forked from AuroraMiddleware/gtk
94745241c2
As per the spec: > The back buffer can > either be reported as invalid (has an age of 0) or it may be > reported to contain the contents from n frames prior to the > current frame. So a buffer age of 1 means that the buffer was used in the last frame. We were handling buffer_age==1 the same as buffer_age==0, i.e. we returned the full damage for the surface. [1] https://www.khronos.org/registry/EGL/extensions/EXT/EGL_EXT_buffer_age.txt
535 lines
17 KiB
C
535 lines
17 KiB
C
/* GDK - The GIMP Drawing Kit
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*
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* gdkglcontext-wayland.c: Wayland specific OpenGL wrappers
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*
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* Copyright © 2014 Emmanuele Bassi
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* Copyright © 2014 Alexander Larsson
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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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#include "config.h"
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#include "gdkglcontext-wayland.h"
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#include "gdkdisplay-wayland.h"
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#include "gdkwaylanddisplay.h"
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#include "gdkwaylandglcontext.h"
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#include "gdkwaylandsurface.h"
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#include "gdkprivate-wayland.h"
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#include "gdkinternals.h"
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#include "gdkintl.h"
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G_DEFINE_TYPE (GdkWaylandGLContext, gdk_wayland_gl_context, GDK_TYPE_GL_CONTEXT)
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static void gdk_wayland_gl_context_dispose (GObject *gobject);
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#define N_EGL_ATTRS 16
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static gboolean
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gdk_wayland_gl_context_realize (GdkGLContext *context,
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GError **error)
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{
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GdkWaylandGLContext *context_wayland = GDK_WAYLAND_GL_CONTEXT (context);
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GdkDisplay *display = gdk_gl_context_get_display (context);
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GdkGLContext *share = gdk_gl_context_get_shared_context (context);
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GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
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EGLContext ctx;
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EGLint context_attribs[N_EGL_ATTRS];
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int major, minor, flags;
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gboolean debug_bit, forward_bit, legacy_bit, use_es;
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int i = 0;
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gdk_gl_context_get_required_version (context, &major, &minor);
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debug_bit = gdk_gl_context_get_debug_enabled (context);
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forward_bit = gdk_gl_context_get_forward_compatible (context);
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legacy_bit = GDK_DISPLAY_DEBUG_CHECK (display, GL_LEGACY) ||
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(share != NULL && gdk_gl_context_is_legacy (share));
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use_es = GDK_DISPLAY_DEBUG_CHECK (display, GL_GLES) ||
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(share != NULL && gdk_gl_context_get_use_es (share));
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flags = 0;
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if (debug_bit)
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flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
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if (forward_bit)
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flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
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if (!use_es)
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{
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eglBindAPI (EGL_OPENGL_API);
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/* We want a core profile, unless in legacy mode */
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context_attribs[i++] = EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR;
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context_attribs[i++] = legacy_bit
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? EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR
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: EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
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/* Specify the version */
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context_attribs[i++] = EGL_CONTEXT_MAJOR_VERSION_KHR;
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context_attribs[i++] = legacy_bit ? 3 : major;
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context_attribs[i++] = EGL_CONTEXT_MINOR_VERSION_KHR;
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context_attribs[i++] = legacy_bit ? 0 : minor;
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}
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else
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{
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eglBindAPI (EGL_OPENGL_ES_API);
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context_attribs[i++] = EGL_CONTEXT_CLIENT_VERSION;
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if (major == 3)
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context_attribs[i++] = 3;
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else
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context_attribs[i++] = 2;
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}
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/* Specify the flags */
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context_attribs[i++] = EGL_CONTEXT_FLAGS_KHR;
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context_attribs[i++] = flags;
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context_attribs[i++] = EGL_NONE;
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g_assert (i < N_EGL_ATTRS);
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GDK_DISPLAY_NOTE (display, OPENGL,
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g_message ("Creating EGL context version %d.%d (debug:%s, forward:%s, legacy:%s, es:%s)",
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major, minor,
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debug_bit ? "yes" : "no",
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forward_bit ? "yes" : "no",
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legacy_bit ? "yes" : "no",
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use_es ? "yes" : "no"));
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ctx = eglCreateContext (display_wayland->egl_display,
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context_wayland->egl_config,
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share != NULL ? GDK_WAYLAND_GL_CONTEXT (share)->egl_context
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: EGL_NO_CONTEXT,
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context_attribs);
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/* If context creation failed without the legacy bit, let's try again with it */
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if (ctx == NULL && !legacy_bit)
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{
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/* Ensure that re-ordering does not break the offsets */
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g_assert (context_attribs[0] == EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR);
