C# Texture.GetLevelDescription方法代碼示例

        /// <summary>
        /// Render method is called directly by renderer. Depending on stage, post process can do various things 
        /// </summary>
        /// <param name="postProcessStage">Stage indicating in which part renderer currently is.</param>public override void RenderAfterBlendLights()
        public override Texture Render(PostProcessStage postProcessStage, Texture source, Texture availableRenderTarget)
        {
            switch (postProcessStage)
            {
                case PostProcessStage.HDR:
                    {
                        MyMinerGame.SetRenderTarget(availableRenderTarget, null);
                        MyEffectContrast effectContrast = MyRender.GetEffect(MyEffects.Contrast) as MyEffectContrast;


                        effectContrast.SetDiffuseTexture(source);
                        effectContrast.SetHalfPixel(MyUtils.GetHalfPixel(source.GetLevelDescription(0).Width, source.GetLevelDescription(0).Height));
                        effectContrast.SetContrast(Contrast);
                        effectContrast.SetHue(Hue);
                        effectContrast.SetSaturation(Saturation);

                        MyGuiManager.GetFullscreenQuad().Draw(effectContrast);

                        return availableRenderTarget;
                    }
                    break;
            }

            return source;
        }

        public override Texture Render(PostProcessStage postProcessStage, Texture source, Texture availableRenderTarget)
        {
            switch (postProcessStage)
            {
                case PostProcessStage.AlphaBlended:
                    {
                        BlendState.Opaque.Apply();
                        DepthStencilState.None.Apply();
                        RasterizerState.CullCounterClockwise.Apply();

                        MyRender.SetRenderTarget(availableRenderTarget, null);

                        MyEffectChromaticAberration effectChromaAberr = MyRender.GetEffect(MyEffects.ChromaticAberration) as MyEffectChromaticAberration;
                        effectChromaAberr.SetInputTexture(source);
                        effectChromaAberr.SetHalfPixel(source.GetLevelDescription(0).Width, source.GetLevelDescription(0).Height);
                        effectChromaAberr.SetAspectRatio((float)source.GetLevelDescription(0).Width / (float)source.GetLevelDescription(0).Height);
                        effectChromaAberr.SetDistortionLens(DistortionLens);
                        effectChromaAberr.SetDistortionCubic(DistortionCubic);
                        effectChromaAberr.SetDistortionWeights(ref DistortionWeights);

                        effectChromaAberr.Enable();

                        MyRender.GetFullscreenQuad().Draw(effectChromaAberr);
                        return availableRenderTarget;
                    }
            }
            return source;
        }

        /// <summary>
        /// Render method is called directly by renderer. Depending on stage, post process can do various things 
        /// </summary>
        /// <param name="postProcessStage">Stage indicating in which part renderer currently is.</param>public override void RenderAfterBlendLights()
        public override Texture Render(PostProcessStage postProcessStage, Texture source, Texture availableRenderTarget)
        {
            switch (postProcessStage)
            {
                case PostProcessStage.AlphaBlended:
                    {
                        BlendState.Opaque.Apply();
                        DepthStencilState.None.Apply();
                        RasterizerState.CullCounterClockwise.Apply();

                        MyRender.SetRenderTarget(availableRenderTarget, null);

                        MyEffectAntiAlias effectAntiAlias = MyRender.GetEffect(MyEffects.AntiAlias) as MyEffectAntiAlias;
                        effectAntiAlias.SetDiffuseTexture(source);
                        effectAntiAlias.SetHalfPixel(source.GetLevelDescription(0).Width, source.GetLevelDescription(0).Height);

                        if (MyRenderConstants.RenderQualityProfile.EnableFXAA)
                            effectAntiAlias.ApplyFxaa();
                        else
                            return source; // Nothing to do, return source

                        MyRender.GetFullscreenQuad().Draw(effectAntiAlias);
                        return availableRenderTarget;
                    }
                    break;
            }
            return source;
        }

 public static void DrawCentered(this Sprite sprite,
     Texture texture,
     Vector2 position,
     Rectangle? rectangle = null)
 {
     var desc = texture.GetLevelDescription(0);
     sprite.Draw(
         texture, new ColorBGRA(255, 255, 255, 255), rectangle,
         new Vector3(-(position.X - desc.Width / 2f), -(position.Y - desc.Height / 2f), 0));
 }

        public override Texture Render(PostProcessStage postProcessStage, Texture source, Texture availableRenderTarget)
        {
            switch (postProcessStage)
            {
                case PostProcessStage.AlphaBlended:
                {
                    BlendState.Opaque.Apply();
                    DepthStencilState.None.Apply();
                    RasterizerState.CullCounterClockwise.Apply();

