qemu

FORK: QEMU emulator
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gtk-gl-area.c (9160B)

      1 /*
      2  * GTK UI -- glarea opengl code.
      3  *
      4  * Requires 3.16+ (GtkGLArea widget).
      5  *
      6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
      7  * See the COPYING file in the top-level directory.
      8  */
      9 
     10 #include "qemu/osdep.h"
     11 #include "qemu/main-loop.h"
     12 
     13 #include "trace.h"
     14 
     15 #include "ui/console.h"
     16 #include "ui/gtk.h"
     17 #include "ui/egl-helpers.h"
     18 
     19 #include "sysemu/sysemu.h"
     20 
     21 static void gtk_gl_area_set_scanout_mode(VirtualConsole *vc, bool scanout)
     22 {
     23     if (vc->gfx.scanout_mode == scanout) {
     24         return;
     25     }
     26 
     27     vc->gfx.scanout_mode = scanout;
     28     if (!vc->gfx.scanout_mode) {
     29         egl_fb_destroy(&vc->gfx.guest_fb);
     30         if (vc->gfx.surface) {
     31             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
     32             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
     33         }
     34     }
     35 }
     36 
     37 /** DisplayState Callbacks (opengl version) **/
     38 
     39 void gd_gl_area_draw(VirtualConsole *vc)
     40 {
     41 #ifdef CONFIG_GBM
     42     QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
     43 #endif
     44     int ww, wh, ws, y1, y2;
     45 
     46     if (!vc->gfx.gls) {
     47         return;
     48     }
     49 
     50     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
     51     ws = gdk_window_get_scale_factor(gtk_widget_get_window(vc->gfx.drawing_area));
     52     ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area) * ws;
     53     wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area) * ws;
     54 
     55     if (vc->gfx.scanout_mode) {
     56         if (!vc->gfx.guest_fb.framebuffer) {
     57             return;
     58         }
     59 
     60 #ifdef CONFIG_GBM
     61         if (dmabuf) {
     62             if (!dmabuf->draw_submitted) {
     63                 return;
     64             } else {
     65                 dmabuf->draw_submitted = false;
     66             }
     67         }
     68 #endif
     69 
     70         glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.guest_fb.framebuffer);
     71         /* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */
     72 
     73         glViewport(0, 0, ww, wh);
     74         y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
     75         y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
     76         glBlitFramebuffer(0, y1, vc->gfx.w, y2,
     77                           0, 0, ww, wh,
     78                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
     79 #ifdef CONFIG_GBM
     80         if (dmabuf) {
     81             egl_dmabuf_create_sync(dmabuf);
     82         }
     83 #endif
     84         glFlush();
     85 #ifdef CONFIG_GBM
     86         if (dmabuf) {
     87             egl_dmabuf_create_fence(dmabuf);
     88             if (dmabuf->fence_fd > 0) {
     89                 qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
     90                 return;
     91             }
     92             graphic_hw_gl_block(vc->gfx.dcl.con, false);
     93         }
     94 #endif
     95     } else {
     96         if (!vc->gfx.ds) {
     97             return;
     98         }
     99         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
    100 
    101         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
    102         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
    103     }
    104 }
    105 
    106 void gd_gl_area_update(DisplayChangeListener *dcl,
    107                    int x, int y, int w, int h)
    108 {
    109     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
    110 
    111     if (!vc->gfx.gls || !vc->gfx.ds) {
    112         return;
    113     }
    114 
    115     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
    116     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
    117     vc->gfx.glupdates++;
    118 }
    119 
    120 void gd_gl_area_refresh(DisplayChangeListener *dcl)
    121 {
    122     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
    123 
    124     gd_update_monitor_refresh_rate(vc, vc->window ? vc->window : vc->gfx.drawing_area);
    125 
    126     if (!vc->gfx.gls) {
    127         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
    128             return;
    129         }
    130         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
    131         vc->gfx.gls = qemu_gl_init_shader();
    132         if (vc->gfx.ds) {
    133             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
    134         }
    135     }
    136 
    137     graphic_hw_update(dcl->con);
    138 
    139     if (vc->gfx.glupdates) {
    140         vc->gfx.glupdates = 0;
    141         gtk_gl_area_set_scanout_mode(vc, false);
    142         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
    143     }
    144 }
    145 
    146 void gd_gl_area_switch(DisplayChangeListener *dcl,
    147                        DisplaySurface *surface)
    148 {
    149     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
    150     bool resized = true;
    151 
    152     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
    153 
    154     if (vc->gfx.ds &&
    155         surface_width(vc->gfx.ds) == surface_width(surface) &&
    156         surface_height(vc->gfx.ds) == surface_height(surface)) {
    157         resized = false;
    158     }
    159 
    160     if (vc->gfx.gls) {
    161         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
