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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#include "StandardShader.h"
#include "GLContext.h"
#include "ShaderRegistry.h"
#include "../base/Logger.h"
#include "../base/Exception.h"
#include <iostream>
using namespace std;
#define STANDARD_SHADER "standard"
#define MINIMAL_SHADER "minimal"
namespace avg {
StandardShaderPtr StandardShader::get()
{
return GLContext::getMain()->getStandardShader();
}
StandardShader::StandardShader()
{
avg::createShader(STANDARD_SHADER);
m_pShader = avg::getShader(STANDARD_SHADER);
m_pColorModelParam = m_pShader->getParam<int>("u_ColorModel");
m_pAlphaParam = m_pShader->getParam<float>("u_Alpha");
m_pColorCoeff0Param = m_pShader->getParam<glm::vec4>("u_ColorCoeff0");
m_pColorCoeff1Param = m_pShader->getParam<glm::vec4>("u_ColorCoeff1");
m_pColorCoeff2Param = m_pShader->getParam<glm::vec4>("u_ColorCoeff2");
m_pColorCoeff3Param = m_pShader->getParam<glm::vec4>("u_ColorCoeff3");
m_pGammaParam = m_pShader->getParam<glm::vec4>("u_Gamma");
m_pUseColorCoeffParam = m_pShader->getParam<int>("u_bUseColorCoeff");
m_pPremultipliedAlphaParam = m_pShader->getParam<int>("u_bPremultipliedAlpha");
m_pUseMaskParam = m_pShader->getParam<int>("u_bUseMask");
m_pMaskPosParam = m_pShader->getParam<glm::vec2>("u_MaskPos");
m_pMaskSizeParam = m_pShader->getParam<glm::vec2>("u_MaskSize");
m_pShader->activate();
m_pShader->getParam<int>("u_Texture")->set(0);
if (GLContext::getMain()->useGPUYUVConversion()) {
m_pShader->getParam<int>("u_CBTexture")->set(1);
m_pShader->getParam<int>("u_CRTexture")->set(2);
m_pShader->getParam<int>("u_ATexture")->set(3);
}
m_pShader->getParam<int>("u_MaskTexture")->set(4);
if (GLContext::getMain()->getShaderUsage() != GLConfig::FULL) {
avg::createShader(MINIMAL_SHADER);
m_pMinimalShader = avg::getShader(MINIMAL_SHADER);
m_pMinimalShader->activate();
m_pMinimalShader->getParam<int>("u_Texture")->set(0);
m_pMinimalAlphaParam = m_pMinimalShader->getParam<float>("u_Alpha");
}
generateWhiteTexture();
}
StandardShader::~StandardShader()
{
}
void StandardShader::activate()
{
if (useMinimalShader()) {
m_pMinimalShader->activate();
m_pMinimalShader->setTransform(m_Transform);
m_pMinimalAlphaParam->set(m_Alpha);
} else {
m_pShader->activate();
m_pShader->setTransform(m_Transform);
m_pColorModelParam->set(m_ColorModel);
m_pAlphaParam->set(m_Alpha);
m_pUseColorCoeffParam->set(m_bUseColorCoeff);
const glm::mat4& mat = m_ColorMatrix;
m_pColorCoeff0Param->set(glm::vec4(mat[0][0], mat[0][1], mat[0][2], 0));
m_pColorCoeff1Param->set(glm::vec4(mat[1][0], mat[1][1], mat[1][2], 0));
m_pColorCoeff2Param->set(glm::vec4(mat[2][0], mat[2][1], mat[2][2], 0));
m_pColorCoeff3Param->set(glm::vec4(mat[3][0], mat[3][1], mat[3][2], 1));
m_pGammaParam->set(m_Gamma);
m_pPremultipliedAlphaParam->set(m_bPremultipliedAlpha);
m_pUseMaskParam->set(m_bUseMask);
if (m_bUseMask) {
m_pMaskPosParam->set(m_MaskPos);
m_pMaskSizeParam->set(m_MaskSize);
}
}
}
void StandardShader::setTransform(const glm::mat4& transform)
{
m_Transform = transform;
}
void StandardShader::setColorModel(int model)
{
m_ColorModel = model;
}
void StandardShader::setAlpha(float alpha)
{
m_Alpha = alpha;
}
void StandardShader::setUntextured()
{
// Activate an internal 1x1 A8 texture.
m_ColorModel = 2;
m_pWhiteTex->activate(GL_TEXTURE0);
disableColorspaceMatrix();
setGamma(glm::vec4(1.f,1.f,1.f,1.f));
setPremultipliedAlpha(false);
setMask(false);
}
void StandardShader::setColorspaceMatrix(const glm::mat4& mat)
{
m_bUseColorCoeff = true;
m_ColorMatrix = mat;
}
void StandardShader::disableColorspaceMatrix()
{
m_bUseColorCoeff = false;
}
void StandardShader::setGamma(const glm::vec4& gamma)
{
m_Gamma = gamma;
}
void StandardShader::setPremultipliedAlpha(bool bPremultipliedAlpha)
{
m_bPremultipliedAlpha = bPremultipliedAlpha;
}
void StandardShader::setMask(bool bUseMask, const glm::vec2& maskPos,
const glm::vec2& maskSize)
{
m_bUseMask = bUseMask;
m_MaskPos = maskPos;
m_MaskSize = maskSize;
}
const OGLShaderPtr& StandardShader::getShader() const
{
if (useMinimalShader()) {
return m_pMinimalShader;
} else {
return m_pShader;
}
}
void StandardShader::dump() const
{
cerr << "---------Standard shader--------" << endl;
cerr << " m_Transform: " << m_Transform << endl;
cerr << " m_ColorModel: " << m_ColorModel << endl;
cerr << " m_Alpha: " << m_Alpha << endl;
cerr << " m_bUseColorCoeff: " << m_bUseColorCoeff << endl;
cerr << " m_ColorMatrix: " << m_ColorMatrix << endl;
cerr << " m_Gamma: " << m_Gamma << endl;
cerr << " m_bPremultipliedAlpha: " << m_bPremultipliedAlpha << endl;
cerr << " m_bUseMask: " << m_bUseMask << endl;
cerr << " m_MaskPos: " << m_MaskPos << endl;
cerr << " m_MaskSize: " << m_MaskSize << endl;
cerr << endl;
}
void StandardShader::generateWhiteTexture()
{
BitmapPtr pBmp(new Bitmap(glm::vec2(1,1), I8));
*(pBmp->getPixels()) = 255;
m_pWhiteTex = GLTexturePtr(new GLTexture(IntPoint(1,1), I8));
m_pWhiteTex->moveBmpToTexture(pBmp);
}
bool StandardShader::useMinimalShader() const
{
bool bActivateMinimal = false;
if (GLContext::getMain()->getShaderUsage() != GLConfig::FULL) {
bool bGammaIsModified = (!almostEqual(m_Gamma, glm::vec4(1.0f,1.0f,1.0f,1.0f)));
if (m_ColorModel == 0 && !m_bUseColorCoeff && !bGammaIsModified && !m_bUseMask) {
bActivateMinimal = true;
}
}
return bActivateMinimal;
}
}
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