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     if (!scon->real_window) {
  71         return;
  72     }
  73
  74     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  75     surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h);
  76     scon->updates++;
  77 }
  78
  79 void sdl2_gl_switch(DisplayChangeListener *dcl,
  80                     DisplaySurface *new_surface)
  81 {
  82     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  83     DisplaySurface *old_surface = scon->surface;
  84
  85     assert(scon->opengl);
  86
  87     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  88     surface_gl_destroy_texture(scon->gls, scon->surface);
  89
  90     scon->surface = new_surface;
  91
  92     if (surface_is_placeholder(new_surface) && qemu_console_get_index(dcl->con)) {
  93         qemu_gl_fini_shader(scon->gls);
  94         scon->gls = NULL;
  95         sdl2_window_destroy(scon);
  96         return;
  97     }
  98
  99     if (!scon->real_window) {
 100         sdl2_window_create(scon);
 101         scon->gls = qemu_gl_init_shader();
 102     } else if (old_surface &&
 103                ((surface_width(old_surface)  != surface_width(new_surface)) ||
 104                 (surface_height(old_surface) != surface_height(new_surface)))) {
 105         sdl2_window_resize(scon);
 106     }
 107
 108     surface_gl_create_texture(scon->gls, scon->surface);
 109 }
 110
 111 void sdl2_gl_refresh(DisplayChangeListener *dcl)
 112 {
 113     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 114
 115     assert(scon->opengl);
 116
 117     graphic_hw_update(dcl->con);
 118     if (scon->updates && scon->real_window) {
 119         scon->updates = 0;
 120         sdl2_gl_render_surface(scon);
 121     }
 122     sdl2_poll_events(scon);
 123 }
 124
 125 void sdl2_gl_redraw(struct sdl2_console *scon)
 126 {
 127     assert(scon->opengl);
 128
 129     if (scon->scanout_mode) {
 130         /* sdl2_gl_scanout_flush actually only care about
 131          * the first argument. */
 132         return sdl2_gl_scanout_flush(&scon->dcl, 0, 0, 0, 0);
 133     }
 134     if (scon->surface) {
 135         sdl2_gl_render_surface(scon);
 136     }
 137 }
 138
 139 QEMUGLContext sdl2_gl_create_context(DisplayGLCtx *dgc,
 140                                      QEMUGLParams *params)
 141 {
 142     struct sdl2_console *scon = container_of(dgc, struct sdl2_console, dgc);
 143     SDL_GLContext ctx;
 144
 145     assert(scon->opengl);
 146
 147     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 148
 149     SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
 150     if (scon->opts->gl == DISPLAYGL_MODE_ON ||
 151         scon->opts->gl == DISPLAYGL_MODE_CORE) {
 152         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
 153                             SDL_GL_CONTEXT_PROFILE_CORE);
 154     } else if (scon->opts->gl == DISPLAYGL_MODE_ES) {
 155         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
 156                             SDL_GL_CONTEXT_PROFILE_ES);
 157     }
 158     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, params->major_ver);
 159     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, params->minor_ver);
 160
 161     ctx = SDL_GL_CreateContext(scon->real_window);
 162
 163     /* If SDL fail to create a GL context and we use the "on" flag,
 164      * then try to fallback to GLES.
 165      */
 166     if (!ctx && scon->opts->gl == DISPLAYGL_MODE_ON) {
 167         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
 168                             SDL_GL_CONTEXT_PROFILE_ES);
 169         ctx = SDL_GL_CreateContext(scon->real_window);
 170     }
 171     return (QEMUGLContext)ctx;
 172 }
 173
 174 void sdl2_gl_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
 175 {
 176     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 177
 178     SDL_GL_DeleteContext(sdlctx);
 179 }
 180
 181 int sdl2_gl_make_context_current(DisplayGLCtx *dgc,
 182                                  QEMUGLContext ctx)
 183 {
 184     struct sdl2_console *scon = container_of(dgc, struct sdl2_console, dgc);
 185     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 186
 187     assert(scon->opengl);
 188
 189     return SDL_GL_MakeCurrent(scon->real_window, sdlctx);
 190 }
 191
 192 void sdl2_gl_scanout_disable(DisplayChangeListener *dcl)
 193 {
 194     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 195
 196     assert(scon->opengl);
 197     scon->w = 0;
 198     scon->h = 0;
 199     sdl2_set_scanout_mode(scon, false);
 200 }
 201
 202 void sdl2_gl_scanout_texture(DisplayChangeListener *dcl,
 203                              uint32_t backing_id,
 204                              bool backing_y_0_top,
 205                              uint32_t backing_width,
 206                              uint32_t backing_height,
 207                              uint32_t x, uint32_t y,
 208                              uint32_t w, uint32_t h,
 209                              void *d3d_tex2d)
 210 {
 211     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 212
 213     assert(scon->opengl);
 214     scon->x = x;
 215     scon->y = y;
 216     scon->w = w;
 217     scon->h = h;
 218     scon->y0_top = backing_y_0_top;
 219
 220     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 221
 222     sdl2_set_scanout_mode(scon, true);
 223     egl_fb_setup_for_tex(&scon->guest_fb, backing_width, backing_height,
 224                          backing_id, false);
 225 }
 226
 227 void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
 228                            uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 229 {
 230     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 231     int ww, wh;
 232
 233     assert(scon->opengl);
 234     if (!scon->scanout_mode) {
 235         return;
 236     }
 237     if (!scon->guest_fb.framebuffer) {
 238         return;
 239     }
 240
 241     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 242
 243     SDL_GetWindowSize(scon->real_window, &ww, &wh);
 244     egl_fb_setup_default(&scon->win_fb, ww, wh);
 245     egl_fb_blit(&scon->win_fb, &scon->guest_fb, !scon->y0_top);
 246
 247     SDL_GL_SwapWindow(scon->real_window);
 248 }