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
  33static 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
  49static 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
  63void 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
  75void 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
 107void 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
 121void 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
 135QEMUGLContext 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
 170void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
 171{
 172    SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 173
 174    SDL_GL_DeleteContext(sdlctx);
 175}
 176
 177int 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
 188QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl)
 189{
 190    SDL_GLContext sdlctx;
 191
 192    sdlctx = SDL_GL_GetCurrentContext();
 193    return (QEMUGLContext)sdlctx;
 194}
 195
 196void 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
 206void 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
 230void 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}
 252