+ checked_free(video.fullscreen_modes);
+
+ video.fullscreen_modes = NULL;
+ video.fullscreen_mode_current = NULL;
+
+ video.window_scaling_percent = setup.window_scaling_percent;
+ video.window_scaling_quality = setup.window_scaling_quality;
+
+#if defined(TARGET_SDL2)
+ int num_displays = SDL_GetNumVideoDisplays();
+
+ if (num_displays > 0)
+ {
+ // currently only display modes of first display supported
+ int num_modes = SDL_GetNumDisplayModes(0);
+
+ if (num_modes > 0)
+ {
+ modes = checked_calloc((num_modes + 1) * sizeof(SDL_Rect *));
+
+ for (i = 0; i < num_modes; i++)
+ {
+ SDL_DisplayMode mode;
+
+ if (SDL_GetDisplayMode(0, i, &mode) < 0)
+ break;
+
+ modes[i] = checked_calloc(sizeof(SDL_Rect));
+
+ modes[i]->w = mode.w;
+ modes[i]->h = mode.h;
+ }
+ }
+ }
+#else
+ /* get available hardware supported fullscreen modes */
+ modes = SDL_ListModes(NULL, SDL_FULLSCREEN | SDL_HWSURFACE);
+#endif
+
+ if (modes == NULL)
+ {
+ /* no hardware screen modes available => no fullscreen mode support */
+ // video.fullscreen_available = FALSE;
+ hardware_fullscreen_available = FALSE;
+ }
+ else if (modes == (SDL_Rect **)-1)
+ {
+ /* fullscreen resolution is not restricted -- all resolutions available */
+ video.fullscreen_modes = checked_calloc(2 * sizeof(struct ScreenModeInfo));
+
+ /* use native video buffer size for fullscreen mode */
+ video.fullscreen_modes[0].width = video.width;
+ video.fullscreen_modes[0].height = video.height;
+
+ video.fullscreen_modes[1].width = -1;
+ video.fullscreen_modes[1].height = -1;
+ }
+ else
+ {
+ /* in this case, a certain number of screen modes is available */
+ int num_modes = 0;
+
+ for (i = 0; modes[i] != NULL; i++)
+ {
+ boolean found_mode = FALSE;
+
+ /* screen mode is smaller than video buffer size -- skip it */
+ if (modes[i]->w < video.width || modes[i]->h < video.height)
+ continue;
+
+ if (video.fullscreen_modes != NULL)
+ for (j = 0; video.fullscreen_modes[j].width != -1; j++)
+ if (modes[i]->w == video.fullscreen_modes[j].width &&
+ modes[i]->h == video.fullscreen_modes[j].height)
+ found_mode = TRUE;
+
+ if (found_mode) /* screen mode already stored -- skip it */
+ continue;
+
+ /* new mode found; add it to list of available fullscreen modes */
+
+ num_modes++;
+
+ video.fullscreen_modes = checked_realloc(video.fullscreen_modes,
+ (num_modes + 1) *
+ sizeof(struct ScreenModeInfo));
+
+ video.fullscreen_modes[num_modes - 1].width = modes[i]->w;
+ video.fullscreen_modes[num_modes - 1].height = modes[i]->h;
+
+ video.fullscreen_modes[num_modes].width = -1;
+ video.fullscreen_modes[num_modes].height = -1;
+ }
+
+ if (num_modes == 0)
+ {
+ /* no appropriate screen modes available => no fullscreen mode support */
+ // video.fullscreen_available = FALSE;
+ hardware_fullscreen_available = FALSE;
+ }
+ }
+
+ video.fullscreen_available = hardware_fullscreen_available;
+
+#if USE_DESKTOP_FULLSCREEN
+ // in SDL 2.0, there is always support for desktop fullscreen mode
+ // (in SDL 1.2, there is only support for "real" fullscreen mode)
+ video.fullscreen_available = TRUE;
+#endif
+
+#if defined(TARGET_SDL2)
+ if (modes)
+ {
+ for (i = 0; modes[i] != NULL; i++)
+ checked_free(modes[i]);
+
+ checked_free(modes);
+ }
+#endif
+
+ /* open SDL video output device (window or fullscreen mode) */
+ if (!SDLSetVideoMode(backbuffer, fullscreen))
+ Error(ERR_EXIT, "setting video mode failed");
+
+ /* !!! SDL2 can only set the window icon if the window already exists !!! */
+ /* set window icon */
+ SDLSetWindowIcon(program.sdl_icon_filename);
+
+ /* set window and icon title */
+#if defined(TARGET_SDL2)
+ SDL_SetWindowTitle(sdl_window, program.window_title);
+#else
+ SDL_WM_SetCaption(program.window_title, program.window_title);
+#endif
+
+ /* SDL cannot directly draw to the visible video framebuffer like X11,
+ but always uses a backbuffer, which is then blitted to the visible
+ video framebuffer with 'SDL_UpdateRect' (or replaced with the current
+ visible video framebuffer with 'SDL_Flip', if the hardware supports
+ this). Therefore do not use an additional backbuffer for drawing, but
+ use a symbolic buffer (distinguishable from the SDL backbuffer) called
+ 'window', which indicates that the SDL backbuffer should be updated to
+ the visible video framebuffer when attempting to blit to it.
