Draws non transparent pixels of the sprite with a color.


void draw_character_ex(BITMAP *bmp, BITMAP *sprite, int x, int y, color, bg);
Draws a copy of the sprite bitmap onto the destination bitmap at the specified position, drawing transparent pixels in the background color (or skipping them if the background color is -1) and setting all other pixels to the specified color. Transparent pixels are marked by a zero in 256-color modes or bright pink for truecolor data (maximum red and blue, zero green). The sprite must be an 8-bit image, even if the destination is a truecolor bitmap. Example:
      BITMAP *logo;
      /* Draw the logo silhouette in red. */
      draw_character_ex(screen, logo, SCREEN_W / 2, SCREEN_H / 2,
			makecol(255, 0, 0), -1);

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