void
Tk_DrawChars(
Display *display, /* Display on which to draw. */
Drawable drawable, /* Window or pixmap in which to draw. */
GC gc, /* Graphics context for drawing characters. */
Tk_Font tkfont, /* Font in which characters will be drawn;
* must be the same as font used in GC. */
CONST char *source, /* UTF-8 string to be displayed. Need not be
* '\0' terminated. All Tk meta-characters
* (tabs, control characters, and newlines)
* should be stripped out of the string that
* is passed to this function. If they are not
* stripped out, they will be displayed as
* regular printing characters. */
int numBytes, /* Number of bytes in string. */
int x, int y) /* Coordinates at which to place origin of
* string when drawing. */
{
const int maxCoord = 0x7FFF;/* Xft coordinates are 16 bit values */
UnixFtFont *fontPtr = (UnixFtFont *) tkfont;
XGCValues values;
XColor xcolor;
int clen, nspec;
XftGlyphFontSpec specs[NUM_SPEC];
XGlyphInfo metrics;
if (fontPtr->ftDraw == 0) {
#if DEBUG_FONTSEL
printf("Switch to drawable 0x%x\n", drawable);
#endif /* DEBUG_FONTSEL */
fontPtr->ftDraw = XftDrawCreate(display, drawable,
DefaultVisual(display, fontPtr->screen),
DefaultColormap(display, fontPtr->screen));
} else {
Tk_ErrorHandler handler = Tk_CreateErrorHandler(display, -1, -1, -1,
NULL, (ClientData) NULL);
XftDrawChange(fontPtr->ftDraw, drawable);
Tk_DeleteErrorHandler(handler);
}
XGetGCValues(display, gc, GCForeground, &values);
if (values.foreground != fontPtr->color.pixel) {
xcolor.pixel = values.foreground;
XQueryColor(display, DefaultColormap(display, fontPtr->screen),
&xcolor);
fontPtr->color.color.red = xcolor.red;
fontPtr->color.color.green = xcolor.green;
fontPtr->color.color.blue = xcolor.blue;
fontPtr->color.color.alpha = 0xffff;
fontPtr->color.pixel = values.foreground;
}
nspec = 0;
while (numBytes > 0 && x <= maxCoord && y <= maxCoord) {
XftFont *ftFont;
FcChar32 c;
clen = FcUtf8ToUcs4((FcChar8 *) source, &c, numBytes);
if (clen <= 0) {
/*
* This should not happen, but it can.
*/
return;
}
source += clen;
numBytes -= clen;
ftFont = GetFont(fontPtr, c);
if (ftFont) {
specs[nspec].font = ftFont;
specs[nspec].glyph = XftCharIndex(fontPtr->display, ftFont, c);
specs[nspec].x = x;
specs[nspec].y = y;
XftGlyphExtents(fontPtr->display, ftFont, &specs[nspec].glyph, 1,
&metrics);
x += metrics.xOff;
y += metrics.yOff;
nspec++;
if (nspec == NUM_SPEC) {
XftDrawGlyphFontSpec(fontPtr->ftDraw, &fontPtr->color,
specs, nspec);
nspec = 0;
}
}
}
if (nspec) {
XftDrawGlyphFontSpec(fontPtr->ftDraw, &fontPtr->color, specs, nspec);
}
}
void
TkDrawAngledChars(
Display *display, /* Display on which to draw. */
Drawable drawable, /* Window or pixmap in which to draw. */
GC gc, /* Graphics context for drawing characters. */
Tk_Font tkfont, /* Font in which characters will be drawn;
* must be the same as font used in GC. */
const char *source, /* UTF-8 string to be displayed. Need not be
* '\0' terminated. All Tk meta-characters
* (tabs, control characters, and newlines)
* should be stripped out of the string that
* is passed to this function. If they are not
* stripped out, they will be displayed as
* regular printing characters. */
int numBytes, /* Number of bytes in string. */
double x, double y, /* Coordinates at which to place origin of
* string when drawing. */
double angle) /* What angle to put text at, in degrees. */
{
const int maxCoord = 0x7FFF;/* Xft coordinates are 16 bit values */
const int minCoord = -1000; /* Should be good enough... */
UnixFtFont *fontPtr = (UnixFtFont *) tkfont;
XGCValues values;
XColor xcolor;
int xStart = x, yStart = y;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
