TextureStatic.cpp

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/*
 * Copyright (C) 2006-2020 Istituto Italiano di Tecnologia (IIT)
 *
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
#include "TextureStatic.h"
#include "GLDebug.h"
#include "OVRHeadsetLogComponent.h"
 
#include <yarp/os/LogStream.h>
 
#include <OVR_CAPI_GL.h>
 
TextureStatic::TextureStatic(ovrSession session, const TextureStatic::Image &img) :
    session(session),
    textureSwapChain(nullptr),
    width(img.width),
    height(img.height),
    bytes_per_pixel(img.bytes_per_pixel),
    // see http://stackoverflow.com/questions/27294882/glteximage2d-fails-with-error-1282-using-pbo-bad-texture-resolution
    padding((4 - (width * bytes_per_pixel) % 4) % 4),
    rowSize(width * bytes_per_pixel + padding),
    bufferSize(rowSize * height),
    ptr((GLubyte*)img.pixel_data)
{
    createTexture();
}
 
TextureStatic::~TextureStatic()
{
    deleteTexture();
}
 
void TextureStatic::createTexture()
{
    ovrTextureSwapChainDesc desc = {};
    desc.Type = ovrTexture_2D;
    desc.Format = OVR_FORMAT_R8G8B8A8_UNORM_SRGB;
    desc.ArraySize = 1;
    desc.Width = width;
    desc.Height = height;
    desc.MipLevels = 1;
    desc.SampleCount = 1;
    desc.StaticImage = ovrTrue;
    desc.MiscFlags = ovrTextureMisc_None;
    desc.BindFlags = ovrTextureBind_None;
 
    if (ovr_CreateTextureSwapChainGL(session, &desc, &textureSwapChain) != ovrSuccess) {
        yCFatal(OVRHEADSET) << "Failed to create texture swap chain";
    }
 
    ovr_GetTextureSwapChainBufferGL(session, textureSwapChain, -1, &chainTexId);
    checkGlErrorMacro;
 
    glBindTexture(GL_TEXTURE_2D, chainTexId);
    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_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
    checkGlErrorMacro;
 
    glBindTexture(GL_TEXTURE_2D, 0);
 
    ovr_CommitTextureSwapChain(session, textureSwapChain);
    checkGlErrorMacro;
}
 
void TextureStatic::deleteTexture()
{
    ovr_DestroyTextureSwapChain(session, textureSwapChain);
}