/// <summary>
        /// Initializes a new instance of the OpenGLUltravioletGraphics class.
        /// </summary>
        /// <param name="uv">The Ultraviolet context.</param>
        /// <param name="configuration">The Ultraviolet Framework configuration settings for the current context.</param>
        public OpenGLUltravioletGraphics(OpenGLUltravioletContext uv, UltravioletConfiguration configuration)
            : base(uv)
        {
            if (configuration.Debug)
            {
                SDL.GL_SetAttribute(SDL_GLattr.CONTEXT_FLAGS, (int)SDL_GLcontextFlag.DEBUG);
            }

            var masterptr = ((OpenGLUltravioletWindowInfo)uv.GetPlatform().Windows).GetMasterPointer();            
            if ((this.context = SDL.GL_CreateContext(masterptr)) == IntPtr.Zero)
                throw new SDL2Exception();

            if (SDL.GL_SetSwapInterval(0) < 0)
                throw new SDL2Exception();

            if (gl.Initialized)
            {
                gl.Uninitialize();
            }
            gl.Initialize(new OpenGLInitializer());

            OpenGLState.ResetCache();

            if (!VerifyCapabilities())
                throw new NotSupportedException(OpenGLStrings.UnsupportedGraphicsDevice);

            if (configuration.Debug && configuration.DebugCallback != null)
            {
                InitializeDebugOutput(configuration);
            }

            this.maxTextureStages = Math.Min(16, gl.GetInteger(gl.GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS));
            this.textures = new Texture2D[maxTextureStages];
            this.samplerStates = new SamplerState[maxTextureStages];

            this.capabilities = new OpenGLGraphicsCapabilities();

            ResetDeviceStates();
        }
        /// <summary>
        /// Initializes a new instance of the OpenGLUltravioletGraphics class.
        /// </summary>
        /// <param name="uv">The Ultraviolet context.</param>
        /// <param name="configuration">The Ultraviolet Framework configuration settings for the current context.</param>
        public OpenGLUltravioletGraphics(OpenGLUltravioletContext uv, UltravioletConfiguration configuration)
            : base(uv)
        {
            if (configuration.Debug)
            {
                SDL.GL_SetAttribute(SDL_GLattr.CONTEXT_FLAGS, (int)SDL_GLcontextFlag.DEBUG);
            }

            var masterptr = ((OpenGLUltravioletWindowInfo)uv.GetPlatform().Windows).GetMasterPointer();

            if ((this.context = SDL.GL_CreateContext(masterptr)) == IntPtr.Zero)
            {
                if (configuration.Debug)
                {
                    SDL.GL_SetAttribute(SDL_GLattr.CONTEXT_FLAGS, 0);

                    if ((this.context = SDL.GL_CreateContext(masterptr)) == IntPtr.Zero)
                    {
                        throw new SDL2Exception();
                    }
                }
                else
                {
                    throw new SDL2Exception();
                }
            }

            if (SDL.GL_SetSwapInterval(1) < 0)
            {
                throw new SDL2Exception();
            }

            if (gl.Initialized)
            {
                gl.Uninitialize();
            }
            gl.Initialize(new OpenGLInitializer());

            OpenGLState.ResetCache();

            if (!VerifyCapabilities())
            {
                throw new NotSupportedException(OpenGLStrings.UnsupportedGraphicsDevice);
            }

            if (configuration.Debug && configuration.DebugCallback != null)
            {
                InitializeDebugOutput(configuration);
            }

            this.capabilities = new OpenGLGraphicsCapabilities();

            this.maxTextureStages            = gl.GetInteger(gl.GL_MAX_TEXTURE_IMAGE_UNITS);
            this.textures                    = new Texture2D[maxTextureStages];
            this.samplerStates               = new SamplerState[maxTextureStages];
            this.samplerObjects              = capabilities.SupportsIndependentSamplerState ? new OpenGLSamplerObject[maxTextureStages] : null;
            this.backBufferRenderTargetUsage = configuration.BackBufferRenderTargetUsage;

            if (samplerObjects != null)
            {
                for (int i = 0; i < samplerObjects.Length; i++)
                {
                    samplerObjects[i] = new OpenGLSamplerObject(Ultraviolet);
                    samplerObjects[i].Bind((uint)i);
                }
            }

            OpenGLState.VerifyCache();

            ResetDeviceStates();
        }
        public unsafe OpenGLUltravioletGraphics(OpenGLUltravioletContext uv, OpenGLUltravioletConfiguration configuration, Version versionRequested)
            : base(uv)
        {
            var masterptr = ((OpenGLUltravioletWindowInfo)uv.GetPlatform().Windows).GetMasterPointer();
            if (!TryInitializeGLContext(masterptr, configuration))
            {
                var attemptedVersionMajor = 0;
                var attemptedVersionMinor = 0;

                if (SDL.GL_GetAttribute(SDL_GLattr.CONTEXT_MAJOR_VERSION, &attemptedVersionMajor) < 0)
                    throw new SDL2Exception();
                if (SDL.GL_GetAttribute(SDL_GLattr.CONTEXT_MINOR_VERSION, &attemptedVersionMinor) < 0)
                    throw new SDL2Exception();
                
                var attemptedVersion = new Version(attemptedVersionMajor, attemptedVersionMinor, 0, 0);

                var isGLES = (uv.Platform == UltravioletPlatform.Android || uv.Platform == UltravioletPlatform.iOS);
                if (isGLES && attemptedVersion >= new Version(3, 0) && (configuration.MinimumOpenGLESVersion ?? new Version(2, 0)) <= new Version(2, 0))
                {
                    if (SDL.GL_SetAttribute(SDL_GLattr.CONTEXT_MAJOR_VERSION, 2) < 0)
                        throw new SDL2Exception();

