SDL support for VGA, keyboard and mouse

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@348 c046a42c-6fe2-441c-8c8c-71466251a162

sdl.c

+/*
+ * QEMU SDL display driver
+ * 
+ * Copyright (c) 2003 Fabrice Bellard
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <getopt.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/time.h>
+#include <malloc.h>
+#include <termios.h>
+#include <sys/poll.h>
+#include <errno.h>
+#include <sys/wait.h>
+#include <netinet/in.h>
+
+#include <SDL.h>
+
+#include "cpu-i386.h"
+#include "exec.h"
+
+#include "vl.h"
+
+static SDL_Surface *screen;
+static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
+
+static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
+{
+    SDL_UpdateRect(screen, x, y, w, h);
+}
+
+static void sdl_resize(DisplayState *ds, int w, int h)
+{
+    int flags;
+
+    //    printf("resizing to %d %d\n", w, h);
+
+    flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
+    flags |= SDL_RESIZABLE;
+    screen = SDL_SetVideoMode(w, h, 0, flags);
+    if (!screen) {
+        fprintf(stderr, "Could not open SDL display\n");
+        exit(1);
+    }
+    ds->data = screen->pixels;
+    ds->linesize = screen->pitch;
+    ds->depth = screen->format->BitsPerPixel;
+}
+
+static const uint32_t x_keycode_to_pc_keycode[61] = {
+   0x47e0,      /*  97  Home   */
+   0x48e0,      /*  98  Up     */
+   0x49e0,      /*  99  PgUp   */
+   0x4be0,      /* 100  Left   */
+   0x4c,        /* 101  KP-5   */
+   0x4de0,      /* 102  Right  */
+   0x4fe0,      /* 103  End    */
+   0x50e0,      /* 104  Down   */
+   0x51e0,      /* 105  PgDn   */
+   0x52e0,      /* 106  Ins    */
+   0x53e0,      /* 107  Del    */
+   0x1ce0,      /* 108  Enter  */
+   0x1de0,      /* 109  Ctrl-R */
+   0x451de1,    /* 110  Pause  */
+   0x37e0,      /* 111  Print  */
+   0x35e0,      /* 112  Divide */
+   0x38e0,      /* 113  Alt-R  */
+   0x46e0,      /* 114  Break  */   
+   0x0,         /* 115 */
+   0x0,         /* 116 */
+   0x0,         /* 117 */
+   0x0,         /* 118 */
+   0x0,         /* 119 */
+   0x0,         /* 120 */
+   0x0,         /* 121 */
+   0x0,         /* 122 */
+   0x0,         /* 123 */
+   0x0,         /* 124 */
+   0x0,         /* 125 */
+   0x0,         /* 126 */
+   0x0,         /* 127 */
+   0x0,         /* 128 */
+   0x0,         /* 129 */
+   0x0,         /* 130 */
+   0x0,         /* 131 */
+   0x0,         /* 132 */
+   0x0,         /* 133 */
+   0x0,         /* 134 */
+   0x0,         /* 135 */
+   0x47,         /* 136 KP_7 */
+   0x48,         /* 137 KP_8 */
+   0x49,         /* 138 KP_9 */
+   0x4b,         /* 139 KP_4 */
+   0x4c,         /* 140 KP_5 */
+   0x4d,         /* 141 KP_6 */
+   0x4f,         /* 142 KP_1 */
+   0x50,         /* 143 KP_2 */
+   0x51,         /* 144 KP_3 */
+   0x52,         /* 145 KP_0 */
+   0x53,         /* 146 KP_. */
+   0x47,         /* 147 KP_HOME */
+   0x48,         /* 148 KP_UP */
+   0x49,         /* 149 KP_PgUp */
+   0x4b,         /* 150 KP_Left */
+   0x4c,         /* 151 KP_ */
+   0x4d,         /* 152 KP_Right */
+   0x4f,         /* 153 KP_End */
+   0x50,         /* 154 KP_Down */
+   0x51,         /* 155 KP_PgDn */
+   0x52,         /* 156 KP_Ins */
+   0x53,         /* 157 KP_Del */
+};
+
+static void sdl_process_key(SDL_KeyboardEvent *ev)
+{
+    int keycode, v;
+    
+    /* XXX: not portable, but avoids complicated mappings */
+    keycode = ev->keysym.scancode;
+    if (keycode < 9) {
+        keycode = 0;
+    } else if (keycode < 97) {
+        keycode -= 8; /* just an offset */
+    } else if (keycode < 158) {
