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GTK: Add EGL WSI for OpenGL.

This commit is contained in:
Brandon Wright 2018-10-15 14:04:28 -05:00
parent e543702e24
commit 55723df0a6
2 changed files with 230 additions and 84 deletions
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168
gtk/src/gtk_display_driver_opengl.cpp
View File

@ -1,8 +1,13 @@
#include <gtk/gtk.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/gdkx.h>
#include <X11/Xlib.h>
#endif
#ifdef GDK_WINDOWING_WAYLAND
#include <gdk/gdkwayland.h>
#endif
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <X11/Xlib.h>
#include <dlfcn.h>
#include <sys/stat.h>
#include <fcntl.h>
@ -26,6 +31,7 @@ static void S9xViewportCallback (int src_width, int src_height,
*out_y = src_height + viewport_y;
*out_width = viewport_width;
*out_height = viewport_height;
return;
}
@ -659,9 +665,19 @@ S9xOpenGLDisplayDriver::refresh (int width, int height)
void
S9xOpenGLDisplayDriver::resize_window (int width, int height)
{
if (!using_egl)
gdk_window_destroy (gdk_window);
create_window (width, height);
if (using_egl)
eglMakeCurrent (egl_display, egl_surface, egl_surface, egl_context);
#ifdef GDK_WINDOWING_X11
else
glXMakeCurrent (display, xwindow, glx_context);
#endif
swap_control (config->sync_to_vblank);
return;
@ -670,6 +686,30 @@ S9xOpenGLDisplayDriver::resize_window (int width, int height)
void
S9xOpenGLDisplayDriver::create_window (int width, int height)
{
if (using_egl)
{
egl_surface = NULL;
gdk_window = gtk_widget_get_window (drawing_area);
#ifdef GDK_WINDOWING_X11
if (GDK_IS_X11_WINDOW (gdk_window))
{
xwindow = GDK_COMPAT_WINDOW_XID (gdk_window);
egl_surface = eglCreateWindowSurface (egl_display, egl_config, xwindow, NULL);
}
#endif
#ifdef GDK_WINDOWING_WAYLAND
if (GDK_IS_WAYLAND_WINDOW (gdk_window))
{
struct wl_surface *surface;
surface = gdk_wayland_window_get_wl_surface (gdk_window);
egl_surface = eglCreatePlatformWindowSurface (egl_display, egl_config, surface, NULL);
}
#endif
}
#ifdef GDK_WINDOWING_X11
else
{
GdkWindowAttr window_attr;
memset (&window_attr, 0, sizeof (GdkWindowAttr));
window_attr.event_mask = GDK_EXPOSURE_MASK | GDK_STRUCTURE_MASK;
@ -688,14 +728,85 @@ S9xOpenGLDisplayDriver::create_window (int width, int height)
gdk_window_show (gdk_window);
xwindow = GDK_COMPAT_WINDOW_XID (gdk_window);
}
#endif
output_window_width = width;
output_window_height = height;
}
int
S9xOpenGLDisplayDriver::init_glx (void)
S9xOpenGLDisplayDriver::init_gl (void)
{
using_egl = 0;
if (epoxy_has_egl ())
{
printf ("Using EGL context\n");
using_egl = 1;
EGLint num_configs;
EGLint const egl_attribs[] = { EGL_COLOR_BUFFER_TYPE, EGL_RGB_BUFFER, EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, EGL_NONE };
egl_display = NULL;
GdkDisplay *d = gdk_display_get_default ();
#ifdef GDK_WINDOWING_X11
if (GDK_IS_X11_DISPLAY (d))
{
display = GDK_DISPLAY_XDISPLAY (d);
egl_display = eglGetDisplay (display);
}
#endif
#ifdef GDK_WINDOWING_WAYLAND
if (GDK_IS_WAYLAND_DISPLAY (d))
{
struct wl_display *wl_d = gdk_wayland_display_get_wl_display (d);
egl_display = eglGetPlatformDisplay (EGL_PLATFORM_WAYLAND_KHR, wl_d, NULL);
}
#endif
if (!egl_display)
return 0;
eglInitialize (egl_display, NULL, NULL);
eglChooseConfig (egl_display, egl_attribs, &egl_config, 1, &num_configs);
eglBindAPI (EGL_OPENGL_API);
if (num_configs < 1)
{
fprintf (stderr, _("Couldn't find any appropriate EGL configs.\n"));
return 0;
}
create_window (1, 1);
if (!egl_surface)
{
fprintf (stderr, _("Couldn't create an EGL surface.\n"));
return 0;
}
egl_context = eglCreateContext (egl_display, egl_config, EGL_NO_CONTEXT, NULL);
if (!egl_context)
{
fprintf (stderr, _("Couldn't create an EGL context.\n"));
eglDestroySurface (egl_display, egl_surface);
return 0;
}
if (!eglMakeCurrent (egl_display, egl_surface, egl_surface, egl_context))
{
fprintf (stderr, _("Couldn't make current EGL context.\n"));
eglDestroyContext (egl_display, egl_context);
eglDestroySurface (egl_display, egl_surface);
return 0;
}
}
#ifdef GDK_WINDOWING_X11
else /* GLX */
{
printf ("Using GLX context\n");
int glx_attribs[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
display = GDK_DISPLAY_XDISPLAY (gdk_display_get_default ());
@ -708,7 +819,6 @@ S9xOpenGLDisplayDriver::init_glx (void)
return 0;
}
xcolormap = XCreateColormap (display,
GDK_COMPAT_WINDOW_XID (gtk_widget_get_window (drawing_area)),
vi->visual,
@ -737,6 +847,8 @@ S9xOpenGLDisplayDriver::init_glx (void)
fprintf (stderr, "glXMakeCurrent failed.\n");
return 0;
}
}
#endif
return 1;
}
@ -746,7 +858,7 @@ S9xOpenGLDisplayDriver::init (void)
{
initialized = 0;
if (!init_glx ())
if (!init_gl ())
{
return -1;
}
@ -778,6 +890,14 @@ void
S9xOpenGLDisplayDriver::swap_control (int enable)
{
enable = enable ? 1 : 0;
if (using_egl)
{
eglSwapInterval (egl_display, enable);
}
#ifdef GDK_WINDOWING_X11
else
{
const char *extensions = (const char *) glGetString (GL_EXTENSIONS);
if (strstr (extensions, "EXT_swap_control"))
@ -788,6 +908,8 @@ S9xOpenGLDisplayDriver::swap_control (int enable)
{
glXSwapIntervalSGI (enable);
}
}
#endif
return;
}
@ -815,12 +937,16 @@ S9xOpenGLDisplayDriver::get_current_buffer (void)
void
S9xOpenGLDisplayDriver::gl_swap (void)
{
if (using_egl)
eglSwapBuffers (egl_display, egl_surface);
#ifdef GDK_WINDOWING_X11
else
glXSwapBuffers (display, xwindow);
#endif
if (config->sync_every_frame)
{
usleep (0);
glXWaitX ();
glFinish ();
}
@ -866,13 +992,21 @@ S9xOpenGLDisplayDriver::deinit (void)
}
glDeleteTextures (1, &texmap);
if (using_egl)
{
eglDestroyContext (egl_display, egl_context);
eglDestroySurface (egl_display, egl_surface);
}
#ifdef GDK_WINDOWING_X11
else
{
glXDestroyContext (display, glx_context);
gdk_window_destroy (gdk_window);
XFree (vi);
XFreeColormap (display, xcolormap);
}
#endif
return;
}
@ -885,18 +1019,18 @@ S9xOpenGLDisplayDriver::reconfigure (int width, int height)
int
S9xOpenGLDisplayDriver::query_availability (void)
{
int errorBase, eventBase;
Display *display = GDK_DISPLAY_XDISPLAY (gdk_display_get_default ());
if (epoxy_has_egl ())
return 1;
if (!display)
return 0;
#ifdef GDK_WINDOWING_X11
Display *dpy = GDK_DISPLAY_XDISPLAY (gdk_display_get_default ());
if (epoxy_has_glx (dpy))
return 1;
#endif
if (glXQueryExtension (display, &errorBase, &eventBase) == False)
{
if (gui_config->hw_accel == HWA_OPENGL)
gui_config->hw_accel = HWA_NONE;
return 0;
}
return 1;
return 0;
}

