Add working webpage for unix v4

1 files changed, 275 insertions, 0 deletions

diff --git a/jslinux-2019-12-21/tinyemu-2019-12-21/sdl.c b/jslinux-2019-12-21/tinyemu-2019-12-21/sdl.c
new file mode 100644
index 0000000..c2afeba
--- /dev/null
+++ b/jslinux-2019-12-21/tinyemu-2019-12-21/sdl.c
@@ -0,0 +1,275 @@
+/*
+ * SDL display driver
+ * 
+ * Copyright (c) 2017 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 <inttypes.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <SDL/SDL.h>
+
+#include "cutils.h"
+#include "virtio.h"
+#include "machine.h"
+
+#define KEYCODE_MAX 127
+
+static SDL_Surface *screen;
+static SDL_Surface *fb_surface;
+static int screen_width, screen_height, fb_width, fb_height, fb_stride;
+static SDL_Cursor *sdl_cursor_hidden;
+static uint8_t key_pressed[KEYCODE_MAX + 1];
+
+static void sdl_update_fb_surface(FBDevice *fb_dev)
+{
+    if (!fb_surface)
+        goto force_alloc;
+    if (fb_width != fb_dev->width ||
+        fb_height != fb_dev->height ||
+        fb_stride != fb_dev->stride) {
+    force_alloc:
+        if (fb_surface != NULL)
+            SDL_FreeSurface(fb_surface);
+        fb_width = fb_dev->width;
+        fb_height = fb_dev->height;
+        fb_stride = fb_dev->stride;
+        fb_surface = SDL_CreateRGBSurfaceFrom(fb_dev->fb_data,
+                                              fb_dev->width, fb_dev->height,
+                                              32, fb_dev->stride,
+                                              0x00ff0000,
+                                              0x0000ff00,
+                                              0x000000ff,
+                                              0x00000000);
+        if (!fb_surface) {
+            fprintf(stderr, "Could not create SDL framebuffer surface\n");
+            exit(1);
+        }
+    }
+}
+
+static void sdl_update(FBDevice *fb_dev, void *opaque,
+                       int x, int y, int w, int h)
+{
+    SDL_Rect r;
+    //    printf("sdl_update: %d %d %d %d\n", x, y, w, h);
+    r.x = x;
+    r.y = y;
+    r.w = w;
+    r.h = h;
+    SDL_BlitSurface(fb_surface, &r, screen, &r);
+    SDL_UpdateRect(screen, r.x, r.y, r.w, r.h);
+}
+
+#if defined(_WIN32)
+
+static int sdl_get_keycode(const SDL_KeyboardEvent *ev)
+{
+    return ev->keysym.scancode;
+}
+
+#else
+
+/* we assume Xorg is used with a PC keyboard. Return 0 if no keycode found. */
+static int sdl_get_keycode(const SDL_KeyboardEvent *ev)
+{
+    int keycode;
+    keycode = ev->keysym.scancode;
+    if (keycode < 9) {
+        keycode = 0;
+    } else if (keycode < 127 + 8) {
+        keycode -= 8;
+    } else {
+        keycode = 0;
+    }
+    return keycode;
+}
+
+#endif
+
+/* release all pressed keys */
+static void sdl_reset_keys(VirtMachine *m)
+{
+    int i;
+    
+    for(i = 1; i <= KEYCODE_MAX; i++) {
+        if (key_pressed[i]) {
+            vm_send_key_event(m, FALSE, i);
+            key_pressed[i] = FALSE;
+        }
+    }
+}
+
+static void sdl_handle_key_event(const SDL_KeyboardEvent *ev, VirtMachine *m)
+{
+    int keycode, keypress;
+
+    keycode = sdl_get_keycode(ev);
+    if (keycode) {
+        if (keycode == 0x3a || keycode ==0x45) {
+            /* SDL does not generate key up for numlock & caps lock */
+            vm_send_key_event(m, TRUE, keycode);
+            vm_send_key_event(m, FALSE, keycode);
+        } else {
+            keypress = (ev->type == SDL_KEYDOWN);
+            if (keycode <= KEYCODE_MAX)
+                key_pressed[keycode] = keypress;
+            vm_send_key_event(m, keypress, keycode);
+        }
