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js: Add a new function whereby C can ask JS for a preferred board size

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Currently JS has no opinion.
This commit is contained in:
Ben Harris
2022-10-29 21:45:11 +01:00
parent 14eb35da4a
commit 33b5c48429
2 changed files with 18 additions and 1 deletions
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5
emcc.c
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@ -83,6 +83,7 @@ extern void js_canvas_copy_to_blitter(int id, int x, int y, int w, int h);
extern void js_canvas_copy_from_blitter(int id, int x, int y, int w, int h);
extern void js_canvas_remove_statusbar(void);
extern void js_canvas_set_statusbar(const char *text);
extern bool js_canvas_get_preferred_size(int *wp, int *hp);
extern void js_canvas_set_size(int w, int h);
extern double js_get_device_pixel_ratio();
@ -192,8 +193,10 @@ static int canvas_w, canvas_h;
static void resize()
{
int w, h;
bool user;
w = h = INT_MAX;
midend_size(me, &w, &h, false, js_get_device_pixel_ratio());
user = js_canvas_get_preferred_size(&w, &h);
midend_size(me, &w, &h, user, js_get_device_pixel_ratio());
js_canvas_set_size(w, h);
canvas_w = w;
canvas_h = h;

14
emcclib.js
View File

@ -563,6 +563,20 @@ mergeInto(LibraryManager.library, {
statusbar.textContent = UTF8ToString(ptr);
},
/*
* bool js_canvas_get_preferred_size(int *wp, int *hp);
*
* This is called before calling midend_size() to set a puzzle to
* the default size. If the JavaScript layer has an opinion about
* how big the puzzle should be, it can overwrite *wp and *hp with
* its preferred size, and return true if the "user" parameter to
* midend_size() should be true. Otherwise it should leave them
* alone and return false.
*/
js_canvas_get_preferred_size: function(wp, hp) {
return false;
},
/*
* void js_canvas_set_size(int w, int h);
*