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 #include "qemu/osdep.h"
  27 #include "qemu-common.h"
  28 #include "ui/console.h"
  29 #include "ui/input.h"
  30 #include "ui/sdl2.h"
  31 #include "sysemu/sysemu.h"
  32
  33 void sdl2_2d_update(DisplayChangeListener *dcl,
  34                     int x, int y, int w, int h)
  35 {
  36     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  37     DisplaySurface *surf = qemu_console_surface(dcl->con);
  38     SDL_Rect rect;
  39
  40     assert(!scon->opengl);
  41
  42     if (!surf) {
  43         return;
  44     }
  45     if (!scon->texture) {
  46         return;
  47     }
  48
  49     /*
  50      * SDL2 seems to do some double-buffering, and trying to only
  51      * update the changed areas results in only one of the two buffers
  52      * being updated.  Which flickers alot.  So lets not try to be
  53      * clever do a full update every time ...
  54      */
  55 #if 0
  56     rect.x = x;
  57     rect.y = y;
  58     rect.w = w;
  59     rect.h = h;
  60 #else
  61     rect.x = 0;
  62     rect.y = 0;
  63     rect.w = surface_width(surf);
  64     rect.h = surface_height(surf);
  65 #endif
  66
  67     SDL_UpdateTexture(scon->texture, NULL, surface_data(surf),
  68                       surface_stride(surf));
  69     SDL_RenderCopy(scon->real_renderer, scon->texture, &rect, &rect);
  70     SDL_RenderPresent(scon->real_renderer);
  71 }
  72
  73 void sdl2_2d_switch(DisplayChangeListener *dcl,
  74                     DisplaySurface *new_surface)
  75 {
  76     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  77     DisplaySurface *old_surface = scon->surface;
  78     int format = 0;
  79
  80     assert(!scon->opengl);
  81
  82     scon->surface = new_surface;
  83
  84     if (scon->texture) {
  85         SDL_DestroyTexture(scon->texture);
  86         scon->texture = NULL;
  87     }
  88
  89     if (!new_surface) {
  90         sdl2_window_destroy(scon);
  91         return;
  92     }
  93
  94     if (!scon->real_window) {
  95         sdl2_window_create(scon);
  96     } else if (old_surface &&
  97                ((surface_width(old_surface)  != surface_width(new_surface)) ||
  98                 (surface_height(old_surface) != surface_height(new_surface)))) {
  99         sdl2_window_resize(scon);
 100     }
 101
 102     SDL_RenderSetLogicalSize(scon->real_renderer,
 103                              surface_width(new_surface),
 104                              surface_height(new_surface));
 105
 106     switch (surface_format(scon->surface)) {
 107     case PIXMAN_x1r5g5b5:
 108         format = SDL_PIXELFORMAT_ARGB1555;
 109         break;
 110     case PIXMAN_r5g6b5:
 111         format = SDL_PIXELFORMAT_RGB565;
 112         break;
 113     case PIXMAN_x8r8g8b8:
 114         format = SDL_PIXELFORMAT_ARGB8888;
 115         break;
 116     case PIXMAN_r8g8b8x8:
 117         format = SDL_PIXELFORMAT_RGBA8888;
 118         break;
 119     default:
 120         g_assert_not_reached();
 121     }
 122     scon->texture = SDL_CreateTexture(scon->real_renderer, format,
 123                                       SDL_TEXTUREACCESS_STREAMING,
 124                                       surface_width(new_surface),
 125                                       surface_height(new_surface));
 126     sdl2_2d_redraw(scon);
 127 }
 128
 129 void sdl2_2d_refresh(DisplayChangeListener *dcl)
 130 {
 131     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 132
 133     assert(!scon->opengl);
 134     graphic_hw_update(dcl->con);
 135     sdl2_poll_events(scon);
 136 }
 137
 138 void sdl2_2d_redraw(struct sdl2_console *scon)
 139 {
 140     assert(!scon->opengl);
 141
 142     if (!scon->surface) {
 143         return;
 144     }
 145     sdl2_2d_update(&scon->dcl, 0, 0,
 146                    surface_width(scon->surface),
 147                    surface_height(scon->surface));
 148 }
 149
 150 bool sdl2_2d_check_format(DisplayChangeListener *dcl,
 151                           pixman_format_code_t format)
 152 {
 153     /*
 154      * We let SDL convert for us a few more formats than,
 155      * the native ones. Thes are the ones I have tested.
 156      */
 157     return (format == PIXMAN_x8r8g8b8 ||
 158             format == PIXMAN_b8g8r8x8 ||
 159             format == PIXMAN_x1r5g5b5 ||
 160             format == PIXMAN_r5g6b5);
 161 }