+
+ For convenience, it seems to be a good idea to create this symbolic
+ buffer 'window' at the same size as the SDL backbuffer. Although it
+ should never be drawn to directly, it would do no harm nevertheless. */
+
+ /* create additional (symbolic) buffer for double-buffering */
+ ReCreateBitmap(window, video.width, video.height, video.depth);
+}
+
+static SDL_Surface *SDLCreateScreen(DrawBuffer **backbuffer,
+ boolean fullscreen)
+{
+ SDL_Surface *new_surface = NULL;
+
+#if defined(TARGET_SDL2)
+ static boolean fullscreen_enabled = FALSE;
+ int surface_flags_window = SURFACE_FLAGS | SDL_WINDOW_RESIZABLE;
+#if USE_DESKTOP_FULLSCREEN
+ int surface_flags_fullscreen = SURFACE_FLAGS | SDL_WINDOW_FULLSCREEN_DESKTOP;
+#else
+ int surface_flags_fullscreen = SURFACE_FLAGS | SDL_WINDOW_FULLSCREEN;
+#endif
+
+#else
+ int surface_flags_window = SURFACE_FLAGS;
+ int surface_flags_fullscreen = SURFACE_FLAGS | SDL_FULLSCREEN;
+#endif
+
+ int width = (fullscreen ? fullscreen_width : video.width);
+ int height = (fullscreen ? fullscreen_height : video.height);
+ int surface_flags = (fullscreen ? surface_flags_fullscreen :
+ surface_flags_window);
+
+ // default window size is unscaled
+ video.window_width = video.width;
+ video.window_height = video.height;
+
+#if defined(TARGET_SDL2)
+
+ // store if initial screen mode on game start is fullscreen mode
+ if (sdl_window == NULL)
+ video.fullscreen_initial = fullscreen;
+
+#if USE_RENDERER
+ float window_scaling_factor = (float)setup.window_scaling_percent / 100;
+#if !USE_DESKTOP_FULLSCREEN
+ float screen_scaling_factor = (fullscreen ? 1 : window_scaling_factor);
+#endif
+
+ video.window_width = window_scaling_factor * width;
+ video.window_height = window_scaling_factor * height;
+
+ if ((*backbuffer)->surface)
+ {
+ SDL_FreeSurface((*backbuffer)->surface);
+ (*backbuffer)->surface = NULL;
+ }
+
+ if (sdl_texture)
+ {
+ SDL_DestroyTexture(sdl_texture);
+ sdl_texture = NULL;
+ }
+
+ if (!(fullscreen && fullscreen_enabled))
+ {
+ if (sdl_renderer)
+ {
+ SDL_DestroyRenderer(sdl_renderer);
+ sdl_renderer = NULL;
+ }
+
+ if (sdl_window)
+ {
+ SDL_DestroyWindow(sdl_window);
+ sdl_window = NULL;
+ }
+ }
+
+ if (sdl_window == NULL)
+ sdl_window = SDL_CreateWindow(program.window_title,
+ SDL_WINDOWPOS_CENTERED,
+ SDL_WINDOWPOS_CENTERED,
+#if USE_DESKTOP_FULLSCREEN
+ video.window_width,
+ video.window_height,
+#else
+ (int)(screen_scaling_factor * width),
+ (int)(screen_scaling_factor * height),
+#endif
+ surface_flags);
+
+ if (sdl_window != NULL)
+ {
+#if 0
+ /* if SDL_CreateRenderer() is called from within a VirtualBox Windows VM
+ *without* enabling 2D/3D acceleration and/or guest additions installed,
+ it will crash if flags are *not* set to SDL_RENDERER_SOFTWARE (because
+ it will try to use accelerated graphics and apparently fails miserably) */
+ if (sdl_renderer == NULL)
+ sdl_renderer = SDL_CreateRenderer(sdl_window, -1, SDL_RENDERER_SOFTWARE);
+#else
+ if (sdl_renderer == NULL)
+ sdl_renderer = SDL_CreateRenderer(sdl_window, -1, 0);
+#endif
+
+ if (sdl_renderer != NULL)
+ {
+ SDL_RenderSetLogicalSize(sdl_renderer, width, height);
+ // SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
+ SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, setup.window_scaling_quality);
+
+ sdl_texture = SDL_CreateTexture(sdl_renderer,
+ SDL_PIXELFORMAT_ARGB8888,
+ SDL_TEXTUREACCESS_STREAMING,
+ width, height);
+
+ if (sdl_texture != NULL)
+ {
+ // use SDL default values for RGB masks and no alpha channel
+ new_surface = SDL_CreateRGBSurface(0, width, height, 32, 0,0,0, 0);
+
+ if (new_surface == NULL)
+ Error(ERR_WARN, "SDL_CreateRGBSurface() failed: %s",
+ SDL_GetError());
+ }
+ else
+ {
+ Error(ERR_WARN, "SDL_CreateTexture() failed: %s", SDL_GetError());
+ }
+ }
+ else
+ {
+ Error(ERR_WARN, "SDL_CreateRenderer() failed: %s", SDL_GetError());
+ }
+ }
+ else
+ {
+ Error(ERR_WARN, "SDL_CreateWindow() failed: %s", SDL_GetError());
+ }
+
+#else
+
+ if (sdl_window)
+ SDL_DestroyWindow(sdl_window);
+
+ sdl_window = SDL_CreateWindow(program.window_title,
+ SDL_WINDOWPOS_CENTERED,
+ SDL_WINDOWPOS_CENTERED,
+ width, height,
+ surface_flags);
+
+ if (sdl_window != NULL)
+ new_surface = SDL_GetWindowSurface(sdl_window);
+#endif
+
+#else
+ new_surface = SDL_SetVideoMode(width, height, video.depth, surface_flags);
+#endif
+
+#if defined(TARGET_SDL2)
+ // store fullscreen state ("video.fullscreen_enabled" may not reflect this!)
