fixed compiler warnings (after adding "-Wstrict-prototypes")
[rocksndiamonds.git] / src / libgame / sdl.c
index 14ad28fe39d1b696cf748fcc5ede4284428fe1ae..882aa11cd2647031bd972c5390e0796b1bc15cd2 100644 (file)
@@ -62,6 +62,10 @@ static void FinalizeScreen(int draw_target)
   // copy global animations to render target buffer, if defined (above border)
   if (gfx.draw_global_anim_function != NULL)
     gfx.draw_global_anim_function(draw_target, DRAW_GLOBAL_ANIM_STAGE_2);
+
+  // copy tile selection cursor to render target buffer, if defined (above all)
+  if (gfx.draw_tile_cursor_function != NULL)
+    gfx.draw_tile_cursor_function(draw_target);
 }
 
 static void UpdateScreenExt(SDL_Rect *rect, boolean with_frame_delay)
@@ -241,6 +245,20 @@ static void UpdateScreen_WithoutFrameDelay(SDL_Rect *rect)
   UpdateScreenExt(rect, FALSE);
 }
 
+void Delay_WithScreenUpdates(unsigned int delay)
+{
+  unsigned int time_current = SDL_GetTicks();
+  unsigned int time_delayed = time_current + delay;
+
+  while (time_current < time_delayed)
+  {
+    // updating the screen contains waiting for frame delay (non-busy)
+    UpdateScreen_WithFrameDelay(NULL);
+
+    time_current = SDL_GetTicks();
+  }
+}
+
 static void SDLSetWindowIcon(char *basename)
 {
   /* (setting the window icon on Mac OS X would replace the high-quality
@@ -537,7 +555,7 @@ inline static void SDLInitVideoBuffer_VideoBuffer(boolean fullscreen)
   SDLSetWindowTitle();
 }
 
-inline static void SDLInitVideoBuffer_DrawBuffer()
+inline static void SDLInitVideoBuffer_DrawBuffer(void)
 {
   /* SDL cannot directly draw to the visible video framebuffer like X11,
      but always uses a backbuffer, which is then blitted to the visible
@@ -825,7 +843,7 @@ boolean SDLSetVideoMode(boolean fullscreen)
   return success;
 }
 
-void SDLSetWindowTitle()
+void SDLSetWindowTitle(void)
 {
 #if defined(TARGET_SDL2)
   if (sdl_window == NULL)
@@ -918,7 +936,7 @@ void SDLSetWindowFullscreen(boolean fullscreen)
   }
 }
 
-void SDLSetDisplaySize()
+void SDLSetDisplaySize(void)
 {
   SDL_Rect display_bounds;
 
@@ -972,7 +990,7 @@ void SDLSetScreenSizeForRenderer(int width, int height)
   SDL_RenderSetLogicalSize(sdl_renderer, width, height);
 }
 
-void SDLSetScreenProperties()
+void SDLSetScreenProperties(void)
 {
   SDLSetScreenSizeAndOffsets(video.width, video.height);
   SDLSetScreenSizeForRenderer(video.screen_width, video.screen_height);
@@ -995,7 +1013,7 @@ void SDLSetScreenRenderingMode(char *screen_rendering_mode)
 #endif
 }
 
-void SDLRedrawWindow()
+void SDLRedrawWindow(void)
 {
   UpdateScreen_WithoutFrameDelay(NULL);
 }
@@ -1385,20 +1403,7 @@ void SDLFadeRectangle(int x, int y, int width, int height,
   }
 
   if (post_delay > 0)
-  {
-    unsigned int time_post_delay;
-
-    time_current = SDL_GetTicks();
-    time_post_delay = time_current + post_delay;
-
-    while (time_current < time_post_delay)
-    {
-      // updating the screen contains waiting for frame delay (non-busy)
-      UpdateScreen_WithFrameDelay(NULL);
-
-      time_current = SDL_GetTicks();
-    }
-  }
+    Delay_WithScreenUpdates(post_delay);
 
   // restore function for drawing global masked border
   gfx.draw_global_border_function = draw_global_border_function;
@@ -2536,7 +2541,7 @@ void SDLCloseAudio(void)
 /* event functions                                                           */
 /* ========================================================================= */
 
