qemu/ui/gtk-egl.c
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   1/*
   2 * GTK UI -- egl opengl code.
   3 *
   4 * Note that gtk 3.16+ (released 2015-03-23) has a GtkGLArea widget,
   5 * which is GtkDrawingArea like widget with opengl rendering support.
   6 *
   7 * This code handles opengl support on older gtk versions, using egl
   8 * to get a opengl context for the X11 window.
   9 *
  10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
  11 * See the COPYING file in the top-level directory.
  12 */
  13
  14#include "qemu/osdep.h"
  15#include "qemu-common.h"
  16
  17#include "trace.h"
  18
  19#include "ui/console.h"
  20#include "ui/gtk.h"
  21#include "ui/egl-helpers.h"
  22#include "ui/shader.h"
  23
  24#include "sysemu/sysemu.h"
  25
  26static void gtk_egl_set_scanout_mode(VirtualConsole *vc, bool scanout)
  27{
  28    if (vc->gfx.scanout_mode == scanout) {
  29        return;
  30    }
  31
  32    vc->gfx.scanout_mode = scanout;
  33    if (!vc->gfx.scanout_mode) {
  34        egl_fb_destroy(&vc->gfx.guest_fb);
  35        if (vc->gfx.surface) {
  36            surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
  37            surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
  38        }
  39    }
  40}
  41
  42/** DisplayState Callbacks (opengl version) **/
  43
  44void gd_egl_init(VirtualConsole *vc)
  45{
  46    GdkWindow *gdk_window = gtk_widget_get_window(vc->gfx.drawing_area);
  47    if (!gdk_window) {
  48        return;
  49    }
  50
  51    Window x11_window = gdk_x11_window_get_xid(gdk_window);
  52    if (!x11_window) {
  53        return;
  54    }
  55
  56    vc->gfx.ectx = qemu_egl_init_ctx();
  57    vc->gfx.esurface = qemu_egl_init_surface_x11
  58        (vc->gfx.ectx, (EGLNativeWindowType)x11_window);
  59
  60    assert(vc->gfx.esurface);
  61}
  62
  63void gd_egl_draw(VirtualConsole *vc)
  64{
  65    GdkWindow *window;
  66    int ww, wh;
  67
  68    if (!vc->gfx.gls) {
  69        return;
  70    }
  71
  72    window = gtk_widget_get_window(vc->gfx.drawing_area);
  73    ww = gdk_window_get_width(window);
  74    wh = gdk_window_get_height(window);
  75
  76    if (vc->gfx.scanout_mode) {
  77        gd_egl_scanout_flush(&vc->gfx.dcl, 0, 0, vc->gfx.w, vc->gfx.h);
  78
  79        vc->gfx.scale_x = (double)ww / vc->gfx.w;
  80        vc->gfx.scale_y = (double)wh / vc->gfx.h;
  81    } else {
  82        if (!vc->gfx.ds) {
  83            return;
  84        }
  85        eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
  86                       vc->gfx.esurface, vc->gfx.ectx);
  87
  88        surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
  89        surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
  90
  91        eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
  92
  93        vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
  94        vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
  95    }
  96}
  97
  98void gd_egl_update(DisplayChangeListener *dcl,
  99                   int x, int y, int w, int h)
 100{
 101    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 102
 103    if (!vc->gfx.gls || !vc->gfx.ds) {
 104        return;
 105    }
 106
 107    eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 108                   vc->gfx.esurface, vc->gfx.ectx);
 109    surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
 110    vc->gfx.glupdates++;
 111}
 112
 113void gd_egl_refresh(DisplayChangeListener *dcl)
 114{
 115    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 116
 117    if (!vc->gfx.esurface) {
 118        gd_egl_init(vc);
 119        if (!vc->gfx.esurface) {
 120            return;
 121        }
 122        vc->gfx.gls = qemu_gl_init_shader();
 123        if (vc->gfx.ds) {
 124            surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 125        }
 126    }
 127
 128    graphic_hw_update(dcl->con);
 129
 130    if (vc->gfx.glupdates) {
 131        vc->gfx.glupdates = 0;
 132        gtk_egl_set_scanout_mode(vc, false);
 133        gd_egl_draw(vc);
 134    }
 135}
 136
 137void gd_egl_switch(DisplayChangeListener *dcl,
 138                   DisplaySurface *surface)
 139{
 140    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 141    bool resized = true;
 142
 143    trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 144
 145    if (vc->gfx.ds &&
 146        surface_width(vc->gfx.ds) == surface_width(surface) &&
 147        surface_height(vc->gfx.ds) == surface_height(surface)) {
 148        resized = false;
 149    }
 150
 151    surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 152    vc->gfx.ds = surface;
 153    if (vc->gfx.gls) {
 154        surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 155    }
 156
 157    if (resized) {
 158        gd_update_windowsize(vc);
 159    }
 160}
 161
 162QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
 163                                    QEMUGLParams *params)
 164{
