LXR qemu/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#include "sysemu/sysemu.h"
  33
  34static void sdl2_set_scanout_mode(struct sdl2_console *scon, bool scanout)
  35{
  36    if (scon->scanout_mode == scanout) {
  37        return;
  38    }
  39
  40    scon->scanout_mode = scanout;
  41    if (!scon->scanout_mode) {
  42        egl_fb_destroy(&scon->guest_fb);
  43        if (scon->surface) {
  44            surface_gl_destroy_texture(scon->gls, scon->surface);
  45            surface_gl_create_texture(scon->gls, scon->surface);
  46        }
  47    }
  48}
  49
  50static void sdl2_gl_render_surface(struct sdl2_console *scon)
  51{
  52    int ww, wh;
  53
  54    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
  55    sdl2_set_scanout_mode(scon, false);
  56
  57    SDL_GetWindowSize(scon->real_window, &ww, &wh);
  58    surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);
  59
  60    surface_gl_render_texture(scon->gls, scon->surface);
  61    SDL_GL_SwapWindow(scon->real_window);
  62}
  63
  64void 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
  76void 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
 108void 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
 122void 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
 136QEMUGLContext 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
 171void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
 172{
 173    SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 174
 175    SDL_GL_DeleteContext(sdlctx);
 176}
 177
 178int 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
 189QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl)
 190{
 191    SDL_GLContext sdlctx;
 192
 193    sdlctx = SDL_GL_GetCurrentContext();
 194    return (QEMUGLContext)sdlctx;
 195}
 196
 197void sdl2_gl_scanout_disable(DisplayChangeListener *dcl)
 198{
 199    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 200
 201    assert(scon->opengl);
 202    scon->w = 0;
 203    scon->h = 0;
 204    sdl2_set_scanout_mode(scon, false);
 205}
 206
 207void sdl2_gl_scanout_texture(DisplayChangeListener *dcl,
 208                             uint32_t backing_id,
 209                             bool backing_y_0_top,
 210                             uint32_t backing_width,
 211                             uint32_t backing_height,
 212                             uint32_t x, uint32_t y,
 213                             uint32_t w, uint32_t h)
 214{
 215    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 216
 217    assert(scon->opengl);
 218    scon->x = x;
 219    scon->y = y;
 220    scon->w = w;
 221    scon->h = h;
 222    scon->y0_top = backing_y_0_top;
 223
 224    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 225
 226    sdl2_set_scanout_mode(scon, true);
 227    egl_fb_setup_for_tex(&scon->guest_fb, backing_width, backing_height,
 228                         backing_id, false);
 229}
 230
 231void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
 232                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 233{
 234    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 235    int ww, wh;
 236
 237    assert(scon->opengl);
 238    if (!scon->scanout_mode) {
 239        return;
 240    }
 241    if (!scon->guest_fb.framebuffer) {
 242        return;
 243    }
 244
 245    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
 246
 247    SDL_GetWindowSize(scon->real_window, &ww, &wh);
 248    egl_fb_setup_default(&scon->win_fb, ww, wh);
 249    egl_fb_blit(&scon->win_fb, &scon->guest_fb, !scon->y0_top);
 250
 251    SDL_GL_SwapWindow(scon->real_window);
 252}
 253