+        /* use conversion table */
+        keycode = x_keycode_to_pc_keycode[keycode - 97];
+    } else {
+        keycode = 0;
+    }
+    
+    /* now send the key code */
+    while (keycode != 0) {
+        v = keycode & 0xff;
+        if (ev->type == SDL_KEYUP)
+            v |= 0x80;
+        kbd_put_keycode(v);
+        keycode >>= 8;
+    }
+}
+
+static void sdl_grab_start(void)
+{
+    SDL_WM_SetCaption("QEMU - Press Ctrl-Shift to exit grab", "QEMU");
+    SDL_ShowCursor(0);
+    SDL_WM_GrabInput(SDL_GRAB_ON);
+    /* dummy read to avoid moving the mouse */
+    SDL_GetRelativeMouseState(NULL, NULL);
+    gui_grab = 1;
+}
+
+static void sdl_grab_end(void)
+{
+    SDL_WM_SetCaption("QEMU", "QEMU");
+    SDL_WM_GrabInput(SDL_GRAB_OFF);
+    SDL_ShowCursor(1);
+    gui_grab = 0;
+}
+
+static void sdl_send_mouse_event(void)
+{
+    int dx, dy, dz, state, buttons;
+    state = SDL_GetRelativeMouseState(&dx, &dy);
+    buttons = 0;
+    if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
+        buttons |= MOUSE_EVENT_LBUTTON;
+    if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
+        buttons |= MOUSE_EVENT_RBUTTON;
+    if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
+        buttons |= MOUSE_EVENT_MBUTTON;
+    /* XXX: test wheel */
+    dz = 0;
+    if (state & SDL_BUTTON(SDL_BUTTON_WHEELUP))
+        dz--;
+    if (state & SDL_BUTTON(SDL_BUTTON_WHEELDOWN))
+        dz++;
+    kbd_mouse_event(dx, dy, dz, buttons);
+}
+
+static void sdl_refresh(DisplayState *ds)
+{
+    SDL_Event ev1, *ev = &ev1;
+
+    vga_update_display();
+    while (SDL_PollEvent(ev)) {
+        switch (ev->type) {
+        case SDL_VIDEOEXPOSE:
+            sdl_update(ds, 0, 0, screen->w, screen->h);
+            break;
+        case SDL_KEYDOWN:
+        case SDL_KEYUP:
+            if (ev->type == SDL_KEYDOWN) {
+                if ((SDL_GetModState() & (KMOD_LSHIFT | KMOD_LCTRL)) ==
+                    (KMOD_LSHIFT | KMOD_LCTRL)) {
+                    /* exit/enter grab if pressing Ctrl-Shift */
+                    if (!gui_grab)
+                        sdl_grab_start();
+                    else
+                        sdl_grab_end();
+                }
+            }
+            sdl_process_key(&ev->key);
+            break;
+        case SDL_QUIT:
+            reset_requested = 1;
+            break;
+        case SDL_MOUSEMOTION:
+            if (gui_grab) {
+                sdl_send_mouse_event();
+            }
+            break;
+        case SDL_MOUSEBUTTONDOWN:
+        case SDL_MOUSEBUTTONUP:
+            {
+                SDL_MouseButtonEvent *bev = &ev->button;
+                if (!gui_grab) {
+                    if (ev->type == SDL_MOUSEBUTTONDOWN &&
+                        (bev->state & SDL_BUTTON_LMASK)) {
+                        /* start grabbing all events */
+                        sdl_grab_start();
+                    }
+                } else {
+                    sdl_send_mouse_event();
+                }
+            }
+            break;
+        default:
+            break;
+        }
+    }
+}
+
+void sdl_display_init(DisplayState *ds)
+{
+    int flags;
+
+    flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
+    if (SDL_Init (flags)) {
+        fprintf(stderr, "Could not initialize SDL - exiting\n");
+        exit(1);
+    }
+    ds->dpy_update = sdl_update;
+    ds->dpy_resize = sdl_resize;
+    ds->dpy_refresh = sdl_refresh;
+
+    sdl_resize(ds, 640, 400);
+    SDL_WM_SetCaption("QEMU", "QEMU");
+    SDL_EnableKeyRepeat(250, 50);
+    gui_grab = 0;
+}