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