/// @func draw_sprite_skew_ext()
/// @arg sprite_index,image_index,x,y,image_xscale,image_yscale,image_angle,image_blend,image_alpha,image_xskew,image_yskew

var sprite   = argument0;
var index    = argument1;
var xx       = argument2;
var yy       = argument3;
var xscale   = argument4;
var yscale   = argument5;
var cosAngle = cos(degtorad(argument6));
var sinAngle = sin(degtorad(argument6));
var tint     = argument7;
var alpha    = argument8;
var hskew    = argument9;
var vskew    = argument10;

// Calculate common operations
var sprTex    = sprite_get_texture(sprite, index);
var sprWidth  = sprite_get_width(sprite);
var sprHeight = sprite_get_height(sprite);
var sprXOrig  = sprite_get_xoffset(sprite);
var sprYOrig  = sprite_get_yoffset(sprite);

var tempX, tempY, tempDir, tempDist;

// Begin drawing primitive
draw_primitive_begin_texture(pr_trianglestrip, sprTex);

// Top-left corner
tempX = (-sprXOrig + (sprYOrig / sprHeight) * hskew) * xscale;
tempY = (-sprYOrig + (sprXOrig / sprWidth) * -vskew) * yscale;
draw_vertex_texture_color(xx + tempX * cosAngle - tempY * sinAngle, yy + tempX * sinAngle + tempY * cosAngle, 0, 0, tint, alpha);

// Top-right corner
tempX = (sprWidth + (sprYOrig / sprHeight) * hskew - sprXOrig) * xscale;
tempY = (-sprYOrig + (1 - sprXOrig / sprWidth) * vskew) * yscale;
draw_vertex_texture_color(xx + tempX * cosAngle - tempY * sinAngle, yy + tempX * sinAngle + tempY * cosAngle, 1, 0, tint, alpha);

// Bottom-left corner
tempX = (-sprXOrig + (1 - sprYOrig / sprHeight) * -hskew) * xscale;
tempY = (sprHeight - sprYOrig + (sprXOrig / sprWidth) * -vskew) * yscale;
draw_vertex_texture_color(xx + tempX * cosAngle - tempY * sinAngle, yy + tempX * sinAngle + tempY * cosAngle, 0, 1, tint, alpha);

// Bottom-right corner
tempX = (sprWidth - sprXOrig + (1 - sprYOrig / sprHeight) * -hskew) * xscale;
tempY = (sprHeight - sprYOrig + (1 - sprXOrig / sprWidth) * vskew) * yscale;
draw_vertex_texture_color(xx + tempX * cosAngle - tempY * sinAngle, yy + tempX * sinAngle + tempY * cosAngle, 1, 1, tint, alpha);

// Finish drawing primitive
draw_primitive_end();