Eigene Dateien/Vis/src/VImage.cpp

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#include "VImage.h"
#include "VFramebufferObject.h"

#include "glew.h"
#include "IL/il.h"
#include "IL/ilu.h"
#include "IL/ilut.h"

bool VImage::loadImage(std::string filename)
{
        if(!VFramebufferObject::devIlInitialised)
        {
                VFramebufferObject::initialiseDevIl();
        }
        
        deleteImage();

        unsigned int ilImageHandle;
        ilGenImages(1, &ilImageHandle);
        ilBindImage(ilImageHandle);
        ilLoadImage(filename.c_str());
        //iluFlipImage();
        m_ImageHandle = ilutGLBindMipmaps();

        
        ilDeleteImages(1, &ilImageHandle);
        if(m_ImageHandle == 0)
        {
                return false;
        }
        return true;
}

void VImage::deleteImage()
{
        if(m_ImageHandle != 0)
        {
                glDeleteTextures(1,&m_ImageHandle);
        }
}

void VImage::renderToLowerRightQuad()
{
        glActiveTextureARB(GL_TEXTURE0_ARB);
        glEnable(GL_TEXTURE_2D);
        glBindTexture(GL_TEXTURE_2D,m_ImageHandle);

        VFramebufferObject::getRenderToScreenProgram()->bind();

        glUniform1i(VFramebufferObject::getRenderToScreenProgram()->getUniformLocation("mTexture"),0);

        glBegin(GL_QUADS);
        glTexCoord2f(0.0f, 0.0f);
        glVertex3f(0.5f, -1.0f, -0.01f);

        glTexCoord2f(1.0f, 0.0f);
        glVertex3f(1.0f, -1.0f, -0.01f);

        glTexCoord2f(1.0f, 1.0f);
        glVertex3f(1.0f, -0.5f, -0.01f);

        glTexCoord2f(0.0f, 1.0f);
        glVertex3f(0.5f, -0.5f, -0.01f);
        glEnd();

        VFramebufferObject::getRenderToScreenProgram()->release();

        glActiveTextureARB(GL_TEXTURE0_ARB);
        glBindTexture(GL_TEXTURE_2D, 0);
        glDisable(GL_TEXTURE_2D);
}

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