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/osdep.h"
  29 #include "qemu-common.h"
  30 #include "ui/console.h"
  31 #include "ui/input.h"
  32 #include "ui/sdl2.h"
  33 #include "sysemu/sysemu.h"
  34
  35 static void sdl2_set_scanout_mode(struct sdl2_console *scon, bool scanout)
  36 {
  37     if (scon->scanout_mode == scanout) {
  38         return;
  39     }
  40
  41     scon->scanout_mode = scanout;
  42     if (!scon->scanout_mode) {
  43         egl_fb_destroy(&scon->guest_fb);
  44         if (scon->surface) {
  45             surface_gl_destroy_texture(scon->gls, scon->surface);
  46             surface_gl_create_texture(scon->gls, scon->surface);
  47         }
  48     }
  49 }
  50
  51 static void sdl2_gl_render_surface(struct sdl2_console *scon)
  52 {
  53     int ww, wh;
  54
  55     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  56     sdl2_set_scanout_mode(scon, false);
  57
  58     SDL_GetWindowSize(scon->real_window, &ww, &wh);
  59     surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);
  60
  61     surface_gl_render_texture(scon->gls, scon->surface);
  62     SDL_GL_SwapWindow(scon->real_window);
  63 }
  64
  65 void sdl2_gl_update(DisplayChangeListener *dcl,
  66                     int x, int y, int w, int h)
  67 {
  68     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  69
  70     assert(scon->opengl);
  71
  72     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  73     surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h);
  74     scon->updates++;
  75 }
  76
  77 void sdl2_gl_switch(DisplayChangeListener *dcl,
  78                     DisplaySurface *new_surface)
  79 {
  80     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  81     DisplaySurface *old_surface = scon->surface;
  82
  83     assert(scon->opengl);
  84
  85     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  86     surface_gl_destroy_texture(scon->gls, scon->surface);
  87
  88     scon->surface = new_surface;
  89
  90     if (!new_surface) {
  91         qemu_gl_fini_shader(scon->gls);
  92         scon->gls = NULL;
  93         sdl2_window_destroy(scon);
  94         return;
  95     }
  96
  97     if (!scon->real_window) {
  98         sdl2_window_create(scon);
  99         scon->gls = qemu_gl_init_shader();
 100     } else if (old_surface &&
 101                ((surface_width(old_surface)  != surface_width(new_surface)) ||
 102                 (surface_height(old_surface) != surface_height(new_surface)))) {
 103         sdl2_window_resize(scon);
 104     }
 105
 106     surface_gl_create_texture(scon->gls, scon->surface);
 107 }
 108
 109 void sdl2_gl_refresh(DisplayChangeListener *dcl)
 110 {
 111     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 112
 113     assert(scon->opengl);
 114
 115     graphic_hw_update(dcl->con);
 116     if (scon->updates && scon->surface) {
 117         scon->updates = 0;
 118         sdl2_gl_render_surface(scon);
 119     }
 120     sdl2_poll_events(scon);
 121 }
 122
 123 void sdl2_gl_redraw(struct sdl2_console *scon)
 124 {
 125     assert(scon->opengl);
 126
 127     if (scon->scanout_mode) {
 128         /* sdl2_gl_scanout_flush actually only care about
 129          * the first argument. */
 130         return sdl2_gl_scanout_flush(&scon->dcl, 0, 0, 0, 0);
 131     }
 132     if (scon->surface) {
 133         sdl2_gl_render_surface(scon);
 134     }
 135 }
 136
 137 QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl,
 138                                      QEMUGLParams *params)
 139 {
 140     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 141     SDL_GLContext ctx;
 142
 143     assert(scon->opengl);
 144
 145     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 146
 147     SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
 148     if (scon->opts->gl == DISPLAYGL_MODE_ON ||
 149         scon->opts->gl == DISPLAYGL_MODE_CORE) {
 150         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
 151                             SDL_GL_CONTEXT_PROFILE_CORE);
 152     } else if (scon->opts->gl == DISPLAYGL_MODE_ES) {
 153         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
 154                             SDL_GL_CONTEXT_PROFILE_ES);
 155     }
 156     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, params->major_ver);
 157     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, params->minor_ver);
 158
 159     ctx = SDL_GL_CreateContext(scon->real_window);
 160
 161     /* If SDL fail to create a GL context and we use the "on" flag,
 162      * then try to fallback to GLES.
 163      */
 164     if (!ctx && scon->opts->gl == DISPLAYGL_MODE_ON) {
 165         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
 166                             SDL_GL_CONTEXT_PROFILE_ES);
 167         ctx = SDL_GL_CreateContext(scon->real_window);
 168     }
 169     return (QEMUGLContext)ctx;
 170 }
 171
 172 void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
 173 {
 174     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 175
 176     SDL_GL_DeleteContext(sdlctx);
 177 }
 178
 179 int sdl2_gl_make_context_current(DisplayChangeListener *dcl,
 180                                  QEMUGLContext ctx)
 181 {
 182     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 183     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 184
 185     assert(scon->opengl);
 186
 187     return SDL_GL_MakeCurrent(scon->real_window, sdlctx);
 188 }
 189
 190 QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl)
 191 {
 192     SDL_GLContext sdlctx;
 193
 194     sdlctx = SDL_GL_GetCurrentContext();
 195     return (QEMUGLContext)sdlctx;
 196 }
 197
 198 void sdl2_gl_scanout_disable(DisplayChangeListener *dcl)
 199 {
 200     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 201
 202     assert(scon->opengl);
 203     scon->w = 0;
 204     scon->h = 0;
 205     sdl2_set_scanout_mode(scon, false);
 206 }
 207
 208 void sdl2_gl_scanout_texture(DisplayChangeListener *dcl,
 209                              uint32_t backing_id,
 210                              bool backing_y_0_top,
 211                              uint32_t backing_width,
 212                              uint32_t backing_height,
 213                              uint32_t x, uint32_t y,
 214                              uint32_t w, uint32_t h)
 215 {
 216     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 217
 218     assert(scon->opengl);
 219     scon->x = x;
 220     scon->y = y;
 221     scon->w = w;
 222     scon->h = h;
 223     scon->y0_top = backing_y_0_top;
 224
 225     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 226
 227     sdl2_set_scanout_mode(scon, true);
 228     egl_fb_setup_for_tex(&scon->guest_fb, backing_width, backing_height,
 229                          backing_id, false);
 230 }
 231
 232 void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
 233                            uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 234 {
 235     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 236     int ww, wh;
 237
 238     assert(scon->opengl);
 239     if (!scon->scanout_mode) {
 240         return;
 241     }
 242     if (!scon->guest_fb.framebuffer) {
 243         return;
 244     }
 245
 246     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 247
 248     SDL_GetWindowSize(scon->real_window, &ww, &wh);
 249     egl_fb_setup_default(&scon->win_fb, ww, wh);
 250     egl_fb_blit(&scon->win_fb, &scon->guest_fb, !scon->y0_top);
 251
 252     SDL_GL_SwapWindow(scon->real_window);
 253 }