+ if (new_surface != NULL)
+ fullscreen_enabled = fullscreen;
+#endif
+
+ return new_surface;
+}
+
+boolean SDLSetVideoMode(DrawBuffer **backbuffer, boolean fullscreen)
+{
+ boolean success = TRUE;
+ SDL_Surface *new_surface = NULL;
+
+ SetWindowTitle();
+
+ if (*backbuffer == NULL)
+ *backbuffer = CreateBitmapStruct();
+
+ /* (real bitmap might be larger in fullscreen mode with video offsets) */
+ (*backbuffer)->width = video.width;
+ (*backbuffer)->height = video.height;
+
+ if (fullscreen && !video.fullscreen_enabled && video.fullscreen_available)
+ {
+ setFullscreenParameters(setup.fullscreen_mode);
+
+ video_xoffset = fullscreen_xoffset;
+ video_yoffset = fullscreen_yoffset;
+
+ /* switch display to fullscreen mode, if available */
+ new_surface = SDLCreateScreen(backbuffer, TRUE);
+
+ if (new_surface == NULL)
+ {
+ /* switching display to fullscreen mode failed */
+ Error(ERR_WARN, "SDL_SetVideoMode() failed: %s", SDL_GetError());
+
+ /* do not try it again */
+ video.fullscreen_available = FALSE;
+
+ success = FALSE;
+ }
+ else
+ {
+ (*backbuffer)->surface = new_surface;
+
+ video.fullscreen_enabled = TRUE;
+ video.fullscreen_mode_current = setup.fullscreen_mode;
+
+ success = TRUE;
+ }
+ }
+
+ if ((!fullscreen && video.fullscreen_enabled) || new_surface == NULL)
+ {
+ video_xoffset = 0;
+ video_yoffset = 0;
+
+ /* switch display to window mode */
+ new_surface = SDLCreateScreen(backbuffer, FALSE);
+
+ if (new_surface == NULL)
+ {
+ /* switching display to window mode failed -- should not happen */
+ Error(ERR_WARN, "SDL_SetVideoMode() failed: %s", SDL_GetError());
+
+ success = FALSE;
+ }
+ else
+ {
+ (*backbuffer)->surface = new_surface;
+
+ video.fullscreen_enabled = FALSE;
+ video.window_scaling_percent = setup.window_scaling_percent;
+ video.window_scaling_quality = setup.window_scaling_quality;
+
+ success = TRUE;
+ }
+ }
+
+#if defined(TARGET_SDL2)
+ SDLRedrawWindow(); // map window
+#endif
+
+ SDL_EventState(SDL_SYSWMEVENT, SDL_ENABLE);
+
+#if defined(PLATFORM_WIN32)
+ {
+ SDL_SysWMinfo wminfo;
+ HWND hwnd;
+ boolean wminfo_success = FALSE;
+
+ SDL_VERSION(&wminfo.version);
+#if defined(TARGET_SDL2)
+ if (sdl_window)
+ wminfo_success = SDL_GetWindowWMInfo(sdl_window, &wminfo);
+#else
+ wminfo_success = (SDL_GetWMInfo(&wminfo) == 1);
+#endif
+
+ if (wminfo_success)
+ {
+#if defined(TARGET_SDL2)
+ hwnd = wminfo.info.win.window;
+#else
+ hwnd = wminfo.window;
+#endif
+
+ DragAcceptFiles(hwnd, TRUE);
+ }
+ }
+#endif
+
+ return success;
+}
+
+void SDLSetWindowTitle()
+{
+#if defined(TARGET_SDL2)
+ SDL_SetWindowTitle(sdl_window, program.window_title);
+#else
+ SDL_WM_SetCaption(program.window_title, program.window_title);
+#endif
+}
+
+#if defined(TARGET_SDL2)
+void SDLSetWindowScaling(int window_scaling_percent)
+{
+ if (sdl_window == NULL)
+ return;
+
+ float window_scaling_factor = (float)window_scaling_percent / 100;
+ int new_window_width = (int)(window_scaling_factor * video.width);
+ int new_window_height = (int)(window_scaling_factor * video.height);
+
+ SDL_SetWindowSize(sdl_window, new_window_width, new_window_height);
+
+ video.window_scaling_percent = window_scaling_percent;
+ video.window_width = new_window_width;
+ video.window_height = new_window_height;
+
+ SetWindowTitle();
+}
+
+void SDLSetWindowScalingQuality(char *window_scaling_quality)
+{
+ if (sdl_texture == NULL)
+ return;
+
+ SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, window_scaling_quality);
+
+ SDL_Texture *new_texture = SDL_CreateTexture(sdl_renderer,
+ SDL_PIXELFORMAT_ARGB8888,
+ SDL_TEXTUREACCESS_STREAMING,
+ video.width, video.height);
+
+ if (new_texture != NULL)
+ {
+ SDL_DestroyTexture(sdl_texture);
+
+ sdl_texture = new_texture;
+
+ SDLRedrawWindow();
+ }
+
+ video.window_scaling_quality = window_scaling_quality;
+}
+
+void SDLSetWindowFullscreen(boolean fullscreen)
+{
+ if (sdl_window == NULL)
+ return;
+
+#if USE_DESKTOP_FULLSCREEN
+ int flags = (fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
+#else
+ int flags = (fullscreen ? SDL_WINDOW_FULLSCREEN : 0);
+#endif
+
+ if (SDL_SetWindowFullscreen(sdl_window, flags) == 0)
