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