I'm sorry if it's a duplicate, I found lots of issues with gradients but none of the open ones looks similar.
It's apparently the PDF code `/Matrix [440 0 0 -200 20 220]` (line 44 in both files) that causes the problem.

**Configuration:**
- Web browser and its version: Chrome 54
- Operating system and its version: Windows 10
- PDF.js version: 1.6.343

**Steps to reproduce the problem:**
Open attached files:
[radial.pdf](https://github.com/mozilla/pdf.js/files/610302/radial.pdf)
[linear.pdf](https://github.com/mozilla/pdf.js/files/610300/linear.pdf)

**What is the expected behavior?** (Adobe Reader 11)
![image](https://cloud.githubusercontent.com/assets/17966696/20583379/fa80d780-b1f1-11e6-85d2-62dd6970a08c.png)

**What went wrong?** (mozilla.github.io/pdf.js/web/viewer.html)
Gradients aren't correctly transformed
![image](https://cloud.githubusercontent.com/assets/17966696/20583361/cf5bb8a4-b1f1-11e6-9479-9cc606b41187.png)

ps[q + verticesPerRow + 1],
              ps[q + 1],
              ps[q + verticesPerRow],
              cs[q + verticesPerRow + 1],
              cs[q + 1],
              cs[q + verticesPerRow]
            );
          }
        }
        break;
      case "triangles":
        for (i = 0, ii = ps.length; i < ii; i += 3) {
          drawTriangle(
            data,
            context,
            ps[i],
            ps[i + 1],
            ps[i + 2],
            cs[i],
            cs[i + 1],
            cs[i + 2]
          );
        }
        break;
      default:
        throw new Error("illegal figure");
    }
  }
  
  function createMeshCanvas(