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dc6e831524
The term "hdr" is so overloaded, we shouldn't use them anywhere, except from maybe describing all of this work in blog posts and other marketing materials. So do renames: * hdr => high_depth * request_hdr => prefers_high_depth This more accurately describes what is going on.
159 lines
4.1 KiB
C
159 lines
4.1 KiB
C
/* GDK - The GIMP Drawing Kit
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*
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* gdkglcontext-egl.c: EGL-X11 specific wrappers
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*
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* SPDX-FileCopyrightText: 2014 Emmanuele Bassi
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* SPDX-FileCopyrightText: 2021 GNOME Foundation
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#include "config.h"
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#include "gdkglcontext-x11.h"
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#include "gdkdisplay-x11.h"
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#include "gdkprivate-x11.h"
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#include "gdkscreen-x11.h"
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#include "gdkx11display.h"
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#include "gdkx11glcontext.h"
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#include "gdkx11screen.h"
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#include "gdkx11property.h"
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#include <X11/Xatom.h>
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#include "gdkprofilerprivate.h"
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#include "gdkintl.h"
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#include <cairo-xlib.h>
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#include <epoxy/egl.h>
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struct _GdkX11GLContextEGL
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{
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GdkX11GLContext parent_instance;
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guint do_frame_sync : 1;
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};
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typedef struct _GdkX11GLContextClass GdkX11GLContextEGLClass;
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G_DEFINE_TYPE (GdkX11GLContextEGL, gdk_x11_gl_context_egl, GDK_TYPE_X11_GL_CONTEXT)
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/**
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* gdk_x11_display_get_egl_display:
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* @display: (type GdkX11Display): an X11 display
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*
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* Retrieves the EGL display connection object for the given GDK display.
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*
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* This function returns `NULL` if GDK is using GLX.
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*
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* Returns: (nullable): the EGL display object
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*
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* Since: 4.4
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*/
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gpointer
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gdk_x11_display_get_egl_display (GdkDisplay *display)
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{
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g_return_val_if_fail (GDK_IS_X11_DISPLAY (display), NULL);
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return gdk_display_get_egl_display (display);
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}
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static void
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gdk_x11_gl_context_egl_begin_frame (GdkDrawContext *draw_context,
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gboolean prefers_high_depth,
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cairo_region_t *region)
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{
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GDK_DRAW_CONTEXT_CLASS (gdk_x11_gl_context_egl_parent_class)->begin_frame (draw_context, prefers_high_depth, region);
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glDrawBuffers (1, (GLenum[1]) { GL_BACK });
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}
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static gboolean
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gdk_x11_gl_context_egl_make_current (GdkGLContext *context,
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gboolean surfaceless)
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{
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GdkX11GLContextEGL *self = GDK_X11_GL_CONTEXT_EGL (context);
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GdkDisplay *display = gdk_gl_context_get_display (context);
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EGLDisplay egl_display = gdk_display_get_egl_display (display);
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gboolean do_frame_sync = FALSE;
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if (!GDK_GL_CONTEXT_CLASS (gdk_x11_gl_context_egl_parent_class)->make_current (context, surfaceless))
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return FALSE;
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if (surfaceless)
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return TRUE;
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/* If the WM is compositing there is no particular need to delay
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* the swap when drawing on the offscreen, rendering to the screen
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* happens later anyway, and its up to the compositor to sync that
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* to the vblank. */
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do_frame_sync = ! gdk_display_is_composited (display);
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if (do_frame_sync != self->do_frame_sync)
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{
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self->do_frame_sync = do_frame_sync;
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if (do_frame_sync)
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eglSwapInterval (egl_display, 1);
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else
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eglSwapInterval (egl_display, 0);
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}
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return TRUE;
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}
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static void
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gdk_x11_gl_context_egl_class_init (GdkX11GLContextEGLClass *klass)
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{
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GdkGLContextClass *context_class = GDK_GL_CONTEXT_CLASS (klass);
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GdkDrawContextClass *draw_context_class = GDK_DRAW_CONTEXT_CLASS (klass);
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context_class->backend_type = GDK_GL_EGL;
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context_class->make_current = gdk_x11_gl_context_egl_make_current;
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draw_context_class->begin_frame = gdk_x11_gl_context_egl_begin_frame;
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}
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static void
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gdk_x11_gl_context_egl_init (GdkX11GLContextEGL *self)
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{
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self->do_frame_sync = TRUE;
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}
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/**
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* gdk_x11_display_get_egl_version:
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* @display: (type GdkX11Display): a `GdkDisplay`
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* @major: (out): return location for the EGL major version
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* @minor: (out): return location for the EGL minor version
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*
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* Retrieves the version of the EGL implementation.
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*
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* Returns: %TRUE if EGL is available
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*
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* Since: 4.4
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*/
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gboolean
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gdk_x11_display_get_egl_version (GdkDisplay *display,
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int *major,
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int *minor)
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{
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g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
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if (!GDK_IS_X11_DISPLAY (display))
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return FALSE;
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GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
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if (gdk_display_get_egl_display (display) == NULL)
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return FALSE;
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if (major != NULL)
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*major = display_x11->egl_version / 10;
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if (minor != NULL)
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*minor = display_x11->egl_version % 10;
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return TRUE;
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}
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