                    MyRender.SetRenderTarget(availableRenderTarget, null);

                    MyEffectColorMapping effect = MyRender.GetEffect(MyEffects.ColorMapping) as MyEffectColorMapping;
                    effect.SetInputTexture(source);
                    effect.SetHalfPixel(source.GetLevelDescription(0).Width, source.GetLevelDescription(0).Height);
                    effect.Enable();

                    MyRender.GetFullscreenQuad().Draw(effect);
                    return availableRenderTarget;
                }
            }
            return source;
        }

        public TextureBase(DeviceContext context, Texture texture)
            : base(context)
        {
            _texture = texture;

            SurfaceDescription desc = _texture.GetLevelDescription(0);

            _width = desc.Width;
            _height = desc.Height;
            _size = new Vector2(_width, _height);
            _levelCount = _texture.LevelCount;
            _usage = desc.Usage;
            _format = desc.Format;
            _pool = desc.Pool;

            #if DEBUG
            Context.PerformanceMonitor.IncreaseLifetimeCounter(LifetimeCounters.TextureCount);
            #endif
        }

        /// <summary>
        /// Downscales the source to 1/4th size, using mipmaps
        /// !! IMPORTANT !! you cannot just switch function call. Also changing RTs is necessary.
        /// </summary>
        protected void GenerateDownscale4(Texture sourceMod, Texture sourceDiv, Texture destination, MyEffectScale effect)
        {
            effect.SetTechnique(MyEffectScale.Technique.Downscale4);

            MyMinerGame.SetRenderTarget(destination, null);

            effect.SetSourceTextureMod(sourceMod);
            effect.SetSourceTextureDiv(sourceDiv);
            //effect.SetLumTexture(currentFrameAdaptedLuminance);
            effect.SetHalfPixel(sourceMod.GetLevelDescription(0).Width, sourceMod.GetLevelDescription(0).Height);

            MyGuiManager.GetFullscreenQuad().Draw(effect);
        }

        /*
        private void CalculateAverageLuminance(RenderTarget2D source, RenderTarget2D destination, MyEffectLuminance luminanceEffect, MyEffectScale scalingEffect, float dt, float tau)
        {
            // Calculate the initial luminance
            luminanceEffect.SetTechniqueLuminance();
            PostProcess(source, destination, luminanceEffect);

            //// Repeatedly downscale    
            //scalingEffect.SetTechniqueDownscale();
            //for (int i = 1; i < luminanceChain.Length; i++)
            //{
            //    scalingEffect.SetSourceDimensions(luminanceChain[i - 1].Width, luminanceChain[i - 1].Height);
            //    PostProcess(luminanceChain[i - 1], luminanceChain[i], scalingEffect);
            //}

            //// Final downscale           
            //scalingEffect.SetTechniqueDownscaleLuminance();
            //scalingEffect.SetSourceDimensions(luminanceChain[luminanceChain.Length - 1].Width, luminanceChain[luminanceChain.Length - 1].Height);
            //PostProcess(luminanceChain[luminanceChain.Length - 1], currentFrameLuminance, scalingEffect);

            // Final downscale
            luminanceEffect.SetTechniqueLuminanceMipmap();
            float size = MathHelper.Min(MyCamera.ForwardViewport.Width, MyCamera.ForwardViewport.Height);
            // TODO check if mipmap level is correct
            int mipLevel = (int)Math.Floor(Math.Log(size / 8.0f, 2));
            //int mipLevel = (int)Math.Ceiling(Math.Log(size / 8.0f, 2));
            luminanceEffect.SetMipLevel(mipLevel);
            PostProcess(destination, currentFrameLuminance, luminanceEffect);

