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xemu/ui/gtk-egl.c
Akihiko Odaki bc6a3565c8 configure: Improve OpenGL dependency detections 
This has the following visible changes:

- GBM is required only for OpenGL dma-buf.
- X11 is explicitly required by gtk-egl.
- EGL is now mandatory for the OpenGL displays.

The last one needs some detailed description. Before this change,
EGL was tested only for OpenGL dma-buf with the check of
EGL_MESA_image_dma_buf_export. However, all of the OpenGL
displays depend on EGL and EGL_MESA_image_dma_buf_export is always
defined by epoxy's EGL interface.
Therefore, it makes more sense to always check the presence of EGL
and say the OpenGL displays are available along with OpenGL dma-buf
if it is present.

Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Message-Id: <20210223060307.87736-1-akihiko.odaki@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2021-03-04 09:35:30 +01:00

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/*
* 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.
*/
#include "qemu/osdep.h"
#include "trace.h"
#include "ui/console.h"
#include "ui/gtk.h"
#include "ui/egl-helpers.h"
#include "ui/shader.h"
#include "sysemu/sysemu.h"
static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
{
if (vc->gfx.scanout_mode == scanout) {
return;
}
vc->gfx.scanout_mode = scanout;
if (!vc->gfx.scanout_mode) {
egl_fb_destroy(&vc->gfx.guest_fb);
if (vc->gfx.surface) {
surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
}
}
/** DisplayState Callbacks (opengl version) **/
void gd_egl_init(VirtualConsole *vc)
{
GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
if (!gdk_window) {
return;
}
Window x11_window = gdk_x11_window_get_xid(gdk_window);
if (!x11_window) {
return;
}
vc->gfx.ectx = qemu_egl_init_ctx();
vc->gfx.esurface = qemu_egl_init_surface_x11
(vc->gfx.ectx, (EGLNativeWindowType)x11_window);
assert(vc->gfx.esurface);
}
void gd_egl_draw(VirtualConsole *vc)
{
GdkWindow *window;
int ww, wh;
if (!vc->gfx.gls) {
return;
}
window = gtk_widget_get_window(vc->gfx.drawing_area);
ww = gdk_window_get_width(window);
wh = gdk_window_get_height(window);
if (vc->gfx.scanout_mode) {
gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
vc->gfx.scale_x = (double)ww / vc->gfx.w;
vc->gfx.scale_y = (double)wh / vc->gfx.h;
} else {
if (!vc->gfx.ds) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
}
glFlush();
graphic_hw_gl_flushed(vc->gfx.dcl.con);
}
void gd_egl_update(DisplayChangeListener *dcl,
int x, int y, int w, int h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
if (!vc->gfx.gls || !vc->gfx.ds) {
return;
}
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++;
}
void gd_egl_refresh(DisplayChangeListener *dcl)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
vc->gfx.dcl.update_interval = gd_monitor_update_interval(
vc->window ? vc->window : vc->gfx.drawing_area);
if (!vc->gfx.esurface) {
gd_egl_init(vc);
if (!vc->gfx.esurface) {
return;
}
vc->gfx.gls = qemu_gl_init_shader();
if (vc->gfx.ds) {
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
}
graphic_hw_update(dcl->con);
if (vc->gfx.glupdates) {
vc->gfx.glupdates = 0;
gtk_egl_set_scanout_mode(vc, false);
gd_egl_draw(vc);
}
}
void gd_egl_switch(DisplayChangeListener *dcl,
DisplaySurface *surface)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
bool resized = true;
trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
if (vc->gfx.ds &&
surface_width(vc->gfx.ds) == surface_width(surface) &&
surface_height(vc->gfx.ds) == surface_height(surface)) {
resized = false;
}
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);
}
if (resized) {
gd_update_windowsize(vc);
}
}
QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
QEMUGLParams *params)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
return qemu_egl_create_context(dcl, params);
}
void gd_egl_scanout_disable(DisplayChangeListener *dcl)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
vc->gfx.w = 0;
vc->gfx.h = 0;
gtk_egl_set_scanout_mode(vc, false);
}
void gd_egl_scanout_texture(DisplayChangeListener *dcl,
uint32_t backing_id, bool backing_y_0_top,
uint32_t backing_width, uint32_t backing_height,
uint32_t x, uint32_t y,
uint32_t w, uint32_t h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
vc->gfx.x = x;
vc->gfx.y = y;
vc->gfx.w = w;
vc->gfx.h = h;
vc->gfx.y0_top = backing_y_0_top;
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
gtk_egl_set_scanout_mode(vc, true);
egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
backing_id, false);
}
void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
QemuDmaBuf *dmabuf)
{
#ifdef CONFIG_GBM
egl_dmabuf_import_texture(dmabuf);
if (!dmabuf->texture) {
return;
}
gd_egl_scanout_texture(dcl, dmabuf->texture,
false, dmabuf->width, dmabuf->height,
0, 0, dmabuf->width, dmabuf->height);
#endif
}
void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
QemuDmaBuf *dmabuf, bool have_hot,
uint32_t hot_x, uint32_t hot_y)
{
#ifdef CONFIG_GBM
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
if (dmabuf) {
egl_dmabuf_import_texture(dmabuf);
if (!dmabuf->texture) {
return;
}
egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
dmabuf->texture, false);
} else {
egl_fb_destroy(&vc->gfx.cursor_fb);
}
#endif
}
void gd_egl_cursor_position(DisplayChangeListener *dcl,
uint32_t pos_x, uint32_t pos_y)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
}
void gd_egl_release_dmabuf(DisplayChangeListener *dcl,
QemuDmaBuf *dmabuf)
{
#ifdef CONFIG_GBM
egl_dmabuf_release_texture(dmabuf);
#endif
}
void gd_egl_scanout_flush(DisplayChangeListener *dcl,
uint32_t x, uint32_t y, uint32_t w, uint32_t h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
GdkWindow *window;
int ww, wh;
if (!vc->gfx.scanout_mode) {
return;
}
if (!vc->gfx.guest_fb.framebuffer) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
window = gtk_widget_get_window(vc->gfx.drawing_area);
ww = gdk_window_get_width(window);
wh = gdk_window_get_height(window);
egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
if (vc->gfx.cursor_fb.texture) {
egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
vc->gfx.y0_top);
egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
vc->gfx.y0_top,
vc->gfx.cursor_x, vc->gfx.cursor_y,
vc->gfx.scale_x, vc->gfx.scale_y);
} else {
egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
}
eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
}
void gtk_egl_init(DisplayGLMode mode)
{
GdkDisplay *gdk_display = gdk_display_get_default();
Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
return;
}
display_opengl = 1;
}
int gd_egl_make_current(DisplayChangeListener *dcl,
QEMUGLContext ctx)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, ctx);
}
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