-void SDLNextEvent(Event *event)
+void SDLWaitEvent(Event *event)
 {
   SDL_WaitEvent(event);
 }
@@ -2602,7 +2607,7 @@ static int sdl_js_axis[MAX_PLAYERS][2];
 static int sdl_js_button[MAX_PLAYERS][2];
 static boolean sdl_is_controller[MAX_PLAYERS];
 
-void SDLClearJoystickState()
+void SDLClearJoystickState(void)
 {
   int i, j;
 
@@ -2843,7 +2848,7 @@ void HandleJoystickEvent(Event *event)
   }
 }
 
-void SDLInitJoysticks()
+void SDLInitJoysticks(void)
 {
   static boolean sdl_joystick_subsystem_initialized = FALSE;
   boolean print_warning = !sdl_joystick_subsystem_initialized;
@@ -2980,16 +2985,183 @@ boolean SDLReadJoystick(int nr, int *x, int *y, boolean *b1, boolean *b2)
 /* ========================================================================= */
 
 #if defined(USE_TOUCH_INPUT_OVERLAY)
-static void DrawTouchInputOverlay()
+static void DrawTouchInputOverlay_ShowGrid(int alpha)
+{
+  SDL_Rect rect;
+  int grid_xsize = overlay.grid_xsize;
+  int grid_ysize = overlay.grid_ysize;
+  int x, y;
+
+  SDL_SetRenderDrawColor(sdl_renderer, 255, 255, 255, alpha);
+  SDL_SetRenderDrawBlendMode(sdl_renderer, SDL_BLENDMODE_BLEND);
+
+  for (x = 0; x < grid_xsize; x++)
+  {
+    rect.x = (x + 0) * video.screen_width / grid_xsize;
+    rect.w = (x + 1) * video.screen_width / grid_xsize - rect.x;
+
+    for (y = 0; y < grid_ysize; y++)
+    {
+      rect.y = (y + 0) * video.screen_height / grid_ysize;
+      rect.h = (y + 1) * video.screen_height / grid_ysize - rect.y;
+
+      if (overlay.grid_button[x][y] == CHAR_GRID_BUTTON_NONE)
+       SDL_RenderDrawRect(sdl_renderer, &rect);
+    }
+  }
+
+  SDL_SetRenderDrawColor(sdl_renderer, 0, 0, 0, 255);
+}
+
+static void RenderFillRectangle(int x, int y, int width, int height)
+{
+  SDL_Rect rect = { x, y, width, height };
+
+  SDL_RenderFillRect(sdl_renderer, &rect);
+}
+
+static void DrawTouchInputOverlay_ShowGridButtons(int alpha)
+{
+  static int alpha_direction = 0;
+  static int alpha_highlight = 0;
+  int alpha_max = ALPHA_FROM_TRANSPARENCY(setup.touch.transparency);
+  int alpha_step = ALPHA_FADING_STEPSIZE(alpha_max);
+  SDL_Rect rect;
+  int grid_xsize = overlay.grid_xsize;
+  int grid_ysize = overlay.grid_ysize;
+  int x, y;
+
+  if (alpha == alpha_max)
+  {
+    if (alpha_direction < 0)
+    {
+      alpha_highlight = MAX(0, alpha_highlight - alpha_step);
+
+      if (alpha_highlight == 0)
+       alpha_direction = 1;
+    }
+    else
+    {
+      alpha_highlight = MIN(alpha_highlight + alpha_step, alpha_max);
+
+      if (alpha_highlight == alpha_max)
+       alpha_direction = -1;
+    }
+  }
+  else
+  {
+    alpha_direction = 1;
+    alpha_highlight = alpha;
+  }
+
+  SDL_SetRenderDrawBlendMode(sdl_renderer, SDL_BLENDMODE_BLEND);
+
+  for (x = 0; x < grid_xsize; x++)
+  {
+    for (y = 0; y < grid_ysize; y++)
+    {
+      int grid_button = overlay.grid_button[x][y];
+      int grid_button_action = GET_ACTION_FROM_GRID_BUTTON(grid_button);
+      int alpha_draw = alpha;
+      int outline_border = MV_NONE;
+      int border_size = 2;
+      boolean draw_outlined = setup.touch.draw_outlined;
+      boolean draw_pressed = setup.touch.draw_pressed;
+
+      if (grid_button == CHAR_GRID_BUTTON_NONE)
+       continue;
+
+      if (grid_button == overlay.grid_button_highlight)
+       alpha_draw = alpha_highlight;
+
+      if (draw_pressed && overlay.grid_button_action & grid_button_action)
+      {
+       if (draw_outlined)
