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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>GstGLFilter: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
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<link rel="up" href="gl.html" title="OpenGL Integration Library">
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<link rel="prev" href="gst-plugins-base-libs-GstEGLImage.html" title="GstEGLImage">
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<link rel="next" href="GstGLFramebuffer.html" title="GstGLFramebuffer">
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<meta name="generator" content="GTK-Doc V1.27 (XML mode)">
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<link rel="stylesheet" href="style.css" type="text/css">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Top |
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Description |
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Object Hierarchy
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GstGLFilter
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GstGLFilter — GstBaseTransform subclass for dealing with RGBA textures
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Functions
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gboolean
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(*GstGLFilterRenderFunc) ()
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gboolean
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gst_gl_filter_render_to_target ()
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void
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gst_gl_filter_render_to_target_with_shader ()
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gboolean
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gst_gl_filter_filter_texture ()
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void
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gst_gl_filter_draw_fullscreen_quad ()
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Types and Values
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GstGLFilter
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GstGLFilterClass
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Object Hierarchy
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GObject
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╰── GInitiallyUnowned
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╰── GstObject
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╰── GstElement
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╰── GstBaseTransform
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╰── GstGLBaseFilter
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╰── GstGLFilter
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Includes
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#include <gst/gl/gl.h>
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Description
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GstGLFilter helps to implement simple OpenGL filter elements taking a
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single input and producing a single output with a GstGLFramebuffer
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Functions
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GstGLFilterRenderFunc ()
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gboolean
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(*GstGLFilterRenderFunc) (GstGLFilter *filter,
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GstGLMemory *in_tex,
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gpointer user_data);
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Parameters
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filter
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the GstGLFIlter
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in_tex
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the input GstGLMemory to render
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user_data
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user data
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Returns
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whether the render succeeded
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Since: 1.10
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gst_gl_filter_render_to_target ()
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gboolean
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gst_gl_filter_render_to_target (GstGLFilter *filter,
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GstGLMemory *input,
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GstGLMemory *output,
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GstGLFilterRenderFunc func,
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gpointer data);
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Transforms input
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into output
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using func
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on through FBO.
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Parameters
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filter
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a GstGLFilter
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input
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the input texture
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output
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the output texture
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func
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the function to transform input
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into output
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. called with data
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.
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[scope call]
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data
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the data associated with func
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.
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[allow-none]
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Returns
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the return value of func
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Since: 1.10
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gst_gl_filter_render_to_target_with_shader ()
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void
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gst_gl_filter_render_to_target_with_shader
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(GstGLFilter *filter,
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GstGLMemory *input,
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GstGLMemory *output,
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GstGLShader *shader);
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Transforms input
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into output
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using shader
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with a FBO.
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See also: gst_gl_filter_render_to_target()
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Parameters
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filter
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a GstGLFilter
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input
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the input texture
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output
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the output texture
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shader
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the shader to use.
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Since: 1.4
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gst_gl_filter_filter_texture ()
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gboolean
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gst_gl_filter_filter_texture (GstGLFilter *filter,
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GstBuffer *inbuf,
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GstBuffer *outbuf);
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Calls filter_texture vfunc with correctly mapped GstGLMemorys
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Parameters
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filter
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a GstGLFilter
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inbuf
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an input buffer
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outbuf
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an output buffer
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Returns
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whether the transformation succeeded
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Since: 1.4
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gst_gl_filter_draw_fullscreen_quad ()
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void
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gst_gl_filter_draw_fullscreen_quad (GstGLFilter *filter);
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Render a fullscreen quad using the current GL state. The only GL state this
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modifies is the necessary vertex/index buffers and, if necessary, a
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Vertex Array Object for drawing a fullscreen quad. Framebuffer state,
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any shaders, viewport state, etc must be setup by the caller.
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Parameters
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filter
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a GstGLFilter
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Since: 1.10
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Types and Values
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GstGLFilter
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typedef struct _GstGLFilter GstGLFilter;
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Members
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GstGLFilterClass
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typedef struct {
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GstGLBaseFilterClass parent_class;
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gboolean (*set_caps) (GstGLFilter* filter, GstCaps* incaps, GstCaps* outcaps);
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gboolean (*filter) (GstGLFilter *filter, GstBuffer *inbuf, GstBuffer *outbuf);
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gboolean (*filter_texture) (GstGLFilter *filter, GstGLMemory *in_tex, GstGLMemory *out_tex);
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gboolean (*init_fbo) (GstGLFilter *filter);
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GstCaps *(*transform_internal_caps) (GstGLFilter *filter,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps);
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} GstGLFilterClass;
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Members
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set_caps ()
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mirror from GstBaseTransform
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filter ()
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perform operations on the input and output buffers. In general,
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you should avoid using this method if at all possible. One valid
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use-case for using this is keeping previous buffers for future calculations.
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Note: If filter
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exists, then filter_texture
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is not run
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filter_texture ()
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given in_tex
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, transform it into out_tex
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. Not used
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if filter
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exists
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init_fbo ()
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perform initialization when the Framebuffer object is created
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transform_internal_caps ()
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Perform sub-class specific modifications of the
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caps to be processed between upload on input and before download for output.
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See Also
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GstBaseTransform, GstGLContext, GstGLFramebuffer
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</body>
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