Commit graph

6 commits

Author SHA1 Message Date
Matthew Waters
675415bf2e gl: try to use highp precision where supported
The use of mediump as a specifier in GLSL shaders will have limited
resolution and when used as texture coordinates may become inaccurate
over texture sizes of 1024.
2019-02-28 17:26:32 +11:00
Tim-Philipp Müller
c5b5ef16d3 gl: GST_EXPORT -> GST_GL_API
We need different export decorators for the different libs.
For now no actual change though, just rename before the release,
and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 12:10:29 +00:00
Julien Isorce
4952fdd956 gl: do not include GL headers in public gstgl headers
Except for gst/gl/gstglfuncs.h

It is up to the client app to include these headers.
It is coherent with the fact that gstreamer-gl.pc does not
require any egl.pc/gles.pc. I.e. it is the responsability
of the app to search these headers within its build setup.

For example gstreamer-vaapi includes explicitly EGL/egl.h
and search for it in its configure.ac.

For example with this patch, if an app includes the headers
  gst/gl/egl/gstglcontext_egl.h
  gst/gl/egl/gstgldisplay_egl.h
  gst/gl/egl/gstglmemoryegl.h
it will *no longer* automatically include EGL/egl.h and GLES2/gl2.h.
Which is good because the app might want to use the gstgl api only
without the need to bother about gl headers.

Also added a test: cd tests/check && make libs/gstglheaders.check

https://bugzilla.gnome.org/show_bug.cgi?id=784779
2017-12-09 19:32:29 +00:00
Nirbheek Chauhan
6106816f50 gstgl: Add GST_EXPORT to all symbols used on Windows
This is a requirement for those symbols to be exported in gstgl-1.0.dll
when building with the MSVC compiler
2017-12-09 19:32:23 +00:00
Matthew Waters
2d62b2910c gl: take the affine transformation in NDC
Provide a function to get the affine matrix in the meta in terms of NDC
coordinates and use as a standard opengl matrix.

Also advertise support for the affine transformation meta in the allocation
query.
2017-12-09 19:32:19 +00:00
Matthew Waters
b1ac029b87 glslstage: expose the default shader strings as public
Add some other simple strings for external-oes textures or transforming
the texture coordinates with a transformation matrix
2017-12-09 19:32:10 +00:00