Examples

1

gst-launch-1.0 gltestsrc ! gltransformation rotation-z=45 ! glimagesink

A pipeline to rotate by 45 degrees

1

gst-launch-1.0 gltestsrc ! gltransformation translation-x=0.5 ! glimagesink

Translate the video by 0.5

1

gst-launch-1.0 gltestsrc ! gltransformation scale-y=0.5 scale-x=0.5 ! glimagesink

Resize the video by 0.5

1

gst-launch-1.0 gltestsrc ! gltransformation rotation-x=-45 ortho=True ! glimagesink

Rotate the video around the X-Axis by -45° with an orthographic projection

struct GstGLTransformation

struct GstGLTransformation {
 GstGLFilter filter;
 GstGLShader *shader;
 GLuint vao;
 GLuint vbo_indices;
 GLuint vertex_buffer;
 GLint attr_position;
 GLint attr_texture;
 GstGLMemory *in_tex;
 GstGLMemory *out_tex;
 gfloat xrotation;
 gfloat yrotation;
 gfloat zrotation;
 gfloat xscale;
 gfloat yscale;
 gfloat xtranslation;
 gfloat ytranslation;
 gfloat ztranslation;
 gfloat xpivot;
 gfloat ypivot;
 gfloat zpivot;
 /* perspective */
 gfloat fov;
 gfloat aspect;
 gfloat znear;
 gfloat zfar;
 gboolean ortho;
 graphene_matrix_t model_matrix;
 graphene_matrix_t view_matrix;
 graphene_matrix_t projection_matrix;
 graphene_matrix_t inv_model_matrix;
 graphene_matrix_t inv_view_matrix;
 graphene_matrix_t inv_projection_matrix;
 graphene_matrix_t mvp_matrix;
 graphene_vec3_t camera_position;
 gboolean downstream_supports_affine_meta;
 gboolean caps_change;
};