                    if (SDL.GL_SetAttribute(SDL_GLattr.CONTEXT_MINOR_VERSION, 0) < 0)
                        throw new SDL2Exception();

                    if (!TryInitializeGLContext(masterptr, configuration))
                        throw new SDL2Exception();
                }
                else throw new SDL2Exception();
            }

            if (SDL.GL_SetSwapInterval(1) < 0 && uv.Platform != UltravioletPlatform.iOS)
                throw new SDL2Exception();

            if (gl.Initialized)
            {
                gl.Uninitialize();
            }
            gl.Initialize(new OpenGLInitializer());
            
            if (!gl.IsVersionAtLeast(versionRequested))
                throw new InvalidOperationException(OpenGLStrings.DoesNotMeetMinimumVersionRequirement.Format(gl.MajorVersion, gl.MinorVersion, versionRequested.Major, versionRequested.Minor));
            
            OpenGLState.ResetCache();

            if (!VerifyCapabilities())
                throw new NotSupportedException(OpenGLStrings.UnsupportedGraphicsDevice);

            if (configuration.Debug && configuration.DebugCallback != null)
            {
                InitializeDebugOutput(configuration);
            }
            
            this.capabilities = new OpenGLGraphicsCapabilities();

            this.maxTextureStages = gl.GetInteger(gl.GL_MAX_TEXTURE_IMAGE_UNITS);
            this.textures = new Texture2D[maxTextureStages];
            this.samplerStates = new SamplerState[maxTextureStages];
            this.samplerObjects = capabilities.SupportsIndependentSamplerState ? new OpenGLSamplerObject[maxTextureStages] : null;
            this.backBufferRenderTargetUsage = configuration.BackBufferRenderTargetUsage;

            if (samplerObjects != null)
            {
                for (int i = 0; i < samplerObjects.Length; i++)
                {
                    samplerObjects[i] = new OpenGLSamplerObject(Ultraviolet);
                    samplerObjects[i].Bind((uint)i);
                }
            }            

            OpenGLState.VerifyCache();
        }
Beispiel #4
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        public unsafe OpenGLUltravioletGraphics(OpenGLUltravioletContext uv, OpenGLUltravioletConfiguration configuration, Version versionRequested)
            : base(uv)
        {
            var masterptr = ((OpenGLUltravioletWindowInfo)uv.GetPlatform().Windows).GetMasterPointer();

            if (!TryInitializeGLContext(masterptr, configuration))
            {
                var attemptedVersionMajor = 0;
                var attemptedVersionMinor = 0;

                if (SDL.GL_GetAttribute(SDL_GLattr.CONTEXT_MAJOR_VERSION, &attemptedVersionMajor) < 0)
                {
                    throw new SDL2Exception();
                }
                if (SDL.GL_GetAttribute(SDL_GLattr.CONTEXT_MINOR_VERSION, &attemptedVersionMinor) < 0)
                {
                    throw new SDL2Exception();
                }

                var attemptedVersion = new Version(attemptedVersionMajor, attemptedVersionMinor, 0, 0);

                var isGLES = (uv.Platform == UltravioletPlatform.Android || uv.Platform == UltravioletPlatform.iOS);
                if (isGLES && attemptedVersion >= new Version(3, 0) && (configuration.MinimumOpenGLESVersion ?? new Version(2, 0)) <= new Version(2, 0))
                {
                    if (SDL.GL_SetAttribute(SDL_GLattr.CONTEXT_MAJOR_VERSION, 2) < 0)
                    {
                        throw new SDL2Exception();
                    }

                    if (SDL.GL_SetAttribute(SDL_GLattr.CONTEXT_MINOR_VERSION, 0) < 0)
                    {
                        throw new SDL2Exception();
                    }

                    if (!TryInitializeGLContext(masterptr, configuration))
                    {
                        throw new SDL2Exception();
                    }
                }
                else
                {
                    throw new SDL2Exception();
                }
            }

            if (SDL.GL_SetSwapInterval(1) < 0 && uv.Platform != UltravioletPlatform.iOS)
            {
                throw new SDL2Exception();
            }

            if (gl.Initialized)
            {
                gl.Uninitialize();
            }
            gl.Initialize(new OpenGLInitializer());

            if (!gl.IsVersionAtLeast(versionRequested))
            {
                throw new InvalidOperationException(OpenGLStrings.DoesNotMeetMinimumVersionRequirement.Format(gl.MajorVersion, gl.MinorVersion, versionRequested.Major, versionRequested.Minor));
            }

            OpenGLState.ResetCache();

            if (!VerifyCapabilities())
            {
                throw new NotSupportedException(OpenGLStrings.UnsupportedGraphicsDevice);
            }

            if (configuration.Debug && configuration.DebugCallback != null)
            {
                InitializeDebugOutput(configuration);
            }

            this.capabilities = new OpenGLGraphicsCapabilities(configuration);

            this.maxTextureStages            = gl.GetInteger(gl.GL_MAX_TEXTURE_IMAGE_UNITS);
            this.textures                    = new Texture2D[maxTextureStages];
            this.samplerStates               = new SamplerState[maxTextureStages];
            this.samplerObjects              = capabilities.SupportsIndependentSamplerState ? new OpenGLSamplerObject[maxTextureStages] : null;
            this.backBufferRenderTargetUsage = configuration.BackBufferRenderTargetUsage;

            if (samplerObjects != null)
            {
                for (int i = 0; i < samplerObjects.Length; i++)
                {
                    samplerObjects[i] = new OpenGLSamplerObject(Ultraviolet);
                    samplerObjects[i].Bind((uint)i);
                }
            }

            OpenGLState.VerifyCache();
        }