ui/sdl2-gl.c

   1 /*
   2  * QEMU SDL display driver -- opengl support
   3  *
   4  * Copyright (c) 2014 Red Hat
   5  *
   6  * Authors:
   7  *     Gerd Hoffmann <kraxel@redhat.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  22  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25  * THE SOFTWARE.
  26  */
  27
  28 #include "qemu-common.h"
  29 #include "ui/console.h"
  30 #include "ui/input.h"
  31 #include "ui/sdl2.h"
  32 #include "sysemu/sysemu.h"
  33
  34 static void sdl2_gl_render_surface(struct sdl2_console *scon)
  35 {
  36     int ww, wh;
  37
  38     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  39
  40     SDL_GetWindowSize(scon->real_window, &ww, &wh);
  41     surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);
  42
  43     surface_gl_render_texture(scon->gls, scon->surface);
  44     SDL_GL_SwapWindow(scon->real_window);
  45 }
  46
  47 void sdl2_gl_update(DisplayChangeListener *dcl,
  48                     int x, int y, int w, int h)
  49 {
  50     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  51
  52     assert(scon->opengl);
  53
  54     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  55     surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h);
  56     scon->updates++;
  57 }
  58
  59 void sdl2_gl_switch(DisplayChangeListener *dcl,
  60                     DisplaySurface *new_surface)
  61 {
  62     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  63     DisplaySurface *old_surface = scon->surface;
  64
  65     assert(scon->opengl);
  66
  67     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  68     surface_gl_destroy_texture(scon->gls, scon->surface);
  69
  70     scon->surface = new_surface;
  71
  72     if (!new_surface) {
  73         console_gl_fini_context(scon->gls);
  74         scon->gls = NULL;
  75         sdl2_window_destroy(scon);
  76         return;
  77     }
  78
  79     if (!scon->real_window) {
  80         sdl2_window_create(scon);
  81         scon->gls = console_gl_init_context();
  82     } else if (old_surface &&
  83                ((surface_width(old_surface)  != surface_width(new_surface)) ||
  84                 (surface_height(old_surface) != surface_height(new_surface)))) {
  85         sdl2_window_resize(scon);
  86     }
  87
  88     surface_gl_create_texture(scon->gls, scon->surface);
  89 }
  90
  91 void sdl2_gl_refresh(DisplayChangeListener *dcl)
  92 {
  93     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  94
  95     assert(scon->opengl);
  96
  97     graphic_hw_update(dcl->con);
  98     if (scon->updates && scon->surface) {
  99         scon->updates = 0;
 100         sdl2_gl_render_surface(scon);
 101     }
 102     sdl2_poll_events(scon);
 103 }
 104
 105 void sdl2_gl_redraw(struct sdl2_console *scon)
 106 {
 107     assert(scon->opengl);
 108
 109     if (scon->surface) {
 110         sdl2_gl_render_surface(scon);
 111     }
 112 }