Exemplo n.º 1
0
        public void Initialize()
        {
            int[] configAttributes = new[]
            {
                Egl.EGL_RED_SIZE, 8,
                Egl.EGL_GREEN_SIZE, 8,
                Egl.EGL_BLUE_SIZE, 8,
                Egl.EGL_ALPHA_SIZE, 8,
                Egl.EGL_DEPTH_SIZE, 8,
                Egl.EGL_STENCIL_SIZE, 8,
                Egl.EGL_NONE
            };

            int[] contextAttributes = new[]
            {
                Egl.EGL_CONTEXT_CLIENT_VERSION, 2,
                Egl.EGL_NONE
            };

            EGLDisplay[] configs = new EGLDisplay[1];
            if ((Egl.eglChooseConfig(eglDisplay, configAttributes, configs, configs.Length, out int numConfigs) == Egl.EGL_FALSE) || (numConfigs == 0))
            {
                throw new Exception("Failed to choose first EGLConfig");
            }
            eglConfig = configs[0];

            eglContext = Egl.eglCreateContext(eglDisplay, eglConfig, Egl.EGL_NO_CONTEXT, contextAttributes);
            if (eglContext == Egl.EGL_NO_CONTEXT)
            {
                throw new Exception("Failed to create EGL context");
            }
        }
Exemplo n.º 2
0
        private void Initialize()
        {
            int[] configAttributes = new[]
            {
                Egl.EGL_RED_SIZE, 8,
                Egl.EGL_GREEN_SIZE, 8,
                Egl.EGL_BLUE_SIZE, 8,
                Egl.EGL_ALPHA_SIZE, 8,
                Egl.EGL_DEPTH_SIZE, 8,
                Egl.EGL_STENCIL_SIZE, 8,
                Egl.EGL_NONE
            };

            int[] contextAttributes = new[]
            {
                Egl.EGL_CONTEXT_CLIENT_VERSION, 2,
                Egl.EGL_NONE
            };

            int[] defaultDisplayAttributes = new[]
            {
                // These are the default display attributes, used to request ANGLE's D3D11 renderer.
                // eglInitialize will only succeed with these attributes if the hardware supports D3D11 Feature Level 10_0+.
                Egl.EGL_PLATFORM_ANGLE_TYPE_ANGLE, Egl.EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE,

                // EGL_ANGLE_DISPLAY_ALLOW_RENDER_TO_BACK_BUFFER is an optimization that can have large performance benefits on mobile devices.
                // Its syntax is subject to change, though. Please update your Visual Studio templates if you experience compilation issues with it.
                Egl.EGL_ANGLE_DISPLAY_ALLOW_RENDER_TO_BACK_BUFFER, Egl.EGL_TRUE,

                // EGL_PLATFORM_ANGLE_ENABLE_AUTOMATIC_TRIM_ANGLE is an option that enables ANGLE to automatically call
                // the IDXGIDevice3::Trim method on behalf of the application when it gets suspended.
                // Calling IDXGIDevice3::Trim when an application is suspended is a Windows Store application certification requirement.
                Egl.EGL_PLATFORM_ANGLE_ENABLE_AUTOMATIC_TRIM_ANGLE, Egl.EGL_TRUE,
                Egl.EGL_NONE,
            };

            int[] fl9_3DisplayAttributes = new[]
            {
                // These can be used to request ANGLE's D3D11 renderer, with D3D11 Feature Level 9_3.
                // These attributes are used if the call to eglInitialize fails with the default display attributes.
                Egl.EGL_PLATFORM_ANGLE_TYPE_ANGLE, Egl.EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE,
                Egl.EGL_PLATFORM_ANGLE_MAX_VERSION_MAJOR_ANGLE, 9,
                Egl.EGL_PLATFORM_ANGLE_MAX_VERSION_MINOR_ANGLE, 3,
                Egl.EGL_ANGLE_DISPLAY_ALLOW_RENDER_TO_BACK_BUFFER, Egl.EGL_TRUE,
                Egl.EGL_PLATFORM_ANGLE_ENABLE_AUTOMATIC_TRIM_ANGLE, Egl.EGL_TRUE,
                Egl.EGL_NONE,
            };

