private void RecalculateContentHeight()
{
_totalContentHeight = 0;
foreach (var item in _itemList)
{
var itemHeight = 0f;
if (item.Icon != null)
{
itemHeight = item.IconSize.Y;
}
itemHeight = Math.Max(itemHeight, ActualFont.GetHeight(UIScale));
itemHeight += ActualItemBackground.MinimumSize.Y;
_totalContentHeight += (int)Math.Ceiling(itemHeight);
}
_scrollBar.MaxValue = Math.Max(_scrollBar.Page, _totalContentHeight);
_updateScrollbarVisibility();
}
protected override void GetGlyphPosImpl(ActualFont actualFont, char[] buffer,
int startAt, int len,
List <GlyphPlan> glyphPlans)
{
NativeFont nativeFont = actualFont as NativeFont;
if (nativeFont == null)
{
nativeFont = ResolveForNativeFont(actualFont);
}
unsafe
{
//TODO: review proper array size here
int lim = len * 2;
ProperGlyph *properGlyphArray = stackalloc ProperGlyph[lim];
fixed(char *head = &buffer[0])
{
//we use font shaping engine here
NativeMyFontsLib.MyFtShaping(
nativeFont.NativeFontFace.HBFont,
head,
buffer.Length,
properGlyphArray);
}
//copy from proper glyph to
//create glyph plan
for (int i = 0; i < lim; ++i)
{
ProperGlyph propGlyph = properGlyphArray[i];
if (propGlyph.codepoint == 0)
{
//finish , just return
return;
}
glyphPlans.Add(new GlyphPlan((ushort)propGlyph.codepoint, 0, 0, (ushort)propGlyph.x_advance));
}
}
}
protected override void OnReadyForInitGLShaderProgram()
{
InstalledFontCollection collection = new InstalledFontCollection();
collection.LoadSystemFonts();
InstalledFont tahomaFont = collection.GetFont("tahoma", InstalledFontStyle.Normal);
FontFace tahomaFace = OpenFontLoader.LoadFont(tahomaFont.FontPath);
ActualFont actualFont = tahomaFace.GetFontAtPointSize(72);
FontGlyph glyph = (FontGlyph)actualFont.GetGlyph('K');
//var svgFont = svgFontStore.LoadFont("svg-LiberationSansFont", 300);
////PathWriter p01 = new PathWriter();
////p01.MoveTo(0, 0);
////p01.LineTo(50, 100);
////p01.LineTo(100, 0);
//////-
////p01.MoveTo(220, 10);
////p01.LineTo(50, 75);
////p01.LineTo(25, 15);
////p01.CloseFigure();
////p01.Stop();
////m_pathVxs = p01.Vxs;
//var m_pathVxs = svgFont.GetGlyph('K').originalVxs;// typeFaceForLargeA.GetGlyphForCharacter('a');
////m_pathVxs = MergeFontSubFigures(m_pathVxs);
//Affine shape_mtx = Affine.NewMatix(AffinePlan.Translate(150, 100));
//m_pathVxs = shape_mtx.TransformToVxs(m_pathVxs);
//var curveFlattener = new CurveFlattener();
//var m_pathVxs2 = curveFlattener.MakeVxs(m_pathVxs);
glyph_vx = painter.CreateRenderVx(tempSnap1 = new PixelFarm.Drawing.VertexStoreSnap(glyph.flattenVxs));
linearGrBrush2 = new LinearGradientBrush(
new PointF(0, 0), Color.Red,
new PointF(100, 100), Color.Black);
//----------------------
}
static void BuildFontGlyph(ActualFont nativefont, Typography.Rendering.SimpleFontAtlasBuilder atlasBuilder, char c)
{
//font glyph for specific font face
FontGlyph fontGlyph = nativefont.GetGlyph(c);
GlyphImage glyphImg = NativeMsdfGen.BuildMsdfFontImage(fontGlyph);
int w = glyphImg.Width;
int h = glyphImg.Height;
int[] buffer = glyphImg.GetImageBuffer();
NativeMsdfGen.SwapColorComponentFromBigEndianToWinGdi(buffer);
glyphImg.SetImageBuffer(buffer, false);
atlasBuilder.AddGlyph(0, glyphImg);
//using (Bitmap bmp = new Bitmap(w, h, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
//{
