public static int DrawString(this WriteableBitmap bmp, int x0, int y0, IntRect cliprect, Color fontColor, PortableFontDesc typeface, string text)
{
var font = GetFont(typeface);
return(bmp.DrawString(x0, y0, cliprect, fontColor, font, text));
}
public static unsafe void DrawLetterVertical(this BitmapContext context, int x0, int y0, IntRect cliprect, Color fontColor, GrayScaleLetterGlyph glyph, Boolean topToBottom)
{
if (glyph.Items == null)
{
return;
}
// Use refs for faster access (really important!) speeds up a lot!
int w = context.Width;
int h = context.Height;
var pixels = context.Pixels;
int fr = fontColor.R;
int fg = fontColor.G;
int fb = fontColor.B;
int xmin = cliprect.Left;
int ymin = cliprect.Top;
int xmax = cliprect.Right;
int ymax = cliprect.Bottom;
if (xmin < 0)
{
xmin = 0;
}
if (ymin < 0)
{
ymin = 0;
}
if (xmax >= w)
{
xmax = w - 1;
}
if (ymax >= h)
{
ymax = h - 1;
fixed(GrayScaleLetterGlyph.Item *items = glyph.Items)
{
int itemCount = glyph.Items.Length;
GrayScaleLetterGlyph.Item *currentItem = items;
for (int i = 0; i < itemCount; i++, currentItem++)
{
int x;
int y;
if (topToBottom)
{
x = x0 - currentItem->Y;
y = y0 + currentItem->X;
}
else
{
x = x0 + currentItem->Y;
y = y0 - currentItem->X;
}
int alpha = currentItem->Alpha;
if (x < xmin || y < ymin || x > xmax || y > ymax)
{
continue;
}
int color = pixels[y * w + x];
int r = ((color >> 16) & 0xFF);
int g = ((color >> 8) & 0xFF);
int b = ((color) & 0xFF);
r = (((r << 12) + (fr - r) * alpha) >> 12) & 0xFF;
g = (((g << 12) + (fg - g) * alpha) >> 12) & 0xFF;
b = (((b << 12) + (fb - b) * alpha) >> 12) & 0xFF;
pixels[y * w + x] = (0xFF << 24) | (r << 16) | (g << 8) | (b);
}
}
}
public static unsafe void DrawLetter(this BitmapContext context, int x0, int y0, IntRect cliprect, ClearTypeLetterGlyph glyph)
{
//if (glyph.Instructions == null) return;
if (glyph.Items == null)
{
return;
}
// Use refs for faster access (really important!) speeds up a lot!
int w = context.Width;
int h = context.Height;
var pixels = context.Pixels;
int xmin = cliprect.Left;
int ymin = cliprect.Top;
int xmax = cliprect.Right;
int ymax = cliprect.Bottom;
if (xmin < 0)
{
xmin = 0;
}
if (ymin < 0)
{
ymin = 0;
}
if (xmax >= w)
{
xmax = w - 1;
}
if (ymax >= h)
{
ymax = h - 1;
fixed(ClearTypeLetterGlyph.Item *items = glyph.Items)
{
int itemCount = glyph.Items.Length;
ClearTypeLetterGlyph.Item *currentItem = items;
for (int i = 0; i < itemCount; i++, currentItem++)
{
int x = x0 + currentItem->X;
int y = y0 + currentItem->Y;
int color = currentItem->Color;
if (x < xmin || y < ymin || x > xmax || y > ymax)
{
continue;
}
pixels[y * w + x] = color;
}
}
}
public static int DrawString(this WriteableBitmap bmp, int x0, int y0, IntRect cliprect, Color fontColor, GlyphFont font, string text)
{
return(DrawString(bmp, x0, y0, cliprect, fontColor, null, font, text));
}
public static unsafe void DrawLetter(this BitmapContext context, int x0, int y0, IntRect cliprect, ClearTypeLetterGlyph glyph)
{
// if (glyph.Instructions == null) return;
if (glyph.Items == null)
{
return;
}
// Use refs for faster access (really important!) speeds up a lot!
