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gtk/opengl: add opengl context and scanout support (egl)

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This allows virtio-gpu to render in 3d mode.
Uses egl, for gtk versions 3.14 and older.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
This commit is contained in:
Gerd Hoffmann 2015-05-08 11:30:51 +02:00
parent 6c18744d0f
commit 4782aeb79f
3 changed files with 146 additions and 8 deletions
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16
include/ui/gtk.h
View file

@ -20,6 +20,7 @@
#if defined(CONFIG_OPENGL)
#include "ui/egl-helpers.h"
#include "ui/egl-context.h"
#endif
/* Compatibility define to let us build on both Gtk2 and Gtk3 */
@ -46,6 +47,11 @@ typedef struct VirtualGfxConsole {
EGLContext ectx;
EGLSurface esurface;
int glupdates;
int x, y, w, h;
GLuint tex_id;
GLuint fbo_id;
bool y0_top;
bool scanout_mode;
#endif
} VirtualGfxConsole;
@ -90,6 +96,16 @@ void gd_egl_update(DisplayChangeListener *dcl,
void gd_egl_refresh(DisplayChangeListener *dcl);
void gd_egl_switch(DisplayChangeListener *dcl,
DisplaySurface *surface);
QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
QEMUGLParams *params);
void gd_egl_scanout(DisplayChangeListener *dcl,
uint32_t backing_id, bool backing_y_0_top,
uint32_t x, uint32_t y,
uint32_t w, uint32_t h);
void gd_egl_scanout_flush(DisplayChangeListener *dcl,
uint32_t x, uint32_t y, uint32_t w, uint32_t h);
void gtk_egl_init(void);
int gd_egl_make_current(DisplayChangeListener *dcl,
QEMUGLContext ctx);
#endif /* UI_GTK_H */

131
ui/gtk-egl.c
View file

@ -21,6 +21,29 @@
#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)
@ -50,19 +73,26 @@ void gd_egl_draw(VirtualConsole *vc)
GdkWindow *window;
int ww, wh;
if (!vc->gfx.gls || !vc->gfx.ds) {
if (!vc->gfx.gls) {
return;
}
eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
vc->gfx.esurface, vc->gfx.ectx);
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);
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);
eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
}
}
void gd_egl_update(DisplayChangeListener *dcl,
@ -99,6 +129,7 @@ void gd_egl_refresh(DisplayChangeListener *dcl)
if (vc->gfx.glupdates) {
vc->gfx.glupdates = 0;
gtk_egl_set_scanout_mode(vc, false);
gd_egl_draw(vc);
}
}
@ -128,6 +159,81 @@ void gd_egl_switch(DisplayChangeListener *dcl,
}
}
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(DisplayChangeListener *dcl,
uint32_t backing_id, bool backing_y_0_top,
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();
@ -139,3 +245,12 @@ void gtk_egl_init(void)
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);
}

7
ui/gtk.c
View file

@ -615,6 +615,13 @@ static const DisplayChangeListenerOps dcl_egl_ops = {
.dpy_refresh = gd_egl_refresh,
.dpy_mouse_set = gd_mouse_set,
.dpy_cursor_define = gd_cursor_define,
.dpy_gl_ctx_create = gd_egl_create_context,
.dpy_gl_ctx_destroy = qemu_egl_destroy_context,
.dpy_gl_ctx_make_current = gd_egl_make_current,
.dpy_gl_ctx_get_current = qemu_egl_get_current_context,
.dpy_gl_scanout = gd_egl_scanout,
.dpy_gl_update = gd_egl_scanout_flush,
};
#endif