Example #1
0
        unsafe public static BitmapLoadData BeginLoadBitmap(Stream bitmapStream, bool isTransparent)
        {
            // .NET CF does NOT support transparent images. Need to use the COM IImageFactory to create images with alpha.
            if (myImagingFactory == null)
            {
                myImagingFactory = (IImagingFactory)Activator.CreateInstance(Type.GetTypeFromCLSID(new Guid("327ABDA8-072B-11D3-9D7B-0000F81EF32E")));
            }

            int bytesLength;

            byte[]       bytes;
            MemoryStream memStream = bitmapStream as MemoryStream;

            if (memStream != null)
            {
                bytesLength = (int)memStream.Length;
                bytes       = memStream.GetBuffer();
            }
            else
            {
                bytesLength = (int)bitmapStream.Length;
                bytes       = new byte[bytesLength];
                bitmapStream.Read(bytes, 0, bytesLength);
            }

            IImage    image;
            ImageInfo info;
            uint      hresult = myImagingFactory.CreateImageFromBuffer(bytes, (uint)bytesLength, BufferDisposalFlag.BufferDisposalFlagNone, out image);

            image.GetImageInfo(out info);

            int resizedWidth  = (int)info.Width;
            int resizedHeight = (int)info.Height;

            resizedWidth  = Texture.GetValidTextureDimensionFromSize(resizedWidth);
            resizedHeight = Texture.GetValidTextureDimensionFromSize(resizedHeight);

            int resizedDim = Math.Max(resizedWidth, resizedHeight);

            if (resizedDim == (int)info.Width && resizedDim == (int)info.Height)
            {
                resizedWidth  = 0;
                resizedHeight = 0;
            }
            else
            {
                resizedWidth  = resizedDim;
                resizedHeight = resizedDim;
            }

            IBitmapImage bitmap;

            myImagingFactory.CreateBitmapFromImage(image, (uint)resizedWidth, (uint)resizedHeight, PixelFormatID.PixelFormatDontCare, InterpolationHint.InterpolationHintDefault, out bitmap);
            Marshal.FinalReleaseComObject(image);

            Size size;

            bitmap.GetSize(out size);
            RECT            rect = new RECT(0, 0, size.Width, size.Height);
            BitmapImageData data;

            if (isTransparent)
            {
                bitmap.LockBits(ref rect, ImageLockMode.ImageLockModeWrite | ImageLockMode.ImageLockModeRead, PixelFormatID.PixelFormat32bppARGB, out data);
                for (int y = 0; y < data.Height; y++)
                {
                    for (int x = 0; x < data.Stride; x += 4)
                    {
                        byte *bp   = (byte *)data.Scan0 + data.Stride * y + x;
                        byte  temp = bp[0];
                        bp[0] = bp[2];
                        bp[2] = temp;
                    }
                }
            }
            else
            {
                bitmap.LockBits(ref rect, ImageLockMode.ImageLockModeRead, PixelFormatID.PixelFormat16bppRGB565, out data);
            }

            BitmapLoadData ret = new BitmapLoadData();

            ret.Data          = data;
            ret.Bitmap        = bitmap;
            ret.Width         = (int)info.Width;
            ret.Height        = (int)info.Height;
            ret.IsTransparent = isTransparent;

            return(ret);
        }
Example #2
0
        unsafe public OpenGLFont(Font font)
        {
            IntPtr hdc   = myTempGraphics.GetHdc();
            IntPtr hfont = font.ToHfont();

            SelectObject(hdc, hfont);

            if (!GetCharWidth32(hdc, 0, 255, CharacterWidths))
            {
                throw new SystemException("Unable to measure character widths.");
            }

            tagTEXTMETRIC metrics = new tagTEXTMETRIC();

