public void DrawString(RenderVxFormattedString renderVx, double x, double y)
{
RenderVxGlyphPlan[] glyphPlans = renderVx.glyphList;
int n = glyphPlans.Length;
EnsureLoadGLBmp();
//PERF:
//TODO: review here, can we cache the glbmp for later use
//not to create it every time
float scaleFromTexture = _finalTextureScale;
Typography.Rendering.TextureKind textureKind = simpleFontAtlas.TextureKind;
float g_x = 0;
float g_y = 0;
int baseY = (int)Math.Round(y);
float scale = 1;
for (int i = 0; i < n; ++i)
{
//PERF:
//TODO:
//render a set of glyph instead of one glyph per time ***
RenderVxGlyphPlan glyph = glyphPlans[i];
Typography.Rendering.TextureFontGlyphData glyphData;
if (!simpleFontAtlas.TryGetGlyphDataByCodePoint(glyph.glyphIndex, out glyphData))
{
continue;
}
//--------------------------------------
//TODO: review precise height in float
//--------------------------------------
PixelFarm.Drawing.Rectangle srcRect = ConvToRect(glyphData.Rect);
//--------------------------
GlyphPosPixelSnapKind x_snap = this.GlyphPosPixelSnapX;
GlyphPosPixelSnapKind y_snap = this.GlyphPosPixelSnapY;
switch (x_snap)
{
default: throw new NotSupportedException();
case GlyphPosPixelSnapKind.Integer:
{
g_x = (float)(x + (glyph.x * scale - glyphData.TextureXOffset) * scaleFromTexture); //ideal x
int floor_x = (int)g_x;
//round to int 0,1
if (g_x - floor_x >= (1f / 2f))
{
g_x = floor_x + 1;
}
else
{
g_x = floor_x;
}
}
break;
case GlyphPosPixelSnapKind.Half:
{
g_x = (float)(x + (glyph.x * scale - glyphData.TextureXOffset) * scaleFromTexture); //ideal x
//adjust
int floor_x = (int)g_x;
//round to int 0, 0.5,1.0
if (g_x - floor_x >= (2f / 3f))
{
g_x = floor_x + 1;
}
else if (g_x - floor_x >= (1f / 3f))
{
g_x = floor_x + 0.5f;
}
else
{
g_x = floor_x;
}
}
break;
case GlyphPosPixelSnapKind.None:
g_x = (float)(x + (glyph.x * scale - glyphData.TextureXOffset) * scaleFromTexture);
break;
}
//
switch (y_snap)
{
default: throw new NotSupportedException();
case GlyphPosPixelSnapKind.Integer:
//use baseY not y
{
g_y = (float)((glyph.y * scale - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture);
int floor_y = (int)g_y;
//round to int 0,1
if (g_y - floor_y >= (1f / 2f))
{
g_y = floor_y + 1;
}
else
{
g_y = floor_y;
}
g_y = baseY + g_y;
}
break;
case GlyphPosPixelSnapKind.Half:
//review here
//use baseY not y
{
g_y = (float)((glyph.y * scale - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture);
int floor_y = (int)g_y;
//round to int 0, 0.5,1.0
if (g_y - floor_y >= (2f / 3f))
{
g_y = floor_y + 1;
}
else if (g_x - floor_y >= (1f / 3f))
{
g_y = floor_y + 0.5f;
}
else
{
g_y = floor_y;
}
g_y = baseY + g_y;
}
break;
case GlyphPosPixelSnapKind.None:
//use Y not baseY
g_y = (float)(y + (glyph.y * scale - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture);
break;
}
switch (textureKind)
{
case Typography.Rendering.TextureKind.Msdf:
canvas2d.DrawSubImageWithMsdf(_glBmp,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
case Typography.Rendering.TextureKind.AggGrayScale:
canvas2d.DrawSubImage(_glBmp,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
case Typography.Rendering.TextureKind.AggSubPixel:
canvas2d.DrawGlyphImageWithSubPixelRenderingTechnique(_glBmp,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
}
//-----------
//backup
//switch (textureKind)
//{
// case Typography.Rendering.TextureKind.Msdf:
// {
// canvas2d.DrawSubImageWithMsdf(_glBmp,
// ref srcRect,
// (float)(x + (glyph.x - glyphData.TextureXOffset) * scaleFromTexture), // -glyphData.TextureXOffset => restore to original pos
// (float)(y + (glyph.y - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture),// -glyphData.TextureYOffset => restore to original pos
// scaleFromTexture);
// }
// break;
// case Typography.Rendering.TextureKind.AggGrayScale:
// {
// canvas2d.DrawSubImage(_glBmp,
// ref srcRect,
// (float)(x + (glyph.x - glyphData.TextureXOffset) * scaleFromTexture), // -glyphData.TextureXOffset => restore to original pos
// (float)(y + (glyph.y - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture),// -glyphData.TextureYOffset => restore to original pos
// scaleFromTexture);
// }
// break;
// case Typography.Rendering.TextureKind.AggSubPixel:
// canvas2d.DrawGlyphImageWithSubPixelRenderingTechnique(_glBmp,
// ref srcRect,
// (float)(x + (glyph.x - glyphData.TextureXOffset) * scaleFromTexture), // -glyphData.TextureXOffset => restore to original pos
// (float)(y + (glyph.y - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture),// -glyphData.TextureYOffset => restore to original pos
// scaleFromTexture);
// break;
//}
}
}
public void DrawString(char[] buffer, int startAt, int len, double x, double y)
{
int j = buffer.Length;
//resolve font from painter?
