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/* GDK - The GIMP Drawing Kit
*
* gdkglcontextprivate.h: GL context abstraction
*
* Copyright © 2014 Emmanuele Bassi
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __GDK_GL_CONTEXT_PRIVATE_H__
#define __GDK_GL_CONTEXT_PRIVATE_H__
#include "gdkglcontext.h"
#include "gdkdrawcontextprivate.h"
G_BEGIN_DECLS
/* Version requirements for EGL contexts.
*
* If you add support for EGL to your backend, please require this.
*/
#define GDK_EGL_MIN_VERSION_MAJOR (1)
#define GDK_EGL_MIN_VERSION_MINOR (4)
/* Minimum OpenGL versions supported by GTK.
* Backends should make sure to never create a context of a previous version.
*
* The macros refer to OpenGL; OpenGL with OPENGL_COMPATIBILITY_PROFILE_BIT as
* OPENGL_PROFILE_MASK; and OpenGL ES respectively
*/
#define GDK_GL_MIN_GL_VERSION_MAJOR (3)
#define GDK_GL_MIN_GL_VERSION_MINOR (2)
#define GDK_GL_MIN_GL_LEGACY_VERSION_MAJOR (3)
#define GDK_GL_MIN_GL_LEGACY_VERSION_MINOR (0)
#define GDK_GL_MIN_GLES_VERSION_MAJOR (2)
#define GDK_GL_MIN_GLES_VERSION_MINOR (0)
typedef enum {
GDK_GL_NONE = 0,
GDK_GL_EGL,
GDK_GL_GLX,
GDK_GL_WGL,
GDK_GL_CGL
} GdkGLBackend;
#define GDK_GL_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_GL_CONTEXT, GdkGLContextClass))
#define GDK_IS_GL_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_GL_CONTEXT))
#define GDK_GL_CONTEXT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_GL_CONTEXT, GdkGLContextClass))
typedef struct _GdkGLContextClass GdkGLContextClass;
struct _GdkGLContext
{
GdkDrawContext parent_instance;
/* We store the old drawn areas to support buffer-age optimizations */
cairo_region_t *old_updated_area[2];
};
struct _GdkGLContextClass
{
GdkDrawContextClass parent_class;
GdkGLBackend backend_type;
GdkGLAPI (* realize) (GdkGLContext *context,
GError **error);
gboolean (* make_current) (GdkGLContext *context,
gboolean surfaceless);
gboolean (* clear_current) (GdkGLContext *context);
gboolean (* is_current) (GdkGLContext *context);
cairo_region_t * (* get_damage) (GdkGLContext *context);
gboolean (* is_shared) (GdkGLContext *self,
GdkGLContext *other);
guint (* get_default_framebuffer) (GdkGLContext *self);
};
typedef struct {
guint program;
guint position_location;
guint uv_location;
guint map_location;
guint flip_location;
} GdkGLContextProgram;
typedef struct {
guint tmp_framebuffer;
guint tmp_vertex_buffer;
GdkGLContextProgram texture_2d_quad_program;
GdkGLContextProgram texture_rect_quad_program;
GdkGLContextProgram *current_program;
guint is_legacy : 1;
guint use_es : 1;
} GdkGLContextPaintData;
gboolean gdk_gl_backend_can_be_used (GdkGLBackend backend_type,
GError **error);
void gdk_gl_backend_use (GdkGLBackend backend_type);
void gdk_gl_context_clear_current_if_surface (GdkSurface *surface);
GdkGLContext * gdk_gl_context_new (GdkDisplay *display,
GdkSurface *surface);
gboolean gdk_gl_context_is_api_allowed (GdkGLContext *self,
GdkGLAPI api,
GError **error);
void gdk_gl_context_set_is_legacy (GdkGLContext *context,
gboolean is_legacy);
gboolean gdk_gl_context_check_version (GdkGLContext *context,
int required_gl_major,
int required_gl_minor,
int required_gles_major,
int required_gles_minor);
void gdk_gl_context_get_clipped_version (GdkGLContext *context,
int min_major,
int min_minor,
int *major,
int *minor);
void gdk_gl_context_get_matching_version (GdkGLAPI api,
gboolean legacy,
int *major,
int *minor);
gboolean gdk_gl_context_has_unpack_subimage (GdkGLContext *context);
void gdk_gl_context_push_debug_group (GdkGLContext *context,
const char *message);
void gdk_gl_context_push_debug_group_printf (GdkGLContext *context,
const char *format,
...) G_GNUC_PRINTF (2, 3);
void gdk_gl_context_pop_debug_group (GdkGLContext *context);
void gdk_gl_context_label_object (GdkGLContext *context,
guint identifier,
guint name,
const char *label);
void gdk_gl_context_label_object_printf (GdkGLContext *context,
guint identifier,
guint name,
const char *format,
...) G_GNUC_PRINTF (4, 5);
gboolean gdk_gl_context_has_debug (GdkGLContext *self) G_GNUC_PURE;
gboolean gdk_gl_context_use_es_bgra (GdkGLContext *context);
gboolean gdk_gl_context_has_vertex_half_float (GdkGLContext *self) G_GNUC_PURE;
G_END_DECLS
#endif /* __GDK_GL_CONTEXT_PRIVATE_H__ */
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