20
gtk/src/gtk_display_driver_opengl.h
View File

@ -5,7 +5,10 @@
#include "gtk_display_driver.h"
#include <epoxy/gl.h>
#ifdef GDK_WINDOWING_X11
#include <epoxy/glx.h>
#endif
#include <epoxy/egl.h>
#include "shaders/glsl.h"
@ -50,7 +53,7 @@ class S9xOpenGLDisplayDriver : public S9xDisplayDriver
int shaders_available (void);
int load_shaders (const char *);
void update_texture_size (int width, int height);
int init_glx (void);
int init_gl (void);
void create_window (int width, int height);
void resize_window (int width, int height);
@ -72,14 +75,23 @@ class S9xOpenGLDisplayDriver : public S9xDisplayDriver
int using_glsl_shaders;
GLSLShader *glsl_shader;
GdkWindow *gdk_window;
int output_window_width;
int output_window_height;
#ifdef GDK_WINDOWING_X11
Display *display;
Window xwindow;
Colormap xcolormap;
XVisualInfo *vi;
GdkWindow *gdk_window;
GLXContext glx_context;
int output_window_width;
int output_window_height;
#endif
bool using_egl;
EGLDisplay egl_display;
EGLContext egl_context;
EGLConfig egl_config;
EGLSurface egl_surface;
};
#endif /* __GTK_DISPLAY_DRIVER_OPENGL_H */