void BuildOutlineGlyph(NativeFontGlyph fontGlyph, int pxsize)
{
NativeFontGlyphBuilder.BuildGlyphOutline(fontGlyph);
Agg.VertexStore vxs = new Agg.VertexStore();
NativeFontGlyphBuilder.FlattenVxs(fontGlyph.originalVxs, vxs);
fontGlyph.flattenVxs = vxs;
}
//internal NativeFont GetFontAtPixelSize(int pixelSize)
//{
// NativeFont found;
// if (!fonts.TryGetValue(pixelSize, out found))
// {
// //----------------------------------
// //set current fontface size
// currentFacePixelSize = pixelSize;
// NativeMyFontsLib.MyFtSetPixelSizes(this.ftFaceHandle, pixelSize);
// //create font size
// NativeFont f = new NativeFont(this, this.name, FontStyle.Regular, pixelSize);
// fonts.Add(pixelSize, f);
// //------------------------------------
// return f;
// }
// return found;
//}
//internal NativeFont GetFontAtPointSize(float fontPointSize)
//{
// //convert from point size to pixelsize ***
// NativeFont nativeFont = GetFontAtPixelSize((int)RequestFont.ConvEmSizeInPointsToPixels(fontPointSize));
// return nativeFont;
//}
internal FontGlyph ReloadGlyphFromIndex(uint glyphIndex, int pixelSize)
{
if (currentFacePixelSize != pixelSize)
{
currentFacePixelSize = pixelSize;
NativeMyFontsLib.MyFtSetPixelSizes(this.ftFaceHandle, pixelSize);
}
//--------------------------------------------------
var fontGlyph = new NativeFontGlyph();
NativeGlyphMatrix nativeGlyphMatrix;
NativeMyFontsLib.MyFtLoadGlyph(ftFaceHandle, glyphIndex, out nativeGlyphMatrix);
fontGlyph.glyphMatrix = nativeGlyphMatrix.matrixData;
BuildOutlineGlyph(fontGlyph, pixelSize);
return(fontGlyph);
}
internal FontGlyph ReloadGlyphFromChar(char unicodeChar, int pixelSize)
{
if (currentFacePixelSize != pixelSize)
{
currentFacePixelSize = pixelSize;
NativeMyFontsLib.MyFtSetPixelSizes(this.ftFaceHandle, pixelSize);
}
//--------------------------------------------------
var fontGlyph = new NativeFontGlyph();
NativeGlyphMatrix nativeGlyphMatrix;
NativeMyFontsLib.MyFtLoadChar(ftFaceHandle, unicodeChar, out nativeGlyphMatrix);
fontGlyph.glyphMatrix = nativeGlyphMatrix.matrixData;
fontGlyph.nativeBmpPtr = nativeGlyphMatrix.bitmap;
fontGlyph.nativeOutlinePtr = nativeGlyphMatrix.outline;
//--------------------------------------------------
BuildOutlineGlyph(fontGlyph, pixelSize);
return(fontGlyph);
}
void BuildBitmapGlyph(NativeFontGlyph fontGlyph, int pxsize)
{
NativeFontGlyphBuilder.CopyGlyphBitmap(fontGlyph);
}
const double FT_RESIZE = 64; //essential to be floating point
internal unsafe static GlyphImage BuildMsdfFontImage(NativeFontGlyph fontGlyph)
{
IntPtr shape = MyFtLib.CreateShape();
FT_Outline outline = (*(FT_Outline *)fontGlyph.nativeOutlinePtr); //outline version
//------------------------------
int npoints = outline.n_points;
List <PixelFarm.VectorMath.Vector2> points = new List <PixelFarm.VectorMath.Vector2>(npoints);
int startContour = 0;
int cpoint_index = 0;
int todoContourCount = outline.n_contours;
int controlPointCount = 0;
while (todoContourCount > 0)
{
int nextContour = outline.contours[startContour] + 1;
bool isFirstPoint = true;
//---------------
//create contour
IntPtr cnt = MyFtLib.ShapeAddBlankContour(shape);
FtVec2 secondControlPoint = new FtVec2();
FtVec2 thirdControlPoint = new FtVec2();
bool justFromCurveMode = false;
FtVec2 lastMoveTo = new FtVec2();
FtVec2 lastPoint = new FtVec2();
