コード例 #1
0
ファイル: ArtText.cs プロジェクト: zszqwe/dp2
        // 2016/10/5 改造为利用下级 Bitmap 函数
        // parameters:
        //      nWidth  控制折行的位置
        public static MemoryStream BuildArtText(
            string strText,
            string strFontFace,
            float fFontSize,
            FontStyle fontstyle,
            Color colorText,
            Color colorBack,
            Color colorShadow,
            ArtEffect effect,
            ImageFormat imageformat,
            int nWidth = 500)
        {
            // 正式的图像
            using (Bitmap bitmapDest = BuildArtText(strText,
                                                    strFontFace,
                                                    fFontSize,
                                                    fontstyle,
                                                    colorText,
                                                    colorBack,
                                                    colorShadow,
                                                    effect,
                                                    nWidth))
            {
                MemoryStream stream = new MemoryStream();

                if (imageformat == ImageFormat.Png &&
                    colorBack == Color.Transparent)
                {
                    bitmapDest.MakeTransparent(colorBack);
                }

                if (imageformat == ImageFormat.Gif)
                {
                    bitmapDest.MakeTransparent(
                        colorBack);

                    OctreeQuantizer quantizer = new OctreeQuantizer(255, 8);
                    quantizer.TransparentColor = colorBack;

                    using (Bitmap quantized = quantizer.Quantize(bitmapDest))
                    {
                        quantized.Save(stream, imageformat);
                    }
                }
                else
                {
                    bitmapDest.Save(stream, imageformat);   // System.Drawing.Imaging.ImageFormat.Jpeg
                }

                return(stream);
            }
        }
コード例 #2
0
        //  max_width   100% 50%
        //  x   "center" "0" "width"
        public static MemoryStream PaintText(
            string strSourceFileName,
            string strText,
            TextInfo info,
            string s_x,
            string s_y,
            string s_max_width,
            string s_max_height,
            ImageFormat imageformat)
        {
            SizeF size;

            using (Image source = Image.FromFile(strSourceFileName))
            {
                int width  = source.Width;
                int height = source.Height;

                int x = 0;

                if (s_x != "center")
                {
                    x = GetValue(s_x,
                                 width,
                                 width,
                                 height);
                }

                int y = GetValue(s_y,
                                 height,
                                 width,
                                 height);
                int max_width = GetValue(s_max_width,
                                         width,
                                         width,
                                         height);
                int max_height = GetValue(s_max_height,
                                          height,
                                          width,
                                          height);
                Font font = null;
                try
                {
                    using (Bitmap bitmapTemp = new Bitmap(1, 1))
                    {
                        using (Graphics graphicsTemp = Graphics.FromImage(bitmapTemp))
                        {
                            int text_height = (int)((float)max_height * 0.8);
                            // 第一次测算,按照最大高度
                            font = new Font(info.FontFace, text_height, info.fontstyle, GraphicsUnit.Pixel);

                            size = graphicsTemp.MeasureString(
                                strText,
                                font);

                            int width_delta = (int)size.Width - max_width;
                            if (width_delta > 0)
                            {
                                int nFontHeight = (int)((float)text_height * ((float)max_width / size.Width));
                                if (font != null)
                                {
                                    font.Dispose();
                                }
                                font = new Font(info.FontFace, nFontHeight, info.fontstyle, GraphicsUnit.Pixel);
                                y   += (text_height - nFontHeight) / 2;
                            }

                            if ((info.effect & ArtEffect.Shadow) == ArtEffect.Shadow)
                            {
                                size.Height += 2;
                                size.Width  += 2;
                            }
                        }
                    }

                    // 正式的图像
                    using (Bitmap bitmapDest = new Bitmap(
                               source.Width,                            //                (int)size.Width + 1,
                               Math.Max(source.Height, y + max_height), // (int)size.Height + 1,
                               PixelFormat.Format64bppPArgb))
                    {
                        using (Graphics objGraphics = Graphics.FromImage(bitmapDest))
                        {
                            objGraphics.Clear(info.colorBack);// Color.Transparent

                            objGraphics.DrawImageUnscaled(source, new Point(0, 0));


                            //
                            objGraphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
                            // System.Drawing.Text.TextRenderingHint oldrenderhint = objGraphics.TextRenderingHint;
                            //设置高质量,低速度呈现平滑程度
                            objGraphics.SmoothingMode     = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                            objGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;

                            StringFormat stringFormat = new StringFormat();

                            if (s_x == "center")
                            {
                                stringFormat.Alignment = StringAlignment.Center;
                                x          = 0;
                                size.Width = source.Width;
                            }
                            else
                            {
                                stringFormat.Alignment = StringAlignment.Near;
                            }

                            using (Brush objBrush = new SolidBrush(info.colorText)) // 透明颜色 ' Color.Black
                            {
                                RectangleF rect = new RectangleF(x,
                                                                 y,
                                                                 size.Width,
                                                                 size.Height);

