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text: faster, though not as nice, stroking method

This commit is contained in:
K. Lange 2022-04-24 19:39:14 -04:00
parent b814ef7387
commit 90cef82161
1 changed files with 24 additions and 0 deletions
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24
lib/text.c
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@ -18,6 +18,8 @@
#include <sys/types.h>
#include <sys/shm.h>
#include <math.h>
#include <toaru/graphics.h>
#include <toaru/hashmap.h>
#include <toaru/decodeutf8.h>
@ -1018,6 +1020,28 @@ char * tt_get_name_string(struct TT_Font * font, int identifier) {
return NULL;
}
struct TT_Shape * tt_contour_stroke_shape(struct TT_Contour * in, float width) {
struct TT_Contour * stroke = tt_contour_start(0,0);
for (size_t i = 0; i < in->edgeCount; ++i) {
double x_vect = in->edges[i].end.x - in->edges[i].start.x;
double y_vect = in->edges[i].end.y - in->edges[i].start.y;
double len = sqrt(x_vect * x_vect + y_vect * y_vect);
if (len == 0.0) continue;
double x_norm = (-y_vect / len) * width;
double y_norm = (x_vect / len) * width;
stroke = tt_contour_move_to(stroke, x_norm + in->edges[i].start.x, y_norm + in->edges[i].start.y);
stroke = tt_contour_line_to(stroke, x_norm + in->edges[i].end.x, y_norm + in->edges[i].end.y);
stroke = tt_contour_line_to(stroke, -x_norm + in->edges[i].end.x, -y_norm + in->edges[i].end.y);
stroke = tt_contour_line_to(stroke, -x_norm + in->edges[i].start.x, -y_norm + in->edges[i].start.y);
stroke = tt_contour_line_to(stroke, x_norm + in->edges[i].start.x, y_norm + in->edges[i].start.y);
}
struct TT_Shape * out = tt_contour_finish(stroke);
free(stroke);
return out;
}
void tt_contour_stroke_bounded(gfx_context_t * ctx, struct TT_Contour * in, uint32_t color, float width,
int x_0, int y_0, int w, int h) {
/* This is a stupid slow thing */