FtVec2 current_point = new Fonts.FtVec2();
for (; cpoint_index < nextContour; ++cpoint_index)
{
FT_Vector xvpoint = outline.points[cpoint_index];
current_point = new FtVec2(xvpoint.x / FT_RESIZE, xvpoint.y / FT_RESIZE);
//Console.WriteLine(xvpoint.x.ToString() + "," + xvpoint.y);
byte vtag = outline.tags[cpoint_index];
bool has_dropout = (((vtag >> 2) & 0x1) != 0);
int dropoutMode = vtag >> 3;
if ((vtag & 0x1) != 0)
{
if (justFromCurveMode)
{
switch (controlPointCount)
{
case 1:
{
MyFtLib.ContourAddQuadraticSegment(cnt,
lastPoint.x, lastPoint.y,
secondControlPoint.x, secondControlPoint.y,
current_point.x, current_point.y);
lastPoint = current_point;
}
break;
case 2:
{
MyFtLib.ContourAddCubicSegment(cnt,
lastPoint.x, lastPoint.y,
secondControlPoint.x, secondControlPoint.y,
thirdControlPoint.x, thirdControlPoint.y,
current_point.x, current_point.y);
lastPoint = current_point;
}
break;
default:
{
throw new NotSupportedException();
}
}
controlPointCount = 0;
justFromCurveMode = false;
}
else
{
//line mode
if (isFirstPoint)
{
isFirstPoint = false;
lastMoveTo = lastPoint = current_point;
}
else
{
MyFtLib.ContourAddLinearSegment(cnt,
lastPoint.x, lastPoint.y,
current_point.x, current_point.y);
lastPoint = current_point;
}
}
}
else
{
if (isFirstPoint)
{
isFirstPoint = false;
lastMoveTo = lastPoint = current_point;
}
switch (controlPointCount)
{
case 0:
{ //bit 1 set=> off curve, this is a control point
//if this is a 2nd order or 3rd order control point
if (((vtag >> 1) & 0x1) != 0)
{
////printf("[%d] bzc3rd, x: %d,y:%d \n", mm, vpoint.x, vpoint.y);
thirdControlPoint = new FtVec2(current_point.x, current_point.y);
}
else
{
////printf("[%d] bzc2nd, x: %d,y:%d \n", mm, vpoint.x, vpoint.y);
secondControlPoint = new FtVec2(current_point.x, current_point.y);
}
}
break;
case 1:
{
if (((vtag >> 1) & 0x1) != 0)
{
////printf("[%d] bzc3rd, x: %d,y:%d \n", mm, vpoint.x, vpoint.y);
thirdControlPoint = new FtVec2(current_point.x, current_point.y);
}
else
{
//we already have prev second control point
//so auto calculate line to
//between 2 point
FtVec2 mid = GetMidPoint(secondControlPoint, current_point);
MyFtLib.ContourAddQuadraticSegment(cnt,
lastPoint.x, lastPoint.y,
secondControlPoint.x, secondControlPoint.y,
mid.x, mid.y);
lastPoint = mid;
//------------------------
controlPointCount--;
//------------------------
//printf("[%d] bzc2nd, x: %d,y:%d \n", mm, vpoint.x, vpoint.y);
secondControlPoint = current_point;
}
}
break;
default:
{
throw new NotSupportedException();
}
}
controlPointCount++;
justFromCurveMode = true;
}
}
//--------
//close figure
//if in curve mode
if (justFromCurveMode)
{
switch (controlPointCount)
{
case 0: break;
case 1:
{
MyFtLib.ContourAddQuadraticSegment(cnt,
lastPoint.x, lastPoint.y,
secondControlPoint.x, secondControlPoint.y,
lastMoveTo.x, lastMoveTo.y);
lastPoint = current_point;
}
break;
case 2:
{
MyFtLib.ContourAddCubicSegment(cnt,
lastPoint.x, lastPoint.y,
secondControlPoint.x, secondControlPoint.y,
thirdControlPoint.x, thirdControlPoint.y,
lastMoveTo.x, lastMoveTo.y);
lastPoint = current_point;
}
break;
default:
{ throw new NotSupportedException(); }
}
justFromCurveMode = false;
controlPointCount = 0;
}
else
{
MyFtLib.ContourAddLinearSegment(cnt,
current_point.x, current_point.y,
lastMoveTo.x, lastMoveTo.y);
