/*
* Copyright 2001 Computing Research Labs, New Mexico State University
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COMPUTING RESEARCH LAB OR NEW MEXICO STATE UNIVERSITY BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
* OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef lint
#ifdef __GNUC__
static char rcsid[] __attribute__ ((unused)) = "$Id: bdfgrid.c 1284 2004-04-02 07:42:44Z jameson $";
#else
static char rcsid[] = "$Id: bdfgrid.c 1284 2004-04-02 07:42:44Z jameson $";
#endif
#endif
#include "bdfP.h"
#ifndef MYABS
#define MYABS(n) ((n) < 0 ? -(n) : (n))
#endif
#undef MAX
#define MAX(h, i) ((h) > (i) ? (h) : (i))
#undef MIN
#define MIN(l, o) ((l) < (o) ? (l) : (o))
double _bdf_cos_tbl[360] = {
0.000000, 0.999848, 0.999391, 0.998630, 0.997564, 0.996195,
0.994522, 0.992546, 0.990268, 0.987688, 0.984808, 0.981627,
0.978148, 0.974370, 0.970296, 0.965926, 0.961262, 0.956305,
0.951057, 0.945519, 0.939693, 0.933580, 0.927184, 0.920505,
0.913545, 0.906308, 0.898794, 0.891007, 0.882948, 0.874620,
0.866025, 0.857167, 0.848048, 0.838671, 0.829038, 0.819152,
0.809017, 0.798636, 0.788011, 0.777146, 0.766044, 0.754710,
0.743145, 0.731354, 0.719340, 0.707107, 0.694658, 0.681998,
0.669131, 0.656059, 0.642788, 0.629320, 0.615661, 0.601815,
0.587785, 0.573576, 0.559193, 0.544639, 0.529919, 0.515038,
0.500000, 0.484810, 0.469472, 0.453990, 0.438371, 0.422618,
0.406737, 0.390731, 0.374607, 0.358368, 0.342020, 0.325568,
0.309017, 0.292372, 0.275637, 0.258819, 0.241922, 0.224951,
0.207912, 0.190809, 0.173648, 0.156434, 0.139173, 0.121869,
0.104528, 0.087156, 0.069756, 0.052336, 0.034899, 0.017452,
0.000000, -0.017452, -0.034899, -0.052336, -0.069756, -0.087156,
-0.104528, -0.121869, -0.139173, -0.156434, -0.173648, -0.190809,
-0.207912, -0.224951, -0.241922, -0.258819, -0.275637, -0.292372,
-0.309017, -0.325568, -0.342020, -0.358368, -0.374607, -0.390731,
-0.406737, -0.422618, -0.438371, -0.453990, -0.469472, -0.484810,
-0.500000, -0.515038, -0.529919, -0.544639, -0.559193, -0.573576,
-0.587785, -0.601815, -0.615661, -0.629320, -0.642788, -0.656059,
-0.669131, -0.681998, -0.694658, -0.707107, -0.719340, -0.731354,
-0.743145, -0.754710, -0.766044, -0.777146, -0.788011, -0.798636,
-0.809017, -0.819152, -0.829038, -0.838671, -0.848048, -0.857167,
-0.866025, -0.874620, -0.882948, -0.891007, -0.898794, -0.906308,
-0.913545, -0.920505, -0.927184, -0.933580, -0.939693, -0.945519,
-0.951057, -0.956305, -0.961262, -0.965926, -0.970296, -0.974370,
-0.978148, -0.981627, -0.984808, -0.987688, -0.990268, -0.992546,
-0.994522, -0.996195, -0.997564, -0.998630, -0.999391, -0.999848,
-1.000000, -0.999848, -0.999391, -0.998630, -0.997564, -0.996195,
-0.994522, -0.992546, -0.990268, -0.987688, -0.984808, -0.981627,
-0.978148, -0.974370, -0.970296, -0.965926, -0.961262, -0.956305,
-0.951057, -0.945519, -0.939693, -0.933580, -0.927184, -0.920505,
-0.913545, -0.906308, -0.898794, -0.891007, -0.882948, -0.874620,
-0.866025, -0.857167, -0.848048, -0.838671, -0.829038, -0.819152,
-0.809017, -0.798636, -0.788011, -0.777146, -0.766044, -0.754710,
-0.743145, -0.731354, -0.719340, -0.707107, -0.694658, -0.681998,
-0.669131, -0.656059, -0.642788, -0.629320, -0.615661, -0.601815,
-0.587785, -0.573576, -0.559193, -0.544639, -0.529919, -0.515038,
-0.500000, -0.484810, -0.469472, -0.453990, -0.438371, -0.422618,
-0.406737, -0.390731, -0.374607, -0.358368, -0.342020, -0.325568,
-0.309017, -0.292372, -0.275637, -0.258819, -0.241922, -0.224951,
-0.207912, -0.190809, -0.173648, -0.156434, -0.139173, -0.121869,
-0.104528, -0.087156, -0.069756, -0.052336, -0.034899, -0.017452,
-0.000000, 0.017452, 0.034899, 0.052336, 0.069756, 0.087156,
0.104528, 0.121869, 0.139173, 0.156434, 0.173648, 0.190809,
0.207912, 0.224951, 0.241922, 0.258819, 0.275637, 0.292372,
0.309017, 0.325568, 0.342020, 0.358368, 0.374607, 0.390731,
0.406737, 0.422618, 0.438371, 0.453990, 0.469472, 0.484810,
0.500000, 0.515038, 0.529919, 0.544639, 0.559193, 0.573576,
0.587785, 0.601815, 0.615661, 0.629320, 0.642788, 0.656059,
0.669131, 0.681998, 0.694658, 0.707107, 0.719340, 0.731354,
0.743145, 0.754710, 0.766044, 0.777146, 0.788011, 0.798636,
0.809017, 0.819152, 0.829038, 0.838671, 0.848048, 0.857167,
0.866025, 0.874620, 0.882948, 0.891007, 0.898794, 0.906308,
0.913545, 0.920505, 0.927184, 0.933580, 0.939693, 0.945519,
0.951057, 0.956305, 0.961262, 0.965926, 0.970296, 0.974370,
0.978148, 0.981627, 0.984808, 0.987688, 0.990268, 0.992546,
0.994522, 0.996195, 0.997564, 0.998630, 0.999391, 0.999848,
};
double _bdf_sin_tbl[360] = {
0.000000, 0.017452, 0.034899, 0.052336, 0.069756, 0.087156,
0.104528, 0.121869, 0.139173, 0.156434, 0.173648, 0.190809,
0.207912, 0.224951, 0.241922, 0.258819, 0.275637, 0.292372,
0.309017, 0.325568, 0.342020, 0.358368, 0.374607, 0.390731,
0.406737, 0.422618, 0.438371, 0.453990, 0.469472, 0.484810,
0.500000, 0.515038, 0.529919, 0.544639, 0.559193, 0.573576,
0.587785, 0.601815, 0.615661, 0.629320, 0.642788, 0.656059,
0.669131, 0.681998, 0.694658, 0.707107, 0.719340, 0.731354,
0.743145, 0.754710, 0.766044, 0.777146, 0.788011, 0.798636,
0.809017, 0.819152, 0.829038, 0.838671, 0.848048, 0.857167,
0.866025, 0.874620, 0.882948, 0.891007, 0.898794, 0.906308,
0.913545, 0.920505, 0.927184, 0.933580, 0.939693, 0.945519,
0.951057, 0.956305, 0.961262, 0.965926, 0.970296, 0.974370,
0.978148, 0.981627, 0.984808, 0.987688, 0.990268, 0.992546,
0.994522, 0.996195, 0.997564, 0.998630, 0.999391, 0.999848,
1.000000, 0.999848, 0.999391, 0.998630, 0.997564, 0.996195,
0.994522, 0.992546, 0.990268, 0.987688, 0.984808, 0.981627,
0.978148, 0.974370, 0.970296, 0.965926, 0.961262, 0.956305,
0.951057, 0.945519, 0.939693, 0.933580, 0.927184, 0.920505,
0.913545, 0.906308, 0.898794, 0.891007, 0.882948, 0.874620,
0.866025, 0.857167, 0.848048, 0.838671, 0.829038, 0.819152,
0.809017, 0.798636, 0.788011, 0.777146, 0.766044, 0.754710,
0.743145, 0.731354, 0.719340, 0.707107, 0.694658, 0.681998,
0.669131, 0.656059, 0.642788, 0.629320, 0.615661, 0.601815,
0.587785, 0.573576, 0.559193, 0.544639, 0.529919, 0.515038,
0.500000, 0.484810, 0.469472, 0.453990, 0.438371, 0.422618,
0.406737, 0.390731, 0.374607, 0.358368, 0.342020, 0.325568,
0.309017, 0.292372, 0.275637, 0.258819, 0.241922, 0.224951,
0.207912, 0.190809, 0.173648, 0.156434, 0.139173, 0.121869,
0.104528, 0.087156, 0.069756, 0.052336, 0.034899, 0.017452,
0.000000, -0.017452, -0.034899, -0.052336, -0.069756, -0.087156,
-0.104528, -0.121869, -0.139173, -0.156434, -0.173648, -0.190809,
-0.207912, -0.224951, -0.241922, -0.258819, -0.275637, -0.292372,
-0.309017, -0.325568, -0.342020, -0.358368, -0.374607, -0.390731,
-0.406737, -0.422618, -0.438371, -0.453990, -0.469472, -0.484810,
-0.500000, -0.515038, -0.529919, -0.544639, -0.559193, -0.573576,
-0.587785, -0.601815, -0.615661, -0.629320, -0.642788, -0.656059,
-0.669131, -0.681998, -0.694658, -0.707107, -0.719340, -0.731354,
-0.743145, -0.754710, -0.766044, -0.777146, -0.788011, -0.798636,
-0.809017, -0.819152, -0.829038, -0.838671, -0.848048, -0.857167,
-0.866025, -0.874620, -0.882948, -0.891007, -0.898794, -0.906308,
-0.913545, -0.920505, -0.927184, -0.933580, -0.939693, -0.945519,
-0.951057, -0.956305, -0.961262, -0.965926, -0.970296, -0.974370,
-0.978148, -0.981627, -0.984808, -0.987688, -0.990268, -0.992546,
-0.994522, -0.996195, -0.997564, -0.998630, -0.999391, -0.999848,
-1.000000, -0.999848, -0.999391, -0.998630, -0.997564, -0.996195,
-0.994522, -0.992546, -0.990268, -0.987688, -0.984808, -0.981627,
-0.978148, -0.974370, -0.970296, -0.965926, -0.961262, -0.956305,
-0.951057, -0.945519, -0.939693, -0.933580, -0.927184, -0.920505,
-0.913545, -0.906308, -0.898794, -0.891007, -0.882948, -0.874620,
-0.866025, -0.857167, -0.848048, -0.838671, -0.829038, -0.819152,
-0.809017, -0.798636, -0.788011, -0.777146, -0.766044, -0.754710,
-0.743145, -0.731354, -0.719340, -0.707107, -0.694658, -0.681998,
-0.669131, -0.656059, -0.642788, -0.629320, -0.615661, -0.601815,
-0.587785, -0.573576, -0.559193, -0.544639, -0.529919, -0.515038,
-0.500000, -0.484810, -0.469472, -0.453990, -0.438371, -0.422618,
-0.406737, -0.390731, -0.374607, -0.358368, -0.342020, -0.325568,
-0.309017, -0.292372, -0.275637, -0.258819, -0.241922, -0.224951,
-0.207912, -0.190809, -0.173648, -0.156434, -0.139173, -0.121869,
-0.104528, -0.087156, -0.069756, -0.052336, -0.034899, -0.017452,
};
double _bdf_tan_tbl[90] = {
0.000000, 0.017455, 0.034921, 0.052408, 0.069927, 0.087489,
0.105104, 0.122785, 0.140541, 0.158384, 0.176327, 0.194380,
0.212557, 0.230868, 0.249328, 0.267949, 0.286745, 0.305731,
0.324920, 0.344328, 0.363970, 0.383864, 0.404026, 0.424475,
0.445229, 0.466308, 0.487733, 0.509525, 0.531709, 0.554309,
0.577350, 0.600861, 0.624869, 0.649408, 0.674509, 0.700208,
0.726543, 0.753554, 0.781286, 0.809784, 0.839100, 0.869287,
0.900404, 0.932515, 0.965689, 1.000000, 1.035530, 1.072369,
1.110613, 1.150368, 1.191754, 1.234897, 1.279942, 1.327045,
1.376382, 1.428148, 1.482561, 1.539865, 1.600335, 1.664279,
1.732051, 1.804048, 1.880726, 1.962611, 2.050304, 2.144507,
2.246037, 2.355852, 2.475087, 2.605089, 2.747477, 2.904211,
3.077684, 3.270853, 3.487414, 3.732051, 4.010781, 4.331476,
4.704630, 5.144554, 5.671282, 6.313752, 7.115370, 8.144346,
9.514364, 11.430052, 14.300666, 19.081137, 28.636253, 57.289962,
};
/*
* Determine the actual ink bounds.
