LXR qemu/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
  33void 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
  73void 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
 129void 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
 138void 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
 150bool 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}
 162