// var bmpdata = bmp.LockBits(new Rectangle(0, 0, w, h), System.Drawing.Imaging.ImageLockMode.ReadWrite, bmp.PixelFormat);
// System.Runtime.InteropServices.Marshal.Copy(buffer, 0, bmpdata.Scan0, buffer.Length);
// bmp.UnlockBits(bmpdata);
// bmp.Save("d:\\WImageTest\\a001_x1_" + (int)c + ".png");
//}
}
private void button6_Click(object sender, EventArgs e)
{
//1. load font
ActualFont font = GetActualFont("tahoma", 28);// nativeFontStore.LoadFont("tahoma", 28);
//2. get glyph
var g1 = font.GetGlyph('C');
var plans = new List <Typography.TextLayout.GlyphPlan>();
PixelFarm.Drawing.Text.TextShapingService.GetGlyphPos(font, "ABC".ToCharArray(), 0, 3, plans);
int[] glyphIndice = new int[] { 1076, 1127, 1164 };
int j = glyphIndice.Length;
var atlasBuilder = new Typography.Rendering.SimpleFontAtlasBuilder();
for (int i = 0; i < j; ++i)
{
int codepoint = glyphIndice[i];
FontGlyph fontGlyph = font.GetGlyphByIndex((uint)codepoint);
GlyphImage glyphImg = NativeMsdfGen.BuildMsdfFontImage(fontGlyph);
int w = glyphImg.Width;
int h = glyphImg.Height;
int[] buffer = glyphImg.GetImageBuffer();
NativeMsdfGen.SwapColorComponentFromBigEndianToWinGdi(buffer);
glyphImg.SetImageBuffer(buffer, false);
atlasBuilder.AddGlyph(codepoint, glyphImg);
using (Bitmap bmp = new Bitmap(w, h, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
{
var bmpdata = bmp.LockBits(new System.Drawing.Rectangle(0, 0, w, h), System.Drawing.Imaging.ImageLockMode.ReadWrite, bmp.PixelFormat);
System.Runtime.InteropServices.Marshal.Copy(buffer, 0, bmpdata.Scan0, buffer.Length);
bmp.UnlockBits(bmpdata);
bmp.Save("d:\\WImageTest\\a001_y1_" + codepoint + ".png");
}
}
//----------------------------------------------------
GlyphImage totalImg = atlasBuilder.BuildSingleImage();
using (Bitmap bmp = new Bitmap(totalImg.Width, totalImg.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
{
int[] buffer = totalImg.GetImageBuffer();
if (totalImg.IsBigEndian)
{
NativeMsdfGen.SwapColorComponentFromBigEndianToWinGdi(buffer);
totalImg.SetImageBuffer(buffer, false);
}
var bmpdata = bmp.LockBits(new System.Drawing.Rectangle(0, 0, totalImg.Width, totalImg.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, bmp.PixelFormat);
System.Runtime.InteropServices.Marshal.Copy(buffer, 0, bmpdata.Scan0, buffer.Length);
bmp.UnlockBits(bmpdata);
bmp.Save("d:\\WImageTest\\a_total.png");
}
string fontfilename = "d:\\WImageTest\\a_total.xml";
atlasBuilder.SaveFontInfo(fontfilename);
//----------------------------------
}
private void button3_Click(object sender, EventArgs e)
{
//1. load font
string fontName = "tahoma";
int fontSizeInPts = 28;
ActualFont font = GetActualFont(fontName, fontSizeInPts);
//2. get glyph
char[] fontChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".ToCharArray();
int j = fontChars.Length;
var atlasBuilder = new Typography.Rendering.SimpleFontAtlasBuilder();
atlasBuilder.SetAtlasInfo(TextureKind.Msdf, fontSizeInPts);
for (int i = 0; i < j; ++i)
{
char c = fontChars[i];
FontGlyph fontGlyph = font.GetGlyph(c);
GlyphImage glyphImg = NativeMsdfGen.BuildMsdfFontImage(fontGlyph);
int w = glyphImg.Width;
int h = glyphImg.Height;
int[] buffer = glyphImg.GetImageBuffer();
NativeMsdfGen.SwapColorComponentFromBigEndianToWinGdi(buffer);
glyphImg.SetImageBuffer(buffer, false);
atlasBuilder.AddGlyph(0, glyphImg);