*/
static int
#ifdef __STDC__
_bdf_grid_ink_bounds(bdf_glyph_grid_t *grid, short *x, short *y,
short *width, short *height)
#else
_bdf_grid_ink_bounds(grid, x, y, width, height)
bdf_glyph_grid_t *grid;
short *x, *y, *width, *height;
#endif
{
short bx, by, bwd, bht, minx, maxx, miny, maxy, dx, dy;
unsigned short bpr, ink, sel, col;
unsigned char *bmap, *masks;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
if (grid->sel.width != 0 && grid->sel.height != 0) {
sel = 1;
bx = by = 0;
bwd = grid->sel.width;
bht = grid->sel.height;
bmap = grid->sel.bitmap;
} else {
sel = 0;
bx = grid->glyph_x;
by = grid->glyph_y;
bwd = grid->glyph_bbx.width;
bht = grid->glyph_bbx.height;
bmap = grid->bitmap;
}
maxx = maxy = 0;
minx = bx + bwd;
miny = by + bht;
bpr = ((bwd * grid->bpp) + 7) >> 3;
ink = 0;
bwd += bx;
bht += by;
for (dy = by; dy < bht; dy++) {
for (col = bx * grid->bpp, dx = bx; dx < bwd; dx++, col += grid->bpp) {
if (bmap[(dy * bpr) + (col >> 3)] & masks[(col & 7) / grid->bpp]) {
ink = 1;
minx = MIN(minx, dx);
miny = MIN(miny, dy);
maxx = MAX(maxx, dx);
maxy = MAX(maxy, dy);
}
}
}
*x = minx + ((sel) ? grid->sel.x : 0);
*y = miny + ((sel) ? grid->sel.y : 0);
if (ink == 0)
*width = *height = 0;
else {
*width = (maxx - minx) + 1;
*height = (maxy - miny) + 1;
}
return ink;
}
/**************************************************************************
*
* Glyph grid create and destroy functions.
*
**************************************************************************/
/*
* Make a glyph grid with the glyph bitmap set in the bitmap.
*/
bdf_glyph_grid_t *
#ifdef __STDC__
bdf_make_glyph_grid(bdf_font_t *font, long code, int unencoded)
#else
bdf_make_glyph_grid(font, code, unencoded)
bdf_font_t *font;
long code;
int unencoded;
#endif
{
unsigned short si, di, col, colx, byte;
short ht, as, ds, gsize, bpr, x, y, nx, ny;
long l, r, m;
bdf_glyph_grid_t *gr;
bdf_glyph_t *gl, *glp;
bdf_property_t *p;
unsigned char *masks;
char name[24];
if (font == 0)
return 0;
/*
* Allocate the grid and initialize it.
*/
gr = (bdf_glyph_grid_t *) malloc(sizeof(bdf_glyph_grid_t));
(void) memset((char *) gr, 0, sizeof(bdf_glyph_grid_t));
/*
* Set the encoding and the unencoded flag.
*/
gr->bpp = font->bpp;
gr->encoding = code;
gr->unencoded = unencoded;
/*
* Set the glyph grid spacing.
*/
gr->spacing = font->spacing;
/*
* Set the point size and resolutions.
*/
gr->point_size = font->point_size;
gr->resolution_x = font->resolution_x;
gr->resolution_y = font->resolution_y;
/*
* Set the CAP_HEIGHT and X_HEIGHT if they exist in the font.
*/
if ((p = bdf_get_font_property(font, "CAP_HEIGHT")) != 0)
gr->cap_height = (short) p->value.int32;
if ((p = bdf_get_font_property(font, "X_HEIGHT")) != 0)
gr->x_height = (short) p->value.int32;
masks = 0;
switch (gr->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
/*
* Copy the font bounding box into the grid.
*/
(void) memcpy((char *) &gr->font_bbx, (char *) &font->bbx,
sizeof(bdf_bbx_t));
if (unencoded) {
gl = font->unencoded;
r = font->unencoded_used;
} else {
gl = font->glyphs;
r = font->glyphs_used;
}
/*
* Locate the specified glyph using a simple binary search.
*/
glp = 0;
if (r > 0) {
for (l = 0; r >= l; ) {
m = (l + r) >> 1;
glp = gl + m;
if (glp->encoding == code)
break;
if (glp->encoding > code)
r = m - 1;
else if (glp->encoding < code)
l = m + 1;
glp = 0;
}
}
ht = gr->font_bbx.height;
as = gr->font_bbx.ascent;
ds = gr->font_bbx.descent;
/*
* 1. Determine width and height needed from the largest of the
* width or height.
*/
gr->grid_width = gr->grid_height =
MAX(gr->font_bbx.width, gr->font_bbx.height);
/*
* 2. Make sure the grid is at least a square of the largest of the width
* or height of the glyph itself to allow room for transformations.
*/
if (glp != 0) {
/*
* Set the glyph name and other metrics.
*/
if (glp->name) {
gr->name = (char *) malloc(strlen(glp->name) + 1);
(void) memcpy(gr->name, glp->name, strlen(glp->name) + 1);
} else {
sprintf(name, "char%ld", code);
gr->name = (char *) malloc(strlen(name) + 1);
(void) memcpy(gr->name, name, strlen(name) + 1);
}
gr->dwidth = glp->dwidth;
/*
* Copy the glyph bounding box into the grid.
*/
(void) memcpy((char *) &gr->glyph_bbx, (char *) &glp->bbx,
sizeof(bdf_bbx_t));
if (glp->bbx.height < glp->bbx.ascent + glp->bbx.descent)
gsize = glp->bbx.ascent + glp->bbx.descent;
else
gsize = glp->bbx.height;
/*
* Figure the maximum of the glyph width and height.
*/
gsize = MAX(gr->glyph_bbx.width, gsize);
/*
* If either the grid width or grid height is less than the
* grid size just determined, then adjust them to the new grid size.
*/
gr->grid_width = MAX(gr->grid_width, gsize);
gr->grid_height = MAX(gr->grid_height, gsize);
} else {
/*
* The glyph doesn't exist, so make up a name for it.
*/
if (unencoded)
sprintf(name, "unencoded%ld", code);
else
sprintf(name, "char%ld", code);
gr->name = (char *) malloc(strlen(name) + 1);
(void) memcpy(gr->name, name, strlen(name) + 1);
}
/*
* If the font has character-cell or mono spacing, make sure the grid
* device width is set to the width stored in the font.
*/
if (gr->spacing != BDF_PROPORTIONAL)
gr->dwidth = font->monowidth;
/*
* Determine the vertical origin based on the font bounding box.
*/
if (ht >= as + ds)
gr->base_y = (((gr->grid_height >> 1) - (ht >> 1)) + ht) - ds;
else
gr->base_y = ((gr->grid_height >> 1) - ((as + ds) >> 1)) + as;
/*
* The final adjust is to check to see if the glyph positioned relative to
* the baseline would cause the grid to change size. This sometimes
* happens in fonts that have incorrect metrics.
*/
if (gr->base_y + gr->glyph_bbx.descent > gr->grid_height) {
gsize = gr->base_y + gr->glyph_bbx.descent;
gr->grid_width = MAX(gsize, gr->grid_width);
gr->grid_height = MAX(gsize, gr->grid_height);
}
/*
* Determine the horizontal origin based on the font bounding box and
* centered within the grid.
*/
gr->base_x = (gr->grid_width >> 1) - (gr->font_bbx.width >> 1);
if (gr->font_bbx.x_offset < 0)
gr->base_x += MYABS(gr->font_bbx.x_offset);
/*
* Allocate double the storage needed for the grid bitmap. The extra
* storage will be used for transformations.
*/
gr->bytes = ((((gr->grid_width * gr->bpp) + 7) >> 3) *
gr->grid_height) << 1;
gr->bitmap = (unsigned char *) malloc(gr->bytes);
(void) memset((char *) gr->bitmap, 0, gr->bytes);
/*
* Initialize the top-left coordinates of the glyph to the baseline
* coordinates.
*/
gr->glyph_x = gr->base_x;
gr->glyph_y = gr->base_y;
/*
* If the glyph was not found, simply return the empty grid.
*/
if (glp == 0)
return gr;
/*
* Determine the top-left coordinates of the glyph with respect to the
* baseline coordinates.
*/
gr->glyph_x = nx = gr->base_x + gr->glyph_bbx.x_offset;
gr->glyph_y = ny = gr->base_y - gr->glyph_bbx.ascent;
/*
* Now copy the glyph bitmap to the appropriate location in the
* grid.
*/
bpr = ((gr->glyph_bbx.width * gr->bpp) + 7) >> 3;
gsize = ((gr->grid_width * gr->bpp) + 7) >> 3;
for (y = 0; y < gr->glyph_bbx.height; y++, ny++) {
for (colx = nx * gr->bpp, col = x = 0; x < gr->glyph_bbx.width;
x++, col += gr->bpp, colx += gr->bpp) {
si = (col & 7) / gr->bpp;
byte = glp->bitmap[(y * bpr) + (col >> 3)] & masks[si];
if (byte) {
di = (colx & 7) / gr->bpp;
if (di < si)
byte <<= (si - di) * gr->bpp;
else if (di > si)
byte >>= (di - si) * gr->bpp;
gr->bitmap[(ny * gsize) + (colx >> 3)] |= byte;
}
}
}
/*
* Always crop the glyph to the ink bounds before editing.
*/
bdf_grid_crop(gr, 0);
/*
* Return the grid.
*/
return gr;
}
void
#ifdef __STDC__
bdf_free_glyph_grid(bdf_glyph_grid_t *grid)
#else
bdf_free_glyph_grid(grid)
bdf_glyph_grid_t *grid;
#endif
{
if (grid == 0)
return;
if (grid->name != 0)
free(grid->name);
if (grid->bytes > 0)
free((char *) grid->bitmap);
if (grid->sel.bytes > 0)
free((char *) grid->sel.bitmap);
free((char *) grid);
}
/**************************************************************************
*
* Glyph grid resize functions.
*
**************************************************************************/
/*
* Enlarge the grid without affecting the font or glyph metrics.
*/
int
#ifdef __STDC__
bdf_grid_enlarge(bdf_glyph_grid_t *grid, unsigned short width,
unsigned short height)
#else
bdf_grid_enlarge(grid, width, height)
bdf_glyph_grid_t *grid;
unsigned short width, height;
#endif
{
unsigned short si, di, col, colx, byte;
short ht, wd, as, ds, x, y, nx, ny;
unsigned short gwd, ght, bytes, obpr, nbpr, gsize;
unsigned char *bitmap, *masks;
if (grid == 0 || (width < grid->grid_width && height < grid->grid_height))
return 0;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
ht = height;
as = grid->font_bbx.ascent;
ds = grid->font_bbx.descent;
gwd = MAX(width, grid->grid_width);
ght = MAX(height, grid->grid_height);
gsize = MAX(gwd, ght);
nbpr = ((gsize * grid->bpp) + 7) >> 3;
bytes = (nbpr * ght) << 1;
bitmap = (unsigned char *) malloc(bytes);
(void) memset((char *) bitmap, 0, bytes);
/*
* Determine the new baseline.
*/
if (ht >= as + ds)
grid->base_y = (((ght >> 1) - (ht >> 1)) + ht) - ds;
else
grid->base_y = ((ght >> 1) - ((as + ds) >> 1)) + as;
grid->base_x = (gwd >> 1) - (grid->font_bbx.width >> 1);
if (grid->font_bbx.x_offset < 0)
grid->base_x += MYABS(grid->font_bbx.x_offset);
nx = grid->base_x + grid->glyph_bbx.x_offset;
ny = grid->base_y - grid->glyph_bbx.ascent;
/*
* Now copy the bitmap into the new storage base on the new metrics
* values.