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context_attribs[1] = EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR;
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context_attribs[3] = 3;
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context_attribs[5] = 0;
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eglBindAPI (EGL_OPENGL_API);
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legacy_bit = TRUE;
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use_es = FALSE;
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GDK_DISPLAY_NOTE (display, OPENGL,
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g_message ("eglCreateContext failed, switching to legacy"));
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ctx = eglCreateContext (display_wayland->egl_display,
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context_wayland->egl_config,
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share != NULL ? GDK_WAYLAND_GL_CONTEXT (share)->egl_context
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: EGL_NO_CONTEXT,
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context_attribs);
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}
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if (ctx == NULL)
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{
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g_set_error_literal (error, GDK_GL_ERROR,
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GDK_GL_ERROR_NOT_AVAILABLE,
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_("Unable to create a GL context"));
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return FALSE;
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}
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GDK_DISPLAY_NOTE (display, OPENGL, g_message ("Created EGL context[%p]", ctx));
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context_wayland->egl_context = ctx;
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gdk_gl_context_set_is_legacy (context, legacy_bit);
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gdk_gl_context_set_use_es (context, use_es);
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return TRUE;
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}
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static cairo_region_t *
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gdk_wayland_gl_context_get_damage (GdkGLContext *context)
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{
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GdkDisplay *display = gdk_draw_context_get_display (GDK_DRAW_CONTEXT (context));
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GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
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EGLSurface egl_surface;
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GdkSurface *surface = gdk_draw_context_get_surface (GDK_DRAW_CONTEXT (context));
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int buffer_age = 0;
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if (display_wayland->have_egl_buffer_age)
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{
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GdkGLContext *shared;
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GdkWaylandGLContext *shared_wayland;
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shared = gdk_gl_context_get_shared_context (context);
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if (shared == NULL)
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shared = context;
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shared_wayland = GDK_WAYLAND_GL_CONTEXT (shared);
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egl_surface = gdk_wayland_surface_get_egl_surface (surface->impl_surface,
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shared_wayland->egl_config);
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gdk_gl_context_make_current (shared);
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eglQuerySurface (display_wayland->egl_display, egl_surface,
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EGL_BUFFER_AGE_EXT, &buffer_age);
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switch (buffer_age)
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{
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case 1:
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return cairo_region_create ();
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break;
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case 2:
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if (context->old_updated_area[0])
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return cairo_region_copy (context->old_updated_area[0]);
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break;
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case 3:
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if (context->old_updated_area[0] &&
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context->old_updated_area[1])
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{
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cairo_region_t *damage = cairo_region_copy (context->old_updated_area[0]);
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cairo_region_union (damage, context->old_updated_area[1]);
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return damage;
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}
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break;
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default:
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;
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}
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}
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return GDK_GL_CONTEXT_CLASS (gdk_wayland_gl_context_parent_class)->get_damage (context);
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}
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static void
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gdk_wayland_gl_context_end_frame (GdkDrawContext *draw_context,
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cairo_region_t *painted)
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{
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GdkGLContext *context = GDK_GL_CONTEXT (draw_context);
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GdkSurface *surface = gdk_gl_context_get_surface (context);
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GdkDisplay *display = gdk_surface_get_display (surface);
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GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
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GdkWaylandGLContext *context_wayland = GDK_WAYLAND_GL_CONTEXT (context);
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EGLSurface egl_surface;
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GDK_DRAW_CONTEXT_CLASS (gdk_wayland_gl_context_parent_class)->end_frame (draw_context, painted);
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if (gdk_gl_context_get_shared_context (context))
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return;
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gdk_gl_context_make_current (context);
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egl_surface = gdk_wayland_surface_get_egl_surface (surface->impl_surface,
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context_wayland->egl_config);
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gdk_wayland_surface_sync (surface);
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gdk_wayland_surface_request_frame (surface);
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if (display_wayland->have_egl_swap_buffers_with_damage)
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{
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int i, j, n_rects = cairo_region_num_rectangles (painted);
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EGLint *rects = g_new (EGLint, n_rects * 4);
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cairo_rectangle_int_t rect;
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int surface_height = gdk_surface_get_height (surface);
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for (i = 0, j = 0; i < n_rects; i++)
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{
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cairo_region_get_rectangle (painted, i, &rect);