using (Bitmap bmp = new Bitmap(w, h, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
{
var bmpdata = bmp.LockBits(
new System.Drawing.Rectangle(0, 0, w, h),
System.Drawing.Imaging.ImageLockMode.ReadWrite, bmp.PixelFormat);
System.Runtime.InteropServices.Marshal.Copy(buffer, 0, bmpdata.Scan0, buffer.Length);
bmp.UnlockBits(bmpdata);
bmp.Save("d:\\WImageTest\\a001_x1_" + (int)c + ".png");
}
}
//----------------------------------------------------
GlyphImage totalImg = atlasBuilder.BuildSingleImage();
using (Bitmap bmp = new Bitmap(totalImg.Width, totalImg.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
{
int[] buffer = totalImg.GetImageBuffer();
if (totalImg.IsBigEndian)
{
NativeMsdfGen.SwapColorComponentFromBigEndianToWinGdi(buffer);
totalImg.SetImageBuffer(buffer, false);
}
var bmpdata = bmp.LockBits(new System.Drawing.Rectangle(0, 0, totalImg.Width, totalImg.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, bmp.PixelFormat);
System.Runtime.InteropServices.Marshal.Copy(buffer, 0, bmpdata.Scan0, buffer.Length);
bmp.UnlockBits(bmpdata);
bmp.Save("d:\\WImageTest\\a_total.png");
}
string fontfilename = "d:\\WImageTest\\a_total.xml";
atlasBuilder.SaveFontInfo(fontfilename);
//----------------------------------
}
protected override void GetGlyphPosImpl(ActualFont actualFont, char[] buffer, int startAt, int len, List <GlyphPlan> properGlyphs)
{
//do shaping and set text layout
}
protected abstract void GetGlyphPosImpl(ActualFont actualFont, char[] buffer, int startAt, int len, List <UnscaledGlyphPlan> properGlyphs);
public static void GetGlyphPos(ActualFont actualFont, char[] buffer, int startAt, int len, List <UnscaledGlyphPlan> properGlyphs)
{
defaultSharpingService.GetGlyphPosImpl(actualFont, buffer, startAt, len, properGlyphs);
}
protected internal override void Draw(DrawingHandleScreen handle)
{
base.Draw(handle);
var font = ActualFont;
var listBg = ActualBackground;
var iconBg = ActualItemBackground;
var iconSelectedBg = ActualSelectedItemBackground;
var iconDisabledBg = ActualDisabledItemBackground;
var offset = -_scrollBar.Value;
listBg.Draw(handle, PixelSizeBox);
foreach (var item in _itemList)
{
var bg = iconBg;
if (item.Disabled)
{
bg = iconDisabledBg;
}
if (item.Selected)
{
bg = iconSelectedBg;
}
var itemHeight = 0f;
if (item.Icon != null)
{
itemHeight = item.IconSize.Y;
}
itemHeight = Math.Max(itemHeight, ActualFont.GetHeight(UIScale));
itemHeight += ActualItemBackground.MinimumSize.Y;
item.Region = UIBox2.FromDimensions(0, offset, PixelWidth, itemHeight);
bg.Draw(handle, item.Region.Value);
var contentBox = bg.GetContentBox(item.Region.Value);
var drawOffset = contentBox.TopLeft;
if (item.Icon != null)
{
if (item.IconRegion.Size == Vector2.Zero)
{
handle.DrawTextureRect(item.Icon, UIBox2.FromDimensions(drawOffset, item.Icon.Size), false, item.IconModulate, item.IconTranspose);
}
else
{
handle.DrawTextureRectRegion(item.Icon, UIBox2.FromDimensions(drawOffset, item.Icon.Size), item.IconRegion, item.IconModulate);
}
}
if (item.Text != null)
{
var textBox = new UIBox2(contentBox.Left + item.IconSize.X, contentBox.Top, contentBox.Right, contentBox.Bottom);
DrawTextInternal(handle, item.Text, textBox);
}
offset += itemHeight;
}
}
public void DrawString(char[] buffer, double x, double y)
{
int j = buffer.Length;
int buffsize = j * 2;
//resolve font from painter?