*/
obpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
wd = grid->glyph_x + grid->glyph_bbx.width;
ht = grid->glyph_y + grid->glyph_bbx.height;
for (y = grid->glyph_y; y < ht; y++, ny++) {
col = grid->glyph_x * grid->bpp;
colx = nx * grid->bpp;
for (x = grid->glyph_x; x < wd;
x++, col += grid->bpp, colx += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = grid->bitmap[(y * obpr) + (col >> 3)] & masks[si];
if (byte) {
di = (colx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
bitmap[(ny * nbpr) + (colx >> 3)] |= byte;
}
}
}
/*
* Adjust the glyph coordinates.
*/
grid->glyph_x = grid->base_x + grid->glyph_bbx.x_offset;
grid->glyph_y = grid->base_y - grid->glyph_bbx.ascent;
/*
* Get rid of the old grid bitmap and replace it with the new one.
*/
free((char *) grid->bitmap);
grid->bytes = bytes;
grid->bitmap = bitmap;
/*
* Update the new grid width and height.
*/
grid->grid_width = grid->grid_height = gsize;
/*
* Always mark the grid as being modified on a resize.
*/
grid->modified = 1;
return 1;
}
/*
* Change the font bounding box values and resize the grid bitmap if
* necessary.
*/
int
#ifdef __STDC__
bdf_grid_resize(bdf_glyph_grid_t *grid, bdf_metrics_t *metrics)
#else
bdf_grid_resize(grid, metrics)
bdf_glyph_grid_t *grid;
bdf_metrics_t *metrics;
#endif
{
int changed;
unsigned short si, di, col, colx, byte;
short ht, wd, as, ds, x, y, nx, ny;
unsigned short gwd, ght, bytes, obpr, nbpr, gsize;
unsigned char *bitmap, *masks;
changed = 0;
if (grid == 0 || metrics == 0)
return changed;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
/*
* Create new grid bitmaps in preparation for the various metrics changing.
*/
if (metrics->width > grid->grid_width ||
metrics->height > grid->grid_height) {
changed = 1;
ht = metrics->height;
as = metrics->ascent;
ds = metrics->descent;
gwd = MAX(metrics->width, grid->grid_width);
ght = MAX(metrics->height, grid->grid_height);
/*
* Get the larger of the two dimensions.
*/
gsize = MAX(gwd, ght);
nbpr = ((gsize * grid->bpp) + 7) >> 3;
bytes = (nbpr * gsize) << 1;
bitmap = (unsigned char *) malloc(bytes);
(void) memset((char *) bitmap, 0, bytes);
/*
* Determine the new baseline.
*/
if (ht >= as + ds)
grid->base_y = (((ght >> 1) - (ht >> 1)) + ht) - ds;
else
grid->base_y = ((ght >> 1) - ((as + ds) >> 1)) + as;
grid->base_x = (gwd >> 1) - (metrics->width >> 1);
if (metrics->x_offset < 0)
grid->base_x += MYABS(metrics->x_offset);
nx = grid->base_x + grid->glyph_bbx.x_offset;
ny = grid->base_y - grid->glyph_bbx.ascent;
/*
* Now copy the bitmap into the new storage base on the new metrics
* values.
*/
obpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
wd = grid->glyph_x + grid->glyph_bbx.width;
ht = grid->glyph_y + grid->glyph_bbx.height;
for (y = grid->glyph_y; y < ht; y++, ny++) {
col = grid->glyph_x * grid->bpp;
colx = nx * grid->bpp;
for (x = grid->glyph_x; x < wd;
x++, col += grid->bpp, colx += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = grid->bitmap[(y * obpr) + (col >> 3)] & masks[si];
if (byte) {
di = (colx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
bitmap[(ny * nbpr) + (colx >> 3)] |= byte;
}
}
}
/*
* Adjust the glyph coordinates.
*/
grid->glyph_x = grid->base_x + grid->glyph_bbx.x_offset;
grid->glyph_y = grid->base_y - grid->glyph_bbx.ascent;
/*
* Get rid of the old grid bitmap and replace it with the new one.
*/
free((char *) grid->bitmap);
grid->bytes = bytes;
grid->bitmap = bitmap;
/*
* Update the new grid width and height.
*/
grid->grid_width = grid->grid_height = gsize;
/*
* Copy the metrics info into the font bounding box.
*/
grid->font_bbx.width = metrics->width;
grid->font_bbx.x_offset = metrics->x_offset;
grid->font_bbx.height = metrics->height;
grid->font_bbx.ascent = metrics->ascent;
grid->font_bbx.descent = metrics->descent;
grid->font_bbx.y_offset = metrics->y_offset;
} else {
/*
* The grid does not need to resized, but the baseline must
* be recalculated and the bitmap copied again.
*/
bytes = grid->bytes >> 1;
bitmap = grid->bitmap + bytes;
(void) memset((char *) bitmap, 0, bytes);
ht = metrics->height;
as = metrics->ascent;
ds = metrics->descent;
gwd = grid->grid_width;
ght = grid->grid_height;
/*
* Determine the new baseline.
*/
if (ht >= as + ds)
grid->base_y = (((ght >> 1) - (ht >> 1)) + ht) - ds;
else
grid->base_y = ((ght >> 1) - ((as + ds) >> 1)) + as;
grid->base_x = (gwd >> 1) - (metrics->width >> 1);
if (metrics->x_offset < 0)
grid->base_x += MYABS(metrics->x_offset);
nx = grid->base_x + grid->glyph_bbx.x_offset;
ny = grid->base_y - grid->glyph_bbx.ascent;
wd = grid->glyph_x + grid->glyph_bbx.width;
ht = grid->glyph_y + grid->glyph_bbx.height;
obpr = nbpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
for (y = grid->glyph_y; y < ht; y++, ny++) {
col = grid->glyph_x * grid->bpp;
colx = nx * grid->bpp;
for (x = grid->glyph_x; x < wd;
x++, col += grid->bpp, colx += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = grid->bitmap[(y * obpr) + (col >> 3)] & masks[si];
if (byte) {
di = (colx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
bitmap[(ny * nbpr) + (colx >> 3)] |= byte;
}
}
}
/*
* Copy the adjusted bitmap back into the main area.
*/
(void) memcpy((char *) grid->bitmap, (char *) bitmap, bytes);
/*
* Adjust the glyph coordinates.
*/
grid->glyph_x = grid->base_x + grid->glyph_bbx.x_offset;
grid->glyph_y = grid->base_y - grid->glyph_bbx.ascent;
/*
* Copy the metrics info into the font bounding box.
*/
grid->font_bbx.width = metrics->width;
grid->font_bbx.x_offset = metrics->x_offset;
grid->font_bbx.height = metrics->height;
grid->font_bbx.ascent = metrics->ascent;
grid->font_bbx.descent = metrics->descent;
grid->font_bbx.y_offset = metrics->y_offset;
}
/*
* If the font is not proportional, make sure the device width is adjusted
* to meet the new font bounding box.
*/
if (changed && grid->spacing != BDF_PROPORTIONAL)
grid->dwidth = grid->font_bbx.width;
/*
* Always mark the grid as being modified on a resize.
*/
grid->modified = 1;
return changed;
}
int
#ifdef __STDC__
bdf_grid_crop(bdf_glyph_grid_t *grid, int grid_modified)
#else
bdf_grid_crop(grid, grid_modified)
bdf_glyph_grid_t *grid;
int grid_modified;
#endif
{
int cropped;
short x, y, delta, maxx, minx, maxy, miny, col;
unsigned short bpr;
unsigned char *masks;
cropped = 0;
if (grid == 0)
return cropped;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
maxx = maxy = -1;
minx = miny = grid->grid_width;
for (y = 0; y < grid->grid_height; y++) {
for (col = x = 0; x < grid->grid_width; x++, col += grid->bpp) {
if (grid->bitmap[(y * bpr) + (col >> 3)] &
masks[(col & 7) / grid->bpp]) {
minx = MIN(minx, x);
maxx = MAX(maxx, x);
miny = MIN(miny, y);
maxy = MAX(maxy, y);
}
}
}
/*
* Handle an empty bitmap as a special case.
*/
if (maxx == -1) {
/*
* If the glyph bounding box indicated something was there originally,
* then indicate that it was cropped.
*/
if (grid->glyph_bbx.width != 0 || grid->glyph_bbx.height != 0)
cropped = 1;
(void) memset((char *) &grid->glyph_bbx, 0, sizeof(bdf_bbx_t));
grid->glyph_x = grid->base_x;
grid->glyph_y = grid->base_y;
if (cropped)
grid->modified = 1;
return cropped;
}
/*
* Increment the max points so width and height calculations won't go
* wrong.
*/
maxx++;
maxy++;
if (minx != grid->glyph_x) {
cropped = 1;
delta = minx - grid->glyph_x;
grid->glyph_x += delta;
grid->glyph_bbx.x_offset += delta;
}
if (maxx - minx != grid->glyph_bbx.width) {
cropped = 1;
delta = (maxx - minx) - grid->glyph_bbx.width;
grid->glyph_bbx.width += delta;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth += delta;
}
if (miny != grid->glyph_y) {
cropped = 1;
delta = miny - grid->glyph_y;
grid->glyph_y += delta;
grid->glyph_bbx.y_offset =
grid->base_y - (grid->glyph_y + (maxy - miny));
}
if (maxy - miny != grid->glyph_bbx.height) {
cropped = 1;
delta = (maxy - miny) - grid->glyph_bbx.height;
grid->glyph_bbx.height += delta;
grid->glyph_bbx.y_offset =
grid->base_y - (grid->glyph_y + (maxy - miny));
grid->glyph_bbx.ascent =
grid->glyph_bbx.height + grid->glyph_bbx.y_offset;
grid->glyph_bbx.descent = -grid->glyph_bbx.y_offset;
}
/*
* Indicate that the grid was modified if the glyph had to be cropped.
*/
if (cropped && grid_modified)
grid->modified = 1;
return cropped;
}
/**************************************************************************
*
* Glyph grid pixel functions.
*
**************************************************************************/
int
#ifdef __STDC__
bdf_grid_set_pixel(bdf_glyph_grid_t *grid, short x, short y, int val)
#else
bdf_grid_set_pixel(grid, x, y, val)
bdf_glyph_grid_t *grid;
short x, y;
int val;
#endif
{
unsigned short si, di, dx;
int set, bpr, delta;
unsigned char *masks;
set = 0;
if (grid == 0 || x < 0 || x >= grid->grid_width ||
y < 0 || y >= grid->grid_height)
return set;
si = 0;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; si = 7; break;
case 2: masks = twobpp; si = 3; break;
case 4: masks = fourbpp; si = 1; break;
}
/*
* Remove any unused bits from the value.
*/
val &= masks[si];
dx = x * grid->bpp;
di = (dx & 7) / grid->bpp;
/*
* Shift up the value to the appropriate place if necessary.
*/
if (di < si)
val <<= (si - di) * grid->bpp;
/*
* Determine the bytes-per-row.
*/
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
/*
* If the bit is already set, simply return with an indication that
* nothing changed.
*/
if ((grid->bitmap[(y * bpr) + (dx >> 3)] & masks[di]) == val)
return set;
/*
* Set the bit.
*/
set = 1;
/*
* Clear the bits that will take the new value.
*/
grid->bitmap[(y * bpr) + (dx >> 3)] &= ~masks[di];
grid->bitmap[(y * bpr) + (dx >> 3)] |= val;
/*
* Adjust the glyph bounding box.
*/
if (x < grid->glyph_x) {
delta = grid->glyph_x - x;
grid->glyph_bbx.width += delta;
grid->glyph_bbx.x_offset -= delta;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth = grid->glyph_bbx.width + grid->glyph_bbx.x_offset;
grid->glyph_x -= delta;
} else if (x >= grid->glyph_x + grid->glyph_bbx.width) {
delta = x - (grid->glyph_x + grid->glyph_bbx.width) + 1;
grid->glyph_bbx.width += delta;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth = grid->glyph_bbx.width + grid->glyph_bbx.x_offset;
}
if (y < grid->glyph_y) {
delta = grid->glyph_y - y;
grid->glyph_bbx.ascent += delta;
grid->glyph_bbx.height += delta;
grid->glyph_y -= delta;
} else if (y >= grid->glyph_y + grid->glyph_bbx.height) {
delta = y - (grid->glyph_y + grid->glyph_bbx.height) + 1;
grid->glyph_bbx.descent += delta;
grid->glyph_bbx.height += delta;
grid->glyph_bbx.y_offset = -grid->glyph_bbx.descent;
}
/*
* Indicate that the glyph was modified.
