_egl_ext.h"
#include "libGLESv2/global_state.h"

#include "libANGLE/Display.h"
#include "libANGLE/Device.h"
#include "libANGLE/Surface.h"
#include "libANGLE/validationEGL.h"

#include "common/debug.h"

namespace egl
{

// EGL_ANGLE_query_surface_pointer
EGLBoolean EGLAPIENTRY QuerySurfacePointerANGLE(EGLDisplay dpy, EGLSurface surface, EGLint attribute, void **value)
{
    EVENT("(EGLDisplay dpy = 0x%0.8p, EGLSurface surface = 0x%0.8p, EGLint attribute = %d, void **value = 0x%0.8p)",
          dpy, surface, attribute, value);

    Display *display = static_cast<Display*>(dpy);
    Surface *eglSurface = static_cast<Surface*>(surface);

    Error error = ValidateSurface(display, eglSurface);
    if (error.isError())
    {
        SetGlobalError(error);
        return EGL_FALSE;
    }

    if (!display->getExtensions().querySurfacePointer)
    {
        SetGlobalError(Error(EGL_SUCCESS));
        return EGL_FALSE;
    }

    if (surface == EGL_NO_SURFACE)
    {
        SetGlobalError(Error(EGL_BAD_SURFACE));
        return EGL_FALSE;
    }

    // validate the attribute parameter
    switch (attribute)
    {
      case EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE:
        if (!display->getExtensions().surfaceD3DTexture2DShareHandle)
        {
            SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
            return EGL_FALSE;
        }
        break;
      case EGL_DXGI_KEYED_MUTEX_ANGLE:
        if (!display->getExtensions().keyedMutex)
        {
            SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
            return EGL_FALSE;
        }
        break;
      default:
        SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
        return EGL_FALSE;
    }

    error = eglSurface->querySurfacePointerANGLE(attribute, value);
    SetGlobalError(error);
    return (error.isError() ? EGL_FALSE : EGL_TRUE);
}


// EGL_NV_post_sub_buffer
EGLBoolean EGLAPIENTRY PostSubBufferNV(EGLDisplay dpy, EGLSurface surface, EGLint x, EGLint y, EGLint width, EGLint height)
{
    EVENT("(EGLDisplay dpy = 0x%0.8p, EGLSurface surface = 0x%0.8p, EGLint x = %d, EGLint y = %d, EGLint width = %d, EGLint height = %d)", dpy, surface, x, y, width, height);

    if (x < 0 || y < 0 || width < 0 || height < 0)
    {
        SetGlobalError(Error(EGL_BAD_PARAMETER));
        return EGL_FALSE;
    }

    Display *display = static_cast<Display*>(dpy);
    Surface *eglSurface = static_cast<Surface*>(surface);

    Error error = ValidateSurface(display, eglSurface);
    if (error.isError())
    {
        SetGlobalError(error);
        return EGL_FALSE;
    }

    if (display->isDeviceLost())
    {
        SetGlobalError(Error(EGL_CONTEXT_LOST));
        return EGL_FALSE;
    }

    if (surface == EGL_NO_SURFACE)
    {
        SetGlobalError(Error(EGL_BAD_SURFACE));
        return EGL_FALSE;
    }

    if (!display->getExtensions().postSubBuffer)
    {
        // Spec is not clear about how this should be handled.
        SetGlobalError(Error(EGL_SUCCESS));
        return EGL_TRUE;
    }

    error = eglSurface->postSubBuffer(x, y, width, height);
    if (error.isError())
    {
        SetGlobalError(error);
        return EGL_FALSE;
    }

    SetGlobalError(Error(EGL_SUCCESS));
    return EGL_TRUE;
}

// EGL_EXT_platform_base
EGLDisplay EGLAPIENTRY GetPlatformDisplayEXT(EGLenum platform, void *native_display, const EGLint *attrib_list)
{
    EVENT("(EGLenum platform = %d, void* native_display = 0x%0.8p, const EGLint* attrib_list = 0x%0.8p)",
          platform, native_display, attrib_list);

    const ClientExtensions &clientExtensions = Display::getClientExtensions();

    switch (platform)
    {
      case EGL_PLATFORM_ANGLE_ANGLE:
        if (!clientExtensions.platformANGLE)
        {
            SetGlobalError(Error(EGL_BAD_PARAMETER));
            return EGL_NO_DISPLAY;
        }
        break;
      case EGL_PLATFORM_DEVICE_EXT:
          if (!clientExtensions.platformDevice)
          {
              SetGlobalError(Error(EGL_BAD_PARAMETER, "Platform Device extension is not active"));
              return EGL_NO_DISPLAY;
          }
          break;
      default:
        SetGlobalError(Error(EGL_BAD_CONFIG));
        return EGL_NO_DISPLAY;
    }

