ui/egl-headless.c

   1 #include "qemu/osdep.h"
   2 #include "qemu/module.h"
   3 #include "sysemu/sysemu.h"
   4 #include "ui/console.h"
   5 #include "ui/egl-helpers.h"
   6 #include "ui/egl-context.h"
   7 #include "ui/shader.h"
   8
   9 typedef struct egl_dpy {
  10     DisplayChangeListener dcl;
  11     DisplaySurface *ds;
  12     QemuGLShader *gls;
  13     egl_fb guest_fb;
  14     egl_fb cursor_fb;
  15     egl_fb blit_fb;
  16     bool y_0_top;
  17     uint32_t pos_x;
  18     uint32_t pos_y;
  19 } egl_dpy;
  20
  21 /* ------------------------------------------------------------------ */
  22
  23 static void egl_refresh(DisplayChangeListener *dcl)
  24 {
  25     graphic_hw_update(dcl->con);
  26 }
  27
  28 static void egl_gfx_update(DisplayChangeListener *dcl,
  29                            int x, int y, int w, int h)
  30 {
  31 }
  32
  33 static void egl_gfx_switch(DisplayChangeListener *dcl,
  34                            struct DisplaySurface *new_surface)
  35 {
  36     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
  37
  38     edpy->ds = new_surface;
  39 }
  40
  41 static QEMUGLContext egl_create_context(DisplayGLCtx *dgc,
  42                                         QEMUGLParams *params)
  43 {
  44     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
  45                    qemu_egl_rn_ctx);
  46     return qemu_egl_create_context(dgc, params);
  47 }
  48
  49 static void egl_scanout_disable(DisplayChangeListener *dcl)
  50 {
  51     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
  52
  53     egl_fb_destroy(&edpy->guest_fb);
  54     egl_fb_destroy(&edpy->blit_fb);
  55 }
  56
  57 static void egl_scanout_texture(DisplayChangeListener *dcl,
  58                                 uint32_t backing_id,
  59                                 bool backing_y_0_top,
  60                                 uint32_t backing_width,
  61                                 uint32_t backing_height,
  62                                 uint32_t x, uint32_t y,
  63                                 uint32_t w, uint32_t h)
  64 {
  65     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
  66
  67     edpy->y_0_top = backing_y_0_top;
  68
  69     /* source framebuffer */
  70     egl_fb_setup_for_tex(&edpy->guest_fb,
  71                          backing_width, backing_height, backing_id, false);
  72
  73     /* dest framebuffer */
  74     if (edpy->blit_fb.width  != backing_width ||
  75         edpy->blit_fb.height != backing_height) {
  76         egl_fb_destroy(&edpy->blit_fb);
  77         egl_fb_setup_new_tex(&edpy->blit_fb, backing_width, backing_height);
  78     }
  79 }
  80
  81 static void egl_scanout_dmabuf(DisplayChangeListener *dcl,
  82                                QemuDmaBuf *dmabuf)
  83 {
  84     egl_dmabuf_import_texture(dmabuf);
  85     if (!dmabuf->texture) {
  86         return;
  87     }
  88
  89     egl_scanout_texture(dcl, dmabuf->texture,
  90                         false, dmabuf->width, dmabuf->height,
  91                         0, 0, dmabuf->width, dmabuf->height);
  92 }
  93
  94 static void egl_cursor_dmabuf(DisplayChangeListener *dcl,
  95                               QemuDmaBuf *dmabuf, bool have_hot,
  96                               uint32_t hot_x, uint32_t hot_y)
  97 {
  98     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
  99
 100     if (dmabuf) {
 101         egl_dmabuf_import_texture(dmabuf);
 102         if (!dmabuf->texture) {
 103             return;
 104         }
 105         egl_fb_setup_for_tex(&edpy->cursor_fb, dmabuf->width, dmabuf->height,
 106                              dmabuf->texture, false);
 107     } else {
 108         egl_fb_destroy(&edpy->cursor_fb);
 109     }
 110 }
 111
 112 static void egl_cursor_position(DisplayChangeListener *dcl,
 113                                 uint32_t pos_x, uint32_t pos_y)
 114 {
 115     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
 116
 117     edpy->pos_x = pos_x;
 118     edpy->pos_y = pos_y;
 119 }
 120
 121 static void egl_release_dmabuf(DisplayChangeListener *dcl,