*/
grid->modified = 1;
return set;
}
int
#ifdef __STDC__
bdf_grid_clear_pixel(bdf_glyph_grid_t *grid, short x, short y)
#else
bdf_grid_clear_pixel(grid, x, y)
bdf_glyph_grid_t *grid;
short x, y;
#endif
{
int cleared, bpr;
short delta, maxx, minx, maxy, miny, wd, ht;
unsigned short di, dx;
unsigned char *masks;
cleared = 0;
if (grid == 0 || x < 0 || x >= grid->grid_width ||
y < 0 || y >= grid->grid_height)
return cleared;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
/*
* Determine the bytes-per-row.
*/
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
dx = x * grid->bpp;
di = (dx & 7) / grid->bpp;
/*
* If the bit is already clear, simply return with an indication that
* nothing changed.
*/
if (!(grid->bitmap[(y * bpr) + (dx >> 3)] & masks[di]))
return cleared;
/*
* Clear the bit.
*/
cleared = 1;
grid->bitmap[(y * bpr) + (dx >> 3)] &= ~masks[di];
/*
* Determine the new min and max values.
*/
maxx = maxy = 0;
minx = miny = 32767;
wd = grid->glyph_x + grid->glyph_bbx.width;
ht = grid->glyph_y + grid->glyph_bbx.height;
for (y = grid->glyph_y; y < ht; y++) {
dx = grid->glyph_x * grid->bpp;
for (x = grid->glyph_x; x < wd; x++, dx += grid->bpp) {
di = (dx & 7) / grid->bpp;
if (grid->bitmap[(y * bpr) + (dx >> 3)] & masks[di]) {
minx = MIN(minx, x);
maxx = MAX(maxx, x);
miny = MIN(miny, y);
maxy = MAX(maxy, y);
}
}
}
/*
* If this call clears the last bit in the image, set the glyph origin
* to the base and return.
*/
if (maxx == 0) {
grid->glyph_x = grid->base_x;
grid->glyph_y = grid->base_y;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth = 0;
(void) memset((char *) &grid->glyph_bbx, 0, sizeof(grid->glyph_bbx));
grid->modified = 1;
return cleared;
}
/*
* Figure out the left and right bearing changes.
*/
if (minx > grid->glyph_x) {
delta = minx - grid->glyph_x;
grid->glyph_bbx.width -= delta;
grid->glyph_bbx.x_offset += delta;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth = grid->glyph_bbx.width + grid->glyph_bbx.x_offset;
grid->glyph_x += delta;
} else if (maxx < wd - 1) {
delta = (wd - 1) - maxx;
grid->glyph_bbx.width -= delta;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth = grid->glyph_bbx.width + grid->glyph_bbx.x_offset;
}
if (miny > grid->glyph_y) {
delta = miny - grid->glyph_y;
grid->glyph_bbx.ascent -= delta;
grid->glyph_bbx.height -= delta;
grid->glyph_y += delta;
} else if (maxy < ht - 1) {
delta = (ht - 1) - maxy;
grid->glyph_bbx.descent -= delta;
grid->glyph_bbx.height -= delta;
grid->glyph_bbx.y_offset = -grid->glyph_bbx.descent;
}
/*
* Indicate that the glyph was modified.
*/
grid->modified = 1;
return cleared;
}
int
#ifdef __STDC__
bdf_grid_invert_pixel(bdf_glyph_grid_t *grid, short x, short y, int val)
#else
bdf_grid_invert_pixel(grid, x, y, val)
bdf_glyph_grid_t *grid;
short x, y;
int val;
#endif
{
short bpr, di;
unsigned char *masks;
if (grid == 0 || x < 0 || x >= grid->grid_width ||
y < 0 || y >= grid->grid_height)
return 0;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
/*
* Determine the bytes-per-row and mask index.
*/
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
di = ((x * grid->bpp) & 7) / grid->bpp;
/*
* If the bit is set, then clear it, otherwise, set it.
*/
if (grid->bitmap[(y * bpr) + ((x * grid->bpp) >> 3)] & masks[di])
return bdf_grid_clear_pixel(grid, x, y);
else
return bdf_grid_set_pixel(grid, x, y, val);
}
/**************************************************************************
*
* Glyph grid bitmap transformation functions.
*
**************************************************************************/
short
#ifdef __STDC__
_bdf_ceiling(double v)
#else
_bdf_ceiling(v)
double v;
#endif
{
short val, neg;
val = neg = 0;
if (v < 0) {
neg = 1;
while (v < -1.0) {
val++;
v += 1.0;
}
} else if (v > 0) {
while (v > 1.0) {
val++;
v -= 1.0;
}
if (v > 0.0)
val++;
}
return (!neg) ? val : -val;
}
static int
#ifdef __STDC__
_bdf_rotate_selection(bdf_glyph_grid_t *grid, int mul90, short degrees)
#else
_bdf_rotate_selection(grid, mul90, degrees)
bdf_glyph_grid_t *grid;
int mul90;
short degrees;
#endif
{
int rotated, byte;
short wd, ht, nx, ny, cx, cy, x, y, col;
short ox, oy, shiftx, shifty, si, di;
double dx, dy;
unsigned short bytes, bpr;
unsigned char *scratch, *masks;
rotated = 0;
/*
* Check to see if the number of rotations would have no affect by
* checking if the count is a multiple of 4 (mod 4 == 0).
*/
if (grid == 0 || degrees == 0)
return rotated;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
bytes = grid->sel.bytes >> 1;
scratch = grid->sel.bitmap + bytes;
(void) memset((char *) scratch, 0, bytes);
cx = grid->sel.width >> 1;
cy = grid->sel.height >> 1;
wd = ht = MAX(grid->sel.width, grid->sel.height);
cx = cy = wd >> 1;
bpr = ((wd * grid->bpp) + 7) >> 3;
for (shiftx = shifty = y = 0; y < ht; y++) {
for (col = x = 0; x < wd; x++, col += grid->bpp) {
dx = (double) (x - cx);
dy = (double) (y - cy);
if (mul90) {
nx = cx + (short) ((dx * _bdf_cos_tbl[degrees]) -
(dy * _bdf_sin_tbl[degrees]));
ny = cy + (short) ((dx * _bdf_sin_tbl[degrees]) +
(dy * _bdf_cos_tbl[degrees]));
} else {
nx = cx + _bdf_ceiling((dx * _bdf_cos_tbl[degrees]) -
(dy * _bdf_sin_tbl[degrees]));
ny = cy + _bdf_ceiling((dx * _bdf_sin_tbl[degrees]) +
(dy * _bdf_cos_tbl[degrees]));
}
/*
* Wrap the coordinates around the edges if necessary.
*/
if (nx < 0) {
shiftx = MIN(shiftx, nx);
nx += wd;
} else if (nx >= wd) {
ox = (nx - wd) + 1;
shiftx = MAX(shiftx, ox);
nx -= wd;
}
if (ny < 0) {
shifty = MIN(shifty, ny);
ny += ht;
} else if (ny >= ht) {
oy = (ny - ht) + 1;
shifty = MAX(shifty, oy);
ny -= ht;
}
si = (col & 7) / grid->bpp;
byte = grid->sel.bitmap[(y * bpr) + (col >> 3)] & masks[si];
if (byte) {
rotated = 1;
nx *= grid->bpp;
di = (nx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
scratch[(ny * bpr) + (nx >> 3)] |= byte;
}
}
}
if (rotated) {
/*
* If a shift is required, then shift the scratch area back into
* the main bitmap.
*/
if (shiftx || shifty) {
(void) memset((char *) grid->sel.bitmap, 0, bytes);
for (y = 0; y < ht; y++) {
for (col = x = 0; x < wd; x++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = scratch[(y * bpr) + (col >> 3)] & masks[si];
if (byte) {
nx = x - shiftx;
ny = y - shifty;
if (nx < 0)
nx += wd;
else if (nx >= wd)
nx -= wd;
if (ny < 0)
ny += ht;
else if (ny >= ht)
ny -= ht;
nx *= grid->bpp;
di = (nx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
grid->sel.bitmap[(ny * bpr) + (nx >> 3)] |= byte;
}
}
}
} else
/*
* Copy the scratch buffer back to the main buffer.
*/
(void) memcpy((char *) grid->sel.bitmap, (char *) scratch, bytes);
/*
* Determine the new selection width and height.
*/
ox = oy = 0;
nx = ny = 16384;
for (y = 0; y < ht; y++) {
for (col = x = 0; x < wd; x++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
if (grid->sel.bitmap[(y * bpr) + (col >> 3)] & masks[si]) {
ox = MAX(ox, x);
nx = MIN(nx, x);
oy = MAX(oy, y);
ny = MIN(ny, y);
}
}
}
/*
* Recalculate the center corrdinates so the selection will be
* positioned nicely once it is shifted to the upper left corner.
*/
cx = grid->sel.width >> 1;
cy = grid->sel.height >> 1;
/*
* Set the new width and height.
*/
grid->sel.width = (ox - nx) + 1;
grid->sel.height = (oy - ny) + 1;
/*
* Shift again to force the selection to the upper left corner.
*/
if (nx || ny) {
(void) memset((char *) scratch, 0, bytes);
for (y = 0; y < ht; y++) {
for (col = x = 0; x < wd; x++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = grid->sel.bitmap[(y * bpr) + (col >> 3)] &
masks[si];
if (byte) {
oy = y - ny;
ox = (x - nx) * grid->bpp;
di = (ox & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
scratch[(oy * bpr) + (ox >> 3)] |= byte;
}
}
}
(void) memcpy((char *) grid->sel.bitmap, (char *) scratch, bytes);
}
/*
* Determine the new top left coordinates from the center coordinates.
*/
grid->sel.x = (grid->sel.x + cx) - (grid->sel.width >> 1);
grid->sel.y = (grid->sel.y + cy) - (grid->sel.height >> 1);
/*
* If the rotation caused the selection rectangle to overlap the edges
* of the grid, shift it so it is completely visible again.
*/
if (grid->sel.x + grid->sel.width > grid->grid_width)
grid->sel.x -= (grid->sel.x + grid->sel.width) - grid->grid_width;
if (grid->sel.y + grid->sel.height > grid->grid_height)
grid->sel.y -= (grid->sel.y + grid->sel.height) - grid->grid_height;
/*
* Mark the grid as being modified.
*/
grid->modified = 1;
}
return rotated;
}
static void
#ifdef __STDC__
_bdf_rotate_resize(bdf_glyph_grid_t *grid, int mul90, short degrees,
int *resize)
#else
_bdf_rotate_resize(grid, mul90, degrees, resize)
bdf_glyph_grid_t *grid;
int mul90;
short degrees;
int *resize;
#endif
{
unsigned short wd, ht;
short cx, cy, x1, y1, x2, y2;
double dx1, dy1, dx2, dy2;
bdf_metrics_t metrics;
*resize = 0;
(void) memset((char *) &metrics, 0, sizeof(bdf_metrics_t));
metrics.x_offset = grid->font_bbx.x_offset;
metrics.width = grid->font_bbx.width;
metrics.ascent = grid->font_bbx.ascent;
metrics.descent = grid->font_bbx.descent;
metrics.height = grid->font_bbx.height;
metrics.y_offset = grid->font_bbx.y_offset;
cx = grid->glyph_x + (grid->glyph_bbx.width >> 1);
cy = grid->glyph_y + (grid->glyph_bbx.height >> 1);
/*
* Rotate the lower left and upper right corners and check for a potential
* resize.
*/
x1 = grid->glyph_x;
y1 = grid->glyph_y + grid->glyph_bbx.height;
x2 = grid->glyph_x + grid->glyph_bbx.width;
y2 = grid->glyph_y;
dx1 = (double) (x1 - cx);
dy1 = (double) (y1 - cy);
dx2 = (double) (x2 - cx);
dy2 = (double) (y2 - cx);
if (mul90) {
x1 = cx + (short) ((dx1 * _bdf_cos_tbl[degrees]) -
(dy1 * _bdf_sin_tbl[degrees]));
y1 = cy + (short) ((dx1 * _bdf_sin_tbl[degrees]) +
(dy1 * _bdf_cos_tbl[degrees]));
x2 = cx + (short) ((dx2 * _bdf_cos_tbl[degrees]) -
(dy2 * _bdf_sin_tbl[degrees]));
y2 = cy + (short) ((dx2 * _bdf_sin_tbl[degrees]) +
(dy2 * _bdf_cos_tbl[degrees]));
} else {
x1 = cx + _bdf_ceiling((dx1 * _bdf_cos_tbl[degrees]) -
(dy1 * _bdf_sin_tbl[degrees]));
y1 = cy + _bdf_ceiling((dx1 * _bdf_sin_tbl[degrees]) +
(dy1 * _bdf_cos_tbl[degrees]));
x2 = cx + _bdf_ceiling((dx2 * _bdf_cos_tbl[degrees]) -
(dy2 * _bdf_sin_tbl[degrees]));
y2 = cy + _bdf_ceiling((dx2 * _bdf_sin_tbl[degrees]) +
(dy2 * _bdf_cos_tbl[degrees]));
}
wd = MYABS(x2 - x1);
ht = MYABS(y2 - y1);
if (wd > metrics.width) {
metrics.width += wd - grid->font_bbx.width;
*resize = 1;
}
if (ht > metrics.height) {
metrics.ascent += ht - grid->font_bbx.height;
metrics.height += ht - grid->font_bbx.height;
*resize = 1;
}
/*
* Rotate the upper left and lower right corners and check for a potential
* resize.
