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 if (vc->gfx.fbo_id) { 30 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, 31 GL_COLOR_ATTACHMENT0_EXT, 32 GL_TEXTURE_2D, 0, 0); 33 glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0); 34 glDeleteFramebuffers(1, &vc->gfx.fbo_id); 35 vc->gfx.fbo_id = 0; 36 } 37 if (vc->gfx.surface) { 38 surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds); 39 surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds); 40 } 41 } 42 } 43 44 /** DisplayState Callbacks (opengl version) **/ 45 46 void gd_gl_area_draw(VirtualConsole *vc) 47 { 48 int ww, wh, y1, y2; 49 50 if (!vc->gfx.gls) { 51 return; 52 } 53 54 gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area)); 55 ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area); 56 wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area); 57 58 if (vc->gfx.scanout_mode) { 59 if (!vc->gfx.fbo_id) { 60 return; 61 } 62 63 glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.fbo_id); 64 /* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */ 65 66 glViewport(0, 0, ww, wh); 67 y1 = vc->gfx.y0_top ? 0 : vc->gfx.h; 68 y2 = vc->gfx.y0_top ? vc->gfx.h : 0; 69 glBlitFramebuffer(0, y1, vc->gfx.w, y2, 70 0, 0, ww, wh, 71 GL_COLOR_BUFFER_BIT, GL_NEAREST); 72 } else { 73 if (!vc->gfx.ds) { 74 return; 75 } 76 gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area)); 77 78 surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh); 79 surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds); 80 } 81 } 82 83 void gd_gl_area_update(DisplayChangeListener *dcl, 84 int x, int y, int w, int h) 85 { 86 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); 87 88 if (!vc->gfx.gls || !vc->gfx.ds) { 89 return; 90 } 91 92 gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area)); 93 surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h); 94 vc->gfx.glupdates++; 95 } 96 97 void gd_gl_area_refresh(DisplayChangeListener *dcl) 98 { 99 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); 100 101 if (!vc->gfx.gls) { 102 if (!gtk_widget_get_realized(vc->gfx.drawing_area)) { 103 return; 104 } 105 gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area)); 106 vc->gfx.gls = console_gl_init_context(); 107 if (vc->gfx.ds) { 108 surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds); 109 } 110 } 111 112 graphic_hw_update(dcl->con); 113 114 if (vc->gfx.glupdates) { 115 vc->gfx.glupdates = 0; 116 gtk_gl_area_set_scanout_mode(vc, false); 117 gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area)); 118 } 119 } 120 121 void gd_gl_area_switch(DisplayChangeListener *dcl, 122 DisplaySurface *surface) 123 { 124 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); 125 bool resized = true; 126 127 trace_gd_switch(vc->label, surface_width(surface), surface_height(surface)); 128 129 if (vc->gfx.ds && 130 surface_width(vc->gfx.ds) == surface_width(surface) && 131 surface_height(vc->gfx.ds) == surface_height(surface)) { 132 resized = false; 133 } 134 135 if (vc->gfx.gls) { 136 gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area)); 137 surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds); 138 surface_gl_create_texture(vc->gfx.gls, surface); 139 } 140 vc->gfx.ds = surface; 141 142 if (resized) { 143 gd_update_windowsize(vc); 144 } 145 } 146 147 QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl, 148 QEMUGLParams *params) 149 { 150 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); 151 GdkWindow *window; 152 GdkGLContext *ctx; 153 GError *err = NULL; 154 155 gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area)); 156 window = gtk_widget_get_window(vc->gfx.drawing_area); 157 ctx = gdk_window_create_gl_context(window, &err); 158 gdk_gl_context_set_required_version(ctx, 159 params->major_ver, 160 params->minor_ver); 161 gdk_gl_context_realize(ctx, &err); 162 return ctx; 163 } 164 165 void gd_gl_area_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx) 166 { 167 /* FIXME */ 168 } 169 170 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl, 171 uint32_t backing_id, 172 bool backing_y_0_top, 173 uint32_t backing_width, 174 uint32_t backing_height, 175 uint32_t x, uint32_t y, 176 uint32_t w, uint32_t h) 177 { 178 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); 179 180 vc->gfx.x = x; 181 vc->gfx.y = y; 182 vc->gfx.w = w; 183 vc->gfx.h = h; 184 vc->gfx.tex_id = backing_id; 185 vc->gfx.y0_top = backing_y_0_top; 186 187 gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area)); 188 189 if (vc->gfx.tex_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) { 190 gtk_gl_area_set_scanout_mode(vc, false); 191 return; 192 } 193 194 gtk_gl_area_set_scanout_mode(vc, true); 195 if (!vc->gfx.fbo_id) { 196 glGenFramebuffers(1, &vc->gfx.fbo_id); 197 } 198 199 glBindFramebuffer(GL_FRAMEBUFFER_EXT, vc->gfx.fbo_id); 200 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, 201 GL_TEXTURE_2D, vc->gfx.tex_id, 0); 202 } 203 204 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl, 205 uint32_t x, uint32_t y, uint32_t w, uint32_t h) 206 { 207 VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl); 208 209 gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area)); 210 } 211 212 void gtk_gl_area_init(void) 213 { 214 display_opengl = 1; 215 } 216 217 QEMUGLContext gd_gl_area_get_current_context(DisplayChangeListener *dcl) 218 { 219 return gdk_gl_context_get_current(); 220 } 221 222 int gd_gl_area_make_current(DisplayChangeListener *dcl, 223 QEMUGLContext ctx) 224 { 225 gdk_gl_context_make_current(ctx); 226 return 0; 227 } 228