gltransformation: GStreamer Base Plugins 1.0 Plugins Reference Manual

## gltransformation gltransformation |

## Types and Values

struct | GstGLTransformation

## Description

Transforms video on the GPU.

#### 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

## Functions

## Types and Values

### 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;
    };