Hi Nanhai,
Gwenole has proposed a few new APIs to support rendering a decoded surface into
a GL texture. See the attached header file as well as the following sample code
from Gwenole, and your comments are welcome.
Regards,
Jonathan
---
va_dpy = vaGetDisplayGLX();
glGenTextures(1, &gl_texture);
<setup a BGRA texture for example>
vaCreateSurfaceGLX(va_dpy, GL_TEXTURE_2D, gl_texture, &gl_surface);
vaCreateSurface(va_dpy, 1, &va_surface);
vaBeginPicture(va_dpy, va_context, va_surface);
...
vaEndPicture(va_dpy, va_surface);
vaCopySurfaceGLX(va_dpy, gl_surface, va_surface, flags);
---
-----Original Message-----
From: Zou, Nanhai
Sent: Wednesday, March 17, 2010 1:34 AM
To: Bian, Jonathan
Cc: libva@lists.freedesktop.org
Subject: Render to texture
Hi Jonathan,
As we have discussed, people are interested to let libva be able to
render to texture object.
Form our driver level, it is pretty easy for our driver to render to a
pixmap.
However pixmap is X related concept. From the libva level, it is better
to have an ID to represent some kind of texture object. How would you propose
the "render to texture" API?
Thanks
Zou Nanhai
/*
* Copyright (C) 2009 Splitted-Desktop Systems. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef VA_GLX_H
#define VA_GLX_H
#include <va/va.h>
#include <GL/glx.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* Return a suitable VADisplay for VA API
*
* @param[in] dpy the X11 display
* @return a VADisplay
*/
VADisplay vaGetDisplayGLX(
Display *dpy
);
/**
* Create a surface used for display to OpenGL
*
* The application shall maintain the live GLX context itself.
* Implementations are free to use glXGetCurrentContext() and
* glXGetCurrentDrawable() functions for internal purposes.
*
* @param[in] dpy the VA display
* @param[in] target the GL target to which the texture needs to be bound
* @param[in] texture the GL texture
* @param[out] gl_surface the VA/GLX surface
* @return VA_STATUS_SUCCESS if successful
*/
VAStatus vaCreateSurfaceGLX(
VADisplay dpy,
GLenum target,
GLuint texture,
void **gl_surface
);
/**
* Destroy a VA/GLX surface
*
* The application shall maintain the live GLX context itself.
* Implementations are free to use glXGetCurrentContext() and
* glXGetCurrentDrawable() functions for internal purposes.
*
* @param[in] dpy the VA display
* @param[in] gl_surface the VA surface
* @return VA_STATUS_SUCCESS if successful
*/
VAStatus vaDestroySurfaceGLX(
VADisplay dpy,
void *gl_surface
);
/**
* Copy a VA surface to a VA/GLX surface
*
* This function will not return until the copy is completed. At this
* point, the underlying GL texture will contain the surface pixels
* in an RGB format defined by the user.
*
* The application shall maintain the live GLX context itself.
* Implementations are free to use glXGetCurrentContext() and
* glXGetCurrentDrawable() functions for internal purposes.
*
* @param[in] dpy the VA display
* @param[in] gl_surface the VA/GLX destination surface
* @param[in] surface the VA source surface
* @param[in] flags the PutSurface flags
* @return VA_STATUS_SUCCESS if successful
*/
VAStatus vaCopySurfaceGLX(
VADisplay dpy,
void *gl_surface,
VASurfaceID surface,
unsigned int flags
);
#ifdef __cplusplus
}
#endif
#endif /* VA_GLX_H */
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