f1402849
 dmayerich
renewed commit
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#include "rts_glRenderToTexture.h"
void rts_glRenderToTexture::Clean()
{
//clean up the fbo
glDeleteFramebuffersEXT(1, &fbo);
int num_tex = textures.size();
//clean up all textures associated with the fbo
for(int i=0; i<num_tex; i++)
textures[i].Clean();
textures.clear();
fbo = 0;
}
void rts_glRenderToTexture::Init(int w, int h)
{
CHECK_OPENGL_ERROR
if(fbo != 0)
Clean();
CHECK_OPENGL_ERROR
glGenFramebuffersEXT(1, &fbo); //create the framebuffer object
CHECK_OPENGL_ERROR
width = w;
height = h;
}
void rts_glRenderToTexture::AddTexture(GLenum target,
GLint internalformat,
GLenum format,
GLenum datatype,
GLint interpolation)
{
//create the new texture
rts_glTextureMap new_texture;
new_texture.Init(NULL,
target,
width,
height,
0,
internalformat,
format,
datatype,
interpolation);
//push it into the texture vector
textures.push_back(new_texture);
cout<<"Texture Name: "<<new_texture.name<<endl;
//bind it to the frame buffer
glBindFramebufferEXT(GL_FRAMEBUFFER, fbo);
CHECK_OPENGL_ERROR
glFramebufferTexture2DEXT(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0 + textures.size() - 1,
target,
new_texture.name,
0);
CHECK_OPENGL_ERROR
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER);
CHECK_OPENGL_ERROR
if(status != GL_FRAMEBUFFER_COMPLETE)
cout<<"Framebuffer status invalid!"<<endl;
//restore normal rendering
glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
}
void rts_glRenderToTexture::BeginRender(int texture)
{
//bind the framebuffer
glBindFramebufferEXT(GL_FRAMEBUFFER, fbo);
glDrawBuffer(GL_COLOR_ATTACHMENT0+texture);
}
void rts_glRenderToTexture::EndRender()
{
//glFinish();
//bind the screen buffer
glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
}
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