cdCtxCanvas *cdgdkCreateCanvas(cdCanvas* canvas, GdkDrawable* wnd, GdkScreen* scr, GdkVisual* vis)
{
cdCtxCanvas *ctxcanvas = (cdCtxCanvas *)malloc(sizeof(cdCtxCanvas));
memset(ctxcanvas, 0, sizeof(cdCtxCanvas));
ctxcanvas->scr = scr;
ctxcanvas->vis = vis;
ctxcanvas->wnd = wnd;
ctxcanvas->gc = gdk_gc_new(wnd);
if (!ctxcanvas->gc)
{
free(canvas);
return NULL;
}
ctxcanvas->fontcontext = gdk_pango_context_get();
#if PANGO_VERSION_CHECK(1,16,0)
pango_context_set_language(ctxcanvas->fontcontext, pango_language_get_default());
#endif
ctxcanvas->canvas = canvas;
canvas->ctxcanvas = ctxcanvas;
gdk_drawable_get_size(wnd, &ctxcanvas->canvas->w, &ctxcanvas->canvas->h);
ctxcanvas->depth = gdk_drawable_get_depth(wnd);
canvas->bpp = ctxcanvas->depth;
canvas->xres = ((double)gdk_screen_get_width(scr) / (double)gdk_screen_get_width_mm(scr));
canvas->yres = ((double)gdk_screen_get_height(scr) / (double)gdk_screen_get_height_mm(scr));
canvas->w_mm = ((double)canvas->w) / canvas->xres;
canvas->h_mm = ((double)canvas->h) / canvas->yres;
canvas->invert_yaxis = 1;
if (canvas->bpp <= 8)
{
ctxcanvas->colormap = gdk_gc_get_colormap(ctxcanvas->gc);
if (!ctxcanvas->colormap)
{
ctxcanvas->colormap = gdk_colormap_get_system();
gdk_gc_set_colormap(ctxcanvas->gc, ctxcanvas->colormap);
}
ctxcanvas->num_colors = ctxcanvas->colormap->size;
}
cdRegisterAttribute(canvas, &gc_attrib);
cdRegisterAttribute(canvas, &rotate_attrib);
cdRegisterAttribute(canvas, &pangoversion_attrib);
cdRegisterAttribute(canvas, &imgdither_attrib);
cdRegisterAttribute(canvas, &interp_attrib);
return ctxcanvas;
}
static void cdpalette(cdCtxCanvas *ctxcanvas, int n, const long int *palette, int mode)
{
int i;
GdkColor clr;
if (mode == CD_FORCE)
{
/* if was POLITE then allocates own palette */
if (ctxcanvas->colormap == gdk_gc_get_colormap(ctxcanvas->gc))
ctxcanvas->colormap = gdk_colormap_new(ctxcanvas->vis, FALSE);
/* allocate all the palette colors to the CD */
for (i = 0; i < n; i++)
{
clr = cdColorToGdk(palette[i]);
gdk_colormap_alloc_color(ctxcanvas->colormap, &clr, FALSE, FALSE);
}
/* set directly on the drawable */
gdk_drawable_set_colormap(ctxcanvas->wnd, ctxcanvas->colormap);
}
else
{
/* if was FORCE, remove the own palette */
if (ctxcanvas->colormap != gdk_gc_get_colormap(ctxcanvas->gc))
{
g_object_unref(ctxcanvas->colormap);
ctxcanvas->colormap = gdk_gc_get_colormap(ctxcanvas->gc);
}
/* if POLITE then just try to allocate all the colors of the palette */
for (i = 0; i < n; i++)
{
clr = cdColorToGdk(palette[i]);
gdk_colormap_alloc_color(ctxcanvas->colormap, &clr, FALSE, TRUE);
}
}
}
void cdgdkKillCanvas(cdCtxCanvas *ctxcanvas)
{
if (ctxcanvas->canvas->bpp <= 8)
{
if (ctxcanvas->colormap != gdk_gc_get_colormap(ctxcanvas->gc))
g_object_unref(ctxcanvas->colormap);
}
if (ctxcanvas->last_hatch) g_object_unref(ctxcanvas->last_hatch);
if (ctxcanvas->fontdesc) pango_font_description_free(ctxcanvas->fontdesc);
if (ctxcanvas->fontlayout) g_object_unref(ctxcanvas->fontlayout);
if (ctxcanvas->fontcontext) g_object_unref(ctxcanvas->fontcontext);
if (ctxcanvas->new_rgn) gdk_region_destroy(ctxcanvas->new_rgn);
if (ctxcanvas->clip_rgn) gdk_region_destroy(ctxcanvas->clip_rgn);
if (ctxcanvas->last_pattern)
{
g_object_unref(ctxcanvas->last_pattern_gc);
g_object_unref(ctxcanvas->last_pattern);
}
if (ctxcanvas->last_stipple)
{
g_object_unref(ctxcanvas->last_stipple_gc);
g_object_unref(ctxcanvas->last_stipple);
}
if (ctxcanvas->strLastConvertUTF8)
g_free(ctxcanvas->strLastConvertUTF8);
g_object_unref(ctxcanvas->gc);
free(ctxcanvas);
}
static VALUE
rg_colormap(VALUE self)
{
return GOBJ2RVAL(gdk_gc_get_colormap(_SELF(self)));
}
