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f90fb68aec
We are using so many internal extra features that it is no longer a good idea to use these functions. And they aren't really used anyway. These extra features are also constantly in flux and rely on internal APIs, so exposing them would just cause extra pain.
98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/* GDK - The GIMP Drawing Kit
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*
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* gdkcairocontext.c: Cairo wrappers
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*
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* Copyright © 2018 Benjamin Otte
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gdkcairocontext.h"
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#include "gdkcairocontextprivate.h"
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#include "gdkcairo.h"
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/**
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* GdkCairoContext:
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*
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* `GdkCairoContext` is an object representing the platform-specific
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* draw context.
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*
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* `GdkCairoContext`s are created for a surface using
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* [method@Gdk.Surface.create_cairo_context], and the context
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* can then be used to draw on that surface.
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*/
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typedef struct _GdkCairoContextPrivate GdkCairoContextPrivate;
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struct _GdkCairoContextPrivate {
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gpointer unused;
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};
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G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GdkCairoContext, gdk_cairo_context, GDK_TYPE_DRAW_CONTEXT,
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G_ADD_PRIVATE (GdkCairoContext))
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static void
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gdk_cairo_context_class_init (GdkCairoContextClass *klass)
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{
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}
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static void
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gdk_cairo_context_init (GdkCairoContext *self)
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{
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}
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/**
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* gdk_cairo_context_cairo_create:
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* @self: a `GdkCairoContext` that is currently drawing
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*
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* Retrieves a Cairo context to be used to draw on the `GdkSurface`
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* of @context.
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*
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* A call to [method@Gdk.DrawContext.begin_frame] with this
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* @context must have been done or this function will return %NULL.
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*
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* The returned context is guaranteed to be valid until
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* [method@Gdk.DrawContext.end_frame] is called.
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*
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* Returns: (transfer full) (nullable): a Cairo context
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* to draw on `GdkSurface
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*/
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cairo_t *
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gdk_cairo_context_cairo_create (GdkCairoContext *self)
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{
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GdkDrawContext *draw_context;
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cairo_t *cr;
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g_return_val_if_fail (GDK_IS_CAIRO_CONTEXT (self), NULL);
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draw_context = GDK_DRAW_CONTEXT (self);
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G_GNUC_BEGIN_IGNORE_DEPRECATIONS
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if (!gdk_draw_context_is_in_frame (draw_context))
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return NULL;
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G_GNUC_END_IGNORE_DEPRECATIONS
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cr = GDK_CAIRO_CONTEXT_GET_CLASS (self)->cairo_create (self);
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gdk_cairo_region (cr, gdk_draw_context_get_frame_region (draw_context));
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cairo_clip (cr);
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return cr;
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}
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