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 = qemu_console_surface(dcl->con);
  36     SDL_Rect rect;
  37     size_t surface_data_offset;
  38     assert(!scon->opengl);
  39
  40     if (!surf) {
  41         return;
  42     }
  43     if (!scon->texture) {
  44         return;
  45     }
  46
  47     surface_data_offset = surface_bytes_per_pixel(surf) * x +
  48                           surface_stride(surf) * y;
  49     rect.x = x;
  50     rect.y = y;
  51     rect.w = w;
  52     rect.h = h;
  53
  54     SDL_UpdateTexture(scon->texture, &rect,
  55                       surface_data(surf) + surface_data_offset,
  56                       surface_stride(surf));
  57     SDL_RenderClear(scon->real_renderer);
  58     SDL_RenderCopy(scon->real_renderer, scon->texture, NULL, NULL);
  59     SDL_RenderPresent(scon->real_renderer);
  60 }
  61
  62 void sdl2_2d_switch(DisplayChangeListener *dcl,
  63                     DisplaySurface *new_surface)
  64 {
  65     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  66     DisplaySurface *old_surface = scon->surface;
  67     int format = 0;
  68
  69     assert(!scon->opengl);
  70
  71     scon->surface = new_surface;
  72
  73     if (scon->texture) {
  74         SDL_DestroyTexture(scon->texture);
  75         scon->texture = NULL;
  76     }
  77
  78     if (!new_surface) {
  79         sdl2_window_destroy(scon);
  80         return;
  81     }
  82
  83     if (!scon->real_window) {
  84         sdl2_window_create(scon);
  85     } else if (old_surface &&
  86                ((surface_width(old_surface)  != surface_width(new_surface)) ||
  87                 (surface_height(old_surface) != surface_height(new_surface)))) {
  88         sdl2_window_resize(scon);
  89     }
  90
  91     SDL_RenderSetLogicalSize(scon->real_renderer,
  92                              surface_width(new_surface),
  93                              surface_height(new_surface));
  94
  95     switch (surface_format(scon->surface)) {
  96     case PIXMAN_x1r5g5b5:
  97         format = SDL_PIXELFORMAT_ARGB1555;
  98         break;
  99     case PIXMAN_r5g6b5:
 100         format = SDL_PIXELFORMAT_RGB565;
 101         break;
 102     case PIXMAN_a8r8g8b8:
 103     case PIXMAN_x8r8g8b8:
 104         format = SDL_PIXELFORMAT_ARGB8888;
 105         break;
 106     case PIXMAN_a8b8g8r8:
 107     case PIXMAN_x8b8g8r8:
 108         format = SDL_PIXELFORMAT_ABGR8888;
 109         break;
 110     case PIXMAN_r8g8b8a8:
 111     case PIXMAN_r8g8b8x8:
 112         format = SDL_PIXELFORMAT_RGBA8888;
 113         break;
 114     case PIXMAN_b8g8r8x8:
 115         format = SDL_PIXELFORMAT_BGRX8888;
 116         break;
 117     case PIXMAN_b8g8r8a8:
 118         format = SDL_PIXELFORMAT_BGRA8888;
 119         break;
 120     default:
 121         g_assert_not_reached();
 122     }
 123     scon->texture = SDL_CreateTexture(scon->real_renderer, format,
 124                                       SDL_TEXTUREACCESS_STREAMING,
 125                                       surface_width(new_surface),
 126                                       surface_height(new_surface));
 127     sdl2_2d_redraw(scon);
 128 }
 129
 130 void sdl2_2d_refresh(DisplayChangeListener *dcl)
 131 {
 132     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 133
 134     assert(!scon->opengl);
 135     graphic_hw_update(dcl->con);
 136     sdl2_poll_events(scon);
 137 }
 138
 139 void sdl2_2d_redraw(struct sdl2_console *scon)
 140 {
 141     assert(!scon->opengl);
 142
 143     if (!scon->surface) {
 144         return;
 145     }
 146     sdl2_2d_update(&scon->dcl, 0, 0,
 147                    surface_width(scon->surface),
 148                    surface_height(scon->surface));
 149 }
 150
 151 bool sdl2_2d_check_format(DisplayChangeListener *dcl,
 152                           pixman_format_code_t format)
 153 {
 154     /*
 155      * We let SDL convert for us a few more formats than,
 156      * the native ones. Thes are the ones I have tested.
 157      */
 158     return (format == PIXMAN_x8r8g8b8 ||
 159             format == PIXMAN_a8r8g8b8 ||
 160             format == PIXMAN_a8b8g8r8 ||
 161             format == PIXMAN_x8b8g8r8 ||
 162             format == PIXMAN_b8g8r8x8 ||
 163             format == PIXMAN_b8g8r8a8 ||
 164             format == PIXMAN_r8g8b8x8 ||
 165             format == PIXMAN_r8g8b8a8 ||
 166             format == PIXMAN_x1r5g5b5 ||
 167             format == PIXMAN_r5g6b5);
 168 }