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
  75 void gd_gl_area_update(DisplayChangeListener *dcl,
  76                    int x, int y, int w, int h)
  77 {
  78     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
  79
  80     if (!vc->gfx.gls || !vc->gfx.ds) {
  81         return;
  82     }
  83
  84     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  85     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
  86     vc->gfx.glupdates++;
  87 }
  88
  89 void gd_gl_area_refresh(DisplayChangeListener *dcl)
  90 {
  91     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
  92
  93     if (!vc->gfx.gls) {
  94         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
  95             return;
  96         }
  97         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  98         vc->gfx.gls = qemu_gl_init_shader();
  99         if (vc->gfx.ds) {
 100             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 101         }
 102     }
 103
 104     graphic_hw_update(dcl->con);
 105
 106     if (vc->gfx.glupdates) {
 107         vc->gfx.glupdates = 0;
 108         gtk_gl_area_set_scanout_mode(vc, false);
 109         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 110     }
 111 }
 112
 113 void gd_gl_area_switch(DisplayChangeListener *dcl,
 114                        DisplaySurface *surface)
 115 {
 116     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 117     bool resized = true;
 118
 119     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 120
 121     if (vc->gfx.ds &&
 122         surface_width(vc->gfx.ds) == surface_width(surface) &&
 123         surface_height(vc->gfx.ds) == surface_height(surface)) {
 124         resized = false;
 125     }
 126
 127     if (vc->gfx.gls) {
 128         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 129         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 130         surface_gl_create_texture(vc->gfx.gls, surface);
 131     }
 132     vc->gfx.ds = surface;
 133
 134     if (resized) {
 135         gd_update_windowsize(vc);
 136     }
 137 }
 138
 139 QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
 140                                         QEMUGLParams *params)
 141 {
 142     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 143     GdkWindow *window;
 144     GdkGLContext *ctx;
 145     GError *err = NULL;
 146
 147     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 148     window = gtk_widget_get_window(vc->gfx.drawing_area);
 149     ctx = gdk_window_create_gl_context(window, &err);
 150     gdk_gl_context_set_required_version(ctx,
 151                                         params->major_ver,
 152                                         params->minor_ver);
 153     gdk_gl_context_realize(ctx, &err);
 154     return ctx;
 155 }
 156
 157 void gd_gl_area_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
 158 {
 159     /* FIXME */
 160 }
 161
 162 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
 163                                 uint32_t backing_id,
 164                                 bool backing_y_0_top,
 165                                 uint32_t backing_width,
 166                                 uint32_t backing_height,
 167                                 uint32_t x, uint32_t y,
 168                                 uint32_t w, uint32_t h)
 169 {
 170     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 171
 172     vc->gfx.x = x;
 173     vc->gfx.y = y;
 174     vc->gfx.w = w;
 175     vc->gfx.h = h;
 176     vc->gfx.y0_top = backing_y_0_top;
 177
 178     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 179
 180     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
 181         gtk_gl_area_set_scanout_mode(vc, false);
 182         return;
 183     }
 184
 185     gtk_gl_area_set_scanout_mode(vc, true);
 186     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 187                          backing_id, false);
 188 }
 189
 190 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
 191                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 192 {
 193     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 194
 195     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 196 }
 197
 198 void gtk_gl_area_init(void)
 199 {
 200     display_opengl = 1;
 201 }
 202
 203 QEMUGLContext gd_gl_area_get_current_context(DisplayChangeListener *dcl)
 204 {
 205     return gdk_gl_context_get_current();
 206 }
 207
 208 int gd_gl_area_make_current(DisplayChangeListener *dcl,
 209                             QEMUGLContext ctx)
 210 {
 211     gdk_gl_context_make_current(ctx);
 212     return 0;
 213 }