    if (platform == EGL_PLATFORM_ANGLE_ANGLE)
    {
        EGLint platformType          = EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE;
        EGLint deviceType            = EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE;
        bool majorVersionSpecified   = false;
        bool minorVersionSpecified   = false;
        bool enableAutoTrimSpecified = false;
        bool deviceTypeSpecified     = false;
        bool presentPathSpecified    = false;

        if (attrib_list)
        {
            for (const EGLint *curAttrib = attrib_list; curAttrib[0] != EGL_NONE; curAttrib += 2)
            {
                switch (curAttrib[0])
                {
                    case EGL_PLATFORM_ANGLE_TYPE_ANGLE:
                        switch (curAttrib[1])
                    {
                        case EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE:
                            break;

                        case EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE:
                        case EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE:
                            if (!clientExtensions.platformANGLED3D)
                            {
                                SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
                                return EGL_NO_DISPLAY;
                            }
                            break;

                        case EGL_PLATFORM_ANGLE_TYPE_OPENGL_ANGLE:
                        case EGL_PLATFORM_ANGLE_TYPE_OPENGLES_ANGLE:
                            if (!clientExtensions.platformANGLEOpenGL)
                            {
                                SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
                                return EGL_NO_DISPLAY;
                            }
                            break;

                        default:
                        SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
                        return EGL_NO_DISPLAY;
                    }
                    platformType = curAttrib[1];
                    break;

                    case EGL_PLATFORM_ANGLE_MAX_VERSION_MAJOR_ANGLE:
                        if (curAttrib[1] != EGL_DONT_CARE)
                        {
                            majorVersionSpecified = true;
                        }
                        break;

                    case EGL_PLATFORM_ANGLE_MAX_VERSION_MINOR_ANGLE:
                        if (curAttrib[1] != EGL_DONT_CARE)
                        {
                            minorVersionSpecified = true;
                        }
                        break;

                    case EGL_PLATFORM_ANGLE_ENABLE_AUTOMATIC_TRIM_ANGLE:
                        switch (curAttrib[1])
                    {
                        case EGL_TRUE:
                        case EGL_FALSE:
                            break;
                        default:
                        SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
                        return EGL_NO_DISPLAY;
                    }
                    enableAutoTrimSpecified = true;
                    break;

                    case EGL_EXPERIMENTAL_PRESENT_PATH_ANGLE:
                        if (!clientExtensions.experimentalPresentPath)
                        {
                            SetGlobalError(
                                Error(EGL_BAD_ATTRIBUTE,
                                      "EGL_ANGLE_experimental_present_path extension not active"));
                            return EGL_NO_DISPLAY;
                        }

                        switch (curAttrib[1])
                        {
                            case EGL_EXPERIMENTAL_PRESENT_PATH_FAST_ANGLE:
                            case EGL_EXPERIMENTAL_PRESENT_PATH_COPY_ANGLE:
                                break;
                            default:
                                SetGlobalError(
                                    Error(EGL_BAD_ATTRIBUTE,
                                          "Invalid value for EGL_EXPERIMENTAL_PRESENT_PATH_ANGLE"));
                                return EGL_NO_DISPLAY;
                        }
                        presentPathSpecified = true;
                        break;

                    case EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE:
                        switch (curAttrib[1])
                        {
                            case EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE:
                            case EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE:
                            case EGL_PLATFORM_ANGLE_DEVICE_TYPE_REFERENCE_ANGLE:
                                deviceTypeSpecified = true;
                                break;

                            case EGL_PLATFORM_ANGLE_DEVICE_TYPE_NULL_ANGLE:
                                // This is a hidden option, accepted by the OpenGL back-end.
                                break;