glyphPlans.Clear();
_glyphLayout.Layout(_typeface, buffer, startAt, len, glyphPlans);
float scale = _typeface.CalculateToPixelScaleFromPointSize(font.SizeInPoints);
//--------------------------
//TODO:
//if (x,y) is left top
//we need to adjust y again
y -= (_typeface.Ascender - _typeface.Descender + _typeface.LineGap) * scale;
int n = glyphPlans.Count;
EnsureLoadGLBmp();
//
float scaleFromTexture = _finalTextureScale;
Typography.Rendering.TextureKind textureKind = simpleFontAtlas.TextureKind;
//--------------------------
//TODO: review render steps
//NOTE:
// -glyphData.TextureXOffset => restore to original pos
// -glyphData.TextureYOffset => restore to original pos
// ideal_x = (float)(x + (glyph.x * scale - glyphData.TextureXOffset) * scaleFromTexture);
// ideal_y = (float)(y + (glyph.y * scale - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture);
//--------------------------
GlyphPosPixelSnapKind x_snap = this.GlyphPosPixelSnapX;
GlyphPosPixelSnapKind y_snap = this.GlyphPosPixelSnapY;
float g_x = 0;
float g_y = 0;
int baseY = (int)Math.Round(y);
for (int i = 0; i < n; ++i)
{
GlyphPlan glyph = glyphPlans[i];
Typography.Rendering.TextureFontGlyphData glyphData;
if (!simpleFontAtlas.TryGetGlyphDataByCodePoint(glyph.glyphIndex, out glyphData))
{
continue;
}
//--------------------------------------
//TODO: review precise height in float
//--------------------------------------
PixelFarm.Drawing.Rectangle srcRect = ConvToRect(glyphData.Rect);
switch (x_snap)
{
default: throw new NotSupportedException();
case GlyphPosPixelSnapKind.Integer:
{
g_x = (float)(x + (glyph.x * scale - glyphData.TextureXOffset) * scaleFromTexture); //ideal x
int floor_x = (int)g_x;
//round to int 0,1
if (g_x - floor_x >= (1f / 2f))
{
g_x = floor_x + 1;
}
else
{
g_x = floor_x;
}
}
break;
case GlyphPosPixelSnapKind.Half:
{
g_x = (float)(x + (glyph.x * scale - glyphData.TextureXOffset) * scaleFromTexture); //ideal x
//adjust
int floor_x = (int)g_x;
//round to int 0, 0.5,1.0
if (g_x - floor_x >= (2f / 3f))
{
g_x = floor_x + 1;
}
else if (g_x - floor_x >= (1f / 3f))
{
g_x = floor_x + 0.5f;
}
else
{
g_x = floor_x;
}
}
break;
case GlyphPosPixelSnapKind.None:
g_x = (float)(x + (glyph.x * scale - glyphData.TextureXOffset) * scaleFromTexture);
break;
}
//
switch (y_snap)
{
default: throw new NotSupportedException();
case GlyphPosPixelSnapKind.Integer:
//use baseY not y
{
g_y = (float)((glyph.y * scale - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture);
int floor_y = (int)g_y;
//round to int 0,1
if (g_y - floor_y >= (1f / 2f))
{
g_y = floor_y + 1;
}
else
{
g_y = floor_y;
}
g_y = baseY + g_y;
}
break;
case GlyphPosPixelSnapKind.Half:
//review here
//use baseY not y
{
g_y = (float)((glyph.y * scale - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture);
int floor_y = (int)g_y;
//round to int 0, 0.5,1.0
if (g_y - floor_y >= (2f / 3f))
{
g_y = floor_y + 1;
}
else if (g_x - floor_y >= (1f / 3f))
{
g_y = floor_y + 0.5f;
}
else
{
g_y = floor_y;
}
g_y = baseY + g_y;
}
break;
case GlyphPosPixelSnapKind.None:
//use Y not baseY
g_y = (float)(y + (glyph.y * scale - glyphData.TextureYOffset + srcRect.Height) * scaleFromTexture);
break;
}
switch (textureKind)
{
case Typography.Rendering.TextureKind.Msdf:
canvas2d.DrawSubImageWithMsdf(_glBmp,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
case Typography.Rendering.TextureKind.AggGrayScale:
canvas2d.DrawSubImage(_glBmp,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
case Typography.Rendering.TextureKind.AggSubPixel:
canvas2d.DrawGlyphImageWithSubPixelRenderingTechnique(_glBmp,
ref srcRect,
g_x,
g_y,
scaleFromTexture);
break;
}
}
}