ActualFont fontImp = ff.GetFontAtPointsSize(font.SizeInPoints);
var tt = (Typography.OpenFont.Typeface)ff.GetInternalTypeface();
List <GlyphPlan> glyphPlans = new List <GlyphPlan>();
_glyphLayout.Layout(tt, font.SizeInPoints, buffer, glyphPlans);
//
//un-test version
//ActualFont fontImp = nativeFontStore.GetResolvedNativeFont(painter.CurrentFont);
//if (properGlyphs == null)
//{
// properGlyphs = new ProperGlyph[buffsize];
// TextShapingService.GetGlyphPos(fontImp, buffer, 0, buffsize, properGlyphs);
//}
//TODO: implement msdf texture
//double xpos = x;
//for (int i = 0; i < buffsize; ++i)
//{
// uint codepoint = properGlyphs[i].codepoint;
// if (codepoint == 0)
// {
// break;
// }
// //-------------------------------------------------------------
// FontGlyph glyph = fontImp.GetGlyphByIndex(codepoint);
// //glyph image32
// //-------------------------------------------------------------
// GLBitmap bmp = new GLBitmap(new LazyAggBitmapBufferProvider(glyph.glyphImage32));
// var left = glyph.glyphMatrix.img_horiBearingX;
// this.canvas2d.DrawImage(bmp,
// (float)(xpos + (left >> 6)),
// (float)(y + (glyph.glyphMatrix.bboxYmin >> 6)));
// int w = (glyph.glyphMatrix.advanceX) >> 6;
// xpos += (w);
// bmp.Dispose(); //temp here
// //-------------------------------------------------------------
//}
//-------------------------------------
//msdf texture version
double xpos = x;
int n = glyphPlans.Count;
Typography.Rendering.GlyphImage glyphImage = simpleFontAtlas.TotalGlyph;
GLBitmap glBmp = new GLBitmap(glyphImage.Width, glyphImage.Height, glyphImage.GetImageBuffer(), false);
float c_x = (float)x;
float c_y = (float)y;
//int left = ((int)(glyph.glyphMatrix.img_horiBearingX * scale) >> 6);
int left = 0;
//float baseline = c_y - 24;//eg line height= 24 //create a list
float baseline = c_y - 24;//eg line height= 24 //create a list
bool isFlipY = canvas2d.FlipY;
if (!isFlipY)
{
canvas2d.FlipY = true;
}
for (int i = 0; i < n; ++i)
{
GlyphPlan glyph = glyphPlans[i];
Typography.Rendering.TextureFontGlyphData glyphData;
if (!simpleFontAtlas.GetRectByCodePoint(glyph.glyphIndex, out glyphData))
{
//Rectangle r = glyphData.Rect;
//float x_min = glyphData.BBoxXMin / 64;
////draw each glyph at specific position
////_canvas.DrawSubImageWithMsdf(glBmp, ref r, c_x + x_min, (float)(baseline + r.Height));
//_canvas.DrawSubImageWithMsdf(glBmp, ref r, c_x + x_min, (float)(baseline + r.Height));
////c_x += r.Width - 10;
//c_x += (glyphData.AdvanceX / 64);
continue;
}
//found
PixelFarm.Drawing.Rectangle r = ConvToRect(glyphData.Rect);
//test draw full msdf gen img
//canvas2d.DrawImage(glBmp, c_x + left, (float)(baseline + ((int)(glyphData.ImgHeight))));
canvas2d.DrawSubImageWithMsdf(glBmp, ref r, c_x + left,
(float)(baseline + ((int)(glyphData.ImgHeight))), 1.0f);
c_x += glyph.advX;
}
canvas2d.FlipY = isFlipY;
glBmp.Dispose();
//temp here
//draw with texture printer ***
//char[] chars = text.ToCharArray();
//int j = chars.Length;
//int buffsize = j * 2;
////get kerning list
////get actual font for this canvas
//TextureFont currentFont = _currentTextureFont;
//SimpleFontAtlas fontAtlas = currentFont.FontAtlas;
//ProperGlyph[] properGlyphs = new ProperGlyph[buffsize];
//TextShapingService.GetGlyphPos(currentFont, chars, 0, buffsize, properGlyphs);
//GLBitmap glBmp = (GLBitmap)currentFont.GLBmp;
