glshader
OpenGL fragment shader filter
Examples
 gst-launch-1.0 videotestsrc ! glupload ! glshader fragment="\"`cat myshader.frag`\"" ! glimagesink
FBO (Frame Buffer Object) and GLSL (OpenGL Shading Language) are required.
Depending on the exact OpenGL version chosen and the exact requirements of
the OpenGL implementation, a #version header may be required.
The following is a simple OpenGL ES (also usable with OpenGL 3 core contexts) passthrough shader with the required inputs.
 #version 100
 #ifdef GL_ES
 precision mediump float;
 #endif
 varying vec2 v_texcoord;
 uniform sampler2D tex;
 uniform float time;
 uniform float width;
 uniform float height;
 void main () {
   gl_FragColor = texture2D( tex, v_texcoord );
 }
Hierarchy
GObject ╰──GInitiallyUnowned ╰──GstObject ╰──GstElement ╰──GstBaseTransform ╰──GstGLBaseFilter ╰──GstGLFilter ╰──glshader
Factory details
Authors: – 
Classification: – Filter/Effect
Rank – none
Plugin – opengl
Package – GStreamer Base Plug-ins
Pad Templates
sink
        video/x-raw(ANY):
         format: RGBA
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
 texture-target: 2D
video/x-raw(memory:GLMemory):
         format: RGBA
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
 texture-target: 2D
src
        video/x-raw(memory:GLMemory):
         format: RGBA
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
 texture-target: 2D
video/x-raw(ANY):
         format: RGBA
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]
 texture-target: 2D
Signals
create-shader
GstGLShader * create_shader_callback (GstElement * param_0, gpointer udata)
def create_shader_callback (param_0, udata):
    #python callback for the 'create-shader' signal
function create_shader_callback(param_0: GstElement * param_0, udata: gpointer udata): {
    // javascript callback for the 'create-shader' signal
}
	Parameters:
param_0
–
udata
–
			
							No description available
					
	Flags: Run Last
Properties
update-shader
“update-shader” gboolean
Emit the 'create-shader' signal for the next frame
Flags : Read / Write
Default value : false
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