*/
x1 = grid->glyph_x;
y1 = grid->glyph_y;
x2 = grid->glyph_x + grid->glyph_bbx.width;
y2 = grid->glyph_y + grid->glyph_bbx.height;
dx1 = (double) (x1 - cx);
dy1 = (double) (y1 - cy);
dx2 = (double) (x2 - cx);
dy2 = (double) (y2 - cx);
if (mul90) {
x1 = cx + (short) ((dx1 * _bdf_cos_tbl[degrees]) -
(dy1 * _bdf_sin_tbl[degrees]));
y1 = cy + (short) ((dx1 * _bdf_sin_tbl[degrees]) +
(dy1 * _bdf_cos_tbl[degrees]));
x2 = cx + (short) ((dx2 * _bdf_cos_tbl[degrees]) -
(dy2 * _bdf_sin_tbl[degrees]));
y2 = cy + (short) ((dx2 * _bdf_sin_tbl[degrees]) +
(dy2 * _bdf_cos_tbl[degrees]));
} else {
x1 = cx + _bdf_ceiling((dx1 * _bdf_cos_tbl[degrees]) -
(dy1 * _bdf_sin_tbl[degrees]));
y1 = cy + _bdf_ceiling((dx1 * _bdf_sin_tbl[degrees]) +
(dy1 * _bdf_cos_tbl[degrees]));
x2 = cx + _bdf_ceiling((dx2 * _bdf_cos_tbl[degrees]) -
(dy2 * _bdf_sin_tbl[degrees]));
y2 = cy + _bdf_ceiling((dx2 * _bdf_sin_tbl[degrees]) +
(dy2 * _bdf_cos_tbl[degrees]));
}
wd = MYABS(x2 - x1);
ht = MYABS(y2 - y1);
if (wd > metrics.width) {
metrics.width += wd - grid->font_bbx.width;
*resize = 1;
}
if (ht > metrics.height) {
metrics.ascent += ht - grid->font_bbx.height;
metrics.height += ht - grid->font_bbx.height;
*resize = 1;
}
if (*resize)
(void) bdf_grid_resize(grid, &metrics);
}
static void
#ifdef __STDC__
_bdf_shear_resize(bdf_glyph_grid_t *grid, short degrees, int neg, int *resize)
#else
_bdf_shear_resize(grid, degrees, neg, resize)
bdf_glyph_grid_t *grid;
short degrees;
int neg, *resize;
#endif
{
unsigned short wd;
short x1, y1, x2, y2;
bdf_metrics_t metrics;
*resize = 0;
(void) memset((char *) &metrics, 0, sizeof(bdf_metrics_t));
metrics.x_offset = grid->font_bbx.x_offset;
metrics.width = grid->font_bbx.width;
metrics.ascent = grid->font_bbx.ascent;
metrics.descent = grid->font_bbx.descent;
metrics.height = grid->font_bbx.height;
metrics.y_offset = grid->font_bbx.y_offset;
/*
* Shear the lower left and upper right corners and check for a potential
* resize.
*/
x1 = 0;
y1 = grid->glyph_bbx.height;
x2 = grid->glyph_bbx.width;
y2 = 0;
if (neg) {
x1 += (short) ((double) y1 * _bdf_tan_tbl[degrees]);
x2 += (short) ((double) y2 * _bdf_tan_tbl[degrees]);
} else {
x1 += (short) ((double) (grid->glyph_bbx.height - y1) *
_bdf_tan_tbl[degrees]);
x2 += (short) ((double) (grid->glyph_bbx.height - y2) *
_bdf_tan_tbl[degrees]);
}
wd = MYABS(x2 - x1);
if (wd > metrics.width) {
metrics.width += wd - grid->font_bbx.width;
*resize = 1;
}
/*
* Shear the upper left and lower right corners and check for a potential
* resize.
*/
x1 = 0;
y1 = 0;
x2 = grid->glyph_bbx.width;
y2 = grid->glyph_bbx.height;
if (neg) {
x1 += (short) ((double) y1 * _bdf_tan_tbl[degrees]);
x2 += (short) ((double) y2 * _bdf_tan_tbl[degrees]);
} else {
x1 += (short) ((double) (grid->glyph_bbx.height - y1) *
_bdf_tan_tbl[degrees]);
x2 += (short) ((double) (grid->glyph_bbx.height - y2) *
_bdf_tan_tbl[degrees]);
}
wd = MYABS(x2 - x1);
if (wd > metrics.width) {
metrics.width += wd - grid->font_bbx.width;
*resize = 1;
}
if (*resize)
(void) bdf_grid_resize(grid, &metrics);
}
/*
* Rotate the bitmap in the grid by some number of degrees.
*/
int
#ifdef __STDC__
bdf_grid_rotate(bdf_glyph_grid_t *grid, short degrees, int *resize)
#else
bdf_grid_rotate(grid, degrees, resize)
bdf_glyph_grid_t *grid;
short degrees;
int *resize;
#endif
{
int rotated, mul90;
short nx, ny, cx, cy, x, y, wd, ht;
short ox, oy, gx, gy, shiftx, shifty;
unsigned short si, di, col, byte;
double dx, dy;
unsigned short bytes, bpr;
unsigned char *scratch, *masks;
rotated = 0;
/*
* Make sure the number of degrees is between 0 and 359 and adjusted to a
* positive number of degrees if necessary.
*/
while (degrees < 0)
degrees += 360;
while (degrees >= 360)
degrees -= 360;
if (grid == 0 || degrees == 0 ||
(grid->glyph_bbx.width == 0 && grid->glyph_bbx.height == 0))
return rotated;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
mul90 = ((degrees % 90) == 0) ? 1 : 0;
/*
* Force the grid to resize if the rotation requires it.
*/
_bdf_rotate_resize(grid, mul90, degrees, resize);
if (grid->sel.width != 0 && grid->sel.height != 0)
return _bdf_rotate_selection(grid, mul90, degrees);
/*
* Halve the byte count in the grid for later use.
*/
bytes = grid->bytes >> 1;
/*
* Point at the scratch buffer area and initialize it.
*/
scratch = grid->bitmap + bytes;
(void) memset((char *) scratch, 0, bytes);
/*
* Determine the bytes per row.
*/
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
/*
* Determine the center coordinates of the glyph bitmap rectangle.
*/
cx = grid->glyph_x + (grid->glyph_bbx.width >> 1);
cy = grid->glyph_y + (grid->glyph_bbx.height >> 1);
/*
* Only run over the rectangle containing the glyph itself.
*/
gx = grid->glyph_x;
gy = grid->glyph_y;
wd = gx + grid->glyph_bbx.width;
ht = gy + grid->glyph_bbx.height;
/*
* Initialize the adjustment counts used if the bitmap
* wraps around the edge.
*/
shiftx = shifty = 0;
for (y = gy; y < ht; y++) {
col = gx * grid->bpp;
for (x = gx; x < wd; x++, col += grid->bpp) {
/*
* Rotate the point.
*/
dx = (double) (x - cx);
dy = (double) (y - cy);
if (mul90) {
nx = cx + (short) ((dx * _bdf_cos_tbl[degrees]) -
(dy * _bdf_sin_tbl[degrees]));
ny = cy + (short) ((dx * _bdf_sin_tbl[degrees]) +
(dy * _bdf_cos_tbl[degrees]));
} else {
nx = cx + _bdf_ceiling((dx * _bdf_cos_tbl[degrees]) -
(dy * _bdf_sin_tbl[degrees]));
ny = cy + _bdf_ceiling((dx * _bdf_sin_tbl[degrees]) +
(dy * _bdf_cos_tbl[degrees]));
}
/*
* Wrap the coordinates around the edges if necessary.
*/
if (nx < 0) {
shiftx = MIN(shiftx, nx);
nx += grid->grid_width;
} else if (nx >= grid->grid_width) {
ox = (nx - grid->grid_width) + 1;
shiftx = MAX(shiftx, ox);
nx -= grid->grid_width;
}
if (ny < 0) {
shifty = MIN(shifty, ny);
ny += grid->grid_height;
} else if (ny >= grid->grid_height) {
oy = (ny - grid->grid_height) + 1;
shifty = MAX(shifty, oy);
ny -= grid->grid_height;
}
si = (col & 7) / grid->bpp;
byte = grid->bitmap[(y * bpr) + (col >> 3)] & masks[si];
if (byte) {
rotated = 1;
nx *= grid->bpp;
di = (nx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
scratch[(ny * bpr) + (nx >> 3)] |= byte;
}
}
}
if (rotated) {
/*
* If a shift is required, then shift the scratch area back into
* the main bitmap.
*/
if (shiftx || shifty) {
(void) memset((char *) grid->bitmap, 0, bytes);
for (y = 0; y < grid->grid_height; y++) {
for (col = x = 0; x < grid->grid_width;
x++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = scratch[(y * bpr) + (col >> 3)] & masks[si];
if (byte) {
nx = x - shiftx;
ny = y - shifty;
if (nx < 0)
nx += grid->grid_width;
else if (nx >= grid->grid_width)
nx -= grid->grid_width;
if (ny < 0)
ny += grid->grid_height;
else if (ny >= grid->grid_height)
ny -= grid->grid_height;
nx *= grid->bpp;
di = (nx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
grid->bitmap[(ny * bpr) + (nx >> 3)] |= byte;
}
}
}
} else
/*
* Copy the scratch buffer back to the main buffer.
*/
(void) memcpy((char *) grid->bitmap, (char *) scratch, bytes);
/*
* Determine the new glyph bounding box and the top left coordinates.
*/
ox = oy = 0;
nx = ny = 16384;
for (y = 0; y < grid->grid_height; y++) {
for (col = x = 0; x < grid->grid_width; x++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
if (grid->bitmap[(y * bpr) + (col >> 3)] & masks[si]) {
nx = MIN(nx, x);
ox = MAX(ox, x);
ny = MIN(ny, y);
oy = MAX(oy, y);
}
}
}
/*
* Set the new top left corrdinates.
*/
grid->glyph_x = nx;
grid->glyph_y = ny;
/*
* Set the new glyph bounding box.
*/
grid->glyph_bbx.width = (ox - nx) + 1;
grid->glyph_bbx.x_offset = nx - grid->base_x;
grid->glyph_bbx.height = (oy - ny) + 1;
grid->glyph_bbx.ascent = grid->base_y - ny;
grid->glyph_bbx.descent = grid->glyph_bbx.height -
grid->glyph_bbx.ascent;
grid->glyph_bbx.y_offset = -grid->glyph_bbx.descent;
/*
* Mark the grid as being modified.
*/
grid->modified = 1;
}
return rotated;
}
int
#ifdef __STDC__
bdf_grid_shear(bdf_glyph_grid_t *grid, short degrees, int *resize)
#else
bdf_grid_shear(grid, degrees, resize)
bdf_glyph_grid_t *grid;
short degrees;
int *resize;
#endif
{
int sheared, neg;
short cx, cy, wd, ht, gx, gy, x, y;
short nx, ox, ny, oy, shiftx, shifty;
unsigned short bytes, bpr, si, di, col, byte;
unsigned char *scratch, *masks;
sheared = 0;
if (degrees == 0 || degrees < -45 || degrees > 45 || grid == 0 ||
(grid->glyph_bbx.width == 0 && grid->glyph_bbx.height == 0))
return sheared;
if ((neg = (degrees < 0)))
degrees = -degrees;
/*
* Check to see if the grid needs to be resized to hold the sheared glyph.
