Commit 4782aeb7 authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

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



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

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: default avatarMarc-André Lureau <marcandre.lureau@redhat.com>
parent 6c18744d

include/ui/gtk.h

+16 −0
Original line number Diff line number Diff line
@@ -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 */

ui/gtk-egl.c

+123 −8
Original line number Diff line number Diff line
@@ -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)
@@ -50,10 +73,16 @@ void gd_egl_draw(VirtualConsole *vc) 
    GdkWindow *window;

    int ww, wh;



    if (!vc->gfx.gls || !vc->gfx.ds) {

    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);
@@ -64,6 +93,7 @@ void gd_egl_draw(VirtualConsole *vc) 


        eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);

    }

}



void gd_egl_update(DisplayChangeListener *dcl,

                   int x, int y, int w, int h)
@@ -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);

}

ui/gtk.c

+7 −0
Original line number Diff line number Diff line
@@ -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