116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
/*
|
|
** gl_stereo3d.cpp
|
|
** Stereoscopic 3D API
|
|
**
|
|
**---------------------------------------------------------------------------
|
|
** Copyright 2015 Christopher Bruns
|
|
** All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
**
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. The name of the author may not be used to endorse or promote products
|
|
** derived from this software without specific prior written permission.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
**---------------------------------------------------------------------------
|
|
**
|
|
**
|
|
*/
|
|
|
|
#include "gl/system/gl_system.h"
|
|
#include "gl/stereo3d/gl_stereo3d.h"
|
|
#include "gl/renderer/gl_renderer.h"
|
|
#include "gl/renderer/gl_renderbuffers.h"
|
|
#include "vectors.h" // RAD2DEG
|
|
#include "doomtype.h" // M_PI
|
|
|
|
namespace s3d {
|
|
|
|
|
|
/* virtual */
|
|
VSMatrix EyePose::GetProjection(float fov, float aspectRatio, float fovRatio) const
|
|
{
|
|
VSMatrix result;
|
|
|
|
// Lifted from gl_scene.cpp FGLRenderer::SetProjection()
|
|
float fovy = (float)(2 * RAD2DEG(atan(tan(DEG2RAD(fov) / 2) / fovRatio)));
|
|
result.perspective(fovy, aspectRatio, 5.f, 65536.f);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* virtual */
|
|
Viewport EyePose::GetViewport(const Viewport& fullViewport) const
|
|
{
|
|
return fullViewport;
|
|
}
|
|
|
|
|
|
/* virtual */
|
|
void EyePose::GetViewShift(float yaw, float outViewShift[3]) const
|
|
{
|
|
// pass-through for Mono view
|
|
outViewShift[0] = 0;
|
|
outViewShift[1] = 0;
|
|
outViewShift[2] = 0;
|
|
}
|
|
|
|
|
|
Stereo3DMode::Stereo3DMode()
|
|
{
|
|
}
|
|
|
|
Stereo3DMode::~Stereo3DMode()
|
|
{
|
|
}
|
|
|
|
void Stereo3DMode::Present() const
|
|
{
|
|
// Example copying eye textures to the back buffer:
|
|
|
|
// The letterbox for the output destination.
|
|
// If stereo modes needs different dimensions then that needs to be added to FGLRenderer::SetOutputViewport.
|
|
const auto &box = GLRenderer->mOutputLetterbox;
|
|
|
|
GLRenderer->mBuffers->BindOutputFB();
|
|
glClearColor(0.0, 0.0, 0.0, 1.0);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
for (int eye_ix = 0; eye_ix < eye_count(); ++eye_ix)
|
|
{
|
|
GLRenderer->mBuffers->BindEyeFB(eye_ix, true);
|
|
int width = GLRenderer->mBuffers->GetWidth();
|
|
int height = GLRenderer->mBuffers->GetHeight();
|
|
glBlitFramebuffer(0, 0, width, height, box.left + eye_ix * box.width / eye_count(), box.top, box.left + (eye_ix + 1) * box.width / eye_count(), box.height, GL_COLOR_BUFFER_BIT, GL_LINEAR);
|
|
}
|
|
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
|
|
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
|
|
}
|
|
|
|
// Avoid static initialization order fiasco by declaring first Mode type (Mono) here in the
|
|
// same source file as Stereo3DMode::getCurrentMode()
|
|
// https://isocpp.org/wiki/faq/ctors#static-init-order
|
|
|
|
/* static */
|
|
const MonoView& MonoView::getInstance()
|
|
{
|
|
static MonoView instance;
|
|
return instance;
|
|
}
|
|
|
|
} /* namespace s3d */
|