            int[] warpDisplayAttributes = new[]
            {
                // These attributes can be used to request D3D11 WARP.
                // They are used if eglInitialize fails with both the default display attributes and the 9_3 display attributes.
                Egl.EGL_PLATFORM_ANGLE_TYPE_ANGLE, Egl.EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE,
                Egl.EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE, Egl.EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE,
                Egl.EGL_ANGLE_DISPLAY_ALLOW_RENDER_TO_BACK_BUFFER, Egl.EGL_TRUE,
                Egl.EGL_PLATFORM_ANGLE_ENABLE_AUTOMATIC_TRIM_ANGLE, Egl.EGL_TRUE,
                Egl.EGL_NONE,
            };

            EGLConfig config = IntPtr.Zero;

            //
            // To initialize the display, we make three sets of calls to eglGetPlatformDisplayEXT and eglInitialize, with varying
            // parameters passed to eglGetPlatformDisplayEXT:
            // 1) The first calls uses "defaultDisplayAttributes" as a parameter. This corresponds to D3D11 Feature Level 10_0+.
            // 2) If eglInitialize fails for step 1 (e.g. because 10_0+ isn't supported by the default GPU), then we try again
            //    using "fl9_3DisplayAttributes". This corresponds to D3D11 Feature Level 9_3.
            // 3) If eglInitialize fails for step 2 (e.g. because 9_3+ isn't supported by the default GPU), then we try again
            //    using "warpDisplayAttributes".  This corresponds to D3D11 Feature Level 11_0 on WARP, a D3D11 software rasterizer.
            //

            // This tries to initialize EGL to D3D11 Feature Level 10_0+. See above comment for details.
            eglDisplay = Egl.eglGetPlatformDisplayEXT(Egl.EGL_PLATFORM_ANGLE_ANGLE, Egl.EGL_DEFAULT_DISPLAY, defaultDisplayAttributes);
            if (eglDisplay == Egl.EGL_NO_DISPLAY)
            {
                throw new Exception("Failed to get EGL display");
            }

            if (Egl.eglInitialize(eglDisplay, out int major, out int minor) == Egl.EGL_FALSE)
            {
                // This tries to initialize EGL to D3D11 Feature Level 9_3, if 10_0+ is unavailable (e.g. on some mobile devices).
                eglDisplay = Egl.eglGetPlatformDisplayEXT(Egl.EGL_PLATFORM_ANGLE_ANGLE, Egl.EGL_DEFAULT_DISPLAY, fl9_3DisplayAttributes);
                if (eglDisplay == Egl.EGL_NO_DISPLAY)
                {
                    throw new Exception("Failed to get EGL display");
                }

                if (Egl.eglInitialize(eglDisplay, out major, out minor) == Egl.EGL_FALSE)
                {
                    // This initializes EGL to D3D11 Feature Level 11_0 on WARP, if 9_3+ is unavailable on the default GPU.
                    eglDisplay = Egl.eglGetPlatformDisplayEXT(Egl.EGL_PLATFORM_ANGLE_ANGLE, Egl.EGL_DEFAULT_DISPLAY, warpDisplayAttributes);
                    if (eglDisplay == Egl.EGL_NO_DISPLAY)
                    {
                        throw new Exception("Failed to get EGL display");
                    }

                    if (Egl.eglInitialize(eglDisplay, out major, out minor) == Egl.EGL_FALSE)
                    {
                        // If all of the calls to eglInitialize returned EGL_FALSE then an error has occurred.
                        throw new Exception("Failed to initialize EGL");
                    }
                }
            }

            EGLDisplay[] configs = new EGLDisplay[1];
            if ((Egl.eglChooseConfig(eglDisplay, configAttributes, configs, configs.Length, out int numConfigs) == Egl.EGL_FALSE) || (numConfigs == 0))
            {
                throw new Exception("Failed to choose first EGLConfig");
            }
            eglConfig = configs[0];

            eglContext = Egl.eglCreateContext(eglDisplay, eglConfig, Egl.EGL_NO_CONTEXT, contextAttributes);
            if (eglContext == Egl.EGL_NO_CONTEXT)
            {
                throw new Exception("Failed to create EGL context");
            }
        }