int w = context.Width;
int h = context.Height;
var pixels = context.Pixels;
int xmin = cliprect.Left;
int ymin = cliprect.Top;
int xmax = cliprect.Right;
int ymax = cliprect.Bottom;
if (xmin < 0)
{
xmin = 0;
}
if (ymin < 0)
{
ymin = 0;
}
if (xmax >= w)
{
xmax = w - 1;
}
if (ymax >= h)
{
ymax = h - 1;
}
fixed(ClearTypeLetterGlyph.Item *items = glyph.Items)
{
int itemCount = glyph.Items.Length;
ClearTypeLetterGlyph.Item *currentItem = items;
// if (x0 >= xmin && y0 >= ymin && x0 + glyph.Width < xmax && y0 + glyph.Height < ymax)
// {
// for (int i = 0; i < itemCount; i++, currentItem++)
// {
// pixels[(y0 + currentItem->Y) * w + x0 + currentItem->X] = currentItem->Color;
// }
// }
// else
// {
for (int i = 0; i < itemCount; i++, currentItem++)
{
int x = x0 + currentItem->X;
int y = y0 + currentItem->Y;
int color = currentItem->Color;
if (x < xmin || y < ymin || x > xmax || y > ymax)
{
continue;
}
pixels[(y * w) + x] = color;
}
// }
}
// fixed (int *instructions = glyph.Instructions)
// {
// int* current = instructions;
// while (*current != -1)
// {
// int dy = *current++;
// int dx = *current++;
// int count0 = *current++;
// int y = y0 + dy;
// if (y >= ymin && y <= ymax)
// {
// int x = x0 + dx;
// int* dst = pixels + y*w + x;
// int* src = current;
// int count = count0;
// if (x < xmin)
// {
// int dmin = xmin - x;
// x += dmin;
// dst += dmin;
// src += dmin;
// count -= dmin;
// }
// if (x + count - 1 > xmax)
// {
// int dmax = x + count - 1 - xmax;
// count -= dmax;
// }
// if (count > 0)
// {
// NativeMethods.memcpy(dst, src, count * 4);
// //if (count < 10)
// //{
// // while (count > 0)
// // {
// // *dst++ = *src++;
// // count--;
// // }
// //}
// //else
// //{
// // NativeMethods.memcpy(dst, src, count*4);
// //}
// }
// }
// current += count0;
// }
// }
}
public static int DrawString(this WriteableBitmap bmp, int x0, int y0, IntRect cliprect, Color fontColor, Color?bgColor, GlyphFont font, string text)
{
if (text == null)
{
return(0);
}
int dx = 0, dy = 0;
int textwi = 0;
using (var context = bmp.GetBitmapContext())
{
foreach (char ch in text)
{
if (ch == '\n')
{
if (dx > textwi)
{
textwi = dx;
}
dx = 0;
dy += font.TextHeight;
}
if (x0 + dx <= cliprect.Right)
{
if (font.IsClearType)
{
if (!bgColor.HasValue)
{
throw new Exception("Clear type fonts must have background specified");
}
var letter = font.GetClearTypeLetter(ch, fontColor, bgColor.Value);
if (letter == null)
{
continue;
}
context.DrawLetter(x0 + dx, y0 + dy, cliprect, letter);
dx += letter.Width;
}
else
{
var letter = font.GetGrayScaleLetter(ch);
if (letter == null)
{
continue;
}
context.DrawLetter(x0 + dx, y0 + dy, cliprect, fontColor, letter);
dx += letter.Width;
}
}
}
}
if (dx > textwi)
{
textwi = dx;
}
return(textwi);
}
/// <summary>
/// scrolls content of given rectangle
/// </summary>
/// <param name="bmp"></param>
/// <param name="dy">if greater than 0, scrolls down, else scrolls up</param>
/// <param name="rect"></param>
public static unsafe void ScrollY(this WriteableBitmap bmp, int dy, IntRect rect, Color?background = null)
{
int bgcolor = WriteableBitmapExtensions.ConvertColor(background ?? Colors.White);
using (var context = bmp.GetBitmapContext())
{
// Use refs for faster access (really important!) speeds up a lot!