            GetTextMetrics(hdc, ref metrics);
            myLeadingSpace  = metrics.tmInternalLeading;
            myTrailingSpace = metrics.tmExternalLeading;

            myTempGraphics.ReleaseHdc(hdc);

            int width = 0;

            for (int i = myFirstCharacterOfInterest; i <= myLastCharacterOfInterest; i++)
            {
                CharacterWidths[i] += myLeadingSpace + myTrailingSpace;
                width += CharacterWidths[i];
            }
            myHeight = (int)Math.Round(myTempGraphics.MeasureString(myCharactersOfInterest, font).Height);

            mySquareDim = (int)Math.Ceiling(Math.Sqrt(width * myHeight));
            mySquareDim = Texture.GetValidTextureDimensionFromSize(mySquareDim);
            float  fSquareDim = mySquareDim;
            Bitmap bitmap     = new Bitmap(mySquareDim, mySquareDim, PixelFormat.Format16bppRgb565);

            using (Graphics g = Graphics.FromImage(bitmap))
            {
                int x = 0;
                int y = 0;

                for (char i = myFirstCharacterOfInterest; i <= myLastCharacterOfInterest; i++)
                {
                    if (x + CharacterWidths[i] >= mySquareDim)
                    {
                        y += myHeight;
                        x  = 0;
                    }
                    CharacterLocations[i] = new Point(x, y);

                    float uStart = x / fSquareDim;
                    float uEnd   = (x + CharacterWidths[i]) / fSquareDim;
                    float vStart = y / fSquareDim;
                    float vEnd   = (y + myHeight) / fSquareDim;
                    TextureCoordinates[i] = new GlyphTexCoords(uStart, vStart, uEnd, vEnd);

                    g.DrawString(i.ToString(), font, myWhiteBrush, x, y);
                    x += CharacterWidths[i];
                }
            }

            byte[]     alphaBytes = new byte[bitmap.Width * bitmap.Height];
            BitmapData data       = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), System.Drawing.Imaging.ImageLockMode.ReadOnly, PixelFormat.Format16bppRgb565);

            int pixCount = 0;

            for (int y = 0; y < bitmap.Height; y++)
            {
                short *yp = (short *)((int)data.Scan0 + data.Stride * y);
                for (int x = 0; x < bitmap.Width; x++, pixCount++)
                {
                    short *p          = (short *)(yp + x);
                    short  pixel      = *p;
                    byte   b          = (byte)((pixel & 0x1F) << 3);
                    byte   g          = (byte)(((pixel >> 5) & 0x3F) << 2);
                    byte   r          = (byte)(((pixel >> 11) & 0x1F) << 3);
                    byte   totalAlpha = (byte)((r + g + b) / 3);
                    alphaBytes[pixCount] = totalAlpha;
                }
            }
            bitmap.UnlockBits(data);

            uint tex = 0;

            gl.GenTextures(1, &tex);
            myName = tex;
            gl.BindTexture(gl.GL_TEXTURE_2D, myName);

            fixed(byte *alphaBytesPointer = alphaBytes)
            {
                gl.TexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_ALPHA, mySquareDim, mySquareDim, 0, gl.GL_ALPHA, gl.GL_UNSIGNED_BYTE, (IntPtr)alphaBytesPointer);
            }

            gl.TexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_LINEAR);
            gl.TexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR);
            gl.TexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_WRAP_S, gl.GL_CLAMP_TO_EDGE);
            gl.TexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_WRAP_T, gl.GL_CLAMP_TO_EDGE);

            // below is debug code I used to see the results of my texture generation

            //try
            //{
            //    Directory.CreateDirectory("\\Temp");
            //}
            //catch (Exception)
            //{
            //}
            //bitmap.Save("\\temp\\temp.png", ImageFormat.Png);

            //for (int i = myFirstCharacterOfInterest; i <= myLastCharacterOfInterest; i++)
            //{
            //    using (Bitmap ch = new Bitmap(bfont.CharacterWidths[i], height, PixelFormat.Format16bppRgb565))
            //    {
            //        using (Graphics tg = Graphics.FromImage(ch))
            //        {
            //            tg.DrawImage(bitmap, 0, 0, new Rectangle(bfont.CharacterLocations[i].X, bfont.CharacterLocations[i].Y, ch.Width, ch.Height), GraphicsUnit.Pixel);
            //        }
            //        ch.Save(string.Format("\\temp\\{0}.png", i), ImageFormat.Png);
            //    }
            //}

            bitmap.Dispose();
        }