#ifdef XFT_HAS_FIXED_ROTATED_PLACEMENT
int clen, nglyph;
FT_UInt glyphs[NUM_SPEC];
XGlyphInfo metrics;
XftFont *currentFtFont;
int originX, originY;
if (fontPtr->ftDraw == 0) {
#if DEBUG_FONTSEL
printf("Switch to drawable 0x%x\n", drawable);
#endif /* DEBUG_FONTSEL */
fontPtr->ftDraw = XftDrawCreate(display, drawable,
DefaultVisual(display, fontPtr->screen),
DefaultColormap(display, fontPtr->screen));
} else {
Tk_ErrorHandler handler =
Tk_CreateErrorHandler(display, -1, -1, -1, NULL, NULL);
XftDrawChange(fontPtr->ftDraw, drawable);
Tk_DeleteErrorHandler(handler);
}
XGetGCValues(display, gc, GCForeground, &values);
if (values.foreground != fontPtr->color.pixel) {
xcolor.pixel = values.foreground;
XQueryColor(display, DefaultColormap(display, fontPtr->screen),
&xcolor);
fontPtr->color.color.red = xcolor.red;
fontPtr->color.color.green = xcolor.green;
fontPtr->color.color.blue = xcolor.blue;
fontPtr->color.color.alpha = 0xffff;
fontPtr->color.pixel = values.foreground;
}
if (tsdPtr->clipRegion != None) {
XftDrawSetClip(fontPtr->ftDraw, tsdPtr->clipRegion);
}
nglyph = 0;
currentFtFont = NULL;
originX = originY = 0; /* lint */
while (numBytes > 0 && x <= maxCoord && x >= minCoord && y <= maxCoord
&& y >= minCoord) {
XftFont *ftFont;
FcChar32 c;
clen = FcUtf8ToUcs4((FcChar8 *) source, &c, numBytes);
if (clen <= 0) {
/*
* This should not happen, but it can.
*/
goto doUnderlineStrikeout;
}
source += clen;
numBytes -= clen;
ftFont = GetFont(fontPtr, c, angle);
if (!ftFont) {
continue;
}
if (ftFont != currentFtFont || nglyph == NUM_SPEC) {
if (nglyph) {
/*
* We pass multiple glyphs at once to enable the code to
* perform better rendering of sub-pixel inter-glyph spacing.
* If only the current Xft implementation could make use of
* this information... but we'll be ready when it does!
*/
XftDrawGlyphs(fontPtr->ftDraw, &fontPtr->color, currentFtFont,
originX, originY, glyphs, nglyph);
}
originX = ROUND16(x);
originY = ROUND16(y);
if (nglyph) {
XftGlyphExtents(fontPtr->display, currentFtFont, glyphs,
nglyph, &metrics);
nglyph = 0;
x += metrics.xOff;
y += metrics.yOff;
}
currentFtFont = ftFont;
}
glyphs[nglyph++] = XftCharIndex(fontPtr->display, ftFont, c);
}
if (nglyph) {
XftDrawGlyphs(fontPtr->ftDraw, &fontPtr->color, currentFtFont,
originX, originY, glyphs, nglyph);
}
#else /* !XFT_HAS_FIXED_ROTATED_PLACEMENT */
int clen, nspec;
XftGlyphFontSpec specs[NUM_SPEC];
XGlyphInfo metrics;
double sinA = sin(angle * PI/180.0), cosA = cos(angle * PI/180.0);
if (fontPtr->ftDraw == 0) {
#if DEBUG_FONTSEL
printf("Switch to drawable 0x%x\n", drawable);
#endif /* DEBUG_FONTSEL */
fontPtr->ftDraw = XftDrawCreate(display, drawable,
DefaultVisual(display, fontPtr->screen),
DefaultColormap(display, fontPtr->screen));
} else {
Tk_ErrorHandler handler =
Tk_CreateErrorHandler(display, -1, -1, -1, NULL, NULL);
XftDrawChange(fontPtr->ftDraw, drawable);
Tk_DeleteErrorHandler(handler);
}
XGetGCValues(display, gc, GCForeground, &values);
if (values.foreground != fontPtr->color.pixel) {
xcolor.pixel = values.foreground;
XQueryColor(display, DefaultColormap(display, fontPtr->screen),
&xcolor);
fontPtr->color.color.red = xcolor.red;
fontPtr->color.color.green = xcolor.green;
fontPtr->color.color.blue = xcolor.blue;
fontPtr->color.color.alpha = 0xffff;
fontPtr->color.pixel = values.foreground;
}
if (tsdPtr->clipRegion != None) {
XftDrawSetClip(fontPtr->ftDraw, tsdPtr->clipRegion);
}
nspec = 0;
while (numBytes > 0 && x <= maxCoord && x >= minCoord
&& y <= maxCoord && y >= minCoord) {
XftFont *ftFont, *ft0Font;
FcChar32 c;
clen = FcUtf8ToUcs4((FcChar8 *) source, &c, numBytes);
if (clen <= 0) {
/*
* This should not happen, but it can.