lastPoint = current_point;
}
//ps.CloseFigure();
//--------
startContour++;
todoContourCount--;
}
//------------
double s_left, s_bottom, s_right, s_top;
MyFtLib.ShapeFindBounds(shape, out s_left, out s_bottom, out s_right, out s_top);
RectangleF glyphBounds = new RectangleF((float)s_left, (float)s_top, (float)(s_right - s_left), (float)(s_top - s_bottom));
//then create msdf texture
if (!MyFtLib.ShapeValidate(shape))
{
throw new NotSupportedException();
}
MyFtLib.ShapeNormalize(shape);
int borderXY = 0;
int w = (int)Math.Ceiling(glyphBounds.Width) + (borderXY + borderXY);
int h = (int)(Math.Ceiling(glyphBounds.Height)) + (borderXY + borderXY);
if (w == 0)
{
w = 5;
h = 5;
}
int[] outputBuffer = new int[w * h];
GlyphImage glyphImage = new GlyphImage(w, h);
glyphImage.BorderXY = borderXY;
glyphImage.OriginalGlyphBounds = Typography.Rendering.RectangleF.FromLTRB(
glyphBounds.Left,
glyphBounds.Top,
glyphBounds.Right,
glyphBounds.Bottom);
unsafe
{
fixed(int *output_header = &outputBuffer[0])
{
float dx = 0;
float dy = 0;
if (s_left < 0)
{
//make it positive
dx = (float)-s_left;
}
else if (s_left > 0)
{
}
if (s_bottom < 0)
{
//make it positive
dy = (float)-s_bottom;
}
else if (s_bottom > 0)
{
}
//this glyph image has border (for msdf to render correctly)
MyFtLib.MyFtGenerateMsdf(shape, w, h, 4, 1, dx + borderXY, dy + borderXY, -1, 3, output_header);
MyFtLib.DeleteUnmanagedObj(shape);
}
glyphImage.SetImageBuffer(outputBuffer, true);
}
return(glyphImage);
}
unsafe internal static void CopyGlyphBitmap(NativeFontGlyph fontGlyph)
{
FT_Bitmap *ftBmp = (FT_Bitmap *)fontGlyph.nativeBmpPtr;
//image is 8 bits grayscale
int h = ftBmp->rows;
int w = ftBmp->width;
int stride = ftBmp->pitch;
int size = stride * h;
//copy it to array
//bmp glyph is bottom up
//so .. invert it...
byte[] buff = new byte[size];
//------------------------------------------------
byte *currentSrc = ftBmp->buffer;
int srcpos = size;
int targetpos = 0;
for (int r = 1; r <= h; ++r)
{
srcpos -= stride;
currentSrc = ftBmp->buffer + srcpos;
for (int c = 0; c < stride; ++c)
{
buff[targetpos] = *(currentSrc + c);
targetpos++;
}
}
////------------------------------------------------
//IntPtr bmpPtr = (IntPtr)ftBmp->buffer;
//Marshal.Copy((IntPtr)ftBmp->buffer, buff, 0, size);
////------------------------------------------------
//------------------------------------------------
fontGlyph.glyImgBuffer8 = buff;
//convert to 32bpp
//make gray value as alpha channel color value
ActualImage actualImage = new ActualImage(w, h, Agg.PixelFormat.ARGB32);
byte[] newBmp32Buffer = ActualImage.GetBuffer(actualImage);
int src_p = 0;
int target_p = 0;
for (int r = 0; r < h; ++r)
{
for (int c = 0; c < w; ++c)
{
byte srcColor = buff[src_p + c];
//expand to 4 channel
newBmp32Buffer[target_p] = 0;
newBmp32Buffer[target_p + 1] = 0;
newBmp32Buffer[target_p + 2] = 0;
newBmp32Buffer[target_p + 3] = srcColor; //A
target_p += 4;
}
src_p += stride;
}
fontGlyph.glyphImage32 = actualImage;
}
unsafe internal static void BuildGlyphOutline(NativeFontGlyph fontGlyph)
{
FT_Outline outline = (*(FT_Outline *)fontGlyph.nativeOutlinePtr);
//outline version
//------------------------------
int npoints = outline.n_points;
int startContour = 0;
int cpoint_index = 0;
int todoContourCount = outline.n_contours;
