mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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[239/906] start to write the gtk doc
This commit is contained in:
Julien Isorce
Matthew Waters
parent
49455136b7
commit
1a7d45a789
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@ -96,9 +96,6 @@ gst_gl_test_src_smpte (GstGLTestSrc * v, GstGLBuffer * buffer, int w, int h)
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glMatrixMode (GL_PROJECTION);
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glLoadIdentity ();
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glMatrixMode (GL_MODELVIEW);
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glLoadIdentity ();
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for (i = 0; i < 7; i++) {
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glColor4f (vts_colors[i].R * (1 / 255.0f), vts_colors[i].G * (1 / 255.0f),
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vts_colors[i].B * (1 / 255.0f), 1.0f);
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@ -173,7 +170,7 @@ gst_gl_test_src_smpte (GstGLTestSrc * v, GstGLBuffer * buffer, int w, int h)
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glEnd ();
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}
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glColor4f (0.5, 0.5, 0.5, 1.0);
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glColor4f (1.0, 1.0, 1.0, 1.0);
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glBegin (GL_QUADS);
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glVertex3f (-1.0 + 2.0 * (0.75), -1.0 + 2.0 * 1, 0);
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glVertex3f (-1.0 + 2.0 * (1.0), -1.0 + 2.0 * 1, 0);
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@ -19,6 +19,20 @@
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-glbumper
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*
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* Bump mapping using the normal method.
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*
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch -v videotestsrc ! glupload ! glbumper location=normalmap.bmp ! glimagesink
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* ]| A pipeline to test normal mapping.
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* FBO and GLSL are required.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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@ -18,6 +18,30 @@
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-glcolorscale
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*
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* video frame scaling and colorspace conversion.
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*
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* <refsect2>
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* <title>Scaling and Color space conversion</title>
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* <para>
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* Equivalent to glupload ! gldownload.
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* </para>
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch -v videotestsrc ! "video/x-raw-yuv" ! glcolorscale ! ximagesink
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* ]| A pipeline to test colorspace conversion.
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* FBO is required.
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|[
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* gst-launch -v videotestsrc ! "video/x-raw-yuv, width=640, height=480, format=(fourcc)AYUV" ! glcolorscale ! \
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* "video/x-raw-yuv, width=320, height=240, format=(fourcc)YV12" ! autovideosink
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* ]| A pipeline to test hardware scaling and colorspace conversion.
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* FBO and GLSL are required.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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@ -19,6 +19,45 @@
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-gldownload
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*
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* download opengl textures into video frames.
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*
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* <refsect2>
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* <title>Color space conversion</title>
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* <para>
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* When needed, the color space conversion is made in a fragment shader using
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* one frame buffer object instance.
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* </para>
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch -v videotestsrc ! "video/x-raw-rgb" ! glupload ! gldownload ! \
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* "video/x-raw-rgb" ! ximagesink
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* ]| A pipeline to test downloading.
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* No special opengl extension is used in this pipeline, that's why it should work
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* with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3.
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|[
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* gst-launch -v videotestsrc ! "video/x-raw-rgb, width=640, height=480" ! glupload ! gldownload ! \
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* "video/x-raw-rgb, width=320, height=240" ! ximagesink
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* ]| A pipeline to test hardware scaling.
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* Frame buffer extension is required. Inded one FBO is used bettween glupload and gldownload,
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* because the texture needs to be resized.
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* |[
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* gst-launch -v gltestsrc ! gldownload ! xvimagesink
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* ]| A pipeline to test hardware colorspace conversion.
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* Your driver must support GLSL (OpenGL Shading Language needs OpenGL >= 2.1).
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* Texture RGB32T is converted to one of the 4 following format YUY2, UYVY, I420, YV12 and AYUV,
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* through some fragment shaders and using one framebuffer (FBO extension OpenGL >= 1.4).
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* MESA >= 7.1 supports GLSL but it's made in software.