+    } else if (ev->type == SDL_KEYUP) {
+        /* workaround to reset the keyboard state (used when changing
+           desktop with ctrl-alt-x on Linux) */
+        sdl_reset_keys(m);
+    }
+}
+
+static void sdl_send_mouse_event(VirtMachine *m, int x1, int y1,
+                                 int dz, int state, BOOL is_absolute)
+{
+    int buttons, x, y;
+
+    buttons = 0;
+    if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
+        buttons |= (1 << 0);
+    if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
+        buttons |= (1 << 1);
+    if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
+        buttons |= (1 << 2);
+    if (is_absolute) {
+        x = (x1 * 32768) / screen_width;
+        y = (y1 * 32768) / screen_height;
+    } else {
+        x = x1;
+        y = y1;
+    }
+    vm_send_mouse_event(m, x, y, dz, buttons);
+}
+
+static void sdl_handle_mouse_motion_event(const SDL_Event *ev, VirtMachine *m)
+{
+    BOOL is_absolute = vm_mouse_is_absolute(m);
+    int x, y;
+    if (is_absolute) {
+        x = ev->motion.x;
+        y = ev->motion.y;
+    } else {
+        x = ev->motion.xrel;
+        y = ev->motion.yrel;
+    }
+    sdl_send_mouse_event(m, x, y, 0, ev->motion.state, is_absolute);
+}
+
+static void sdl_handle_mouse_button_event(const SDL_Event *ev, VirtMachine *m)
+{
+    BOOL is_absolute = vm_mouse_is_absolute(m);
+    int state, dz;
+
+    dz = 0;
+    if (ev->type == SDL_MOUSEBUTTONDOWN) {
+        if (ev->button.button == SDL_BUTTON_WHEELUP) {
+            dz = 1;
+        } else if (ev->button.button == SDL_BUTTON_WHEELDOWN) {
+            dz = -1;
+        }
+    }
+    
+    state = SDL_GetMouseState(NULL, NULL);
+    /* just in case */
+    if (ev->type == SDL_MOUSEBUTTONDOWN)
+        state |= SDL_BUTTON(ev->button.button);
+    else
+        state &= ~SDL_BUTTON(ev->button.button);
+
+    if (is_absolute) {
+        sdl_send_mouse_event(m, ev->button.x, ev->button.y,
+                             dz, state, is_absolute);
+    } else {
+        sdl_send_mouse_event(m, 0, 0, dz, state, is_absolute);
+    }
+}
+
+void sdl_refresh(VirtMachine *m)
+{
+    SDL_Event ev_s, *ev = &ev_s;
+
+    if (!m->fb_dev)
+        return;
+    
+    sdl_update_fb_surface(m->fb_dev);
+
+    m->fb_dev->refresh(m->fb_dev, sdl_update, NULL);
+    
+    while (SDL_PollEvent(ev)) {
+        switch (ev->type) {
+        case SDL_KEYDOWN:
+        case SDL_KEYUP:
+            sdl_handle_key_event(&ev->key, m);
+            break;
+        case SDL_MOUSEMOTION:
+            sdl_handle_mouse_motion_event(ev, m);
+            break;
+        case SDL_MOUSEBUTTONDOWN:
+        case SDL_MOUSEBUTTONUP:
+            sdl_handle_mouse_button_event(ev, m);
+            break;
+        case SDL_QUIT:
+            exit(0);
+        }
+    }
+}
+
+static void sdl_hide_cursor(void)
+{
+    uint8_t data = 0;
+    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
+    SDL_ShowCursor(1);
+    SDL_SetCursor(sdl_cursor_hidden);
+}
+
+void sdl_init(int width, int height)
+{
+    int flags;
+    
+    screen_width = width;
+    screen_height = height;
+
+    if (SDL_Init (SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE)) {
+        fprintf(stderr, "Could not initialize SDL - exiting\n");
+        exit(1);
+    }
+
+    flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
+    screen = SDL_SetVideoMode(width, height, 0, flags);
+    if (!screen || !screen->pixels) {
+        fprintf(stderr, "Could not open SDL display\n");
+        exit(1);
+    }
+
+    SDL_WM_SetCaption("TinyEMU", "TinyEMU");
+
+    sdl_hide_cursor();
+}
+