+ video.fullscreen_enabled = fullscreen;
+
+ // if game started in fullscreen mode, window will also get fullscreen size
+ if (!fullscreen && video.fullscreen_initial)
+ {
+ SDLSetWindowScaling(setup.window_scaling_percent);
+ SDL_SetWindowPosition(sdl_window,
+ SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
+
+ video.fullscreen_initial = FALSE;
+ }
+}
+
+void SDLRedrawWindow()
+{
+ UpdateScreen(NULL);
+}
+#endif
+
+void SDLCreateBitmapContent(Bitmap *bitmap, int width, int height,
+ int depth)
+{
+ SDL_Surface *surface =
+ SDL_CreateRGBSurface(SURFACE_FLAGS, width, height, depth, 0,0,0, 0);
+
+ if (surface == NULL)
+ Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError());
+
+ SDLSetNativeSurface(&surface);
+
+ bitmap->surface = surface;
+}
+
+void SDLFreeBitmapPointers(Bitmap *bitmap)
+{
+ if (bitmap->surface)
+ SDL_FreeSurface(bitmap->surface);
+ if (bitmap->surface_masked)
+ SDL_FreeSurface(bitmap->surface_masked);
+ bitmap->surface = NULL;
+ bitmap->surface_masked = NULL;
+}
+
+void SDLCopyArea(Bitmap *src_bitmap, Bitmap *dst_bitmap,
+ int src_x, int src_y, int width, int height,
+ int dst_x, int dst_y, int mask_mode)
+{
+ Bitmap *real_dst_bitmap = (dst_bitmap == window ? backbuffer : dst_bitmap);
+ SDL_Rect src_rect, dst_rect;
+
+ if (src_bitmap == backbuffer)
+ {
+ src_x += video_xoffset;
+ src_y += video_yoffset;
+ }
+
+ src_rect.x = src_x;
+ src_rect.y = src_y;
+ src_rect.w = width;
+ src_rect.h = height;
+
+ if (dst_bitmap == backbuffer || dst_bitmap == window)
+ {
+ dst_x += video_xoffset;
+ dst_y += video_yoffset;
+ }
+
+ dst_rect.x = dst_x;
+ dst_rect.y = dst_y;
+ dst_rect.w = width;
+ dst_rect.h = height;
+
+ // if (src_bitmap != backbuffer || dst_bitmap != window)
+ if (!(src_bitmap == backbuffer && dst_bitmap == window))
+ SDL_BlitSurface((mask_mode == BLIT_MASKED ?
+ src_bitmap->surface_masked : src_bitmap->surface),
+ &src_rect, real_dst_bitmap->surface, &dst_rect);
+
+#if defined(TARGET_SDL2)
+ if (dst_bitmap == window)
+ {
+ // SDL_UpdateWindowSurface(sdl_window);
+ // SDL_UpdateWindowSurfaceRects(sdl_window, &dst_rect, 1);
+ UpdateScreen(&dst_rect);
+ }
+#else
+ if (dst_bitmap == window)
+ {
+ // SDL_UpdateRect(backbuffer->surface, dst_x, dst_y, width, height);
+ UpdateScreen(&dst_rect);
+ }
+#endif
+}
+
+void SDLFillRectangle(Bitmap *dst_bitmap, int x, int y, int width, int height,
+ Uint32 color)
+{
+ Bitmap *real_dst_bitmap = (dst_bitmap == window ? backbuffer : dst_bitmap);
+ SDL_Rect rect;
+
+ if (dst_bitmap == backbuffer || dst_bitmap == window)
+ {
+ x += video_xoffset;
+ y += video_yoffset;
+ }
+
+ rect.x = x;
+ rect.y = y;
+ rect.w = width;
+ rect.h = height;
+
+ SDL_FillRect(real_dst_bitmap->surface, &rect, color);
+
+#if defined(TARGET_SDL2)
+ if (dst_bitmap == window)
+ {
+ // SDL_UpdateWindowSurface(sdl_window);
+ // SDL_UpdateWindowSurfaceRects(sdl_window, &rect, 1);
+ UpdateScreen(&rect);
+ }
+#else
+ if (dst_bitmap == window)
+ {
+ // SDL_UpdateRect(backbuffer->surface, x, y, width, height);
+ UpdateScreen(&rect);
+ }
+#endif
+}
+
+void SDLFadeRectangle(Bitmap *bitmap_cross, int x, int y, int width, int height,
+ int fade_mode, int fade_delay, int post_delay,
+ void (*draw_border_function)(void))
+{
+ static boolean initialization_needed = TRUE;
+ static SDL_Surface *surface_source = NULL;
+ static SDL_Surface *surface_target = NULL;
+ static SDL_Surface *surface_black = NULL;
+ SDL_Surface *surface_screen = backbuffer->surface;
+ SDL_Surface *surface_cross = (bitmap_cross ? bitmap_cross->surface : NULL);
+ SDL_Rect src_rect, dst_rect;
+ SDL_Rect dst_rect2;
+ int src_x = x, src_y = y;
+ int dst_x = x, dst_y = y;
+ unsigned int time_last, time_current;
+
+ /* check if screen size has changed */
+ if (surface_source != NULL && (video.width != surface_source->w ||
+ video.height != surface_source->h))
+ {
+ SDL_FreeSurface(surface_source);
+ SDL_FreeSurface(surface_target);
+ SDL_FreeSurface(surface_black);
+
+ initialization_needed = TRUE;
+ }
+
+ src_rect.x = src_x;
+ src_rect.y = src_y;
+ src_rect.w = width;
+ src_rect.h = height;
+
+ dst_x += video_xoffset;
