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This adds opengl rendering support to the gtk ui, using egl. It's off by default for now, use 'qemu -display gtk,gl=on' to play with this. Note that gtk got native opengl support with release 3.16. There most likely will be a separate implementation for 3.16+, using the native gtk opengl support. This patch covers older versions (and for the time being 3.16 too, hopefully without rendering quirks). Signed-off-by: Gerd Hoffmann <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| /* | ||
| * GTK UI -- egl opengl code. | ||
| * | ||
| * Note that gtk 3.16+ (released 2015-03-23) has a GtkGLArea widget, | ||
| * which is GtkDrawingArea like widget with opengl rendering support. | ||
| * | ||
| * This code handles opengl support on older gtk versions, using egl | ||
| * to get a opengl context for the X11 window. | ||
| * | ||
| * This work is licensed under the terms of the GNU GPL, version 2 or later. | ||
| * See the COPYING file in the top-level directory. | ||
| */ | ||
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| #include "qemu-common.h" | ||
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| #include "trace.h" | ||
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| #include "ui/console.h" | ||
| #include "ui/gtk.h" | ||
| #include "ui/egl-helpers.h" | ||
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| #include "sysemu/sysemu.h" | ||
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| /** DisplayState Callbacks (opengl version) **/ | ||
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| void gd_egl_init(VirtualConsole *vc) | ||
| { | ||
| GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area); | ||
| if (!gdk_window) { | ||
| return; | ||
| } | ||
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| #if GTK_CHECK_VERSION(3, 0, 0) | ||
| Window x11_window = gdk_x11_window_get_xid(gdk_window); | ||
| #else | ||
| Window x11_window = gdk_x11_drawable_get_xid(gdk_window); | ||
| #endif | ||
| if (!x11_window) { | ||
| return; | ||
| } | ||
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| vc->gfx.ectx = qemu_egl_init_ctx(); | ||
| vc->gfx.esurface = qemu_egl_init_surface_x11(vc->gfx.ectx, x11_window); | ||
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| assert(vc->gfx.esurface); | ||
| } | ||
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| void gd_egl_draw(VirtualConsole *vc) | ||
| { | ||
| GdkWindow *window; | ||
| int ww, wh; | ||
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| if (!vc->gfx.gls || !vc->gfx.ds) { | ||
| return; | ||
| } | ||
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| eglMakeCurrent(qemu_egl_display, vc->gfx.esurface, | ||
| vc->gfx.esurface, vc->gfx.ectx); | ||
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| window = gtk_widget_get_window(vc->gfx.drawing_area); | ||
| gdk_drawable_get_size(window, &ww, &wh); | ||
| surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh); | ||
| surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds); | ||
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| eglSwapBuffers(qemu_egl_display, vc->gfx.esurface); | ||
| } | ||
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| void gd_egl_update(DisplayChangeListener *dcl, | ||
| int x, int y, int w, int h) | ||
| { | ||
| VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); | ||
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| if (!vc->gfx.gls || !vc->gfx.ds) { | ||
| return; | ||
| } | ||
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| eglMakeCurrent(qemu_egl_display, vc->gfx.esurface, | ||
| vc->gfx.esurface, vc->gfx.ectx); | ||
| surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h); | ||
| vc->gfx.glupdates++; | ||
| } | ||
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| void gd_egl_refresh(DisplayChangeListener *dcl) | ||
| { | ||
| VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); | ||
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| if (!vc->gfx.esurface) { | ||
| gd_egl_init(vc); | ||
| if (!vc->gfx.esurface) { | ||
| return; | ||
| } | ||
| vc->gfx.gls = console_gl_init_context(); | ||
| if (vc->gfx.ds) { | ||
| surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds); | ||
| } | ||
| } | ||
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| graphic_hw_update(dcl->con); | ||
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| if (vc->gfx.glupdates) { | ||
| vc->gfx.glupdates = 0; | ||
| gd_egl_draw(vc); | ||
| } | ||
| } | ||
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| void gd_egl_switch(DisplayChangeListener *dcl, | ||
| DisplaySurface *surface) | ||
| { | ||
| VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); | ||
| bool resized = true; | ||
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| trace_gd_switch(vc->label, surface_width(surface), surface_height(surface)); | ||
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| if (vc->gfx.ds && | ||
| surface_width(vc->gfx.ds) == surface_width(surface) && | ||
| surface_height(vc->gfx.ds) == surface_height(surface)) { | ||
| resized = false; | ||
| } | ||
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| surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds); | ||
| vc->gfx.ds = surface; | ||
| if (vc->gfx.gls) { | ||
| surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds); | ||
| } | ||
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| if (resized) { | ||
| gd_update_windowsize(vc); | ||
| } | ||
| } | ||
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| void gtk_egl_init(void) | ||
| { | ||
| GdkDisplay *gdk_display = gdk_display_get_default(); | ||
| Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display); | ||
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| if (qemu_egl_init_dpy(x11_display, false, false) < 0) { | ||
| return; | ||
| } | ||
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| display_opengl = 1; | ||
| } |
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