gstreamer/ext/gl/gstglutils.h
Matthew Waters d8bc42fb30 glutils: fix matrix operations everywhere
- correct the matrix multiplication
- Use column-major matrices
  - reverse order of matrix multiplications

https://bugzilla.gnome.org/show_bug.cgi?id=785980
2017-08-23 15:32:10 +10:00

38 lines
1.4 KiB
C

/*
* GStreamer
* Copyright (C) 2016 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __EXT_GL_GST_GL_UTILS_H__
#define __EXT_GL_GST_GL_UTILS_H__
#include <gst/gl/gl.h>
G_BEGIN_DECLS
gboolean gst_gl_context_gen_shader (GstGLContext * context,
const gchar * shader_vertex_source,
const gchar * shader_fragment_source, GstGLShader ** shader);
void gst_gl_multiply_matrix4 (const gfloat * a, const gfloat * b, gfloat * result);
void gst_gl_get_affine_transformation_meta_as_ndc_ext (GstVideoAffineTransformationMeta *
meta, gfloat * matrix);
void gst_gl_set_affine_transformation_meta_from_ndc_ext (GstVideoAffineTransformationMeta * meta, const gfloat * matrix);
G_END_DECLS
#endif /* __EXT_GL_GST_GL_UTILS_H__ */