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 #include <epoxy/gl.h>
  36
  37 static void sdl2_set_scanout_mode(struct sdl2_console *scon, bool scanout)
  38 {
  39     if (scon->scanout_mode == scanout) {
  40         return;
  41     }
  42
  43     scon->scanout_mode = scanout;
  44     if (!scon->scanout_mode) {
  45         egl_fb_destroy(&scon->guest_fb);
  46         if (scon->surface) {
  47             surface_gl_destroy_texture(scon->gls, scon->surface);
  48             surface_gl_create_texture(scon->gls, scon->surface);
  49         }
  50     }
  51 }
  52
  53 static void sdl2_gl_render_surface(struct sdl2_console *scon)
  54 {
  55     int ww, wh;
  56
  57     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  58     sdl2_set_scanout_mode(scon, false);
  59
  60     SDL_GetWindowSize(scon->real_window, &ww, &wh);
  61     surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);
  62
  63     surface_gl_render_texture(scon->gls, scon->surface);
  64     SDL_GL_SwapWindow(scon->real_window);
  65 }
  66
  67 void sdl2_gl_update(DisplayChangeListener *dcl,
  68                     int x, int y, int w, int h)
  69 {
  70     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  71
  72     assert(scon->opengl);
  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 (!new_surface) {
  93         console_gl_fini_context(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 = console_gl_init_context();
 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->surface) {
 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->surface) {
 130         sdl2_gl_render_surface(scon);
 131     }
 132 }
 133
 134 QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl,
 135                                      QEMUGLParams *params)
 136 {
 137     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 138     SDL_GLContext ctx;
 139
 140     assert(scon->opengl);
 141
 142     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 143
 144     SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
 145     SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
 146                         SDL_GL_CONTEXT_PROFILE_CORE);
 147     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, params->major_ver);
 148     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, params->minor_ver);
 149
 150     ctx = SDL_GL_CreateContext(scon->real_window);
 151     return (QEMUGLContext)ctx;
 152 }
 153
 154 void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
 155 {
 156     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 157
 158     SDL_GL_DeleteContext(sdlctx);
 159 }
 160
 161 int sdl2_gl_make_context_current(DisplayChangeListener *dcl,
 162                                  QEMUGLContext ctx)
 163 {
 164     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 165     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 166
 167     assert(scon->opengl);
 168
 169     return SDL_GL_MakeCurrent(scon->real_window, sdlctx);
 170 }
 171
 172 QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl)
 173 {
 174     SDL_GLContext sdlctx;
 175
 176     sdlctx = SDL_GL_GetCurrentContext();
 177     return (QEMUGLContext)sdlctx;
 178 }
 179
 180 void sdl2_gl_scanout_disable(DisplayChangeListener *dcl)
 181 {
 182     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 183
 184     assert(scon->opengl);
 185     scon->w = 0;
 186     scon->h = 0;
 187     sdl2_set_scanout_mode(scon, false);
 188 }
 189
 190 void sdl2_gl_scanout_texture(DisplayChangeListener *dcl,
 191                              uint32_t backing_id,
 192                              bool backing_y_0_top,
 193                              uint32_t backing_width,
 194                              uint32_t backing_height,
 195                              uint32_t x, uint32_t y,
 196                              uint32_t w, uint32_t h)
 197 {
 198     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 199
 200     assert(scon->opengl);
 201     scon->x = x;
 202     scon->y = y;
 203     scon->w = w;
 204     scon->h = h;
 205     scon->y0_top = backing_y_0_top;
 206
 207     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 208
 209     sdl2_set_scanout_mode(scon, true);
 210     egl_fb_create_for_tex(&scon->guest_fb, backing_width, backing_height,
 211                           backing_id);
 212 }
 213
 214 void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
 215                            uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 216 {
 217     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 218     int ww, wh;
 219
 220     assert(scon->opengl);
 221     if (!scon->scanout_mode) {
 222         return;
 223     }
 224     if (!scon->guest_fb.framebuffer) {
 225         return;
 226     }
 227
 228     SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 229
 230     SDL_GetWindowSize(scon->real_window, &ww, &wh);
 231     egl_fb_setup_default(&scon->win_fb, ww, wh);
 232     egl_fb_blit(&scon->win_fb, &scon->guest_fb, !scon->y0_top);
 233
 234     SDL_GL_SwapWindow(scon->real_window);
 235 }