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rects[j++] = rect.x;
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rects[j++] = surface_height - rect.height - rect.y;
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rects[j++] = rect.width;
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rects[j++] = rect.height;
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}
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eglSwapBuffersWithDamageEXT (display_wayland->egl_display, egl_surface, rects, n_rects);
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g_free (rects);
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}
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else
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eglSwapBuffers (display_wayland->egl_display, egl_surface);
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}
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static void
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gdk_wayland_gl_context_class_init (GdkWaylandGLContextClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GdkDrawContextClass *draw_context_class = GDK_DRAW_CONTEXT_CLASS (klass);
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GdkGLContextClass *context_class = GDK_GL_CONTEXT_CLASS (klass);
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gobject_class->dispose = gdk_wayland_gl_context_dispose;
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draw_context_class->end_frame = gdk_wayland_gl_context_end_frame;
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context_class->realize = gdk_wayland_gl_context_realize;
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context_class->get_damage = gdk_wayland_gl_context_get_damage;
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}
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static void
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gdk_wayland_gl_context_init (GdkWaylandGLContext *self)
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{
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}
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static EGLDisplay
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gdk_wayland_get_display (GdkWaylandDisplay *display_wayland)
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{
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EGLDisplay dpy = NULL;
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if (epoxy_has_egl_extension (NULL, "EGL_KHR_platform_base"))
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{
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PFNEGLGETPLATFORMDISPLAYPROC getPlatformDisplay =
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(void *) eglGetProcAddress ("eglGetPlatformDisplay");
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if (getPlatformDisplay)
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dpy = getPlatformDisplay (EGL_PLATFORM_WAYLAND_EXT,
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display_wayland->wl_display,
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NULL);
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if (dpy)
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return dpy;
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}
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if (epoxy_has_egl_extension (NULL, "EGL_EXT_platform_base"))
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{
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PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplay =
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(void *) eglGetProcAddress ("eglGetPlatformDisplayEXT");
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if (getPlatformDisplay)
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dpy = getPlatformDisplay (EGL_PLATFORM_WAYLAND_EXT,
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display_wayland->wl_display,
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NULL);
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if (dpy)
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return dpy;
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}
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return eglGetDisplay ((EGLNativeDisplayType) display_wayland->wl_display);
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}
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gboolean
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gdk_wayland_display_init_gl (GdkDisplay *display)
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{
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GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
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EGLint major, minor;
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EGLDisplay dpy;
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if (display_wayland->have_egl)
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return TRUE;
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dpy = gdk_wayland_get_display (display_wayland);
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if (dpy == NULL)
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return FALSE;
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if (!eglInitialize (dpy, &major, &minor))
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return FALSE;
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if (!eglBindAPI (EGL_OPENGL_API))
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return FALSE;
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display_wayland->egl_display = dpy;
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display_wayland->egl_major_version = major;
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display_wayland->egl_minor_version = minor;
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display_wayland->have_egl = TRUE;
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display_wayland->have_egl_khr_create_context =
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epoxy_has_egl_extension (dpy, "EGL_KHR_create_context");
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display_wayland->have_egl_buffer_age =
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epoxy_has_egl_extension (dpy, "EGL_EXT_buffer_age");
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display_wayland->have_egl_swap_buffers_with_damage =
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epoxy_has_egl_extension (dpy, "EGL_EXT_swap_buffers_with_damage");
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display_wayland->have_egl_surfaceless_context =
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epoxy_has_egl_extension (dpy, "EGL_KHR_surfaceless_context");
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GDK_DISPLAY_NOTE (display, OPENGL,
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g_message ("EGL API version %d.%d found\n"
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" - Vendor: %s\n"
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" - Version: %s\n"
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" - Client APIs: %s\n"
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" - Extensions:\n"
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"\t%s",
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display_wayland->egl_major_version,
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display_wayland->egl_minor_version,
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eglQueryString (dpy, EGL_VENDOR),
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eglQueryString (dpy, EGL_VERSION),
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eglQueryString (dpy, EGL_CLIENT_APIS),
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eglQueryString (dpy, EGL_EXTENSIONS)));
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return TRUE;
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}
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#define MAX_EGL_ATTRS 30
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static gboolean
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find_eglconfig_for_surface (GdkSurface *surface,
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EGLConfig *egl_config_out,
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GError **error)
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{