                            default:
                                SetGlobalError(Error(EGL_BAD_ATTRIBUTE,
                                                     "Invalid value for "
                                                     "EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE "
                                                     "attrib"));
                                return EGL_NO_DISPLAY;
                        }
                        deviceType = curAttrib[1];
                    break;

                    default:
                        break;
                }
            }
        }

        if (!majorVersionSpecified && minorVersionSpecified)
        {
            SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
            return EGL_NO_DISPLAY;
        }

        if (deviceType == EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE &&
            platformType != EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE)
        {
            SetGlobalError(
                Error(EGL_BAD_ATTRIBUTE,
                      "EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE requires a device type of "
                      "EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE."));
            return EGL_NO_DISPLAY;
        }

        if (enableAutoTrimSpecified && platformType != EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE)
        {
            SetGlobalError(
                Error(EGL_BAD_ATTRIBUTE,
                      "EGL_PLATFORM_ANGLE_ENABLE_AUTOMATIC_TRIM_ANGLE requires a device type of "
                      "EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE."));
            return EGL_NO_DISPLAY;
        }

        if (presentPathSpecified && platformType != EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE)
        {
            SetGlobalError(Error(EGL_BAD_ATTRIBUTE,
                                 "EGL_EXPERIMENTAL_PRESENT_PATH_ANGLE requires a device type of "
                                 "EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE."));
            return EGL_NO_DISPLAY;
        }

        if (deviceTypeSpecified && platformType != EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE &&
            platformType != EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE)
        {
            SetGlobalError(
                Error(EGL_BAD_ATTRIBUTE,
                      "EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE requires a device type of "
                      "EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE or EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE."));
            return EGL_NO_DISPLAY;
        }

        SetGlobalError(Error(EGL_SUCCESS));
        return Display::GetDisplayFromAttribs(native_display, AttributeMap(attrib_list));
    }
    else if (platform == EGL_PLATFORM_DEVICE_EXT)
    {
        Device *eglDevice = reinterpret_cast<Device *>(native_display);
        if (eglDevice == nullptr || !Device::IsValidDevice(eglDevice))
        {
            SetGlobalError(Error(EGL_BAD_ATTRIBUTE,
                                 "native_display should be a valid EGL device if platform equals "
                                 "EGL_PLATFORM_DEVICE_EXT"));
            return EGL_NO_DISPLAY;
        }

        SetGlobalError(Error(EGL_SUCCESS));
        return Display::GetDisplayFromDevice(native_display);
    }
    else
    {
        UNREACHABLE();
        return EGL_NO_DISPLAY;
    }
}

// EGL_EXT_device_query
EGLBoolean EGLAPIENTRY QueryDeviceAttribEXT(EGLDeviceEXT device, EGLint attribute, EGLAttrib *value)
{
    EVENT("(EGLDeviceEXT device = 0x%0.8p, EGLint attribute = %d, EGLAttrib *value = 0x%0.8p)",
          device, attribute, value);

    Device *dev = static_cast<Device*>(device);
    if (dev == EGL_NO_DEVICE_EXT || !Device::IsValidDevice(dev))
    {
        SetGlobalError(Error(EGL_BAD_ACCESS));
        return EGL_FALSE;
    }

    // If the device was created by (and is owned by) a display, and that display doesn't support
    // device querying, then this call should fail
    Display *owningDisplay = dev->getOwningDisplay();
    if (owningDisplay != nullptr && !owningDisplay->getExtensions().deviceQuery)
    {
        SetGlobalError(Error(EGL_BAD_ACCESS,
                             "Device wasn't created using eglCreateDeviceANGLE, and the Display "
                             "that created it doesn't support device querying"));
        return EGL_FALSE;
    }

    Error error(EGL_SUCCESS);

    // validate the attribute parameter
    switch (attribute)
    {
      case EGL_D3D11_DEVICE_ANGLE:
      case EGL_D3D9_DEVICE_ANGLE:
        if (!dev->getExtensions().deviceD3D || dev->getType() != attribute)
        {
            SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
            return EGL_FALSE;
        }
        error = dev->getDevice(value);
        break;
      default:
        SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
        return EGL_FALSE;
    }

    SetGlobalError(error);
    return (error.isError() ? EGL_FALSE : EGL_TRUE);
}

// EGL_EXT_device_query
const char * EGLAPIENTRY QueryDeviceStringEXT(EGLDeviceEXT device, EGLint name)
{
    EVENT("(EGLDeviceEXT device = 0x%0.8p, EGLint name = %d)",
          device, name);

    Device *dev = static_cast<Device*>(device);
    if (dev == EGL_NO_DEVICE_EXT || !Device::IsValidDevice(dev))
    {
        SetGlobalError(Error(EGL_BAD_DEVICE_EXT));
        return nullptr;
    }

    const char *result;
    switch (name)
    {
      case EGL_EXTENSIONS:
        result = dev->getExtensionString().c_str();
        break;
      default:
        SetGlobalError(Error(EGL_BAD_DEVICE_EXT));
        return nullptr;
    }

