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 "ui/console.h"
  28 #include "ui/input.h"
  29 #include "ui/sdl2.h"
  30
  31 void sdl2_2d_update(DisplayChangeListener *dcl,
  32                     int x, int y, int w, int h)
  33 {
  34     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  35     DisplaySurface *surf = scon->surface;
  36     SDL_Rect rect;
  37     size_t surface_data_offset;
  38     assert(!scon->opengl);
  39
  40     if (!scon->texture) {
  41         return;
  42     }
  43
  44     surface_data_offset = surface_bytes_per_pixel(surf) * x +
  45                           surface_stride(surf) * y;
  46     rect.x = x;
  47     rect.y = y;
  48     rect.w = w;
  49     rect.h = h;
  50
  51     SDL_UpdateTexture(scon->texture, &rect,
  52                       surface_data(surf) + surface_data_offset,
  53                       surface_stride(surf));
  54     SDL_RenderClear(scon->real_renderer);
  55     SDL_RenderCopy(scon->real_renderer, scon->texture, NULL, NULL);
  56     SDL_RenderPresent(scon->real_renderer);
  57 }
  58
  59 void sdl2_2d_switch(DisplayChangeListener *dcl,
  60                     DisplaySurface *new_surface)
  61 {
  62     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  63     DisplaySurface *old_surface = scon->surface;
  64     int format = 0;
  65
  66     assert(!scon->opengl);
  67
  68     scon->surface = new_surface;
  69
  70     if (scon->texture) {
  71         SDL_DestroyTexture(scon->texture);
  72         scon->texture = NULL;
  73     }
  74
  75     if (surface_is_placeholder(new_surface) && qemu_console_get_index(dcl->con)) {
  76         sdl2_window_destroy(scon);
  77         return;
  78     }
  79
  80     if (!scon->real_window) {
  81         sdl2_window_create(scon);
  82     } else if (old_surface &&
  83                ((surface_width(old_surface)  != surface_width(new_surface)) ||
  84                 (surface_height(old_surface) != surface_height(new_surface)))) {
  85         sdl2_window_resize(scon);
  86     }
  87
  88     SDL_RenderSetLogicalSize(scon->real_renderer,
  89                              surface_width(new_surface),
  90                              surface_height(new_surface));
  91
  92     switch (surface_format(scon->surface)) {
  93     case PIXMAN_x1r5g5b5:
  94         format = SDL_PIXELFORMAT_ARGB1555;
  95         break;
  96     case PIXMAN_r5g6b5:
  97         format = SDL_PIXELFORMAT_RGB565;
  98         break;
  99     case PIXMAN_a8r8g8b8:
 100     case PIXMAN_x8r8g8b8:
 101         format = SDL_PIXELFORMAT_ARGB8888;
 102         break;
 103     case PIXMAN_a8b8g8r8:
 104     case PIXMAN_x8b8g8r8:
 105         format = SDL_PIXELFORMAT_ABGR8888;
 106         break;
 107     case PIXMAN_r8g8b8a8:
 108     case PIXMAN_r8g8b8x8:
 109         format = SDL_PIXELFORMAT_RGBA8888;
 110         break;
 111     case PIXMAN_b8g8r8x8:
 112         format = SDL_PIXELFORMAT_BGRX8888;
 113         break;
 114     case PIXMAN_b8g8r8a8:
 115         format = SDL_PIXELFORMAT_BGRA8888;
 116         break;
 117     default:
 118         g_assert_not_reached();
 119     }
 120     scon->texture = SDL_CreateTexture(scon->real_renderer, format,
 121                                       SDL_TEXTUREACCESS_STREAMING,
 122                                       surface_width(new_surface),
 123                                       surface_height(new_surface));
 124     sdl2_2d_redraw(scon);
 125 }
 126
 127 void sdl2_2d_refresh(DisplayChangeListener *dcl)
 128 {
 129     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 130
 131     assert(!scon->opengl);
 132     graphic_hw_update(dcl->con);
 133     sdl2_poll_events(scon);
 134 }
 135
 136 void sdl2_2d_redraw(struct sdl2_console *scon)
 137 {
 138     assert(!scon->opengl);
 139
 140     if (!scon->surface) {
 141         return;
 142     }
 143     sdl2_2d_update(&scon->dcl, 0, 0,
 144                    surface_width(scon->surface),
 145                    surface_height(scon->surface));
 146 }
 147
 148 bool sdl2_2d_check_format(DisplayChangeListener *dcl,
 149                           pixman_format_code_t format)
 150 {
 151     /*
 152      * We let SDL convert for us a few more formats than,
 153      * the native ones. These are the ones I have tested.
 154      */
 155     return (format == PIXMAN_x8r8g8b8 ||
 156             format == PIXMAN_a8r8g8b8 ||
 157             format == PIXMAN_a8b8g8r8 ||
 158             format == PIXMAN_x8b8g8r8 ||
 159             format == PIXMAN_b8g8r8x8 ||
 160             format == PIXMAN_b8g8r8a8 ||
 161             format == PIXMAN_r8g8b8x8 ||
 162             format == PIXMAN_r8g8b8a8 ||
 163             format == PIXMAN_x1r5g5b5 ||
 164             format == PIXMAN_r5g6b5);
 165 }