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 #include "qemu-common.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     int ww, wh, y1, y2;
  42
  43     if (!vc->gfx.gls) {
  44         return;
  45     }
  46
  47     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  48     ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area);
  49     wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area);
  50
  51     if (vc->gfx.scanout_mode) {
  52         if (!vc->gfx.guest_fb.framebuffer) {
  53             return;
  54         }
  55
  56         glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.guest_fb.framebuffer);
  57         /* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */
  58
  59         glViewport(0, 0, ww, wh);
  60         y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
  61         y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
  62         glBlitFramebuffer(0, y1, vc->gfx.w, y2,
  63                           0, 0, ww, wh,
  64                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
  65     } else {
  66         if (!vc->gfx.ds) {
  67             return;
  68         }
  69         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  70
  71         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
  72         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
  73     }
  74 }
  75
  76 void gd_gl_area_update(DisplayChangeListener *dcl,
  77                    int x, int y, int w, int h)
  78 {
  79     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
  80
  81     if (!vc->gfx.gls || !vc->gfx.ds) {
  82         return;
  83     }
  84
  85     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  86     surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
  87     vc->gfx.glupdates++;
  88 }
  89
  90 void gd_gl_area_refresh(DisplayChangeListener *dcl)
  91 {
  92     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
  93
  94     if (!vc->gfx.gls) {
  95         if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
  96             return;
  97         }
  98         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
  99         vc->gfx.gls = qemu_gl_init_shader();
 100         if (vc->gfx.ds) {
 101             surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
 102         }
 103     }
 104
 105     graphic_hw_update(dcl->con);
 106
 107     if (vc->gfx.glupdates) {
 108         vc->gfx.glupdates = 0;
 109         gtk_gl_area_set_scanout_mode(vc, false);
 110         gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 111     }
 112 }
 113
 114 void gd_gl_area_switch(DisplayChangeListener *dcl,
 115                        DisplaySurface *surface)
 116 {
 117     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 118     bool resized = true;
 119
 120     trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
 121
 122     if (vc->gfx.ds &&
 123         surface_width(vc->gfx.ds) == surface_width(surface) &&
 124         surface_height(vc->gfx.ds) == surface_height(surface)) {
 125         resized = false;
 126     }
 127
 128     if (vc->gfx.gls) {
 129         gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 130         surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
 131         surface_gl_create_texture(vc->gfx.gls, surface);
 132     }
 133     vc->gfx.ds = surface;
 134
 135     if (resized) {
 136         gd_update_windowsize(vc);
 137     }
 138 }
 139
 140 QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
 141                                         QEMUGLParams *params)
 142 {
 143     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 144     GdkWindow *window;
 145     GdkGLContext *ctx;
 146     GError *err = NULL;
 147
 148     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 149     window = gtk_widget_get_window(vc->gfx.drawing_area);
 150     ctx = gdk_window_create_gl_context(window, &err);
 151     gdk_gl_context_set_required_version(ctx,
 152                                         params->major_ver,
 153                                         params->minor_ver);
 154     gdk_gl_context_realize(ctx, &err);
 155     return ctx;
 156 }
 157
 158 void gd_gl_area_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
 159 {
 160     /* FIXME */
 161 }
 162
 163 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
 164                                 uint32_t backing_id,
 165                                 bool backing_y_0_top,
 166                                 uint32_t backing_width,
 167                                 uint32_t backing_height,
 168                                 uint32_t x, uint32_t y,
 169                                 uint32_t w, uint32_t h)
 170 {
 171     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 172
 173     vc->gfx.x = x;
 174     vc->gfx.y = y;
 175     vc->gfx.w = w;
 176     vc->gfx.h = h;
 177     vc->gfx.y0_top = backing_y_0_top;
 178
 179     gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
 180
 181     if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
 182         gtk_gl_area_set_scanout_mode(vc, false);
 183         return;
 184     }
 185
 186     gtk_gl_area_set_scanout_mode(vc, true);
 187     egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
 188                          backing_id, false);
 189 }
 190
 191 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
 192                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 193 {
 194     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 195
 196     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 197 }
 198
 199 void gtk_gl_area_init(void)
 200 {
 201     display_opengl = 1;
 202 }
 203
 204 QEMUGLContext gd_gl_area_get_current_context(DisplayChangeListener *dcl)
 205 {
 206     return gdk_gl_context_get_current();
 207 }
 208
 209 int gd_gl_area_make_current(DisplayChangeListener *dcl,
 210                             QEMUGLContext ctx)
 211 {
 212     gdk_gl_context_make_current(ctx);
 213     return 0;
 214 }