forked from AuroraMiddleware/gtk
813e9c95fb
And make the GdkCairoContext as abstract. The idea of this and thje following commits is to get rid of all Cairo code in gdksurface.c (and $backend/gdksurface-$backend.c) by moving that code into the Cairo context files. In particular, the GdkSurfaceClass.begin_frame/end_frame() functions (which are currently exclusively used by the Cairo code should end up being moved to GdkDrawContextClass.begin/end_frame(). This has multiple benefits: 1. It unifies code between the different drawing contexts. GL lives in GLContext, Vulkan in VulkanContext and Cairo in CairoContext. In turn, this makes it way easier to reason about what's going on in surface-specific code. Currently pretty much all backends do things wrong when they want to sync to drawing or to the frame clock. 2. It makes the API of GdkSurface smaller. No drawing code (apart from creating the contexts) needs to remain. 3. It confines Cairo to the Drawcontext, thereby making it way more obvious when backends are still using it in situations where it may now conflict with OpenGL (like when doing the dnd failed animation or in the APIs that I'm removing in this branch). 4. We have 2 very different types of Cairo contexts: The X/win32 model, where we have a natively supported Cairo backend but do double buffering ourselves and use similar surfaces and the Wayland/Broadway model where we use image surfaces without any Cairo backend support and have to submit the buffers manually. By not sharing code between those 2 versions, we can make the actual code way smaller. We also get around the need to create 1x1 image surfaces in the Wayland backend where we pretend there's a native Cairo surface.
54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/* GDK - The GIMP Drawing Kit
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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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#ifndef __GDK_WIN32_CAIRO_CONTEXT__
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#define __GDK_WIN32_CAIRO_CONTEXT__
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#include "gdkconfig.h"
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#include "gdkcairocontextprivate.h"
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G_BEGIN_DECLS
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#define GDK_TYPE_WIN32_CAIRO_CONTEXT (gdk_win32_cairo_context_get_type ())
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#define GDK_WIN32_CAIRO_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GDK_TYPE_WIN32_CAIRO_CONTEXT, GdkWin32CairoContext))
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#define GDK_IS_WIN32_CAIRO_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GDK_TYPE_WIN32_CAIRO_CONTEXT))
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#define GDK_WIN32_CAIRO_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_WIN32_CAIRO_CONTEXT, GdkWin32CairoContextClass))
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#define GDK_IS_WIN32_CAIRO_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_WIN32_CAIRO_CONTEXT))
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#define GDK_WIN32_CAIRO_CONTEXT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_WIN32_CAIRO_CONTEXT, GdkWin32CairoContextClass))
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typedef struct _GdkWin32CairoContext GdkWin32CairoContext;
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typedef struct _GdkWin32CairoContextClass GdkWin32CairoContextClass;
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struct _GdkWin32CairoContext
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{
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GdkCairoContext parent_instance;
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};
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struct _GdkWin32CairoContextClass
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{
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GdkCairoContextClass parent_class;
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};
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GDK_AVAILABLE_IN_ALL
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GType gdk_win32_cairo_context_get_type (void) G_GNUC_CONST;
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G_END_DECLS
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#endif /* __GDK_WIN32_CAIRO_CONTEXT__ */
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