                                if ((info.effect & ArtEffect.Shadow) == ArtEffect.Shadow)
                                {
                                    using (Brush objBrushShadow = new SolidBrush(info.colorShadow))
                                    {
                                        RectangleF rectShadow = new RectangleF(rect.X,
                                                                               rect.Y, rect.Width, rect.Height);
                                        rectShadow.Offset(2, 2);
                                        objGraphics.DrawString(strText,
                                                               font,
                                                               objBrushShadow,
                                                               rectShadow,
                                                               stringFormat);
                                    }
                                }

                                objGraphics.DrawString(strText,
                                                       font,
                                                       objBrush,
                                                       rect,
                                                       stringFormat);
                            }

                            MemoryStream stream = new MemoryStream();

                            if (imageformat == ImageFormat.Gif)
                            {
                                bitmapDest.MakeTransparent(
                                    info.colorBack);

                                OctreeQuantizer quantizer = new OctreeQuantizer(255, 8);
                                quantizer.TransparentColor = info.colorBack;

                                using (Bitmap quantized = quantizer.Quantize(bitmapDest))
                                {
                                    quantized.Save(stream, imageformat);
                                }
                            }
                            else
                            {
                                bitmapDest.Save(stream, imageformat);   // System.Drawing.Imaging.ImageFormat.Jpeg
                            }

                            return(stream);
                        }
                    }
                }
                finally
                {
                    if (font != null)
                    {
                        font.Dispose();
                    }
                }
            }
        }
コード例 #3
0
        // parameters:
        //      nWidth  控制折行的位置
        public static MemoryStream BuildArtText(
            string strText,
            string strFontFace,
            float fFontSize,
            FontStyle fontstyle,
            Color colorText,
            Color colorBack,
            Color colorShadow,
            ArtEffect effect,
            ImageFormat imageformat,
            int nWidth = 500)
        {
            SizeF size;

            using (Font font = new Font(strFontFace, fFontSize, fontstyle))
            {
                using (Bitmap bitmapTemp = new Bitmap(1, 1))
                {
                    using (Graphics graphicsTemp = Graphics.FromImage(bitmapTemp))
                    {
                        size = graphicsTemp.MeasureString(
                            strText,
                            font,
                            nWidth);

                        if ((effect & ArtEffect.Shadow) == ArtEffect.Shadow)
                        {
                            size.Height += 2;
                            size.Width  += 2;
                        }
                    }
                }

                // 正式的图像
                using (Bitmap bitmapDest = new Bitmap((int)size.Width + 1, (int)size.Height + 1, PixelFormat.Format64bppPArgb))
                {
                    using (Graphics objGraphics = Graphics.FromImage(bitmapDest))
                    {
                        // colorBack = Color.FromArgb(0, colorBack);
                        objGraphics.Clear(colorBack);// Color.Transparent

                        //
                        objGraphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
                        // System.Drawing.Text.TextRenderingHint oldrenderhint = objGraphics.TextRenderingHint;
                        //设置高质量,低速度呈现平滑程度
                        objGraphics.SmoothingMode     = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                        objGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
                        // objGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;

                        StringFormat stringFormat = new StringFormat();
                        stringFormat.Alignment     = StringAlignment.Near;
                        stringFormat.LineAlignment = StringAlignment.Center;    // 2016/5/24

                        // Color.FromArgb(128, 100, 100, 100)
                        using (Brush objBrush = new SolidBrush(colorText)) // 透明颜色 ' Color.Black
                        {
                            RectangleF rect = new RectangleF(0, 0, size.Width, size.Height);

                            if ((effect & ArtEffect.Shadow) == ArtEffect.Shadow)
                            {
                                using (Brush objBrushShadow = new SolidBrush(colorShadow))
                                {
                                    RectangleF rectShadow = new RectangleF(rect.X,
                                                                           rect.Y, rect.Width, rect.Height);
                                    rectShadow.Offset(2, 2);
                                    objGraphics.DrawString(strText,
                                                           font,
                                                           objBrushShadow,
                                                           rectShadow,
                                                           stringFormat);
                                }
                            }

                            objGraphics.DrawString(strText,
                                                   font,
                                                   objBrush,
                                                   rect,
                                                   stringFormat);
                        }
                    }

                    MemoryStream stream = new MemoryStream();

                    /*
                     * stream = SaveGIFWithNewColorTable(
                     *  bitmapDest,
                     *  256,
                     *  true);
                     */
                    if (imageformat == ImageFormat.Png &&
                        colorBack == Color.Transparent)
                    {
                        bitmapDest.MakeTransparent(colorBack);
                    }

                    if (imageformat == ImageFormat.Gif)
                    {
                        bitmapDest.MakeTransparent(
                            colorBack);

                        OctreeQuantizer quantizer = new OctreeQuantizer(255, 8);
                        quantizer.TransparentColor = colorBack;

                        using (Bitmap quantized = quantizer.Quantize(bitmapDest))
                        {
                            quantized.Save(stream, imageformat);
                        }
                    }
                    else
                    {
                        bitmapDest.Save(stream, imageformat);   // System.Drawing.Imaging.ImageFormat.Jpeg
                    }

                    return(stream);
                }
            }
        }