+ dst_y += video_yoffset;
+
+ dst_rect.x = dst_x;
+ dst_rect.y = dst_y;
+ dst_rect.w = width; /* (ignored) */
+ dst_rect.h = height; /* (ignored) */
+
+ dst_rect2 = dst_rect;
+
+ if (initialization_needed)
+ {
+#if defined(TARGET_SDL2)
+ unsigned int flags = 0;
+#else
+ unsigned int flags = SDL_SRCALPHA;
+
+ /* use same surface type as screen surface */
+ if ((surface_screen->flags & SDL_HWSURFACE))
+ flags |= SDL_HWSURFACE;
+ else
+ flags |= SDL_SWSURFACE;
+#endif
+
+ /* create surface for temporary copy of screen buffer (source) */
+ if ((surface_source =
+ SDL_CreateRGBSurface(flags,
+ video.width,
+ video.height,
+ surface_screen->format->BitsPerPixel,
+ surface_screen->format->Rmask,
+ surface_screen->format->Gmask,
+ surface_screen->format->Bmask,
+ surface_screen->format->Amask)) == NULL)
+ Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError());
+
+ /* create surface for cross-fading screen buffer (target) */
+ if ((surface_target =
+ SDL_CreateRGBSurface(flags,
+ video.width,
+ video.height,
+ surface_screen->format->BitsPerPixel,
+ surface_screen->format->Rmask,
+ surface_screen->format->Gmask,
+ surface_screen->format->Bmask,
+ surface_screen->format->Amask)) == NULL)
+ Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError());
+
+ /* create black surface for fading from/to black */
+ if ((surface_black =
+ SDL_CreateRGBSurface(flags,
+ video.width,
+ video.height,
+ surface_screen->format->BitsPerPixel,
+ surface_screen->format->Rmask,
+ surface_screen->format->Gmask,
+ surface_screen->format->Bmask,
+ surface_screen->format->Amask)) == NULL)
+ Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError());
+
+ /* completely fill the surface with black color pixels */
+ SDL_FillRect(surface_black, NULL,
+ SDL_MapRGB(surface_screen->format, 0, 0, 0));
+
+ initialization_needed = FALSE;
+ }
+
+ /* copy source and target surfaces to temporary surfaces for fading */
+ if (fade_mode & FADE_TYPE_TRANSFORM)
+ {
+ SDL_BlitSurface(surface_cross, &src_rect, surface_source, &src_rect);
+ SDL_BlitSurface(surface_screen, &dst_rect, surface_target, &src_rect);
+ }
+ else if (fade_mode & FADE_TYPE_FADE_IN)
+ {
+ SDL_BlitSurface(surface_black, &src_rect, surface_source, &src_rect);
+ SDL_BlitSurface(surface_screen, &dst_rect, surface_target, &src_rect);
+ }
+ else /* FADE_TYPE_FADE_OUT */
+ {
+ SDL_BlitSurface(surface_screen, &dst_rect, surface_source, &src_rect);
+ SDL_BlitSurface(surface_black, &src_rect, surface_target, &src_rect);
+ }
+
+ time_current = SDL_GetTicks();
+
+ if (fade_mode == FADE_MODE_MELT)
+ {
+ boolean done = FALSE;
+ int melt_pixels = 2;
+ int melt_columns = width / melt_pixels;
+ int ypos[melt_columns];
+ int max_steps = height / 8 + 32;
+ int steps_done = 0;
+ float steps = 0;
+ int i;
+
+ SDL_BlitSurface(surface_source, &src_rect, surface_screen, &dst_rect);
+#if defined(TARGET_SDL2)
+ SDL_SetSurfaceBlendMode(surface_target, SDL_BLENDMODE_NONE);
+#else
+ SDL_SetAlpha(surface_target, 0, 0); /* disable alpha blending */
+#endif
+
+ ypos[0] = -GetSimpleRandom(16);
+
+ for (i = 1 ; i < melt_columns; i++)
+ {
+ int r = GetSimpleRandom(3) - 1; /* randomly choose from { -1, 0, -1 } */
+
+ ypos[i] = ypos[i - 1] + r;
+
+ if (ypos[i] > 0)
+ ypos[i] = 0;
+ else
+ if (ypos[i] == -16)
+ ypos[i] = -15;
+ }
+
+ while (!done)
+ {
+ int steps_final;
+
+ time_last = time_current;
+ time_current = SDL_GetTicks();
+ steps += max_steps * ((float)(time_current - time_last) / fade_delay);
+ steps_final = MIN(MAX(0, steps), max_steps);
+
+ steps_done++;
+
+ done = (steps_done >= steps_final);
+
+ for (i = 0 ; i < melt_columns; i++)
+ {
+ if (ypos[i] < 0)
+ {
+ ypos[i]++;
+
+ done = FALSE;
+ }
+ else if (ypos[i] < height)
+ {
+ int y1 = 16;
+ int y2 = 8;
+ int y3 = 8;
+ int dy = (ypos[i] < y1) ? ypos[i] + 1 : y2 + GetSimpleRandom(y3);
+
+ if (ypos[i] + dy >= height)
+ dy = height - ypos[i];
+
+ /* copy part of (appearing) target surface to upper area */
+ src_rect.x = src_x + i * melt_pixels;
+ // src_rect.y = src_y + ypos[i];
+ src_rect.y = src_y;
+ src_rect.w = melt_pixels;
+ // src_rect.h = dy;
