Text and shapes filled with a gradient

A gradient used as the colour something is filled with: a headline whose letters are windows onto a blend of three colours, and a panel filled with a circular one.

This page is the whole program, for whoever writes your software. There is nothing here to read otherwise. Go back to the document it writes.

JSON write_gradient_fill.json 75 lines

This one is not a program. It is the request the document server is sent: the same page, asked for over the network by an application that writes no PDF code at all.

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{
  "shadings": [
    {
      "name": "letters",
      "shading": {
        "axial": {
          "from": [70.0, 660.0],
          "to": [372.654297, 660.0],
          "space": "rgb",
          "function": {
            "stitching": {
              "functions": [
                {
                  "exponential": {
                    "low": [0.85, 0.12, 0.12],
                    "high": [0.12, 0.55, 0.2]
                  }
                },
                {
                  "exponential": {
                    "low": [0.12, 0.55, 0.2],
                    "high": [0.12, 0.2, 0.8]
                  }
                }
              ],
              "bounds": [0.5],
              "encode": [[0.0, 1.0], [0.0, 1.0]]
            }
          }
        }
      }
    },
    {
      "name": "panel",
      "shading": {
        "radial": {
          "from": [297.5, 445.0, 0.0],
          "to": [297.5, 445.0, 227.5],
          "start": [1.0, 1.0, 1.0],
          "end": [0.1, 0.15, 0.45],
          "extend": [false, true]
        }
      }
    }
  ],
  "items": [
    {
      "type": "text",
      "rect": {"llx": 70, "lly": 660, "urx": 525, "ury": 760.8},
      "content": ["hqf-pdf"],
      "font": "DejaVuSans",
      "font_size": 84,
      "color": {"shading": "letters"}
    },
    {
      "type": "text",
      "rect": {"llx": 70, "lly": 634, "urx": 525, "ury": 649.6},
      "content": ["Text filled with a gradient, through a shading pattern."],
      "font": "DejaVuSans",
      "font_size": 13
    },
    {
      "type": "rect",
      "rect": {"llx": 70, "lly": 350, "urx": 525, "ury": 540},
      "fill": {"shading": "panel"}
    },
    {
      "type": "text",
      "rect": {"llx": 70, "lly": 334, "urx": 525, "ury": 348.4},
      "content": ["A shape filled with a radial gradient."],
      "font": "DejaVuSans",
      "font_size": 12
    }
  ]
}