[PATCH 0/5] Implement floating point support in cairo.

pixman 0.36.0 introduces support for floating point formats, so it's time
to enable this in cairo.

To actually use the extended precision in gradients, you need:
https://lists.freedesktop.org/archives/pixman/2018-December/004794.html

pixman-bits-image.c is still 8-bits-extended-to-float when transforms or
alpha mapping is used, so this needs fixing if you want true 32-bits all
the time. However this doesn't change the API, so I'm posting this series
now with more confidence.

Maarten Lankhorst (5):
  cairo-trace: Simplify bigendian case in emit_image.
  Add support for RGBA128F and RGB96F formats.
  png: Add support for writing new floating point formats as 16 bpc png.
  png: Add support for 16 bpc png reading as floating point format
  boilerplate: Add support for new float formats.

 boilerplate/cairo-boilerplate.c            | 154 +++++++++++++++---
 configure.ac                               |   2 +-
 perf/micro/fill-clip.c                     |   2 +
 perf/micro/pixel.c                         |   2 +
 src/cairo-debug.c                          |   6 +
 src/cairo-image-compositor.c               |   4 +
 src/cairo-image-source.c                   |  27 ++++
 src/cairo-image-surface.c                  |  16 ++
 src/cairo-png.c                            | 174 +++++++++++++++++++--
 src/cairo-script-surface.c                 |  20 +++
 src/cairo-xlib-display.c                   |  12 ++
 src/cairo.h                                |   6 +-
 src/cairoint.h                             |   2 +-
 test/any2ppm.c                             |   2 +
 test/map-to-image.c                        |   2 +
 test/png.c                                 |   2 +
 util/cairo-script/cairo-script-operators.c |  12 ++
 util/cairo-trace/trace.c                   |  37 ++---
 18 files changed, 416 insertions(+), 66 deletions(-)

-- 
2.19.2

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