            // Adapt the luminance, to simulate slowly adjust exposure
            MyMinerGame.Static.GraphicsDevice.SetRenderTarget(currentFrameAdaptedLuminance);
            luminanceEffect.SetTechniqueAdaptedLuminance();
            luminanceEffect.SetDT(dt);
            luminanceEffect.SetTau(tau);
            luminanceEffect.SetSourceTexture(currentFrameLuminance);
            luminanceEffect.SetSourceTexture2(lastFrameAdaptedLuminance);
            luminanceEffect.SetHalfPixel(source.Width, source.Height);
            MyGuiManager.GetFullscreenQuad().Draw(luminanceEffect);
        }
        */

        private void HDR(Texture sourceMod, Texture sourceDiv, Texture bloomSource, MyEffectHDR effect, float middleGrey, float exposure)
        {
            effect.SetSourceTextureMod(sourceMod);
            effect.SetSourceTextureDiv(sourceDiv);
            effect.SetBloomTexture(bloomSource);
            //effect.SetLumTexture(currentFrameAdaptedLuminance);
            //effect.SetLumTexture(currentFrameLuminance);
            effect.SetHalfPixel(sourceMod.GetLevelDescription(0).Width, sourceMod.GetLevelDescription(0).Height);
            //effect.SetMiddleGrey(middleGrey);
            effect.SetExposure(exposure);

            MyGuiManager.GetFullscreenQuad().Draw(effect);
        }

        private void Blur(Texture sourceAndDestination, Texture aux, MyEffectGaussianBlur effect, float verticalBlurAmount, float horizontalBlurAmount)
        {
            effect.SetHalfPixel(sourceAndDestination.GetLevelDescription(0).Width, sourceAndDestination.GetLevelDescription(0).Height);

            int numberOfBlurPasses = Convert.ToInt32(Math.Floor(NumberOfBlurPasses));
            for (int i = 0; i < numberOfBlurPasses; i++)
            {
                // Apply vertical gaussian blur
                MyMinerGame.SetRenderTarget(aux, null);
                effect.BlurAmount = verticalBlurAmount;
                effect.SetSourceTexture(sourceAndDestination);
                //effect.SetWidthForHorisontalPass(sourceAndDestination.Width);
                effect.SetHeightForVerticalPass(sourceAndDestination.GetLevelDescription(0).Height);
                MyGuiManager.GetFullscreenQuad().Draw(effect);

                // Apply horizontal gaussian blur
                MyMinerGame.SetRenderTarget(sourceAndDestination, null);
                effect.BlurAmount = horizontalBlurAmount;
                effect.SetSourceTexture(aux);
                //effect.SetHeightForVerticalPass(sourceAndDestination.Height);
                effect.SetWidthForHorisontalPass(aux.GetLevelDescription(0).Width);
                MyGuiManager.GetFullscreenQuad().Draw(effect);
            }
        }

        //  Draws sprite batch at specified position
        //  normalizedPosition -> X and Y are within interval <0..1>
        //  scale -> scale for original texture, it's not in pixel/texels, but multiply of original size. E.g. 1 means unchanged size, 2 means double size. Scale is uniform, preserves aspect ratio.
        //  rotation -> angle in radians. Rotation is always around "origin" coordinate
        //  originNormalized -> the origin of the sprite. Specify (0,0) for the upper-left corner.
        //  RETURN: Method returns rectangle where was sprite/texture drawn in normalized coordinates
        internal static void DrawSpriteBatch(Texture texture, Vector2 normalizedCoord, float scale, Color color, MyGuiDrawAlignEnum drawAlign, Vector2 rightVector, Vector2 originNormalized)
        {
            System.Diagnostics.Debug.Assert(m_spriteBatchUsageCount > 0);
            if (texture == null)
                return;

            if (m_screenshot != null && m_screenshot.IgnoreSprites)
                return;

            Vector2 screenCoord = GetScreenCoordinateFromNormalizedCoordinate(normalizedCoord);

            //  Fix the scale for screen resolution
            float fixedScale = scale * m_safeScreenScale;

            Vector2 sizeInPixels = new Vector2(texture.GetLevelDescription(0).Width, texture.GetLevelDescription(0).Height);
            Vector2 sizeInPixelsScaled = sizeInPixels * fixedScale;

            screenCoord = GetAlignedCoordinate(screenCoord, sizeInPixelsScaled, drawAlign);

            //m_spriteBatch.Draw(texture, SharpDXHelper.ToSharpDX(screenCoord), null, SharpDXHelper.ToSharpDX(color), rotation, SharpDXHelper.ToSharpDX(originNormalized * sizeInPixels), fixedScale, SpriteEffects.None, 0);
            RectangleF rect = new RectangleF(screenCoord.X, screenCoord.Y, fixedScale, fixedScale);
            Vector2 origin = originNormalized * sizeInPixels;
            m_spriteBatch.DrawSprite(texture, null, ref rect, true, null, color, rightVector, ref origin, VRageRender.Graphics.SpriteEffects.None, 0);
        }

 public void SetSourceTexture(Texture renderTarget2D)
 {
     m_D3DEffect.SetTexture(m_source, renderTarget2D);
     m_D3DEffect.SetValue(m_halfPixel, MyUtils.GetHalfPixel(renderTarget2D.GetLevelDescription(0).Width, renderTarget2D.GetLevelDescription(0).Height));
 }

        static void DrawVertexBuffer(Texture depthForParticlesRT, List<MyBillboard> billboards)
        {
            //  This is important for optimalization (although I don't know when it can happen to have zero billboards), but
            //  also that loop below needs it - as it assumes we are rendering at least one billboard.
            if (billboards.Count == 0)
                return;

