Module: ImageRuby::ImageRubyCMixin

Defined in:
lib/imageruby-c.rb,
ext/imagecruby_base/imagecruby_base.c

Instance Method Summary collapse

Instance Method Details

#c_color_replace(rb_color1, rb_color2) ⇒ Object 



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# File 'ext/imagecruby_base/imagecruby_base.c', line 28

VALUE c_color_replace(VALUE self, VALUE rb_color1, VALUE rb_color2) {
  VALUE rb_color1_string = rb_funcall(rb_color1, id_to_s, 0);
  const char* color1_string = RSTRING(rb_color1_string)->ptr;

  VALUE rb_color2_string = rb_funcall(rb_color2, id_to_s, 0);
  const char* color2_string = RSTRING(rb_color2_string)->ptr;

  int color2_alpha = FIX2INT( rb_funcall(rb_color2, id_a, 0) );

  int self_width = FIX2INT( rb_funcall(self, id_width, 0) );
  int self_height = FIX2INT( rb_funcall(self, id_height, 0) );

  VALUE rb_self_pixel_data = rb_funcall(self, id_pixel_data, 0);
  char* self_pixel_data = RSTRING(rb_self_pixel_data)->ptr;

  VALUE rb_self_alpha_data = rb_funcall(self, id_alpha_data, 0);
  char* self_alpha_data = RSTRING(rb_self_alpha_data)->ptr;

  int y_;
  int x_;
  for (y_ = 0; y_ < self_height; y_++) {

    for (x_ = 0; x_ < self_width; x_++) {

      if (
        self_pixel_data[x_*3] == color1_string[0] &&
        self_pixel_data[x_*3+1] == color1_string[1] &&
        self_pixel_data[x_*3+2] == color1_string[2]
        ) {

        self_pixel_data[x_*3] = color2_string[0];
        self_pixel_data[x_*3+1] = color2_string[1];
        self_pixel_data[x_*3+2] = color2_string[2];
        self_alpha_data[x_] = color2_alpha;
      }
    }

    self_alpha_data += self_width;
    self_pixel_data += (self_width * 3);

  }

  return self;
}

#c_draw(rb_x, rb_y, rb_image) ⇒ Object

VALUE c_draw_with_mask(VALUE self, VALUE rb_x, VALUE rb_y, VALUE rb_image, VALUE rb_mask_color) {

int x = FIX2INT(rb_x); int y = FIX2INT(rb_y);

int image_width = FIX2INT( rb_funcall(rb_image, id_width, 0) ); int image_height = FIX2INT( rb_funcall(rb_image, id_height, 0) );

int self_width = FIX2INT( rb_funcall(self, id_width, 0) ); int self_height = FIX2INT( rb_funcall(self, id_height, 0) );

VALUE rb_color_string = rb_funcall(rb_mask_color, id_to_s, 0); const char* color_string = RSTRING(rb_color_string)->ptr;

VALUE rb_image_pixel_data = rb_funcall(rb_image, id_pixel_data, 0); const char* image_pixel_data = RSTRING(rb_image_pixel_data)->ptr;

VALUE rb_self_pixel_data = rb_funcall(self, id_pixel_data, 0); char* self_pixel_data = RSTRING(rb_self_pixel_data)->ptr;

self_pixel_data = (x y * self_width) * 3;

int y_; int x_; for (y_ = 0; y_ < image_height; y_++) {

for (x_ = 0; x_ < image_width; x_++) {

if ( image_pixel_data != color_string || image_pixel_data != color_string || image_pixel_data != color_string ) {

self_pixel_data = image_pixel_data; self_pixel_data = image_pixel_data; self_pixel_data = image_pixel_data; } }

self_pixel_data = (self_width * 3); image_pixel_data = (image_width * 3);

}

return self;

}



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# File 'ext/imagecruby_base/imagecruby_base.c', line 122

VALUE c_draw(VALUE self, VALUE rb_x, VALUE rb_y, VALUE rb_image) {

  int x = FIX2INT(rb_x);
  int y = FIX2INT(rb_y);

  int image_width = FIX2INT( rb_funcall(rb_image, id_width, 0) );
  int image_height = FIX2INT( rb_funcall(rb_image, id_height, 0) );

  int self_width = FIX2INT( rb_funcall(self, id_width, 0) );
  int self_height = FIX2INT( rb_funcall(self, id_height, 0) );

  VALUE rb_image_pixel_data = rb_funcall(rb_image, id_pixel_data, 0);
  const unsigned char* image_pixel_data = RSTRING(rb_image_pixel_data)->ptr;

  VALUE rb_self_pixel_data = rb_funcall(self, id_pixel_data, 0);
  unsigned char* self_pixel_data = RSTRING(rb_self_pixel_data)->ptr;

  VALUE rb_image_alpha_data = rb_funcall(rb_image, id_alpha_data, 0);
  unsigned char* image_alpha_data = RSTRING(rb_image_alpha_data)->ptr;

  self_pixel_data += (x + y * self_width) * 3;

  int included_image_width = image_width;

  if (x + included_image_width > self_width) {
    included_image_width = self_width - x;
  }

  int y_;
  int x_;
  for (y_ = 0; y_ < image_height; y_++) {

    for (x_ = 0; x_ < included_image_width; x_++) {

      unsigned int alpha = image_alpha_data[x_];

      if (alpha < 255) {
        if (alpha > 0) {
          self_pixel_data[x_*3] = ( self_pixel_data[x_*3]*(255-alpha) + image_pixel_data[x_*3]*alpha ) / 255;
          self_pixel_data[x_*3+1] = ( self_pixel_data[x_*3+1]*(255-alpha) + image_pixel_data[x_*3+1]*alpha ) / 255;
          self_pixel_data[x_*3+2] = ( self_pixel_data[x_*3+2]*(255-alpha) + image_pixel_data[x_*3+2]*alpha ) / 255;
        }
      } else {
        self_pixel_data[x_*3] = image_pixel_data[x_*3];
        self_pixel_data[x_*3+1] = image_pixel_data[x_*3+1];
        self_pixel_data[x_*3+2] = image_pixel_data[x_*3+2];
      }
    }

    self_pixel_data += (self_width * 3);
    image_alpha_data += image_width;
    image_pixel_data += (image_width * 3);

  }

  return self;
}

#color_replace!(color1, color2) ⇒ Object 



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# File 'lib/imageruby-c.rb', line 30

def color_replace!(color1, color2)
  c_color_replace(color1, color2)
end

#draw!(x, y, image) ⇒ Object 



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# File 'lib/imageruby-c.rb', line 26

def draw!(x,y,image)
  c_draw(x,y,image)
end