2018-09-23 05:48:44 +00:00
|
|
|
/*
|
|
|
|
Looking Glass - KVM FrameRelay (KVMFR) Client
|
|
|
|
Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
|
|
|
|
https://looking-glass.hostfission.com
|
|
|
|
|
|
|
|
This program is free software; you can redistribute it and/or modify it under
|
|
|
|
the terms of the GNU General Public License as published by the Free Software
|
|
|
|
Foundation; either version 2 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 General Public License for more details.
|
|
|
|
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
|
|
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
|
|
|
Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "egl_texture.h"
|
|
|
|
#include "debug.h"
|
|
|
|
#include "utils.h"
|
|
|
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
|
|
|
|
#include <SDL2/SDL_egl.h>
|
|
|
|
|
|
|
|
struct EGL_Texture
|
|
|
|
{
|
|
|
|
GLuint texture;
|
2018-09-23 05:56:47 +00:00
|
|
|
size_t width, height;
|
|
|
|
|
2018-09-23 05:48:44 +00:00
|
|
|
bool hasPBO;
|
|
|
|
GLuint pbo[2];
|
|
|
|
int pboIndex;
|
|
|
|
size_t pboBufferSize;
|
|
|
|
};
|
|
|
|
|
|
|
|
bool egl_texture_init(EGL_Texture ** texture)
|
|
|
|
{
|
|
|
|
*texture = (EGL_Texture *)malloc(sizeof(EGL_Texture));
|
|
|
|
if (!*texture)
|
|
|
|
{
|
|
|
|
DEBUG_ERROR("Failed to malloc EGL_Texture");
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(*texture, 0, sizeof(EGL_Texture));
|
|
|
|
glGenTextures(1, &(*texture)->texture);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void egl_texture_free(EGL_Texture ** texture)
|
|
|
|
{
|
|
|
|
if (!*texture)
|
|
|
|
return;
|
|
|
|
|
|
|
|
glDeleteTextures(1, &(*texture)->texture);
|
|
|
|
|
|
|
|
if ((*texture)->hasPBO)
|
|
|
|
glDeleteBuffers(2, (*texture)->pbo);
|
|
|
|
|
|
|
|
free(*texture);
|
|
|
|
*texture = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool egl_texture_init_streaming(EGL_Texture * texture, size_t width, size_t height, size_t bufferSize)
|
|
|
|
{
|
2018-09-23 05:56:47 +00:00
|
|
|
texture->width = width;
|
|
|
|
texture->height = height;
|
|
|
|
texture->pboBufferSize = bufferSize;
|
2018-09-23 05:48:44 +00:00
|
|
|
|
|
|
|
glBindTexture(GL_TEXTURE_2D, texture->texture);
|
|
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S , GL_CLAMP_TO_EDGE);
|
|
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T , GL_CLAMP_TO_EDGE);
|
|
|
|
glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
|
|
|
|
glBindTexture(GL_TEXTURE_2D, 0);
|
|
|
|
|
|
|
|
if (!texture->hasPBO)
|
2018-09-23 05:56:47 +00:00
|
|
|
{
|
2018-09-23 05:48:44 +00:00
|
|
|
glGenBuffers(2, texture->pbo);
|
2018-09-23 05:56:47 +00:00
|
|
|
texture->hasPBO = true;
|
|
|
|
}
|
2018-09-23 05:48:44 +00:00
|
|
|
|
|
|
|
for(int i = 0; i < 2; ++i)
|
|
|
|
{
|
|
|
|
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, texture->pbo[i]);
|
|
|
|
glBufferData(
|
|
|
|
GL_PIXEL_UNPACK_BUFFER,
|
|
|
|
bufferSize,
|
|
|
|
NULL,
|
|
|
|
GL_DYNAMIC_DRAW
|
|
|
|
);
|
|
|
|
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2018-09-23 05:56:47 +00:00
|
|
|
bool egl_texture_stream_buffer(EGL_Texture * texture, const uint8_t * buffer)
|
2018-09-23 05:48:44 +00:00
|
|
|
{
|
|
|
|
if (++texture->pboIndex == 2)
|
|
|
|
texture->pboIndex = 0;
|
|
|
|
|
|
|
|
glBindTexture(GL_TEXTURE_2D, texture->texture);
|
|
|
|
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, texture->pbo[texture->pboIndex]);
|
2018-09-23 05:56:47 +00:00
|
|
|
glBufferData(GL_PIXEL_UNPACK_BUFFER, texture->pboBufferSize, 0, GL_DYNAMIC_DRAW);
|
|
|
|
glBufferSubData(GL_PIXEL_UNPACK_BUFFER, 0, texture->pboBufferSize, buffer);
|
|
|
|
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, texture->width, texture->height, GL_RGBA, GL_UNSIGNED_BYTE, 0);
|
2018-09-23 05:48:44 +00:00
|
|
|
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
|
|
|
|
glBindTexture(GL_TEXTURE_2D, 0);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void egl_texture_bind(EGL_Texture * texture)
|
|
|
|
{
|
|
|
|
glBindTexture(GL_TEXTURE_2D, texture->texture);
|
|
|
|
}
|