+ src_rect.h = ypos[i] + dy;
+
+ dst_rect.x = dst_x + i * melt_pixels;
+ // dst_rect.y = dst_y + ypos[i];
+ dst_rect.y = dst_y;
+
+ if (steps_done >= steps_final)
+ SDL_BlitSurface(surface_target, &src_rect,
+ surface_screen, &dst_rect);
+
+ ypos[i] += dy;
+
+ /* copy part of (disappearing) source surface to lower area */
+ src_rect.x = src_x + i * melt_pixels;
+ src_rect.y = src_y;
+ src_rect.w = melt_pixels;
+ src_rect.h = height - ypos[i];
+
+ dst_rect.x = dst_x + i * melt_pixels;
+ dst_rect.y = dst_y + ypos[i];
+
+ if (steps_done >= steps_final)
+ SDL_BlitSurface(surface_source, &src_rect,
+ surface_screen, &dst_rect);
+
+ done = FALSE;
+ }
+ else
+ {
+ src_rect.x = src_x + i * melt_pixels;
+ src_rect.y = src_y;
+ src_rect.w = melt_pixels;
+ src_rect.h = height;
+
+ dst_rect.x = dst_x + i * melt_pixels;
+ dst_rect.y = dst_y;
+
+ if (steps_done >= steps_final)
+ SDL_BlitSurface(surface_target, &src_rect,
+ surface_screen, &dst_rect);
+ }
+ }
+
+ if (steps_done >= steps_final)
+ {
+ if (draw_border_function != NULL)
+ draw_border_function();
+
+#if defined(TARGET_SDL2)
+ // SDL_UpdateWindowSurface(sdl_window);
+ // SDL_UpdateWindowSurfaceRects(sdl_window, &dst_rect2, 1);
+ UpdateScreen(&dst_rect2);
+#else
+ // SDL_UpdateRect(surface_screen, dst_x, dst_y, width, height);
+ UpdateScreen(&dst_rect2);
+#endif
+ }
+ }
+ }
+ else
+ {
+ float alpha;
+ int alpha_final;
+
+ for (alpha = 0.0; alpha < 255.0;)
+ {
+ time_last = time_current;
+ time_current = SDL_GetTicks();
+ alpha += 255 * ((float)(time_current - time_last) / fade_delay);
+ alpha_final = MIN(MAX(0, alpha), 255);
+
+ /* draw existing (source) image to screen buffer */
+ SDL_BlitSurface(surface_source, &src_rect, surface_screen, &dst_rect);
+
+ /* draw new (target) image to screen buffer using alpha blending */
+#if defined(TARGET_SDL2)
+ SDL_SetSurfaceAlphaMod(surface_target, alpha_final);
+ SDL_SetSurfaceBlendMode(surface_target, SDL_BLENDMODE_BLEND);
+#else
+ SDL_SetAlpha(surface_target, SDL_SRCALPHA, alpha_final);
+#endif
+ SDL_BlitSurface(surface_target, &src_rect, surface_screen, &dst_rect);
+
+ if (draw_border_function != NULL)
+ draw_border_function();
+
+ /* only update the region of the screen that is affected from fading */
+ UpdateScreen(&dst_rect);
+ }
+ }
+
+ Delay(post_delay);
+}
+
+void SDLDrawSimpleLine(Bitmap *dst_bitmap, int from_x, int from_y,
+ int to_x, int to_y, Uint32 color)
+{
+ SDL_Surface *surface = dst_bitmap->surface;
+ SDL_Rect rect;
+
+ if (from_x > to_x)
+ swap_numbers(&from_x, &to_x);
+
+ if (from_y > to_y)
+ swap_numbers(&from_y, &to_y);
+
+ rect.x = from_x;
+ rect.y = from_y;
+ rect.w = (to_x - from_x + 1);
+ rect.h = (to_y - from_y + 1);
+
+ if (dst_bitmap == backbuffer || dst_bitmap == window)
+ {
+ rect.x += video_xoffset;
+ rect.y += video_yoffset;
+ }
+
+ SDL_FillRect(surface, &rect, color);
+}
+
+void SDLDrawLine(Bitmap *dst_bitmap, int from_x, int from_y,
+ int to_x, int to_y, Uint32 color)
+{
+ if (dst_bitmap == backbuffer || dst_bitmap == window)
+ {
+ from_x += video_xoffset;
+ from_y += video_yoffset;
+ to_x += video_xoffset;
+ to_y += video_yoffset;
+ }
+
+ sge_Line(dst_bitmap->surface, from_x, from_y, to_x, to_y, color);
+}
+
+#if ENABLE_UNUSED_CODE
+void SDLDrawLines(SDL_Surface *surface, struct XY *points,
+ int num_points, Uint32 color)
+{
+ int i, x, y;
+ int line_width = 4;
+
+ for (i = 0; i < num_points - 1; i++)
+ {
+ for (x = 0; x < line_width; x++)
+ {
+ for (y = 0; y < line_width; y++)
+ {
+ int dx = x - line_width / 2;
+ int dy = y - line_width / 2;
+
+ if ((x == 0 && y == 0) ||
+ (x == 0 && y == line_width - 1) ||
+ (x == line_width - 1 && y == 0) ||
+ (x == line_width - 1 && y == line_width - 1))
+ continue;
+
+ sge_Line(surface, points[i].x + dx, points[i].y + dy,
+ points[i+1].x + dx, points[i+1].y + dy, color);
+ }
+ }
+ }
+}
+#endif
+
+Pixel SDLGetPixel(Bitmap *src_bitmap, int x, int y)
+{
+ SDL_Surface *surface = src_bitmap->surface;
+
+ if (src_bitmap == backbuffer || src_bitmap == window)
+ {
+ x += video_xoffset;
+ y += video_yoffset;
+ }
+
+ switch (surface->format->BytesPerPixel)
+ {