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* |[
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* gst-launch -v videotestsrc ! glupload ! gldownload ! "video/x-raw-yuv, format=(fourcc)YUY2" ! glimagesink
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* ]| A pipeline to test hardware colorspace conversion
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* FBO and GLSL are required.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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@ -18,6 +18,24 @@
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-glfilterapp
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*
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* The resize and redraw callbacks can be set from a client code.
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*
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* <refsect2>
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* <title>CLient callbacks</title>
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* <para>
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* The graphic scene can be written from a client code through the
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* two glfilterapp properties.
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* </para>
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* </refsect2>
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* <refsect2>
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* <title>Examples</title>
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* see gst-plugins-gl/tests/examples/generic/recordgraphic
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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@ -18,6 +18,28 @@
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-glfiltercube
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*
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* The resize and redraw callbacks can be set from a client code.
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*
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch -v videotestsrc ! glupload ! glfiltercube ! glimagesink
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* ]| A pipeline to mpa textures on the 6 cube faces..
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* FBO is required.
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* |[
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* gst-launch -v videotestsrc ! glupload ! glfiltercube ! video/x-raw-gl, width=640, height=480 ! glimagesink
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* ]| Resize scene after drawing the cube.
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* The scene size is greater than the input video size.
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|[
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* gst-launch -v videotestsrc ! glupload ! video/x-raw-gl, width=640, height=480 ! glfiltercube ! glimagesink
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* ]| Resize scene before drawing the cube.
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* The scene size is greater than the input video size.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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@ -19,6 +19,23 @@
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-glfilterglass
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*
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* Map textures on moving glass.
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*
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch -v videotestsrc ! glupload ! glfilterglass ! glimagesink
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* ]| A pipeline inspired from http://www.mdk.org.pl/2007/11/17/gl-colorspace-conversions
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* FBO is required.
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* |[
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* gst-launch -v videotestsrc ! glupload ! glfilterglass ! "video/x-raw-gl, width=640, height=480" ! glimagesink
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* ]| The scene is greater than the input size.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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@ -20,6 +20,65 @@
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-glimagesink
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*
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* glimagesink renders video frames to a drawable on a local or remote
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* display using OpenGL. This element can receive a Window ID from the
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* application through the XOverlay interface and will then render video
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* frames in this drawable.
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* If no Window ID was provided by the application, the element will
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* create its own internal window and render into it.
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*
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* <refsect2>
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* <title>Scaling</title>
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* <para>
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* Depends on the driver, OpenGL handles hardware accelerated
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* scaling of video frames. This means that the element will just accept
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* incoming video frames no matter their geometry and will then put them to the
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* drawable scaling them on the fly. Using the #GstXvImageSink:force-aspect-ratio
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* property it is possible to enforce scaling with a constant aspect ratio,
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* which means drawing black borders around the video frame.
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* </para>
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* </refsect2>
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* <refsect2>
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* <title>Events</title>
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* <para>
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* Through the gl thread, glimagesink handle some events coming from the drawable
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* to manage its appearance even when the data is not flowing (GST_STATE_PAUSED).
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* That means that even when the element is paused, it will receive expose events
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* from the drawable and draw the latest frame with correct borders/aspect-ratio.
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* </para>
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* </refsect2>
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch -v videotestsrc ! "video/x-raw-rgb" ! glimagesink
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* ]| A pipeline to test hardware scaling.
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* No special opengl extension is used in this pipeline, that's why it should work
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* with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3.
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* |[
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* gst-launch -v videotestsrc ! "video/x-raw-yuv, format=(fourcc)I420" ! glimagesink
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* ]| A pipeline to test hardware scaling and hardware colorspace conversion.
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* When your driver supports GLSL (OpenGL Shading Language needs OpenGL >= 2.1),
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* the 4 following format YUY2, UYVY, I420, YV12 and AYUV are converted to RGB32
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* through some fragment shaders and using one framebuffer (FBO extension OpenGL >= 1.4).
