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139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/* GDK - The GIMP Drawing Kit
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*
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* gdkglcontextprivate.h: GL context abstraction
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*
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* Copyright © 2014 Emmanuele Bassi
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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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#pragma once
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#include <gdkenums.h>
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G_BEGIN_DECLS
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/* Version requirements for EGL contexts.
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*
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* If you add support for EGL to your backend, please require this.
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*/
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#define GDK_EGL_MIN_VERSION_MAJOR (1)
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#define GDK_EGL_MIN_VERSION_MINOR (4)
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/* Minimum OpenGL versions supported by GTK.
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* Backends should make sure to never create a context of a previous version.
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*
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* The macros refer to OpenGL; OpenGL with OPENGL_COMPATIBILITY_PROFILE_BIT as
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* OPENGL_PROFILE_MASK; and OpenGL ES respectively
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*/
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#define GDK_GL_MIN_GL_VERSION GDK_GL_VERSION_INIT (3, 2)
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#define GDK_GL_MIN_GL_LEGACY_VERSION GDK_GL_VERSION_INIT (3, 0)
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#define GDK_GL_MIN_GLES_VERSION GDK_GL_VERSION_INIT (2, 0)
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typedef struct _GdkGLVersion GdkGLVersion;
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struct _GdkGLVersion
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{
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int major;
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int minor;
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};
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#define GDK_GL_VERSION_INIT(maj,min) { maj, min }
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static const GdkGLVersion supported_gl_versions[] = {
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GDK_GL_VERSION_INIT (4, 6),
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GDK_GL_VERSION_INIT (4, 5),
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GDK_GL_VERSION_INIT (4, 4),
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GDK_GL_VERSION_INIT (4, 3),
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GDK_GL_VERSION_INIT (4, 2),
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GDK_GL_VERSION_INIT (4, 1),
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GDK_GL_VERSION_INIT (4, 0),
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GDK_GL_VERSION_INIT (3, 3),
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GDK_GL_VERSION_INIT (3, 2),
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GDK_GL_VERSION_INIT (3, 1),
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GDK_GL_VERSION_INIT (3, 0),
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GDK_GL_VERSION_INIT (0, 0)
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};
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static const GdkGLVersion supported_gles_versions[] = {
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GDK_GL_VERSION_INIT (3, 2),
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GDK_GL_VERSION_INIT (3, 1),
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GDK_GL_VERSION_INIT (3, 0),
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GDK_GL_VERSION_INIT (2, 0),
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GDK_GL_VERSION_INIT (0, 0)
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};
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#undef GDK_GL_VERSION_INIT
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#define GDK_GL_VERSION_INIT(maj,min) (GdkGLVersion) { maj, min }
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#define GDK_GL_VERSION_STRING(str) GDK_GL_VERSION_INIT(str[0] - '0', str[2] - '0')
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static inline const GdkGLVersion *
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gdk_gl_versions_get_for_api (GdkGLAPI api)
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{
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switch (api)
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{
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case GDK_GL_API_GL:
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return supported_gl_versions;
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case GDK_GL_API_GLES:
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return supported_gles_versions;
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default:
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g_assert_not_reached ();
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return NULL;
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}
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}
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static inline int
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gdk_gl_version_get_major (const GdkGLVersion *self)
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{
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return self->major;
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}
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static inline int
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gdk_gl_version_get_minor (const GdkGLVersion *self)
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{
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return self->minor;
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}
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static inline int
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gdk_gl_version_compare (const GdkGLVersion *a,
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const GdkGLVersion *b)
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{
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if (a->major > b->major)
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return 1;
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if (a->major < b->major)
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return -1;
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if (a->minor > b->minor)
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return 1;
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if (a->minor < b->minor)
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return -1;
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return 0;
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}
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static inline gboolean
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gdk_gl_version_greater_equal (const GdkGLVersion *a,
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const GdkGLVersion *b)
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{
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return gdk_gl_version_compare (a, b) >= 0;
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}
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/* in gdkglcontext.c */
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void gdk_gl_version_init_epoxy (GdkGLVersion *version);
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G_END_DECLS
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