tDraw glyphs in correct order - ltkx - GUI toolkit for X11 (WIP)
HTML git clone git://lumidify.org/ltkx.git
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DIR Files
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DIR LICENSE
---
DIR commit 86a8baae96e3e352e7486bb8f61584be42339e15
DIR parent a6128237108e74682b8ca427a01dd6762cb95891
HTML Author: lumidify <nobody@lumidify.org>
Date: Sun, 17 May 2020 20:02:34 +0200
Draw glyphs in correct order
This will be needed for efficiently determining which glyph corresponds
tto the location a user clicked.
Diffstat:
M text_buffer.c | 60 +++++++++++++++----------------
1 file changed, 29 insertions(+), 31 deletions(-)
---
DIR diff --git a/text_buffer.c b/text_buffer.c
t@@ -200,6 +200,7 @@ ltk_create_ximage(Display *dpy, int w, int h, int depth, XColor bg) {
/* based on http://codemadness.org/git/dwm-font/file/drw.c.html#l315 */
void
ltk_draw_glyph(LtkGlyph *glyph, XImage *img, int x, int y, XColor fg) {
+ printf("%d,%d\n", x, y);
double a;
int b;
for (int i = 0; i < glyph->info->h; i++) {
t@@ -244,55 +245,52 @@ ltk_render_text_line_new(
int cur_border = par_is_rtl ? sl->w : 0;
while (cur && cur_len < sl->len) {
int start_index;
- /* FIXME: the borders here aren't correct since they are
- x_abs + glyph->info->w, which may not be the same thing
- as the actual x_abs of the bordering glyph */
if (cur->dir == HB_DIRECTION_RTL) {
start_index = cur == sl->run ? sl->glyph_index : cur->num_glyphs - 1;
int local_border = cur->glyphs[start_index].x_abs + cur->glyphs[start_index].x_advance;
int end_index;
- if (start_index + 1 < sl->len - cur_len) {
+ if (start_index + 1 < sl->len - cur_len)
end_index = 0;
- } else {
+ else
end_index = start_index - (sl->len - cur_len) + 1;
- }
- for (int i = start_index; i >= 0 && cur_len < sl->len; i--) {
- cur_len++;
- int x;
- if (par_is_rtl) {
- x = cur_border - (local_border - cur->glyphs[i].x_abs);
- } else {
- x = cur_border + (cur->glyphs[i].x_abs - cur->glyphs[end_index].x_abs);
+ if (par_is_rtl) {
+ for (int i = start_index; i >= 0 && cur_len < sl->len; i--) {
+ cur_len++;
+ int x = cur_border - (local_border - cur->glyphs[i].x_abs);
+ ltk_draw_glyph(&cur->glyphs[i], sl->img, x, cur->glyphs[i].y_abs, fg);
}
- ltk_draw_glyph(&cur->glyphs[i], sl->img, x, cur->glyphs[i].y_abs, fg);
- }
- if (par_is_rtl)
cur_border -= local_border - cur->glyphs[0].x_abs;
- else
+ } else {
+ for (int i = end_index; i < cur->num_glyphs && cur_len < sl->len; i++) {
+ cur_len++;
+ int x = cur_border + (cur->glyphs[i].x_abs - cur->glyphs[end_index].x_abs);
+ ltk_draw_glyph(&cur->glyphs[i], sl->img, x, cur->glyphs[i].y_abs, fg);
+ }
cur_border += local_border - cur->glyphs[0].x_abs;
+ }
} else {
start_index = cur == sl->run ? sl->glyph_index : 0;
int local_border = cur->glyphs[start_index].x_abs;
int end_index;
- if (cur->num_glyphs - start_index < sl->len - cur_len) {
+ if (cur->num_glyphs - start_index < sl->len - cur_len)
end_index = cur->num_glyphs - 1;
- } else {
+ else
end_index = start_index + sl->len - cur_len - 1;
- }
- for (int i = start_index; i < cur->num_glyphs && cur_len < sl->len; i++) {
- cur_len++;
- int x;
- if (par_is_rtl) {
- x = cur_border - (cur->glyphs[end_index].x_abs + cur->glyphs[end_index].x_advance - cur->glyphs[i].x_abs);
- } else {
- x = cur_border + (cur->glyphs[i].x_abs - local_border);
+ if (par_is_rtl) {
+ for (int i = end_index; i >= 0 && cur_len < sl->len; i--) {
+ cur_len++;
+ int x = cur_border - (cur->glyphs[end_index].x_abs + cur->glyphs[end_index].x_advance - cur->glyphs[i].x_abs);
+ ltk_draw_glyph(&cur->glyphs[i], sl->img, x, cur->glyphs[i].y_abs, fg);
}
- ltk_draw_glyph(&cur->glyphs[i], sl->img, x, cur->glyphs[i].y_abs, fg);
- }
- if (par_is_rtl)
cur_border -= cur->glyphs[cur->num_glyphs - 1].x_abs + cur->glyphs[cur->num_glyphs - 1].x_advance - local_border;
- else
+ } else {
+ for (int i = start_index; i < cur->num_glyphs && cur_len < sl->len; i++) {
+ cur_len++;
+ int x = cur_border + (cur->glyphs[i].x_abs - local_border);
+ ltk_draw_glyph(&cur->glyphs[i], sl->img, x, cur->glyphs[i].y_abs, fg);
+ }
cur_border += cur->glyphs[cur->num_glyphs - 1].x_abs + cur->glyphs[cur->num_glyphs - 1].x_advance - local_border;
+ }
}
cur = par_is_rtl ? cur->last : cur->next;
}