int w = context.Width;
int h = context.Height;
var pixels = context.Pixels;
int xmin = rect.Left;
int ymin = rect.Top;
int xmax = rect.Right;
int ymax = rect.Bottom;
if (xmin < 0)
{
xmin = 0;
}
if (ymin < 0)
{
ymin = 0;
}
if (xmax >= w)
{
xmax = w - 1;
}
if (ymax >= h)
{
ymax = h - 1;
}
int xcnt = xmax - xmin + 1;
int ycnt = ymax - ymin + 1;
if (xcnt <= 0)
{
return;
}
if (dy > 0)
{
for (int y = ymax; y >= ymin + dy; y--)
{
int ydstidex = y;
int ysrcindex = y - dy;
if (ysrcindex < ymin || ysrcindex > ymax)
{
continue;
}
NativeMethods.memcpy(pixels + (ydstidex * w) + xmin, pixels + (ysrcindex * w) + xmin, xcnt * 4);
}
}
if (dy < 0)
{
for (int y = ymin; y <= ymax - dy; y++)
{
int ysrcindex = y - dy;
int ydstidex = y;
if (ysrcindex < ymin || ysrcindex > ymax)
{
continue;
}
NativeMethods.memcpy(pixels + (ydstidex * w) + xmin, pixels + (ysrcindex * w) + xmin, xcnt * 4);
}
}
if (dy < 0)
{
bmp.FillRectangle(xmin, ymax + dy + 1, xmax, ymax, bgcolor);
}
if (dy > 0)
{
bmp.FillRectangle(xmin, ymin, xmax, ymin + dy - 1, bgcolor);
}
}
}
/// <summary>
/// scrolls content of given rectangle
/// </summary>
/// <param name="bmp"></param>
/// <param name="dx">if greater than 0, scrolls right, else scrolls left</param>
/// <param name="rect"></param>
public static unsafe void ScrollX(this WriteableBitmap bmp, int dx, IntRect rect, Color?background = null)
{
int bgcolor = WriteableBitmapExtensions.ConvertColor(background ?? Colors.White);
using (var context = bmp.GetBitmapContext())
{
// Use refs for faster access (really important!) speeds up a lot!
int w = context.Width;
int h = context.Height;
var pixels = context.Pixels;
int xmin = rect.Left;
int ymin = rect.Top;
int xmax = rect.Right;
int ymax = rect.Bottom;
if (xmin < 0)
{
xmin = 0;
}
if (ymin < 0)
{
ymin = 0;
}
if (xmax >= w)
{
xmax = w - 1;
}
if (ymax >= h)
{
ymax = h - 1;
}
int xcnt = xmax - xmin + 1;
int ycnt = ymax - ymin + 1;
int srcx = xmin, dstx = xmin;
if (dx < 0)
{
xcnt += dx;
dstx = xmin;
srcx = xmin - dx;
}
if (dx > 0)
{
xcnt -= dx;
srcx = xmin;
dstx = xmin + dx;
}
if (xcnt <= 0)
{
return;
}
int *yptr = pixels + (w * ymin);
for (int y = ymin; y <= ymax; y++, yptr += w)
{
NativeMethods.memcpy(yptr + dstx, yptr + srcx, xcnt * 4);
}
if (dx < 0)
{
bmp.FillRectangle(xmax + dx + 1, ymin, xmax, ymax, bgcolor);
}
if (dx > 0)
{
bmp.FillRectangle(xmin, ymin, xmin + dx - 1, ymax, bgcolor);
}
}
}
public static void DrawRectangle(this WriteableBitmap bmp, IntRect rect, Color color)
{
var col = ConvertColor(color);
bmp.DrawRectangle(rect.Left, rect.Top, rect.Right, rect.Bottom, col);
}
