Bitmap.cpp

#include "stdafx.h"
#include <assert.h>
#include "Bitmap.h"

Bitmap::Bitmap () {}

Bitmap::Bitmap (LPCWSTR sprite_path)
  {
  sprite = (HBITMAP) LoadImage (NULL, sprite_path, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
  assert (sprite != NULL);
  get_size (sprite, sprite_width, sprite_height);
  }

Bitmap::Bitmap (LPCWSTR sprite_path, LPCWSTR mask_path)
  {
  sprite = (HBITMAP) LoadImage (NULL, sprite_path, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
  mask = (HBITMAP) LoadImage (NULL, mask_path, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);

  assert (sprite != NULL);
  assert (mask != NULL);

  int mask_width, mask_height;
  get_size (sprite, sprite_width, sprite_height);
  get_size (mask, mask_width, mask_height);

  assert (sprite_width == mask_width);
  assert (sprite_height == mask_height);

  is_transparent = true;
  }

Bitmap::~Bitmap () {}

void Bitmap::render (HDC temp_hdc, HDC dest_hdc, int dest_x, int dest_y)
  {
  BITMAP temp_bitmap;
  GetObject (sprite, sizeof (temp_bitmap), &temp_bitmap);
  SelectObject (temp_hdc, sprite);
  BitBlt (dest_hdc, dest_x, dest_y, temp_bitmap.bmWidth, temp_bitmap.bmHeight, temp_hdc, 0, 0, SRCINVERT);
  SelectObject (temp_hdc, mask);
  BitBlt (dest_hdc, dest_x, dest_y, temp_bitmap.bmWidth, temp_bitmap.bmHeight, temp_hdc, 0, 0, SRCAND);
  SelectObject (temp_hdc, sprite);
  BitBlt (dest_hdc, dest_x, dest_y, temp_bitmap.bmWidth, temp_bitmap.bmHeight, temp_hdc, 0, 0, SRCINVERT);
  }

void Bitmap::render (HDC temp_hdc, HDC dest_hdc, int dest_x, int dest_y, float scale)
  {
  BITMAP temp_bitmap;
  GetObject (sprite, sizeof (temp_bitmap), &temp_bitmap);
  SelectObject (temp_hdc, sprite);
  StretchBlt (dest_hdc, dest_x * scale, dest_y * scale, temp_bitmap.bmWidth * scale, temp_bitmap.bmHeight * scale, temp_hdc, 0, 0, temp_bitmap.bmWidth, temp_bitmap.bmHeight, SRCINVERT);
  SelectObject (temp_hdc, mask);
  StretchBlt (dest_hdc, dest_x * scale, dest_y * scale, temp_bitmap.bmWidth * scale, temp_bitmap.bmHeight * scale, temp_hdc, 0, 0, temp_bitmap.bmWidth, temp_bitmap.bmHeight, SRCAND);
  SelectObject (temp_hdc, sprite);
  StretchBlt (dest_hdc, dest_x * scale, dest_y * scale, temp_bitmap.bmWidth * scale, temp_bitmap.bmHeight * scale, temp_hdc, 0, 0, temp_bitmap.bmWidth, temp_bitmap.bmHeight, SRCINVERT);
  }

void Bitmap::render (HDC temp_hdc, HDC dest_hdc, int source_x, int source_y, int width, int height, int dest_x, int dest_y, float scale)
  {
  BITMAP temp_bitmap;
  GetObject (sprite, sizeof (temp_bitmap), &temp_bitmap);
  SelectObject (temp_hdc, sprite);
  StretchBlt (dest_hdc, dest_x * scale, dest_y * scale, width * scale, height * scale, temp_hdc, source_x, source_y, width, height, SRCINVERT);
  SelectObject (temp_hdc, mask);
  StretchBlt (dest_hdc, dest_x * scale, dest_y * scale, width * scale, height * scale, temp_hdc, source_x, source_y, width, height, SRCAND);
  SelectObject (temp_hdc, sprite);
  StretchBlt (dest_hdc, dest_x * scale, dest_y * scale, width * scale, height * scale, temp_hdc, source_x, source_y, width, height, SRCINVERT);
  }

void Bitmap::get_size (HBITMAP hbitmap, int &width, int &height)
  {
  BITMAP temp_bitmap;
  GetObject (hbitmap, sizeof (temp_bitmap), &temp_bitmap);
  width = temp_bitmap.bmWidth;
  height = temp_bitmap.bmHeight;
  }