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sixel: wip: maintain a list of finished, and "active" sixel images

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In unhook, add the generated image to a list of finished sixel images,
along with positioning and size information.

When rendering, loop this list of images, and render the images (or
parts of) that are visible.

When scrolling, check if any part of the images cover the re-cycled
lines, and if so, remove the *entire* image from the list.

This means we have the following limitations:

* The renderer always renders the whole (visible area of) the
  image(s). There are times when this isn't necessary - for example,
  when the image is scrolled inside the visible area.
* It would be nice if we could crop the image when parts of it is
  scrolled out.
This commit is contained in:
Daniel Eklöf 2020-02-21 23:40:35 +01:00
parent f81bdfeed5
commit f0fc82f098
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GPG key ID: 5BBD4992C116573F
4 changed files with 122 additions and 38 deletions
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65
render.c
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@ -816,25 +816,66 @@ grid_render(struct terminal *term)
cols_updated * term->cell_width, term->cell_height);
}
if (term->sixel.pix != NULL) {
tll_foreach(term->sixel_images, it) {
int first_visible_row = -1;
if (view_end >= term->grid->view) {
/* Not wrapped */
for (size_t i = it->item.pos.row;
i < it->item.pos.row + (it->item.height + term->cell_height - 1) / term->cell_height;
i++)
{
int row = i & (term->grid->num_rows - 1);
if (row >= term->grid->view && row <= view_end) {
first_visible_row = i;
break;
}
}
} else {
/* Wrapped */
for (size_t i = it->item.pos.row;
i < it->item.pos.row + (it->item.height + term->cell_height - 1) / term->cell_height;
i++)
{
int row = i & (term->grid->num_rows - 1);
if (row >= term->grid->view || row <= view_end) {
first_visible_row = i;
break;
}
}
}
if (first_visible_row < 0)
continue;
const int first_img_row = first_visible_row - it->item.pos.row;
const int row = first_visible_row & (term->grid->num_rows - 1);
const int view_aligned =
(row - term->grid->view + term->grid->num_rows) & (term->grid->num_rows - 1);
const int x = term->x_margin + it->item.pos.col * term->cell_width;
const int y = max(term->y_margin, term->y_margin + view_aligned * term->cell_height);
const int width = min(it->item.width, term->width - x - term->x_margin);
const int height = min(
it->item.height - first_img_row * term->cell_height,
term->height - y - term->y_margin);
//LOG_INFO("x=%d, y=%d, width=%d, height=%d", x, y, width, height);
pixman_image_composite(
PIXMAN_OP_SRC,
term->sixel.pix,
it->item.pix,
NULL,
pix,
0, first_img_row * term->cell_height,
0, 0,
0, 0,
0, 0,
term->sixel.max_col,
term->sixel.row * 6);
x, y,
width, height);
wl_surface_damage_buffer(
term->window->surface,
0, 0, term->sixel.max_col, term->sixel.row * 6);
pixman_image_unref(term->sixel.pix);
free(term->sixel.image);
term->sixel.pix = NULL;
term->sixel.image = NULL;
x, y, width, height);
}
if (term->flash.active) {