( x0, y0, x1, y1, x2, y2, u0, v0, u1, v1, u2, v2, image )
| 15938 | } |
| 15939 | |
| 15940 | function clipImage( x0, y0, x1, y1, x2, y2, u0, v0, u1, v1, u2, v2, image ) { |
| 15941 | |
| 15942 | // http://extremelysatisfactorytotalitarianism.com/blog/?p=2120 |
| 15943 | |
| 15944 | var a, b, c, d, e, f, det, idet, |
| 15945 | width = image.width - 1, |
| 15946 | height = image.height - 1; |
| 15947 | |
| 15948 | u0 *= width; v0 *= height; |
| 15949 | u1 *= width; v1 *= height; |
| 15950 | u2 *= width; v2 *= height; |
| 15951 | |
| 15952 | x1 -= x0; y1 -= y0; |
| 15953 | x2 -= x0; y2 -= y0; |
| 15954 | |
| 15955 | u1 -= u0; v1 -= v0; |
| 15956 | u2 -= u0; v2 -= v0; |
| 15957 | |
| 15958 | det = u1 * v2 - u2 * v1; |
| 15959 | |
| 15960 | idet = 1 / det; |
| 15961 | |
| 15962 | a = ( v2 * x1 - v1 * x2 ) * idet; |
| 15963 | b = ( v2 * y1 - v1 * y2 ) * idet; |
| 15964 | c = ( u1 * x2 - u2 * x1 ) * idet; |
| 15965 | d = ( u1 * y2 - u2 * y1 ) * idet; |
| 15966 | |
| 15967 | e = x0 - a * u0 - c * v0; |
| 15968 | f = y0 - b * u0 - d * v0; |
| 15969 | |
| 15970 | _context.save(); |
| 15971 | _context.transform( a, b, c, d, e, f ); |
| 15972 | _context.clip(); |
| 15973 | _context.drawImage( image, 0, 0 ); |
| 15974 | _context.restore(); |
| 15975 | |
| 15976 | } |
| 15977 | |
| 15978 | function getGradientTexture( color1, color2, color3, color4 ) { |
| 15979 |
no outgoing calls
no test coverage detected