/*****************************************************************************
* sub_renderer.h
*****************************************************************************
* Copyright (C) 2020 Videolabs
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VLC_SUB_RENDERER_H
#define VLC_SUB_RENDERER_H
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_opengl.h>
#include "gl_api.h"
#include "gl_common.h"
#include "interop.h"
struct vlc_render_subpicture;
/**
* A subpictures renderer handles the rendering of RGB subpictures.
*/
struct vlc_gl_sub_renderer;
/**
* Create a new subpictures renderer
*
* \param gl the GL context
* \param api the OpenGL API
*/
struct vlc_gl_sub_renderer *
vlc_gl_sub_renderer_New(vlc_gl_t *gl, const struct vlc_gl_api *api,
struct vlc_gl_interop *interop);
/**
* Delete a subpictures renderer
*
* \param sr the renderer
*/
void
vlc_gl_sub_renderer_Delete(struct vlc_gl_sub_renderer *sr);
/**
* Prepare the fragment shader
*
* Concretely, it allocates OpenGL textures if necessary and uploads the
* picture.
*
* \param sr the renderer
* \param subpicture the subpicture to render
*/
int
vlc_gl_sub_renderer_Prepare(struct vlc_gl_sub_renderer *sr,
const struct vlc_render_subpicture *subpicture);
/**
* Change the output size
*/
void
vlc_gl_sub_renderer_SetOutputSize(struct vlc_gl_sub_renderer *sr,
unsigned width, unsigned height);
/**
* Draw the prepared subpicture
*
* \param sr the renderer
*/
int
vlc_gl_sub_renderer_Draw(struct vlc_gl_sub_renderer *sr);
#endif
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