Started adding comments. Still have this weird bug on the mono calculator

src/dialogs.c

@@ -39,7 +39,7 @@ int showtext_opt(Game *game, bopti_image_t *face, char *text,
                  bool start_anim,
                  bool end_anim,
                  void for_each_screen(Game *game, unsigned int i),
-                 int line_duration, bool line_anim, unsigned int start_i,
+                 int line_duration, bool update_screen, unsigned int start_i,
                  bool wait_continue) {
     dfont(&FONT_USED);
     unsigned int i, n, y = PXSIZE, l = 0;
@@ -50,10 +50,17 @@ int showtext_opt(Game *game, bopti_image_t *face, char *text,
     if(start_anim){
         /* Run a little fancy animation. */
         for(i=0;i<=BOX_HEIGHT;i++){
+            /* Redrawing the entire screen, because maybe there was no dialog
+            displayed before. */
             draw(game);
 
+            /* Fill the dialog box with white */
             drect(0, 0, DWIDTH, i*PXSIZE, C_WHITE);
+            /* Draw a thick black line on the bottom of the dialog. */
             drect(0, i*PXSIZE, DWIDTH, (i+1)*PXSIZE, C_BLACK);
+
+            /* Draw the part of the face of the player that can fit correctly in
+             * the dialog drawn. */
             dsubimage(4*PXSIZE, 2*PXSIZE, face, 0, 0, F_WIDTH, (i-8)*PXSIZE,
                 DIMAGE_NONE);
 
@@ -63,16 +70,20 @@ int showtext_opt(Game *game, bopti_image_t *face, char *text,
             game->frame_duration = 0;
         }
     }else{
+        /* Here I'm drawing the same as if start_anim is true, but whitout
+         * making an animation. */
         draw(game);
         drect(0, 0, DWIDTH, BOX_HEIGHT*PXSIZE, C_WHITE);
         drect(0, BOX_HEIGHT*PXSIZE, DWIDTH, (BOX_HEIGHT+1)*PXSIZE, C_BLACK);
         dimage(4*PXSIZE, 2*PXSIZE, face);
 
-        if(line_anim) blit();
+        if(update_screen){
+            blit();
 
             while(game->frame_duration < 20) sleep();
             game->frame_duration = 0;
         }
+    }
     /* We should start to drawing the text on the x axis at BOX_HEIGHT to avoid
      * drawing on the face. */
     for(i=start_i;i<strlen(text);i++){
@@ -111,15 +122,17 @@ int showtext_opt(Game *game, bopti_image_t *face, char *text,
             /* We drew one entire screen, reset everything to draw the next one.
              */
             /* Make a little animation :). */
-            if(line_anim) blit();
+            if(update_screen) blit();
             while(game->frame_duration < line_duration) sleep();
             game->frame_duration = 0;
             /* Ask the user to press EXE to continue. */
             dtext(BOX_HEIGHT*PXSIZE, y, C_BLACK, "[EXE] to continue ...");
         }
         /* Make a little animation :). */
-        if(line_anim) blit();
+        if(update_screen) blit();
         if(l>=max_lines_amount-1){
+            /* If we drew one entire screen. */
+            /* Wait that the EXE key is pressed if we should. */
             if(wait_continue) while(getkey().key != KEY_EXE) sleep();
             /* Clear the text area. */
             drect(BOX_HEIGHT*PXSIZE, 0, DWIDTH, (BOX_HEIGHT-1)*PXSIZE-2,
@@ -129,6 +142,7 @@ int showtext_opt(Game *game, bopti_image_t *face, char *text,
             l = 0;
         }
         else{
+            /* Else, wait a bit for the animation.  */
             while(game->frame_duration < line_duration) sleep();
             game->frame_duration = 0;
         }
@@ -136,12 +150,13 @@ int showtext_opt(Game *game, bopti_image_t *face, char *text,
     if(l<max_lines_amount-1){
         /* If we have not filled everthing with text at the end. */
         /* Make a little animation :). */
-        if(line_anim) blit();
+        if(update_screen) blit();
         while(game->frame_duration < line_duration) sleep();
         game->frame_duration = 0;
         /* Ask the user to press EXE to continue. */
         dtext(BOX_HEIGHT*PXSIZE, y, C_BLACK, "[EXE] to continue ...");
-        if(line_anim) blit();
+        /* Update the screen and wait for EXE being pressed, if needed. */
+        if(update_screen) blit();
         if(wait_continue) while(getkey().key != KEY_EXE) sleep();
     }
     if(call_before_end) return_int = call_before_end(game, i);

src/dialogs.h

@@ -14,7 +14,7 @@ int showtext_opt(Game *game, bopti_image_t *face, char *text,
                  bool start_anim,
                  bool end_anim,
                  void for_each_screen(Game *game, unsigned int i),
-                 int line_duration, bool line_anim, unsigned int start_i,
+                 int line_duration, bool update_screen, unsigned int start_i,
                  bool wait_continue);
 
 void showtext_dialog(Game *game, bopti_image_t *face, char *text,