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[twin] Implement stretch

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This commit is contained in:
Behdad Esfahbod 2008-12-24 16:13:12 -05:00
parent 0656e947f1
commit 6767673961
1 changed files with 21 additions and 6 deletions
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27
src/cairo-font-face-twin.c
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@ -286,7 +286,9 @@ twin_scaled_font_render_glyph (cairo_scaled_font_t *scaled_font,
const int8_t *b;
const int8_t *g;
int8_t w;
double gw;
double lw;
double stretch;
struct {
cairo_bool_t snap;
@ -308,6 +310,7 @@ twin_scaled_font_render_glyph (cairo_scaled_font_t *scaled_font,
props = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
&twin_face_properties_key);
/* weight */
lw = props->weight * (5.5 / 64 / TWIN_WEIGHT_NORMAL);
cairo_set_line_width (cr, lw);
@ -319,24 +322,36 @@ twin_scaled_font_render_glyph (cairo_scaled_font_t *scaled_font,
CAIRO_LINE_CAP_SQUARE : */
CAIRO_LINE_CAP_ROUND);
/* stretch */
stretch = 1 + .05 * ((int) props->stretch - (int) TWIN_STRETCH_NORMAL);
cairo_scale (cr, stretch, 1);
/* lock pen matrix */
cairo_save (cr);
/* left margin */
cairo_translate (cr, lw, 0);
/* slant */
if (props->slant != CAIRO_FONT_SLANT_NORMAL) {
cairo_matrix_t shear = { 1, 0, -.2, 1, 0, 0};
cairo_transform (cr, &shear);
}
cairo_translate (cr, lw, 0); /* for margin */
gw = FX(w);
cairo_save (cr);
if (props->monospace) {
int8_t monow = 24;
cairo_scale (cr, (FX(monow)+lw) / (FX(w)+lw), 1.);
w = monow;
double monow = FX(24);
cairo_scale (cr, (monow+lw) / (gw+lw), 1);
gw = monow;
}
cairo_translate (cr, lw * .5, 0); /* for pen width */
metrics->x_advance = FX(w) + lw;
metrics->x_advance = gw + lw;
metrics->x_advance += 2 * lw /* XXX 2*x.margin */;
metrics->x_advance *= stretch;
if (info.snap)
metrics->x_advance = SNAPI (SNAPX (metrics->x_advance));