    SetGlobalError(Error(EGL_SUCCESS));
    return result;
}

// EGL_EXT_device_query
EGLBoolean EGLAPIENTRY QueryDisplayAttribEXT(EGLDisplay dpy, EGLint attribute, EGLAttrib *value)
{
    EVENT("(EGLDisplay dpy = 0x%0.8p, EGLint attribute = %d, EGLAttrib *value = 0x%0.8p)",
          dpy, attribute, value);

    Display *display = static_cast<Display*>(dpy);
    Error error(EGL_SUCCESS);

    if (!display->getExtensions().deviceQuery)
    {
        SetGlobalError(Error(EGL_BAD_ACCESS));
        return EGL_FALSE;
    }

    // validate the attribute parameter
    switch (attribute)
    {
      case EGL_DEVICE_EXT:
        *value = reinterpret_cast<EGLAttrib>(display->getDevice());
        break;

      default:
        SetGlobalError(Error(EGL_BAD_ATTRIBUTE));
        return EGL_FALSE;
    }

    SetGlobalError(error);
    return (error.isError() ? EGL_FALSE : EGL_TRUE);
}

ANGLE_EXPORT EGLImageKHR EGLAPIENTRY CreateImageKHR(EGLDisplay dpy,
                                                    EGLContext ctx,
                                                    EGLenum target,
                                                    EGLClientBuffer buffer,
                                                    const EGLint *attrib_list)
{
    EVENT(
        "(EGLDisplay dpy = 0x%0.8p, EGLContext ctx = 0x%0.8p, EGLenum target = 0x%X, "
        "EGLClientBuffer buffer = 0x%0.8p, const EGLAttrib *attrib_list = 0x%0.8p)",
        dpy, ctx, target, buffer, attrib_list);

    Display *display     = static_cast<Display *>(dpy);
    gl::Context *context = static_cast<gl::Context *>(ctx);
    AttributeMap attributes(attrib_list);

    Error error = ValidateCreateImageKHR(display, context, target, buffer, attributes);
    if (error.isError())
    {
        SetGlobalError(error);
        return EGL_NO_IMAGE;
    }

    Image *image = nullptr;
    error = display->createImage(context, target, buffer, attributes, &image);
    if (error.isError())
    {
        SetGlobalError(error);
        return EGL_NO_IMAGE;
    }

    return static_cast<EGLImage>(image);
}

ANGLE_EXPORT EGLBoolean EGLAPIENTRY DestroyImageKHR(EGLDisplay dpy, EGLImageKHR image)
{
    EVENT("(EGLDisplay dpy = 0x%0.8p, EGLImage image = 0x%0.8p)", dpy, image);

    Display *display = static_cast<Display *>(dpy);
    Image *img       = static_cast<Image *>(image);

    Error error = ValidateDestroyImageKHR(display, img);
    if (error.isError())
    {
        SetGlobalError(error);
        return EGL_FALSE;
    }

    display->destroyImage(img);

    return EGL_TRUE;
}

ANGLE_EXPORT EGLDeviceEXT EGLAPIENTRY CreateDeviceANGLE(EGLint device_type,
                                                        void *native_device,
                                                        const EGLAttrib *attrib_list)
{
    EVENT(
        "(EGLint device_type = %d, void* native_device = 0x%0.8p, const EGLAttrib* attrib_list = "
        "0x%0.8p)",
        device_type, native_device, attrib_list);

    Error error = ValidateCreateDeviceANGLE(device_type, native_device, attrib_list);
    if (error.isError())
    {
        SetGlobalError(error);
        return EGL_NO_DEVICE_EXT;
    }

    Device *device = nullptr;
    error = Device::CreateDevice(native_device, device_type, &device);
    if (error.isError())
    {
        ASSERT(device == nullptr);
        SetGlobalError(error);
        return EGL_NO_DEVICE_EXT;
    }

    return device;
}

ANGLE_EXPORT EGLBoolean EGLAPIENTRY ReleaseDeviceANGLE(EGLDeviceEXT device)
{
    EVENT("(EGLDeviceEXT device = 0x%0.8p)", device);

    Device *dev = static_cast<Device *>(device);

    Error error = ValidateReleaseDeviceANGLE(dev);
    if (error.isError())
    {
        SetGlobalError(error);
        return EGL_FALSE;
    }

    SafeDelete(dev);

    return EGL_TRUE;
}
}