 122                                QemuDmaBuf *dmabuf)
 123 {
 124     egl_dmabuf_release_texture(dmabuf);
 125 }
 126
 127 static void egl_scanout_flush(DisplayChangeListener *dcl,
 128                               uint32_t x, uint32_t y,
 129                               uint32_t w, uint32_t h)
 130 {
 131     egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
 132
 133     if (!edpy->guest_fb.texture || !edpy->ds) {
 134         return;
 135     }
 136     assert(surface_format(edpy->ds) == PIXMAN_x8r8g8b8);
 137
 138     if (edpy->cursor_fb.texture) {
 139         /* have cursor -> render using textures */
 140         egl_texture_blit(edpy->gls, &edpy->blit_fb, &edpy->guest_fb,
 141                          !edpy->y_0_top);
 142         egl_texture_blend(edpy->gls, &edpy->blit_fb, &edpy->cursor_fb,
 143                           !edpy->y_0_top, edpy->pos_x, edpy->pos_y,
 144                           1.0, 1.0);
 145     } else {
 146         /* no cursor -> use simple framebuffer blit */
 147         egl_fb_blit(&edpy->blit_fb, &edpy->guest_fb, edpy->y_0_top);
 148     }
 149
 150     egl_fb_read(edpy->ds, &edpy->blit_fb);
 151     dpy_gfx_update(edpy->dcl.con, x, y, w, h);
 152 }
 153
 154 static const DisplayChangeListenerOps egl_ops = {
 155     .dpy_name                = "egl-headless",
 156     .dpy_refresh             = egl_refresh,
 157     .dpy_gfx_update          = egl_gfx_update,
 158     .dpy_gfx_switch          = egl_gfx_switch,
 159
 160     .dpy_gl_scanout_disable  = egl_scanout_disable,
 161     .dpy_gl_scanout_texture  = egl_scanout_texture,
 162     .dpy_gl_scanout_dmabuf   = egl_scanout_dmabuf,
 163     .dpy_gl_cursor_dmabuf    = egl_cursor_dmabuf,
 164     .dpy_gl_cursor_position  = egl_cursor_position,
 165     .dpy_gl_release_dmabuf   = egl_release_dmabuf,
 166     .dpy_gl_update           = egl_scanout_flush,
 167 };
 168
 169 static bool
 170 egl_is_compatible_dcl(DisplayGLCtx *dgc,
 171                       DisplayChangeListener *dcl)
 172 {
 173     if (!dcl->ops->dpy_gl_update) {
 174         /*
 175          * egl-headless is compatible with all 2d listeners, as it blits the GL
 176          * updates on the 2d console surface.
 177          */
 178         return true;
 179     }
 180
 181     return dcl->ops == &egl_ops;
 182 }
 183
 184 static const DisplayGLCtxOps eglctx_ops = {
 185     .dpy_gl_ctx_is_compatible_dcl = egl_is_compatible_dcl,
 186     .dpy_gl_ctx_create       = egl_create_context,
 187     .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
 188     .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
 189 };
 190
 191 static void early_egl_headless_init(DisplayOptions *opts)
 192 {
 193     display_opengl = 1;
 194 }
 195
 196 static void egl_headless_init(DisplayState *ds, DisplayOptions *opts)
 197 {
 198     DisplayGLMode mode = opts->has_gl ? opts->gl : DISPLAYGL_MODE_ON;
 199     QemuConsole *con;
 200     egl_dpy *edpy;
 201     int idx;
 202
 203     if (egl_rendernode_init(opts->u.egl_headless.rendernode, mode) < 0) {
 204         error_report("egl: render node init failed");
 205         exit(1);
 206     }
 207
 208     for (idx = 0;; idx++) {
 209         DisplayGLCtx *ctx;
 210
 211         con = qemu_console_lookup_by_index(idx);
 212         if (!con || !qemu_console_is_graphic(con)) {
 213             break;
 214         }
 215
 216         edpy = g_new0(egl_dpy, 1);
 217         edpy->dcl.con = con;
 218         edpy->dcl.ops = &egl_ops;
 219         edpy->gls = qemu_gl_init_shader();
 220         ctx = g_new0(DisplayGLCtx, 1);
 221         ctx->ops = &eglctx_ops;
 222         qemu_console_set_display_gl_ctx(con, ctx);
 223         register_displaychangelistener(&edpy->dcl);
 224     }
 225 }
 226
 227 static QemuDisplay qemu_display_egl = {
 228     .type       = DISPLAY_TYPE_EGL_HEADLESS,
 229     .early_init = early_egl_headless_init,
 230     .init       = egl_headless_init,
 231 };
 232
 233 static void register_egl(void)
 234 {
 235     qemu_display_register(&qemu_display_egl);
 236 }
 237
 238 type_init(register_egl);
 239
 240 module_dep("ui-opengl");