ui/sdl2-2d.c

   1 /*
   2  * QEMU SDL display driver
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */
  25
  26 /* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
  27 #undef WIN32_LEAN_AND_MEAN
  28
  29 #include <SDL.h>
  30 #include <SDL_syswm.h>
  31
  32 #include "qemu-common.h"
  33 #include "ui/console.h"
  34 #include "ui/input.h"
  35 #include "ui/sdl2.h"
  36 #include "sysemu/sysemu.h"
  37
  38 void sdl2_2d_update(DisplayChangeListener *dcl,
  39                     int x, int y, int w, int h)
  40 {
  41     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  42     DisplaySurface *surf = qemu_console_surface(dcl->con);
  43     SDL_Rect rect;
  44
  45     if (!surf) {
  46         return;
  47     }
  48     if (!scon->texture) {
  49         return;
  50     }
  51
  52     rect.x = x;
  53     rect.y = y;
  54     rect.w = w;
  55     rect.h = h;
  56
  57     SDL_UpdateTexture(scon->texture, NULL, surface_data(surf),
  58                       surface_stride(surf));
  59     SDL_RenderCopy(scon->real_renderer, scon->texture, &rect, &rect);
  60     SDL_RenderPresent(scon->real_renderer);
  61 }
  62
  63 void sdl2_2d_switch(DisplayChangeListener *dcl,
  64                     DisplaySurface *new_surface)
  65 {
  66     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  67     DisplaySurface *old_surface = scon->surface;
  68     int format = 0;
  69
  70     scon->surface = new_surface;
  71
  72     if (scon->texture) {
  73         SDL_DestroyTexture(scon->texture);
  74         scon->texture = NULL;
  75     }
  76
  77     if (!new_surface) {
  78         sdl2_window_destroy(scon);
  79         return;
  80     }
  81
  82     if (!scon->real_window) {
  83         sdl2_window_create(scon);
  84     } else if (old_surface &&
  85                ((surface_width(old_surface)  != surface_width(new_surface)) ||
  86                 (surface_height(old_surface) != surface_height(new_surface)))) {
  87         sdl2_window_resize(scon);
  88     }
  89
  90     SDL_RenderSetLogicalSize(scon->real_renderer,
  91                              surface_width(new_surface),
  92                              surface_height(new_surface));
  93
  94     if (surface_bits_per_pixel(scon->surface) == 16) {
  95         format = SDL_PIXELFORMAT_RGB565;
  96     } else if (surface_bits_per_pixel(scon->surface) == 32) {
  97         format = SDL_PIXELFORMAT_ARGB8888;
  98     }
  99     scon->texture = SDL_CreateTexture(scon->real_renderer, format,
 100                                       SDL_TEXTUREACCESS_STREAMING,
 101                                       surface_width(new_surface),
 102                                       surface_height(new_surface));
 103     sdl2_2d_redraw(scon);
 104 }
 105
 106 void sdl2_2d_refresh(DisplayChangeListener *dcl)
 107 {
 108     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 109
 110     graphic_hw_update(dcl->con);
 111     sdl2_poll_events(scon);
 112 }
 113
 114 void sdl2_2d_redraw(struct sdl2_console *scon)
 115 {
 116     if (!scon->surface) {
 117         return;
 118     }
 119     sdl2_2d_update(&scon->dcl, 0, 0,
 120                    surface_width(scon->surface),
 121                    surface_height(scon->surface));
 122 }