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