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* If your driver does not support GLSL but supports MESA_YCbCr extension then
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* the you can use YUY2 and UYVY. In this case the colorspace conversion is automatically
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* made when loading the texture and therefore no framebuffer is used.
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* |[
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* gst-launch -v gltestsrc ! glimagesink
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* ]| A pipeline 100% OpenGL.
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* No special opengl extension is used in this pipeline, that's why it should work
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* with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3.
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* |[
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* gst-plugins-gl/tests/examples/generic/cube
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* ]| The graphic FPS scene can be greater than the input video FPS.
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* The graphic scene can be written from a client code through the
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* two glfilterapp properties.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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@ -25,16 +25,16 @@
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*
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* <refsect2>
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* <para>
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* The gltestsrc element is used to produce test video data in a wide variaty
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* of formats. The video test data produced can be controlled with the "pattern"
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* The gltestsrc element is used to produce test video texture.
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* The video test produced can be controlled with the "pattern"
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* property.
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* </para>
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* <title>Example launch line</title>
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* <para>
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* <programlisting>
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* gst-launch -v gltestsrc pattern=snow ! ximagesink
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* gst-launch -v gltestsrc pattern=smpte ! glimagesink
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* </programlisting>
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* Shows random noise in an X window.
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* Shows original SMPTE color bars in a window.
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* </para>
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* </refsect2>
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*/
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@ -19,6 +19,51 @@
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-glupload
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*
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* upload video frames video frames into opengl textures.
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*
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* <refsect2>
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* <title>Color space conversion</title>
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* <para>
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* Depends on the driver and when needed, the color space conversion is made
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* in a fragment shader using one frame buffer object instance, or using
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* mesa ycbcr .
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* </para>
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* </refsect2>
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch -v videotestsrc ! "video/x-raw-rgb" ! glupload ! glimagesink
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* ]| A pipeline to test hardware scaling.
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* No special opengl extension is used in this pipeline, that's why it should work
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* with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3.
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* |[
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* gst-launch -v videotestsrc ! "video/x-raw-yuv, format=(fourcc)I420" ! glupload ! glimagesink
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* ]| A pipeline to test hardware scaling and hardware colorspace conversion.
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* When your driver supports GLSL (OpenGL Shading Language needs OpenGL >= 2.1),
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* the 4 following format YUY2, UYVY, I420, YV12 and AYUV are converted to RGB32
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* through some fragment shaders and using one framebuffer (FBO extension OpenGL >= 1.4).
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* If your driver does not support GLSL but supports MESA_YCbCr extension then
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* the you can use YUY2 and UYVY. In this case the colorspace conversion is automatically
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* made when loading the texture and therefore no framebuffer is used.
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* |[
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* gst-launch -v videotestsrc ! "video/x-raw-rgb, width=320, height=240" ! glupload ! \
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* "video/x-raw-gl, width=640, height=480" ! glimagesink
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* ]| A pipeline to test hardware scaling.
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* Frame buffer extension is required. Inded one FBO is used bettween glupload and glimagesink,
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* because the texture needs to be resized.
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* |[
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* gst-launch -v videotestsrc ! "video/x-raw-yuv, width=320, height=240" ! glupload ! \
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* "video/x-raw-gl, width=640, height=480" ! glimagesink
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* ]| A pipeline to test hardware scaling.
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* Frame buffer extension is required. Inded one FBO is used bettween glupload and glimagesink,
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* because the texture needs to be resized. Depends on your driver the color space conversion
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* is made in a fragment shader using one frame buffer object instance, or using mesa ycbcr .
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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@ -21,6 +21,24 @@
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:plugin-opengl
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*
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* Cross-platform OpenGL plugin.
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* <refsect2>
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* <title>Debugging</title>
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* </refsect2>
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch-0.10 --gst-debug=gldisplay:3 videotestsrc ! glimagesink
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* ]| A debugging pipeline.
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|[
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* GST_GL_SHADER_DEBUG=1 gst-launch-0.10 videotestsrc ! glimagesink
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* ]| A debugging pipelines related to shaders.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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