61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
// 29 june 2016
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#include "uipriv_unix.h"
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// functions FROM THE FUTURE!
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// in some cases, because being held back by LTS releases sucks :/
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// in others, because parts of GTK+ being unstable until recently also sucks :/
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// added in pango 1.38; we need 1.36
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static PangoAttribute *(*newFeaturesAttr)(const gchar *features) = NULL;
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static PangoAttribute *(*newFGAlphaAttr)(guint16 alpha) = NULL;
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static PangoAttribute *(*newBGAlphaAttr)(guint16 alpha) = NULL;
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// added in GTK+ 3.20; we need 3.10
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static void (*gwpIterSetObjectName)(GtkWidgetPath *path, gint pos, const char *name) = NULL;
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// note that we treat any error as "the symbols aren't there" (and don't care if dlclose() failed)
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void loadFutures(void)
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{
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void *handle;
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// dlsym() walks the dependency chain, so opening the current process should be sufficient
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handle = dlopen(NULL, RTLD_LAZY);
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if (handle == NULL)
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return;
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#define GET(var, fn) *((void **) (&var)) = dlsym(handle, #fn)
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GET(newFeaturesAttr, pango_attr_font_features_new);
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GET(newFGAlphaAttr, pango_attr_foreground_alpha_new);
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GET(newBGAlphaAttr, pango_attr_background_alpha_new);
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GET(gwpIterSetObjectName, gtk_widget_path_iter_set_object_name);
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dlclose(handle);
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}
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PangoAttribute *FUTURE_pango_attr_font_features_new(const gchar *features)
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{
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if (newFeaturesAttr == NULL)
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return NULL;
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return (*newFeaturesAttr)(features);
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}
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PangoAttribute *FUTURE_pango_attr_foreground_alpha_new(guint16 alpha)
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{
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if (newFGAlphaAttr == NULL)
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return NULL;
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return (*newFGAlphaAttr)(alpha);
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}
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PangoAttribute *FUTURE_pango_attr_background_alpha_new(guint16 alpha)
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{
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if (newBGAlphaAttr == NULL)
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return NULL;
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return (*newBGAlphaAttr)(alpha);
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}
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gboolean FUTURE_gtk_widget_path_iter_set_object_name(GtkWidgetPath *path, gint pos, const char *name)
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{
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if (gwpIterSetObjectName == NULL)
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return FALSE;
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(*gwpIterSetObjectName)(path, pos, name);
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return TRUE;
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}
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