//if (glBmp == null)
//{
// //create glbmp
// GlyphImage glyphImage = fontAtlas.TotalGlyph;
// int[] buffer = glyphImage.GetImageBuffer();
// glBmp = new GLBitmap(glyphImage.Width, glyphImage.Height, buffer, false);
//}
////int j = chars.Length;
////
//float c_x = (float)x;
//float c_y = (float)y;
////TODO: review here ***
////-----------------
////1. layout each glyph before render ***
////
//float baseline = c_y - 24;//eg line height= 24 //create a list
////--------------
//List<float> coords = new List<float>();
//float scale = 1f;
//for (int i = 0; i < buffsize; ++i)
//{
// ProperGlyph glyph1 = properGlyphs[i];
// uint codepoint = properGlyphs[i].codepoint;
// if (codepoint == 0)
// {
// break;
// }
// //--------------------------------
// //if (codepoint == 1173 && i > 1)
// //{
// // //check prev code point
// // codepoint = 1168;
// //}
// //--------------------------------
// TextureFontGlyphData glyphData;
// if (!fontAtlas.GetRectByCodePoint((int)codepoint, out glyphData))
// {
// //Rectangle r = glyphData.Rect;
// //float x_min = glyphData.BBoxXMin / 64;
// ////draw each glyph at specific position
// ////_canvas.DrawSubImageWithMsdf(glBmp, ref r, c_x + x_min, (float)(baseline + r.Height));
// //_canvas.DrawSubImageWithMsdf(glBmp, ref r, c_x + x_min, (float)(baseline + r.Height));
// ////c_x += r.Width - 10;
// //c_x += (glyphData.AdvanceX / 64);
// continue;
// }
// FontGlyph glyph = currentFont.GetGlyphByIndex(codepoint);
// int left = ((int)(glyph.glyphMatrix.img_horiBearingX * scale) >> 6);
// Rectangle r = glyphData.Rect;
// int adjustX = 0;
// int bboxYMin = glyph.glyphMatrix.bboxYmin >> 6;
// if (bboxYMin > 1 || bboxYMin < -1)
// {
// // adjustX = 3;
// }
// //scale down 0.8;
// //_canvas.DrawSubImageWithMsdf(glBmp, ref r, adjustX + c_x + left,
// // (float)(baseline + ((int)(glyphData.ImgHeight + glyph.glyphMatrix.bboxYmin) >> 6)), 1.1f);
// coords.Add(r.Left);
// coords.Add(r.Top);
// coords.Add(r.Width);
// coords.Add(r.Height);
// //-------------------------
// coords.Add(adjustX + c_x + left);
// //coords.Add(baseline + ((int)((glyphData.ImgHeight + glyph.glyphMatrix.bboxYmin) * scale) >> 6));
// coords.Add(baseline + ((int)((glyphData.ImgHeight + glyphData.BBoxYMin) * scale) >> 6));
// //int w = (int)(glyph.glyphMatrix.advanceX * scale) >> 6;
// int w = (int)(glyph.horiz_adv_x * scale) >> 6;
// c_x += w;
//}
//_canvas.DrawSubImageWithMsdf(glBmp, coords.ToArray(), scale);
//-----------------------
//public override void DrawString(string text, double x, double y)
//{
// char[] chars = text.ToCharArray();
// int j = chars.Length;
// int buffsize = j * 2;
// //get kerning list
// TextureFont currentFont = this.CurrentFont as TextureFont;
// SimpleFontAtlas fontAtlas = currentFont.FontAtlas;
// ProperGlyph[] properGlyphs = new ProperGlyph[buffsize];
// currentFont.GetGlyphPos(chars, 0, buffsize, properGlyphs);
// GLBitmap glBmp = currentFont.GLBmp;
// if (glBmp == null)
// {
// //create glbmp
// GlyphImage glyphImage = fontAtlas.TotalGlyph;
// int[] buffer = glyphImage.GetImageBuffer();
// glBmp = new GLBitmap(glyphImage.Width, glyphImage.Height, buffer, false);
// }
// //int j = chars.Length;
// //
// float c_x = (float)x;
// float c_y = (float)y;
// //TODO: review here
// //-----------------
// //1. layout each glyph before render ***
// float baseline = c_y - 24;//eg line height= 24
