1 /* GDK - The GIMP Drawing Kit
2  *
3  * gdkglcontextprivate.h: GL context abstraction
4  *
5  * Copyright © 2014  Emmanuele Bassi
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Library General Public
9  * License as published by the Free Software Foundation; either
10  * version 2 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Library General Public License for more details.
16  *
17  * You should have received a copy of the GNU Library General Public
18  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
19  */
20 
21 #ifndef __GDK_GL_CONTEXT_PRIVATE_H__
22 #define __GDK_GL_CONTEXT_PRIVATE_H__
23 
24 #include "gdkglcontext.h"
25 
26 G_BEGIN_DECLS
27 
28 #define GDK_GL_CONTEXT_CLASS(klass)	(G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_GL_CONTEXT, GdkGLContextClass))
29 #define GDK_IS_GL_CONTEXT_CLASS(klass)	(G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_GL_CONTEXT))
30 #define GDK_GL_CONTEXT_GET_CLASS(obj)	(G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_GL_CONTEXT, GdkGLContextClass))
31 
32 typedef struct _GdkGLContextClass       GdkGLContextClass;
33 
34 struct _GdkGLContext
35 {
36   GObject parent_instance;
37 };
38 
39 struct _GdkGLContextClass
40 {
41   GObjectClass parent_class;
42 
43   gboolean (* realize) (GdkGLContext *context,
44                         GError **error);
45 
46   void (* end_frame)    (GdkGLContext *context,
47                          cairo_region_t *painted,
48                          cairo_region_t *damage);
49   gboolean (* texture_from_surface) (GdkGLContext    *context,
50                                      cairo_surface_t *surface,
51                                      cairo_region_t  *region);
52 };
53 
54 typedef struct {
55   guint program;
56   guint position_location;
57   guint uv_location;
58   guint map_location;
59   guint flip_location;
60 } GdkGLContextProgram;
61 
62 typedef struct {
63   guint vertex_array_object;
64   guint tmp_framebuffer;
65   guint tmp_vertex_buffer;
66 
67   GdkGLContextProgram texture_2d_quad_program;
68   GdkGLContextProgram texture_rect_quad_program;
69 
70   GdkGLContextProgram *current_program;
71 
72   guint is_legacy : 1;
73   guint use_es : 1;
74 } GdkGLContextPaintData;
75 
76 void                    gdk_gl_context_set_is_legacy            (GdkGLContext    *context,
77                                                                  gboolean         is_legacy);
78 
79 void                    gdk_gl_context_upload_texture           (GdkGLContext    *context,
80                                                                  cairo_surface_t *image_surface,
81                                                                  int              width,
82                                                                  int              height,
83                                                                  guint            texture_target);
84 GdkGLContextPaintData * gdk_gl_context_get_paint_data           (GdkGLContext    *context);
85 gboolean                gdk_gl_context_use_texture_rectangle    (GdkGLContext    *context);
86 gboolean                gdk_gl_context_has_framebuffer_blit     (GdkGLContext    *context);
87 gboolean                gdk_gl_context_has_frame_terminator     (GdkGLContext    *context);
88 gboolean                gdk_gl_context_has_unpack_subimage      (GdkGLContext    *context);
89 void                    gdk_gl_context_end_frame                (GdkGLContext    *context,
90                                                                  cairo_region_t  *painted,
91                                                                  cairo_region_t  *damage);
92 
93 G_END_DECLS
94 
95 #endif /* __GDK_GL_CONTEXT_PRIVATE_H__ */
96