PixelFarm.Agg.VertexSource.PathWriter ps = new Agg.VertexSource.PathWriter();
fontGlyph.originalVxs = ps.Vxs;
int controlPointCount = 0;
while (todoContourCount > 0)
{
int nextContour = outline.contours[startContour] + 1;
bool isFirstPoint = true;
FtVec2 secondControlPoint = new FtVec2();
FtVec2 thirdControlPoint = new FtVec2();
bool justFromCurveMode = false;
//FT_Vector vpoint = new FT_Vector();
for (; cpoint_index < nextContour; ++cpoint_index)
{
FT_Vector vpoint = outline.points[cpoint_index];
byte vtag = outline.tags[cpoint_index];
bool has_dropout = (((vtag >> 2) & 0x1) != 0);
int dropoutMode = vtag >> 3;
// Console.WriteLine(vpoint.ToString() + " " + vtag);
if ((vtag & 0x1) != 0)
{
//on curve
if (justFromCurveMode)
{
switch (controlPointCount)
{
case 1:
{
ps.Curve3(secondControlPoint.x / FT_RESIZE, secondControlPoint.y / FT_RESIZE,
vpoint.x / FT_RESIZE, vpoint.y / FT_RESIZE);
}
break;
case 2:
{
ps.Curve4(secondControlPoint.x / FT_RESIZE, secondControlPoint.y / FT_RESIZE,
thirdControlPoint.x / FT_RESIZE, thirdControlPoint.y / FT_RESIZE,
vpoint.x / FT_RESIZE, vpoint.y / FT_RESIZE);
}
break;
default:
{
throw new NotSupportedException();
}
}
controlPointCount = 0;
justFromCurveMode = false;
}
else
{
if (isFirstPoint)
{
isFirstPoint = false;
ps.MoveTo(vpoint.x / FT_RESIZE, vpoint.y / FT_RESIZE);
}
else
{
ps.LineTo(vpoint.x / FT_RESIZE, vpoint.y / FT_RESIZE);
}
if (has_dropout)
{
//printf("[%d] on,dropoutMode=%d: %d,y:%d \n", mm, dropoutMode, vpoint.x, vpoint.y);
}
else
{
//printf("[%d] on,x: %d,y:%d \n", mm, vpoint.x, vpoint.y);
}
}
}
else
{
switch (controlPointCount)
{
case 0:
{ //bit 1 set=> off curve, this is a control point
//if this is a 2nd order or 3rd order control point
if (((vtag >> 1) & 0x1) != 0)
{
//printf("[%d] bzc3rd, x: %d,y:%d \n", mm, vpoint.x, vpoint.y);
thirdControlPoint = new FtVec2(vpoint);
}
else
{
//printf("[%d] bzc2nd, x: %d,y:%d \n", mm, vpoint.x, vpoint.y);
secondControlPoint = new FtVec2(vpoint);
}
}
break;
case 1:
{
if (((vtag >> 1) & 0x1) != 0)
{
//printf("[%d] bzc3rd, x: %d,y:%d \n", mm, vpoint.x, vpoint.y);
thirdControlPoint = new FtVec2(vpoint);
}
else
{
//we already have prev second control point
//so auto calculate line to
//between 2 point
FtVec2 mid = GetMidPoint(secondControlPoint, vpoint);
//----------
//generate curve3
ps.Curve3(secondControlPoint.x / FT_RESIZE, secondControlPoint.y / FT_RESIZE,
mid.x / FT_RESIZE, mid.y / FT_RESIZE);
//------------------------
controlPointCount--;
//------------------------
//printf("[%d] bzc2nd, x: %d,y:%d \n", mm, vpoint.x, vpoint.y);
secondControlPoint = new FtVec2(vpoint);
}
}
break;
default:
{
throw new NotSupportedException();
}
break;
}
controlPointCount++;
justFromCurveMode = true;
}
}
//--------
//close figure
//if in curve mode
if (justFromCurveMode)
{
switch (controlPointCount)
{
case 0: break;
case 1:
{
ps.Curve3(secondControlPoint.x / FT_RESIZE, secondControlPoint.y / FT_RESIZE,
ps.LastMoveX, ps.LastMoveY);
}
break;
case 2:
{
ps.Curve4(secondControlPoint.x / FT_RESIZE, secondControlPoint.y / FT_RESIZE,
thirdControlPoint.x / FT_RESIZE, thirdControlPoint.y / FT_RESIZE,
ps.LastMoveX, ps.LastMoveY);
}
break;
default:
{ throw new NotSupportedException(); }
}
justFromCurveMode = false;
controlPointCount = 0;
}
ps.CloseFigure();
//--------
startContour++;
todoContourCount--;
}
}