+ case 1: /* assuming 8-bpp */
+ {
+ return *((Uint8 *)surface->pixels + y * surface->pitch + x);
+ }
+ break;
+
+ case 2: /* probably 15-bpp or 16-bpp */
+ {
+ return *((Uint16 *)surface->pixels + y * surface->pitch / 2 + x);
+ }
+ break;
+
+ case 3: /* slow 24-bpp mode; usually not used */
+ {
+ /* does this work? */
+ Uint8 *pix = (Uint8 *)surface->pixels + y * surface->pitch + x * 3;
+ Uint32 color = 0;
+ int shift;
+
+ shift = surface->format->Rshift;
+ color |= *(pix + shift / 8) >> shift;
+ shift = surface->format->Gshift;
+ color |= *(pix + shift / 8) >> shift;
+ shift = surface->format->Bshift;
+ color |= *(pix + shift / 8) >> shift;
+
+ return color;
+ }
+ break;
+
+ case 4: /* probably 32-bpp */
+ {
+ return *((Uint32 *)surface->pixels + y * surface->pitch / 4 + x);
+ }
+ break;
+ }
+
+ return 0;
+}
+
+
+/* ========================================================================= */
+/* The following functions were taken from the SGE library */
+/* (SDL Graphics Extension Library) by Anders Lindström */
+/* http://www.etek.chalmers.se/~e8cal1/sge/index.html */
+/* ========================================================================= */
+
+void _PutPixel(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color)
+{
+ if (x >= 0 && x <= surface->w - 1 && y >= 0 && y <= surface->h - 1)
+ {
+ switch (surface->format->BytesPerPixel)
+ {
+ case 1:
+ {
+ /* Assuming 8-bpp */
+ *((Uint8 *)surface->pixels + y*surface->pitch + x) = color;
+ }
+ break;
+
+ case 2:
+ {
+ /* Probably 15-bpp or 16-bpp */
+ *((Uint16 *)surface->pixels + y*surface->pitch/2 + x) = color;
+ }
+ break;
+
+ case 3:
+ {
+ /* Slow 24-bpp mode, usually not used */
+ Uint8 *pix;
+ int shift;
+
+ /* Gack - slow, but endian correct */
+ pix = (Uint8 *)surface->pixels + y * surface->pitch + x*3;
+ shift = surface->format->Rshift;
+ *(pix+shift/8) = color>>shift;
+ shift = surface->format->Gshift;
+ *(pix+shift/8) = color>>shift;
+ shift = surface->format->Bshift;
+ *(pix+shift/8) = color>>shift;
+ }
+ break;
+
+ case 4:
+ {
+ /* Probably 32-bpp */
+ *((Uint32 *)surface->pixels + y*surface->pitch/4 + x) = color;
+ }
+ break;
+ }
+ }
+}
+
+void _PutPixelRGB(SDL_Surface *surface, Sint16 x, Sint16 y,
+ Uint8 R, Uint8 G, Uint8 B)
+{
+ _PutPixel(surface, x, y, SDL_MapRGB(surface->format, R, G, B));
+}
+
+void _PutPixel8(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color)
+{
+ *((Uint8 *)surface->pixels + y*surface->pitch + x) = color;
+}
+
+void _PutPixel16(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color)
+{
+ *((Uint16 *)surface->pixels + y*surface->pitch/2 + x) = color;
+}
+
+void _PutPixel24(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color)
+{
+ Uint8 *pix;
+ int shift;
+
+ /* Gack - slow, but endian correct */
+ pix = (Uint8 *)surface->pixels + y * surface->pitch + x*3;
+ shift = surface->format->Rshift;
+ *(pix+shift/8) = color>>shift;
+ shift = surface->format->Gshift;
+ *(pix+shift/8) = color>>shift;
+ shift = surface->format->Bshift;
+ *(pix+shift/8) = color>>shift;
+}
+
+void _PutPixel32(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color)
+{
+ *((Uint32 *)surface->pixels + y*surface->pitch/4 + x) = color;
+}
+
+void _PutPixelX(SDL_Surface *dest,Sint16 x,Sint16 y,Uint32 color)
+{
+ switch (dest->format->BytesPerPixel)
+ {
+ case 1:
+ *((Uint8 *)dest->pixels + y*dest->pitch + x) = color;
+ break;
+
+ case 2:
+ *((Uint16 *)dest->pixels + y*dest->pitch/2 + x) = color;
+ break;
+
+ case 3:
+ _PutPixel24(dest,x,y,color);
+ break;
+
+ case 4:
+ *((Uint32 *)dest->pixels + y*dest->pitch/4 + x) = color;
+ break;
+ }
+}
+
+void sge_PutPixel(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color)
+{
+ if (SDL_MUSTLOCK(surface))
+ {
+ if (SDL_LockSurface(surface) < 0)
+ {
+ return;
+ }
+ }
+
+ _PutPixel(surface, x, y, color);
+
+ if (SDL_MUSTLOCK(surface))
+ {
+ SDL_UnlockSurface(surface);
+ }
+}
+
+void sge_PutPixelRGB(SDL_Surface *surface, Sint16 x, Sint16 y,
+ Uint8 r, Uint8 g, Uint8 b)
+{
+ sge_PutPixel(surface, x, y, SDL_MapRGB(surface->format, r, g, b));
+}
+
+Sint32 sge_CalcYPitch(SDL_Surface *dest, Sint16 y)
+{
