ui/gtk-gl-area.c

   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
  12 #include "trace.h"
  13
  14 #include "ui/console.h"
  15 #include "ui/gtk.h"
  16 #include "ui/egl-helpers.h"
  17
  18 #include "sysemu/sysemu.h"
  19
  20 static void gtk_gl_area_set_scanout_mode(VirtualConsole *vc, bool scanout)
  21 {
  22     if (vc->gfx.scanout_mode == scanout) {
  23         return;
  24     }
  25
  26     vc->gfx.scanout_mode = scanout;
  27     if (!vc->gfx.scanout_mode) {
  28         egl_fb_destroy(&vc->gfx.guest_fb);
  29         if (vc->gfx.surface) {
  30             surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
  31             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
  32         }
  33     }
  34 }
  35
  36 /** DisplayState Callbacks (opengl version) **/
  37
  38 void gd_gl_area_draw(VirtualConsole *vc)
  39 {
  40     int ww, wh, y1, y2;
  41
  42     if (!vc->gfx.gls) {
  43         return;
  44     }
  45
  46     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  47     ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area);
  48     wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area);
  49
  50     if (vc->gfx.scanout_mode) {
  51         if (!vc->gfx.guest_fb.framebuffer) {
  52             return;
  53         }
  54
  55         glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.guest_fb.framebuffer);
  56         /* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */
  57
  58         glViewport(0, 0, ww, wh);
  59         y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
  60         y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
  61         glBlitFramebuffer(0, y1, vc->gfx.w, y2,
  62                           0, 0, ww, wh,
  63                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
  64     } else {
  65         if (!vc->gfx.ds) {
  66             return;
  67         }
  68         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  69
  70         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
  71         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
  72     }
  73
  74     glFlush();
  75     graphic_hw_gl_flushed(vc->gfx.dcl.con);
  76 }
  77
  78 void gd_gl_area_update(DisplayChangeListener *dcl,
  79                    int x, int y, int w, int h)
  80 {
  81     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
  82
  83     if (!vc->gfx.gls || !vc->gfx.ds) {
  84         return;
  85     }
  86
  87     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  88     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
  89     vc->gfx.glupdates++;
  90 }
  91
  92 void gd_gl_area_refresh(DisplayChangeListener *dcl)
  93 {
  94     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
  95
  96     if (!vc->gfx.gls) {
  97         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
  98             return;
  99         }
 100         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 101         vc->gfx.gls = qemu_gl_init_shader();
 102         if (vc->gfx.ds) {
 103             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 104         }
 105     }
 106
 107     graphic_hw_update(dcl->con);
 108
 109     if (vc->gfx.glupdates) {
 110         vc->gfx.glupdates = 0;
 111         gtk_gl_area_set_scanout_mode(vc, false);
 112         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 113     }
 114 }
 115
 116 void gd_gl_area_switch(DisplayChangeListener *dcl,
 117                        DisplaySurface *surface)
 118 {
 119     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 120     bool resized = true;
 121
 122     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 123
 124     if (vc->gfx.ds &&
 125         surface_width(vc->gfx.ds) == surface_width(surface) &&
 126         surface_height(vc->gfx.ds) == surface_height(surface)) {
 127         resized = false;
 128     }
 129
 130     if (vc->gfx.gls) {
 131         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 132         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 133         surface_gl_create_texture(vc->gfx.gls, surface);
 134     }
 135     vc->gfx.ds = surface;
 136
 137     if (resized) {
 138         gd_update_windowsize(vc);
 139     }
 140 }
 141
 142 QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
 143                                         QEMUGLParams *params)
 144 {
 145     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 146     GdkWindow *window;
 147     GdkGLContext *ctx;
 148     GError *err = NULL;
 149
 150     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 151     window = gtk_widget_get_window(vc->gfx.drawing_area);
 152     ctx = gdk_window_create_gl_context(window, &err);
 153     if (err) {
 154         g_printerr("Create gdk gl context failed: %s\n", err->message);
 155         g_error_free(err);
 156         return NULL;
 157     }
 158     gdk_gl_context_set_required_version(ctx,
 159                                         params->major_ver,
 160                                         params->minor_ver);
 161     gdk_gl_context_realize(ctx, &err);
 162     if (err) {
 163         g_printerr("Realize gdk gl context failed: %s\n", err->message);
 164         g_error_free(err);
 165         g_clear_object(&ctx);
 166         return NULL;
 167     }
 168     return ctx;
 169 }
 170
 171 void gd_gl_area_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
 172 {
 173     /* FIXME */
 174 }
 175
 176 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
 177                                 uint32_t backing_id,
 178                                 bool backing_y_0_top,
 179                                 uint32_t backing_width,
 180                                 uint32_t backing_height,
 181                                 uint32_t x, uint32_t y,
 182                                 uint32_t w, uint32_t h)
 183 {
 184     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 185
 186     vc->gfx.x = x;
 187     vc->gfx.y = y;
 188     vc->gfx.w = w;
 189     vc->gfx.h = h;
 190     vc->gfx.y0_top = backing_y_0_top;
 191
 192     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 193
 194     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
 195         gtk_gl_area_set_scanout_mode(vc, false);
 196         return;
 197     }
 198
 199     gtk_gl_area_set_scanout_mode(vc, true);
 200     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 201                          backing_id, false);
 202 }
 203
 204 void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
 205 {
 206     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 207
 208     gtk_gl_area_set_scanout_mode(vc, false);
 209 }
 210
 211 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
 212                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 213 {
 214     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 215
 216     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 217 }
 218
 219 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
 220                                QemuDmaBuf *dmabuf)
 221 {
 222 #ifdef CONFIG_GBM
 223     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 224
 225     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 226     egl_dmabuf_import_texture(dmabuf);
 227     if (!dmabuf->texture) {
 228         return;
 229     }
 230
 231     gd_gl_area_scanout_texture(dcl, dmabuf->texture,
 232                                false, dmabuf->width, dmabuf->height,
 233                                0, 0, dmabuf->width, dmabuf->height);
 234 #endif
 235 }
 236
 237 void gtk_gl_area_init(void)
 238 {
 239     display_opengl = 1;
 240 }
 241
 242 int gd_gl_area_make_current(DisplayChangeListener *dcl,
 243                             QEMUGLContext ctx)
 244 {
 245     gdk_gl_context_make_current(ctx);
 246     return 0;
 247 }