[cairo] Regression in libpng-1.5.2 affecting cairo

[Ross Alexander]

This is just a heads up that libpng-1.5.2 has a regression which causes corrupted output.  The example below produces a square block of green.  Libpng-1.5.4rc1 produces the correct result (block of blue).

  cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
  cairo_t *cr = cairo_create(surface);
  cairo_rectangle(cr, 0, 0, width, height / 3);
  cairo_set_source_rgb(cr, 0.0, 0.0, 0.8);
  cairo_paint(cr);
  cairo_destroy(cr);
  cairo_surface_write_to_png(surface, "libpng-cairo.png");


Ross Alexander
SAP Basis
NEC Europe Ltd
European Information Systems
Tel:     +44 20 8752 3394

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