+ if (y >= 0 && y <= dest->h - 1)
+ {
+ switch (dest->format->BytesPerPixel)
+ {
+ case 1:
+ return y*dest->pitch;
+ break;
+
+ case 2:
+ return y*dest->pitch/2;
+ break;
+
+ case 3:
+ return y*dest->pitch;
+ break;
+
+ case 4:
+ return y*dest->pitch/4;
+ break;
+ }
+ }
+
+ return -1;
+}
+
+void sge_pPutPixel(SDL_Surface *surface, Sint16 x, Sint32 ypitch, Uint32 color)
+{
+ if (x >= 0 && x <= surface->w - 1 && ypitch >= 0)
+ {
+ switch (surface->format->BytesPerPixel)
+ {
+ case 1:
+ {
+ /* Assuming 8-bpp */
+ *((Uint8 *)surface->pixels + ypitch + x) = color;
+ }
+ break;
+
+ case 2:
+ {
+ /* Probably 15-bpp or 16-bpp */
+ *((Uint16 *)surface->pixels + ypitch + x) = color;
+ }
+ break;
+
+ case 3:
+ {
+ /* Slow 24-bpp mode, usually not used */
+ Uint8 *pix;
+ int shift;
+
+ /* Gack - slow, but endian correct */
+ pix = (Uint8 *)surface->pixels + ypitch + x*3;
+ shift = surface->format->Rshift;
+ *(pix+shift/8) = color>>shift;
+ shift = surface->format->Gshift;
+ *(pix+shift/8) = color>>shift;
+ shift = surface->format->Bshift;
+ *(pix+shift/8) = color>>shift;
+ }
+ break;
+
+ case 4:
+ {
+ /* Probably 32-bpp */
+ *((Uint32 *)surface->pixels + ypitch + x) = color;
+ }
+ break;
+ }
+ }
+}
+
+void sge_HLine(SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y,
+ Uint32 Color)
+{
+ SDL_Rect l;
+
+ if (SDL_MUSTLOCK(Surface))
+ {
+ if (SDL_LockSurface(Surface) < 0)
+ {
+ return;
+ }
+ }
+
+ if (x1 > x2)
+ {
+ Sint16 tmp = x1;
+ x1 = x2;
+ x2 = tmp;
+ }
+
+ /* Do the clipping */
+ if (y < 0 || y > Surface->h - 1 || x1 > Surface->w - 1 || x2 < 0)
+ return;
+ if (x1 < 0)
+ x1 = 0;
+ if (x2 > Surface->w - 1)
+ x2 = Surface->w - 1;
+
+ l.x = x1;
+ l.y = y;
+ l.w = x2 - x1 + 1;
+ l.h = 1;
+
+ SDL_FillRect(Surface, &l, Color);
+
+ if (SDL_MUSTLOCK(Surface))
+ {
+ SDL_UnlockSurface(Surface);
+ }
+}
+
+void sge_HLineRGB(SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y,
+ Uint8 R, Uint8 G, Uint8 B)
+{
+ sge_HLine(Surface, x1, x2, y, SDL_MapRGB(Surface->format, R, G, B));
+}
+
+void _HLine(SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y, Uint32 Color)
+{
+ SDL_Rect l;
+
+ if (x1 > x2)
+ {
+ Sint16 tmp = x1;
+ x1 = x2;
+ x2 = tmp;
+ }
+
+ /* Do the clipping */
+ if (y < 0 || y > Surface->h - 1 || x1 > Surface->w - 1 || x2 < 0)
+ return;
+ if (x1 < 0)
+ x1 = 0;
+ if (x2 > Surface->w - 1)
+ x2 = Surface->w - 1;
+
+ l.x = x1;
+ l.y = y;
+ l.w = x2 - x1 + 1;
+ l.h = 1;
+
+ SDL_FillRect(Surface, &l, Color);
+}
+
+void sge_VLine(SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2,
+ Uint32 Color)
+{
+ SDL_Rect l;
+
+ if (SDL_MUSTLOCK(Surface))
+ {
+ if (SDL_LockSurface(Surface) < 0)
+ {
+ return;
+ }
+ }
+
+ if (y1 > y2)
+ {
+ Sint16 tmp = y1;
+ y1 = y2;
+ y2 = tmp;
+ }
+
+ /* Do the clipping */
+ if (x < 0 || x > Surface->w - 1 || y1 > Surface->h - 1 || y2 < 0)
+ return;
+ if (y1 < 0)
+ y1 = 0;
+ if (y2 > Surface->h - 1)
+ y2 = Surface->h - 1;
+
+ l.x = x;
+ l.y = y1;
+ l.w = 1;
+ l.h = y2 - y1 + 1;
+
+ SDL_FillRect(Surface, &l, Color);
+
+ if (SDL_MUSTLOCK(Surface))
+ {
+ SDL_UnlockSurface(Surface);
+ }
+}
+
+void sge_VLineRGB(SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2,
+ Uint8 R, Uint8 G, Uint8 B)
+{
+ sge_VLine(Surface, x, y1, y2, SDL_MapRGB(Surface->format, R, G, B));
+}
+
+void _VLine(SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2, Uint32 Color)
+{
+ SDL_Rect l;
+
+ if (y1 > y2)
+ {
+ Sint16 tmp = y1;
+ y1 = y2;
+ y2 = tmp;
+ }
+
+ /* Do the clipping */
+ if (x < 0 || x > Surface->w - 1 || y1 > Surface->h - 1 || y2 < 0)
+ return;
+ if (y1 < 0)
+ y1 = 0;
+ if (y2 > Surface->h - 1)
+ y2 = Surface->h - 1;
+
+ l.x = x;
+ l.y = y1;
+ l.w = 1;
+ l.h = y2 - y1 + 1;
+
+ SDL_FillRect(Surface, &l, Color);
+}
+
+void sge_DoLine(SDL_Surface *Surface, Sint16 x1, Sint16 y1,
+ Sint16 x2, Sint16 y2, Uint32 Color,
+ void Callback(SDL_Surface *Surf, Sint16 X, Sint16 Y,
+ Uint32 Color))
+{
+ Sint16 dx, dy, sdx, sdy, x, y, px, py;
+
+ dx = x2 - x1;
+ dy = y2 - y1;
+
+ sdx = (dx < 0) ? -1 : 1;
+ sdy = (dy < 0) ? -1 : 1;
+
+ dx = sdx * dx + 1;
+ dy = sdy * dy + 1;
+
+ x = y = 0;
+
+ px = x1;
+ py = y1;
+
+ if (dx >= dy)