public void DrawString(Painter p, char[] buffer, int startAt, int len, double x, double y)
{
//if (_stencilBmp == null)
//{
// //create a stencil bmp
// _stencilBmp = new ActualBitmap(p.Width, p.Height);
// _stencilBlender = new PixelProcessing.SubBitmapBlender(_stencilBmp, new PixelProcessing.PixelBlenderBGRA());
// _backPainter = AggPainter.Create(_stencilBmp);
// //------
//}
int j = buffer.Length;
//create temp buffer span that describe the part of a whole char buffer
var textBufferSpan = new Typography.Text.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 = _txtClient.CreateGlyphPlanSeq(textBufferSpan, _font);
ResolvedFont resolvedFont = _textServices.ResolveFont(_font);
Typeface typeface = resolvedFont.Typeface;
float scale = typeface.CalculateScaleToPixelFromPointSize(_font.SizeInPoints);
int recommendLineSpacing = resolvedFont.LineSpacingInPixels;
//--------------------------
//TODO:
//if (x,y) is left top
//we need to adjust y again
y -= resolvedFont.LineSpacingInPixels;
//
float scaleFromTexture = _finalTextureScale;
TextureKind textureKind = _fontAtlas.TextureKind;
float g_x = 0;
float g_y = 0;
int baseY = (int)Math.Round(y);
//-------------------------------------
//load texture
//_pcx.LoadTexture1(_glBmp);
//-------------------------------------
float acc_x = 0;
float acc_y = 0;
p.DrawImage(_fontBmp, 100, 100);
int seqLen = glyphPlanSeq.Count;
for (int i = 0; i < seqLen; ++i)
{
UnscaledGlyphPlan glyph = glyphPlanSeq[i];
AtlasItem glyphData;
if (!_fontAtlas.TryGetItem(glyph.glyphIndex, out glyphData))
{
//if no glyph data, we should render a missing glyph ***
continue;
}
//--------------------------------------
//TODO: review precise height in float
//--------------------------------------
int srcX, srcY, srcW, srcH;
glyphData.GetRect(out srcX, out srcY, out srcW, out srcH);
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 + srcH) * scaleFromTexture);
acc_x += (float)Math.Round(glyph.AdvanceX * scale);
//g_x = (float)Math.Round(g_x);
g_y = (float)Math.Floor(g_y);
p.DrawImage(_fontBmp, g_x, g_y, srcX, srcY, srcW, srcH);
}
//-------
//we create vbo first
//then render
}
public void DrawString(Painter p, char[] buffer, int startAt, int len, double x, double y)
{
if (!(p is AggPainter painter))
{
return;
}
//
int width = painter.Width;
int height = painter.Height;
if (!_pixelBlenderSetup)
{
SetupMaskPixelBlender(width, height);
_pixelBlenderSetup = true;
}
int j = buffer.Length;
//create temp buffer span that describe the part of a whole char buffer
var textBufferSpan = new Typography.Text.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
ResolvedFont font = _textServices.ResolveFont(_font);
GlyphPlanSequence glyphPlanSeq = _txtClient.CreateGlyphPlanSeq(textBufferSpan, _font);
float scale = 1;// _fontAtlas.TargetTextureScale;
int recommendLineSpacing = (int)font.LineSpacingInPixels;
//--------------------------
//TODO:
//if (x,y) is left top
//we need to adjust y again
y -= font.LineSpacingInPixels;
//
float scaleFromTexture = _finalTextureScale;
TextureKind textureKind = _fontAtlas.TextureKind;
float gx = 0;
float gy = 0;
int baseY = (int)Math.Round(y);
float acc_x = 0;
float acc_y = 0;
int lineHeight = (int)font.LineSpacingInPixels;//temp
//painter.DestBitmapBlender.OutputPixelBlender = maskPixelBlenderPerCompo; //change to new blender
painter.DestBitmapBlender.OutputPixelBlender = _maskPixelBlenderPerCompo; //change to new blender
int seqLen = glyphPlanSeq.Count;
for (int i = 0; i < seqLen; ++i)
{
UnscaledGlyphPlan glyph = glyphPlanSeq[i];
if (!_fontAtlas.TryGetItem(glyph.glyphIndex, out AtlasItem atlaItem))
{
//if no glyph data, we should render a missing glyph ***
continue;
}
//--------------------------------------
//TODO: review precise height in float
//--------------------------------------
atlaItem.GetRect(out int srcX, out int srcY, out int srcW, out int srcH);
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
//--------------------------
gx = (float)(x + (ngx - atlaItem.TextureXOffset) * scaleFromTexture); //ideal x
gy = (float)(y + (ngy - atlaItem.TextureYOffset - srcH + lineHeight) * scaleFromTexture);
acc_x += (float)Math.Round(glyph.AdvanceX * scale);
gy = (float)Math.Floor(gy) + lineHeight;
//clear with solid black color
//_maskBufferPainter.Clear(Color.Black);
_maskBufferPainter.FillRect(gx - 1, gy - 1, srcW + 2, srcH + 2, Color.Black);
//draw 'stencil' glyph on mask-buffer
//_maskBufferPainter.DrawImage(_fontBmp, gx, gy, srcX, _fontBmp.Height - (srcY), srcW, srcH);
_maskBufferPainter.DrawImage(_fontBmp, gx, gy, srcX, srcY, srcW, srcH);
//select component to render this need to render 3 times for lcd technique
//1. B
_maskPixelBlenderPerCompo.SelectedMaskComponent = PixelBlenderColorComponent.B;
_maskPixelBlenderPerCompo.EnableOutputColorComponent = EnableOutputColorComponent.B;
painter.FillRect(gx + 1, gy, srcW, srcH);
//2. G
_maskPixelBlenderPerCompo.SelectedMaskComponent = PixelBlenderColorComponent.G;
_maskPixelBlenderPerCompo.EnableOutputColorComponent = EnableOutputColorComponent.G;
painter.FillRect(gx + 1, gy, srcW, srcH);
//3. R
_maskPixelBlenderPerCompo.SelectedMaskComponent = PixelBlenderColorComponent.R;
_maskPixelBlenderPerCompo.EnableOutputColorComponent = EnableOutputColorComponent.R;
painter.FillRect(gx + 1, gy, srcW, srcH);
}
}