*/
_bdf_shear_resize(grid, degrees, neg, resize);
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
/*
* Halve the byte count in the grid for later use.
*/
bytes = grid->bytes >> 1;
/*
* Point at the scratch buffer area and initialize it.
*/
scratch = grid->bitmap + bytes;
(void) memset((char *) scratch, 0, bytes);
/*
* Determine the bytes per row.
*/
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
/*
* Determine the center coordinates of the glyph bitmap rectangle.
*/
gx = grid->glyph_x;
gy = grid->glyph_y;
cx = gx + (grid->glyph_bbx.width >> 1);
cy = gy + (grid->glyph_bbx.height >> 1);
wd = gx + grid->glyph_bbx.width;
ht = gy + grid->glyph_bbx.height;
shiftx = shifty = 0;
for (y = gy; y < ht; y++) {
col = gx * grid->bpp;
for (x = gx; x < wd; x++, col += grid->bpp) {
ny = y;
if (neg)
nx = x + (short) ((double) y * _bdf_tan_tbl[degrees]);
else
nx = x + (short) ((double) (gy + (ht - y)) *
_bdf_tan_tbl[degrees]);
if (nx < 0) {
shiftx = MIN(shiftx, nx);
nx += grid->grid_width;
} else if (nx >= grid->grid_width) {
ox = (nx - grid->grid_width) + 1;
shiftx = MAX(shiftx, ox);
nx -= grid->grid_width;
}
if (ny < 0) {
shifty = MIN(shifty, ny);
ny += grid->grid_height;
} else if (ny >= grid->grid_height) {
oy = (ny - grid->grid_height) + 1;
shifty = MAX(shifty, oy);
ny -= grid->grid_height;
}
si = (col & 7) / grid->bpp;
byte = grid->bitmap[(y * bpr) + (col >> 3)] & masks[si];
if (byte) {
sheared = 1;
nx *= grid->bpp;
di = (nx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
scratch[(y * bpr) + (nx >> 3)] |= byte;
}
}
}
if (sheared) {
/*
* If a shift is required, then shift the scratch area back into
* the main bitmap.
*/
if (shiftx || shifty) {
(void) memset((char *) grid->bitmap, 0, bytes);
for (y = 0; y < grid->grid_height; y++) {
for (col = x = 0; x < grid->grid_width;
x++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = scratch[(y * bpr) + (col >> 3)] & masks[si];
if (byte) {
nx = x - shiftx;
ny = y - shifty;
if (nx < 0)
nx += grid->grid_width;
else if (nx >= grid->grid_width)
nx -= grid->grid_width;
if (ny < 0)
ny += grid->grid_height;
else if (ny >= grid->grid_height)
ny -= grid->grid_height;
nx *= grid->bpp;
di = (nx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
grid->bitmap[(ny * bpr) + (nx >> 3)] |= byte;
}
}
}
} else
/*
* Copy the scratch buffer back to the main buffer.
*/
(void) memcpy((char *) grid->bitmap, (char *) scratch, bytes);
ox = oy = 0;
nx = ny = 16384;
for (y = 0; y < grid->grid_height; y++) {
for (col = x = 0; x < grid->grid_width; x++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
if (grid->bitmap[(y * bpr) + (col >> 3)] & masks[si]) {
ox = MAX(ox, x);
nx = MIN(nx, x);
oy = MAX(oy, y);
ny = MIN(ny, y);
}
}
}
/*
* Set the new top left corrdinates.
*/
grid->glyph_x = nx;
grid->glyph_y = ny;
/*
* Set the new glyph bounding box.
*/
grid->glyph_bbx.width = (ox - nx) + 1;
grid->glyph_bbx.x_offset = nx - grid->base_x;
grid->glyph_bbx.height = (oy - ny) + 1;
grid->glyph_bbx.ascent = grid->base_y - ny;
grid->glyph_bbx.descent = grid->glyph_bbx.height -
grid->glyph_bbx.ascent;
grid->glyph_bbx.y_offset = -grid->glyph_bbx.descent;
/*
* Mark the grid as being modified.
*/
grid->modified = 1;
}
return sheared;
}
int
#ifdef __STDC__
bdf_grid_embolden(bdf_glyph_grid_t *grid)
#else
bdf_grid_embolden(grid)
bdf_glyph_grid_t *grid;
#endif
{
int done;
short wd, ht, gx, gy, x, y;
unsigned short b1, b2, bpr, si, di, col;
unsigned char *masks;
done = 0;
if (grid == 0 ||
(grid->glyph_bbx.width == 0 && grid->glyph_bbx.height == 0))
return done;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
/*
* Determine the bytes per row.
*/
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
gx = grid->glyph_x;
gy = grid->glyph_y;
wd = gx + grid->glyph_bbx.width;
ht = gy + grid->glyph_bbx.height;
if (grid->spacing == BDF_PROPORTIONAL ||
(grid->spacing == BDF_MONOWIDTH &&
grid->glyph_bbx.width < grid->font_bbx.width))
/*
* Only allow horizontal expansion in the cases that make sense.
*/
wd++;
for (y = gy; y < ht; y++) {
col = (wd - 1) * grid->bpp;
for (x = wd - 1; x > gx; x--, col -= grid->bpp) {
si = (col & 7) / grid->bpp;
di = ((col - grid->bpp) & 7) / grid->bpp;
b1 = grid->bitmap[(y * bpr) + (col >> 3)] & masks[si];
b2 = grid->bitmap[(y * bpr) + ((col - grid->bpp) >> 3)] &
masks[di];
if (!b1 && b2) {
if (di < si)
b2 >>= (si - di) * grid->bpp;
else if (di > si)
b2 <<= (di - si) * grid->bpp;
grid->bitmap[(y * bpr) + (col >> 3)] |= b2;
/*
* Mark the grid as being modified.
*/
done = grid->modified = 1;
}
}
}
/*
* Adjust the glyph width so it will be reflected when the glyph is stored
* back in the font.
*/
grid->glyph_bbx.width = wd - gx;
return done;
}
/**************************************************************************
*
* Glyph grid selection functions.
*
**************************************************************************/
int
#ifdef __STDC__
bdf_has_selection(bdf_glyph_grid_t *grid, short *x, short *y,
short *width, short *height)
#else
bdf_has_selection(grid, x, y, width, height)
bdf_glyph_grid_t *grid;
short *x, *y, *width, *height;
#endif
{
if (grid == 0 || (grid->sel.width == 0 && grid->sel.height == 0))
return 0;
if (x != 0)
*x = grid->sel.x;
if (y != 0)
*y = grid->sel.y;
if (width != 0)
*width = grid->sel.width;
if (height != 0)
*height = grid->sel.height;
return 1;
}
/*
* Select a rectangle on the grid.
*/
void
#ifdef __STDC__
bdf_set_selection(bdf_glyph_grid_t *grid, short x, short y,
short width, short height)
#else
bdf_set_selection(grid, x, y, width, height)
bdf_glyph_grid_t *grid;
short x, y, width, height;
#endif
{
short nx, ny, wd, ht, ssize, dx, dy, col;
unsigned short bytes, bpr, sbpr, si, di, byte;
unsigned char *masks;
if (grid == 0)
return;
/*
* Make sure the specified rectangle is within reasonable bounds.
*/
if (x < 0 || x >= grid->grid_width)
x = 0;
if (y < 0 || y >= grid->grid_height)
y = 0;
if (x + width > grid->grid_width)
width = (x + width) - grid->grid_width;
if (y + height > grid->grid_height)
height = (y + height) - grid->grid_height;
grid->sel.x = x;
grid->sel.y = y;
grid->sel.width = width;
grid->sel.height = height;
/*
* Allocate enough space to represent a square the size of the largest
* of the width and height of the selection. This allows rotation and
* flipping of the selected bitmap.
*/
ssize = MAX(width, height);
bytes = ((((ssize * grid->bpp) + 7) >> 3) * ssize) << 1;
/*
* If the selection is being removed (width and height are 0), then simply
* return.
*/
if (bytes == 0)
return;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
if (bytes > grid->sel.bytes) {
if (grid->sel.bytes == 0)
grid->sel.bitmap = (unsigned char *) malloc(bytes);
else
grid->sel.bitmap = (unsigned char *)
realloc((char *) grid->sel.bitmap, bytes);
grid->sel.bytes = bytes;
} else
bytes = grid->sel.bytes;
/*
* Initialize the selection bitmap and copy the selected bits to it.
*/
(void) memset((char *) grid->sel.bitmap, 0, bytes);
wd = x + width;
ht = y + height;
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
sbpr = ((grid->sel.width * grid->bpp) + 7) >> 3;
for (ny = 0, dy = y; dy < ht; dy++, ny++) {
col = x * grid->bpp;
for (nx = 0, dx = x; dx < wd;
dx++, nx += grid->bpp, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = grid->bitmap[(dy * bpr) + (col >> 3)] & masks[si];
if (byte) {
di = (nx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
grid->sel.bitmap[(ny * sbpr) + (nx >> 3)] |= byte;
}
}
}
}
/*
* Detach a selection in preparation for moving it. What is does is clear the
* bits set in the selection from the main grid. Again, this is only used for
* move operations.
*/
void
#ifdef __STDC__
bdf_detach_selection(bdf_glyph_grid_t *grid)
#else
bdf_detach_selection(grid)
bdf_glyph_grid_t *grid;
#endif
{
short sx, sy, x, y, wd, ht, dx;
unsigned short bpr, sbpr, si, di, byte;
unsigned char *masks;
if (grid == 0 || (grid->sel.width == 0 && grid->sel.height == 0))
return;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
sbpr = ((grid->sel.width * grid->bpp) + 7) >> 3;
wd = grid->sel.x + grid->sel.width;
ht = grid->sel.y + grid->sel.height;
for (sy = 0, y = grid->sel.y; y < ht; y++, sy++) {
for (sx = 0, x = grid->sel.x; x < wd; x++, sx += grid->bpp) {
si = (sx & 7) / grid->bpp;
byte = grid->sel.bitmap[(sy * sbpr) + (sx >> 3)] & masks[si];
if (byte) {
dx = x * grid->bpp;
di = (dx & 7) / grid->bpp;
grid->bitmap[(y * bpr) + (dx >> 3)] &= ~masks[di];
}
}
}
/*
* Crop the new image to determine the new bounds with the selection.
*/
(void) bdf_grid_crop(grid, 1);
}
void
#ifdef __STDC__
bdf_attach_selection(bdf_glyph_grid_t *grid)
#else
bdf_attach_selection(grid)
bdf_glyph_grid_t *grid;
#endif
{
short sx, sy, x, y, wd, ht;
unsigned short bpr, sbpr, dx, di, si, byte;
unsigned char *masks;
if (grid == 0 || (grid->sel.width == 0 && grid->sel.height == 0))
return;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
sbpr = ((grid->sel.width * grid->bpp) + 7) >> 3;
wd = grid->sel.x + grid->sel.width;
ht = grid->sel.y + grid->sel.height;
for (sy = 0, y = grid->sel.y; y < ht; y++, sy++) {
for (sx = 0, x = grid->sel.x; x < wd; x++, sx += grid->bpp) {
si = (sx & 7) / grid->bpp;
byte = grid->sel.bitmap[(sy * sbpr) + (sx >> 3)] & masks[si];
if (byte) {
dx = x * grid->bpp;
di = (dx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
grid->bitmap[(y * bpr) + (dx >> 3)] |= byte;
}
}
}
/*
* Crop the new image to determine the new bounds with the selection.
*/
(void) bdf_grid_crop(grid, 1);
}
/*
* Indicate the selection no longer exists by setting the width and height to
* 0.
*/
void
#ifdef __STDC__
bdf_lose_selection(bdf_glyph_grid_t *grid)
#else
bdf_lose_selection(grid)
bdf_glyph_grid_t *grid;
#endif
{
if (grid == 0)
return;
grid->sel.width = grid->sel.height = 0;
}
/*
* Delete the selection by first detaching it which will erase the rectangle
* on the grid and then losing the selection.
*/
void
#ifdef __STDC__
bdf_delete_selection(bdf_glyph_grid_t *grid)
#else
bdf_delete_selection(grid)
bdf_glyph_grid_t *grid;
#endif
{
bdf_detach_selection(grid);
bdf_lose_selection(grid);
}
/*
* Check to see if a coordinate pair is in the selected region.