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GdkDisplay *display = gdk_surface_get_display (surface);
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GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
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EGLint attrs[MAX_EGL_ATTRS];
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EGLint count;
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EGLConfig *configs;
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int i = 0;
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attrs[i++] = EGL_SURFACE_TYPE;
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attrs[i++] = EGL_WINDOW_BIT;
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attrs[i++] = EGL_COLOR_BUFFER_TYPE;
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attrs[i++] = EGL_RGB_BUFFER;
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attrs[i++] = EGL_RED_SIZE;
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attrs[i++] = 1;
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attrs[i++] = EGL_GREEN_SIZE;
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attrs[i++] = 1;
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attrs[i++] = EGL_BLUE_SIZE;
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attrs[i++] = 1;
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attrs[i++] = EGL_ALPHA_SIZE;
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attrs[i++] = 1;
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attrs[i++] = EGL_NONE;
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g_assert (i < MAX_EGL_ATTRS);
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if (!eglChooseConfig (display_wayland->egl_display, attrs, NULL, 0, &count) || count < 1)
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{
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g_set_error_literal (error, GDK_GL_ERROR,
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GDK_GL_ERROR_UNSUPPORTED_FORMAT,
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_("No available configurations for the given pixel format"));
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return FALSE;
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}
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configs = g_new (EGLConfig, count);
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if (!eglChooseConfig (display_wayland->egl_display, attrs, configs, count, &count) || count < 1)
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{
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g_set_error_literal (error, GDK_GL_ERROR,
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GDK_GL_ERROR_UNSUPPORTED_FORMAT,
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_("No available configurations for the given pixel format"));
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return FALSE;
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}
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/* Pick first valid configuration i guess? */
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if (egl_config_out != NULL)
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*egl_config_out = configs[0];
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g_free (configs);
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return TRUE;
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}
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GdkGLContext *
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gdk_wayland_surface_create_gl_context (GdkSurface *surface,
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gboolean attached,
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GdkGLContext *share,
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GError **error)
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{
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GdkDisplay *display = gdk_surface_get_display (surface);
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GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
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GdkWaylandGLContext *context;
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EGLConfig config;
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if (!gdk_wayland_display_init_gl (display))
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{
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g_set_error_literal (error, GDK_GL_ERROR,
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GDK_GL_ERROR_NOT_AVAILABLE,
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_("No GL implementation is available"));
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return NULL;
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}
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if (!display_wayland->have_egl_khr_create_context)
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{
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g_set_error_literal (error, GDK_GL_ERROR,
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GDK_GL_ERROR_UNSUPPORTED_PROFILE,
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_("Core GL is not available on EGL implementation"));
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return NULL;
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}
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if (!find_eglconfig_for_surface (surface, &config, error))
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return NULL;
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context = g_object_new (GDK_TYPE_WAYLAND_GL_CONTEXT,
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"surface", surface,
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"shared-context", share,
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NULL);
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context->egl_config = config;
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context->is_attached = attached;
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return GDK_GL_CONTEXT (context);
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}
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static void
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gdk_wayland_gl_context_dispose (GObject *gobject)
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{
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GdkWaylandGLContext *context_wayland = GDK_WAYLAND_GL_CONTEXT (gobject);
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if (context_wayland->egl_context != NULL)
|
|
{
|
|
GdkGLContext *context = GDK_GL_CONTEXT (gobject);
|
|
GdkSurface *surface = gdk_gl_context_get_surface (context);
|
|
GdkDisplay *display = gdk_surface_get_display (surface);
|
|
GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
|
|
|
|
if (eglGetCurrentContext () == context_wayland->egl_context)
|
|
eglMakeCurrent(display_wayland->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
|
|
EGL_NO_CONTEXT);
|
|
|
|
GDK_DISPLAY_NOTE (display, OPENGL, g_message ("Destroying EGL context"));
|
|
|
|
eglDestroyContext (display_wayland->egl_display,
|
|
context_wayland->egl_context);
|
|
context_wayland->egl_context = NULL;
|
|
}
|
|
|
|
G_OBJECT_CLASS (gdk_wayland_gl_context_parent_class)->dispose (gobject);
|
|
}
|
|
|
|
gboolean
|
|
gdk_wayland_display_make_gl_context_current (GdkDisplay *display,
|
|
GdkGLContext *context)
|
|
{
|
|
GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
|
|
GdkWaylandGLContext *context_wayland;
|
|
GdkSurface *surface;
|
|
EGLSurface egl_surface;
|
|
|
|
if (context == NULL)
|
|
{
|
|
eglMakeCurrent(display_wayland->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
|
|
EGL_NO_CONTEXT);
|
|
return TRUE;
|
|
}
|
|
|
|
context_wayland = GDK_WAYLAND_GL_CONTEXT (context);
|
|
surface = gdk_gl_context_get_surface (context);
|
|
|
|
if (context_wayland->is_attached || gdk_draw_context_is_in_frame (GDK_DRAW_CONTEXT (context)))
|
|
egl_surface = gdk_wayland_surface_get_egl_surface (surface->impl_surface, context_wayland->egl_config);
|
|
else
|
|
{
|
|
if (display_wayland->have_egl_surfaceless_context)
|
|
egl_surface = EGL_NO_SURFACE;
|
|
else
|
|
egl_surface = gdk_wayland_surface_get_dummy_egl_surface (surface->impl_surface,
|
|
context_wayland->egl_config);
|
|
}
|
|
|
|
if (!eglMakeCurrent (display_wayland->egl_display, egl_surface,
|
|
egl_surface, context_wayland->egl_context))
|
|
{
|
|
g_warning ("eglMakeCurrent failed");
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|