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