/// <inheritdoc/>
        public override Surface2D CreateSurface(Rectangle region)
        {
            Contract.EnsureNotDisposed(this, Disposed);

            if (region.Left < 0 || region.Top < 0 || region.Right > Width || region.Bottom > Height || region.Width <= 0 || region.Height <= 0)
            {
                throw new ArgumentOutOfRangeException("region");
            }

            var copysurf = new SDL2PlatformNativeSurface(region.Width, region.Height);

            var srcrect = new SDL_Rect()
            {
                x = region.X, y = region.Y, w = region.Width, h = region.Height
            };
            var dstrect = new SDL_Rect()
            {
                x = 0, y = 0, w = region.Width, h = region.Height
            };

            if (SDL_BlitSurface(nativesurf.NativePtr, &srcrect, copysurf.NativePtr, &dstrect) < 0)
            {
                throw new SDL2Exception();
            }

            var options = SrgbEncoded ? SurfaceOptions.SrgbColor : SurfaceOptions.LinearColor;
            var result  = new SDL2Surface2D(Ultraviolet, copysurf, options);

            return(result);
        }
        /// <inheritdoc/>
        public override Texture2D CreateTexture(Boolean unprocessed)
        {
            Contract.EnsureNotDisposed(this, Disposed);

            if (unprocessed)
            {
                var options = TextureOptions.ImmutableStorage | (SrgbEncoded ? TextureOptions.SrgbColor : TextureOptions.LinearColor);
                return(Texture2D.CreateTexture((IntPtr)NativePtr->pixels, Width, Height, BytesPerPixel, options));
            }
            else
            {
                using (var copysurf = new SDL2PlatformNativeSurface(Width, Height))
                {
                    if (SDL_BlitSurface(nativesurf.NativePtr, null, copysurf.NativePtr, null) < 0)
                    {
                        throw new SDL2Exception();
                    }

                    copysurf.Flip(Ultraviolet.GetGraphics().Capabilities.FlippedTextures ?
                                  SurfaceFlipDirection.Vertical : SurfaceFlipDirection.None);

                    var options = TextureOptions.ImmutableStorage | (SrgbEncoded ? TextureOptions.SrgbColor : TextureOptions.LinearColor);
                    return(Texture2D.CreateTexture((IntPtr)copysurf.NativePtr->pixels, copysurf.Width, copysurf.Height, copysurf.BytesPerPixel, options));
                }
            }
        }
Beispiel #3
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        /// <inheritdoc/>
        public override PlatformNativeSurface CreateCopy()
        {
            Contract.EnsureNotDisposed(this, Disposed);

            var copy = new SDL2PlatformNativeSurface(Width, Height);

            if (SDL_BlitSurface(ptr, null, copy.ptr, null) < 0)
            {
                throw new SDL2Exception();
            }

            copy.isReadyForTextureExport = isReadyForTextureExport;
            copy.isFlippedVertically     = isFlippedVertically;
            copy.isFlippedHorizontally   = isFlippedHorizontally;
            copy.isAlphaPremultiplied    = isAlphaPremultiplied;

            return(copy);
        }