            Device device = MyRender.GraphicsDevice;
            Surface oldTargets = null;

            DepthStencilState previousState = null;
            if (MyRender.Settings.VisualizeOverdraw)
            {
                oldTargets = device.GetRenderTarget(0);

                //We borrow lod0normals to render stencil
                MyRender.SetRenderTarget(MyRender.GetRenderTarget(MyRenderTargets.Auxiliary0), null);
                device.Clear(ClearFlags.Target | ClearFlags.Stencil, new ColorBGRA(0), 1.0f, 0);

                previousState = MyStateObjects.StencilMask_AlwaysIncrement_DepthStencilState;
                MyStateObjects.StencilMask_AlwaysIncrement_DepthStencilState.Apply();
            }
            else
            {
                previousState = DepthStencilState.None;
                DepthStencilState.None.Apply();
            }

            //  Draw particles without culling. It's because how we calculate left/up vector, we can have problems in back camera. (yes, that can be solved, but why bother...)
            //  Also I guess that drawing without culling may be faster - as GPU doesn't have to check it
            // No it's not, correct culling is faster: http://msdn.microsoft.com/en-us/library/windows/desktop/bb204882(v=vs.85).aspx
            RasterizerState.CullNone.Apply();

            MyEffectTransparentGeometry effect = MyRender.GetEffect(MyEffects.TransparentGeometry) as MyEffectTransparentGeometry;

            effect.SetWorldMatrix(Matrix.Identity);

            Matrix viewMatrix = MyRenderCamera.ViewMatrixAtZero;
            effect.SetViewMatrix(ref viewMatrix);

            effect.SetProjectionMatrix(ref MyRenderCamera.ProjectionMatrix);

            Viewport originalViewport = MyRender.GraphicsDevice.Viewport;

            effect.SetDepthsRT(depthForParticlesRT);
            effect.SetHalfPixel(depthForParticlesRT.GetLevelDescription(0).Width, depthForParticlesRT.GetLevelDescription(0).Height);
            effect.SetScale(MyRender.GetScaleForViewport(depthForParticlesRT));

            // Later we can interpolate between Main and Aux
            effect.SetEnvironmentMap(MyRender.GetRenderTargetCube(MyRenderTargets.EnvironmentCube));

            //For struct size checks
            //int stride = MyVertexFormatTransparentGeometry.VertexDeclaration.VertexStride;
            //int s = Marshal.SizeOf(new MyVertexFormatTransparentGeometry());


            //  We iterate over all sorted billboards, and seach for when texture/shader has changed.
            //  We try to draw as many billboards as possible (using the same texture), but because we are rendering billboards
            //  sorted by depth, we still need to switch sometimes. Btw: I have observed, that most time consuming when drawing particles
            //  is device.DrawUserPrimitives(), even if I call it for the whole list of billboards (without this optimization). I think, it's
            //  because particles are pixel-bound (I do a lot of light calculation + there is blending, which is always slow).
            MyTransparentMaterial lastMaterial = MyTransparentMaterials.GetMaterial(billboards[0].Material);
            MyBillboard lastBillboard = billboards[0];
            MyTransparentMaterial lastBlendMaterial = lastBillboard.BlendMaterial != null ? MyTransparentMaterials.GetMaterial(lastBillboard.BlendMaterial) : null;


            bool ignoreDepth = false;
            Matrix projectionMatrix = MyRenderCamera.ProjectionMatrix;
            Matrix invProjectionMatrix = Matrix.Invert(projectionMatrix);
            effect.SetInverseDefaultProjectionMatrix(ref invProjectionMatrix);

            if (lastBillboard.CustomViewProjection != -1)
            {
                SetupCustomViewProjection(effect, ref originalViewport, lastBillboard, ref ignoreDepth, ref projectionMatrix);
            }