// //create a list
// for (int i = 0; i < buffsize; ++i)
// {
// ProperGlyph glyph1 = properGlyphs[i];
// uint codepoint = properGlyphs[i].codepoint;
// if (codepoint == 0)
// {
// break;
// }
// if (codepoint == 1173 && i > 1)
// {
// //check prev code point
// codepoint = 1168;
// }
// TextureFontGlyphData glyphData;
// if (!fontAtlas.GetRect((int)codepoint, out glyphData))
// {
// //Rectangle r = glyphData.Rect;
// //float x_min = glyphData.BBoxXMin / 64;
// ////draw each glyph at specific position
// ////_canvas.DrawSubImageWithMsdf(glBmp, ref r, c_x + x_min, (float)(baseline + r.Height));
// //_canvas.DrawSubImageWithMsdf(glBmp, ref r, c_x + x_min, (float)(baseline + r.Height));
// ////c_x += r.Width - 10;
// //c_x += (glyphData.AdvanceX / 64);
// continue;
// }
// //-------------------------------------------------------------
// //FontGlyph glyph = this.currentFont.GetGlyphByIndex(codepoint);
// FontGlyph glyph = currentFont.GetGlyphByIndex(codepoint);
// int left = (glyph.glyphMatrix.img_horiBearingX >> 6);
// Rectangle r = glyphData.Rect;
// int adjustX = 0;
// int bboxYMin = glyph.glyphMatrix.bboxYmin >> 6;
// if (bboxYMin > 1 || bboxYMin < -1)
// {
// // adjustX = 3;
// }
// //scale down 0.8;
// _canvas.DrawSubImageWithMsdf(glBmp, ref r, adjustX + c_x + left,
// (float)(baseline + ((int)(glyphData.ImgHeight + glyph.glyphMatrix.bboxYmin) >> 6)), 1.1f);
// int w = (glyph.glyphMatrix.advanceX) >> 6;
// c_x += (w);
// }
//}
// public override void DrawString(string text, double x, double y)
// {
// ////in this version we draw string to image
// ////and the write the image back to gl surface
// //_winGfx.Clear(System.Drawing.Color.White);
// //_winGfx.DrawString(text, _winFont, _winGfxBrush, 0, 0);
// ////_winGfxBackBmp.Save("d:\\WImageTest\\a00123.png");
// //System.Drawing.SizeF textAreaSize = _winGfx.MeasureString(text, _winFont);
// //var bmpData = _winGfxBackBmp.LockBits(new System.Drawing.Rectangle(0, 0, _winGfxBackBmp.Width, _winGfxBackBmp.Height), System.Drawing.Imaging.ImageLockMode.ReadOnly, _winGfxBackBmp.PixelFormat);
// //int width = (int)textAreaSize.Width;
// //int height = (int)textAreaSize.Height;
// //ActualImage actualImg = new ActualImage(width, height, Agg.Image.PixelFormat.ARGB32);
// ////------------------------------------------------------
// ////copy bmp from specific bmp area
// ////and convert to GLBmp
// //int stride = bmpData.Stride;
// //byte[] buffer = actualImg.GetBuffer();
// //unsafe
// //{
// // byte* header = (byte*)bmpData.Scan0;
// // fixed (byte* dest0 = &buffer[0])
// // {
// // byte* dest = dest0;
// // byte* rowHead = header;
// // int rowLen = width * 4;
// // for (int h = 0; h < height; ++h)
// // {
// // header = rowHead;
// // for (int n = 0; n < rowLen;)
// // {
// // //move next
// // *(dest + 0) = *(header + 0);
// // *(dest + 1) = *(header + 1);
// // *(dest + 2) = *(header + 2);
// // *(dest + 3) = *(header + 3);
// // header += 4;
// // dest += 4;
// // n += 4;
// // }
// // //finish one row
// // rowHead += stride;
// // }
// // }
// //}
// //_winGfxBackBmp.UnlockBits(bmpData);
// ////------------------------------------------------------
// //GLBitmap glBmp = new GLBitmap(width, height, buffer, false);
// //_canvas.DrawImageWithWhiteTransparent(glBmp, (float)x, (float)y);
// //glBmp.Dispose();
// }
}