    162         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
    163         surface_gl_create_texture(vc->gfx.gls, surface);
    164     }
    165     vc->gfx.ds = surface;
    166 
    167     if (resized) {
    168         gd_update_windowsize(vc);
    169     }
    170 }
    171 
    172 static int gd_cmp_gl_context_version(int major, int minor, QEMUGLParams *params)
    173 {
    174     if (major > params->major_ver) {
    175         return 1;
    176     }
    177     if (major < params->major_ver) {
    178         return -1;
    179     }
    180     if (minor > params->minor_ver) {
    181         return 1;
    182     }
    183     if (minor < params->minor_ver) {
    184         return -1;
    185     }
    186     return 0;
    187 }
    188 
    189 QEMUGLContext gd_gl_area_create_context(DisplayGLCtx *dgc,
    190                                         QEMUGLParams *params)
    191 {
    192     VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
    193     GdkWindow *window;
    194     GdkGLContext *ctx;
    195     GError *err = NULL;
    196     int major, minor;
    197 
    198     window = gtk_widget_get_window(vc->gfx.drawing_area);
    199     ctx = gdk_window_create_gl_context(window, &err);
    200     if (err) {
    201         g_printerr("Create gdk gl context failed: %s\n", err->message);
    202         g_error_free(err);
    203         return NULL;
    204     }
    205     gdk_gl_context_set_required_version(ctx,
    206                                         params->major_ver,
    207                                         params->minor_ver);
    208     gdk_gl_context_realize(ctx, &err);
    209     if (err) {
    210         g_printerr("Realize gdk gl context failed: %s\n", err->message);
    211         g_error_free(err);
    212         g_clear_object(&ctx);
    213         return NULL;
    214     }
    215 
    216     gdk_gl_context_make_current(ctx);
    217     gdk_gl_context_get_version(ctx, &major, &minor);
    218     gdk_gl_context_clear_current();
    219     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
    220 
    221     if (gd_cmp_gl_context_version(major, minor, params) == -1) {
    222         /* created ctx version < requested version */
    223         g_clear_object(&ctx);
    224     }
    225 
    226     trace_gd_gl_area_create_context(ctx, params->major_ver, params->minor_ver);
    227     return ctx;
    228 }
    229 
    230 void gd_gl_area_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
    231 {
    232     GdkGLContext *current_ctx = gdk_gl_context_get_current();
    233 
    234     trace_gd_gl_area_destroy_context(ctx, current_ctx);
    235     if (ctx == current_ctx) {
    236         gdk_gl_context_clear_current();
    237     }
    238     g_clear_object(&ctx);
    239 }
    240 
    241 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
    242                                 uint32_t backing_id,
    243                                 bool backing_y_0_top,
    244                                 uint32_t backing_width,
    245                                 uint32_t backing_height,
    246                                 uint32_t x, uint32_t y,
    247                                 uint32_t w, uint32_t h)
    248 {
    249     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
    250 
    251     vc->gfx.x = x;
    252     vc->gfx.y = y;
    253     vc->gfx.w = w;
    254     vc->gfx.h = h;
    255     vc->gfx.y0_top = backing_y_0_top;
    256 
    257     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
    258 
    259     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
    260         gtk_gl_area_set_scanout_mode(vc, false);
    261         return;
    262     }
    263 
    264     gtk_gl_area_set_scanout_mode(vc, true);
    265     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
    266                          backing_id, false);
    267 }
    268 
    269 void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
    270 {
    271     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
    272 
    273     gtk_gl_area_set_scanout_mode(vc, false);
    274 }
    275 
    276 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
    277                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
    278 {
    279     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
    280 
    281     if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
    282         graphic_hw_gl_block(vc->gfx.dcl.con, true);
    283         vc->gfx.guest_fb.dmabuf->draw_submitted = true;
    284     }
    285     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
    286 }
    287 
    288 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
    289                                QemuDmaBuf *dmabuf)
    290 {
    291 #ifdef CONFIG_GBM
    292     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
    293 
    294     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
    295     egl_dmabuf_import_texture(dmabuf);
    296     if (!dmabuf->texture) {
    297         return;
    298     }
    299 
    300     gd_gl_area_scanout_texture(dcl, dmabuf->texture,
    301                                false, dmabuf->width, dmabuf->height,
    302                                0, 0, dmabuf->width, dmabuf->height);
    303 
    304     if (dmabuf->allow_fences) {
    305         vc->gfx.guest_fb.dmabuf = dmabuf;
    306     }
    307 #endif
    308 }
    309 
    310 void gtk_gl_area_init(void)
    311 {
    312     display_opengl = 1;
    313 }
    314 
    315 int gd_gl_area_make_current(DisplayGLCtx *dgc,
    316                             QEMUGLContext ctx)
    317 {
    318     gdk_gl_context_make_current(ctx);
    319     return 0;
    320 }