            // 0.05% of billboard is blended
            const float softColorizeSize = 0.05f;

            device.VertexDeclaration = MyVertexFormatTransparentGeometry.VertexDeclaration;
            device.SetStreamSource(0, m_vertexBuffer, 0, MyVertexFormatTransparentGeometry.Stride);
            device.Indices = m_indexBuffer;

            MyRender.GetShadowRenderer().SetupShadowBaseEffect(effect);

            MyEffectTransparentGeometry effect2 = MyRender.GetEffect(MyEffects.TransparentGeometry) as MyEffectTransparentGeometry;
            effect2.SetShadowBias(0.001f);

            MyLights.UpdateEffectReflector(effect2.Reflector, false);
            MyLights.UpdateEffect(effect2, false);


            int geomCount = billboards.Count;
            int it = 0;
            int cnt = 0;

            while (geomCount > 0)
            {
                if (geomCount > RENDER_BUFFER_SIZE)
                {
//.........這裏部分代碼省略.........

        //  Draws sprite batch at specified position
        //  normalizedPosition -> X and Y are within interval <0..1>
        //  scale -> scale for original texture, it's not in pixel/texels, but multiply of original size. E.g. 1 means unchanged size, 2 means double size. Scale is uniform, preserves aspect ratio.
        //  rotation -> angle in radians. Rotation is always around "origin" coordinate
        //  originNormalized -> the origin of the sprite. Specify (0,0) for the upper-left corner.
        //  RETURN: Method returns rectangle where was sprite/texture drawn in normalized coordinates
        public static void DrawSpriteBatch(Texture texture, Vector2 normalizedCoord, float scale, Color color, MyGuiDrawAlignEnum drawAlign, float rotation, Vector2 originNormalized)
        {
            System.Diagnostics.Debug.Assert(m_spriteBatchUsageCount > 0);
            if (texture == null)
                return;

            Vector2 screenCoord = GetScreenCoordinateFromNormalizedCoordinate(normalizedCoord);

            //  Fix the scale for screen resolution
            float fixedScale = scale * m_safeScreenScale;

            Vector2 sizeInPixels = new Vector2(texture.GetLevelDescription(0).Width, texture.GetLevelDescription(0).Height);
            Vector2 sizeInPixelsScaled = sizeInPixels * fixedScale;

            screenCoord = GetAlignedCoordinate(screenCoord, sizeInPixelsScaled, drawAlign);

            m_spriteBatch.Draw(texture, SharpDXHelper.ToSharpDX(screenCoord), null, SharpDXHelper.ToSharpDX(color), rotation, SharpDXHelper.ToSharpDX(originNormalized * sizeInPixels), fixedScale, SpriteEffects.None, 0);
        }

 private void BlitToThumbnail(Device device, Texture renderTarget)
 {       
     MyMinerGame.SetRenderTarget(renderTarget, null);
     var screenEffect = MyRender.GetEffect(MyEffects.Scale) as MyEffectScale;
     Debug.Assert(screenEffect != null);
     screenEffect.SetTechnique(MyEffectScale.Technique.HWScalePrefabPreviews);
     screenEffect.SetSourceTextureMod(m_fullSizeRT);
     //screenEffect.SetScale(2f * new Vector2(renderTarget.Width / (float)m_fullSizeRT.Width, renderTarget.Height / (float)m_fullSizeRT.Height));
     screenEffect.SetScale(2f * new Vector2((renderTarget.GetLevelDescription(0).Width - 1) / (float)m_fullSizeRT.GetLevelDescription(0).Width, (renderTarget.GetLevelDescription(0).Height - 1) / (float)m_fullSizeRT.GetLevelDescription(0).Height));
     MyGuiManager.GetFullscreenQuad().Draw(screenEffect);
     MyMinerGame.SetRenderTarget(null, null);  
 }

 protected static Texture CreateTextureCopy(Texture sourceTexture, out SizeF textureSize)
 {
   if (sourceTexture == null)
   {
     textureSize = new SizeF();
     return null;
   }
   SurfaceDescription desc = sourceTexture.GetLevelDescription(0);
   textureSize = new SizeF(desc.Width, desc.Height);
   DeviceEx device = SkinContext.Device;
   Texture result = new Texture(device, desc.Width, desc.Height, 1, Usage.None, Format.A8R8G8B8, Pool.Default);
   using(Surface target = result.GetSurfaceLevel(0))
   using(Surface source = sourceTexture.GetSurfaceLevel(0))
     device.StretchRectangle(source, target, TextureFilter.None);
   return result;
 }