*/
goto doUnderlineStrikeout;
}
source += clen;
numBytes -= clen;
ftFont = GetFont(fontPtr, c, angle);
ft0Font = GetFont(fontPtr, c, 0.0);
if (ftFont && ft0Font) {
specs[nspec].font = ftFont;
specs[nspec].glyph = XftCharIndex(fontPtr->display, ftFont, c);
specs[nspec].x = ROUND16(x);
specs[nspec].y = ROUND16(y);
XftGlyphExtents(fontPtr->display, ft0Font, &specs[nspec].glyph, 1,
&metrics);
x += metrics.xOff*cosA + metrics.yOff*sinA;
y += metrics.yOff*cosA - metrics.xOff*sinA;
nspec++;
if (nspec == NUM_SPEC) {
XftDrawGlyphFontSpec(fontPtr->ftDraw, &fontPtr->color,
specs, nspec);
nspec = 0;
}
}
}
if (nspec) {
XftDrawGlyphFontSpec(fontPtr->ftDraw, &fontPtr->color, specs, nspec);
}
#endif /* XFT_HAS_FIXED_ROTATED_PLACEMENT */
doUnderlineStrikeout:
if (tsdPtr->clipRegion != None) {
XftDrawSetClip(fontPtr->ftDraw, None);
}
if (fontPtr->font.fa.underline || fontPtr->font.fa.overstrike) {
XPoint points[5];
double width = (x - xStart) * cosA + (yStart - y) * sinA;
double barHeight = fontPtr->font.underlineHeight;
double dy = fontPtr->font.underlinePos;
if (fontPtr->font.fa.underline != 0) {
if (fontPtr->font.underlineHeight == 1) {
dy++;
}
points[0].x = xStart + ROUND16(dy*sinA);
points[0].y = yStart + ROUND16(dy*cosA);
points[1].x = xStart + ROUND16(dy*sinA + width*cosA);
points[1].y = yStart + ROUND16(dy*cosA - width*sinA);
if (fontPtr->font.underlineHeight == 1) {
XDrawLines(display, drawable, gc, points, 2, CoordModeOrigin);
} else {
points[2].x = xStart + ROUND16(dy*sinA + width*cosA
+ barHeight*sinA);
points[2].y = yStart + ROUND16(dy*cosA - width*sinA
+ barHeight*cosA);
points[3].x = xStart + ROUND16(dy*sinA + barHeight*sinA);
points[3].y = yStart + ROUND16(dy*cosA + barHeight*cosA);
points[4].x = points[0].x;
points[4].y = points[0].y;
XFillPolygon(display, drawable, gc, points, 5, Complex,
CoordModeOrigin);
XDrawLines(display, drawable, gc, points, 5, CoordModeOrigin);
}
}
if (fontPtr->font.fa.overstrike != 0) {
dy = -fontPtr->font.fm.descent
- (fontPtr->font.fm.ascent) / 10;
points[0].x = xStart + ROUND16(dy*sinA);
points[0].y = yStart + ROUND16(dy*cosA);
points[1].x = xStart + ROUND16(dy*sinA + width*cosA);
points[1].y = yStart + ROUND16(dy*cosA - width*sinA);
if (fontPtr->font.underlineHeight == 1) {
XDrawLines(display, drawable, gc, points, 2, CoordModeOrigin);
} else {
points[2].x = xStart + ROUND16(dy*sinA + width*cosA
+ barHeight*sinA);
points[2].y = yStart + ROUND16(dy*cosA - width*sinA
+ barHeight*cosA);
points[3].x = xStart + ROUND16(dy*sinA + barHeight*sinA);
points[3].y = yStart + ROUND16(dy*cosA + barHeight*cosA);
points[4].x = points[0].x;
points[4].y = points[0].y;
XFillPolygon(display, drawable, gc, points, 5, Complex,
CoordModeOrigin);
XDrawLines(display, drawable, gc, points, 5, CoordModeOrigin);
}
}
}
}