+         draw_outlined = FALSE;
+       else
+         alpha_draw = MIN((float)alpha_draw * 1.5, SDL_ALPHA_OPAQUE);
+      }
+
+      SDL_SetRenderDrawColor(sdl_renderer, 255, 255, 255, alpha_draw);
+
+      rect.x = (x + 0) * video.screen_width  / grid_xsize;
+      rect.y = (y + 0) * video.screen_height / grid_ysize;
+      rect.w = (x + 1) * video.screen_width  / grid_xsize - rect.x;
+      rect.h = (y + 1) * video.screen_height / grid_ysize - rect.y;
+
+      if (x == 0 || overlay.grid_button[x - 1][y] != grid_button)
+      {
+       rect.x += border_size;
+       rect.w -= border_size;
+
+       outline_border |= MV_LEFT;
+      }
+
+      if (x == grid_xsize - 1 || overlay.grid_button[x + 1][y] != grid_button)
+      {
+       rect.w -= border_size;
+
+       outline_border |= MV_RIGHT;
+      }
+
+      if (y == 0 || overlay.grid_button[x][y - 1] != grid_button)
+      {
+       rect.y += border_size;
+       rect.h -= border_size;
+
+       outline_border |= MV_UP;
+      }
+
+      if (y == grid_ysize - 1 || overlay.grid_button[x][y + 1] != grid_button)
+      {
+       rect.h -= border_size;
+
+       outline_border |= MV_DOWN;
+      }
+
+      if (draw_outlined)
+      {
+       int rect_x = rect.x +
+         (outline_border & MV_LEFT  ? border_size : 0);
+       int rect_w = rect.w -
+         (outline_border & MV_LEFT  ? border_size : 0) -
+         (outline_border & MV_RIGHT ? border_size : 0);
+
+       if (outline_border & MV_LEFT)
+         RenderFillRectangle(rect.x, rect.y, border_size, rect.h);
+
+       if (outline_border & MV_RIGHT)
+         RenderFillRectangle(rect.x + rect.w - border_size, rect.y,
+                             border_size, rect.h);
+
+       if (outline_border & MV_UP)
+         RenderFillRectangle(rect_x, rect.y, rect_w, border_size);
+
+       if (outline_border & MV_DOWN)
+         RenderFillRectangle(rect_x, rect.y + rect.h - border_size,
+                             rect_w, border_size);
+      }
+      else
+      {
+       SDL_RenderFillRect(sdl_renderer, &rect);
+      }
+    }
+  }
+
+  SDL_SetRenderDrawColor(sdl_renderer, 0, 0, 0, 255);
+}
+
+static void DrawTouchInputOverlay(void)
 {
   static SDL_Texture *texture = NULL;
   static boolean initialized = FALSE;
   static boolean deactivated = TRUE;
+  static boolean show_grid = FALSE;
   static int width = 0, height = 0;
-  static int alpha_max = SDL_ALPHA_OPAQUE / 2;
-  static int alpha_step = 5;
-  static int alpha_last = 0;
+  static int alpha_last = -1;
   static int alpha = 0;
+  int alpha_max = ALPHA_FROM_TRANSPARENCY(setup.touch.transparency);
+  int alpha_step = ALPHA_FADING_STEPSIZE(alpha_max);
   boolean active = (overlay.enabled && overlay.active);
 
   if (!active && deactivated)
@@ -3010,6 +3182,21 @@ static void DrawTouchInputOverlay()
       deactivated = TRUE;
   }
 
+  if (overlay.show_grid)
+    show_grid = TRUE;
+  else if (deactivated)
+    show_grid = FALSE;
+
+  if (show_grid)
+    DrawTouchInputOverlay_ShowGrid(alpha);
+
+  DrawTouchInputOverlay_ShowGridButtons(alpha);
+
+  return;
+
+
+  // !!! VIRTUAL BUTTONS FROM IMAGE FILE NOT USED ANYMORE !!!
+
   if (!initialized)
   {
     char *basename = "overlay/VirtualButtons.png";
@@ -3038,7 +3225,6 @@ static void DrawTouchInputOverlay()
     SDL_FreeSurface(surface);
 
     SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
-    SDL_SetTextureAlphaMod(texture, alpha_max);
 
     initialized = TRUE;
   }