 165    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 166
 167    eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 168                   vc->gfx.esurface, vc->gfx.ectx);
 169    return qemu_egl_create_context(dcl, params);
 170}
 171
 172void gd_egl_scanout_disable(DisplayChangeListener *dcl)
 173{
 174    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 175
 176    vc->gfx.w = 0;
 177    vc->gfx.h = 0;
 178    gtk_egl_set_scanout_mode(vc, false);
 179}
 180
 181void gd_egl_scanout_texture(DisplayChangeListener *dcl,
 182                            uint32_t backing_id, bool backing_y_0_top,
 183                            uint32_t backing_width, uint32_t backing_height,
 184                            uint32_t x, uint32_t y,
 185                            uint32_t w, uint32_t h)
 186{
 187    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 188
 189    vc->gfx.x = x;
 190    vc->gfx.y = y;
 191    vc->gfx.w = w;
 192    vc->gfx.h = h;
 193    vc->gfx.y0_top = backing_y_0_top;
 194
 195    eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 196                   vc->gfx.esurface, vc->gfx.ectx);
 197
 198    gtk_egl_set_scanout_mode(vc, true);
 199    egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 200                         backing_id, false);
 201}
 202
 203void gd_egl_scanout_dmabuf(DisplayChangeListener *dcl,
 204                           QemuDmaBuf *dmabuf)
 205{
 206#ifdef CONFIG_OPENGL_DMABUF
 207    egl_dmabuf_import_texture(dmabuf);
 208    if (!dmabuf->texture) {
 209        return;
 210    }
 211
 212    gd_egl_scanout_texture(dcl, dmabuf->texture,
 213                           false, dmabuf->width, dmabuf->height,
 214                           0, 0, dmabuf->width, dmabuf->height);
 215#endif
 216}
 217
 218void gd_egl_cursor_dmabuf(DisplayChangeListener *dcl,
 219                          QemuDmaBuf *dmabuf, bool have_hot,
 220                          uint32_t hot_x, uint32_t hot_y)
 221{
 222#ifdef CONFIG_OPENGL_DMABUF
 223    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 224
 225    if (dmabuf) {
 226        egl_dmabuf_import_texture(dmabuf);
 227        if (!dmabuf->texture) {
 228            return;
 229        }
 230        egl_fb_setup_for_tex(&vc->gfx.cursor_fb, dmabuf->width, dmabuf->height,
 231                             dmabuf->texture, false);
 232    } else {
 233        egl_fb_destroy(&vc->gfx.cursor_fb);
 234    }
 235#endif
 236}
 237
 238void gd_egl_cursor_position(DisplayChangeListener *dcl,
 239                            uint32_t pos_x, uint32_t pos_y)
 240{
 241    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 242
 243    vc->gfx.cursor_x = pos_x * vc->gfx.scale_x;
 244    vc->gfx.cursor_y = pos_y * vc->gfx.scale_y;
 245}
 246
 247void gd_egl_release_dmabuf(DisplayChangeListener *dcl,
 248                           QemuDmaBuf *dmabuf)
 249{
 250#ifdef CONFIG_OPENGL_DMABUF
 251    egl_dmabuf_release_texture(dmabuf);
 252#endif
 253}
 254
 255void gd_egl_scanout_flush(DisplayChangeListener *dcl,
 256                          uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 257{
 258    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 259    GdkWindow *window;
 260    int ww, wh;
 261
 262    if (!vc->gfx.scanout_mode) {
 263        return;
 264    }
 265    if (!vc->gfx.guest_fb.framebuffer) {
 266        return;
 267    }
 268
 269    eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 270                   vc->gfx.esurface, vc->gfx.ectx);
 271
 272    window = gtk_widget_get_window(vc->gfx.drawing_area);
 273    ww = gdk_window_get_width(window);
 274    wh = gdk_window_get_height(window);
 275    egl_fb_setup_default(&vc->gfx.win_fb, ww, wh);
 276    if (vc->gfx.cursor_fb.texture) {
 277        egl_texture_blit(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.guest_fb,
 278                         vc->gfx.y0_top);
 279        egl_texture_blend(vc->gfx.gls, &vc->gfx.win_fb, &vc->gfx.cursor_fb,
 280                          vc->gfx.y0_top,
 281                          vc->gfx.cursor_x, vc->gfx.cursor_y,
 282                          vc->gfx.scale_x, vc->gfx.scale_y);
 283    } else {
 284        egl_fb_blit(&vc->gfx.win_fb, &vc->gfx.guest_fb, !vc->gfx.y0_top);
 285    }
 286
 287    eglSwapBuffers(qemu_egl_display, vc->gfx.esurface);
 288}
 289
 290void gtk_egl_init(DisplayGLMode mode)
 291{
 292    GdkDisplay *gdk_display = gdk_display_get_default();
 293    Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 294
 295    if (qemu_egl_init_dpy_x11(x11_display, mode) < 0) {
 296        return;
 297    }
 298
 299    display_opengl = 1;
 300}
 301
 302int gd_egl_make_current(DisplayChangeListener *dcl,
 303                        QEMUGLContext ctx)
 304{
 305    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 306
 307    return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
 308                          vc->gfx.esurface, ctx);
 309}
 310
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