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IABSD.fr/xenocara/lib/libXft/src/xftextent.c
matthieu
- lib/libXft/src/xftextent.c
-
/* * Copyright © 2000 Keith Packard * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the name of Keith Packard not be used in * advertising or publicity pertaining to distribution of the software without * specific, written prior permission. Keith Packard makes no * representations about the suitability of this software for any purpose. It * is provided "as is" without express or implied warranty. * * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ #include "xftint.h" _X_EXPORT void XftGlyphExtents (Display *dpy, XftFont *pub, _Xconst FT_UInt *glyphs, int nglyphs, XGlyphInfo *extents) { XftFontInt *font = (XftFontInt *) pub; FT_UInt missing[XFT_NMISSING]; int nmissing; int n; _Xconst FT_UInt *g; FT_UInt glyph; XftGlyph *xftg; FcBool glyphs_loaded; int x, y; int left, right, top, bottom; int overall_left, overall_right; int overall_top, overall_bottom; g = glyphs; n = nglyphs; nmissing = 0; glyphs_loaded = FcFalse; while (n--) if (XftFontCheckGlyph (dpy, pub, FcFalse, *g++, missing, &nmissing)) glyphs_loaded = FcTrue; if (nmissing) XftFontLoadGlyphs (dpy, pub, FcFalse, missing, nmissing); g = glyphs; n = nglyphs; xftg = NULL; while (n) { glyph = *g++; n--; if (glyph < font->num_glyphs && (xftg = font->glyphs[glyph])) break; } if (n == 0) { if (xftg) *extents = xftg->metrics; else memset (extents, '\0', sizeof (*extents)); } else { x = 0; y = 0; overall_left = x - xftg->metrics.x; overall_top = y - xftg->metrics.y; overall_right = overall_left + (int) xftg->metrics.width; overall_bottom = overall_top + (int) xftg->metrics.height; x += xftg->metrics.xOff; y += xftg->metrics.yOff; while (n--) { glyph = *g++; if (glyph < font->num_glyphs && (xftg = font->glyphs[glyph])) { left = x - xftg->metrics.x; top = y - xftg->metrics.y; right = left + (int) xftg->metrics.width; bottom = top + (int) xftg->metrics.height; if (left < overall_left) overall_left = left; if (top < overall_top) overall_top = top; if (right > overall_right) overall_right = right; if (bottom > overall_bottom) overall_bottom = bottom; x += xftg->metrics.xOff; y += xftg->metrics.yOff; } } extents->x = -overall_left; extents->y = -overall_top; extents->width = overall_right - overall_left; extents->height = overall_bottom - overall_top; extents->xOff = x; extents->yOff = y; } if (glyphs_loaded) _XftFontManageMemory (dpy, pub); } #define NUM_LOCAL 1024 _X_EXPORT void XftTextExtents8 (Display *dpy, XftFont *pub, _Xconst FcChar8 *string, int len, XGlyphInfo *extents) { FT_UInt *glyphs, glyphs_local[NUM_LOCAL]; int i; if (len <= NUM_LOCAL) glyphs = glyphs_local; else { glyphs = malloc (len * sizeof (FT_UInt)); if (!glyphs) { memset (extents, '\0', sizeof (XGlyphInfo)); return; } } for (i = 0; i < len; i++) glyphs[i] = XftCharIndex (dpy, pub, string[i]); XftGlyphExtents (dpy, pub, glyphs, len, extents); if (glyphs != glyphs_local) free (glyphs); } _X_EXPORT void XftTextExtents16 (Display *dpy, XftFont *pub, _Xconst FcChar16 *string, int len, XGlyphInfo *extents) { FT_UInt *glyphs, glyphs_local[NUM_LOCAL]; int i; if (len <= NUM_LOCAL) glyphs = glyphs_local; else { glyphs = malloc (len * sizeof (FT_UInt)); if (!glyphs) { memset (extents, '\0', sizeof (XGlyphInfo)); return; } } for (i = 0; i < len; i++) glyphs[i] = XftCharIndex (dpy, pub, string[i]); XftGlyphExtents (dpy, pub, glyphs, len, extents); if (glyphs != glyphs_local) free (glyphs); } _X_EXPORT void XftTextExtents32 (Display *dpy, XftFont *pub, _Xconst FcChar32 *string, int len, XGlyphInfo *extents) { FT_UInt *glyphs, glyphs_local[NUM_LOCAL]; int i; if (len <= NUM_LOCAL) glyphs = glyphs_local; else { glyphs = malloc (len * sizeof (FT_UInt)); if (!glyphs) { memset (extents, '\0', sizeof (XGlyphInfo)); return; } } for (i = 0; i < len; i++) glyphs[i] = XftCharIndex (dpy, pub, string[i]); XftGlyphExtents (dpy, pub, glyphs, len, extents); if (glyphs != glyphs_local) free (glyphs); } _X_EXPORT void XftTextExtentsUtf8 (Display *dpy, XftFont *pub, _Xconst FcChar8 *string, int len, XGlyphInfo *extents) { FT_UInt *glyphs, *glyphs_new, glyphs_local[NUM_LOCAL]; FcChar32 ucs4; int i; int l; int size; i = 0; glyphs = glyphs_local; size = NUM_LOCAL; while (len && (l = FcUtf8ToUcs4 (string, &ucs4, len)) > 0) { if (i == size) { glyphs_new = malloc (size * 2 * sizeof (FT_UInt)); if (!glyphs_new) { if (glyphs != glyphs_local) free (glyphs); memset (extents, '\0', sizeof (XGlyphInfo)); return; } memcpy (glyphs_new, glyphs, size * sizeof (FT_UInt)); size *= 2; if (glyphs != glyphs_local) free (glyphs); glyphs = glyphs_new; } glyphs[i++] = XftCharIndex (dpy, pub, ucs4); string += l; len -= l; } XftGlyphExtents (dpy, pub, glyphs, i, extents); if (glyphs != glyphs_local) free (glyphs); } _X_EXPORT void XftTextExtentsUtf16 (Display *dpy, XftFont *pub, _Xconst FcChar8 *string, FcEndian endian, int len, XGlyphInfo *extents) { FT_UInt *glyphs, *glyphs_new, glyphs_local[NUM_LOCAL]; FcChar32 ucs4; int i; int l; int size; i = 0; glyphs = glyphs_local; size = NUM_LOCAL; while (len && (l = FcUtf16ToUcs4 (string, endian, &ucs4, len)) > 0) { if (i == size) { glyphs_new = malloc (size * 2 * sizeof (FT_UInt)); if (!glyphs_new) { if (glyphs != glyphs_local) free (glyphs); memset (extents, '\0', sizeof (XGlyphInfo)); return; } memcpy (glyphs_new, glyphs, size * sizeof (FT_UInt)); size *= 2; if (glyphs != glyphs_local) free (glyphs); glyphs = glyphs_new; } glyphs[i++] = XftCharIndex (dpy, pub, ucs4); string += l; len -= l; } XftGlyphExtents (dpy, pub, glyphs, i, extents); if (glyphs != glyphs_local) free (glyphs); }