ui/egl-headless.c

   1 #include "qemu/osdep.h"
   2 #include "qemu-common.h"
   3 #include "sysemu/sysemu.h"
   4 #include "ui/console.h"
   5 #include "ui/egl-helpers.h"
   6 #include "ui/egl-context.h"
   7
   8 typedef struct egl_dpy {
   9     DisplayChangeListener dcl;
  10     DisplaySurface *ds;
  11     egl_fb guest_fb;
  12     egl_fb blit_fb;
  13     bool y_0_top;
  14 } egl_dpy;
  15
  16 /* ------------------------------------------------------------------ */
  17
  18 static void egl_refresh(DisplayChangeListener *dcl)
  19 {
  20     graphic_hw_update(dcl->con);
  21 }
  22
  23 static void egl_gfx_update(DisplayChangeListener *dcl,
  24                            int x, int y, int w, int h)
  25 {
  26 }
  27
  28 static void egl_gfx_switch(DisplayChangeListener *dcl,
  29                            struct DisplaySurface *new_surface)
  30 {
  31     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
  32
  33     edpy->ds = new_surface;
  34 }
  35
  36 static void egl_scanout_disable(DisplayChangeListener *dcl)
  37 {
  38     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
  39
  40     egl_fb_destroy(&edpy->guest_fb);
  41     egl_fb_destroy(&edpy->blit_fb);
  42 }
  43
  44 static void egl_scanout_texture(DisplayChangeListener *dcl,
  45                                 uint32_t backing_id,
  46                                 bool backing_y_0_top,
  47                                 uint32_t backing_width,
  48                                 uint32_t backing_height,
  49                                 uint32_t x, uint32_t y,
  50                                 uint32_t w, uint32_t h)
  51 {
  52     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
  53
  54     edpy->y_0_top = backing_y_0_top;
  55
  56     /* source framebuffer */
  57     egl_fb_setup_for_tex(&edpy->guest_fb,
  58                          backing_width, backing_height, backing_id, false);
  59
  60     /* dest framebuffer */
  61     if (edpy->blit_fb.width  != backing_width ||
  62         edpy->blit_fb.height != backing_height) {
  63         egl_fb_destroy(&edpy->blit_fb);
  64         egl_fb_setup_new_tex(&edpy->blit_fb, backing_width, backing_height);
  65     }
  66 }
  67
  68 static void egl_scanout_flush(DisplayChangeListener *dcl,
  69                               uint32_t x, uint32_t y,
  70                               uint32_t w, uint32_t h)
  71 {
  72     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
  73
  74     if (!edpy->guest_fb.texture || !edpy->ds) {
  75         return;
  76     }
  77     assert(surface_width(edpy->ds)  == edpy->guest_fb.width);
  78     assert(surface_height(edpy->ds) == edpy->guest_fb.height);
  79     assert(surface_format(edpy->ds) == PIXMAN_x8r8g8b8);
  80
  81     egl_fb_blit(&edpy->blit_fb, &edpy->guest_fb, edpy->y_0_top);
  82     egl_fb_read(surface_data(edpy->ds), &edpy->blit_fb);
  83
  84     dpy_gfx_update(edpy->dcl.con, x, y, w, h);
  85 }
  86
  87 static const DisplayChangeListenerOps egl_ops = {
  88     .dpy_name                = "egl-headless",
  89     .dpy_refresh             = egl_refresh,
  90     .dpy_gfx_update          = egl_gfx_update,
  91     .dpy_gfx_switch          = egl_gfx_switch,
  92
  93     .dpy_gl_ctx_create       = qemu_egl_create_context,
  94     .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
  95     .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
  96     .dpy_gl_ctx_get_current  = qemu_egl_get_current_context,
  97
  98     .dpy_gl_scanout_disable  = egl_scanout_disable,
  99     .dpy_gl_scanout_texture  = egl_scanout_texture,
 100     .dpy_gl_update           = egl_scanout_flush,
 101 };
 102
 103 void egl_headless_init(void)
 104 {
 105     QemuConsole *con;
 106     egl_dpy *edpy;
 107     int idx;
 108
 109     if (egl_rendernode_init(NULL) < 0) {
 110         error_report("egl: render node init failed");
 111         exit(1);
 112     }
 113
 114     for (idx = 0;; idx++) {
 115         con = qemu_console_lookup_by_index(idx);
 116         if (!con || !qemu_console_is_graphic(con)) {
 117             break;
 118         }
 119
 120         edpy = g_new0(egl_dpy, 1);
 121         edpy->dcl.con = con;
 122         edpy->dcl.ops = &egl_ops;
 123         register_displaychangelistener(&edpy->dcl);
 124     }
 125 }