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/* GDK - The GIMP Drawing Kit
*
* gdkmirglcontext.c: Mir specific OpenGL wrappers
*
* Copyright © 2014 Canonical Ltd
*
* 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/>.
*/
#include "config.h"
#include "gdkmir-private.h"
#include "gdkinternals.h"
#include "gdkintl.h"
G_DEFINE_TYPE (GdkMirGLContext, gdk_mir_gl_context, GDK_TYPE_GL_CONTEXT)
#define N_EGL_ATTRS 16
static gboolean
gdk_mir_gl_context_realize (GdkGLContext *context,
GError **error)
{
GdkMirGLContext *context_mir = GDK_MIR_GL_CONTEXT (context);
GdkDisplay *display = gdk_gl_context_get_display (context);
GdkGLContext *share = gdk_gl_context_get_shared_context (context);
EGLContext ctx;
EGLint context_attribs[N_EGL_ATTRS];
int major, minor, flags;
gboolean debug_bit, forward_bit;
int i = 0;
if (!_gdk_mir_display_init_egl_display (display))
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("No GL implementation is available"));
return FALSE;
}
gdk_gl_context_get_required_version (context, &major, &minor);
debug_bit = gdk_gl_context_get_debug_enabled (context);
forward_bit = gdk_gl_context_get_forward_compatible (context);
flags = 0;
if (debug_bit)
flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
if (forward_bit)
flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
/* We want a core profile */
context_attribs[i++] = EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR;
context_attribs[i++] = EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
/* Specify the version */
context_attribs[i++] = EGL_CONTEXT_MAJOR_VERSION_KHR;
context_attribs[i++] = major;
context_attribs[i++] = EGL_CONTEXT_MINOR_VERSION_KHR;
context_attribs[i++] = minor;
/* Specify the flags */
context_attribs[i++] = EGL_CONTEXT_FLAGS_KHR;
context_attribs[i++] = flags;
context_attribs[i++] = EGL_NONE;
g_assert (i < N_EGL_ATTRS);
ctx = eglCreateContext (_gdk_mir_display_get_egl_display (display),
context_mir->egl_config,
share != NULL ? GDK_MIR_GL_CONTEXT (share)->egl_context
: EGL_NO_CONTEXT,
context_attribs);
if (ctx == NULL)
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,
_("Unable to create a GL context"));
return FALSE;
}
GDK_NOTE (OPENGL, g_print ("Created EGL context[%p]\n", ctx));
context_mir->egl_context = ctx;
return TRUE;
}
static cairo_region_t *
gdk_mir_gl_context_get_damage (GdkGLContext *context)
{
GdkDisplay *display = gdk_draw_context_get_display (GDK_DRAW_CONTEXT (context));
EGLSurface egl_surface;
GdkWindow *window = gdk_draw_context_get_window (GDK_DRAW_CONTEXT (context));
int buffer_age = 0;
if (_gdk_mir_display_have_egl_buffer_age (display))
{
GdkGLContext *shared;
GdkMirGLContext *shared_mir;
shared = gdk_gl_context_get_shared_context (context);
if (shared == NULL)
shared = context;
shared_mir = GDK_MIR_GL_CONTEXT (shared);
egl_surface = _gdk_mir_window_get_egl_surface (window, shared_mir->egl_config);
gdk_gl_context_make_current (shared);
eglQuerySurface (_gdk_mir_display_get_egl_display (display), egl_surface,
EGL_BUFFER_AGE_EXT, &buffer_age);
if (buffer_age >= 2)
{
if (window->old_updated_area[0])
return cairo_region_copy (window->old_updated_area[0]);
}
else if (buffer_age >= 3)
{
if (window->old_updated_area[0] &&
window->old_updated_area[1])
{
cairo_region_t *damage = cairo_region_copy (window->old_updated_area[0]);
cairo_region_union (damage, window->old_updated_area[1]);
return damage;
}
}
}
return GDK_GL_CONTEXT_CLASS (gdk_mir_gl_context_parent_class)->get_damage (context);
}
static void
gdk_mir_gl_context_end_frame (GdkDrawContext *context,
cairo_region_t *painted,
cairo_region_t *damage)
{
GdkGLContext *gl_context = GDK_GL_CONTEXT (context);
GdkMirGLContext *context_mir = GDK_MIR_GL_CONTEXT (gl_context);
GdkWindow *window = gdk_gl_context_get_window (gl_context);
GdkDisplay *display = gdk_window_get_display (window);
EGLDisplay egl_display = _gdk_mir_display_get_egl_display (display);
EGLSurface egl_surface;
GDK_DRAW_CONTEXT_CLASS (gdk_mir_gl_context_parent_class)->end_frame (context, painted, damage);
if (gdk_gl_context_get_shared_context (gl_context))
return;
gdk_gl_context_make_current (gl_context);
egl_surface = _gdk_mir_window_get_egl_surface (window,
context_mir->egl_config);
if (_gdk_mir_display_have_egl_swap_buffers_with_damage (display))
{
int i, j, n_rects = cairo_region_num_rectangles (damage);
EGLint *rects = g_new (EGLint, n_rects * 4);
cairo_rectangle_int_t rect;
int window_height = gdk_window_get_height (window);
for (i = 0, j = 0; i < n_rects; i++)
{
cairo_region_get_rectangle (damage, i, &rect);
rects[j++] = rect.x;
rects[j++] = window_height - rect.height - rect.y;
rects[j++] = rect.width;
rects[j++] = rect.height;
}
eglSwapBuffersWithDamageEXT (egl_display, egl_surface, rects, n_rects);
g_free (rects);
}
else
{
eglSwapBuffers (egl_display, egl_surface);
}
}
static void
gdk_mir_gl_context_dispose (GObject *gobject)
{
GdkMirGLContext *context_mir = GDK_MIR_GL_CONTEXT (gobject);
if (context_mir->egl_context != NULL)
{
GdkGLContext *context = GDK_GL_CONTEXT (gobject);
GdkWindow *window = gdk_gl_context_get_window (context);
GdkDisplay *display = gdk_window_get_display (window);
EGLDisplay egl_display = _gdk_mir_display_get_egl_display (display);
if (eglGetCurrentContext () == context_mir->egl_context)
eglMakeCurrent (egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
GDK_NOTE (OPENGL, g_print ("Destroying EGL context\n"));
eglDestroyContext (egl_display, context_mir->egl_context);
context_mir->egl_context = NULL;
}
G_OBJECT_CLASS (gdk_mir_gl_context_parent_class)->dispose (gobject);
}
static void
gdk_mir_gl_context_class_init (GdkMirGLContextClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GdkDrawContextClass *draw_context_class = GDK_DRAW_CONTEXT_CLASS (klass);
GdkGLContextClass *gl_context_class = GDK_GL_CONTEXT_CLASS (klass);
gl_context_class->realize = gdk_mir_gl_context_realize;
gl_context_class->get_damage = gdk_mir_gl_context_get_damage;
draw_context_class->end_frame = gdk_mir_gl_context_end_frame;
gobject_class->dispose = gdk_mir_gl_context_dispose;
}
static void
gdk_mir_gl_context_init (GdkMirGLContext *self)
{
}
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