*/
int
#ifdef __STDC__
bdf_in_selection(bdf_glyph_grid_t *grid, short x, short y, short *set)
#else
bdf_in_selection(grid, x, y, set)
bdf_glyph_grid_t *grid;
short x, y, *set;
#endif
{
short wd, ht;
unsigned short bpr, si, di, byte;
unsigned char *masks;
if (grid == 0 || (grid->sel.width == 0 && grid->sel.height == 0))
return 0;
di = 0;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; di = 7; break;
case 2: masks = twobpp; di = 3; break;
case 4: masks = fourbpp; di = 1; break;
}
bpr = ((grid->sel.width * grid->bpp) + 7) >> 3;
wd = grid->sel.x + grid->sel.width;
ht = grid->sel.y + grid->sel.height;
if ((x >= grid->sel.x && x < wd) && (y >= grid->sel.y && y < ht)) {
if (set) {
/*
* Adjust the byte back to an index value.
*/
x *= grid->bpp;
si = (x & 7) / grid->bpp;
byte = grid->sel.bitmap[(y * bpr) + (x >> 3)] & masks[si];
if (di > si)
byte >>= (di - si) * grid->bpp;
*set = byte;
}
return 1;
}
return 0;
}
int
#ifdef __STDC__
bdf_grid_shift(bdf_glyph_grid_t *grid, short xcount, short ycount)
#else
bdf_grid_shift(grid, xcount, ycount)
bdf_glyph_grid_t *grid;
short xcount, ycount;
#endif
{
int sel, delta;
short xdir, ydir, x, y, wd, ht, dx, dy, nx, ny;
unsigned short bytes, bpr, si, di, byte, col;
unsigned char *scratch, *masks;
if (grid == 0)
return 0;
xdir = ydir = 1;
if (xcount < 0) {
xdir = -1;
xcount = -xcount;
}
if (ycount < 0) {
ydir = -1;
ycount = -ycount;
}
/*
* Adjust the shift counts if they are larger than they should be.
*/
if (xcount > grid->grid_width)
xcount -= grid->grid_width;
if (ycount > grid->grid_height)
ycount -= grid->grid_height;
/*
* Adjust the counts to limit the shift to the boundaries of the grid.
*/
if (grid->sel.width != 0 && grid->sel.height != 0) {
/*
* The selection is being shifted.
*/
x = grid->sel.x;
y = grid->sel.y;
wd = grid->sel.width;
ht = grid->sel.height;
sel = 1;
} else {
x = grid->glyph_x;
y = grid->glyph_y;
wd = grid->glyph_bbx.width;
ht = grid->glyph_bbx.height;
sel = 0;
}
/*
* If the width and height are 0, then simply return, because there
* is nothing to shift.
*/
if (wd == 0 && ht == 0)
return 0;
if (xdir == 1 && x + wd + xcount > grid->grid_width)
xcount = grid->grid_width - (x + wd);
else if (xdir == -1 && xcount > x)
xcount = x;
if (ydir == 1 && y + ht + ycount > grid->grid_height)
ycount = grid->grid_height - (y + ht);
else if (ydir == -1 && ycount > y)
ycount = y;
if (xcount == 0 && ycount == 0)
return 0;
/*
* If the selection is the one being shifted, adjust the X and Y
* coordinates and adjust the glyph metrics.
*/
if (sel) {
/*
* Determine the actual ink bounds of the selection so the
* glyph metrics can be adjusted if necessary.
*/
if (_bdf_grid_ink_bounds(grid, &x, &y, &wd, &ht)) {
/*
* Have to adjust the glyph metrics.
*/
x += xdir * xcount;
y += ydir * ycount;
if (x < grid->glyph_x) {
delta = grid->glyph_x - x;
grid->glyph_bbx.width += delta;
grid->glyph_bbx.x_offset -= delta;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth += delta;
grid->glyph_x -= delta;
} else if (x >= grid->glyph_x + grid->glyph_bbx.width) {
delta = x - (grid->glyph_x + grid->glyph_bbx.width);
grid->glyph_bbx.width += delta;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth += delta;
}
if (y < grid->glyph_y) {
delta = grid->glyph_y - y;
grid->glyph_bbx.height += delta;
grid->glyph_bbx.ascent += delta;
grid->glyph_y -= delta;
} else if (y + ht >= grid->glyph_y + grid->glyph_bbx.height) {
delta = (y + ht) - (grid->glyph_y + grid->glyph_bbx.height);
grid->glyph_bbx.height += delta;
grid->glyph_bbx.y_offset -= delta;
grid->glyph_bbx.descent += delta;
}
grid->modified = 1;
}
/*
* Adjust the top-left coordinate of the selection rectangle.
*/
grid->sel.x += xdir * xcount;
grid->sel.y += ydir * ycount;
return 1;
}
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; di = 7; break;
case 2: masks = twobpp; di = 3; break;
case 4: masks = fourbpp; di = 1; break;
}
/*
* The glyph itself is being shifted.
*/
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
bytes = grid->bytes >> 1;
scratch = grid->bitmap + bytes;
(void) memset((char *) scratch, 0, bytes);
/*
* Shift just the glyph rectangle to keep things fast.
*/
wd += x;
ht += y;
for (dy = y; dy < ht; dy++) {
col = x * grid->bpp;
for (dx = x; dx < wd; dx++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = grid->bitmap[(dy * bpr) + (col >> 3)] & masks[si];
if (byte) {
nx = dx + (xdir * xcount);
ny = dy + (ydir * ycount);
nx *= grid->bpp;
di = (nx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
scratch[(ny * bpr) + (nx >> 3)] |= byte;
}
}
}
/*
* Copy the scratch buffer back to the main buffer.
*/
(void) memcpy((char *) grid->bitmap, (char *) scratch, bytes);
/*
* Adjust the top-left coordinate of the glyph rectangle.
*/
grid->glyph_x += xdir * xcount;
grid->glyph_y += ydir * ycount;
/*
* Adjust the glyph offsets relative to the baseline coordinates.
*/
grid->glyph_bbx.x_offset = grid->glyph_x - grid->base_x;
grid->glyph_bbx.y_offset = grid->base_y -
(grid->glyph_y + grid->glyph_bbx.height);
/*
* Adjust the glyph ascent and descent.
*/
grid->glyph_bbx.ascent = grid->base_y - grid->glyph_y;
grid->glyph_bbx.descent = (grid->glyph_y + grid->glyph_bbx.height) -
grid->base_y;
/*
* Mark the grid as being modified.
*/
grid->modified = 1;
return 1;
}
int
#ifdef __STDC__
bdf_grid_flip(bdf_glyph_grid_t *grid, short dir)
#else
bdf_grid_flip(grid, dir)
bdf_glyph_grid_t *grid;
short dir;
#endif
{
int flipped, sel, delta;
short dx, dy, x, y, nx, ny, wd, ht;
unsigned short bytes, bpr, si, di, col, colx, byte;
unsigned char *bmap, *scratch, *masks;
flipped = 0;
if (grid == 0)
return flipped;
if (grid->sel.width != 0 && grid->sel.height != 0) {
sel = 1;
x = y = 0;
wd = grid->sel.width;
ht = grid->sel.height;
bpr = ((wd * grid->bpp) + 7) >> 3;
bytes = grid->sel.bytes >> 1;
bmap = grid->sel.bitmap;
} else {
sel = 0;
x = grid->glyph_x;
y = grid->glyph_y;
wd = grid->glyph_bbx.width;
ht = grid->glyph_bbx.height;
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
bytes = grid->bytes >> 1;
bmap = grid->bitmap;
}
/*
* If the width or height is 0, don't do anything.
*/
if (wd == 0|| ht == 0)
return flipped;
nx = 0;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; di = 7; break;
case 2: masks = twobpp; di = 3; break;
case 4: masks = fourbpp; di = 1; break;
}
/*
* Set and initialize the scratch area.
*/
scratch = bmap + bytes;
(void) memset((char *) scratch, 0, bytes);
wd += x;
ht += y;
if (dir < 0) {
/*
* Flip horizontally.
*/
for (dy = y; dy < ht; dy++) {
col = x * grid->bpp;
for (nx = wd - 1, dx = x; dx < wd; dx++, nx--, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = bmap[(dy * bpr) + (col >> 3)] & masks[si];
if (byte) {
flipped = 1;
colx = nx * grid->bpp;
di = (colx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
scratch[(dy * bpr) + (colx >> 3)] |= byte;
}
}
}
if (flipped) {
if (sel)
grid->sel.x += nx + 1;
else {
grid->glyph_x = nx + 1;
grid->glyph_bbx.x_offset = grid->glyph_x - grid->base_x;
}
}
} else {
/*
* Flip vertically.
*/
for (ny = ht - 1, dy = y; dy < ht; dy++, ny--) {
col = x * grid->bpp;
for (dx = x; dx < wd; dx++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = bmap[(dy * bpr) + (col >> 3)] & masks[si];
if (byte) {
flipped = 1;
scratch[(ny * bpr) + (col >> 3)] |= byte;
}
}
}
if (flipped) {
if (sel)
grid->sel.y += ny + 1;
else {
grid->glyph_y = ny + 1;
grid->glyph_bbx.y_offset = grid->base_y -
(grid->glyph_y + grid->glyph_bbx.height);
grid->glyph_bbx.ascent = grid->base_y - grid->glyph_y;
grid->glyph_bbx.descent =
(grid->glyph_y + grid->glyph_bbx.height) - grid->base_y;
}
}
}
if (flipped) {
/*
* Copy the scratch area back to the working area.
*/
if (sel)
(void) memcpy((char *) grid->sel.bitmap, (char *) scratch, bytes);
else
(void) memcpy((char *) grid->bitmap, (char *) scratch, bytes);
if (sel) {
/*
* Check to see if flipping the selection caused the glyph metrics
* to change.
*/
if (_bdf_grid_ink_bounds(grid, &x, &y, &wd, &ht)) {
if (x < grid->glyph_x) {
delta = grid->glyph_x - x;
grid->glyph_bbx.width += delta;
grid->glyph_bbx.x_offset -= delta;
grid->glyph_x -= delta;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth += delta;
} else if (x >= grid->glyph_x + grid->glyph_bbx.width) {
delta = x - (grid->glyph_x + grid->glyph_bbx.width);
grid->glyph_bbx.width += delta;
if (grid->spacing == BDF_PROPORTIONAL)
grid->dwidth += delta;
}
if (y < grid->glyph_y) {
delta = grid->glyph_y - y;
grid->glyph_bbx.height += delta;
grid->glyph_bbx.ascent += delta;
grid->glyph_y -= delta;
} else if (y >= grid->glyph_y + grid->glyph_bbx.height) {
delta = y - (grid->glyph_y + grid->glyph_bbx.height);
grid->glyph_bbx.height += delta;
grid->glyph_bbx.y_offset -= delta;
grid->glyph_bbx.descent += delta;
}
}
}
/*
* Mark the grid as being modified.
*/
grid->modified = 1;
}
return flipped;
}
void
#ifdef __STDC__
bdf_grid_origin(bdf_glyph_grid_t *grid, short *x, short *y)
#else
bdf_grid_origin(grid, x, y)
bdf_glyph_grid_t *grid;
short *x, *y;
#endif
{
if (grid == 0)
return;
*x = grid->base_x;
*y = grid->base_y;
}
bdf_glyph_t *
#ifdef __STDC__
bdf_grid_glyph(bdf_glyph_grid_t *grid)
#else
bdf_grid_glyph(grid)
bdf_glyph_grid_t *grid;
#endif
{
int len;
short x, y, nx, ny, wd, ht, gx, gy;
unsigned short bpr, nbpr, si, di, col, byte;
bdf_glyph_t *glyph;
unsigned char *masks;
double ps, dw, rx;
if (grid == 0)
return 0;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; di = 7; break;
case 2: masks = twobpp; di = 3; break;
case 4: masks = fourbpp; di = 1; break;
}
/*
* Create the new glyph.
*/
glyph = (bdf_glyph_t *) malloc(sizeof(bdf_glyph_t));
(void) memset((char *) glyph, 0, sizeof(bdf_glyph_t));
gx = grid->glyph_x;
gy = grid->glyph_y;
/*
* Copy the bounding box.
*/
(void) memcpy((char *) &glyph->bbx, (char *) &grid->glyph_bbx,
sizeof(bdf_bbx_t));
/*
* If the font has character-cell spacing, then make sure the bitmap is
* cropped to fit within the bounds of the font bbx.
