Misc fixes; Hershey fonts support; Static display frames support #17
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Allow qplayvid to continue to build with pre-version 56 ffmpeg (libav) APIs. Fixes regression introduced by: 3fd071e Update qplayvid to newer ffmpeg APIs Signed-off-by: Kamal Mostafa <kamal@whence.com>
Allow the build to complete (without playvid and qplayvid) on pre-libav9 distros which do not provide libavresample. Signed-off-by: Kamal Mostafa <kamal@whence.com>
... for everything except the python stuff. Signed-off-by: Kamal Mostafa <kamal@whence.com>
... same as the rest of font routines do. Signed-off-by: Kamal Mostafa <kamal@whence.com>
This framework allows for the implementation of different font types including dynamically loaded fonts. Fonts are allocated and loaded via e.g.: Font *font = olGetFont(OL_FONT_SOMETHING, "somefontname"); Only OL_FONT_DEFAULT is currently implemented, hence: olGetFont(OL_FONT_DEFAULT, "unused") is equivalent to: olGetDefaultFont() olFreeFont(font) should be called to free fonts returned by olGetFont(), though freeing the default font is unnecessary (but harmless). No functional change (until some future type is implemented). Signed-off-by: Kamal Mostafa <kamal@whence.com>
No functional change. Signed-off-by: Kamal Mostafa <kamal@whence.com>
No functional change. Signed-off-by: Kamal Mostafa <kamal@whence.com>
If the libhersheyfont library is installed, build with support for
Hershey vector fonts. Adds new olFontType OL_HERSHEY_FONT, e.g.:
Font *olGetFont(OL_HERSHEY_FONT, fontname);
...
olFreeFont(font);
Signed-off-by: Kamal Mostafa <kamal@whence.com>
Demo app for the font engine -- supports the 'default' font and Hershey fonts. Signed-off-by: Kamal Mostafa <kamal@whence.com>
Signed-off-by: Kamal Mostafa <kamal@whence.com>
Handy developer debugging aid; No functional change. Signed-off-by: Kamal Mostafa <kamal@whence.com>
Signed-off-by: Kamal Mostafa <kamal@whence.com>
…eded Allows rendering of a single static frame, i.e. just one call to olRender() instead of an olRender()-loop. Allows for olRender() of empty frames containing no objects. Signed-off-by: Kamal Mostafa <kamal@whence.com>
Improve the handling of "duplicate" frames to allow them to be used
intentionally as successive static display frames, i.e. with arbitrary
asynchronous calls to olRender() instead of an olRender()-loop.
Before this change, each duplicate/static frame included an undesirable
laser-off traversal back to the last-rendered point of the previous frame,
since that traversal gets pre-rendered into the first object. This change
fixes the undesirable traversal.
Implementation notes:
- Keep track of the first "real" point and the first "wait" point of the
first object in each frame (i.e. not including the laser-off traversal
from the previous frame's last-rendered point).
- Whenever the process() callback notes that no new frame is available and
is therefore about to re-output a "duplicate" frame, it now:
- Computes and outputs a new laser-off traversal from last output
point to the recorded first real or wait point of the frame (taking
into account whether a wait is still needed).
- Skips past (does not output) the old pre-rendered laser-off traversal.
- disables the audio-passthrough channel output for the duplicate frame.
Signed-off-by: Kamal Mostafa <kamal@whence.com>
Signed-off-by: Kamal Mostafa <kamal@whence.com>
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Hershey fonts support:
http://www.whence.com/hershey-fonts
https://github.com/kamalmostafa/hershey-fonts
Note: the simplest Hershey font ("futural") traces considerably faster than the OpenLase built-in default font.
https://www.youtube.com/watch?v=8y04_yhh-ZM
Static display frames support:
http://www.youtube.com/watch?v=oo7A1fPmPiE
https://github.com/kamalmostafa/ucblogo