protected override void OnGLRender(object sender, EventArgs args)
{
_glsx.SmoothMode = SmoothMode.Smooth;
_glsx.StrokeColor = PixelFarm.Drawing.Color.Blue;
_glsx.ClearColorBuffer();
if (!resInit)
{
// msdf_bmp = LoadTexture(@"..\msdf_75.png");
//msdf_bmp = LoadTexture(@"d:\\WImageTest\\a001_x1_66.png");
msdf_bmp = DemoHelper.LoadTexture(totalImg);
//msdf_bmp = LoadTexture(@"d:\\WImageTest\\a001_x1.png");
//msdf_bmp = LoadTexture(@"d:\\WImageTest\\msdf_65.png");
resInit = true;
}
painter.Clear(PixelFarm.Drawing.Color.White);
//var f = painter.CurrentFont;
//painter.DrawString("hello!", 0, 20);
//canvas2d.DrawImageWithSubPixelRenderingMsdf(msdf_bmp, 200, 500, 15f);
Typography.Rendering.TextureFontGlyphData glyphData;
byte[] codepoint = System.Text.Encoding.UTF8.GetBytes("AB");
fontAtlas.TryGetGlyphDataByGlyphIndex(codepoint[0], out glyphData);
PixelFarm.Drawing.Rectangle r = ConvToRect(glyphData.Rect);
//canvas2d.DrawSubImageWithMsdf(msdf_bmp, ref r, 100, 500);
_glsx.DrawSubImageWithMsdf(msdf_bmp, ref r, 100, 500);
fontAtlas.TryGetGlyphDataByGlyphIndex(codepoint[1], out glyphData);
PixelFarm.Drawing.Rectangle r2 = ConvToRect(glyphData.Rect);
_glsx.DrawSubImageWithMsdf(msdf_bmp, ref r2, 100 + r.Width - 10, 500);
//full image
_glsx.DrawImage(msdf_bmp, 100, 300);
SwapBuffers();
}
public void DrawString(char[] buffer, int startAt, int len, double x, double y)
{
_glsx.FontFillColor = painter.FontFillColor;
int j = buffer.Length;
//create temp buffer span that describe the part of a whole char buffer
TextBufferSpan textBufferSpan = new TextBufferSpan(buffer, startAt, len);
//ask text service to parse user input char buffer and create a glyph-plan-sequence (list of glyph-plan)
//with specific request font
GlyphPlanSequence glyphPlanSeq = _textServices.CreateGlyphPlanSeq(ref textBufferSpan, font);
float scale = _fontAtlas.TargetTextureScale;
int recommendLineSpacing = _fontAtlas.OriginalRecommendLineSpacing;
//--------------------------
//TODO:
//if (x,y) is left top
//we need to adjust y again
y -= ((_fontAtlas.OriginalRecommendLineSpacing) * scale);
EnsureLoadGLBmp();
//
float scaleFromTexture = _finalTextureScale;
TextureKind textureKind = _fontAtlas.TextureKind;
float g_x = 0;
float g_y = 0;
int baseY = (int)Math.Round(y);
int n = glyphPlanSeq.len;
int endBefore = glyphPlanSeq.startAt + n;
//-------------------------------------
_glsx.LoadTexture1(_glBmp);
//-------------------------------------
_vboBufferList.Clear(); //clear before use
_indexList.Clear(); //clear before use
float acc_x = 0;
float acc_y = 0;
for (int i = glyphPlanSeq.startAt; i < endBefore; ++i)
{
UnscaledGlyphPlanList glyphPlanList = GlyphPlanSequence.UnsafeGetInteralGlyphPlanList(glyphPlanSeq);
UnscaledGlyphPlan glyph = glyphPlanList[i];
Typography.Rendering.TextureFontGlyphData glyphData;
if (!_fontAtlas.TryGetGlyphDataByGlyphIndex(glyph.glyphIndex, out glyphData))
{
//if no glyph data, we should render a missing glyph ***
continue;
}
//--------------------------------------
//TODO: review precise height in float
//--------------------------------------
PixelFarm.Drawing.Rectangle srcRect = ConvToRect(glyphData.Rect);
float ngx = acc_x + (float)Math.Round(glyph.OffsetX * scale);
float ngy = acc_y + (float)Math.Round(glyph.OffsetY * scale);
//NOTE:
// -glyphData.TextureXOffset => restore to original pos
// -glyphData.TextureYOffset => restore to original pos
//--------------------------
g_x = (float)(x + (ngx - glyphData.TextureXOffset) * scaleFromTexture); //ideal x
g_y = (float)(y + (ngy - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture);
acc_x += (float)Math.Round(glyph.AdvanceX * scale);
//g_x = (float)Math.Round(g_x);
g_y = (float)Math.Floor(g_y);
switch (textureKind)
{
case TextureKind.Msdf:
_glsx.DrawSubImageWithMsdf(_glBmp,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
case TextureKind.StencilGreyScale:
//stencil gray scale with fill-color
_glsx.DrawGlyphImageWithStecil(_glBmp,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
case TextureKind.Bitmap:
_glsx.DrawSubImage(_glBmp,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
case TextureKind.StencilLcdEffect:
_glsx.WriteVboToList(
_vboBufferList,
_indexList,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
}
}
//-------
//we create vbo first
//then render
_glsx.DrawGlyphImageWithSubPixelRenderingTechnique3(_vboBufferList.ToArray(), _indexList.ToArray());
}