*/
if (grid->spacing == BDF_CHARCELL) {
if (gx < grid->base_x) {
glyph->bbx.x_offset = 0;
glyph->bbx.width -= grid->base_x - gx;
gx += grid->base_x - gx;
}
if (glyph->bbx.width > grid->font_bbx.width)
glyph->bbx.width -= glyph->bbx.width - grid->font_bbx.width;
}
/*
* Set up its bitmap.
*/
nbpr = ((glyph->bbx.width * grid->bpp) + 7) >> 3;
glyph->bytes = nbpr * glyph->bbx.height;
glyph->bitmap = (unsigned char *) malloc(glyph->bytes);
(void) memset((char *) glyph->bitmap, 0, glyph->bytes);
/*
* Set the other values.
*/
if (grid->name != 0) {
len = strlen(grid->name) + 1;
glyph->name = (char *) malloc(len);
(void) memcpy(glyph->name, grid->name, len);
}
glyph->encoding = grid->encoding;
glyph->dwidth = grid->dwidth;
/*
* Reset the glyph SWIDTH value.
*/
ps = (double) grid->point_size;
rx = (double) grid->resolution_x;
dw = (double) grid->dwidth;
glyph->swidth = (unsigned short) ((dw * 72000.0) / (ps * rx));
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
wd = gx + glyph->bbx.width;
ht = gy + glyph->bbx.height;
/*
* Copy the bitmap from the grid into the glyph.
*/
for (ny = 0, y = gy; y < ht; y++, ny++) {
col = gx * grid->bpp;
for (nx = 0, x = gx; x < wd; x++, nx += grid->bpp, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = grid->bitmap[(y * bpr) + (col >> 3)] & masks[si];
if (byte) {
di = (nx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
glyph->bitmap[(ny * nbpr) + (nx >> 3)] |= byte;
}
}
}
/*
* Return the new glyph.
*/
return glyph;
}
/*
* Create a bitmap with the glyph image as well as the selection.
*/
void
#ifdef __STDC__
bdf_grid_image(bdf_glyph_grid_t *grid, bdf_bitmap_t *image)
#else
bdf_grid_image(grid, image)
bdf_glyph_grid_t *grid;
bdf_bitmap_t *image;
#endif
{
short x, y, ix, iy;
unsigned short bpr, ibpr, si, di, col, colx, byte;
unsigned char *masks;
if (grid == 0 || image == 0)
return;
masks = 0;
switch (grid->bpp) {
case 1: masks = onebpp; di = 7; break;
case 2: masks = twobpp; di = 3; break;
case 4: masks = fourbpp; di = 1; break;
}
image->bpp = grid->bpp;
image->x = image->y = 0;
image->width = grid->grid_width;
image->height = grid->grid_height;
image->bytes = grid->bytes >> 1;
image->bitmap = (unsigned char *) malloc(image->bytes);
(void) memcpy((char *) image->bitmap, (char *) grid->bitmap, image->bytes);
/*
* Add the selection to the bitmap if it exists.
*/
if (grid->sel.width != 0 && grid->sel.height != 0) {
ibpr = ((image->width * grid->bpp) + 7) >> 3;
bpr = ((grid->sel.width * grid->bpp) + 7) >> 3;
for (iy = grid->sel.y, y = 0; y < grid->sel.height; y++, iy++) {
for (ix = grid->sel.x, col = x = 0; x < grid->sel.width;
x++, ix++, col += grid->bpp) {
si = (col & 7) / grid->bpp;
byte = grid->sel.bitmap[(y * bpr) + (col >> 3)] & masks[si];
if (byte) {
colx = ix * grid->bpp;
di = (colx & 7) / grid->bpp;
if (di < si)
byte <<= (si - di) * grid->bpp;
else if (di > si)
byte >>= (di - si) * grid->bpp;
image->bitmap[(iy * ibpr) + (colx >> 3)] |= byte;
}
}
}
}
}
/*
* Routines for quick and dirty dithering.
*/
static void
#ifdef __STDC__
_bdf_one_to_n(bdf_bitmap_t *bmap, int n)
#else
_bdf_one_to_n(bmap, n)
bdf_bitmap_t *bmap;
int n;
#endif
{
unsigned short bpr, sbpr, bytes, col, sx, sy;
unsigned char *nbmap, *masks;
if (bmap == 0 || bmap->width == 0 || bmap->height == 0)
return;
masks = 0;
switch (n) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
sbpr = (bmap->width + 7) >> 3;
bpr = ((bmap->width * n) + 7) >> 3;
bytes = bpr * bmap->height;
nbmap = (unsigned char *) malloc(bytes);
(void) memset((char *) nbmap, 0, bytes);
for (sy = 0; sy < bmap->height; sy++) {
for (col = sx = 0; sx < bmap->width; sx++, col += n) {
if (bmap->bitmap[(sy * sbpr) + (sx >> 3)] & (0x80 >> (sx & 7)))
nbmap[(sy * bpr) + (col >> 3)] |= masks[(col & 7) / n];
}
}
free((char *) bmap->bitmap);
bmap->bpp = n;
bmap->bytes = bytes;
bmap->bitmap = nbmap;
}
static void
#ifdef __STDC__
_bdf_n_to_one(bdf_bitmap_t *bmap)
#else
_bdf_n_to_one(bmap)
bdf_bitmap_t *bmap;
#endif
{
unsigned short bpr, sbpr, bytes, col, sx, sy;
unsigned char *nbmap, *masks;
if (bmap == 0 || bmap->width == 0 || bmap->height == 0)
return;
masks = 0;
switch (bmap->bpp) {
case 1: masks = onebpp; break;
case 2: masks = twobpp; break;
case 4: masks = fourbpp; break;
}
sbpr = ((bmap->width * bmap->bpp) + 7) >> 3;
bpr = (bmap->width + 7) >> 3;
bytes = bpr * bmap->height;
nbmap = (unsigned char *) malloc(bytes);
(void) memset((char *) nbmap, 0, bytes);
for (sy = 0; sy < bmap->height; sy++) {
for (col = sx = 0; sx < bmap->width; sx++, col += bmap->bpp) {
if (bmap->bitmap[(sy * sbpr) + (col >> 3)] &
masks[(col & 7) / bmap->bpp])
nbmap[(sy * bpr) + (sx >> 3)] |= (0x80 >> (sx & 7));
}
}
free((char *) bmap->bitmap);
bmap->bpp = 1;
bmap->bytes = bytes;
bmap->bitmap = nbmap;
}
static void
#ifdef __STDC__
_bdf_two_to_four(bdf_bitmap_t *bmap)
#else
_bdf_two_to_four(bmap)
bdf_bitmap_t *bmap;
#endif
{
unsigned short bpr, sbpr, bytes, col, si, byte, sx, sy;
unsigned char *nbmap, *masks;
if (bmap == 0 || bmap->width == 0 || bmap->height == 0)
return;
masks = twobpp;
sbpr = ((bmap->width << 1) + 7) >> 3;
bpr = ((bmap->width << 2) + 7) >> 3;
bytes = bpr * bmap->height;
nbmap = (unsigned char *) malloc(bytes);
(void) memset((char *) nbmap, 0, bytes);
for (sy = 0; sy < bmap->height; sy++) {
for (col = sx = 0; sx < bmap->width; sx++, col += 2) {
si = (col & 7) >> 1;
byte = bmap->bitmap[(sy * sbpr) + (col >> 3)] & masks[si];
if (byte) {
/*
* Shift the byte down to make an index.
*/
if (si < 3)
byte >>= (3 - si) << 1;
/*
* Scale the index to four bits per pixel and shift it into
* place before adding it.
*/
byte = (byte << 2) + 3;
if ((sx & 1) == 0)
byte <<= 4;
nbmap[(sy * bpr) + ((sx << 2) >> 3)] |= byte;
}
}
}
free((char *) bmap->bitmap);
bmap->bpp = 4;
bmap->bytes = bytes;
bmap->bitmap = nbmap;
}
static void
#ifdef __STDC__
_bdf_four_to_two(bdf_bitmap_t *bmap)
#else
_bdf_four_to_two(bmap)
bdf_bitmap_t *bmap;
#endif
{
unsigned short bpr, sbpr, bytes, col, si, byte, sx, sy;
unsigned char *nbmap, *masks;
if (bmap == 0 || bmap->width == 0 || bmap->height == 0)
return;
masks = fourbpp;
sbpr = ((bmap->width << 2) + 7) >> 3;
bpr = ((bmap->width << 1) + 7) >> 3;
bytes = bpr * bmap->height;
nbmap = (unsigned char *) malloc(bytes);
(void) memset((char *) nbmap, 0, bytes);
for (sy = 0; sy < bmap->height; sy++) {
for (col = sx = 0; sx < bmap->width; sx++, col += 4) {
si = (col & 7) >> 2;
byte = bmap->bitmap[(sy * sbpr) + (col >> 3)] & masks[si];
if (byte) {
/*
* Shift the byte down to make an index.
*/
if (si == 0)
byte >>= 4;
/*
* Scale the index to two bits per pixel and shift it into
* place if necessary.
*/
byte >>= 2;
si = ((sx << 1) & 7) >> 1;
if (si < 3)
byte <<= (3 - si) << 1;
nbmap[(sy * bpr) + ((sx << 1) >> 3)] |= byte;
}
}
}
free((char *) bmap->bitmap);
bmap->bpp = 2;
bmap->bytes = bytes;
bmap->bitmap = nbmap;
}
/*
* Add a bitmap to a grid as a selection.
*/
void
#ifdef __STDC__
bdf_add_selection(bdf_glyph_grid_t *grid, bdf_bitmap_t *sel)
#else
bdf_add_selection(grid, sel)
bdf_glyph_grid_t *grid;
bdf_bitmap_t *sel;
#endif
{
unsigned short bytes, bpr;
if (grid == 0 || sel == 0 || sel->width == 0 || sel->height == 0 ||
sel->bytes == 0)
return;
if (sel->bpp != grid->bpp) {
/*
* Dither the incoming bitmap to match the same bits per pixel as the
* grid it is being added to.
*/
if (sel->bpp == 1)
_bdf_one_to_n(sel, grid->bpp);
else if (grid->bpp == 1)
_bdf_n_to_one(sel);
else if (sel->bpp == 2)
_bdf_two_to_four(sel);
else
_bdf_four_to_two(sel);
}
/*
* If the bitmap is too big then trim the right and/or the bottom to fit
* in the grid.
*/
if (sel->width > grid->grid_width)
sel->width = grid->grid_width;
if (sel->height > grid->grid_height)
sel->height = grid->grid_height;
/*
* If the positioning puts the selection bitmap off one of the edges,
* adjust it so it is completely on the grid.
*/
if (sel->x + sel->width > grid->grid_width)
sel->x -= (sel->x + sel->width) - grid->grid_width;
if (sel->y + sel->height > grid->grid_height)
sel->y -= (sel->y + sel->height) - grid->grid_height;
bpr = ((sel->width * grid->bpp) + 7) >> 3;
bytes = (bpr * sel->height) << 1;
/*
* Resize the storage for the selection bitmap if necessary.
*/
if (bytes > grid->sel.bytes) {
if (grid->sel.bytes == 0)
grid->sel.bitmap = (unsigned char *) malloc(bytes);
else
grid->sel.bitmap = (unsigned char *)
realloc((char *) grid->sel.bitmap, bytes);
grid->sel.bytes = bytes;
}
/*
* Copy the width and height values.
*/
grid->sel.x = sel->x;
grid->sel.y = sel->y;
grid->sel.width = sel->width;
grid->sel.height = sel->height;
/*
* Copy the incoming bitmap to the new selection bitmap.
*/
(void) memcpy((char *) grid->sel.bitmap, (char *) sel->bitmap,
bytes >> 1);
/*
* Crop the image to adjust the glyph bounding box.
*/
(void) bdf_grid_crop(grid, 1);
}
int
#ifdef __STDC__
bdf_grid_color_at(bdf_glyph_grid_t *grid, short x, short y)
#else
bdf_grid_color_at(grid, x, y)
bdf_glyph_grid_t *grid;
short x, y;
#endif
{
unsigned short bpr, si, di, byte;
unsigned char *masks;
if (grid->bpp == 1)
return -1;
masks = twobpp;
di = 0;
switch (grid->bpp) {
case 2: di = 3; break;
case 4: di = 1; break;
}
x *= grid->bpp;
bpr = ((grid->grid_width * grid->bpp) + 7) >> 3;
si = (x & 7) / grid->bpp;
byte = grid->bitmap[(y * bpr) + (x >> 3)] & masks[si];
if (di > si)
byte >>= (di - si) * grid->bpp;
return (int) byte;
}