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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 "qemu-common.h"
#include "trace.h"
#include "ui/console.h"
#include "ui/gtk.h"
#include "ui/egl-helpers.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) {
if (vc->gfx.fbo_id) {
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, 0, 0);
glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffers(1, &vc->gfx.fbo_id);
vc->gfx.fbo_id = 0;
}
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;
}
#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;
}
vc->gfx.ectx = qemu_egl_init_ctx();
vc->gfx.esurface = qemu_egl_init_surface_x11(vc->gfx.ectx, x11_window);
assert(vc->gfx.esurface);
}
void gd_egl_draw(VirtualConsole *vc)
{
GdkWindow *window;
int ww, wh;
if (!vc->gfx.gls) {
return;
}
if (vc->gfx.scanout_mode) {
gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
} else {
if (!vc->gfx.ds) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
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);
eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
}
}
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);
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);
}
}
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_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.tex_id = backing_id;
vc->gfx.y0_top = backing_y_0_top;
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
if (vc->gfx.tex_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
gtk_egl_set_scanout_mode(vc, false);
return;
}
gtk_egl_set_scanout_mode(vc, true);
if (!vc->gfx.fbo_id) {
glGenFramebuffers(1, &vc->gfx.fbo_id);
}
glBindFramebuffer(GL_FRAMEBUFFER_EXT, vc->gfx.fbo_id);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, vc->gfx.tex_id, 0);
}
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, y1, y2;
if (!vc->gfx.scanout_mode) {
return;
}
if (!vc->gfx.fbo_id) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.fbo_id);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
window = gtk_widget_get_window(vc->gfx.drawing_area);
gdk_drawable_get_size(window, &ww, &wh);
glViewport(0, 0, ww, wh);
y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
glBlitFramebuffer(0, y1, vc->gfx.w, y2,
0, 0, ww, wh,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
glBindFramebuffer(GL_FRAMEBUFFER_EXT, vc->gfx.fbo_id);
eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
}
void gtk_egl_init(void)
{
GdkDisplay *gdk_display = gdk_display_get_default();
Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
if (qemu_egl_init_dpy(x11_display, false, false) < 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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